1e01402b1SRalf Baechle /* 2e01402b1SRalf Baechle * Copyright (C) 2004, 2005 MIPS Technologies, Inc. All rights reserved. 3e01402b1SRalf Baechle * 4e01402b1SRalf Baechle * This program is free software; you can distribute it and/or modify it 5e01402b1SRalf Baechle * under the terms of the GNU General Public License (Version 2) as 6e01402b1SRalf Baechle * published by the Free Software Foundation. 7e01402b1SRalf Baechle * 8e01402b1SRalf Baechle * This program is distributed in the hope it will be useful, but WITHOUT 9e01402b1SRalf Baechle * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 10e01402b1SRalf Baechle * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 11e01402b1SRalf Baechle * for more details. 12e01402b1SRalf Baechle * 13e01402b1SRalf Baechle * You should have received a copy of the GNU General Public License along 14e01402b1SRalf Baechle * with this program; if not, write to the Free Software Foundation, Inc., 15e01402b1SRalf Baechle * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA. 16e01402b1SRalf Baechle */ 17e01402b1SRalf Baechle 18e01402b1SRalf Baechle /* 19e01402b1SRalf Baechle * VPE support module 20e01402b1SRalf Baechle * 21e01402b1SRalf Baechle * Provides support for loading a MIPS SP program on VPE1. 22e01402b1SRalf Baechle * The SP enviroment is rather simple, no tlb's. It needs to be relocatable 23e01402b1SRalf Baechle * (or partially linked). You should initialise your stack in the startup 24e01402b1SRalf Baechle * code. This loader looks for the symbol __start and sets up 25e01402b1SRalf Baechle * execution to resume from there. The MIPS SDE kit contains suitable examples. 26e01402b1SRalf Baechle * 27e01402b1SRalf Baechle * To load and run, simply cat a SP 'program file' to /dev/vpe1. 28e01402b1SRalf Baechle * i.e cat spapp >/dev/vpe1. 29e01402b1SRalf Baechle */ 30e01402b1SRalf Baechle #include <linux/kernel.h> 3127a3bbafSRalf Baechle #include <linux/device.h> 32e01402b1SRalf Baechle #include <linux/module.h> 33e01402b1SRalf Baechle #include <linux/fs.h> 34e01402b1SRalf Baechle #include <linux/init.h> 35e01402b1SRalf Baechle #include <asm/uaccess.h> 36e01402b1SRalf Baechle #include <linux/slab.h> 37e01402b1SRalf Baechle #include <linux/list.h> 38e01402b1SRalf Baechle #include <linux/vmalloc.h> 39e01402b1SRalf Baechle #include <linux/elf.h> 40e01402b1SRalf Baechle #include <linux/seq_file.h> 417558da94SJonathan Corbet #include <linux/smp_lock.h> 42e01402b1SRalf Baechle #include <linux/syscalls.h> 43e01402b1SRalf Baechle #include <linux/moduleloader.h> 44e01402b1SRalf Baechle #include <linux/interrupt.h> 45e01402b1SRalf Baechle #include <linux/poll.h> 46e01402b1SRalf Baechle #include <linux/bootmem.h> 47e01402b1SRalf Baechle #include <asm/mipsregs.h> 48340ee4b9SRalf Baechle #include <asm/mipsmtregs.h> 49e01402b1SRalf Baechle #include <asm/cacheflush.h> 50e01402b1SRalf Baechle #include <asm/atomic.h> 51e01402b1SRalf Baechle #include <asm/cpu.h> 5227a3bbafSRalf Baechle #include <asm/mips_mt.h> 53e01402b1SRalf Baechle #include <asm/processor.h> 54e01402b1SRalf Baechle #include <asm/system.h> 552600990eSRalf Baechle #include <asm/vpe.h> 562600990eSRalf Baechle #include <asm/kspd.h> 57e01402b1SRalf Baechle 58e01402b1SRalf Baechle typedef void *vpe_handle; 59e01402b1SRalf Baechle 60e01402b1SRalf Baechle #ifndef ARCH_SHF_SMALL 61e01402b1SRalf Baechle #define ARCH_SHF_SMALL 0 62e01402b1SRalf Baechle #endif 63e01402b1SRalf Baechle 64e01402b1SRalf Baechle /* If this is set, the section belongs in the init part of the module */ 65e01402b1SRalf Baechle #define INIT_OFFSET_MASK (1UL << (BITS_PER_LONG-1)) 66e01402b1SRalf Baechle 6741790e04SRalf Baechle /* 6841790e04SRalf Baechle * The number of TCs and VPEs physically available on the core 6941790e04SRalf Baechle */ 7041790e04SRalf Baechle static int hw_tcs, hw_vpes; 71e01402b1SRalf Baechle static char module_name[] = "vpe"; 72307bd284SRalf Baechle static int major; 7327a3bbafSRalf Baechle static const int minor = 1; /* fixed for now */ 74e01402b1SRalf Baechle 752600990eSRalf Baechle #ifdef CONFIG_MIPS_APSP_KSPD 762600990eSRalf Baechle static struct kspd_notifications kspd_events; 772600990eSRalf Baechle static int kspd_events_reqd = 0; 782600990eSRalf Baechle #endif 792600990eSRalf Baechle 80e01402b1SRalf Baechle /* grab the likely amount of memory we will need. */ 81e01402b1SRalf Baechle #ifdef CONFIG_MIPS_VPE_LOADER_TOM 82e01402b1SRalf Baechle #define P_SIZE (2 * 1024 * 1024) 83e01402b1SRalf Baechle #else 84e01402b1SRalf Baechle /* add an overhead to the max kmalloc size for non-striped symbols/etc */ 85e01402b1SRalf Baechle #define P_SIZE (256 * 1024) 86e01402b1SRalf Baechle #endif 87e01402b1SRalf Baechle 882600990eSRalf Baechle extern unsigned long physical_memsize; 892600990eSRalf Baechle 90e01402b1SRalf Baechle #define MAX_VPES 16 912600990eSRalf Baechle #define VPE_PATH_MAX 256 92e01402b1SRalf Baechle 93e01402b1SRalf Baechle enum vpe_state { 94e01402b1SRalf Baechle VPE_STATE_UNUSED = 0, 95e01402b1SRalf Baechle VPE_STATE_INUSE, 96e01402b1SRalf Baechle VPE_STATE_RUNNING 97e01402b1SRalf Baechle }; 98e01402b1SRalf Baechle 99e01402b1SRalf Baechle enum tc_state { 100e01402b1SRalf Baechle TC_STATE_UNUSED = 0, 101e01402b1SRalf Baechle TC_STATE_INUSE, 102e01402b1SRalf Baechle TC_STATE_RUNNING, 103e01402b1SRalf Baechle TC_STATE_DYNAMIC 104e01402b1SRalf Baechle }; 105e01402b1SRalf Baechle 106307bd284SRalf Baechle struct vpe { 107e01402b1SRalf Baechle enum vpe_state state; 108e01402b1SRalf Baechle 109e01402b1SRalf Baechle /* (device) minor associated with this vpe */ 110e01402b1SRalf Baechle int minor; 111e01402b1SRalf Baechle 112e01402b1SRalf Baechle /* elfloader stuff */ 113e01402b1SRalf Baechle void *load_addr; 114571e0bedSRalf Baechle unsigned long len; 115e01402b1SRalf Baechle char *pbuffer; 116571e0bedSRalf Baechle unsigned long plen; 1172600990eSRalf Baechle unsigned int uid, gid; 1182600990eSRalf Baechle char cwd[VPE_PATH_MAX]; 119e01402b1SRalf Baechle 120e01402b1SRalf Baechle unsigned long __start; 121e01402b1SRalf Baechle 122e01402b1SRalf Baechle /* tc's associated with this vpe */ 123e01402b1SRalf Baechle struct list_head tc; 124e01402b1SRalf Baechle 125e01402b1SRalf Baechle /* The list of vpe's */ 126e01402b1SRalf Baechle struct list_head list; 127e01402b1SRalf Baechle 128e01402b1SRalf Baechle /* shared symbol address */ 129e01402b1SRalf Baechle void *shared_ptr; 1302600990eSRalf Baechle 1312600990eSRalf Baechle /* the list of who wants to know when something major happens */ 1322600990eSRalf Baechle struct list_head notify; 13341790e04SRalf Baechle 13441790e04SRalf Baechle unsigned int ntcs; 135307bd284SRalf Baechle }; 136307bd284SRalf Baechle 137307bd284SRalf Baechle struct tc { 138307bd284SRalf Baechle enum tc_state state; 139307bd284SRalf Baechle int index; 140307bd284SRalf Baechle 14107cc0c9eSRalf Baechle struct vpe *pvpe; /* parent VPE */ 14207cc0c9eSRalf Baechle struct list_head tc; /* The list of TC's with this VPE */ 14307cc0c9eSRalf Baechle struct list_head list; /* The global list of tc's */ 144307bd284SRalf Baechle }; 145e01402b1SRalf Baechle 1469cfdf6f1SRalf Baechle struct { 147e01402b1SRalf Baechle /* Virtual processing elements */ 148e01402b1SRalf Baechle struct list_head vpe_list; 149e01402b1SRalf Baechle 150e01402b1SRalf Baechle /* Thread contexts */ 151e01402b1SRalf Baechle struct list_head tc_list; 1529cfdf6f1SRalf Baechle } vpecontrol = { 1539cfdf6f1SRalf Baechle .vpe_list = LIST_HEAD_INIT(vpecontrol.vpe_list), 1549cfdf6f1SRalf Baechle .tc_list = LIST_HEAD_INIT(vpecontrol.tc_list) 1559cfdf6f1SRalf Baechle }; 156e01402b1SRalf Baechle 157e01402b1SRalf Baechle static void release_progmem(void *ptr); 158e01402b1SRalf Baechle 159e01402b1SRalf Baechle /* get the vpe associated with this minor */ 160f18b51ccSRalf Baechle static struct vpe *get_vpe(int minor) 161e01402b1SRalf Baechle { 162e01402b1SRalf Baechle struct vpe *v; 163e01402b1SRalf Baechle 1642600990eSRalf Baechle if (!cpu_has_mipsmt) 1652600990eSRalf Baechle return NULL; 1662600990eSRalf Baechle 167e01402b1SRalf Baechle list_for_each_entry(v, &vpecontrol.vpe_list, list) { 168e01402b1SRalf Baechle if (v->minor == minor) 169e01402b1SRalf Baechle return v; 170e01402b1SRalf Baechle } 171e01402b1SRalf Baechle 172e01402b1SRalf Baechle return NULL; 173e01402b1SRalf Baechle } 174e01402b1SRalf Baechle 175e01402b1SRalf Baechle /* get the vpe associated with this minor */ 176f18b51ccSRalf Baechle static struct tc *get_tc(int index) 177e01402b1SRalf Baechle { 178e01402b1SRalf Baechle struct tc *t; 179e01402b1SRalf Baechle 180e01402b1SRalf Baechle list_for_each_entry(t, &vpecontrol.tc_list, list) { 181e01402b1SRalf Baechle if (t->index == index) 182e01402b1SRalf Baechle return t; 183e01402b1SRalf Baechle } 184e01402b1SRalf Baechle 185e01402b1SRalf Baechle return NULL; 186e01402b1SRalf Baechle } 187e01402b1SRalf Baechle 188e01402b1SRalf Baechle struct tc *get_tc_unused(void) 189e01402b1SRalf Baechle { 190e01402b1SRalf Baechle struct tc *t; 191e01402b1SRalf Baechle 192e01402b1SRalf Baechle list_for_each_entry(t, &vpecontrol.tc_list, list) { 193e01402b1SRalf Baechle if (t->state == TC_STATE_UNUSED) 194e01402b1SRalf Baechle return t; 195e01402b1SRalf Baechle } 196e01402b1SRalf Baechle 197e01402b1SRalf Baechle return NULL; 198e01402b1SRalf Baechle } 199e01402b1SRalf Baechle 200e01402b1SRalf Baechle /* allocate a vpe and associate it with this minor (or index) */ 201f18b51ccSRalf Baechle static struct vpe *alloc_vpe(int minor) 202e01402b1SRalf Baechle { 203e01402b1SRalf Baechle struct vpe *v; 204e01402b1SRalf Baechle 205307bd284SRalf Baechle if ((v = kzalloc(sizeof(struct vpe), GFP_KERNEL)) == NULL) { 206e01402b1SRalf Baechle return NULL; 207e01402b1SRalf Baechle } 208e01402b1SRalf Baechle 209e01402b1SRalf Baechle INIT_LIST_HEAD(&v->tc); 210e01402b1SRalf Baechle list_add_tail(&v->list, &vpecontrol.vpe_list); 211e01402b1SRalf Baechle 2122600990eSRalf Baechle INIT_LIST_HEAD(&v->notify); 213e01402b1SRalf Baechle v->minor = minor; 214e01402b1SRalf Baechle return v; 215e01402b1SRalf Baechle } 216e01402b1SRalf Baechle 217e01402b1SRalf Baechle /* allocate a tc. At startup only tc0 is running, all other can be halted. */ 218f18b51ccSRalf Baechle static struct tc *alloc_tc(int index) 219e01402b1SRalf Baechle { 22007cc0c9eSRalf Baechle struct tc *tc; 221e01402b1SRalf Baechle 22207cc0c9eSRalf Baechle if ((tc = kzalloc(sizeof(struct tc), GFP_KERNEL)) == NULL) 22307cc0c9eSRalf Baechle goto out; 224e01402b1SRalf Baechle 22507cc0c9eSRalf Baechle INIT_LIST_HEAD(&tc->tc); 22607cc0c9eSRalf Baechle tc->index = index; 22707cc0c9eSRalf Baechle list_add_tail(&tc->list, &vpecontrol.tc_list); 228e01402b1SRalf Baechle 22907cc0c9eSRalf Baechle out: 23007cc0c9eSRalf Baechle return tc; 231e01402b1SRalf Baechle } 232e01402b1SRalf Baechle 233e01402b1SRalf Baechle /* clean up and free everything */ 234f18b51ccSRalf Baechle static void release_vpe(struct vpe *v) 235e01402b1SRalf Baechle { 236e01402b1SRalf Baechle list_del(&v->list); 237e01402b1SRalf Baechle if (v->load_addr) 238e01402b1SRalf Baechle release_progmem(v); 239e01402b1SRalf Baechle kfree(v); 240e01402b1SRalf Baechle } 241e01402b1SRalf Baechle 242f18b51ccSRalf Baechle static void dump_mtregs(void) 243e01402b1SRalf Baechle { 244e01402b1SRalf Baechle unsigned long val; 245e01402b1SRalf Baechle 246e01402b1SRalf Baechle val = read_c0_config3(); 247e01402b1SRalf Baechle printk("config3 0x%lx MT %ld\n", val, 248e01402b1SRalf Baechle (val & CONFIG3_MT) >> CONFIG3_MT_SHIFT); 249e01402b1SRalf Baechle 250e01402b1SRalf Baechle val = read_c0_mvpcontrol(); 251e01402b1SRalf Baechle printk("MVPControl 0x%lx, STLB %ld VPC %ld EVP %ld\n", val, 252e01402b1SRalf Baechle (val & MVPCONTROL_STLB) >> MVPCONTROL_STLB_SHIFT, 253e01402b1SRalf Baechle (val & MVPCONTROL_VPC) >> MVPCONTROL_VPC_SHIFT, 254e01402b1SRalf Baechle (val & MVPCONTROL_EVP)); 255e01402b1SRalf Baechle 2562600990eSRalf Baechle val = read_c0_mvpconf0(); 2572600990eSRalf Baechle printk("mvpconf0 0x%lx, PVPE %ld PTC %ld M %ld\n", val, 2582600990eSRalf Baechle (val & MVPCONF0_PVPE) >> MVPCONF0_PVPE_SHIFT, 2592600990eSRalf Baechle val & MVPCONF0_PTC, (val & MVPCONF0_M) >> MVPCONF0_M_SHIFT); 260e01402b1SRalf Baechle } 261e01402b1SRalf Baechle 262e01402b1SRalf Baechle /* Find some VPE program space */ 263571e0bedSRalf Baechle static void *alloc_progmem(unsigned long len) 264e01402b1SRalf Baechle { 2655408c490SRalf Baechle void *addr; 2665408c490SRalf Baechle 267e01402b1SRalf Baechle #ifdef CONFIG_MIPS_VPE_LOADER_TOM 2685408c490SRalf Baechle /* 2695408c490SRalf Baechle * This means you must tell Linux to use less memory than you 2705408c490SRalf Baechle * physically have, for example by passing a mem= boot argument. 2715408c490SRalf Baechle */ 2729f2546adSRalf Baechle addr = pfn_to_kaddr(max_low_pfn); 2735408c490SRalf Baechle memset(addr, 0, len); 274e01402b1SRalf Baechle #else 2755408c490SRalf Baechle /* simple grab some mem for now */ 2765408c490SRalf Baechle addr = kzalloc(len, GFP_KERNEL); 277e01402b1SRalf Baechle #endif 2785408c490SRalf Baechle 2795408c490SRalf Baechle return addr; 280e01402b1SRalf Baechle } 281e01402b1SRalf Baechle 282e01402b1SRalf Baechle static void release_progmem(void *ptr) 283e01402b1SRalf Baechle { 284e01402b1SRalf Baechle #ifndef CONFIG_MIPS_VPE_LOADER_TOM 285e01402b1SRalf Baechle kfree(ptr); 286e01402b1SRalf Baechle #endif 287e01402b1SRalf Baechle } 288e01402b1SRalf Baechle 289e01402b1SRalf Baechle /* Update size with this section: return offset. */ 290e01402b1SRalf Baechle static long get_offset(unsigned long *size, Elf_Shdr * sechdr) 291e01402b1SRalf Baechle { 292e01402b1SRalf Baechle long ret; 293e01402b1SRalf Baechle 294e01402b1SRalf Baechle ret = ALIGN(*size, sechdr->sh_addralign ? : 1); 295e01402b1SRalf Baechle *size = ret + sechdr->sh_size; 296e01402b1SRalf Baechle return ret; 297e01402b1SRalf Baechle } 298e01402b1SRalf Baechle 299e01402b1SRalf Baechle /* Lay out the SHF_ALLOC sections in a way not dissimilar to how ld 300e01402b1SRalf Baechle might -- code, read-only data, read-write data, small data. Tally 301e01402b1SRalf Baechle sizes, and place the offsets into sh_entsize fields: high bit means it 302e01402b1SRalf Baechle belongs in init. */ 303e01402b1SRalf Baechle static void layout_sections(struct module *mod, const Elf_Ehdr * hdr, 304e01402b1SRalf Baechle Elf_Shdr * sechdrs, const char *secstrings) 305e01402b1SRalf Baechle { 306e01402b1SRalf Baechle static unsigned long const masks[][2] = { 307e01402b1SRalf Baechle /* NOTE: all executable code must be the first section 308e01402b1SRalf Baechle * in this array; otherwise modify the text_size 309e01402b1SRalf Baechle * finder in the two loops below */ 310e01402b1SRalf Baechle {SHF_EXECINSTR | SHF_ALLOC, ARCH_SHF_SMALL}, 311e01402b1SRalf Baechle {SHF_ALLOC, SHF_WRITE | ARCH_SHF_SMALL}, 312e01402b1SRalf Baechle {SHF_WRITE | SHF_ALLOC, ARCH_SHF_SMALL}, 313e01402b1SRalf Baechle {ARCH_SHF_SMALL | SHF_ALLOC, 0} 314e01402b1SRalf Baechle }; 315e01402b1SRalf Baechle unsigned int m, i; 316e01402b1SRalf Baechle 317e01402b1SRalf Baechle for (i = 0; i < hdr->e_shnum; i++) 318e01402b1SRalf Baechle sechdrs[i].sh_entsize = ~0UL; 319e01402b1SRalf Baechle 320e01402b1SRalf Baechle for (m = 0; m < ARRAY_SIZE(masks); ++m) { 321e01402b1SRalf Baechle for (i = 0; i < hdr->e_shnum; ++i) { 322e01402b1SRalf Baechle Elf_Shdr *s = &sechdrs[i]; 323e01402b1SRalf Baechle 324e01402b1SRalf Baechle // || strncmp(secstrings + s->sh_name, ".init", 5) == 0) 325e01402b1SRalf Baechle if ((s->sh_flags & masks[m][0]) != masks[m][0] 326e01402b1SRalf Baechle || (s->sh_flags & masks[m][1]) 327e01402b1SRalf Baechle || s->sh_entsize != ~0UL) 328e01402b1SRalf Baechle continue; 329e2a9cf96SRaghu Gandham s->sh_entsize = 330e2a9cf96SRaghu Gandham get_offset((unsigned long *)&mod->core_size, s); 331e01402b1SRalf Baechle } 332e01402b1SRalf Baechle 333e01402b1SRalf Baechle if (m == 0) 334e01402b1SRalf Baechle mod->core_text_size = mod->core_size; 335e01402b1SRalf Baechle 336e01402b1SRalf Baechle } 337e01402b1SRalf Baechle } 338e01402b1SRalf Baechle 339e01402b1SRalf Baechle 340e01402b1SRalf Baechle /* from module-elf32.c, but subverted a little */ 341e01402b1SRalf Baechle 342e01402b1SRalf Baechle struct mips_hi16 { 343e01402b1SRalf Baechle struct mips_hi16 *next; 344e01402b1SRalf Baechle Elf32_Addr *addr; 345e01402b1SRalf Baechle Elf32_Addr value; 346e01402b1SRalf Baechle }; 347e01402b1SRalf Baechle 348e01402b1SRalf Baechle static struct mips_hi16 *mips_hi16_list; 349e01402b1SRalf Baechle static unsigned int gp_offs, gp_addr; 350e01402b1SRalf Baechle 351e01402b1SRalf Baechle static int apply_r_mips_none(struct module *me, uint32_t *location, 352e01402b1SRalf Baechle Elf32_Addr v) 353e01402b1SRalf Baechle { 354e01402b1SRalf Baechle return 0; 355e01402b1SRalf Baechle } 356e01402b1SRalf Baechle 357e01402b1SRalf Baechle static int apply_r_mips_gprel16(struct module *me, uint32_t *location, 358e01402b1SRalf Baechle Elf32_Addr v) 359e01402b1SRalf Baechle { 360e01402b1SRalf Baechle int rel; 361e01402b1SRalf Baechle 362e01402b1SRalf Baechle if( !(*location & 0xffff) ) { 363e01402b1SRalf Baechle rel = (int)v - gp_addr; 364e01402b1SRalf Baechle } 365e01402b1SRalf Baechle else { 366e01402b1SRalf Baechle /* .sbss + gp(relative) + offset */ 367e01402b1SRalf Baechle /* kludge! */ 368e01402b1SRalf Baechle rel = (int)(short)((int)v + gp_offs + 369e01402b1SRalf Baechle (int)(short)(*location & 0xffff) - gp_addr); 370e01402b1SRalf Baechle } 371e01402b1SRalf Baechle 372e01402b1SRalf Baechle if( (rel > 32768) || (rel < -32768) ) { 3732600990eSRalf Baechle printk(KERN_DEBUG "VPE loader: apply_r_mips_gprel16: " 3742600990eSRalf Baechle "relative address 0x%x out of range of gp register\n", 3752600990eSRalf Baechle rel); 376e01402b1SRalf Baechle return -ENOEXEC; 377e01402b1SRalf Baechle } 378e01402b1SRalf Baechle 379e01402b1SRalf Baechle *location = (*location & 0xffff0000) | (rel & 0xffff); 380e01402b1SRalf Baechle 381e01402b1SRalf Baechle return 0; 382e01402b1SRalf Baechle } 383e01402b1SRalf Baechle 384e01402b1SRalf Baechle static int apply_r_mips_pc16(struct module *me, uint32_t *location, 385e01402b1SRalf Baechle Elf32_Addr v) 386e01402b1SRalf Baechle { 387e01402b1SRalf Baechle int rel; 388e01402b1SRalf Baechle rel = (((unsigned int)v - (unsigned int)location)); 389e01402b1SRalf Baechle rel >>= 2; // because the offset is in _instructions_ not bytes. 390e01402b1SRalf Baechle rel -= 1; // and one instruction less due to the branch delay slot. 391e01402b1SRalf Baechle 392e01402b1SRalf Baechle if( (rel > 32768) || (rel < -32768) ) { 3932600990eSRalf Baechle printk(KERN_DEBUG "VPE loader: " 394e01402b1SRalf Baechle "apply_r_mips_pc16: relative address out of range 0x%x\n", rel); 395e01402b1SRalf Baechle return -ENOEXEC; 396e01402b1SRalf Baechle } 397e01402b1SRalf Baechle 398e01402b1SRalf Baechle *location = (*location & 0xffff0000) | (rel & 0xffff); 399e01402b1SRalf Baechle 400e01402b1SRalf Baechle return 0; 401e01402b1SRalf Baechle } 402e01402b1SRalf Baechle 403e01402b1SRalf Baechle static int apply_r_mips_32(struct module *me, uint32_t *location, 404e01402b1SRalf Baechle Elf32_Addr v) 405e01402b1SRalf Baechle { 406e01402b1SRalf Baechle *location += v; 407e01402b1SRalf Baechle 408e01402b1SRalf Baechle return 0; 409e01402b1SRalf Baechle } 410e01402b1SRalf Baechle 411e01402b1SRalf Baechle static int apply_r_mips_26(struct module *me, uint32_t *location, 412e01402b1SRalf Baechle Elf32_Addr v) 413e01402b1SRalf Baechle { 414e01402b1SRalf Baechle if (v % 4) { 4152600990eSRalf Baechle printk(KERN_DEBUG "VPE loader: apply_r_mips_26 " 4162600990eSRalf Baechle " unaligned relocation\n"); 417e01402b1SRalf Baechle return -ENOEXEC; 418e01402b1SRalf Baechle } 419e01402b1SRalf Baechle 420307bd284SRalf Baechle /* 421307bd284SRalf Baechle * Not desperately convinced this is a good check of an overflow condition 422307bd284SRalf Baechle * anyway. But it gets in the way of handling undefined weak symbols which 423307bd284SRalf Baechle * we want to set to zero. 424307bd284SRalf Baechle * if ((v & 0xf0000000) != (((unsigned long)location + 4) & 0xf0000000)) { 425307bd284SRalf Baechle * printk(KERN_ERR 426307bd284SRalf Baechle * "module %s: relocation overflow\n", 427307bd284SRalf Baechle * me->name); 428307bd284SRalf Baechle * return -ENOEXEC; 429307bd284SRalf Baechle * } 430e01402b1SRalf Baechle */ 431e01402b1SRalf Baechle 432e01402b1SRalf Baechle *location = (*location & ~0x03ffffff) | 433e01402b1SRalf Baechle ((*location + (v >> 2)) & 0x03ffffff); 434e01402b1SRalf Baechle return 0; 435e01402b1SRalf Baechle } 436e01402b1SRalf Baechle 437e01402b1SRalf Baechle static int apply_r_mips_hi16(struct module *me, uint32_t *location, 438e01402b1SRalf Baechle Elf32_Addr v) 439e01402b1SRalf Baechle { 440e01402b1SRalf Baechle struct mips_hi16 *n; 441e01402b1SRalf Baechle 442e01402b1SRalf Baechle /* 443e01402b1SRalf Baechle * We cannot relocate this one now because we don't know the value of 444e01402b1SRalf Baechle * the carry we need to add. Save the information, and let LO16 do the 445e01402b1SRalf Baechle * actual relocation. 446e01402b1SRalf Baechle */ 447e01402b1SRalf Baechle n = kmalloc(sizeof *n, GFP_KERNEL); 448e01402b1SRalf Baechle if (!n) 449e01402b1SRalf Baechle return -ENOMEM; 450e01402b1SRalf Baechle 451e01402b1SRalf Baechle n->addr = location; 452e01402b1SRalf Baechle n->value = v; 453e01402b1SRalf Baechle n->next = mips_hi16_list; 454e01402b1SRalf Baechle mips_hi16_list = n; 455e01402b1SRalf Baechle 456e01402b1SRalf Baechle return 0; 457e01402b1SRalf Baechle } 458e01402b1SRalf Baechle 459e01402b1SRalf Baechle static int apply_r_mips_lo16(struct module *me, uint32_t *location, 460e01402b1SRalf Baechle Elf32_Addr v) 461e01402b1SRalf Baechle { 462e01402b1SRalf Baechle unsigned long insnlo = *location; 463e01402b1SRalf Baechle Elf32_Addr val, vallo; 464477c4b07SRalf Baechle struct mips_hi16 *l, *next; 465e01402b1SRalf Baechle 466e01402b1SRalf Baechle /* Sign extend the addend we extract from the lo insn. */ 467e01402b1SRalf Baechle vallo = ((insnlo & 0xffff) ^ 0x8000) - 0x8000; 468e01402b1SRalf Baechle 469e01402b1SRalf Baechle if (mips_hi16_list != NULL) { 470e01402b1SRalf Baechle 471e01402b1SRalf Baechle l = mips_hi16_list; 472e01402b1SRalf Baechle while (l != NULL) { 473e01402b1SRalf Baechle unsigned long insn; 474e01402b1SRalf Baechle 475e01402b1SRalf Baechle /* 476e01402b1SRalf Baechle * The value for the HI16 had best be the same. 477e01402b1SRalf Baechle */ 478e01402b1SRalf Baechle if (v != l->value) { 4792600990eSRalf Baechle printk(KERN_DEBUG "VPE loader: " 480b1e3afa0SJoe Perches "apply_r_mips_lo16/hi16: \t" 4812600990eSRalf Baechle "inconsistent value information\n"); 482477c4b07SRalf Baechle goto out_free; 483e01402b1SRalf Baechle } 484e01402b1SRalf Baechle 485e01402b1SRalf Baechle /* 486e01402b1SRalf Baechle * Do the HI16 relocation. Note that we actually don't 487e01402b1SRalf Baechle * need to know anything about the LO16 itself, except 488e01402b1SRalf Baechle * where to find the low 16 bits of the addend needed 489e01402b1SRalf Baechle * by the LO16. 490e01402b1SRalf Baechle */ 491e01402b1SRalf Baechle insn = *l->addr; 492e01402b1SRalf Baechle val = ((insn & 0xffff) << 16) + vallo; 493e01402b1SRalf Baechle val += v; 494e01402b1SRalf Baechle 495e01402b1SRalf Baechle /* 496e01402b1SRalf Baechle * Account for the sign extension that will happen in 497e01402b1SRalf Baechle * the low bits. 498e01402b1SRalf Baechle */ 499e01402b1SRalf Baechle val = ((val >> 16) + ((val & 0x8000) != 0)) & 0xffff; 500e01402b1SRalf Baechle 501e01402b1SRalf Baechle insn = (insn & ~0xffff) | val; 502e01402b1SRalf Baechle *l->addr = insn; 503e01402b1SRalf Baechle 504e01402b1SRalf Baechle next = l->next; 505e01402b1SRalf Baechle kfree(l); 506e01402b1SRalf Baechle l = next; 507e01402b1SRalf Baechle } 508e01402b1SRalf Baechle 509e01402b1SRalf Baechle mips_hi16_list = NULL; 510e01402b1SRalf Baechle } 511e01402b1SRalf Baechle 512e01402b1SRalf Baechle /* 513e01402b1SRalf Baechle * Ok, we're done with the HI16 relocs. Now deal with the LO16. 514e01402b1SRalf Baechle */ 515e01402b1SRalf Baechle val = v + vallo; 516e01402b1SRalf Baechle insnlo = (insnlo & ~0xffff) | (val & 0xffff); 517e01402b1SRalf Baechle *location = insnlo; 518e01402b1SRalf Baechle 519e01402b1SRalf Baechle return 0; 520477c4b07SRalf Baechle 521477c4b07SRalf Baechle out_free: 522477c4b07SRalf Baechle while (l != NULL) { 523477c4b07SRalf Baechle next = l->next; 524477c4b07SRalf Baechle kfree(l); 525477c4b07SRalf Baechle l = next; 526477c4b07SRalf Baechle } 527477c4b07SRalf Baechle mips_hi16_list = NULL; 528477c4b07SRalf Baechle 529477c4b07SRalf Baechle return -ENOEXEC; 530e01402b1SRalf Baechle } 531e01402b1SRalf Baechle 532e01402b1SRalf Baechle static int (*reloc_handlers[]) (struct module *me, uint32_t *location, 533e01402b1SRalf Baechle Elf32_Addr v) = { 534e01402b1SRalf Baechle [R_MIPS_NONE] = apply_r_mips_none, 535e01402b1SRalf Baechle [R_MIPS_32] = apply_r_mips_32, 536e01402b1SRalf Baechle [R_MIPS_26] = apply_r_mips_26, 537e01402b1SRalf Baechle [R_MIPS_HI16] = apply_r_mips_hi16, 538e01402b1SRalf Baechle [R_MIPS_LO16] = apply_r_mips_lo16, 539e01402b1SRalf Baechle [R_MIPS_GPREL16] = apply_r_mips_gprel16, 540e01402b1SRalf Baechle [R_MIPS_PC16] = apply_r_mips_pc16 541e01402b1SRalf Baechle }; 542e01402b1SRalf Baechle 5432600990eSRalf Baechle static char *rstrs[] = { 5442600990eSRalf Baechle [R_MIPS_NONE] = "MIPS_NONE", 5452600990eSRalf Baechle [R_MIPS_32] = "MIPS_32", 5462600990eSRalf Baechle [R_MIPS_26] = "MIPS_26", 5472600990eSRalf Baechle [R_MIPS_HI16] = "MIPS_HI16", 5482600990eSRalf Baechle [R_MIPS_LO16] = "MIPS_LO16", 5492600990eSRalf Baechle [R_MIPS_GPREL16] = "MIPS_GPREL16", 5502600990eSRalf Baechle [R_MIPS_PC16] = "MIPS_PC16" 5512600990eSRalf Baechle }; 552e01402b1SRalf Baechle 553f18b51ccSRalf Baechle static int apply_relocations(Elf32_Shdr *sechdrs, 554e01402b1SRalf Baechle const char *strtab, 555e01402b1SRalf Baechle unsigned int symindex, 556e01402b1SRalf Baechle unsigned int relsec, 557e01402b1SRalf Baechle struct module *me) 558e01402b1SRalf Baechle { 559e01402b1SRalf Baechle Elf32_Rel *rel = (void *) sechdrs[relsec].sh_addr; 560e01402b1SRalf Baechle Elf32_Sym *sym; 561e01402b1SRalf Baechle uint32_t *location; 562e01402b1SRalf Baechle unsigned int i; 563e01402b1SRalf Baechle Elf32_Addr v; 564e01402b1SRalf Baechle int res; 565e01402b1SRalf Baechle 566e01402b1SRalf Baechle for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) { 567e01402b1SRalf Baechle Elf32_Word r_info = rel[i].r_info; 568e01402b1SRalf Baechle 569e01402b1SRalf Baechle /* This is where to make the change */ 570e01402b1SRalf Baechle location = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr 571e01402b1SRalf Baechle + rel[i].r_offset; 572e01402b1SRalf Baechle /* This is the symbol it is referring to */ 573e01402b1SRalf Baechle sym = (Elf32_Sym *)sechdrs[symindex].sh_addr 574e01402b1SRalf Baechle + ELF32_R_SYM(r_info); 575e01402b1SRalf Baechle 576e01402b1SRalf Baechle if (!sym->st_value) { 577e01402b1SRalf Baechle printk(KERN_DEBUG "%s: undefined weak symbol %s\n", 578e01402b1SRalf Baechle me->name, strtab + sym->st_name); 579e01402b1SRalf Baechle /* just print the warning, dont barf */ 580e01402b1SRalf Baechle } 581e01402b1SRalf Baechle 582e01402b1SRalf Baechle v = sym->st_value; 583e01402b1SRalf Baechle 584e01402b1SRalf Baechle res = reloc_handlers[ELF32_R_TYPE(r_info)](me, location, v); 585e01402b1SRalf Baechle if( res ) { 5862600990eSRalf Baechle char *r = rstrs[ELF32_R_TYPE(r_info)]; 5872600990eSRalf Baechle printk(KERN_WARNING "VPE loader: .text+0x%x " 5882600990eSRalf Baechle "relocation type %s for symbol \"%s\" failed\n", 5892600990eSRalf Baechle rel[i].r_offset, r ? r : "UNKNOWN", 5902600990eSRalf Baechle strtab + sym->st_name); 591e01402b1SRalf Baechle return res; 592e01402b1SRalf Baechle } 5932600990eSRalf Baechle } 594e01402b1SRalf Baechle 595e01402b1SRalf Baechle return 0; 596e01402b1SRalf Baechle } 597e01402b1SRalf Baechle 598f18b51ccSRalf Baechle static inline void save_gp_address(unsigned int secbase, unsigned int rel) 599e01402b1SRalf Baechle { 600e01402b1SRalf Baechle gp_addr = secbase + rel; 601e01402b1SRalf Baechle gp_offs = gp_addr - (secbase & 0xffff0000); 602e01402b1SRalf Baechle } 603e01402b1SRalf Baechle /* end module-elf32.c */ 604e01402b1SRalf Baechle 605e01402b1SRalf Baechle 606e01402b1SRalf Baechle 607e01402b1SRalf Baechle /* Change all symbols so that sh_value encodes the pointer directly. */ 6082600990eSRalf Baechle static void simplify_symbols(Elf_Shdr * sechdrs, 609e01402b1SRalf Baechle unsigned int symindex, 610e01402b1SRalf Baechle const char *strtab, 611e01402b1SRalf Baechle const char *secstrings, 612e01402b1SRalf Baechle unsigned int nsecs, struct module *mod) 613e01402b1SRalf Baechle { 614e01402b1SRalf Baechle Elf_Sym *sym = (void *)sechdrs[symindex].sh_addr; 615e01402b1SRalf Baechle unsigned long secbase, bssbase = 0; 616e01402b1SRalf Baechle unsigned int i, n = sechdrs[symindex].sh_size / sizeof(Elf_Sym); 6172600990eSRalf Baechle int size; 618e01402b1SRalf Baechle 619e01402b1SRalf Baechle /* find the .bss section for COMMON symbols */ 620e01402b1SRalf Baechle for (i = 0; i < nsecs; i++) { 6212600990eSRalf Baechle if (strncmp(secstrings + sechdrs[i].sh_name, ".bss", 4) == 0) { 622e01402b1SRalf Baechle bssbase = sechdrs[i].sh_addr; 6232600990eSRalf Baechle break; 6242600990eSRalf Baechle } 625e01402b1SRalf Baechle } 626e01402b1SRalf Baechle 627e01402b1SRalf Baechle for (i = 1; i < n; i++) { 628e01402b1SRalf Baechle switch (sym[i].st_shndx) { 629e01402b1SRalf Baechle case SHN_COMMON: 6302600990eSRalf Baechle /* Allocate space for the symbol in the .bss section. 6312600990eSRalf Baechle st_value is currently size. 632e01402b1SRalf Baechle We want it to have the address of the symbol. */ 633e01402b1SRalf Baechle 634e01402b1SRalf Baechle size = sym[i].st_value; 635e01402b1SRalf Baechle sym[i].st_value = bssbase; 636e01402b1SRalf Baechle 637e01402b1SRalf Baechle bssbase += size; 638e01402b1SRalf Baechle break; 639e01402b1SRalf Baechle 640e01402b1SRalf Baechle case SHN_ABS: 641e01402b1SRalf Baechle /* Don't need to do anything */ 642e01402b1SRalf Baechle break; 643e01402b1SRalf Baechle 644e01402b1SRalf Baechle case SHN_UNDEF: 645e01402b1SRalf Baechle /* ret = -ENOENT; */ 646e01402b1SRalf Baechle break; 647e01402b1SRalf Baechle 648e01402b1SRalf Baechle case SHN_MIPS_SCOMMON: 6492600990eSRalf Baechle printk(KERN_DEBUG "simplify_symbols: ignoring SHN_MIPS_SCOMMON " 6502600990eSRalf Baechle "symbol <%s> st_shndx %d\n", strtab + sym[i].st_name, 6512600990eSRalf Baechle sym[i].st_shndx); 652e01402b1SRalf Baechle // .sbss section 653e01402b1SRalf Baechle break; 654e01402b1SRalf Baechle 655e01402b1SRalf Baechle default: 656e01402b1SRalf Baechle secbase = sechdrs[sym[i].st_shndx].sh_addr; 657e01402b1SRalf Baechle 658e01402b1SRalf Baechle if (strncmp(strtab + sym[i].st_name, "_gp", 3) == 0) { 659e01402b1SRalf Baechle save_gp_address(secbase, sym[i].st_value); 660e01402b1SRalf Baechle } 661e01402b1SRalf Baechle 662e01402b1SRalf Baechle sym[i].st_value += secbase; 663e01402b1SRalf Baechle break; 664e01402b1SRalf Baechle } 665e01402b1SRalf Baechle } 666e01402b1SRalf Baechle } 667e01402b1SRalf Baechle 668e01402b1SRalf Baechle #ifdef DEBUG_ELFLOADER 669e01402b1SRalf Baechle static void dump_elfsymbols(Elf_Shdr * sechdrs, unsigned int symindex, 670e01402b1SRalf Baechle const char *strtab, struct module *mod) 671e01402b1SRalf Baechle { 672e01402b1SRalf Baechle Elf_Sym *sym = (void *)sechdrs[symindex].sh_addr; 673e01402b1SRalf Baechle unsigned int i, n = sechdrs[symindex].sh_size / sizeof(Elf_Sym); 674e01402b1SRalf Baechle 675e01402b1SRalf Baechle printk(KERN_DEBUG "dump_elfsymbols: n %d\n", n); 676e01402b1SRalf Baechle for (i = 1; i < n; i++) { 677e01402b1SRalf Baechle printk(KERN_DEBUG " i %d name <%s> 0x%x\n", i, 678e01402b1SRalf Baechle strtab + sym[i].st_name, sym[i].st_value); 679e01402b1SRalf Baechle } 680e01402b1SRalf Baechle } 681e01402b1SRalf Baechle #endif 682e01402b1SRalf Baechle 683e01402b1SRalf Baechle /* We are prepared so configure and start the VPE... */ 684be6e1437SRalf Baechle static int vpe_run(struct vpe * v) 685e01402b1SRalf Baechle { 68607cc0c9eSRalf Baechle unsigned long flags, val, dmt_flag; 6872600990eSRalf Baechle struct vpe_notifications *n; 68807cc0c9eSRalf Baechle unsigned int vpeflags; 689e01402b1SRalf Baechle struct tc *t; 690e01402b1SRalf Baechle 691e01402b1SRalf Baechle /* check we are the Master VPE */ 69207cc0c9eSRalf Baechle local_irq_save(flags); 693e01402b1SRalf Baechle val = read_c0_vpeconf0(); 694e01402b1SRalf Baechle if (!(val & VPECONF0_MVP)) { 695e01402b1SRalf Baechle printk(KERN_WARNING 6962600990eSRalf Baechle "VPE loader: only Master VPE's are allowed to configure MT\n"); 69707cc0c9eSRalf Baechle local_irq_restore(flags); 69807cc0c9eSRalf Baechle 699e01402b1SRalf Baechle return -1; 700e01402b1SRalf Baechle } 701e01402b1SRalf Baechle 70207cc0c9eSRalf Baechle dmt_flag = dmt(); 70307cc0c9eSRalf Baechle vpeflags = dvpe(); 704e01402b1SRalf Baechle 705e01402b1SRalf Baechle if (!list_empty(&v->tc)) { 706e01402b1SRalf Baechle if ((t = list_entry(v->tc.next, struct tc, tc)) == NULL) { 70707cc0c9eSRalf Baechle evpe(vpeflags); 70807cc0c9eSRalf Baechle emt(dmt_flag); 70907cc0c9eSRalf Baechle local_irq_restore(flags); 71007cc0c9eSRalf Baechle 71107cc0c9eSRalf Baechle printk(KERN_WARNING 71207cc0c9eSRalf Baechle "VPE loader: TC %d is already in use.\n", 713e01402b1SRalf Baechle t->index); 714e01402b1SRalf Baechle return -ENOEXEC; 715e01402b1SRalf Baechle } 716e01402b1SRalf Baechle } else { 71707cc0c9eSRalf Baechle evpe(vpeflags); 71807cc0c9eSRalf Baechle emt(dmt_flag); 71907cc0c9eSRalf Baechle local_irq_restore(flags); 72007cc0c9eSRalf Baechle 72107cc0c9eSRalf Baechle printk(KERN_WARNING 72207cc0c9eSRalf Baechle "VPE loader: No TC's associated with VPE %d\n", 723e01402b1SRalf Baechle v->minor); 72407cc0c9eSRalf Baechle 725e01402b1SRalf Baechle return -ENOEXEC; 726e01402b1SRalf Baechle } 727e01402b1SRalf Baechle 7282600990eSRalf Baechle /* Put MVPE's into 'configuration state' */ 7292600990eSRalf Baechle set_c0_mvpcontrol(MVPCONTROL_VPC); 730e01402b1SRalf Baechle 7312600990eSRalf Baechle settc(t->index); 732e01402b1SRalf Baechle 733e01402b1SRalf Baechle /* should check it is halted, and not activated */ 734e01402b1SRalf Baechle if ((read_tc_c0_tcstatus() & TCSTATUS_A) || !(read_tc_c0_tchalt() & TCHALT_H)) { 73507cc0c9eSRalf Baechle evpe(vpeflags); 73607cc0c9eSRalf Baechle emt(dmt_flag); 73707cc0c9eSRalf Baechle local_irq_restore(flags); 73807cc0c9eSRalf Baechle 73907cc0c9eSRalf Baechle printk(KERN_WARNING "VPE loader: TC %d is already active!\n", 740e01402b1SRalf Baechle t->index); 74107cc0c9eSRalf Baechle 742e01402b1SRalf Baechle return -ENOEXEC; 743e01402b1SRalf Baechle } 744e01402b1SRalf Baechle 745e01402b1SRalf Baechle /* Write the address we want it to start running from in the TCPC register. */ 746e01402b1SRalf Baechle write_tc_c0_tcrestart((unsigned long)v->__start); 747e01402b1SRalf Baechle write_tc_c0_tccontext((unsigned long)0); 74807cc0c9eSRalf Baechle 7492600990eSRalf Baechle /* 7502600990eSRalf Baechle * Mark the TC as activated, not interrupt exempt and not dynamically 7512600990eSRalf Baechle * allocatable 7522600990eSRalf Baechle */ 753e01402b1SRalf Baechle val = read_tc_c0_tcstatus(); 754e01402b1SRalf Baechle val = (val & ~(TCSTATUS_DA | TCSTATUS_IXMT)) | TCSTATUS_A; 755e01402b1SRalf Baechle write_tc_c0_tcstatus(val); 756e01402b1SRalf Baechle 757e01402b1SRalf Baechle write_tc_c0_tchalt(read_tc_c0_tchalt() & ~TCHALT_H); 758e01402b1SRalf Baechle 759e01402b1SRalf Baechle /* 760e01402b1SRalf Baechle * The sde-kit passes 'memsize' to __start in $a3, so set something 7612600990eSRalf Baechle * here... Or set $a3 to zero and define DFLT_STACK_SIZE and 762e01402b1SRalf Baechle * DFLT_HEAP_SIZE when you compile your program 763e01402b1SRalf Baechle */ 76441790e04SRalf Baechle mttgpr(6, v->ntcs); 7652600990eSRalf Baechle mttgpr(7, physical_memsize); 766e01402b1SRalf Baechle 7672600990eSRalf Baechle /* set up VPE1 */ 7682600990eSRalf Baechle /* 7692600990eSRalf Baechle * bind the TC to VPE 1 as late as possible so we only have the final 7702600990eSRalf Baechle * VPE registers to set up, and so an EJTAG probe can trigger on it 7712600990eSRalf Baechle */ 77207cc0c9eSRalf Baechle write_tc_c0_tcbind((read_tc_c0_tcbind() & ~TCBIND_CURVPE) | 1); 7732600990eSRalf Baechle 774a94d7020SElizabeth Oldham write_vpe_c0_vpeconf0(read_vpe_c0_vpeconf0() & ~(VPECONF0_VPA)); 775a94d7020SElizabeth Oldham 776a94d7020SElizabeth Oldham back_to_back_c0_hazard(); 777a94d7020SElizabeth Oldham 7782600990eSRalf Baechle /* Set up the XTC bit in vpeconf0 to point at our tc */ 7792600990eSRalf Baechle write_vpe_c0_vpeconf0( (read_vpe_c0_vpeconf0() & ~(VPECONF0_XTC)) 7802600990eSRalf Baechle | (t->index << VPECONF0_XTC_SHIFT)); 7812600990eSRalf Baechle 782a94d7020SElizabeth Oldham back_to_back_c0_hazard(); 783a94d7020SElizabeth Oldham 7842600990eSRalf Baechle /* enable this VPE */ 7852600990eSRalf Baechle write_vpe_c0_vpeconf0(read_vpe_c0_vpeconf0() | VPECONF0_VPA); 786e01402b1SRalf Baechle 787e01402b1SRalf Baechle /* clear out any left overs from a previous program */ 7882600990eSRalf Baechle write_vpe_c0_status(0); 789e01402b1SRalf Baechle write_vpe_c0_cause(0); 790e01402b1SRalf Baechle 791e01402b1SRalf Baechle /* take system out of configuration state */ 792340ee4b9SRalf Baechle clear_c0_mvpcontrol(MVPCONTROL_VPC); 793e01402b1SRalf Baechle 794b618336aSKevin D. Kissell /* 795b618336aSKevin D. Kissell * SMTC/SMVP kernels manage VPE enable independently, 796b618336aSKevin D. Kissell * but uniprocessor kernels need to turn it on, even 797b618336aSKevin D. Kissell * if that wasn't the pre-dvpe() state. 798b618336aSKevin D. Kissell */ 79907cc0c9eSRalf Baechle #ifdef CONFIG_SMP 80007cc0c9eSRalf Baechle evpe(vpeflags); 801b618336aSKevin D. Kissell #else 802b618336aSKevin D. Kissell evpe(EVPE_ENABLE); 80307cc0c9eSRalf Baechle #endif 80407cc0c9eSRalf Baechle emt(dmt_flag); 80507cc0c9eSRalf Baechle local_irq_restore(flags); 806e01402b1SRalf Baechle 80707cc0c9eSRalf Baechle list_for_each_entry(n, &v->notify, list) 80807cc0c9eSRalf Baechle n->start(minor); 8092600990eSRalf Baechle 810e01402b1SRalf Baechle return 0; 811e01402b1SRalf Baechle } 812e01402b1SRalf Baechle 8132600990eSRalf Baechle static int find_vpe_symbols(struct vpe * v, Elf_Shdr * sechdrs, 814e01402b1SRalf Baechle unsigned int symindex, const char *strtab, 815e01402b1SRalf Baechle struct module *mod) 816e01402b1SRalf Baechle { 817e01402b1SRalf Baechle Elf_Sym *sym = (void *)sechdrs[symindex].sh_addr; 818e01402b1SRalf Baechle unsigned int i, n = sechdrs[symindex].sh_size / sizeof(Elf_Sym); 819e01402b1SRalf Baechle 820e01402b1SRalf Baechle for (i = 1; i < n; i++) { 821e01402b1SRalf Baechle if (strcmp(strtab + sym[i].st_name, "__start") == 0) { 822e01402b1SRalf Baechle v->__start = sym[i].st_value; 823e01402b1SRalf Baechle } 824e01402b1SRalf Baechle 825e01402b1SRalf Baechle if (strcmp(strtab + sym[i].st_name, "vpe_shared") == 0) { 826e01402b1SRalf Baechle v->shared_ptr = (void *)sym[i].st_value; 827e01402b1SRalf Baechle } 828e01402b1SRalf Baechle } 829e01402b1SRalf Baechle 8302600990eSRalf Baechle if ( (v->__start == 0) || (v->shared_ptr == NULL)) 8312600990eSRalf Baechle return -1; 8322600990eSRalf Baechle 833e01402b1SRalf Baechle return 0; 834e01402b1SRalf Baechle } 835e01402b1SRalf Baechle 836307bd284SRalf Baechle /* 8372600990eSRalf Baechle * Allocates a VPE with some program code space(the load address), copies the 8382600990eSRalf Baechle * contents of the program (p)buffer performing relocatations/etc, free's it 8392600990eSRalf Baechle * when finished. 840e01402b1SRalf Baechle */ 841be6e1437SRalf Baechle static int vpe_elfload(struct vpe * v) 842e01402b1SRalf Baechle { 843e01402b1SRalf Baechle Elf_Ehdr *hdr; 844e01402b1SRalf Baechle Elf_Shdr *sechdrs; 845e01402b1SRalf Baechle long err = 0; 846e01402b1SRalf Baechle char *secstrings, *strtab = NULL; 8472600990eSRalf Baechle unsigned int len, i, symindex = 0, strindex = 0, relocate = 0; 848e01402b1SRalf Baechle struct module mod; // so we can re-use the relocations code 849e01402b1SRalf Baechle 850e01402b1SRalf Baechle memset(&mod, 0, sizeof(struct module)); 8512600990eSRalf Baechle strcpy(mod.name, "VPE loader"); 852e01402b1SRalf Baechle 853e01402b1SRalf Baechle hdr = (Elf_Ehdr *) v->pbuffer; 854e01402b1SRalf Baechle len = v->plen; 855e01402b1SRalf Baechle 856e01402b1SRalf Baechle /* Sanity checks against insmoding binaries or wrong arch, 857e01402b1SRalf Baechle weird elf version */ 858d303f4a1SCyrill Gorcunov if (memcmp(hdr->e_ident, ELFMAG, SELFMAG) != 0 8592600990eSRalf Baechle || (hdr->e_type != ET_REL && hdr->e_type != ET_EXEC) 8602600990eSRalf Baechle || !elf_check_arch(hdr) 861e01402b1SRalf Baechle || hdr->e_shentsize != sizeof(*sechdrs)) { 862e01402b1SRalf Baechle printk(KERN_WARNING 8632600990eSRalf Baechle "VPE loader: program wrong arch or weird elf version\n"); 864e01402b1SRalf Baechle 865e01402b1SRalf Baechle return -ENOEXEC; 866e01402b1SRalf Baechle } 867e01402b1SRalf Baechle 8682600990eSRalf Baechle if (hdr->e_type == ET_REL) 8692600990eSRalf Baechle relocate = 1; 8702600990eSRalf Baechle 871e01402b1SRalf Baechle if (len < hdr->e_shoff + hdr->e_shnum * sizeof(Elf_Shdr)) { 8722600990eSRalf Baechle printk(KERN_ERR "VPE loader: program length %u truncated\n", 8732600990eSRalf Baechle len); 8742600990eSRalf Baechle 875e01402b1SRalf Baechle return -ENOEXEC; 876e01402b1SRalf Baechle } 877e01402b1SRalf Baechle 878e01402b1SRalf Baechle /* Convenience variables */ 879e01402b1SRalf Baechle sechdrs = (void *)hdr + hdr->e_shoff; 880e01402b1SRalf Baechle secstrings = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset; 881e01402b1SRalf Baechle sechdrs[0].sh_addr = 0; 882e01402b1SRalf Baechle 883e01402b1SRalf Baechle /* And these should exist, but gcc whinges if we don't init them */ 884e01402b1SRalf Baechle symindex = strindex = 0; 885e01402b1SRalf Baechle 8862600990eSRalf Baechle if (relocate) { 887e01402b1SRalf Baechle for (i = 1; i < hdr->e_shnum; i++) { 888e01402b1SRalf Baechle if (sechdrs[i].sh_type != SHT_NOBITS 889e01402b1SRalf Baechle && len < sechdrs[i].sh_offset + sechdrs[i].sh_size) { 890e01402b1SRalf Baechle printk(KERN_ERR "VPE program length %u truncated\n", 891e01402b1SRalf Baechle len); 892e01402b1SRalf Baechle return -ENOEXEC; 893e01402b1SRalf Baechle } 894e01402b1SRalf Baechle 895e01402b1SRalf Baechle /* Mark all sections sh_addr with their address in the 896e01402b1SRalf Baechle temporary image. */ 897e01402b1SRalf Baechle sechdrs[i].sh_addr = (size_t) hdr + sechdrs[i].sh_offset; 898e01402b1SRalf Baechle 899e01402b1SRalf Baechle /* Internal symbols and strings. */ 900e01402b1SRalf Baechle if (sechdrs[i].sh_type == SHT_SYMTAB) { 901e01402b1SRalf Baechle symindex = i; 902e01402b1SRalf Baechle strindex = sechdrs[i].sh_link; 903e01402b1SRalf Baechle strtab = (char *)hdr + sechdrs[strindex].sh_offset; 904e01402b1SRalf Baechle } 905e01402b1SRalf Baechle } 906e01402b1SRalf Baechle layout_sections(&mod, hdr, sechdrs, secstrings); 9072600990eSRalf Baechle } 908e01402b1SRalf Baechle 909e01402b1SRalf Baechle v->load_addr = alloc_progmem(mod.core_size); 9105408c490SRalf Baechle if (!v->load_addr) 9115408c490SRalf Baechle return -ENOMEM; 912e01402b1SRalf Baechle 9135408c490SRalf Baechle pr_info("VPE loader: loading to %p\n", v->load_addr); 914e01402b1SRalf Baechle 9152600990eSRalf Baechle if (relocate) { 916e01402b1SRalf Baechle for (i = 0; i < hdr->e_shnum; i++) { 917e01402b1SRalf Baechle void *dest; 918e01402b1SRalf Baechle 919e01402b1SRalf Baechle if (!(sechdrs[i].sh_flags & SHF_ALLOC)) 920e01402b1SRalf Baechle continue; 921e01402b1SRalf Baechle 922e01402b1SRalf Baechle dest = v->load_addr + sechdrs[i].sh_entsize; 923e01402b1SRalf Baechle 924e01402b1SRalf Baechle if (sechdrs[i].sh_type != SHT_NOBITS) 925e01402b1SRalf Baechle memcpy(dest, (void *)sechdrs[i].sh_addr, 926e01402b1SRalf Baechle sechdrs[i].sh_size); 927e01402b1SRalf Baechle /* Update sh_addr to point to copy in image. */ 928e01402b1SRalf Baechle sechdrs[i].sh_addr = (unsigned long)dest; 9292600990eSRalf Baechle 9302600990eSRalf Baechle printk(KERN_DEBUG " section sh_name %s sh_addr 0x%x\n", 9312600990eSRalf Baechle secstrings + sechdrs[i].sh_name, sechdrs[i].sh_addr); 932e01402b1SRalf Baechle } 933e01402b1SRalf Baechle 934e01402b1SRalf Baechle /* Fix up syms, so that st_value is a pointer to location. */ 935e01402b1SRalf Baechle simplify_symbols(sechdrs, symindex, strtab, secstrings, 936e01402b1SRalf Baechle hdr->e_shnum, &mod); 937e01402b1SRalf Baechle 938e01402b1SRalf Baechle /* Now do relocations. */ 939e01402b1SRalf Baechle for (i = 1; i < hdr->e_shnum; i++) { 940e01402b1SRalf Baechle const char *strtab = (char *)sechdrs[strindex].sh_addr; 941e01402b1SRalf Baechle unsigned int info = sechdrs[i].sh_info; 942e01402b1SRalf Baechle 943e01402b1SRalf Baechle /* Not a valid relocation section? */ 944e01402b1SRalf Baechle if (info >= hdr->e_shnum) 945e01402b1SRalf Baechle continue; 946e01402b1SRalf Baechle 947e01402b1SRalf Baechle /* Don't bother with non-allocated sections */ 948e01402b1SRalf Baechle if (!(sechdrs[info].sh_flags & SHF_ALLOC)) 949e01402b1SRalf Baechle continue; 950e01402b1SRalf Baechle 951e01402b1SRalf Baechle if (sechdrs[i].sh_type == SHT_REL) 9522600990eSRalf Baechle err = apply_relocations(sechdrs, strtab, symindex, i, 9532600990eSRalf Baechle &mod); 954e01402b1SRalf Baechle else if (sechdrs[i].sh_type == SHT_RELA) 955e01402b1SRalf Baechle err = apply_relocate_add(sechdrs, strtab, symindex, i, 956e01402b1SRalf Baechle &mod); 9572600990eSRalf Baechle if (err < 0) 9582600990eSRalf Baechle return err; 9592600990eSRalf Baechle 9602600990eSRalf Baechle } 9612600990eSRalf Baechle } else { 962bdf5d42cSRalf Baechle struct elf_phdr *phdr = (struct elf_phdr *) ((char *)hdr + hdr->e_phoff); 9632600990eSRalf Baechle 964bdf5d42cSRalf Baechle for (i = 0; i < hdr->e_phnum; i++) { 965b618336aSKevin D. Kissell if (phdr->p_type == PT_LOAD) { 966b618336aSKevin D. Kissell memcpy((void *)phdr->p_paddr, 967b618336aSKevin D. Kissell (char *)hdr + phdr->p_offset, 968b618336aSKevin D. Kissell phdr->p_filesz); 969b618336aSKevin D. Kissell memset((void *)phdr->p_paddr + phdr->p_filesz, 970b618336aSKevin D. Kissell 0, phdr->p_memsz - phdr->p_filesz); 971b618336aSKevin D. Kissell } 972bdf5d42cSRalf Baechle phdr++; 973bdf5d42cSRalf Baechle } 974bdf5d42cSRalf Baechle 975bdf5d42cSRalf Baechle for (i = 0; i < hdr->e_shnum; i++) { 9762600990eSRalf Baechle /* Internal symbols and strings. */ 9772600990eSRalf Baechle if (sechdrs[i].sh_type == SHT_SYMTAB) { 9782600990eSRalf Baechle symindex = i; 9792600990eSRalf Baechle strindex = sechdrs[i].sh_link; 9802600990eSRalf Baechle strtab = (char *)hdr + sechdrs[strindex].sh_offset; 9812600990eSRalf Baechle 9822600990eSRalf Baechle /* mark the symtab's address for when we try to find the 9832600990eSRalf Baechle magic symbols */ 9842600990eSRalf Baechle sechdrs[i].sh_addr = (size_t) hdr + sechdrs[i].sh_offset; 9852600990eSRalf Baechle } 986e01402b1SRalf Baechle } 987e01402b1SRalf Baechle } 988e01402b1SRalf Baechle 989e01402b1SRalf Baechle /* make sure it's physically written out */ 990e01402b1SRalf Baechle flush_icache_range((unsigned long)v->load_addr, 991e01402b1SRalf Baechle (unsigned long)v->load_addr + v->len); 992e01402b1SRalf Baechle 993e01402b1SRalf Baechle if ((find_vpe_symbols(v, sechdrs, symindex, strtab, &mod)) < 0) { 9942600990eSRalf Baechle if (v->__start == 0) { 9952600990eSRalf Baechle printk(KERN_WARNING "VPE loader: program does not contain " 9962600990eSRalf Baechle "a __start symbol\n"); 9972600990eSRalf Baechle return -ENOEXEC; 9982600990eSRalf Baechle } 999e01402b1SRalf Baechle 10002600990eSRalf Baechle if (v->shared_ptr == NULL) 10012600990eSRalf Baechle printk(KERN_WARNING "VPE loader: " 10022600990eSRalf Baechle "program does not contain vpe_shared symbol.\n" 10032600990eSRalf Baechle " Unable to use AMVP (AP/SP) facilities.\n"); 1004e01402b1SRalf Baechle } 1005e01402b1SRalf Baechle 1006e01402b1SRalf Baechle printk(" elf loaded\n"); 10072600990eSRalf Baechle return 0; 1008e01402b1SRalf Baechle } 1009e01402b1SRalf Baechle 10102600990eSRalf Baechle static void cleanup_tc(struct tc *tc) 1011e01402b1SRalf Baechle { 101207cc0c9eSRalf Baechle unsigned long flags; 101307cc0c9eSRalf Baechle unsigned int mtflags, vpflags; 10142600990eSRalf Baechle int tmp; 1015e01402b1SRalf Baechle 101607cc0c9eSRalf Baechle local_irq_save(flags); 101707cc0c9eSRalf Baechle mtflags = dmt(); 101807cc0c9eSRalf Baechle vpflags = dvpe(); 10192600990eSRalf Baechle /* Put MVPE's into 'configuration state' */ 10202600990eSRalf Baechle set_c0_mvpcontrol(MVPCONTROL_VPC); 1021e01402b1SRalf Baechle 10222600990eSRalf Baechle settc(tc->index); 1023e01402b1SRalf Baechle tmp = read_tc_c0_tcstatus(); 1024e01402b1SRalf Baechle 1025e01402b1SRalf Baechle /* mark not allocated and not dynamically allocatable */ 1026e01402b1SRalf Baechle tmp &= ~(TCSTATUS_A | TCSTATUS_DA); 1027e01402b1SRalf Baechle tmp |= TCSTATUS_IXMT; /* interrupt exempt */ 1028e01402b1SRalf Baechle write_tc_c0_tcstatus(tmp); 1029e01402b1SRalf Baechle 1030e01402b1SRalf Baechle write_tc_c0_tchalt(TCHALT_H); 10317c3a622dSNigel Stephens mips_ihb(); 1032e01402b1SRalf Baechle 10332600990eSRalf Baechle /* bind it to anything other than VPE1 */ 103407cc0c9eSRalf Baechle // write_tc_c0_tcbind(read_tc_c0_tcbind() & ~TCBIND_CURVPE); // | TCBIND_CURVPE 10352600990eSRalf Baechle 10362600990eSRalf Baechle clear_c0_mvpcontrol(MVPCONTROL_VPC); 103707cc0c9eSRalf Baechle evpe(vpflags); 103807cc0c9eSRalf Baechle emt(mtflags); 103907cc0c9eSRalf Baechle local_irq_restore(flags); 10402600990eSRalf Baechle } 10412600990eSRalf Baechle 10422600990eSRalf Baechle static int getcwd(char *buff, int size) 10432600990eSRalf Baechle { 10442600990eSRalf Baechle mm_segment_t old_fs; 10452600990eSRalf Baechle int ret; 10462600990eSRalf Baechle 10472600990eSRalf Baechle old_fs = get_fs(); 10482600990eSRalf Baechle set_fs(KERNEL_DS); 10492600990eSRalf Baechle 10502600990eSRalf Baechle ret = sys_getcwd(buff, size); 10512600990eSRalf Baechle 10522600990eSRalf Baechle set_fs(old_fs); 10532600990eSRalf Baechle 10542600990eSRalf Baechle return ret; 10552600990eSRalf Baechle } 10562600990eSRalf Baechle 10572600990eSRalf Baechle /* checks VPE is unused and gets ready to load program */ 10582600990eSRalf Baechle static int vpe_open(struct inode *inode, struct file *filp) 10592600990eSRalf Baechle { 1060c4c4018bSRalf Baechle enum vpe_state state; 10612600990eSRalf Baechle struct vpe_notifications *not; 106207cc0c9eSRalf Baechle struct vpe *v; 10637558da94SJonathan Corbet int ret, err = 0; 10642600990eSRalf Baechle 10657558da94SJonathan Corbet lock_kernel(); 106607cc0c9eSRalf Baechle if (minor != iminor(inode)) { 106707cc0c9eSRalf Baechle /* assume only 1 device at the moment. */ 10682600990eSRalf Baechle printk(KERN_WARNING "VPE loader: only vpe1 is supported\n"); 10697558da94SJonathan Corbet err = -ENODEV; 10707558da94SJonathan Corbet goto out; 10712600990eSRalf Baechle } 10722600990eSRalf Baechle 107307cc0c9eSRalf Baechle if ((v = get_vpe(tclimit)) == NULL) { 10742600990eSRalf Baechle printk(KERN_WARNING "VPE loader: unable to get vpe\n"); 10757558da94SJonathan Corbet err = -ENODEV; 10767558da94SJonathan Corbet goto out; 10772600990eSRalf Baechle } 10782600990eSRalf Baechle 1079c4c4018bSRalf Baechle state = xchg(&v->state, VPE_STATE_INUSE); 1080c4c4018bSRalf Baechle if (state != VPE_STATE_UNUSED) { 10812600990eSRalf Baechle printk(KERN_DEBUG "VPE loader: tc in use dumping regs\n"); 10822600990eSRalf Baechle 10832600990eSRalf Baechle list_for_each_entry(not, &v->notify, list) { 108407cc0c9eSRalf Baechle not->stop(tclimit); 10852600990eSRalf Baechle } 10862600990eSRalf Baechle 10872600990eSRalf Baechle release_progmem(v->load_addr); 108807cc0c9eSRalf Baechle cleanup_tc(get_tc(tclimit)); 1089e01402b1SRalf Baechle } 1090e01402b1SRalf Baechle 1091e01402b1SRalf Baechle /* this of-course trashes what was there before... */ 1092e01402b1SRalf Baechle v->pbuffer = vmalloc(P_SIZE); 1093e01402b1SRalf Baechle v->plen = P_SIZE; 1094e01402b1SRalf Baechle v->load_addr = NULL; 1095e01402b1SRalf Baechle v->len = 0; 1096e01402b1SRalf Baechle 1097d76b0d9bSDavid Howells v->uid = filp->f_cred->fsuid; 1098d76b0d9bSDavid Howells v->gid = filp->f_cred->fsgid; 10992600990eSRalf Baechle 11002600990eSRalf Baechle #ifdef CONFIG_MIPS_APSP_KSPD 11012600990eSRalf Baechle /* get kspd to tell us when a syscall_exit happens */ 11022600990eSRalf Baechle if (!kspd_events_reqd) { 11032600990eSRalf Baechle kspd_notify(&kspd_events); 11042600990eSRalf Baechle kspd_events_reqd++; 11052600990eSRalf Baechle } 11062600990eSRalf Baechle #endif 11072600990eSRalf Baechle 11082600990eSRalf Baechle v->cwd[0] = 0; 11092600990eSRalf Baechle ret = getcwd(v->cwd, VPE_PATH_MAX); 11102600990eSRalf Baechle if (ret < 0) 11112600990eSRalf Baechle printk(KERN_WARNING "VPE loader: open, getcwd returned %d\n", ret); 11122600990eSRalf Baechle 11132600990eSRalf Baechle v->shared_ptr = NULL; 11142600990eSRalf Baechle v->__start = 0; 111507cc0c9eSRalf Baechle 11167558da94SJonathan Corbet out: 11177558da94SJonathan Corbet unlock_kernel(); 1118e01402b1SRalf Baechle return 0; 1119e01402b1SRalf Baechle } 1120e01402b1SRalf Baechle 1121e01402b1SRalf Baechle static int vpe_release(struct inode *inode, struct file *filp) 1122e01402b1SRalf Baechle { 1123307bd284SRalf Baechle struct vpe *v; 1124e01402b1SRalf Baechle Elf_Ehdr *hdr; 112507cc0c9eSRalf Baechle int ret = 0; 1126e01402b1SRalf Baechle 112707cc0c9eSRalf Baechle v = get_vpe(tclimit); 112807cc0c9eSRalf Baechle if (v == NULL) 1129e01402b1SRalf Baechle return -ENODEV; 1130e01402b1SRalf Baechle 1131e01402b1SRalf Baechle hdr = (Elf_Ehdr *) v->pbuffer; 1132d303f4a1SCyrill Gorcunov if (memcmp(hdr->e_ident, ELFMAG, SELFMAG) == 0) { 113307cc0c9eSRalf Baechle if (vpe_elfload(v) >= 0) { 1134e01402b1SRalf Baechle vpe_run(v); 113507cc0c9eSRalf Baechle } else { 11362600990eSRalf Baechle printk(KERN_WARNING "VPE loader: ELF load failed.\n"); 1137e01402b1SRalf Baechle ret = -ENOEXEC; 1138e01402b1SRalf Baechle } 1139e01402b1SRalf Baechle } else { 11402600990eSRalf Baechle printk(KERN_WARNING "VPE loader: only elf files are supported\n"); 1141e01402b1SRalf Baechle ret = -ENOEXEC; 1142e01402b1SRalf Baechle } 1143e01402b1SRalf Baechle 11442600990eSRalf Baechle /* It's good to be able to run the SP and if it chokes have a look at 11452600990eSRalf Baechle the /dev/rt?. But if we reset the pointer to the shared struct we 11468ebcfc8bSNick Andrew lose what has happened. So perhaps if garbage is sent to the vpe 11472600990eSRalf Baechle device, use it as a trigger for the reset. Hopefully a nice 11482600990eSRalf Baechle executable will be along shortly. */ 11492600990eSRalf Baechle if (ret < 0) 11502600990eSRalf Baechle v->shared_ptr = NULL; 11512600990eSRalf Baechle 1152e01402b1SRalf Baechle // cleanup any temp buffers 1153e01402b1SRalf Baechle if (v->pbuffer) 1154e01402b1SRalf Baechle vfree(v->pbuffer); 1155e01402b1SRalf Baechle v->plen = 0; 1156e01402b1SRalf Baechle return ret; 1157e01402b1SRalf Baechle } 1158e01402b1SRalf Baechle 1159e01402b1SRalf Baechle static ssize_t vpe_write(struct file *file, const char __user * buffer, 1160e01402b1SRalf Baechle size_t count, loff_t * ppos) 1161e01402b1SRalf Baechle { 1162e01402b1SRalf Baechle size_t ret = count; 1163307bd284SRalf Baechle struct vpe *v; 1164e01402b1SRalf Baechle 116507cc0c9eSRalf Baechle if (iminor(file->f_path.dentry->d_inode) != minor) 116607cc0c9eSRalf Baechle return -ENODEV; 116707cc0c9eSRalf Baechle 116807cc0c9eSRalf Baechle v = get_vpe(tclimit); 116907cc0c9eSRalf Baechle if (v == NULL) 1170e01402b1SRalf Baechle return -ENODEV; 1171e01402b1SRalf Baechle 1172e01402b1SRalf Baechle if (v->pbuffer == NULL) { 11732600990eSRalf Baechle printk(KERN_ERR "VPE loader: no buffer for program\n"); 1174e01402b1SRalf Baechle return -ENOMEM; 1175e01402b1SRalf Baechle } 1176e01402b1SRalf Baechle 1177e01402b1SRalf Baechle if ((count + v->len) > v->plen) { 1178e01402b1SRalf Baechle printk(KERN_WARNING 11792600990eSRalf Baechle "VPE loader: elf size too big. Perhaps strip uneeded symbols\n"); 1180e01402b1SRalf Baechle return -ENOMEM; 1181e01402b1SRalf Baechle } 1182e01402b1SRalf Baechle 1183e01402b1SRalf Baechle count -= copy_from_user(v->pbuffer + v->len, buffer, count); 11842600990eSRalf Baechle if (!count) 1185e01402b1SRalf Baechle return -EFAULT; 1186e01402b1SRalf Baechle 1187e01402b1SRalf Baechle v->len += count; 1188e01402b1SRalf Baechle return ret; 1189e01402b1SRalf Baechle } 1190e01402b1SRalf Baechle 11915dfe4c96SArjan van de Ven static const struct file_operations vpe_fops = { 1192e01402b1SRalf Baechle .owner = THIS_MODULE, 1193e01402b1SRalf Baechle .open = vpe_open, 1194e01402b1SRalf Baechle .release = vpe_release, 1195e01402b1SRalf Baechle .write = vpe_write 1196e01402b1SRalf Baechle }; 1197e01402b1SRalf Baechle 1198e01402b1SRalf Baechle /* module wrapper entry points */ 1199e01402b1SRalf Baechle /* give me a vpe */ 1200e01402b1SRalf Baechle vpe_handle vpe_alloc(void) 1201e01402b1SRalf Baechle { 1202e01402b1SRalf Baechle int i; 1203e01402b1SRalf Baechle struct vpe *v; 1204e01402b1SRalf Baechle 1205e01402b1SRalf Baechle /* find a vpe */ 1206e01402b1SRalf Baechle for (i = 1; i < MAX_VPES; i++) { 1207e01402b1SRalf Baechle if ((v = get_vpe(i)) != NULL) { 1208e01402b1SRalf Baechle v->state = VPE_STATE_INUSE; 1209e01402b1SRalf Baechle return v; 1210e01402b1SRalf Baechle } 1211e01402b1SRalf Baechle } 1212e01402b1SRalf Baechle return NULL; 1213e01402b1SRalf Baechle } 1214e01402b1SRalf Baechle 1215e01402b1SRalf Baechle EXPORT_SYMBOL(vpe_alloc); 1216e01402b1SRalf Baechle 1217e01402b1SRalf Baechle /* start running from here */ 1218e01402b1SRalf Baechle int vpe_start(vpe_handle vpe, unsigned long start) 1219e01402b1SRalf Baechle { 1220e01402b1SRalf Baechle struct vpe *v = vpe; 1221e01402b1SRalf Baechle 1222e01402b1SRalf Baechle v->__start = start; 1223e01402b1SRalf Baechle return vpe_run(v); 1224e01402b1SRalf Baechle } 1225e01402b1SRalf Baechle 1226e01402b1SRalf Baechle EXPORT_SYMBOL(vpe_start); 1227e01402b1SRalf Baechle 1228e01402b1SRalf Baechle /* halt it for now */ 1229e01402b1SRalf Baechle int vpe_stop(vpe_handle vpe) 1230e01402b1SRalf Baechle { 1231e01402b1SRalf Baechle struct vpe *v = vpe; 1232e01402b1SRalf Baechle struct tc *t; 1233e01402b1SRalf Baechle unsigned int evpe_flags; 1234e01402b1SRalf Baechle 1235e01402b1SRalf Baechle evpe_flags = dvpe(); 1236e01402b1SRalf Baechle 1237e01402b1SRalf Baechle if ((t = list_entry(v->tc.next, struct tc, tc)) != NULL) { 1238e01402b1SRalf Baechle 1239e01402b1SRalf Baechle settc(t->index); 1240e01402b1SRalf Baechle write_vpe_c0_vpeconf0(read_vpe_c0_vpeconf0() & ~VPECONF0_VPA); 1241e01402b1SRalf Baechle } 1242e01402b1SRalf Baechle 1243e01402b1SRalf Baechle evpe(evpe_flags); 1244e01402b1SRalf Baechle 1245e01402b1SRalf Baechle return 0; 1246e01402b1SRalf Baechle } 1247e01402b1SRalf Baechle 1248e01402b1SRalf Baechle EXPORT_SYMBOL(vpe_stop); 1249e01402b1SRalf Baechle 1250e01402b1SRalf Baechle /* I've done with it thank you */ 1251e01402b1SRalf Baechle int vpe_free(vpe_handle vpe) 1252e01402b1SRalf Baechle { 1253e01402b1SRalf Baechle struct vpe *v = vpe; 1254e01402b1SRalf Baechle struct tc *t; 1255e01402b1SRalf Baechle unsigned int evpe_flags; 1256e01402b1SRalf Baechle 1257e01402b1SRalf Baechle if ((t = list_entry(v->tc.next, struct tc, tc)) == NULL) { 1258e01402b1SRalf Baechle return -ENOEXEC; 1259e01402b1SRalf Baechle } 1260e01402b1SRalf Baechle 1261e01402b1SRalf Baechle evpe_flags = dvpe(); 1262e01402b1SRalf Baechle 1263e01402b1SRalf Baechle /* Put MVPE's into 'configuration state' */ 1264340ee4b9SRalf Baechle set_c0_mvpcontrol(MVPCONTROL_VPC); 1265e01402b1SRalf Baechle 1266e01402b1SRalf Baechle settc(t->index); 1267e01402b1SRalf Baechle write_vpe_c0_vpeconf0(read_vpe_c0_vpeconf0() & ~VPECONF0_VPA); 1268e01402b1SRalf Baechle 12697c3a622dSNigel Stephens /* halt the TC */ 1270e01402b1SRalf Baechle write_tc_c0_tchalt(TCHALT_H); 12717c3a622dSNigel Stephens mips_ihb(); 12727c3a622dSNigel Stephens 12737c3a622dSNigel Stephens /* mark the TC unallocated */ 12747c3a622dSNigel Stephens write_tc_c0_tcstatus(read_tc_c0_tcstatus() & ~TCSTATUS_A); 1275e01402b1SRalf Baechle 1276e01402b1SRalf Baechle v->state = VPE_STATE_UNUSED; 1277e01402b1SRalf Baechle 1278340ee4b9SRalf Baechle clear_c0_mvpcontrol(MVPCONTROL_VPC); 1279e01402b1SRalf Baechle evpe(evpe_flags); 1280e01402b1SRalf Baechle 1281e01402b1SRalf Baechle return 0; 1282e01402b1SRalf Baechle } 1283e01402b1SRalf Baechle 1284e01402b1SRalf Baechle EXPORT_SYMBOL(vpe_free); 1285e01402b1SRalf Baechle 1286e01402b1SRalf Baechle void *vpe_get_shared(int index) 1287e01402b1SRalf Baechle { 1288e01402b1SRalf Baechle struct vpe *v; 1289e01402b1SRalf Baechle 12902600990eSRalf Baechle if ((v = get_vpe(index)) == NULL) 1291e01402b1SRalf Baechle return NULL; 1292e01402b1SRalf Baechle 1293e01402b1SRalf Baechle return v->shared_ptr; 1294e01402b1SRalf Baechle } 1295e01402b1SRalf Baechle 1296e01402b1SRalf Baechle EXPORT_SYMBOL(vpe_get_shared); 1297e01402b1SRalf Baechle 12982600990eSRalf Baechle int vpe_getuid(int index) 12992600990eSRalf Baechle { 13002600990eSRalf Baechle struct vpe *v; 13012600990eSRalf Baechle 13022600990eSRalf Baechle if ((v = get_vpe(index)) == NULL) 13032600990eSRalf Baechle return -1; 13042600990eSRalf Baechle 13052600990eSRalf Baechle return v->uid; 13062600990eSRalf Baechle } 13072600990eSRalf Baechle 13082600990eSRalf Baechle EXPORT_SYMBOL(vpe_getuid); 13092600990eSRalf Baechle 13102600990eSRalf Baechle int vpe_getgid(int index) 13112600990eSRalf Baechle { 13122600990eSRalf Baechle struct vpe *v; 13132600990eSRalf Baechle 13142600990eSRalf Baechle if ((v = get_vpe(index)) == NULL) 13152600990eSRalf Baechle return -1; 13162600990eSRalf Baechle 13172600990eSRalf Baechle return v->gid; 13182600990eSRalf Baechle } 13192600990eSRalf Baechle 13202600990eSRalf Baechle EXPORT_SYMBOL(vpe_getgid); 13212600990eSRalf Baechle 13222600990eSRalf Baechle int vpe_notify(int index, struct vpe_notifications *notify) 13232600990eSRalf Baechle { 13242600990eSRalf Baechle struct vpe *v; 13252600990eSRalf Baechle 13262600990eSRalf Baechle if ((v = get_vpe(index)) == NULL) 13272600990eSRalf Baechle return -1; 13282600990eSRalf Baechle 13292600990eSRalf Baechle list_add(¬ify->list, &v->notify); 13302600990eSRalf Baechle return 0; 13312600990eSRalf Baechle } 13322600990eSRalf Baechle 13332600990eSRalf Baechle EXPORT_SYMBOL(vpe_notify); 13342600990eSRalf Baechle 13352600990eSRalf Baechle char *vpe_getcwd(int index) 13362600990eSRalf Baechle { 13372600990eSRalf Baechle struct vpe *v; 13382600990eSRalf Baechle 13392600990eSRalf Baechle if ((v = get_vpe(index)) == NULL) 13402600990eSRalf Baechle return NULL; 13412600990eSRalf Baechle 13422600990eSRalf Baechle return v->cwd; 13432600990eSRalf Baechle } 13442600990eSRalf Baechle 13452600990eSRalf Baechle EXPORT_SYMBOL(vpe_getcwd); 13462600990eSRalf Baechle 13472600990eSRalf Baechle #ifdef CONFIG_MIPS_APSP_KSPD 13482600990eSRalf Baechle static void kspd_sp_exit( int sp_id) 13492600990eSRalf Baechle { 13502600990eSRalf Baechle cleanup_tc(get_tc(sp_id)); 13512600990eSRalf Baechle } 13522600990eSRalf Baechle #endif 13532600990eSRalf Baechle 1354736fad17SKay Sievers static ssize_t store_kill(struct device *dev, struct device_attribute *attr, 1355736fad17SKay Sievers const char *buf, size_t len) 13560f5d0df3SRalf Baechle { 13570f5d0df3SRalf Baechle struct vpe *vpe = get_vpe(tclimit); 13580f5d0df3SRalf Baechle struct vpe_notifications *not; 13590f5d0df3SRalf Baechle 13600f5d0df3SRalf Baechle list_for_each_entry(not, &vpe->notify, list) { 13610f5d0df3SRalf Baechle not->stop(tclimit); 13620f5d0df3SRalf Baechle } 13630f5d0df3SRalf Baechle 13640f5d0df3SRalf Baechle release_progmem(vpe->load_addr); 13650f5d0df3SRalf Baechle cleanup_tc(get_tc(tclimit)); 13660f5d0df3SRalf Baechle vpe_stop(vpe); 13670f5d0df3SRalf Baechle vpe_free(vpe); 13680f5d0df3SRalf Baechle 13690f5d0df3SRalf Baechle return len; 13700f5d0df3SRalf Baechle } 13710f5d0df3SRalf Baechle 1372736fad17SKay Sievers static ssize_t show_ntcs(struct device *cd, struct device_attribute *attr, 1373736fad17SKay Sievers char *buf) 137441790e04SRalf Baechle { 137541790e04SRalf Baechle struct vpe *vpe = get_vpe(tclimit); 137641790e04SRalf Baechle 137741790e04SRalf Baechle return sprintf(buf, "%d\n", vpe->ntcs); 137841790e04SRalf Baechle } 137941790e04SRalf Baechle 1380736fad17SKay Sievers static ssize_t store_ntcs(struct device *dev, struct device_attribute *attr, 1381736fad17SKay Sievers const char *buf, size_t len) 138241790e04SRalf Baechle { 138341790e04SRalf Baechle struct vpe *vpe = get_vpe(tclimit); 138441790e04SRalf Baechle unsigned long new; 138541790e04SRalf Baechle char *endp; 138641790e04SRalf Baechle 138741790e04SRalf Baechle new = simple_strtoul(buf, &endp, 0); 138841790e04SRalf Baechle if (endp == buf) 138941790e04SRalf Baechle goto out_einval; 139041790e04SRalf Baechle 139141790e04SRalf Baechle if (new == 0 || new > (hw_tcs - tclimit)) 139241790e04SRalf Baechle goto out_einval; 139341790e04SRalf Baechle 139441790e04SRalf Baechle vpe->ntcs = new; 139541790e04SRalf Baechle 139641790e04SRalf Baechle return len; 139741790e04SRalf Baechle 139841790e04SRalf Baechle out_einval: 139952a7a27cSJoe Perches return -EINVAL; 140041790e04SRalf Baechle } 140141790e04SRalf Baechle 1402736fad17SKay Sievers static struct device_attribute vpe_class_attributes[] = { 14030f5d0df3SRalf Baechle __ATTR(kill, S_IWUSR, NULL, store_kill), 140441790e04SRalf Baechle __ATTR(ntcs, S_IRUGO | S_IWUSR, show_ntcs, store_ntcs), 140541790e04SRalf Baechle {} 140641790e04SRalf Baechle }; 140741790e04SRalf Baechle 1408736fad17SKay Sievers static void vpe_device_release(struct device *cd) 140941790e04SRalf Baechle { 141041790e04SRalf Baechle kfree(cd); 141141790e04SRalf Baechle } 141241790e04SRalf Baechle 141341790e04SRalf Baechle struct class vpe_class = { 141441790e04SRalf Baechle .name = "vpe", 141541790e04SRalf Baechle .owner = THIS_MODULE, 1416736fad17SKay Sievers .dev_release = vpe_device_release, 1417736fad17SKay Sievers .dev_attrs = vpe_class_attributes, 141841790e04SRalf Baechle }; 141941790e04SRalf Baechle 1420736fad17SKay Sievers struct device vpe_device; 142127a3bbafSRalf Baechle 1422e01402b1SRalf Baechle static int __init vpe_module_init(void) 1423e01402b1SRalf Baechle { 142407cc0c9eSRalf Baechle unsigned int mtflags, vpflags; 142507cc0c9eSRalf Baechle unsigned long flags, val; 1426e01402b1SRalf Baechle struct vpe *v = NULL; 1427e01402b1SRalf Baechle struct tc *t; 142841790e04SRalf Baechle int tc, err; 1429e01402b1SRalf Baechle 1430e01402b1SRalf Baechle if (!cpu_has_mipsmt) { 1431e01402b1SRalf Baechle printk("VPE loader: not a MIPS MT capable processor\n"); 1432e01402b1SRalf Baechle return -ENODEV; 1433e01402b1SRalf Baechle } 1434e01402b1SRalf Baechle 143507cc0c9eSRalf Baechle if (vpelimit == 0) { 143607cc0c9eSRalf Baechle printk(KERN_WARNING "No VPEs reserved for AP/SP, not " 143707cc0c9eSRalf Baechle "initializing VPE loader.\nPass maxvpes=<n> argument as " 143807cc0c9eSRalf Baechle "kernel argument\n"); 143907cc0c9eSRalf Baechle 144007cc0c9eSRalf Baechle return -ENODEV; 144107cc0c9eSRalf Baechle } 144207cc0c9eSRalf Baechle 144307cc0c9eSRalf Baechle if (tclimit == 0) { 144407cc0c9eSRalf Baechle printk(KERN_WARNING "No TCs reserved for AP/SP, not " 144507cc0c9eSRalf Baechle "initializing VPE loader.\nPass maxtcs=<n> argument as " 144607cc0c9eSRalf Baechle "kernel argument\n"); 144707cc0c9eSRalf Baechle 144807cc0c9eSRalf Baechle return -ENODEV; 144907cc0c9eSRalf Baechle } 145007cc0c9eSRalf Baechle 1451682e852eSAlexey Dobriyan major = register_chrdev(0, module_name, &vpe_fops); 1452682e852eSAlexey Dobriyan if (major < 0) { 1453e01402b1SRalf Baechle printk("VPE loader: unable to register character device\n"); 1454307bd284SRalf Baechle return major; 1455e01402b1SRalf Baechle } 1456e01402b1SRalf Baechle 145741790e04SRalf Baechle err = class_register(&vpe_class); 145841790e04SRalf Baechle if (err) { 145941790e04SRalf Baechle printk(KERN_ERR "vpe_class registration failed\n"); 146027a3bbafSRalf Baechle goto out_chrdev; 146127a3bbafSRalf Baechle } 146241790e04SRalf Baechle 1463736fad17SKay Sievers device_initialize(&vpe_device); 146441790e04SRalf Baechle vpe_device.class = &vpe_class, 146541790e04SRalf Baechle vpe_device.parent = NULL, 14661bb5beb4SKay Sievers dev_set_name(&vpe_device, "vpe1"); 146741790e04SRalf Baechle vpe_device.devt = MKDEV(major, minor); 1468736fad17SKay Sievers err = device_add(&vpe_device); 146941790e04SRalf Baechle if (err) { 147041790e04SRalf Baechle printk(KERN_ERR "Adding vpe_device failed\n"); 147141790e04SRalf Baechle goto out_class; 147241790e04SRalf Baechle } 147327a3bbafSRalf Baechle 147407cc0c9eSRalf Baechle local_irq_save(flags); 147507cc0c9eSRalf Baechle mtflags = dmt(); 147607cc0c9eSRalf Baechle vpflags = dvpe(); 1477e01402b1SRalf Baechle 1478e01402b1SRalf Baechle /* Put MVPE's into 'configuration state' */ 1479340ee4b9SRalf Baechle set_c0_mvpcontrol(MVPCONTROL_VPC); 1480e01402b1SRalf Baechle 1481e01402b1SRalf Baechle /* dump_mtregs(); */ 1482e01402b1SRalf Baechle 1483e01402b1SRalf Baechle val = read_c0_mvpconf0(); 148407cc0c9eSRalf Baechle hw_tcs = (val & MVPCONF0_PTC) + 1; 148507cc0c9eSRalf Baechle hw_vpes = ((val & MVPCONF0_PVPE) >> MVPCONF0_PVPE_SHIFT) + 1; 148607cc0c9eSRalf Baechle 148707cc0c9eSRalf Baechle for (tc = tclimit; tc < hw_tcs; tc++) { 148807cc0c9eSRalf Baechle /* 148907cc0c9eSRalf Baechle * Must re-enable multithreading temporarily or in case we 149007cc0c9eSRalf Baechle * reschedule send IPIs or similar we might hang. 149107cc0c9eSRalf Baechle */ 149207cc0c9eSRalf Baechle clear_c0_mvpcontrol(MVPCONTROL_VPC); 149307cc0c9eSRalf Baechle evpe(vpflags); 149407cc0c9eSRalf Baechle emt(mtflags); 149507cc0c9eSRalf Baechle local_irq_restore(flags); 149607cc0c9eSRalf Baechle t = alloc_tc(tc); 149707cc0c9eSRalf Baechle if (!t) { 149807cc0c9eSRalf Baechle err = -ENOMEM; 149907cc0c9eSRalf Baechle goto out; 150007cc0c9eSRalf Baechle } 150107cc0c9eSRalf Baechle 150207cc0c9eSRalf Baechle local_irq_save(flags); 150307cc0c9eSRalf Baechle mtflags = dmt(); 150407cc0c9eSRalf Baechle vpflags = dvpe(); 150507cc0c9eSRalf Baechle set_c0_mvpcontrol(MVPCONTROL_VPC); 1506e01402b1SRalf Baechle 1507e01402b1SRalf Baechle /* VPE's */ 150807cc0c9eSRalf Baechle if (tc < hw_tcs) { 150907cc0c9eSRalf Baechle settc(tc); 1510e01402b1SRalf Baechle 151107cc0c9eSRalf Baechle if ((v = alloc_vpe(tc)) == NULL) { 1512e01402b1SRalf Baechle printk(KERN_WARNING "VPE: unable to allocate VPE\n"); 151307cc0c9eSRalf Baechle 151407cc0c9eSRalf Baechle goto out_reenable; 1515e01402b1SRalf Baechle } 1516e01402b1SRalf Baechle 151741790e04SRalf Baechle v->ntcs = hw_tcs - tclimit; 151841790e04SRalf Baechle 15192600990eSRalf Baechle /* add the tc to the list of this vpe's tc's. */ 15202600990eSRalf Baechle list_add(&t->tc, &v->tc); 1521e01402b1SRalf Baechle 1522e01402b1SRalf Baechle /* deactivate all but vpe0 */ 152307cc0c9eSRalf Baechle if (tc >= tclimit) { 1524e01402b1SRalf Baechle unsigned long tmp = read_vpe_c0_vpeconf0(); 1525e01402b1SRalf Baechle 1526e01402b1SRalf Baechle tmp &= ~VPECONF0_VPA; 1527e01402b1SRalf Baechle 1528e01402b1SRalf Baechle /* master VPE */ 1529e01402b1SRalf Baechle tmp |= VPECONF0_MVP; 1530e01402b1SRalf Baechle write_vpe_c0_vpeconf0(tmp); 1531e01402b1SRalf Baechle } 1532e01402b1SRalf Baechle 1533e01402b1SRalf Baechle /* disable multi-threading with TC's */ 1534e01402b1SRalf Baechle write_vpe_c0_vpecontrol(read_vpe_c0_vpecontrol() & ~VPECONTROL_TE); 1535e01402b1SRalf Baechle 153607cc0c9eSRalf Baechle if (tc >= vpelimit) { 15372600990eSRalf Baechle /* 15382600990eSRalf Baechle * Set config to be the same as vpe0, 15392600990eSRalf Baechle * particularly kseg0 coherency alg 15402600990eSRalf Baechle */ 1541e01402b1SRalf Baechle write_vpe_c0_config(read_c0_config()); 1542e01402b1SRalf Baechle } 1543e01402b1SRalf Baechle } 1544e01402b1SRalf Baechle 1545e01402b1SRalf Baechle /* TC's */ 1546e01402b1SRalf Baechle t->pvpe = v; /* set the parent vpe */ 1547e01402b1SRalf Baechle 154807cc0c9eSRalf Baechle if (tc >= tclimit) { 1549e01402b1SRalf Baechle unsigned long tmp; 1550e01402b1SRalf Baechle 155107cc0c9eSRalf Baechle settc(tc); 1552e01402b1SRalf Baechle 15532600990eSRalf Baechle /* Any TC that is bound to VPE0 gets left as is - in case 15542600990eSRalf Baechle we are running SMTC on VPE0. A TC that is bound to any 15552600990eSRalf Baechle other VPE gets bound to VPE0, ideally I'd like to make 15562600990eSRalf Baechle it homeless but it doesn't appear to let me bind a TC 15572600990eSRalf Baechle to a non-existent VPE. Which is perfectly reasonable. 15582600990eSRalf Baechle 15592600990eSRalf Baechle The (un)bound state is visible to an EJTAG probe so may 15602600990eSRalf Baechle notify GDB... 15612600990eSRalf Baechle */ 15622600990eSRalf Baechle 15632600990eSRalf Baechle if (((tmp = read_tc_c0_tcbind()) & TCBIND_CURVPE)) { 15642600990eSRalf Baechle /* tc is bound >vpe0 */ 15652600990eSRalf Baechle write_tc_c0_tcbind(tmp & ~TCBIND_CURVPE); 15662600990eSRalf Baechle 15672600990eSRalf Baechle t->pvpe = get_vpe(0); /* set the parent vpe */ 15682600990eSRalf Baechle } 1569e01402b1SRalf Baechle 15707c3a622dSNigel Stephens /* halt the TC */ 15717c3a622dSNigel Stephens write_tc_c0_tchalt(TCHALT_H); 15727c3a622dSNigel Stephens mips_ihb(); 15737c3a622dSNigel Stephens 1574e01402b1SRalf Baechle tmp = read_tc_c0_tcstatus(); 1575e01402b1SRalf Baechle 15762600990eSRalf Baechle /* mark not activated and not dynamically allocatable */ 1577e01402b1SRalf Baechle tmp &= ~(TCSTATUS_A | TCSTATUS_DA); 1578e01402b1SRalf Baechle tmp |= TCSTATUS_IXMT; /* interrupt exempt */ 1579e01402b1SRalf Baechle write_tc_c0_tcstatus(tmp); 1580e01402b1SRalf Baechle } 1581e01402b1SRalf Baechle } 1582e01402b1SRalf Baechle 158307cc0c9eSRalf Baechle out_reenable: 1584e01402b1SRalf Baechle /* release config state */ 1585340ee4b9SRalf Baechle clear_c0_mvpcontrol(MVPCONTROL_VPC); 1586e01402b1SRalf Baechle 158707cc0c9eSRalf Baechle evpe(vpflags); 158807cc0c9eSRalf Baechle emt(mtflags); 158907cc0c9eSRalf Baechle local_irq_restore(flags); 159007cc0c9eSRalf Baechle 15912600990eSRalf Baechle #ifdef CONFIG_MIPS_APSP_KSPD 15922600990eSRalf Baechle kspd_events.kspd_sp_exit = kspd_sp_exit; 15932600990eSRalf Baechle #endif 1594e01402b1SRalf Baechle return 0; 159527a3bbafSRalf Baechle 159641790e04SRalf Baechle out_class: 159741790e04SRalf Baechle class_unregister(&vpe_class); 159827a3bbafSRalf Baechle out_chrdev: 159927a3bbafSRalf Baechle unregister_chrdev(major, module_name); 160027a3bbafSRalf Baechle 160107cc0c9eSRalf Baechle out: 160227a3bbafSRalf Baechle return err; 1603e01402b1SRalf Baechle } 1604e01402b1SRalf Baechle 1605e01402b1SRalf Baechle static void __exit vpe_module_exit(void) 1606e01402b1SRalf Baechle { 1607e01402b1SRalf Baechle struct vpe *v, *n; 1608e01402b1SRalf Baechle 1609e01402b1SRalf Baechle list_for_each_entry_safe(v, n, &vpecontrol.vpe_list, list) { 1610e01402b1SRalf Baechle if (v->state != VPE_STATE_UNUSED) { 1611e01402b1SRalf Baechle release_vpe(v); 1612e01402b1SRalf Baechle } 1613e01402b1SRalf Baechle } 1614e01402b1SRalf Baechle 1615736fad17SKay Sievers device_del(&vpe_device); 1616e01402b1SRalf Baechle unregister_chrdev(major, module_name); 1617e01402b1SRalf Baechle } 1618e01402b1SRalf Baechle 1619e01402b1SRalf Baechle module_init(vpe_module_init); 1620e01402b1SRalf Baechle module_exit(vpe_module_exit); 1621e01402b1SRalf Baechle MODULE_DESCRIPTION("MIPS VPE Loader"); 16222600990eSRalf Baechle MODULE_AUTHOR("Elizabeth Oldham, MIPS Technologies, Inc."); 1623e01402b1SRalf Baechle MODULE_LICENSE("GPL"); 1624