15473af04SMark Nutter /* 25473af04SMark Nutter * spu_switch.c 35473af04SMark Nutter * 45473af04SMark Nutter * (C) Copyright IBM Corp. 2005 55473af04SMark Nutter * 65473af04SMark Nutter * Author: Mark Nutter <mnutter@us.ibm.com> 75473af04SMark Nutter * 85473af04SMark Nutter * Host-side part of SPU context switch sequence outlined in 95473af04SMark Nutter * Synergistic Processor Element, Book IV. 105473af04SMark Nutter * 115473af04SMark Nutter * A fully premptive switch of an SPE is very expensive in terms 125473af04SMark Nutter * of time and system resources. SPE Book IV indicates that SPE 135473af04SMark Nutter * allocation should follow a "serially reusable device" model, 145473af04SMark Nutter * in which the SPE is assigned a task until it completes. When 155473af04SMark Nutter * this is not possible, this sequence may be used to premptively 165473af04SMark Nutter * save, and then later (optionally) restore the context of a 175473af04SMark Nutter * program executing on an SPE. 185473af04SMark Nutter * 195473af04SMark Nutter * 205473af04SMark Nutter * This program is free software; you can redistribute it and/or modify 215473af04SMark Nutter * it under the terms of the GNU General Public License as published by 225473af04SMark Nutter * the Free Software Foundation; either version 2, or (at your option) 235473af04SMark Nutter * any later version. 245473af04SMark Nutter * 255473af04SMark Nutter * This program is distributed in the hope that it will be useful, 265473af04SMark Nutter * but WITHOUT ANY WARRANTY; without even the implied warranty of 275473af04SMark Nutter * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 285473af04SMark Nutter * GNU General Public License for more details. 295473af04SMark Nutter * 305473af04SMark Nutter * You should have received a copy of the GNU General Public License 315473af04SMark Nutter * along with this program; if not, write to the Free Software 325473af04SMark Nutter * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 335473af04SMark Nutter */ 345473af04SMark Nutter 355473af04SMark Nutter #include <linux/config.h> 365473af04SMark Nutter #include <linux/module.h> 375473af04SMark Nutter #include <linux/errno.h> 385473af04SMark Nutter #include <linux/sched.h> 395473af04SMark Nutter #include <linux/kernel.h> 405473af04SMark Nutter #include <linux/mm.h> 415473af04SMark Nutter #include <linux/vmalloc.h> 425473af04SMark Nutter #include <linux/smp.h> 435473af04SMark Nutter #include <linux/smp_lock.h> 445473af04SMark Nutter #include <linux/stddef.h> 455473af04SMark Nutter #include <linux/unistd.h> 465473af04SMark Nutter 475473af04SMark Nutter #include <asm/io.h> 485473af04SMark Nutter #include <asm/spu.h> 495473af04SMark Nutter #include <asm/spu_csa.h> 505473af04SMark Nutter #include <asm/mmu_context.h> 515473af04SMark Nutter 525473af04SMark Nutter #include "spu_save_dump.h" 535473af04SMark Nutter #include "spu_restore_dump.h" 545473af04SMark Nutter 557c038749SMark Nutter #if 0 567c038749SMark Nutter #define POLL_WHILE_TRUE(_c) { \ 577c038749SMark Nutter do { \ 587c038749SMark Nutter } while (_c); \ 597c038749SMark Nutter } 607c038749SMark Nutter #else 617c038749SMark Nutter #define RELAX_SPIN_COUNT 1000 627c038749SMark Nutter #define POLL_WHILE_TRUE(_c) { \ 637c038749SMark Nutter do { \ 647c038749SMark Nutter int _i; \ 657c038749SMark Nutter for (_i=0; _i<RELAX_SPIN_COUNT && (_c); _i++) { \ 667c038749SMark Nutter cpu_relax(); \ 677c038749SMark Nutter } \ 687c038749SMark Nutter if (unlikely(_c)) yield(); \ 697c038749SMark Nutter else break; \ 707c038749SMark Nutter } while (_c); \ 717c038749SMark Nutter } 727c038749SMark Nutter #endif /* debug */ 737c038749SMark Nutter 747c038749SMark Nutter #define POLL_WHILE_FALSE(_c) POLL_WHILE_TRUE(!(_c)) 757c038749SMark Nutter 767c038749SMark Nutter static inline void acquire_spu_lock(struct spu *spu) 777c038749SMark Nutter { 787c038749SMark Nutter /* Save, Step 1: 797c038749SMark Nutter * Restore, Step 1: 807c038749SMark Nutter * Acquire SPU-specific mutual exclusion lock. 817c038749SMark Nutter * TBD. 827c038749SMark Nutter */ 837c038749SMark Nutter } 847c038749SMark Nutter 857c038749SMark Nutter static inline void release_spu_lock(struct spu *spu) 867c038749SMark Nutter { 877c038749SMark Nutter /* Restore, Step 76: 887c038749SMark Nutter * Release SPU-specific mutual exclusion lock. 897c038749SMark Nutter * TBD. 907c038749SMark Nutter */ 917c038749SMark Nutter } 927c038749SMark Nutter 937c038749SMark Nutter static inline int check_spu_isolate(struct spu_state *csa, struct spu *spu) 947c038749SMark Nutter { 957c038749SMark Nutter struct spu_problem __iomem *prob = spu->problem; 967c038749SMark Nutter u32 isolate_state; 977c038749SMark Nutter 987c038749SMark Nutter /* Save, Step 2: 997c038749SMark Nutter * Save, Step 6: 1007c038749SMark Nutter * If SPU_Status[E,L,IS] any field is '1', this 1017c038749SMark Nutter * SPU is in isolate state and cannot be context 1027c038749SMark Nutter * saved at this time. 1037c038749SMark Nutter */ 1047c038749SMark Nutter isolate_state = SPU_STATUS_ISOLATED_STATE | 1057c038749SMark Nutter SPU_STATUS_ISOLATED_LOAD_STAUTUS | SPU_STATUS_ISOLATED_EXIT_STAUTUS; 1067c038749SMark Nutter return (in_be32(&prob->spu_status_R) & isolate_state) ? 1 : 0; 1077c038749SMark Nutter } 1087c038749SMark Nutter 1097c038749SMark Nutter static inline void disable_interrupts(struct spu_state *csa, struct spu *spu) 1107c038749SMark Nutter { 1117c038749SMark Nutter /* Save, Step 3: 1127c038749SMark Nutter * Restore, Step 2: 1137c038749SMark Nutter * Save INT_Mask_class0 in CSA. 1147c038749SMark Nutter * Write INT_MASK_class0 with value of 0. 1157c038749SMark Nutter * Save INT_Mask_class1 in CSA. 1167c038749SMark Nutter * Write INT_MASK_class1 with value of 0. 1177c038749SMark Nutter * Save INT_Mask_class2 in CSA. 1187c038749SMark Nutter * Write INT_MASK_class2 with value of 0. 1197c038749SMark Nutter */ 1207c038749SMark Nutter spin_lock_irq(&spu->register_lock); 1217c038749SMark Nutter if (csa) { 122f0831accSArnd Bergmann csa->priv1.int_mask_class0_RW = spu_int_mask_get(spu, 0); 123f0831accSArnd Bergmann csa->priv1.int_mask_class1_RW = spu_int_mask_get(spu, 1); 124f0831accSArnd Bergmann csa->priv1.int_mask_class2_RW = spu_int_mask_get(spu, 2); 1257c038749SMark Nutter } 126f0831accSArnd Bergmann spu_int_mask_set(spu, 0, 0ul); 127f0831accSArnd Bergmann spu_int_mask_set(spu, 1, 0ul); 128f0831accSArnd Bergmann spu_int_mask_set(spu, 2, 0ul); 1297c038749SMark Nutter eieio(); 1307c038749SMark Nutter spin_unlock_irq(&spu->register_lock); 1317c038749SMark Nutter } 1327c038749SMark Nutter 1337c038749SMark Nutter static inline void set_watchdog_timer(struct spu_state *csa, struct spu *spu) 1347c038749SMark Nutter { 1357c038749SMark Nutter /* Save, Step 4: 1367c038749SMark Nutter * Restore, Step 25. 1377c038749SMark Nutter * Set a software watchdog timer, which specifies the 1387c038749SMark Nutter * maximum allowable time for a context save sequence. 1397c038749SMark Nutter * 1407c038749SMark Nutter * For present, this implementation will not set a global 1417c038749SMark Nutter * watchdog timer, as virtualization & variable system load 1427c038749SMark Nutter * may cause unpredictable execution times. 1437c038749SMark Nutter */ 1447c038749SMark Nutter } 1457c038749SMark Nutter 1467c038749SMark Nutter static inline void inhibit_user_access(struct spu_state *csa, struct spu *spu) 1477c038749SMark Nutter { 1487c038749SMark Nutter /* Save, Step 5: 1497c038749SMark Nutter * Restore, Step 3: 1507c038749SMark Nutter * Inhibit user-space access (if provided) to this 1517c038749SMark Nutter * SPU by unmapping the virtual pages assigned to 1527c038749SMark Nutter * the SPU memory-mapped I/O (MMIO) for problem 1537c038749SMark Nutter * state. TBD. 1547c038749SMark Nutter */ 1557c038749SMark Nutter } 1567c038749SMark Nutter 1577c038749SMark Nutter static inline void set_switch_pending(struct spu_state *csa, struct spu *spu) 1587c038749SMark Nutter { 1597c038749SMark Nutter /* Save, Step 7: 1607c038749SMark Nutter * Restore, Step 5: 1617c038749SMark Nutter * Set a software context switch pending flag. 1627c038749SMark Nutter */ 1638837d921SArnd Bergmann set_bit(SPU_CONTEXT_SWITCH_PENDING, &spu->flags); 1647c038749SMark Nutter mb(); 1657c038749SMark Nutter } 1667c038749SMark Nutter 1677c038749SMark Nutter static inline void save_mfc_cntl(struct spu_state *csa, struct spu *spu) 1687c038749SMark Nutter { 1697c038749SMark Nutter struct spu_priv2 __iomem *priv2 = spu->priv2; 1707c038749SMark Nutter 1717c038749SMark Nutter /* Save, Step 8: 1727f52eb00SGeoff Levand * Suspend DMA and save MFC_CNTL. 1737c038749SMark Nutter */ 1747f52eb00SGeoff Levand switch (in_be64(&priv2->mfc_control_RW) & 1757f52eb00SGeoff Levand MFC_CNTL_SUSPEND_DMA_STATUS_MASK) { 1767f52eb00SGeoff Levand case MFC_CNTL_SUSPEND_IN_PROGRESS: 1777f52eb00SGeoff Levand POLL_WHILE_FALSE((in_be64(&priv2->mfc_control_RW) & 1787f52eb00SGeoff Levand MFC_CNTL_SUSPEND_DMA_STATUS_MASK) == 1797f52eb00SGeoff Levand MFC_CNTL_SUSPEND_COMPLETE); 1807f52eb00SGeoff Levand /* fall through */ 1817f52eb00SGeoff Levand case MFC_CNTL_SUSPEND_COMPLETE: 1827c038749SMark Nutter if (csa) { 1837f52eb00SGeoff Levand csa->priv2.mfc_control_RW = 1847f52eb00SGeoff Levand in_be64(&priv2->mfc_control_RW) | 1857f52eb00SGeoff Levand MFC_CNTL_SUSPEND_DMA_QUEUE; 1867f52eb00SGeoff Levand } 1877f52eb00SGeoff Levand break; 1887f52eb00SGeoff Levand case MFC_CNTL_NORMAL_DMA_QUEUE_OPERATION: 1897f52eb00SGeoff Levand out_be64(&priv2->mfc_control_RW, MFC_CNTL_SUSPEND_DMA_QUEUE); 1907f52eb00SGeoff Levand POLL_WHILE_FALSE((in_be64(&priv2->mfc_control_RW) & 1917f52eb00SGeoff Levand MFC_CNTL_SUSPEND_DMA_STATUS_MASK) == 1927f52eb00SGeoff Levand MFC_CNTL_SUSPEND_COMPLETE); 1937f52eb00SGeoff Levand if (csa) { 1947f52eb00SGeoff Levand csa->priv2.mfc_control_RW = 1957f52eb00SGeoff Levand in_be64(&priv2->mfc_control_RW) & 1967f52eb00SGeoff Levand ~MFC_CNTL_SUSPEND_DMA_QUEUE; 1977f52eb00SGeoff Levand } 1987f52eb00SGeoff Levand break; 1997c038749SMark Nutter } 2007c038749SMark Nutter } 2017c038749SMark Nutter 2027c038749SMark Nutter static inline void save_spu_runcntl(struct spu_state *csa, struct spu *spu) 2037c038749SMark Nutter { 2047c038749SMark Nutter struct spu_problem __iomem *prob = spu->problem; 2057c038749SMark Nutter 2067c038749SMark Nutter /* Save, Step 9: 2077c038749SMark Nutter * Save SPU_Runcntl in the CSA. This value contains 2087c038749SMark Nutter * the "Application Desired State". 2097c038749SMark Nutter */ 2107c038749SMark Nutter csa->prob.spu_runcntl_RW = in_be32(&prob->spu_runcntl_RW); 2117c038749SMark Nutter } 2127c038749SMark Nutter 2137c038749SMark Nutter static inline void save_mfc_sr1(struct spu_state *csa, struct spu *spu) 2147c038749SMark Nutter { 2157c038749SMark Nutter /* Save, Step 10: 2167c038749SMark Nutter * Save MFC_SR1 in the CSA. 2177c038749SMark Nutter */ 218f0831accSArnd Bergmann csa->priv1.mfc_sr1_RW = spu_mfc_sr1_get(spu); 2197c038749SMark Nutter } 2207c038749SMark Nutter 2217c038749SMark Nutter static inline void save_spu_status(struct spu_state *csa, struct spu *spu) 2227c038749SMark Nutter { 2237c038749SMark Nutter struct spu_problem __iomem *prob = spu->problem; 2247c038749SMark Nutter 2257c038749SMark Nutter /* Save, Step 11: 2267c038749SMark Nutter * Read SPU_Status[R], and save to CSA. 2277c038749SMark Nutter */ 2287c038749SMark Nutter if ((in_be32(&prob->spu_status_R) & SPU_STATUS_RUNNING) == 0) { 2297c038749SMark Nutter csa->prob.spu_status_R = in_be32(&prob->spu_status_R); 2307c038749SMark Nutter } else { 2317c038749SMark Nutter u32 stopped; 2327c038749SMark Nutter 2337c038749SMark Nutter out_be32(&prob->spu_runcntl_RW, SPU_RUNCNTL_STOP); 2347c038749SMark Nutter eieio(); 2357c038749SMark Nutter POLL_WHILE_TRUE(in_be32(&prob->spu_status_R) & 2367c038749SMark Nutter SPU_STATUS_RUNNING); 2377c038749SMark Nutter stopped = 2387c038749SMark Nutter SPU_STATUS_INVALID_INSTR | SPU_STATUS_SINGLE_STEP | 2397c038749SMark Nutter SPU_STATUS_STOPPED_BY_HALT | SPU_STATUS_STOPPED_BY_STOP; 2407c038749SMark Nutter if ((in_be32(&prob->spu_status_R) & stopped) == 0) 2417c038749SMark Nutter csa->prob.spu_status_R = SPU_STATUS_RUNNING; 2427c038749SMark Nutter else 2437c038749SMark Nutter csa->prob.spu_status_R = in_be32(&prob->spu_status_R); 2447c038749SMark Nutter } 2457c038749SMark Nutter } 2467c038749SMark Nutter 2477c038749SMark Nutter static inline void save_mfc_decr(struct spu_state *csa, struct spu *spu) 2487c038749SMark Nutter { 2497c038749SMark Nutter struct spu_priv2 __iomem *priv2 = spu->priv2; 2507c038749SMark Nutter 2517c038749SMark Nutter /* Save, Step 12: 2527c038749SMark Nutter * Read MFC_CNTL[Ds]. Update saved copy of 2537c038749SMark Nutter * CSA.MFC_CNTL[Ds]. 2547c038749SMark Nutter */ 2557c038749SMark Nutter if (in_be64(&priv2->mfc_control_RW) & MFC_CNTL_DECREMENTER_RUNNING) { 2567c038749SMark Nutter csa->priv2.mfc_control_RW |= MFC_CNTL_DECREMENTER_RUNNING; 2577c038749SMark Nutter csa->suspend_time = get_cycles(); 2587c038749SMark Nutter out_be64(&priv2->spu_chnlcntptr_RW, 7ULL); 2597c038749SMark Nutter eieio(); 2607c038749SMark Nutter csa->spu_chnldata_RW[7] = in_be64(&priv2->spu_chnldata_RW); 2617c038749SMark Nutter eieio(); 2627f52eb00SGeoff Levand } else { 2637f52eb00SGeoff Levand csa->priv2.mfc_control_RW &= ~MFC_CNTL_DECREMENTER_RUNNING; 2647c038749SMark Nutter } 2657c038749SMark Nutter } 2667c038749SMark Nutter 2677c038749SMark Nutter static inline void halt_mfc_decr(struct spu_state *csa, struct spu *spu) 2687c038749SMark Nutter { 2697c038749SMark Nutter struct spu_priv2 __iomem *priv2 = spu->priv2; 2707c038749SMark Nutter 2717c038749SMark Nutter /* Save, Step 13: 2727c038749SMark Nutter * Write MFC_CNTL[Dh] set to a '1' to halt 2737c038749SMark Nutter * the decrementer. 2747c038749SMark Nutter */ 2757c038749SMark Nutter out_be64(&priv2->mfc_control_RW, MFC_CNTL_DECREMENTER_HALTED); 2767c038749SMark Nutter eieio(); 2777c038749SMark Nutter } 2787c038749SMark Nutter 2797c038749SMark Nutter static inline void save_timebase(struct spu_state *csa, struct spu *spu) 2807c038749SMark Nutter { 2817c038749SMark Nutter /* Save, Step 14: 2827c038749SMark Nutter * Read PPE Timebase High and Timebase low registers 2837c038749SMark Nutter * and save in CSA. TBD. 2847c038749SMark Nutter */ 2857c038749SMark Nutter csa->suspend_time = get_cycles(); 2867c038749SMark Nutter } 2877c038749SMark Nutter 2887c038749SMark Nutter static inline void remove_other_spu_access(struct spu_state *csa, 2897c038749SMark Nutter struct spu *spu) 2907c038749SMark Nutter { 2917c038749SMark Nutter /* Save, Step 15: 2927c038749SMark Nutter * Remove other SPU access to this SPU by unmapping 2937c038749SMark Nutter * this SPU's pages from their address space. TBD. 2947c038749SMark Nutter */ 2957c038749SMark Nutter } 2967c038749SMark Nutter 2977c038749SMark Nutter static inline void do_mfc_mssync(struct spu_state *csa, struct spu *spu) 2987c038749SMark Nutter { 2997c038749SMark Nutter struct spu_problem __iomem *prob = spu->problem; 3007c038749SMark Nutter 3017c038749SMark Nutter /* Save, Step 16: 3027c038749SMark Nutter * Restore, Step 11. 3037c038749SMark Nutter * Write SPU_MSSync register. Poll SPU_MSSync[P] 3047c038749SMark Nutter * for a value of 0. 3057c038749SMark Nutter */ 3067c038749SMark Nutter out_be64(&prob->spc_mssync_RW, 1UL); 3077c038749SMark Nutter POLL_WHILE_TRUE(in_be64(&prob->spc_mssync_RW) & MS_SYNC_PENDING); 3087c038749SMark Nutter } 3097c038749SMark Nutter 3107c038749SMark Nutter static inline void issue_mfc_tlbie(struct spu_state *csa, struct spu *spu) 3117c038749SMark Nutter { 3127c038749SMark Nutter /* Save, Step 17: 3137c038749SMark Nutter * Restore, Step 12. 3147c038749SMark Nutter * Restore, Step 48. 3157c038749SMark Nutter * Write TLB_Invalidate_Entry[IS,VPN,L,Lp]=0 register. 3167c038749SMark Nutter * Then issue a PPE sync instruction. 3177c038749SMark Nutter */ 318f0831accSArnd Bergmann spu_tlb_invalidate(spu); 3197c038749SMark Nutter mb(); 3207c038749SMark Nutter } 3217c038749SMark Nutter 3227c038749SMark Nutter static inline void handle_pending_interrupts(struct spu_state *csa, 3237c038749SMark Nutter struct spu *spu) 3247c038749SMark Nutter { 3257c038749SMark Nutter /* Save, Step 18: 3267c038749SMark Nutter * Handle any pending interrupts from this SPU 3277c038749SMark Nutter * here. This is OS or hypervisor specific. One 3287c038749SMark Nutter * option is to re-enable interrupts to handle any 3297c038749SMark Nutter * pending interrupts, with the interrupt handlers 3307c038749SMark Nutter * recognizing the software Context Switch Pending 3317c038749SMark Nutter * flag, to ensure the SPU execution or MFC command 3327c038749SMark Nutter * queue is not restarted. TBD. 3337c038749SMark Nutter */ 3347c038749SMark Nutter } 3357c038749SMark Nutter 3367c038749SMark Nutter static inline void save_mfc_queues(struct spu_state *csa, struct spu *spu) 3377c038749SMark Nutter { 3387c038749SMark Nutter struct spu_priv2 __iomem *priv2 = spu->priv2; 3397c038749SMark Nutter int i; 3407c038749SMark Nutter 3417c038749SMark Nutter /* Save, Step 19: 3427c038749SMark Nutter * If MFC_Cntl[Se]=0 then save 3437c038749SMark Nutter * MFC command queues. 3447c038749SMark Nutter */ 3457c038749SMark Nutter if ((in_be64(&priv2->mfc_control_RW) & MFC_CNTL_DMA_QUEUES_EMPTY) == 0) { 3467c038749SMark Nutter for (i = 0; i < 8; i++) { 3477c038749SMark Nutter csa->priv2.puq[i].mfc_cq_data0_RW = 3487c038749SMark Nutter in_be64(&priv2->puq[i].mfc_cq_data0_RW); 3497c038749SMark Nutter csa->priv2.puq[i].mfc_cq_data1_RW = 3507c038749SMark Nutter in_be64(&priv2->puq[i].mfc_cq_data1_RW); 3517c038749SMark Nutter csa->priv2.puq[i].mfc_cq_data2_RW = 3527c038749SMark Nutter in_be64(&priv2->puq[i].mfc_cq_data2_RW); 3537c038749SMark Nutter csa->priv2.puq[i].mfc_cq_data3_RW = 3547c038749SMark Nutter in_be64(&priv2->puq[i].mfc_cq_data3_RW); 3557c038749SMark Nutter } 3567c038749SMark Nutter for (i = 0; i < 16; i++) { 3577c038749SMark Nutter csa->priv2.spuq[i].mfc_cq_data0_RW = 3587c038749SMark Nutter in_be64(&priv2->spuq[i].mfc_cq_data0_RW); 3597c038749SMark Nutter csa->priv2.spuq[i].mfc_cq_data1_RW = 3607c038749SMark Nutter in_be64(&priv2->spuq[i].mfc_cq_data1_RW); 3617c038749SMark Nutter csa->priv2.spuq[i].mfc_cq_data2_RW = 3627c038749SMark Nutter in_be64(&priv2->spuq[i].mfc_cq_data2_RW); 3637c038749SMark Nutter csa->priv2.spuq[i].mfc_cq_data3_RW = 3647c038749SMark Nutter in_be64(&priv2->spuq[i].mfc_cq_data3_RW); 3657c038749SMark Nutter } 3667c038749SMark Nutter } 3677c038749SMark Nutter } 3687c038749SMark Nutter 3697c038749SMark Nutter static inline void save_ppu_querymask(struct spu_state *csa, struct spu *spu) 3707c038749SMark Nutter { 3717c038749SMark Nutter struct spu_problem __iomem *prob = spu->problem; 3727c038749SMark Nutter 3737c038749SMark Nutter /* Save, Step 20: 3747c038749SMark Nutter * Save the PPU_QueryMask register 3757c038749SMark Nutter * in the CSA. 3767c038749SMark Nutter */ 3777c038749SMark Nutter csa->prob.dma_querymask_RW = in_be32(&prob->dma_querymask_RW); 3787c038749SMark Nutter } 3797c038749SMark Nutter 3807c038749SMark Nutter static inline void save_ppu_querytype(struct spu_state *csa, struct spu *spu) 3817c038749SMark Nutter { 3827c038749SMark Nutter struct spu_problem __iomem *prob = spu->problem; 3837c038749SMark Nutter 3847c038749SMark Nutter /* Save, Step 21: 3857c038749SMark Nutter * Save the PPU_QueryType register 3867c038749SMark Nutter * in the CSA. 3877c038749SMark Nutter */ 3887c038749SMark Nutter csa->prob.dma_querytype_RW = in_be32(&prob->dma_querytype_RW); 3897c038749SMark Nutter } 3907c038749SMark Nutter 3917c038749SMark Nutter static inline void save_mfc_csr_tsq(struct spu_state *csa, struct spu *spu) 3927c038749SMark Nutter { 3937c038749SMark Nutter struct spu_priv2 __iomem *priv2 = spu->priv2; 3947c038749SMark Nutter 3957c038749SMark Nutter /* Save, Step 22: 3967c038749SMark Nutter * Save the MFC_CSR_TSQ register 3977c038749SMark Nutter * in the LSCSA. 3987c038749SMark Nutter */ 3997c038749SMark Nutter csa->priv2.spu_tag_status_query_RW = 4007c038749SMark Nutter in_be64(&priv2->spu_tag_status_query_RW); 4017c038749SMark Nutter } 4027c038749SMark Nutter 4037c038749SMark Nutter static inline void save_mfc_csr_cmd(struct spu_state *csa, struct spu *spu) 4047c038749SMark Nutter { 4057c038749SMark Nutter struct spu_priv2 __iomem *priv2 = spu->priv2; 4067c038749SMark Nutter 4077c038749SMark Nutter /* Save, Step 23: 4087c038749SMark Nutter * Save the MFC_CSR_CMD1 and MFC_CSR_CMD2 4097c038749SMark Nutter * registers in the CSA. 4107c038749SMark Nutter */ 4117c038749SMark Nutter csa->priv2.spu_cmd_buf1_RW = in_be64(&priv2->spu_cmd_buf1_RW); 4127c038749SMark Nutter csa->priv2.spu_cmd_buf2_RW = in_be64(&priv2->spu_cmd_buf2_RW); 4137c038749SMark Nutter } 4147c038749SMark Nutter 4157c038749SMark Nutter static inline void save_mfc_csr_ato(struct spu_state *csa, struct spu *spu) 4167c038749SMark Nutter { 4177c038749SMark Nutter struct spu_priv2 __iomem *priv2 = spu->priv2; 4187c038749SMark Nutter 4197c038749SMark Nutter /* Save, Step 24: 4207c038749SMark Nutter * Save the MFC_CSR_ATO register in 4217c038749SMark Nutter * the CSA. 4227c038749SMark Nutter */ 4237c038749SMark Nutter csa->priv2.spu_atomic_status_RW = in_be64(&priv2->spu_atomic_status_RW); 4247c038749SMark Nutter } 4257c038749SMark Nutter 4267c038749SMark Nutter static inline void save_mfc_tclass_id(struct spu_state *csa, struct spu *spu) 4277c038749SMark Nutter { 4287c038749SMark Nutter /* Save, Step 25: 4297c038749SMark Nutter * Save the MFC_TCLASS_ID register in 4307c038749SMark Nutter * the CSA. 4317c038749SMark Nutter */ 432f0831accSArnd Bergmann csa->priv1.mfc_tclass_id_RW = spu_mfc_tclass_id_get(spu); 4337c038749SMark Nutter } 4347c038749SMark Nutter 4357c038749SMark Nutter static inline void set_mfc_tclass_id(struct spu_state *csa, struct spu *spu) 4367c038749SMark Nutter { 4377c038749SMark Nutter /* Save, Step 26: 4387c038749SMark Nutter * Restore, Step 23. 4397c038749SMark Nutter * Write the MFC_TCLASS_ID register with 4407c038749SMark Nutter * the value 0x10000000. 4417c038749SMark Nutter */ 442f0831accSArnd Bergmann spu_mfc_tclass_id_set(spu, 0x10000000); 4437c038749SMark Nutter eieio(); 4447c038749SMark Nutter } 4457c038749SMark Nutter 4467c038749SMark Nutter static inline void purge_mfc_queue(struct spu_state *csa, struct spu *spu) 4477c038749SMark Nutter { 4487c038749SMark Nutter struct spu_priv2 __iomem *priv2 = spu->priv2; 4497c038749SMark Nutter 4507c038749SMark Nutter /* Save, Step 27: 4517c038749SMark Nutter * Restore, Step 14. 4527c038749SMark Nutter * Write MFC_CNTL[Pc]=1 (purge queue). 4537c038749SMark Nutter */ 4547c038749SMark Nutter out_be64(&priv2->mfc_control_RW, MFC_CNTL_PURGE_DMA_REQUEST); 4557c038749SMark Nutter eieio(); 4567c038749SMark Nutter } 4577c038749SMark Nutter 4587c038749SMark Nutter static inline void wait_purge_complete(struct spu_state *csa, struct spu *spu) 4597c038749SMark Nutter { 4607c038749SMark Nutter struct spu_priv2 __iomem *priv2 = spu->priv2; 4617c038749SMark Nutter 4627c038749SMark Nutter /* Save, Step 28: 4637c038749SMark Nutter * Poll MFC_CNTL[Ps] until value '11' is read 4647c038749SMark Nutter * (purge complete). 4657c038749SMark Nutter */ 4667c038749SMark Nutter POLL_WHILE_FALSE(in_be64(&priv2->mfc_control_RW) & 4677c038749SMark Nutter MFC_CNTL_PURGE_DMA_COMPLETE); 4687c038749SMark Nutter } 4697c038749SMark Nutter 4707c038749SMark Nutter static inline void save_mfc_slbs(struct spu_state *csa, struct spu *spu) 4717c038749SMark Nutter { 4727c038749SMark Nutter struct spu_priv2 __iomem *priv2 = spu->priv2; 4737c038749SMark Nutter int i; 4747c038749SMark Nutter 4757c038749SMark Nutter /* Save, Step 29: 4767c038749SMark Nutter * If MFC_SR1[R]='1', save SLBs in CSA. 4777c038749SMark Nutter */ 478f0831accSArnd Bergmann if (spu_mfc_sr1_get(spu) & MFC_STATE1_RELOCATE_MASK) { 4797c038749SMark Nutter csa->priv2.slb_index_W = in_be64(&priv2->slb_index_W); 4807c038749SMark Nutter for (i = 0; i < 8; i++) { 4817c038749SMark Nutter out_be64(&priv2->slb_index_W, i); 4827c038749SMark Nutter eieio(); 4837c038749SMark Nutter csa->slb_esid_RW[i] = in_be64(&priv2->slb_esid_RW); 4847c038749SMark Nutter csa->slb_vsid_RW[i] = in_be64(&priv2->slb_vsid_RW); 4857c038749SMark Nutter eieio(); 4867c038749SMark Nutter } 4877c038749SMark Nutter } 4887c038749SMark Nutter } 4897c038749SMark Nutter 4907c038749SMark Nutter static inline void setup_mfc_sr1(struct spu_state *csa, struct spu *spu) 4917c038749SMark Nutter { 4927c038749SMark Nutter /* Save, Step 30: 4937c038749SMark Nutter * Restore, Step 18: 4947c038749SMark Nutter * Write MFC_SR1 with MFC_SR1[D=0,S=1] and 4957c038749SMark Nutter * MFC_SR1[TL,R,Pr,T] set correctly for the 4967c038749SMark Nutter * OS specific environment. 4977c038749SMark Nutter * 4987c038749SMark Nutter * Implementation note: The SPU-side code 4997c038749SMark Nutter * for save/restore is privileged, so the 5007c038749SMark Nutter * MFC_SR1[Pr] bit is not set. 5017c038749SMark Nutter * 5027c038749SMark Nutter */ 503f0831accSArnd Bergmann spu_mfc_sr1_set(spu, (MFC_STATE1_MASTER_RUN_CONTROL_MASK | 5047c038749SMark Nutter MFC_STATE1_RELOCATE_MASK | 5057c038749SMark Nutter MFC_STATE1_BUS_TLBIE_MASK)); 5067c038749SMark Nutter } 5077c038749SMark Nutter 5087c038749SMark Nutter static inline void save_spu_npc(struct spu_state *csa, struct spu *spu) 5097c038749SMark Nutter { 5107c038749SMark Nutter struct spu_problem __iomem *prob = spu->problem; 5117c038749SMark Nutter 5127c038749SMark Nutter /* Save, Step 31: 5137c038749SMark Nutter * Save SPU_NPC in the CSA. 5147c038749SMark Nutter */ 5157c038749SMark Nutter csa->prob.spu_npc_RW = in_be32(&prob->spu_npc_RW); 5167c038749SMark Nutter } 5177c038749SMark Nutter 5187c038749SMark Nutter static inline void save_spu_privcntl(struct spu_state *csa, struct spu *spu) 5197c038749SMark Nutter { 5207c038749SMark Nutter struct spu_priv2 __iomem *priv2 = spu->priv2; 5217c038749SMark Nutter 5227c038749SMark Nutter /* Save, Step 32: 5237c038749SMark Nutter * Save SPU_PrivCntl in the CSA. 5247c038749SMark Nutter */ 5257c038749SMark Nutter csa->priv2.spu_privcntl_RW = in_be64(&priv2->spu_privcntl_RW); 5267c038749SMark Nutter } 5277c038749SMark Nutter 5287c038749SMark Nutter static inline void reset_spu_privcntl(struct spu_state *csa, struct spu *spu) 5297c038749SMark Nutter { 5307c038749SMark Nutter struct spu_priv2 __iomem *priv2 = spu->priv2; 5317c038749SMark Nutter 5327c038749SMark Nutter /* Save, Step 33: 5337c038749SMark Nutter * Restore, Step 16: 5347c038749SMark Nutter * Write SPU_PrivCntl[S,Le,A] fields reset to 0. 5357c038749SMark Nutter */ 5367c038749SMark Nutter out_be64(&priv2->spu_privcntl_RW, 0UL); 5377c038749SMark Nutter eieio(); 5387c038749SMark Nutter } 5397c038749SMark Nutter 5407c038749SMark Nutter static inline void save_spu_lslr(struct spu_state *csa, struct spu *spu) 5417c038749SMark Nutter { 5427c038749SMark Nutter struct spu_priv2 __iomem *priv2 = spu->priv2; 5437c038749SMark Nutter 5447c038749SMark Nutter /* Save, Step 34: 5457c038749SMark Nutter * Save SPU_LSLR in the CSA. 5467c038749SMark Nutter */ 5477c038749SMark Nutter csa->priv2.spu_lslr_RW = in_be64(&priv2->spu_lslr_RW); 5487c038749SMark Nutter } 5497c038749SMark Nutter 5507c038749SMark Nutter static inline void reset_spu_lslr(struct spu_state *csa, struct spu *spu) 5517c038749SMark Nutter { 5527c038749SMark Nutter struct spu_priv2 __iomem *priv2 = spu->priv2; 5537c038749SMark Nutter 5547c038749SMark Nutter /* Save, Step 35: 5557c038749SMark Nutter * Restore, Step 17. 5567c038749SMark Nutter * Reset SPU_LSLR. 5577c038749SMark Nutter */ 5587c038749SMark Nutter out_be64(&priv2->spu_lslr_RW, LS_ADDR_MASK); 5597c038749SMark Nutter eieio(); 5607c038749SMark Nutter } 5617c038749SMark Nutter 5627c038749SMark Nutter static inline void save_spu_cfg(struct spu_state *csa, struct spu *spu) 5637c038749SMark Nutter { 5647c038749SMark Nutter struct spu_priv2 __iomem *priv2 = spu->priv2; 5657c038749SMark Nutter 5667c038749SMark Nutter /* Save, Step 36: 5677c038749SMark Nutter * Save SPU_Cfg in the CSA. 5687c038749SMark Nutter */ 5697c038749SMark Nutter csa->priv2.spu_cfg_RW = in_be64(&priv2->spu_cfg_RW); 5707c038749SMark Nutter } 5717c038749SMark Nutter 5727c038749SMark Nutter static inline void save_pm_trace(struct spu_state *csa, struct spu *spu) 5737c038749SMark Nutter { 5747c038749SMark Nutter /* Save, Step 37: 5757c038749SMark Nutter * Save PM_Trace_Tag_Wait_Mask in the CSA. 5767c038749SMark Nutter * Not performed by this implementation. 5777c038749SMark Nutter */ 5787c038749SMark Nutter } 5797c038749SMark Nutter 5807c038749SMark Nutter static inline void save_mfc_rag(struct spu_state *csa, struct spu *spu) 5817c038749SMark Nutter { 5827c038749SMark Nutter /* Save, Step 38: 5837c038749SMark Nutter * Save RA_GROUP_ID register and the 5847c038749SMark Nutter * RA_ENABLE reigster in the CSA. 5857c038749SMark Nutter */ 5867c038749SMark Nutter csa->priv1.resource_allocation_groupID_RW = 587f0831accSArnd Bergmann spu_resource_allocation_groupID_get(spu); 5887c038749SMark Nutter csa->priv1.resource_allocation_enable_RW = 589f0831accSArnd Bergmann spu_resource_allocation_enable_get(spu); 5907c038749SMark Nutter } 5917c038749SMark Nutter 5927c038749SMark Nutter static inline void save_ppu_mb_stat(struct spu_state *csa, struct spu *spu) 5937c038749SMark Nutter { 5947c038749SMark Nutter struct spu_problem __iomem *prob = spu->problem; 5957c038749SMark Nutter 5967c038749SMark Nutter /* Save, Step 39: 5977c038749SMark Nutter * Save MB_Stat register in the CSA. 5987c038749SMark Nutter */ 5997c038749SMark Nutter csa->prob.mb_stat_R = in_be32(&prob->mb_stat_R); 6007c038749SMark Nutter } 6017c038749SMark Nutter 6027c038749SMark Nutter static inline void save_ppu_mb(struct spu_state *csa, struct spu *spu) 6037c038749SMark Nutter { 6047c038749SMark Nutter struct spu_problem __iomem *prob = spu->problem; 6057c038749SMark Nutter 6067c038749SMark Nutter /* Save, Step 40: 6077c038749SMark Nutter * Save the PPU_MB register in the CSA. 6087c038749SMark Nutter */ 6097c038749SMark Nutter csa->prob.pu_mb_R = in_be32(&prob->pu_mb_R); 6107c038749SMark Nutter } 6117c038749SMark Nutter 6127c038749SMark Nutter static inline void save_ppuint_mb(struct spu_state *csa, struct spu *spu) 6137c038749SMark Nutter { 6147c038749SMark Nutter struct spu_priv2 __iomem *priv2 = spu->priv2; 6157c038749SMark Nutter 6167c038749SMark Nutter /* Save, Step 41: 6177c038749SMark Nutter * Save the PPUINT_MB register in the CSA. 6187c038749SMark Nutter */ 6197c038749SMark Nutter csa->priv2.puint_mb_R = in_be64(&priv2->puint_mb_R); 6207c038749SMark Nutter } 6217c038749SMark Nutter 6227c038749SMark Nutter static inline void save_ch_part1(struct spu_state *csa, struct spu *spu) 6237c038749SMark Nutter { 6247c038749SMark Nutter struct spu_priv2 __iomem *priv2 = spu->priv2; 625e46a0237Sarnd@arndb.de u64 idx, ch_indices[7] = { 0UL, 3UL, 4UL, 24UL, 25UL, 27UL }; 6267c038749SMark Nutter int i; 6277c038749SMark Nutter 6287c038749SMark Nutter /* Save, Step 42: 6297c038749SMark Nutter */ 630e46a0237Sarnd@arndb.de 631e46a0237Sarnd@arndb.de /* Save CH 1, without channel count */ 632e46a0237Sarnd@arndb.de out_be64(&priv2->spu_chnlcntptr_RW, 1); 633e46a0237Sarnd@arndb.de csa->spu_chnldata_RW[1] = in_be64(&priv2->spu_chnldata_RW); 634e46a0237Sarnd@arndb.de 635e46a0237Sarnd@arndb.de /* Save the following CH: [0,3,4,24,25,27] */ 6367c038749SMark Nutter for (i = 0; i < 7; i++) { 6377c038749SMark Nutter idx = ch_indices[i]; 6387c038749SMark Nutter out_be64(&priv2->spu_chnlcntptr_RW, idx); 6397c038749SMark Nutter eieio(); 6407c038749SMark Nutter csa->spu_chnldata_RW[idx] = in_be64(&priv2->spu_chnldata_RW); 6417c038749SMark Nutter csa->spu_chnlcnt_RW[idx] = in_be64(&priv2->spu_chnlcnt_RW); 6427c038749SMark Nutter out_be64(&priv2->spu_chnldata_RW, 0UL); 6437c038749SMark Nutter out_be64(&priv2->spu_chnlcnt_RW, 0UL); 6447c038749SMark Nutter eieio(); 6457c038749SMark Nutter } 6467c038749SMark Nutter } 6477c038749SMark Nutter 6487c038749SMark Nutter static inline void save_spu_mb(struct spu_state *csa, struct spu *spu) 6497c038749SMark Nutter { 6507c038749SMark Nutter struct spu_priv2 __iomem *priv2 = spu->priv2; 6517c038749SMark Nutter int i; 6527c038749SMark Nutter 6537c038749SMark Nutter /* Save, Step 43: 6547c038749SMark Nutter * Save SPU Read Mailbox Channel. 6557c038749SMark Nutter */ 6567c038749SMark Nutter out_be64(&priv2->spu_chnlcntptr_RW, 29UL); 6577c038749SMark Nutter eieio(); 6587c038749SMark Nutter csa->spu_chnlcnt_RW[29] = in_be64(&priv2->spu_chnlcnt_RW); 6597c038749SMark Nutter for (i = 0; i < 4; i++) { 6608b3d6663SArnd Bergmann csa->spu_mailbox_data[i] = in_be64(&priv2->spu_chnldata_RW); 6617c038749SMark Nutter } 6627c038749SMark Nutter out_be64(&priv2->spu_chnlcnt_RW, 0UL); 6637c038749SMark Nutter eieio(); 6647c038749SMark Nutter } 6657c038749SMark Nutter 6667c038749SMark Nutter static inline void save_mfc_cmd(struct spu_state *csa, struct spu *spu) 6677c038749SMark Nutter { 6687c038749SMark Nutter struct spu_priv2 __iomem *priv2 = spu->priv2; 6697c038749SMark Nutter 6707c038749SMark Nutter /* Save, Step 44: 6717c038749SMark Nutter * Save MFC_CMD Channel. 6727c038749SMark Nutter */ 6737c038749SMark Nutter out_be64(&priv2->spu_chnlcntptr_RW, 21UL); 6747c038749SMark Nutter eieio(); 6757c038749SMark Nutter csa->spu_chnlcnt_RW[21] = in_be64(&priv2->spu_chnlcnt_RW); 6767c038749SMark Nutter eieio(); 6777c038749SMark Nutter } 6787c038749SMark Nutter 6797c038749SMark Nutter static inline void reset_ch(struct spu_state *csa, struct spu *spu) 6807c038749SMark Nutter { 6817c038749SMark Nutter struct spu_priv2 __iomem *priv2 = spu->priv2; 6827c038749SMark Nutter u64 ch_indices[4] = { 21UL, 23UL, 28UL, 30UL }; 6837c038749SMark Nutter u64 ch_counts[4] = { 16UL, 1UL, 1UL, 1UL }; 6847c038749SMark Nutter u64 idx; 6857c038749SMark Nutter int i; 6867c038749SMark Nutter 6877c038749SMark Nutter /* Save, Step 45: 6887c038749SMark Nutter * Reset the following CH: [21, 23, 28, 30] 6897c038749SMark Nutter */ 6907c038749SMark Nutter for (i = 0; i < 4; i++) { 6917c038749SMark Nutter idx = ch_indices[i]; 6927c038749SMark Nutter out_be64(&priv2->spu_chnlcntptr_RW, idx); 6937c038749SMark Nutter eieio(); 6947c038749SMark Nutter out_be64(&priv2->spu_chnlcnt_RW, ch_counts[i]); 6957c038749SMark Nutter eieio(); 6967c038749SMark Nutter } 6977c038749SMark Nutter } 6987c038749SMark Nutter 6997c038749SMark Nutter static inline void resume_mfc_queue(struct spu_state *csa, struct spu *spu) 7007c038749SMark Nutter { 7017c038749SMark Nutter struct spu_priv2 __iomem *priv2 = spu->priv2; 7027c038749SMark Nutter 7037c038749SMark Nutter /* Save, Step 46: 7047c038749SMark Nutter * Restore, Step 25. 7057c038749SMark Nutter * Write MFC_CNTL[Sc]=0 (resume queue processing). 7067c038749SMark Nutter */ 7077c038749SMark Nutter out_be64(&priv2->mfc_control_RW, MFC_CNTL_RESUME_DMA_QUEUE); 7087c038749SMark Nutter } 7097c038749SMark Nutter 7107c038749SMark Nutter static inline void invalidate_slbs(struct spu_state *csa, struct spu *spu) 7117c038749SMark Nutter { 7127c038749SMark Nutter struct spu_priv2 __iomem *priv2 = spu->priv2; 7137c038749SMark Nutter 7147c038749SMark Nutter /* Save, Step 45: 7157c038749SMark Nutter * Restore, Step 19: 7167c038749SMark Nutter * If MFC_SR1[R]=1, write 0 to SLB_Invalidate_All. 7177c038749SMark Nutter */ 718f0831accSArnd Bergmann if (spu_mfc_sr1_get(spu) & MFC_STATE1_RELOCATE_MASK) { 7197c038749SMark Nutter out_be64(&priv2->slb_invalidate_all_W, 0UL); 7207c038749SMark Nutter eieio(); 7217c038749SMark Nutter } 7227c038749SMark Nutter } 7237c038749SMark Nutter 7247c038749SMark Nutter static inline void get_kernel_slb(u64 ea, u64 slb[2]) 7257c038749SMark Nutter { 726724bd80eSarnd@arndb.de u64 llp; 7277c038749SMark Nutter 728724bd80eSarnd@arndb.de if (REGION_ID(ea) == KERNEL_REGION_ID) 729724bd80eSarnd@arndb.de llp = mmu_psize_defs[mmu_linear_psize].sllp; 730724bd80eSarnd@arndb.de else 731724bd80eSarnd@arndb.de llp = mmu_psize_defs[mmu_virtual_psize].sllp; 732724bd80eSarnd@arndb.de slb[0] = (get_kernel_vsid(ea) << SLB_VSID_SHIFT) | 733724bd80eSarnd@arndb.de SLB_VSID_KERNEL | llp; 734724bd80eSarnd@arndb.de slb[1] = (ea & ESID_MASK) | SLB_ESID_V; 7357c038749SMark Nutter } 7367c038749SMark Nutter 7377c038749SMark Nutter static inline void load_mfc_slb(struct spu *spu, u64 slb[2], int slbe) 7387c038749SMark Nutter { 7397c038749SMark Nutter struct spu_priv2 __iomem *priv2 = spu->priv2; 7407c038749SMark Nutter 7417c038749SMark Nutter out_be64(&priv2->slb_index_W, slbe); 7427c038749SMark Nutter eieio(); 7437c038749SMark Nutter out_be64(&priv2->slb_vsid_RW, slb[0]); 7447c038749SMark Nutter out_be64(&priv2->slb_esid_RW, slb[1]); 7457c038749SMark Nutter eieio(); 7467c038749SMark Nutter } 7477c038749SMark Nutter 7487c038749SMark Nutter static inline void setup_mfc_slbs(struct spu_state *csa, struct spu *spu) 7497c038749SMark Nutter { 7507c038749SMark Nutter u64 code_slb[2]; 7517c038749SMark Nutter u64 lscsa_slb[2]; 7527c038749SMark Nutter 7537c038749SMark Nutter /* Save, Step 47: 7547c038749SMark Nutter * Restore, Step 30. 7557c038749SMark Nutter * If MFC_SR1[R]=1, write 0 to SLB_Invalidate_All 7567c038749SMark Nutter * register, then initialize SLB_VSID and SLB_ESID 7577c038749SMark Nutter * to provide access to SPU context save code and 7587c038749SMark Nutter * LSCSA. 7597c038749SMark Nutter * 7607c038749SMark Nutter * This implementation places both the context 7617c038749SMark Nutter * switch code and LSCSA in kernel address space. 7627c038749SMark Nutter * 7637c038749SMark Nutter * Further this implementation assumes that the 7647c038749SMark Nutter * MFC_SR1[R]=1 (in other words, assume that 7657c038749SMark Nutter * translation is desired by OS environment). 7667c038749SMark Nutter */ 7677c038749SMark Nutter invalidate_slbs(csa, spu); 7687c038749SMark Nutter get_kernel_slb((unsigned long)&spu_save_code[0], code_slb); 7697c038749SMark Nutter get_kernel_slb((unsigned long)csa->lscsa, lscsa_slb); 7707c038749SMark Nutter load_mfc_slb(spu, code_slb, 0); 7717c038749SMark Nutter if ((lscsa_slb[0] != code_slb[0]) || (lscsa_slb[1] != code_slb[1])) 7727c038749SMark Nutter load_mfc_slb(spu, lscsa_slb, 1); 7737c038749SMark Nutter } 7747c038749SMark Nutter 7757c038749SMark Nutter static inline void set_switch_active(struct spu_state *csa, struct spu *spu) 7767c038749SMark Nutter { 7777c038749SMark Nutter /* Save, Step 48: 7787c038749SMark Nutter * Restore, Step 23. 7797c038749SMark Nutter * Change the software context switch pending flag 7807c038749SMark Nutter * to context switch active. 7817c038749SMark Nutter */ 7828837d921SArnd Bergmann set_bit(SPU_CONTEXT_SWITCH_ACTIVE, &spu->flags); 7838837d921SArnd Bergmann clear_bit(SPU_CONTEXT_SWITCH_PENDING, &spu->flags); 7847c038749SMark Nutter mb(); 7857c038749SMark Nutter } 7867c038749SMark Nutter 7877c038749SMark Nutter static inline void enable_interrupts(struct spu_state *csa, struct spu *spu) 7887c038749SMark Nutter { 7897c038749SMark Nutter unsigned long class1_mask = CLASS1_ENABLE_SEGMENT_FAULT_INTR | 7907c038749SMark Nutter CLASS1_ENABLE_STORAGE_FAULT_INTR; 7917c038749SMark Nutter 7927c038749SMark Nutter /* Save, Step 49: 7937c038749SMark Nutter * Restore, Step 22: 7947c038749SMark Nutter * Reset and then enable interrupts, as 7957c038749SMark Nutter * needed by OS. 7967c038749SMark Nutter * 7977c038749SMark Nutter * This implementation enables only class1 7987c038749SMark Nutter * (translation) interrupts. 7997c038749SMark Nutter */ 8007c038749SMark Nutter spin_lock_irq(&spu->register_lock); 801f0831accSArnd Bergmann spu_int_stat_clear(spu, 0, ~0ul); 802f0831accSArnd Bergmann spu_int_stat_clear(spu, 1, ~0ul); 803f0831accSArnd Bergmann spu_int_stat_clear(spu, 2, ~0ul); 804f0831accSArnd Bergmann spu_int_mask_set(spu, 0, 0ul); 805f0831accSArnd Bergmann spu_int_mask_set(spu, 1, class1_mask); 806f0831accSArnd Bergmann spu_int_mask_set(spu, 2, 0ul); 8077c038749SMark Nutter spin_unlock_irq(&spu->register_lock); 8087c038749SMark Nutter } 8097c038749SMark Nutter 8107c038749SMark Nutter static inline int send_mfc_dma(struct spu *spu, unsigned long ea, 8117c038749SMark Nutter unsigned int ls_offset, unsigned int size, 8127c038749SMark Nutter unsigned int tag, unsigned int rclass, 8137c038749SMark Nutter unsigned int cmd) 8147c038749SMark Nutter { 8157c038749SMark Nutter struct spu_problem __iomem *prob = spu->problem; 8167c038749SMark Nutter union mfc_tag_size_class_cmd command; 8177c038749SMark Nutter unsigned int transfer_size; 8187c038749SMark Nutter volatile unsigned int status = 0x0; 8197c038749SMark Nutter 8207c038749SMark Nutter while (size > 0) { 8217c038749SMark Nutter transfer_size = 8227c038749SMark Nutter (size > MFC_MAX_DMA_SIZE) ? MFC_MAX_DMA_SIZE : size; 8237c038749SMark Nutter command.u.mfc_size = transfer_size; 8247c038749SMark Nutter command.u.mfc_tag = tag; 8257c038749SMark Nutter command.u.mfc_rclassid = rclass; 8267c038749SMark Nutter command.u.mfc_cmd = cmd; 8277c038749SMark Nutter do { 8287c038749SMark Nutter out_be32(&prob->mfc_lsa_W, ls_offset); 8297c038749SMark Nutter out_be64(&prob->mfc_ea_W, ea); 8307c038749SMark Nutter out_be64(&prob->mfc_union_W.all64, command.all64); 8317c038749SMark Nutter status = 8327c038749SMark Nutter in_be32(&prob->mfc_union_W.by32.mfc_class_cmd32); 8337c038749SMark Nutter if (unlikely(status & 0x2)) { 8347c038749SMark Nutter cpu_relax(); 8357c038749SMark Nutter } 8367c038749SMark Nutter } while (status & 0x3); 8377c038749SMark Nutter size -= transfer_size; 8387c038749SMark Nutter ea += transfer_size; 8397c038749SMark Nutter ls_offset += transfer_size; 8407c038749SMark Nutter } 8417c038749SMark Nutter return 0; 8427c038749SMark Nutter } 8437c038749SMark Nutter 8447c038749SMark Nutter static inline void save_ls_16kb(struct spu_state *csa, struct spu *spu) 8457c038749SMark Nutter { 8467c038749SMark Nutter unsigned long addr = (unsigned long)&csa->lscsa->ls[0]; 8477c038749SMark Nutter unsigned int ls_offset = 0x0; 8487c038749SMark Nutter unsigned int size = 16384; 8497c038749SMark Nutter unsigned int tag = 0; 8507c038749SMark Nutter unsigned int rclass = 0; 8517c038749SMark Nutter unsigned int cmd = MFC_PUT_CMD; 8527c038749SMark Nutter 8537c038749SMark Nutter /* Save, Step 50: 8547c038749SMark Nutter * Issue a DMA command to copy the first 16K bytes 8557c038749SMark Nutter * of local storage to the CSA. 8567c038749SMark Nutter */ 8577c038749SMark Nutter send_mfc_dma(spu, addr, ls_offset, size, tag, rclass, cmd); 8587c038749SMark Nutter } 8597c038749SMark Nutter 8607c038749SMark Nutter static inline void set_spu_npc(struct spu_state *csa, struct spu *spu) 8617c038749SMark Nutter { 8627c038749SMark Nutter struct spu_problem __iomem *prob = spu->problem; 8637c038749SMark Nutter 8647c038749SMark Nutter /* Save, Step 51: 8657c038749SMark Nutter * Restore, Step 31. 8667c038749SMark Nutter * Write SPU_NPC[IE]=0 and SPU_NPC[LSA] to entry 8677c038749SMark Nutter * point address of context save code in local 8687c038749SMark Nutter * storage. 8697c038749SMark Nutter * 8707c038749SMark Nutter * This implementation uses SPU-side save/restore 8717c038749SMark Nutter * programs with entry points at LSA of 0. 8727c038749SMark Nutter */ 8737c038749SMark Nutter out_be32(&prob->spu_npc_RW, 0); 8747c038749SMark Nutter eieio(); 8757c038749SMark Nutter } 8767c038749SMark Nutter 8777c038749SMark Nutter static inline void set_signot1(struct spu_state *csa, struct spu *spu) 8787c038749SMark Nutter { 8797c038749SMark Nutter struct spu_problem __iomem *prob = spu->problem; 8807c038749SMark Nutter union { 8817c038749SMark Nutter u64 ull; 8827c038749SMark Nutter u32 ui[2]; 8837c038749SMark Nutter } addr64; 8847c038749SMark Nutter 8857c038749SMark Nutter /* Save, Step 52: 8867c038749SMark Nutter * Restore, Step 32: 8877c038749SMark Nutter * Write SPU_Sig_Notify_1 register with upper 32-bits 8887c038749SMark Nutter * of the CSA.LSCSA effective address. 8897c038749SMark Nutter */ 8907c038749SMark Nutter addr64.ull = (u64) csa->lscsa; 8917c038749SMark Nutter out_be32(&prob->signal_notify1, addr64.ui[0]); 8927c038749SMark Nutter eieio(); 8937c038749SMark Nutter } 8947c038749SMark Nutter 8957c038749SMark Nutter static inline void set_signot2(struct spu_state *csa, struct spu *spu) 8967c038749SMark Nutter { 8977c038749SMark Nutter struct spu_problem __iomem *prob = spu->problem; 8987c038749SMark Nutter union { 8997c038749SMark Nutter u64 ull; 9007c038749SMark Nutter u32 ui[2]; 9017c038749SMark Nutter } addr64; 9027c038749SMark Nutter 9037c038749SMark Nutter /* Save, Step 53: 9047c038749SMark Nutter * Restore, Step 33: 9057c038749SMark Nutter * Write SPU_Sig_Notify_2 register with lower 32-bits 9067c038749SMark Nutter * of the CSA.LSCSA effective address. 9077c038749SMark Nutter */ 9087c038749SMark Nutter addr64.ull = (u64) csa->lscsa; 9097c038749SMark Nutter out_be32(&prob->signal_notify2, addr64.ui[1]); 9107c038749SMark Nutter eieio(); 9117c038749SMark Nutter } 9127c038749SMark Nutter 9137c038749SMark Nutter static inline void send_save_code(struct spu_state *csa, struct spu *spu) 9147c038749SMark Nutter { 9157c038749SMark Nutter unsigned long addr = (unsigned long)&spu_save_code[0]; 9167c038749SMark Nutter unsigned int ls_offset = 0x0; 9177c038749SMark Nutter unsigned int size = sizeof(spu_save_code); 9187c038749SMark Nutter unsigned int tag = 0; 9197c038749SMark Nutter unsigned int rclass = 0; 9207c038749SMark Nutter unsigned int cmd = MFC_GETFS_CMD; 9217c038749SMark Nutter 9227c038749SMark Nutter /* Save, Step 54: 9237c038749SMark Nutter * Issue a DMA command to copy context save code 9247c038749SMark Nutter * to local storage and start SPU. 9257c038749SMark Nutter */ 9267c038749SMark Nutter send_mfc_dma(spu, addr, ls_offset, size, tag, rclass, cmd); 9277c038749SMark Nutter } 9287c038749SMark Nutter 9297c038749SMark Nutter static inline void set_ppu_querymask(struct spu_state *csa, struct spu *spu) 9307c038749SMark Nutter { 9317c038749SMark Nutter struct spu_problem __iomem *prob = spu->problem; 9327c038749SMark Nutter 9337c038749SMark Nutter /* Save, Step 55: 9347c038749SMark Nutter * Restore, Step 38. 9357c038749SMark Nutter * Write PPU_QueryMask=1 (enable Tag Group 0) 9367c038749SMark Nutter * and issue eieio instruction. 9377c038749SMark Nutter */ 9387c038749SMark Nutter out_be32(&prob->dma_querymask_RW, MFC_TAGID_TO_TAGMASK(0)); 9397c038749SMark Nutter eieio(); 9407c038749SMark Nutter } 9417c038749SMark Nutter 9427c038749SMark Nutter static inline void wait_tag_complete(struct spu_state *csa, struct spu *spu) 9437c038749SMark Nutter { 9447c038749SMark Nutter struct spu_problem __iomem *prob = spu->problem; 9457c038749SMark Nutter u32 mask = MFC_TAGID_TO_TAGMASK(0); 9467c038749SMark Nutter unsigned long flags; 9477c038749SMark Nutter 9487c038749SMark Nutter /* Save, Step 56: 9497c038749SMark Nutter * Restore, Step 39. 9507c038749SMark Nutter * Restore, Step 39. 9517c038749SMark Nutter * Restore, Step 46. 9527c038749SMark Nutter * Poll PPU_TagStatus[gn] until 01 (Tag group 0 complete) 9537c038749SMark Nutter * or write PPU_QueryType[TS]=01 and wait for Tag Group 9547c038749SMark Nutter * Complete Interrupt. Write INT_Stat_Class0 or 9557c038749SMark Nutter * INT_Stat_Class2 with value of 'handled'. 9567c038749SMark Nutter */ 9577c038749SMark Nutter POLL_WHILE_FALSE(in_be32(&prob->dma_tagstatus_R) & mask); 9587c038749SMark Nutter 9597c038749SMark Nutter local_irq_save(flags); 960f0831accSArnd Bergmann spu_int_stat_clear(spu, 0, ~(0ul)); 961f0831accSArnd Bergmann spu_int_stat_clear(spu, 2, ~(0ul)); 9627c038749SMark Nutter local_irq_restore(flags); 9637c038749SMark Nutter } 9647c038749SMark Nutter 9657c038749SMark Nutter static inline void wait_spu_stopped(struct spu_state *csa, struct spu *spu) 9667c038749SMark Nutter { 9677c038749SMark Nutter struct spu_problem __iomem *prob = spu->problem; 9687c038749SMark Nutter unsigned long flags; 9697c038749SMark Nutter 9707c038749SMark Nutter /* Save, Step 57: 9717c038749SMark Nutter * Restore, Step 40. 9727c038749SMark Nutter * Poll until SPU_Status[R]=0 or wait for SPU Class 0 9737c038749SMark Nutter * or SPU Class 2 interrupt. Write INT_Stat_class0 9747c038749SMark Nutter * or INT_Stat_class2 with value of handled. 9757c038749SMark Nutter */ 9767c038749SMark Nutter POLL_WHILE_TRUE(in_be32(&prob->spu_status_R) & SPU_STATUS_RUNNING); 9777c038749SMark Nutter 9787c038749SMark Nutter local_irq_save(flags); 979f0831accSArnd Bergmann spu_int_stat_clear(spu, 0, ~(0ul)); 980f0831accSArnd Bergmann spu_int_stat_clear(spu, 2, ~(0ul)); 9817c038749SMark Nutter local_irq_restore(flags); 9827c038749SMark Nutter } 9837c038749SMark Nutter 9847c038749SMark Nutter static inline int check_save_status(struct spu_state *csa, struct spu *spu) 9857c038749SMark Nutter { 9867c038749SMark Nutter struct spu_problem __iomem *prob = spu->problem; 9877c038749SMark Nutter u32 complete; 9887c038749SMark Nutter 9897c038749SMark Nutter /* Save, Step 54: 9907c038749SMark Nutter * If SPU_Status[P]=1 and SPU_Status[SC] = "success", 9917c038749SMark Nutter * context save succeeded, otherwise context save 9927c038749SMark Nutter * failed. 9937c038749SMark Nutter */ 9947c038749SMark Nutter complete = ((SPU_SAVE_COMPLETE << SPU_STOP_STATUS_SHIFT) | 9957c038749SMark Nutter SPU_STATUS_STOPPED_BY_STOP); 9967c038749SMark Nutter return (in_be32(&prob->spu_status_R) != complete) ? 1 : 0; 9977c038749SMark Nutter } 9987c038749SMark Nutter 9997c038749SMark Nutter static inline void terminate_spu_app(struct spu_state *csa, struct spu *spu) 10007c038749SMark Nutter { 10017c038749SMark Nutter /* Restore, Step 4: 10027c038749SMark Nutter * If required, notify the "using application" that 10037c038749SMark Nutter * the SPU task has been terminated. TBD. 10047c038749SMark Nutter */ 10057c038749SMark Nutter } 10067c038749SMark Nutter 10077c038749SMark Nutter static inline void suspend_mfc(struct spu_state *csa, struct spu *spu) 10087c038749SMark Nutter { 10097c038749SMark Nutter struct spu_priv2 __iomem *priv2 = spu->priv2; 10107c038749SMark Nutter 10117c038749SMark Nutter /* Restore, Step 7: 10127c038749SMark Nutter * Restore, Step 47. 10137c038749SMark Nutter * Write MFC_Cntl[Dh,Sc]='1','1' to suspend 10147c038749SMark Nutter * the queue and halt the decrementer. 10157c038749SMark Nutter */ 10167c038749SMark Nutter out_be64(&priv2->mfc_control_RW, MFC_CNTL_SUSPEND_DMA_QUEUE | 10177c038749SMark Nutter MFC_CNTL_DECREMENTER_HALTED); 10187c038749SMark Nutter eieio(); 10197c038749SMark Nutter } 10207c038749SMark Nutter 10217c038749SMark Nutter static inline void wait_suspend_mfc_complete(struct spu_state *csa, 10227c038749SMark Nutter struct spu *spu) 10237c038749SMark Nutter { 10247c038749SMark Nutter struct spu_priv2 __iomem *priv2 = spu->priv2; 10257c038749SMark Nutter 10267c038749SMark Nutter /* Restore, Step 8: 10277c038749SMark Nutter * Restore, Step 47. 10287c038749SMark Nutter * Poll MFC_CNTL[Ss] until 11 is returned. 10297c038749SMark Nutter */ 10307c038749SMark Nutter POLL_WHILE_FALSE(in_be64(&priv2->mfc_control_RW) & 10317c038749SMark Nutter MFC_CNTL_SUSPEND_COMPLETE); 10327c038749SMark Nutter } 10337c038749SMark Nutter 10347c038749SMark Nutter static inline int suspend_spe(struct spu_state *csa, struct spu *spu) 10357c038749SMark Nutter { 10367c038749SMark Nutter struct spu_problem __iomem *prob = spu->problem; 10377c038749SMark Nutter 10387c038749SMark Nutter /* Restore, Step 9: 10397c038749SMark Nutter * If SPU_Status[R]=1, stop SPU execution 10407c038749SMark Nutter * and wait for stop to complete. 10417c038749SMark Nutter * 10427c038749SMark Nutter * Returns 1 if SPU_Status[R]=1 on entry. 10437c038749SMark Nutter * 0 otherwise 10447c038749SMark Nutter */ 10457c038749SMark Nutter if (in_be32(&prob->spu_status_R) & SPU_STATUS_RUNNING) { 10467c038749SMark Nutter if (in_be32(&prob->spu_status_R) & 10477c038749SMark Nutter SPU_STATUS_ISOLATED_EXIT_STAUTUS) { 10487c038749SMark Nutter POLL_WHILE_TRUE(in_be32(&prob->spu_status_R) & 10497c038749SMark Nutter SPU_STATUS_RUNNING); 10507c038749SMark Nutter } 10517c038749SMark Nutter if ((in_be32(&prob->spu_status_R) & 10527c038749SMark Nutter SPU_STATUS_ISOLATED_LOAD_STAUTUS) 10537c038749SMark Nutter || (in_be32(&prob->spu_status_R) & 10547c038749SMark Nutter SPU_STATUS_ISOLATED_STATE)) { 10557c038749SMark Nutter out_be32(&prob->spu_runcntl_RW, SPU_RUNCNTL_STOP); 10567c038749SMark Nutter eieio(); 10577c038749SMark Nutter POLL_WHILE_TRUE(in_be32(&prob->spu_status_R) & 10587c038749SMark Nutter SPU_STATUS_RUNNING); 10597c038749SMark Nutter out_be32(&prob->spu_runcntl_RW, 0x2); 10607c038749SMark Nutter eieio(); 10617c038749SMark Nutter POLL_WHILE_TRUE(in_be32(&prob->spu_status_R) & 10627c038749SMark Nutter SPU_STATUS_RUNNING); 10637c038749SMark Nutter } 10647c038749SMark Nutter if (in_be32(&prob->spu_status_R) & 10657c038749SMark Nutter SPU_STATUS_WAITING_FOR_CHANNEL) { 10667c038749SMark Nutter out_be32(&prob->spu_runcntl_RW, SPU_RUNCNTL_STOP); 10677c038749SMark Nutter eieio(); 10687c038749SMark Nutter POLL_WHILE_TRUE(in_be32(&prob->spu_status_R) & 10697c038749SMark Nutter SPU_STATUS_RUNNING); 10707c038749SMark Nutter } 10717c038749SMark Nutter return 1; 10727c038749SMark Nutter } 10737c038749SMark Nutter return 0; 10747c038749SMark Nutter } 10757c038749SMark Nutter 10767c038749SMark Nutter static inline void clear_spu_status(struct spu_state *csa, struct spu *spu) 10777c038749SMark Nutter { 10787c038749SMark Nutter struct spu_problem __iomem *prob = spu->problem; 10797c038749SMark Nutter 10807c038749SMark Nutter /* Restore, Step 10: 10817c038749SMark Nutter * If SPU_Status[R]=0 and SPU_Status[E,L,IS]=1, 10827c038749SMark Nutter * release SPU from isolate state. 10837c038749SMark Nutter */ 10847c038749SMark Nutter if (!(in_be32(&prob->spu_status_R) & SPU_STATUS_RUNNING)) { 10857c038749SMark Nutter if (in_be32(&prob->spu_status_R) & 10867c038749SMark Nutter SPU_STATUS_ISOLATED_EXIT_STAUTUS) { 1087f0831accSArnd Bergmann spu_mfc_sr1_set(spu, 10887c038749SMark Nutter MFC_STATE1_MASTER_RUN_CONTROL_MASK); 10897c038749SMark Nutter eieio(); 10907c038749SMark Nutter out_be32(&prob->spu_runcntl_RW, SPU_RUNCNTL_RUNNABLE); 10917c038749SMark Nutter eieio(); 10927c038749SMark Nutter POLL_WHILE_TRUE(in_be32(&prob->spu_status_R) & 10937c038749SMark Nutter SPU_STATUS_RUNNING); 10947c038749SMark Nutter } 10957c038749SMark Nutter if ((in_be32(&prob->spu_status_R) & 10967c038749SMark Nutter SPU_STATUS_ISOLATED_LOAD_STAUTUS) 10977c038749SMark Nutter || (in_be32(&prob->spu_status_R) & 10987c038749SMark Nutter SPU_STATUS_ISOLATED_STATE)) { 1099f0831accSArnd Bergmann spu_mfc_sr1_set(spu, 11007c038749SMark Nutter MFC_STATE1_MASTER_RUN_CONTROL_MASK); 11017c038749SMark Nutter eieio(); 11027c038749SMark Nutter out_be32(&prob->spu_runcntl_RW, 0x2); 11037c038749SMark Nutter eieio(); 11047c038749SMark Nutter POLL_WHILE_TRUE(in_be32(&prob->spu_status_R) & 11057c038749SMark Nutter SPU_STATUS_RUNNING); 11067c038749SMark Nutter } 11077c038749SMark Nutter } 11087c038749SMark Nutter } 11097c038749SMark Nutter 11107c038749SMark Nutter static inline void reset_ch_part1(struct spu_state *csa, struct spu *spu) 11117c038749SMark Nutter { 11127c038749SMark Nutter struct spu_priv2 __iomem *priv2 = spu->priv2; 1113e46a0237Sarnd@arndb.de u64 ch_indices[7] = { 0UL, 3UL, 4UL, 24UL, 25UL, 27UL }; 11147c038749SMark Nutter u64 idx; 11157c038749SMark Nutter int i; 11167c038749SMark Nutter 11177c038749SMark Nutter /* Restore, Step 20: 11187c038749SMark Nutter */ 1119e46a0237Sarnd@arndb.de 1120e46a0237Sarnd@arndb.de /* Reset CH 1 */ 1121e46a0237Sarnd@arndb.de out_be64(&priv2->spu_chnlcntptr_RW, 1); 1122e46a0237Sarnd@arndb.de out_be64(&priv2->spu_chnldata_RW, 0UL); 1123e46a0237Sarnd@arndb.de 1124e46a0237Sarnd@arndb.de /* Reset the following CH: [0,3,4,24,25,27] */ 11257c038749SMark Nutter for (i = 0; i < 7; i++) { 11267c038749SMark Nutter idx = ch_indices[i]; 11277c038749SMark Nutter out_be64(&priv2->spu_chnlcntptr_RW, idx); 11287c038749SMark Nutter eieio(); 11297c038749SMark Nutter out_be64(&priv2->spu_chnldata_RW, 0UL); 11307c038749SMark Nutter out_be64(&priv2->spu_chnlcnt_RW, 0UL); 11317c038749SMark Nutter eieio(); 11327c038749SMark Nutter } 11337c038749SMark Nutter } 11347c038749SMark Nutter 11357c038749SMark Nutter static inline void reset_ch_part2(struct spu_state *csa, struct spu *spu) 11367c038749SMark Nutter { 11377c038749SMark Nutter struct spu_priv2 __iomem *priv2 = spu->priv2; 11387c038749SMark Nutter u64 ch_indices[5] = { 21UL, 23UL, 28UL, 29UL, 30UL }; 11397c038749SMark Nutter u64 ch_counts[5] = { 16UL, 1UL, 1UL, 0UL, 1UL }; 11407c038749SMark Nutter u64 idx; 11417c038749SMark Nutter int i; 11427c038749SMark Nutter 11437c038749SMark Nutter /* Restore, Step 21: 11447c038749SMark Nutter * Reset the following CH: [21, 23, 28, 29, 30] 11457c038749SMark Nutter */ 11467c038749SMark Nutter for (i = 0; i < 5; i++) { 11477c038749SMark Nutter idx = ch_indices[i]; 11487c038749SMark Nutter out_be64(&priv2->spu_chnlcntptr_RW, idx); 11497c038749SMark Nutter eieio(); 11507c038749SMark Nutter out_be64(&priv2->spu_chnlcnt_RW, ch_counts[i]); 11517c038749SMark Nutter eieio(); 11527c038749SMark Nutter } 11537c038749SMark Nutter } 11547c038749SMark Nutter 11557c038749SMark Nutter static inline void setup_spu_status_part1(struct spu_state *csa, 11567c038749SMark Nutter struct spu *spu) 11577c038749SMark Nutter { 11587c038749SMark Nutter u32 status_P = SPU_STATUS_STOPPED_BY_STOP; 11597c038749SMark Nutter u32 status_I = SPU_STATUS_INVALID_INSTR; 11607c038749SMark Nutter u32 status_H = SPU_STATUS_STOPPED_BY_HALT; 11617c038749SMark Nutter u32 status_S = SPU_STATUS_SINGLE_STEP; 11627c038749SMark Nutter u32 status_S_I = SPU_STATUS_SINGLE_STEP | SPU_STATUS_INVALID_INSTR; 11637c038749SMark Nutter u32 status_S_P = SPU_STATUS_SINGLE_STEP | SPU_STATUS_STOPPED_BY_STOP; 11647c038749SMark Nutter u32 status_P_H = SPU_STATUS_STOPPED_BY_HALT |SPU_STATUS_STOPPED_BY_STOP; 11657c038749SMark Nutter u32 status_P_I = SPU_STATUS_STOPPED_BY_STOP |SPU_STATUS_INVALID_INSTR; 11667c038749SMark Nutter u32 status_code; 11677c038749SMark Nutter 11687c038749SMark Nutter /* Restore, Step 27: 11697c038749SMark Nutter * If the CSA.SPU_Status[I,S,H,P]=1 then add the correct 11707c038749SMark Nutter * instruction sequence to the end of the SPU based restore 11717c038749SMark Nutter * code (after the "context restored" stop and signal) to 11727c038749SMark Nutter * restore the correct SPU status. 11737c038749SMark Nutter * 11747c038749SMark Nutter * NOTE: Rather than modifying the SPU executable, we 11757c038749SMark Nutter * instead add a new 'stopped_status' field to the 11767c038749SMark Nutter * LSCSA. The SPU-side restore reads this field and 11777c038749SMark Nutter * takes the appropriate action when exiting. 11787c038749SMark Nutter */ 11797c038749SMark Nutter 11807c038749SMark Nutter status_code = 11817c038749SMark Nutter (csa->prob.spu_status_R >> SPU_STOP_STATUS_SHIFT) & 0xFFFF; 11827c038749SMark Nutter if ((csa->prob.spu_status_R & status_P_I) == status_P_I) { 11837c038749SMark Nutter 11847c038749SMark Nutter /* SPU_Status[P,I]=1 - Illegal Instruction followed 11857c038749SMark Nutter * by Stop and Signal instruction, followed by 'br -4'. 11867c038749SMark Nutter * 11877c038749SMark Nutter */ 11887c038749SMark Nutter csa->lscsa->stopped_status.slot[0] = SPU_STOPPED_STATUS_P_I; 11897c038749SMark Nutter csa->lscsa->stopped_status.slot[1] = status_code; 11907c038749SMark Nutter 11917c038749SMark Nutter } else if ((csa->prob.spu_status_R & status_P_H) == status_P_H) { 11927c038749SMark Nutter 11937c038749SMark Nutter /* SPU_Status[P,H]=1 - Halt Conditional, followed 11947c038749SMark Nutter * by Stop and Signal instruction, followed by 11957c038749SMark Nutter * 'br -4'. 11967c038749SMark Nutter */ 11977c038749SMark Nutter csa->lscsa->stopped_status.slot[0] = SPU_STOPPED_STATUS_P_H; 11987c038749SMark Nutter csa->lscsa->stopped_status.slot[1] = status_code; 11997c038749SMark Nutter 12007c038749SMark Nutter } else if ((csa->prob.spu_status_R & status_S_P) == status_S_P) { 12017c038749SMark Nutter 12027c038749SMark Nutter /* SPU_Status[S,P]=1 - Stop and Signal instruction 12037c038749SMark Nutter * followed by 'br -4'. 12047c038749SMark Nutter */ 12057c038749SMark Nutter csa->lscsa->stopped_status.slot[0] = SPU_STOPPED_STATUS_S_P; 12067c038749SMark Nutter csa->lscsa->stopped_status.slot[1] = status_code; 12077c038749SMark Nutter 12087c038749SMark Nutter } else if ((csa->prob.spu_status_R & status_S_I) == status_S_I) { 12097c038749SMark Nutter 12107c038749SMark Nutter /* SPU_Status[S,I]=1 - Illegal instruction followed 12117c038749SMark Nutter * by 'br -4'. 12127c038749SMark Nutter */ 12137c038749SMark Nutter csa->lscsa->stopped_status.slot[0] = SPU_STOPPED_STATUS_S_I; 12147c038749SMark Nutter csa->lscsa->stopped_status.slot[1] = status_code; 12157c038749SMark Nutter 12167c038749SMark Nutter } else if ((csa->prob.spu_status_R & status_P) == status_P) { 12177c038749SMark Nutter 12187c038749SMark Nutter /* SPU_Status[P]=1 - Stop and Signal instruction 12197c038749SMark Nutter * followed by 'br -4'. 12207c038749SMark Nutter */ 12217c038749SMark Nutter csa->lscsa->stopped_status.slot[0] = SPU_STOPPED_STATUS_P; 12227c038749SMark Nutter csa->lscsa->stopped_status.slot[1] = status_code; 12237c038749SMark Nutter 12247c038749SMark Nutter } else if ((csa->prob.spu_status_R & status_H) == status_H) { 12257c038749SMark Nutter 12267c038749SMark Nutter /* SPU_Status[H]=1 - Halt Conditional, followed 12277c038749SMark Nutter * by 'br -4'. 12287c038749SMark Nutter */ 12297c038749SMark Nutter csa->lscsa->stopped_status.slot[0] = SPU_STOPPED_STATUS_H; 12307c038749SMark Nutter 12317c038749SMark Nutter } else if ((csa->prob.spu_status_R & status_S) == status_S) { 12327c038749SMark Nutter 12337c038749SMark Nutter /* SPU_Status[S]=1 - Two nop instructions. 12347c038749SMark Nutter */ 12357c038749SMark Nutter csa->lscsa->stopped_status.slot[0] = SPU_STOPPED_STATUS_S; 12367c038749SMark Nutter 12377c038749SMark Nutter } else if ((csa->prob.spu_status_R & status_I) == status_I) { 12387c038749SMark Nutter 12397c038749SMark Nutter /* SPU_Status[I]=1 - Illegal instruction followed 12407c038749SMark Nutter * by 'br -4'. 12417c038749SMark Nutter */ 12427c038749SMark Nutter csa->lscsa->stopped_status.slot[0] = SPU_STOPPED_STATUS_I; 12437c038749SMark Nutter 12447c038749SMark Nutter } 12457c038749SMark Nutter } 12467c038749SMark Nutter 12477c038749SMark Nutter static inline void setup_spu_status_part2(struct spu_state *csa, 12487c038749SMark Nutter struct spu *spu) 12497c038749SMark Nutter { 12507c038749SMark Nutter u32 mask; 12517c038749SMark Nutter 12527c038749SMark Nutter /* Restore, Step 28: 12537c038749SMark Nutter * If the CSA.SPU_Status[I,S,H,P,R]=0 then 12547c038749SMark Nutter * add a 'br *' instruction to the end of 12557c038749SMark Nutter * the SPU based restore code. 12567c038749SMark Nutter * 12577c038749SMark Nutter * NOTE: Rather than modifying the SPU executable, we 12587c038749SMark Nutter * instead add a new 'stopped_status' field to the 12597c038749SMark Nutter * LSCSA. The SPU-side restore reads this field and 12607c038749SMark Nutter * takes the appropriate action when exiting. 12617c038749SMark Nutter */ 12627c038749SMark Nutter mask = SPU_STATUS_INVALID_INSTR | 12637c038749SMark Nutter SPU_STATUS_SINGLE_STEP | 12647c038749SMark Nutter SPU_STATUS_STOPPED_BY_HALT | 12657c038749SMark Nutter SPU_STATUS_STOPPED_BY_STOP | SPU_STATUS_RUNNING; 12667c038749SMark Nutter if (!(csa->prob.spu_status_R & mask)) { 12677c038749SMark Nutter csa->lscsa->stopped_status.slot[0] = SPU_STOPPED_STATUS_R; 12687c038749SMark Nutter } 12697c038749SMark Nutter } 12707c038749SMark Nutter 12717c038749SMark Nutter static inline void restore_mfc_rag(struct spu_state *csa, struct spu *spu) 12727c038749SMark Nutter { 12737c038749SMark Nutter /* Restore, Step 29: 12747c038749SMark Nutter * Restore RA_GROUP_ID register and the 12757c038749SMark Nutter * RA_ENABLE reigster from the CSA. 12767c038749SMark Nutter */ 1277f0831accSArnd Bergmann spu_resource_allocation_groupID_set(spu, 12787c038749SMark Nutter csa->priv1.resource_allocation_groupID_RW); 1279f0831accSArnd Bergmann spu_resource_allocation_enable_set(spu, 12807c038749SMark Nutter csa->priv1.resource_allocation_enable_RW); 12817c038749SMark Nutter } 12827c038749SMark Nutter 12837c038749SMark Nutter static inline void send_restore_code(struct spu_state *csa, struct spu *spu) 12847c038749SMark Nutter { 12857c038749SMark Nutter unsigned long addr = (unsigned long)&spu_restore_code[0]; 12867c038749SMark Nutter unsigned int ls_offset = 0x0; 12877c038749SMark Nutter unsigned int size = sizeof(spu_restore_code); 12887c038749SMark Nutter unsigned int tag = 0; 12897c038749SMark Nutter unsigned int rclass = 0; 12907c038749SMark Nutter unsigned int cmd = MFC_GETFS_CMD; 12917c038749SMark Nutter 12927c038749SMark Nutter /* Restore, Step 37: 12937c038749SMark Nutter * Issue MFC DMA command to copy context 12947c038749SMark Nutter * restore code to local storage. 12957c038749SMark Nutter */ 12967c038749SMark Nutter send_mfc_dma(spu, addr, ls_offset, size, tag, rclass, cmd); 12977c038749SMark Nutter } 12987c038749SMark Nutter 12997c038749SMark Nutter static inline void setup_decr(struct spu_state *csa, struct spu *spu) 13007c038749SMark Nutter { 13017c038749SMark Nutter /* Restore, Step 34: 13027c038749SMark Nutter * If CSA.MFC_CNTL[Ds]=1 (decrementer was 13037c038749SMark Nutter * running) then adjust decrementer, set 13047c038749SMark Nutter * decrementer running status in LSCSA, 13057c038749SMark Nutter * and set decrementer "wrapped" status 13067c038749SMark Nutter * in LSCSA. 13077c038749SMark Nutter */ 13087c038749SMark Nutter if (csa->priv2.mfc_control_RW & MFC_CNTL_DECREMENTER_RUNNING) { 13097c038749SMark Nutter cycles_t resume_time = get_cycles(); 13107c038749SMark Nutter cycles_t delta_time = resume_time - csa->suspend_time; 13117c038749SMark Nutter 1312183b73aeSJordi Caubet csa->lscsa->decr.slot[0] -= delta_time; 13137c038749SMark Nutter } 13147c038749SMark Nutter } 13157c038749SMark Nutter 13167c038749SMark Nutter static inline void setup_ppu_mb(struct spu_state *csa, struct spu *spu) 13177c038749SMark Nutter { 13187c038749SMark Nutter /* Restore, Step 35: 13197c038749SMark Nutter * Copy the CSA.PU_MB data into the LSCSA. 13207c038749SMark Nutter */ 13217c038749SMark Nutter csa->lscsa->ppu_mb.slot[0] = csa->prob.pu_mb_R; 13227c038749SMark Nutter } 13237c038749SMark Nutter 13247c038749SMark Nutter static inline void setup_ppuint_mb(struct spu_state *csa, struct spu *spu) 13257c038749SMark Nutter { 13267c038749SMark Nutter /* Restore, Step 36: 13277c038749SMark Nutter * Copy the CSA.PUINT_MB data into the LSCSA. 13287c038749SMark Nutter */ 13297c038749SMark Nutter csa->lscsa->ppuint_mb.slot[0] = csa->priv2.puint_mb_R; 13307c038749SMark Nutter } 13317c038749SMark Nutter 13327c038749SMark Nutter static inline int check_restore_status(struct spu_state *csa, struct spu *spu) 13337c038749SMark Nutter { 13347c038749SMark Nutter struct spu_problem __iomem *prob = spu->problem; 13357c038749SMark Nutter u32 complete; 13367c038749SMark Nutter 13377c038749SMark Nutter /* Restore, Step 40: 13387c038749SMark Nutter * If SPU_Status[P]=1 and SPU_Status[SC] = "success", 13397c038749SMark Nutter * context restore succeeded, otherwise context restore 13407c038749SMark Nutter * failed. 13417c038749SMark Nutter */ 13427c038749SMark Nutter complete = ((SPU_RESTORE_COMPLETE << SPU_STOP_STATUS_SHIFT) | 13437c038749SMark Nutter SPU_STATUS_STOPPED_BY_STOP); 13447c038749SMark Nutter return (in_be32(&prob->spu_status_R) != complete) ? 1 : 0; 13457c038749SMark Nutter } 13467c038749SMark Nutter 13477c038749SMark Nutter static inline void restore_spu_privcntl(struct spu_state *csa, struct spu *spu) 13487c038749SMark Nutter { 13497c038749SMark Nutter struct spu_priv2 __iomem *priv2 = spu->priv2; 13507c038749SMark Nutter 13517c038749SMark Nutter /* Restore, Step 41: 13527c038749SMark Nutter * Restore SPU_PrivCntl from the CSA. 13537c038749SMark Nutter */ 13547c038749SMark Nutter out_be64(&priv2->spu_privcntl_RW, csa->priv2.spu_privcntl_RW); 13557c038749SMark Nutter eieio(); 13567c038749SMark Nutter } 13577c038749SMark Nutter 13587c038749SMark Nutter static inline void restore_status_part1(struct spu_state *csa, struct spu *spu) 13597c038749SMark Nutter { 13607c038749SMark Nutter struct spu_problem __iomem *prob = spu->problem; 13617c038749SMark Nutter u32 mask; 13627c038749SMark Nutter 13637c038749SMark Nutter /* Restore, Step 42: 13647c038749SMark Nutter * If any CSA.SPU_Status[I,S,H,P]=1, then 13657c038749SMark Nutter * restore the error or single step state. 13667c038749SMark Nutter */ 13677c038749SMark Nutter mask = SPU_STATUS_INVALID_INSTR | 13687c038749SMark Nutter SPU_STATUS_SINGLE_STEP | 13697c038749SMark Nutter SPU_STATUS_STOPPED_BY_HALT | SPU_STATUS_STOPPED_BY_STOP; 13707c038749SMark Nutter if (csa->prob.spu_status_R & mask) { 13717c038749SMark Nutter out_be32(&prob->spu_runcntl_RW, SPU_RUNCNTL_RUNNABLE); 13727c038749SMark Nutter eieio(); 13737c038749SMark Nutter POLL_WHILE_TRUE(in_be32(&prob->spu_status_R) & 13747c038749SMark Nutter SPU_STATUS_RUNNING); 13757c038749SMark Nutter } 13767c038749SMark Nutter } 13777c038749SMark Nutter 13787c038749SMark Nutter static inline void restore_status_part2(struct spu_state *csa, struct spu *spu) 13797c038749SMark Nutter { 13807c038749SMark Nutter struct spu_problem __iomem *prob = spu->problem; 13817c038749SMark Nutter u32 mask; 13827c038749SMark Nutter 13837c038749SMark Nutter /* Restore, Step 43: 13847c038749SMark Nutter * If all CSA.SPU_Status[I,S,H,P,R]=0 then write 13857c038749SMark Nutter * SPU_RunCntl[R0R1]='01', wait for SPU_Status[R]=1, 13867c038749SMark Nutter * then write '00' to SPU_RunCntl[R0R1] and wait 13877c038749SMark Nutter * for SPU_Status[R]=0. 13887c038749SMark Nutter */ 13897c038749SMark Nutter mask = SPU_STATUS_INVALID_INSTR | 13907c038749SMark Nutter SPU_STATUS_SINGLE_STEP | 13917c038749SMark Nutter SPU_STATUS_STOPPED_BY_HALT | 13927c038749SMark Nutter SPU_STATUS_STOPPED_BY_STOP | SPU_STATUS_RUNNING; 13937c038749SMark Nutter if (!(csa->prob.spu_status_R & mask)) { 13947c038749SMark Nutter out_be32(&prob->spu_runcntl_RW, SPU_RUNCNTL_RUNNABLE); 13957c038749SMark Nutter eieio(); 13967c038749SMark Nutter POLL_WHILE_FALSE(in_be32(&prob->spu_status_R) & 13977c038749SMark Nutter SPU_STATUS_RUNNING); 13987c038749SMark Nutter out_be32(&prob->spu_runcntl_RW, SPU_RUNCNTL_STOP); 13997c038749SMark Nutter eieio(); 14007c038749SMark Nutter POLL_WHILE_TRUE(in_be32(&prob->spu_status_R) & 14017c038749SMark Nutter SPU_STATUS_RUNNING); 14027c038749SMark Nutter } 14037c038749SMark Nutter } 14047c038749SMark Nutter 14057c038749SMark Nutter static inline void restore_ls_16kb(struct spu_state *csa, struct spu *spu) 14067c038749SMark Nutter { 14077c038749SMark Nutter unsigned long addr = (unsigned long)&csa->lscsa->ls[0]; 14087c038749SMark Nutter unsigned int ls_offset = 0x0; 14097c038749SMark Nutter unsigned int size = 16384; 14107c038749SMark Nutter unsigned int tag = 0; 14117c038749SMark Nutter unsigned int rclass = 0; 14127c038749SMark Nutter unsigned int cmd = MFC_GET_CMD; 14137c038749SMark Nutter 14147c038749SMark Nutter /* Restore, Step 44: 14157c038749SMark Nutter * Issue a DMA command to restore the first 14167c038749SMark Nutter * 16kb of local storage from CSA. 14177c038749SMark Nutter */ 14187c038749SMark Nutter send_mfc_dma(spu, addr, ls_offset, size, tag, rclass, cmd); 14197c038749SMark Nutter } 14207c038749SMark Nutter 14217c038749SMark Nutter static inline void clear_interrupts(struct spu_state *csa, struct spu *spu) 14227c038749SMark Nutter { 14237c038749SMark Nutter /* Restore, Step 49: 14247c038749SMark Nutter * Write INT_MASK_class0 with value of 0. 14257c038749SMark Nutter * Write INT_MASK_class1 with value of 0. 14267c038749SMark Nutter * Write INT_MASK_class2 with value of 0. 14277c038749SMark Nutter * Write INT_STAT_class0 with value of -1. 14287c038749SMark Nutter * Write INT_STAT_class1 with value of -1. 14297c038749SMark Nutter * Write INT_STAT_class2 with value of -1. 14307c038749SMark Nutter */ 14317c038749SMark Nutter spin_lock_irq(&spu->register_lock); 1432f0831accSArnd Bergmann spu_int_mask_set(spu, 0, 0ul); 1433f0831accSArnd Bergmann spu_int_mask_set(spu, 1, 0ul); 1434f0831accSArnd Bergmann spu_int_mask_set(spu, 2, 0ul); 1435f0831accSArnd Bergmann spu_int_stat_clear(spu, 0, ~0ul); 1436f0831accSArnd Bergmann spu_int_stat_clear(spu, 1, ~0ul); 1437f0831accSArnd Bergmann spu_int_stat_clear(spu, 2, ~0ul); 14387c038749SMark Nutter spin_unlock_irq(&spu->register_lock); 14397c038749SMark Nutter } 14407c038749SMark Nutter 14417c038749SMark Nutter static inline void restore_mfc_queues(struct spu_state *csa, struct spu *spu) 14427c038749SMark Nutter { 14437c038749SMark Nutter struct spu_priv2 __iomem *priv2 = spu->priv2; 14447c038749SMark Nutter int i; 14457c038749SMark Nutter 14467c038749SMark Nutter /* Restore, Step 50: 14477c038749SMark Nutter * If MFC_Cntl[Se]!=0 then restore 14487c038749SMark Nutter * MFC command queues. 14497c038749SMark Nutter */ 14507c038749SMark Nutter if ((csa->priv2.mfc_control_RW & MFC_CNTL_DMA_QUEUES_EMPTY_MASK) == 0) { 14517c038749SMark Nutter for (i = 0; i < 8; i++) { 14527c038749SMark Nutter out_be64(&priv2->puq[i].mfc_cq_data0_RW, 14537c038749SMark Nutter csa->priv2.puq[i].mfc_cq_data0_RW); 14547c038749SMark Nutter out_be64(&priv2->puq[i].mfc_cq_data1_RW, 14557c038749SMark Nutter csa->priv2.puq[i].mfc_cq_data1_RW); 14567c038749SMark Nutter out_be64(&priv2->puq[i].mfc_cq_data2_RW, 14577c038749SMark Nutter csa->priv2.puq[i].mfc_cq_data2_RW); 14587c038749SMark Nutter out_be64(&priv2->puq[i].mfc_cq_data3_RW, 14597c038749SMark Nutter csa->priv2.puq[i].mfc_cq_data3_RW); 14607c038749SMark Nutter } 14617c038749SMark Nutter for (i = 0; i < 16; i++) { 14627c038749SMark Nutter out_be64(&priv2->spuq[i].mfc_cq_data0_RW, 14637c038749SMark Nutter csa->priv2.spuq[i].mfc_cq_data0_RW); 14647c038749SMark Nutter out_be64(&priv2->spuq[i].mfc_cq_data1_RW, 14657c038749SMark Nutter csa->priv2.spuq[i].mfc_cq_data1_RW); 14667c038749SMark Nutter out_be64(&priv2->spuq[i].mfc_cq_data2_RW, 14677c038749SMark Nutter csa->priv2.spuq[i].mfc_cq_data2_RW); 14687c038749SMark Nutter out_be64(&priv2->spuq[i].mfc_cq_data3_RW, 14697c038749SMark Nutter csa->priv2.spuq[i].mfc_cq_data3_RW); 14707c038749SMark Nutter } 14717c038749SMark Nutter } 14727c038749SMark Nutter eieio(); 14737c038749SMark Nutter } 14747c038749SMark Nutter 14757c038749SMark Nutter static inline void restore_ppu_querymask(struct spu_state *csa, struct spu *spu) 14767c038749SMark Nutter { 14777c038749SMark Nutter struct spu_problem __iomem *prob = spu->problem; 14787c038749SMark Nutter 14797c038749SMark Nutter /* Restore, Step 51: 14807c038749SMark Nutter * Restore the PPU_QueryMask register from CSA. 14817c038749SMark Nutter */ 14827c038749SMark Nutter out_be32(&prob->dma_querymask_RW, csa->prob.dma_querymask_RW); 14837c038749SMark Nutter eieio(); 14847c038749SMark Nutter } 14857c038749SMark Nutter 14867c038749SMark Nutter static inline void restore_ppu_querytype(struct spu_state *csa, struct spu *spu) 14877c038749SMark Nutter { 14887c038749SMark Nutter struct spu_problem __iomem *prob = spu->problem; 14897c038749SMark Nutter 14907c038749SMark Nutter /* Restore, Step 52: 14917c038749SMark Nutter * Restore the PPU_QueryType register from CSA. 14927c038749SMark Nutter */ 14937c038749SMark Nutter out_be32(&prob->dma_querytype_RW, csa->prob.dma_querytype_RW); 14947c038749SMark Nutter eieio(); 14957c038749SMark Nutter } 14967c038749SMark Nutter 14977c038749SMark Nutter static inline void restore_mfc_csr_tsq(struct spu_state *csa, struct spu *spu) 14987c038749SMark Nutter { 14997c038749SMark Nutter struct spu_priv2 __iomem *priv2 = spu->priv2; 15007c038749SMark Nutter 15017c038749SMark Nutter /* Restore, Step 53: 15027c038749SMark Nutter * Restore the MFC_CSR_TSQ register from CSA. 15037c038749SMark Nutter */ 15047c038749SMark Nutter out_be64(&priv2->spu_tag_status_query_RW, 15057c038749SMark Nutter csa->priv2.spu_tag_status_query_RW); 15067c038749SMark Nutter eieio(); 15077c038749SMark Nutter } 15087c038749SMark Nutter 15097c038749SMark Nutter static inline void restore_mfc_csr_cmd(struct spu_state *csa, struct spu *spu) 15107c038749SMark Nutter { 15117c038749SMark Nutter struct spu_priv2 __iomem *priv2 = spu->priv2; 15127c038749SMark Nutter 15137c038749SMark Nutter /* Restore, Step 54: 15147c038749SMark Nutter * Restore the MFC_CSR_CMD1 and MFC_CSR_CMD2 15157c038749SMark Nutter * registers from CSA. 15167c038749SMark Nutter */ 15177c038749SMark Nutter out_be64(&priv2->spu_cmd_buf1_RW, csa->priv2.spu_cmd_buf1_RW); 15187c038749SMark Nutter out_be64(&priv2->spu_cmd_buf2_RW, csa->priv2.spu_cmd_buf2_RW); 15197c038749SMark Nutter eieio(); 15207c038749SMark Nutter } 15217c038749SMark Nutter 15227c038749SMark Nutter static inline void restore_mfc_csr_ato(struct spu_state *csa, struct spu *spu) 15237c038749SMark Nutter { 15247c038749SMark Nutter struct spu_priv2 __iomem *priv2 = spu->priv2; 15257c038749SMark Nutter 15267c038749SMark Nutter /* Restore, Step 55: 15277c038749SMark Nutter * Restore the MFC_CSR_ATO register from CSA. 15287c038749SMark Nutter */ 15297c038749SMark Nutter out_be64(&priv2->spu_atomic_status_RW, csa->priv2.spu_atomic_status_RW); 15307c038749SMark Nutter } 15317c038749SMark Nutter 15327c038749SMark Nutter static inline void restore_mfc_tclass_id(struct spu_state *csa, struct spu *spu) 15337c038749SMark Nutter { 15347c038749SMark Nutter /* Restore, Step 56: 15357c038749SMark Nutter * Restore the MFC_TCLASS_ID register from CSA. 15367c038749SMark Nutter */ 1537f0831accSArnd Bergmann spu_mfc_tclass_id_set(spu, csa->priv1.mfc_tclass_id_RW); 15387c038749SMark Nutter eieio(); 15397c038749SMark Nutter } 15407c038749SMark Nutter 15417c038749SMark Nutter static inline void set_llr_event(struct spu_state *csa, struct spu *spu) 15427c038749SMark Nutter { 15437c038749SMark Nutter u64 ch0_cnt, ch0_data; 15447c038749SMark Nutter u64 ch1_data; 15457c038749SMark Nutter 15467c038749SMark Nutter /* Restore, Step 57: 15477c038749SMark Nutter * Set the Lock Line Reservation Lost Event by: 15487c038749SMark Nutter * 1. OR CSA.SPU_Event_Status with bit 21 (Lr) set to 1. 15497c038749SMark Nutter * 2. If CSA.SPU_Channel_0_Count=0 and 15507c038749SMark Nutter * CSA.SPU_Wr_Event_Mask[Lr]=1 and 15517c038749SMark Nutter * CSA.SPU_Event_Status[Lr]=0 then set 15527c038749SMark Nutter * CSA.SPU_Event_Status_Count=1. 15537c038749SMark Nutter */ 15547c038749SMark Nutter ch0_cnt = csa->spu_chnlcnt_RW[0]; 15557c038749SMark Nutter ch0_data = csa->spu_chnldata_RW[0]; 15567c038749SMark Nutter ch1_data = csa->spu_chnldata_RW[1]; 15577c038749SMark Nutter csa->spu_chnldata_RW[0] |= MFC_LLR_LOST_EVENT; 15587c038749SMark Nutter if ((ch0_cnt == 0) && !(ch0_data & MFC_LLR_LOST_EVENT) && 15597c038749SMark Nutter (ch1_data & MFC_LLR_LOST_EVENT)) { 15607c038749SMark Nutter csa->spu_chnlcnt_RW[0] = 1; 15617c038749SMark Nutter } 15627c038749SMark Nutter } 15637c038749SMark Nutter 15647c038749SMark Nutter static inline void restore_decr_wrapped(struct spu_state *csa, struct spu *spu) 15657c038749SMark Nutter { 15667c038749SMark Nutter /* Restore, Step 58: 15677c038749SMark Nutter * If the status of the CSA software decrementer 15687c038749SMark Nutter * "wrapped" flag is set, OR in a '1' to 15697c038749SMark Nutter * CSA.SPU_Event_Status[Tm]. 15707c038749SMark Nutter */ 15717c038749SMark Nutter if (csa->lscsa->decr_status.slot[0] == 1) { 15727c038749SMark Nutter csa->spu_chnldata_RW[0] |= 0x20; 15737c038749SMark Nutter } 15747c038749SMark Nutter if ((csa->lscsa->decr_status.slot[0] == 1) && 15757c038749SMark Nutter (csa->spu_chnlcnt_RW[0] == 0 && 15767c038749SMark Nutter ((csa->spu_chnldata_RW[2] & 0x20) == 0x0) && 15777c038749SMark Nutter ((csa->spu_chnldata_RW[0] & 0x20) != 0x1))) { 15787c038749SMark Nutter csa->spu_chnlcnt_RW[0] = 1; 15797c038749SMark Nutter } 15807c038749SMark Nutter } 15817c038749SMark Nutter 15827c038749SMark Nutter static inline void restore_ch_part1(struct spu_state *csa, struct spu *spu) 15837c038749SMark Nutter { 15847c038749SMark Nutter struct spu_priv2 __iomem *priv2 = spu->priv2; 1585e46a0237Sarnd@arndb.de u64 idx, ch_indices[7] = { 0UL, 3UL, 4UL, 24UL, 25UL, 27UL }; 15867c038749SMark Nutter int i; 15877c038749SMark Nutter 15887c038749SMark Nutter /* Restore, Step 59: 15897c038749SMark Nutter */ 1590e46a0237Sarnd@arndb.de 1591e46a0237Sarnd@arndb.de /* Restore CH 1 without count */ 1592e46a0237Sarnd@arndb.de out_be64(&priv2->spu_chnlcntptr_RW, 1); 1593e46a0237Sarnd@arndb.de out_be64(&priv2->spu_chnldata_RW, csa->spu_chnldata_RW[1]); 1594e46a0237Sarnd@arndb.de 1595e46a0237Sarnd@arndb.de /* Restore the following CH: [0,3,4,24,25,27] */ 15967c038749SMark Nutter for (i = 0; i < 7; i++) { 15977c038749SMark Nutter idx = ch_indices[i]; 15987c038749SMark Nutter out_be64(&priv2->spu_chnlcntptr_RW, idx); 15997c038749SMark Nutter eieio(); 16007c038749SMark Nutter out_be64(&priv2->spu_chnldata_RW, csa->spu_chnldata_RW[idx]); 16017c038749SMark Nutter out_be64(&priv2->spu_chnlcnt_RW, csa->spu_chnlcnt_RW[idx]); 16027c038749SMark Nutter eieio(); 16037c038749SMark Nutter } 16047c038749SMark Nutter } 16057c038749SMark Nutter 16067c038749SMark Nutter static inline void restore_ch_part2(struct spu_state *csa, struct spu *spu) 16077c038749SMark Nutter { 16087c038749SMark Nutter struct spu_priv2 __iomem *priv2 = spu->priv2; 16097c038749SMark Nutter u64 ch_indices[3] = { 9UL, 21UL, 23UL }; 16107c038749SMark Nutter u64 ch_counts[3] = { 1UL, 16UL, 1UL }; 16117c038749SMark Nutter u64 idx; 16127c038749SMark Nutter int i; 16137c038749SMark Nutter 16147c038749SMark Nutter /* Restore, Step 60: 16157c038749SMark Nutter * Restore the following CH: [9,21,23]. 16167c038749SMark Nutter */ 16177c038749SMark Nutter ch_counts[0] = 1UL; 16187c038749SMark Nutter ch_counts[1] = csa->spu_chnlcnt_RW[21]; 16197c038749SMark Nutter ch_counts[2] = 1UL; 16207c038749SMark Nutter for (i = 0; i < 3; i++) { 16217c038749SMark Nutter idx = ch_indices[i]; 16227c038749SMark Nutter out_be64(&priv2->spu_chnlcntptr_RW, idx); 16237c038749SMark Nutter eieio(); 16247c038749SMark Nutter out_be64(&priv2->spu_chnlcnt_RW, ch_counts[i]); 16257c038749SMark Nutter eieio(); 16267c038749SMark Nutter } 16277c038749SMark Nutter } 16287c038749SMark Nutter 16297c038749SMark Nutter static inline void restore_spu_lslr(struct spu_state *csa, struct spu *spu) 16307c038749SMark Nutter { 16317c038749SMark Nutter struct spu_priv2 __iomem *priv2 = spu->priv2; 16327c038749SMark Nutter 16337c038749SMark Nutter /* Restore, Step 61: 16347c038749SMark Nutter * Restore the SPU_LSLR register from CSA. 16357c038749SMark Nutter */ 16367c038749SMark Nutter out_be64(&priv2->spu_lslr_RW, csa->priv2.spu_lslr_RW); 16377c038749SMark Nutter eieio(); 16387c038749SMark Nutter } 16397c038749SMark Nutter 16407c038749SMark Nutter static inline void restore_spu_cfg(struct spu_state *csa, struct spu *spu) 16417c038749SMark Nutter { 16427c038749SMark Nutter struct spu_priv2 __iomem *priv2 = spu->priv2; 16437c038749SMark Nutter 16447c038749SMark Nutter /* Restore, Step 62: 16457c038749SMark Nutter * Restore the SPU_Cfg register from CSA. 16467c038749SMark Nutter */ 16477c038749SMark Nutter out_be64(&priv2->spu_cfg_RW, csa->priv2.spu_cfg_RW); 16487c038749SMark Nutter eieio(); 16497c038749SMark Nutter } 16507c038749SMark Nutter 16517c038749SMark Nutter static inline void restore_pm_trace(struct spu_state *csa, struct spu *spu) 16527c038749SMark Nutter { 16537c038749SMark Nutter /* Restore, Step 63: 16547c038749SMark Nutter * Restore PM_Trace_Tag_Wait_Mask from CSA. 16557c038749SMark Nutter * Not performed by this implementation. 16567c038749SMark Nutter */ 16577c038749SMark Nutter } 16587c038749SMark Nutter 16597c038749SMark Nutter static inline void restore_spu_npc(struct spu_state *csa, struct spu *spu) 16607c038749SMark Nutter { 16617c038749SMark Nutter struct spu_problem __iomem *prob = spu->problem; 16627c038749SMark Nutter 16637c038749SMark Nutter /* Restore, Step 64: 16647c038749SMark Nutter * Restore SPU_NPC from CSA. 16657c038749SMark Nutter */ 16667c038749SMark Nutter out_be32(&prob->spu_npc_RW, csa->prob.spu_npc_RW); 16677c038749SMark Nutter eieio(); 16687c038749SMark Nutter } 16697c038749SMark Nutter 16707c038749SMark Nutter static inline void restore_spu_mb(struct spu_state *csa, struct spu *spu) 16717c038749SMark Nutter { 16727c038749SMark Nutter struct spu_priv2 __iomem *priv2 = spu->priv2; 16737c038749SMark Nutter int i; 16747c038749SMark Nutter 16757c038749SMark Nutter /* Restore, Step 65: 16767c038749SMark Nutter * Restore MFC_RdSPU_MB from CSA. 16777c038749SMark Nutter */ 16787c038749SMark Nutter out_be64(&priv2->spu_chnlcntptr_RW, 29UL); 16797c038749SMark Nutter eieio(); 16807c038749SMark Nutter out_be64(&priv2->spu_chnlcnt_RW, csa->spu_chnlcnt_RW[29]); 16817c038749SMark Nutter for (i = 0; i < 4; i++) { 16828b3d6663SArnd Bergmann out_be64(&priv2->spu_chnldata_RW, csa->spu_mailbox_data[i]); 16837c038749SMark Nutter } 16847c038749SMark Nutter eieio(); 16857c038749SMark Nutter } 16867c038749SMark Nutter 16877c038749SMark Nutter static inline void check_ppu_mb_stat(struct spu_state *csa, struct spu *spu) 16887c038749SMark Nutter { 16897c038749SMark Nutter struct spu_problem __iomem *prob = spu->problem; 16907c038749SMark Nutter u32 dummy = 0; 16917c038749SMark Nutter 16927c038749SMark Nutter /* Restore, Step 66: 16937c038749SMark Nutter * If CSA.MB_Stat[P]=0 (mailbox empty) then 16947c038749SMark Nutter * read from the PPU_MB register. 16957c038749SMark Nutter */ 16967c038749SMark Nutter if ((csa->prob.mb_stat_R & 0xFF) == 0) { 16977c038749SMark Nutter dummy = in_be32(&prob->pu_mb_R); 16987c038749SMark Nutter eieio(); 16997c038749SMark Nutter } 17007c038749SMark Nutter } 17017c038749SMark Nutter 17027c038749SMark Nutter static inline void check_ppuint_mb_stat(struct spu_state *csa, struct spu *spu) 17037c038749SMark Nutter { 17047c038749SMark Nutter struct spu_priv2 __iomem *priv2 = spu->priv2; 17057c038749SMark Nutter u64 dummy = 0UL; 17067c038749SMark Nutter 17077c038749SMark Nutter /* Restore, Step 66: 17087c038749SMark Nutter * If CSA.MB_Stat[I]=0 (mailbox empty) then 17097c038749SMark Nutter * read from the PPUINT_MB register. 17107c038749SMark Nutter */ 17117c038749SMark Nutter if ((csa->prob.mb_stat_R & 0xFF0000) == 0) { 17127c038749SMark Nutter dummy = in_be64(&priv2->puint_mb_R); 17137c038749SMark Nutter eieio(); 1714f0831accSArnd Bergmann spu_int_stat_clear(spu, 2, CLASS2_ENABLE_MAILBOX_INTR); 17157c038749SMark Nutter eieio(); 17167c038749SMark Nutter } 17177c038749SMark Nutter } 17187c038749SMark Nutter 17197c038749SMark Nutter static inline void restore_mfc_slbs(struct spu_state *csa, struct spu *spu) 17207c038749SMark Nutter { 17217c038749SMark Nutter struct spu_priv2 __iomem *priv2 = spu->priv2; 17227c038749SMark Nutter int i; 17237c038749SMark Nutter 17247c038749SMark Nutter /* Restore, Step 68: 17257c038749SMark Nutter * If MFC_SR1[R]='1', restore SLBs from CSA. 17267c038749SMark Nutter */ 17277c038749SMark Nutter if (csa->priv1.mfc_sr1_RW & MFC_STATE1_RELOCATE_MASK) { 17287c038749SMark Nutter for (i = 0; i < 8; i++) { 17297c038749SMark Nutter out_be64(&priv2->slb_index_W, i); 17307c038749SMark Nutter eieio(); 17317c038749SMark Nutter out_be64(&priv2->slb_esid_RW, csa->slb_esid_RW[i]); 17327c038749SMark Nutter out_be64(&priv2->slb_vsid_RW, csa->slb_vsid_RW[i]); 17337c038749SMark Nutter eieio(); 17347c038749SMark Nutter } 17357c038749SMark Nutter out_be64(&priv2->slb_index_W, csa->priv2.slb_index_W); 17367c038749SMark Nutter eieio(); 17377c038749SMark Nutter } 17387c038749SMark Nutter } 17397c038749SMark Nutter 17407c038749SMark Nutter static inline void restore_mfc_sr1(struct spu_state *csa, struct spu *spu) 17417c038749SMark Nutter { 17427c038749SMark Nutter /* Restore, Step 69: 17437c038749SMark Nutter * Restore the MFC_SR1 register from CSA. 17447c038749SMark Nutter */ 1745f0831accSArnd Bergmann spu_mfc_sr1_set(spu, csa->priv1.mfc_sr1_RW); 17467c038749SMark Nutter eieio(); 17477c038749SMark Nutter } 17487c038749SMark Nutter 17497c038749SMark Nutter static inline void restore_other_spu_access(struct spu_state *csa, 17507c038749SMark Nutter struct spu *spu) 17517c038749SMark Nutter { 17527c038749SMark Nutter /* Restore, Step 70: 17537c038749SMark Nutter * Restore other SPU mappings to this SPU. TBD. 17547c038749SMark Nutter */ 17557c038749SMark Nutter } 17567c038749SMark Nutter 17577c038749SMark Nutter static inline void restore_spu_runcntl(struct spu_state *csa, struct spu *spu) 17587c038749SMark Nutter { 17597c038749SMark Nutter struct spu_problem __iomem *prob = spu->problem; 17607c038749SMark Nutter 17617c038749SMark Nutter /* Restore, Step 71: 17627c038749SMark Nutter * If CSA.SPU_Status[R]=1 then write 17637c038749SMark Nutter * SPU_RunCntl[R0R1]='01'. 17647c038749SMark Nutter */ 17657c038749SMark Nutter if (csa->prob.spu_status_R & SPU_STATUS_RUNNING) { 17667c038749SMark Nutter out_be32(&prob->spu_runcntl_RW, SPU_RUNCNTL_RUNNABLE); 17677c038749SMark Nutter eieio(); 17687c038749SMark Nutter } 17697c038749SMark Nutter } 17707c038749SMark Nutter 17717c038749SMark Nutter static inline void restore_mfc_cntl(struct spu_state *csa, struct spu *spu) 17727c038749SMark Nutter { 17737c038749SMark Nutter struct spu_priv2 __iomem *priv2 = spu->priv2; 17747c038749SMark Nutter 17757c038749SMark Nutter /* Restore, Step 72: 17767c038749SMark Nutter * Restore the MFC_CNTL register for the CSA. 17777c038749SMark Nutter */ 17787c038749SMark Nutter out_be64(&priv2->mfc_control_RW, csa->priv2.mfc_control_RW); 17797c038749SMark Nutter eieio(); 17807c038749SMark Nutter } 17817c038749SMark Nutter 17827c038749SMark Nutter static inline void enable_user_access(struct spu_state *csa, struct spu *spu) 17837c038749SMark Nutter { 17847c038749SMark Nutter /* Restore, Step 73: 17857c038749SMark Nutter * Enable user-space access (if provided) to this 17867c038749SMark Nutter * SPU by mapping the virtual pages assigned to 17877c038749SMark Nutter * the SPU memory-mapped I/O (MMIO) for problem 17887c038749SMark Nutter * state. TBD. 17897c038749SMark Nutter */ 17907c038749SMark Nutter } 17917c038749SMark Nutter 17927c038749SMark Nutter static inline void reset_switch_active(struct spu_state *csa, struct spu *spu) 17937c038749SMark Nutter { 17947c038749SMark Nutter /* Restore, Step 74: 17957c038749SMark Nutter * Reset the "context switch active" flag. 17967c038749SMark Nutter */ 17978837d921SArnd Bergmann clear_bit(SPU_CONTEXT_SWITCH_ACTIVE, &spu->flags); 17987c038749SMark Nutter mb(); 17997c038749SMark Nutter } 18007c038749SMark Nutter 18017c038749SMark Nutter static inline void reenable_interrupts(struct spu_state *csa, struct spu *spu) 18027c038749SMark Nutter { 18037c038749SMark Nutter /* Restore, Step 75: 18047c038749SMark Nutter * Re-enable SPU interrupts. 18057c038749SMark Nutter */ 18067c038749SMark Nutter spin_lock_irq(&spu->register_lock); 1807f0831accSArnd Bergmann spu_int_mask_set(spu, 0, csa->priv1.int_mask_class0_RW); 1808f0831accSArnd Bergmann spu_int_mask_set(spu, 1, csa->priv1.int_mask_class1_RW); 1809f0831accSArnd Bergmann spu_int_mask_set(spu, 2, csa->priv1.int_mask_class2_RW); 18107c038749SMark Nutter spin_unlock_irq(&spu->register_lock); 18117c038749SMark Nutter } 18127c038749SMark Nutter 18137c038749SMark Nutter static int quiece_spu(struct spu_state *prev, struct spu *spu) 18147c038749SMark Nutter { 18157c038749SMark Nutter /* 18167c038749SMark Nutter * Combined steps 2-18 of SPU context save sequence, which 18177c038749SMark Nutter * quiesce the SPU state (disable SPU execution, MFC command 18187c038749SMark Nutter * queues, decrementer, SPU interrupts, etc.). 18197c038749SMark Nutter * 18207c038749SMark Nutter * Returns 0 on success. 18217c038749SMark Nutter * 2 if failed step 2. 18227c038749SMark Nutter * 6 if failed step 6. 18237c038749SMark Nutter */ 18247c038749SMark Nutter 18257c038749SMark Nutter if (check_spu_isolate(prev, spu)) { /* Step 2. */ 18267c038749SMark Nutter return 2; 18277c038749SMark Nutter } 18287c038749SMark Nutter disable_interrupts(prev, spu); /* Step 3. */ 18297c038749SMark Nutter set_watchdog_timer(prev, spu); /* Step 4. */ 18307c038749SMark Nutter inhibit_user_access(prev, spu); /* Step 5. */ 18317c038749SMark Nutter if (check_spu_isolate(prev, spu)) { /* Step 6. */ 18327c038749SMark Nutter return 6; 18337c038749SMark Nutter } 18347c038749SMark Nutter set_switch_pending(prev, spu); /* Step 7. */ 18357c038749SMark Nutter save_mfc_cntl(prev, spu); /* Step 8. */ 18367c038749SMark Nutter save_spu_runcntl(prev, spu); /* Step 9. */ 18377c038749SMark Nutter save_mfc_sr1(prev, spu); /* Step 10. */ 18387c038749SMark Nutter save_spu_status(prev, spu); /* Step 11. */ 18397c038749SMark Nutter save_mfc_decr(prev, spu); /* Step 12. */ 18407c038749SMark Nutter halt_mfc_decr(prev, spu); /* Step 13. */ 18417c038749SMark Nutter save_timebase(prev, spu); /* Step 14. */ 18427c038749SMark Nutter remove_other_spu_access(prev, spu); /* Step 15. */ 18437c038749SMark Nutter do_mfc_mssync(prev, spu); /* Step 16. */ 18447c038749SMark Nutter issue_mfc_tlbie(prev, spu); /* Step 17. */ 18457c038749SMark Nutter handle_pending_interrupts(prev, spu); /* Step 18. */ 18467c038749SMark Nutter 18477c038749SMark Nutter return 0; 18487c038749SMark Nutter } 18497c038749SMark Nutter 18507c038749SMark Nutter static void save_csa(struct spu_state *prev, struct spu *spu) 18517c038749SMark Nutter { 18527c038749SMark Nutter /* 18537c038749SMark Nutter * Combine steps 19-44 of SPU context save sequence, which 18547c038749SMark Nutter * save regions of the privileged & problem state areas. 18557c038749SMark Nutter */ 18567c038749SMark Nutter 18577c038749SMark Nutter save_mfc_queues(prev, spu); /* Step 19. */ 18587c038749SMark Nutter save_ppu_querymask(prev, spu); /* Step 20. */ 18597c038749SMark Nutter save_ppu_querytype(prev, spu); /* Step 21. */ 18607c038749SMark Nutter save_mfc_csr_tsq(prev, spu); /* Step 22. */ 18617c038749SMark Nutter save_mfc_csr_cmd(prev, spu); /* Step 23. */ 18627c038749SMark Nutter save_mfc_csr_ato(prev, spu); /* Step 24. */ 18637c038749SMark Nutter save_mfc_tclass_id(prev, spu); /* Step 25. */ 18647c038749SMark Nutter set_mfc_tclass_id(prev, spu); /* Step 26. */ 18657c038749SMark Nutter purge_mfc_queue(prev, spu); /* Step 27. */ 18667c038749SMark Nutter wait_purge_complete(prev, spu); /* Step 28. */ 18677c038749SMark Nutter save_mfc_slbs(prev, spu); /* Step 29. */ 18687c038749SMark Nutter setup_mfc_sr1(prev, spu); /* Step 30. */ 18697c038749SMark Nutter save_spu_npc(prev, spu); /* Step 31. */ 18707c038749SMark Nutter save_spu_privcntl(prev, spu); /* Step 32. */ 18717c038749SMark Nutter reset_spu_privcntl(prev, spu); /* Step 33. */ 18727c038749SMark Nutter save_spu_lslr(prev, spu); /* Step 34. */ 18737c038749SMark Nutter reset_spu_lslr(prev, spu); /* Step 35. */ 18747c038749SMark Nutter save_spu_cfg(prev, spu); /* Step 36. */ 18757c038749SMark Nutter save_pm_trace(prev, spu); /* Step 37. */ 18767c038749SMark Nutter save_mfc_rag(prev, spu); /* Step 38. */ 18777c038749SMark Nutter save_ppu_mb_stat(prev, spu); /* Step 39. */ 18787c038749SMark Nutter save_ppu_mb(prev, spu); /* Step 40. */ 18797c038749SMark Nutter save_ppuint_mb(prev, spu); /* Step 41. */ 18807c038749SMark Nutter save_ch_part1(prev, spu); /* Step 42. */ 18817c038749SMark Nutter save_spu_mb(prev, spu); /* Step 43. */ 18827c038749SMark Nutter save_mfc_cmd(prev, spu); /* Step 44. */ 18837c038749SMark Nutter reset_ch(prev, spu); /* Step 45. */ 18847c038749SMark Nutter } 18857c038749SMark Nutter 18867c038749SMark Nutter static void save_lscsa(struct spu_state *prev, struct spu *spu) 18877c038749SMark Nutter { 18887c038749SMark Nutter /* 18897c038749SMark Nutter * Perform steps 46-57 of SPU context save sequence, 18907c038749SMark Nutter * which save regions of the local store and register 18917c038749SMark Nutter * file. 18927c038749SMark Nutter */ 18937c038749SMark Nutter 18947c038749SMark Nutter resume_mfc_queue(prev, spu); /* Step 46. */ 18957c038749SMark Nutter setup_mfc_slbs(prev, spu); /* Step 47. */ 18967c038749SMark Nutter set_switch_active(prev, spu); /* Step 48. */ 18977c038749SMark Nutter enable_interrupts(prev, spu); /* Step 49. */ 18987c038749SMark Nutter save_ls_16kb(prev, spu); /* Step 50. */ 18997c038749SMark Nutter set_spu_npc(prev, spu); /* Step 51. */ 19007c038749SMark Nutter set_signot1(prev, spu); /* Step 52. */ 19017c038749SMark Nutter set_signot2(prev, spu); /* Step 53. */ 19027c038749SMark Nutter send_save_code(prev, spu); /* Step 54. */ 19037c038749SMark Nutter set_ppu_querymask(prev, spu); /* Step 55. */ 19047c038749SMark Nutter wait_tag_complete(prev, spu); /* Step 56. */ 19057c038749SMark Nutter wait_spu_stopped(prev, spu); /* Step 57. */ 19067c038749SMark Nutter } 19077c038749SMark Nutter 19087c038749SMark Nutter static void harvest(struct spu_state *prev, struct spu *spu) 19097c038749SMark Nutter { 19107c038749SMark Nutter /* 19117c038749SMark Nutter * Perform steps 2-25 of SPU context restore sequence, 19127c038749SMark Nutter * which resets an SPU either after a failed save, or 19137c038749SMark Nutter * when using SPU for first time. 19147c038749SMark Nutter */ 19157c038749SMark Nutter 19167c038749SMark Nutter disable_interrupts(prev, spu); /* Step 2. */ 19177c038749SMark Nutter inhibit_user_access(prev, spu); /* Step 3. */ 19187c038749SMark Nutter terminate_spu_app(prev, spu); /* Step 4. */ 19197c038749SMark Nutter set_switch_pending(prev, spu); /* Step 5. */ 19207c038749SMark Nutter remove_other_spu_access(prev, spu); /* Step 6. */ 19217c038749SMark Nutter suspend_mfc(prev, spu); /* Step 7. */ 19227c038749SMark Nutter wait_suspend_mfc_complete(prev, spu); /* Step 8. */ 19237c038749SMark Nutter if (!suspend_spe(prev, spu)) /* Step 9. */ 19247c038749SMark Nutter clear_spu_status(prev, spu); /* Step 10. */ 19257c038749SMark Nutter do_mfc_mssync(prev, spu); /* Step 11. */ 19267c038749SMark Nutter issue_mfc_tlbie(prev, spu); /* Step 12. */ 19277c038749SMark Nutter handle_pending_interrupts(prev, spu); /* Step 13. */ 19287c038749SMark Nutter purge_mfc_queue(prev, spu); /* Step 14. */ 19297c038749SMark Nutter wait_purge_complete(prev, spu); /* Step 15. */ 19307c038749SMark Nutter reset_spu_privcntl(prev, spu); /* Step 16. */ 19317c038749SMark Nutter reset_spu_lslr(prev, spu); /* Step 17. */ 19327c038749SMark Nutter setup_mfc_sr1(prev, spu); /* Step 18. */ 19337c038749SMark Nutter invalidate_slbs(prev, spu); /* Step 19. */ 19347c038749SMark Nutter reset_ch_part1(prev, spu); /* Step 20. */ 19357c038749SMark Nutter reset_ch_part2(prev, spu); /* Step 21. */ 19367c038749SMark Nutter enable_interrupts(prev, spu); /* Step 22. */ 19377c038749SMark Nutter set_switch_active(prev, spu); /* Step 23. */ 19387c038749SMark Nutter set_mfc_tclass_id(prev, spu); /* Step 24. */ 19397c038749SMark Nutter resume_mfc_queue(prev, spu); /* Step 25. */ 19407c038749SMark Nutter } 19417c038749SMark Nutter 19427c038749SMark Nutter static void restore_lscsa(struct spu_state *next, struct spu *spu) 19437c038749SMark Nutter { 19447c038749SMark Nutter /* 19457c038749SMark Nutter * Perform steps 26-40 of SPU context restore sequence, 19467c038749SMark Nutter * which restores regions of the local store and register 19477c038749SMark Nutter * file. 19487c038749SMark Nutter */ 19497c038749SMark Nutter 19507c038749SMark Nutter set_watchdog_timer(next, spu); /* Step 26. */ 19517c038749SMark Nutter setup_spu_status_part1(next, spu); /* Step 27. */ 19527c038749SMark Nutter setup_spu_status_part2(next, spu); /* Step 28. */ 19537c038749SMark Nutter restore_mfc_rag(next, spu); /* Step 29. */ 19547c038749SMark Nutter setup_mfc_slbs(next, spu); /* Step 30. */ 19557c038749SMark Nutter set_spu_npc(next, spu); /* Step 31. */ 19567c038749SMark Nutter set_signot1(next, spu); /* Step 32. */ 19577c038749SMark Nutter set_signot2(next, spu); /* Step 33. */ 19587c038749SMark Nutter setup_decr(next, spu); /* Step 34. */ 19597c038749SMark Nutter setup_ppu_mb(next, spu); /* Step 35. */ 19607c038749SMark Nutter setup_ppuint_mb(next, spu); /* Step 36. */ 19617c038749SMark Nutter send_restore_code(next, spu); /* Step 37. */ 19627c038749SMark Nutter set_ppu_querymask(next, spu); /* Step 38. */ 19637c038749SMark Nutter wait_tag_complete(next, spu); /* Step 39. */ 19647c038749SMark Nutter wait_spu_stopped(next, spu); /* Step 40. */ 19657c038749SMark Nutter } 19667c038749SMark Nutter 19677c038749SMark Nutter static void restore_csa(struct spu_state *next, struct spu *spu) 19687c038749SMark Nutter { 19697c038749SMark Nutter /* 19707c038749SMark Nutter * Combine steps 41-76 of SPU context restore sequence, which 19717c038749SMark Nutter * restore regions of the privileged & problem state areas. 19727c038749SMark Nutter */ 19737c038749SMark Nutter 19747c038749SMark Nutter restore_spu_privcntl(next, spu); /* Step 41. */ 19757c038749SMark Nutter restore_status_part1(next, spu); /* Step 42. */ 19767c038749SMark Nutter restore_status_part2(next, spu); /* Step 43. */ 19777c038749SMark Nutter restore_ls_16kb(next, spu); /* Step 44. */ 19787c038749SMark Nutter wait_tag_complete(next, spu); /* Step 45. */ 19797c038749SMark Nutter suspend_mfc(next, spu); /* Step 46. */ 19807c038749SMark Nutter wait_suspend_mfc_complete(next, spu); /* Step 47. */ 19817c038749SMark Nutter issue_mfc_tlbie(next, spu); /* Step 48. */ 19827c038749SMark Nutter clear_interrupts(next, spu); /* Step 49. */ 19837c038749SMark Nutter restore_mfc_queues(next, spu); /* Step 50. */ 19847c038749SMark Nutter restore_ppu_querymask(next, spu); /* Step 51. */ 19857c038749SMark Nutter restore_ppu_querytype(next, spu); /* Step 52. */ 19867c038749SMark Nutter restore_mfc_csr_tsq(next, spu); /* Step 53. */ 19877c038749SMark Nutter restore_mfc_csr_cmd(next, spu); /* Step 54. */ 19887c038749SMark Nutter restore_mfc_csr_ato(next, spu); /* Step 55. */ 19897c038749SMark Nutter restore_mfc_tclass_id(next, spu); /* Step 56. */ 19907c038749SMark Nutter set_llr_event(next, spu); /* Step 57. */ 19917c038749SMark Nutter restore_decr_wrapped(next, spu); /* Step 58. */ 19927c038749SMark Nutter restore_ch_part1(next, spu); /* Step 59. */ 19937c038749SMark Nutter restore_ch_part2(next, spu); /* Step 60. */ 19947c038749SMark Nutter restore_spu_lslr(next, spu); /* Step 61. */ 19957c038749SMark Nutter restore_spu_cfg(next, spu); /* Step 62. */ 19967c038749SMark Nutter restore_pm_trace(next, spu); /* Step 63. */ 19977c038749SMark Nutter restore_spu_npc(next, spu); /* Step 64. */ 19987c038749SMark Nutter restore_spu_mb(next, spu); /* Step 65. */ 19997c038749SMark Nutter check_ppu_mb_stat(next, spu); /* Step 66. */ 20007c038749SMark Nutter check_ppuint_mb_stat(next, spu); /* Step 67. */ 20017c038749SMark Nutter restore_mfc_slbs(next, spu); /* Step 68. */ 20027c038749SMark Nutter restore_mfc_sr1(next, spu); /* Step 69. */ 20037c038749SMark Nutter restore_other_spu_access(next, spu); /* Step 70. */ 20047c038749SMark Nutter restore_spu_runcntl(next, spu); /* Step 71. */ 20057c038749SMark Nutter restore_mfc_cntl(next, spu); /* Step 72. */ 20067c038749SMark Nutter enable_user_access(next, spu); /* Step 73. */ 20077c038749SMark Nutter reset_switch_active(next, spu); /* Step 74. */ 20087c038749SMark Nutter reenable_interrupts(next, spu); /* Step 75. */ 20097c038749SMark Nutter } 20107c038749SMark Nutter 20117c038749SMark Nutter static int __do_spu_save(struct spu_state *prev, struct spu *spu) 20127c038749SMark Nutter { 20137c038749SMark Nutter int rc; 20147c038749SMark Nutter 20157c038749SMark Nutter /* 20167c038749SMark Nutter * SPU context save can be broken into three phases: 20177c038749SMark Nutter * 20187c038749SMark Nutter * (a) quiesce [steps 2-16]. 20197c038749SMark Nutter * (b) save of CSA, performed by PPE [steps 17-42] 20207c038749SMark Nutter * (c) save of LSCSA, mostly performed by SPU [steps 43-52]. 20217c038749SMark Nutter * 20227c038749SMark Nutter * Returns 0 on success. 20237c038749SMark Nutter * 2,6 if failed to quiece SPU 20247c038749SMark Nutter * 53 if SPU-side of save failed. 20257c038749SMark Nutter */ 20267c038749SMark Nutter 20277c038749SMark Nutter rc = quiece_spu(prev, spu); /* Steps 2-16. */ 20287c038749SMark Nutter switch (rc) { 20297c038749SMark Nutter default: 20307c038749SMark Nutter case 2: 20317c038749SMark Nutter case 6: 20327c038749SMark Nutter harvest(prev, spu); 20337c038749SMark Nutter return rc; 20347c038749SMark Nutter break; 20357c038749SMark Nutter case 0: 20367c038749SMark Nutter break; 20377c038749SMark Nutter } 20387c038749SMark Nutter save_csa(prev, spu); /* Steps 17-43. */ 20397c038749SMark Nutter save_lscsa(prev, spu); /* Steps 44-53. */ 20407c038749SMark Nutter return check_save_status(prev, spu); /* Step 54. */ 20417c038749SMark Nutter } 20427c038749SMark Nutter 20437c038749SMark Nutter static int __do_spu_restore(struct spu_state *next, struct spu *spu) 20447c038749SMark Nutter { 20457c038749SMark Nutter int rc; 20467c038749SMark Nutter 20477c038749SMark Nutter /* 20487c038749SMark Nutter * SPU context restore can be broken into three phases: 20497c038749SMark Nutter * 20507c038749SMark Nutter * (a) harvest (or reset) SPU [steps 2-24]. 20517c038749SMark Nutter * (b) restore LSCSA [steps 25-40], mostly performed by SPU. 20527c038749SMark Nutter * (c) restore CSA [steps 41-76], performed by PPE. 20537c038749SMark Nutter * 20547c038749SMark Nutter * The 'harvest' step is not performed here, but rather 20557c038749SMark Nutter * as needed below. 20567c038749SMark Nutter */ 20577c038749SMark Nutter 20587c038749SMark Nutter restore_lscsa(next, spu); /* Steps 24-39. */ 20597c038749SMark Nutter rc = check_restore_status(next, spu); /* Step 40. */ 20607c038749SMark Nutter switch (rc) { 20617c038749SMark Nutter default: 20627c038749SMark Nutter /* Failed. Return now. */ 20637c038749SMark Nutter return rc; 20647c038749SMark Nutter break; 20657c038749SMark Nutter case 0: 20667c038749SMark Nutter /* Fall through to next step. */ 20677c038749SMark Nutter break; 20687c038749SMark Nutter } 20697c038749SMark Nutter restore_csa(next, spu); 20707c038749SMark Nutter 20717c038749SMark Nutter return 0; 20727c038749SMark Nutter } 20737c038749SMark Nutter 20745473af04SMark Nutter /** 20755473af04SMark Nutter * spu_save - SPU context save, with locking. 20765473af04SMark Nutter * @prev: pointer to SPU context save area, to be saved. 20775473af04SMark Nutter * @spu: pointer to SPU iomem structure. 20785473af04SMark Nutter * 20795473af04SMark Nutter * Acquire locks, perform the save operation then return. 20805473af04SMark Nutter */ 20815473af04SMark Nutter int spu_save(struct spu_state *prev, struct spu *spu) 20825473af04SMark Nutter { 20837c038749SMark Nutter int rc; 20845473af04SMark Nutter 20857c038749SMark Nutter acquire_spu_lock(spu); /* Step 1. */ 20867c038749SMark Nutter rc = __do_spu_save(prev, spu); /* Steps 2-53. */ 20877c038749SMark Nutter release_spu_lock(spu); 20888b3d6663SArnd Bergmann if (rc) { 20898b3d6663SArnd Bergmann panic("%s failed on SPU[%d], rc=%d.\n", 20908b3d6663SArnd Bergmann __func__, spu->number, rc); 20918b3d6663SArnd Bergmann } 20927c038749SMark Nutter return rc; 20935473af04SMark Nutter } 209491edfa49Sarnd@arndb.de EXPORT_SYMBOL_GPL(spu_save); 20955473af04SMark Nutter 20965473af04SMark Nutter /** 20975473af04SMark Nutter * spu_restore - SPU context restore, with harvest and locking. 20985473af04SMark Nutter * @new: pointer to SPU context save area, to be restored. 20995473af04SMark Nutter * @spu: pointer to SPU iomem structure. 21005473af04SMark Nutter * 21015473af04SMark Nutter * Perform harvest + restore, as we may not be coming 21025473af04SMark Nutter * from a previous succesful save operation, and the 21035473af04SMark Nutter * hardware state is unknown. 21045473af04SMark Nutter */ 21055473af04SMark Nutter int spu_restore(struct spu_state *new, struct spu *spu) 21065473af04SMark Nutter { 21077c038749SMark Nutter int rc; 21085473af04SMark Nutter 21097c038749SMark Nutter acquire_spu_lock(spu); 21107c038749SMark Nutter harvest(NULL, spu); 21118b3d6663SArnd Bergmann spu->stop_code = 0; 21128b3d6663SArnd Bergmann spu->dar = 0; 21138b3d6663SArnd Bergmann spu->dsisr = 0; 21148b3d6663SArnd Bergmann spu->slb_replace = 0; 21158b3d6663SArnd Bergmann spu->class_0_pending = 0; 21167c038749SMark Nutter rc = __do_spu_restore(new, spu); 21177c038749SMark Nutter release_spu_lock(spu); 21188b3d6663SArnd Bergmann if (rc) { 21198b3d6663SArnd Bergmann panic("%s failed on SPU[%d] rc=%d.\n", 21208b3d6663SArnd Bergmann __func__, spu->number, rc); 21218b3d6663SArnd Bergmann } 21227c038749SMark Nutter return rc; 21235473af04SMark Nutter } 212491edfa49Sarnd@arndb.de EXPORT_SYMBOL_GPL(spu_restore); 21255473af04SMark Nutter 21265473af04SMark Nutter /** 21278b3d6663SArnd Bergmann * spu_harvest - SPU harvest (reset) operation 21285473af04SMark Nutter * @spu: pointer to SPU iomem structure. 21295473af04SMark Nutter * 21308b3d6663SArnd Bergmann * Perform SPU harvest (reset) operation. 21315473af04SMark Nutter */ 21328b3d6663SArnd Bergmann void spu_harvest(struct spu *spu) 21335473af04SMark Nutter { 21348b3d6663SArnd Bergmann acquire_spu_lock(spu); 21358b3d6663SArnd Bergmann harvest(NULL, spu); 21367c038749SMark Nutter release_spu_lock(spu); 21375473af04SMark Nutter } 21385473af04SMark Nutter 21395473af04SMark Nutter static void init_prob(struct spu_state *csa) 21405473af04SMark Nutter { 21415473af04SMark Nutter csa->spu_chnlcnt_RW[9] = 1; 21425473af04SMark Nutter csa->spu_chnlcnt_RW[21] = 16; 21435473af04SMark Nutter csa->spu_chnlcnt_RW[23] = 1; 21445473af04SMark Nutter csa->spu_chnlcnt_RW[28] = 1; 21455473af04SMark Nutter csa->spu_chnlcnt_RW[30] = 1; 21465473af04SMark Nutter csa->prob.spu_runcntl_RW = SPU_RUNCNTL_STOP; 2147970f1baaSarnd@arndb.de csa->prob.mb_stat_R = 0x000400; 21485473af04SMark Nutter } 21495473af04SMark Nutter 21505473af04SMark Nutter static void init_priv1(struct spu_state *csa) 21515473af04SMark Nutter { 21525473af04SMark Nutter /* Enable decode, relocate, tlbie response, master runcntl. */ 21535473af04SMark Nutter csa->priv1.mfc_sr1_RW = MFC_STATE1_LOCAL_STORAGE_DECODE_MASK | 21545473af04SMark Nutter MFC_STATE1_MASTER_RUN_CONTROL_MASK | 21555473af04SMark Nutter MFC_STATE1_PROBLEM_STATE_MASK | 21565473af04SMark Nutter MFC_STATE1_RELOCATE_MASK | MFC_STATE1_BUS_TLBIE_MASK; 21575473af04SMark Nutter 21585473af04SMark Nutter /* Set storage description. */ 21595473af04SMark Nutter csa->priv1.mfc_sdr_RW = mfspr(SPRN_SDR1); 21605473af04SMark Nutter 21615473af04SMark Nutter /* Enable OS-specific set of interrupts. */ 21625473af04SMark Nutter csa->priv1.int_mask_class0_RW = CLASS0_ENABLE_DMA_ALIGNMENT_INTR | 21635473af04SMark Nutter CLASS0_ENABLE_INVALID_DMA_COMMAND_INTR | 21645473af04SMark Nutter CLASS0_ENABLE_SPU_ERROR_INTR; 21655473af04SMark Nutter csa->priv1.int_mask_class1_RW = CLASS1_ENABLE_SEGMENT_FAULT_INTR | 21665473af04SMark Nutter CLASS1_ENABLE_STORAGE_FAULT_INTR; 21673a843d7cSArnd Bergmann csa->priv1.int_mask_class2_RW = CLASS2_ENABLE_SPU_STOP_INTR | 2168a33a7d73SArnd Bergmann CLASS2_ENABLE_SPU_HALT_INTR | 2169a33a7d73SArnd Bergmann CLASS2_ENABLE_SPU_DMA_TAG_GROUP_COMPLETE_INTR; 21705473af04SMark Nutter } 21715473af04SMark Nutter 21725473af04SMark Nutter static void init_priv2(struct spu_state *csa) 21735473af04SMark Nutter { 21745473af04SMark Nutter csa->priv2.spu_lslr_RW = LS_ADDR_MASK; 21755473af04SMark Nutter csa->priv2.mfc_control_RW = MFC_CNTL_RESUME_DMA_QUEUE | 21765473af04SMark Nutter MFC_CNTL_NORMAL_DMA_QUEUE_OPERATION | 21775473af04SMark Nutter MFC_CNTL_DMA_QUEUES_EMPTY_MASK; 21785473af04SMark Nutter } 21795473af04SMark Nutter 21805473af04SMark Nutter /** 21815473af04SMark Nutter * spu_alloc_csa - allocate and initialize an SPU context save area. 21825473af04SMark Nutter * 21835473af04SMark Nutter * Allocate and initialize the contents of an SPU context save area. 21845473af04SMark Nutter * This includes enabling address translation, interrupt masks, etc., 21855473af04SMark Nutter * as appropriate for the given OS environment. 21865473af04SMark Nutter * 21875473af04SMark Nutter * Note that storage for the 'lscsa' is allocated separately, 21885473af04SMark Nutter * as it is by far the largest of the context save regions, 21895473af04SMark Nutter * and may need to be pinned or otherwise specially aligned. 21905473af04SMark Nutter */ 21915473af04SMark Nutter void spu_init_csa(struct spu_state *csa) 21925473af04SMark Nutter { 21935473af04SMark Nutter struct spu_lscsa *lscsa; 21948b3d6663SArnd Bergmann unsigned char *p; 21955473af04SMark Nutter 21965473af04SMark Nutter if (!csa) 21975473af04SMark Nutter return; 21985473af04SMark Nutter memset(csa, 0, sizeof(struct spu_state)); 21995473af04SMark Nutter 22005473af04SMark Nutter lscsa = vmalloc(sizeof(struct spu_lscsa)); 22015473af04SMark Nutter if (!lscsa) 22025473af04SMark Nutter return; 22035473af04SMark Nutter 22045473af04SMark Nutter memset(lscsa, 0, sizeof(struct spu_lscsa)); 22055473af04SMark Nutter csa->lscsa = lscsa; 22068b3d6663SArnd Bergmann csa->register_lock = SPIN_LOCK_UNLOCKED; 22078b3d6663SArnd Bergmann 22088b3d6663SArnd Bergmann /* Set LS pages reserved to allow for user-space mapping. */ 22098b3d6663SArnd Bergmann for (p = lscsa->ls; p < lscsa->ls + LS_SIZE; p += PAGE_SIZE) 22108b3d6663SArnd Bergmann SetPageReserved(vmalloc_to_page(p)); 22115473af04SMark Nutter 22125473af04SMark Nutter init_prob(csa); 22135473af04SMark Nutter init_priv1(csa); 22145473af04SMark Nutter init_priv2(csa); 22155473af04SMark Nutter } 221691edfa49Sarnd@arndb.de EXPORT_SYMBOL_GPL(spu_init_csa); 22175473af04SMark Nutter 22185473af04SMark Nutter void spu_fini_csa(struct spu_state *csa) 22195473af04SMark Nutter { 22208b3d6663SArnd Bergmann /* Clear reserved bit before vfree. */ 22218b3d6663SArnd Bergmann unsigned char *p; 22228b3d6663SArnd Bergmann for (p = csa->lscsa->ls; p < csa->lscsa->ls + LS_SIZE; p += PAGE_SIZE) 22238b3d6663SArnd Bergmann ClearPageReserved(vmalloc_to_page(p)); 22248b3d6663SArnd Bergmann 22255473af04SMark Nutter vfree(csa->lscsa); 22265473af04SMark Nutter } 222791edfa49Sarnd@arndb.de EXPORT_SYMBOL_GPL(spu_fini_csa); 2228