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> 41e01402b1SRalf Baechle #include <linux/syscalls.h> 42e01402b1SRalf Baechle #include <linux/moduleloader.h> 43e01402b1SRalf Baechle #include <linux/interrupt.h> 44e01402b1SRalf Baechle #include <linux/poll.h> 45e01402b1SRalf Baechle #include <linux/bootmem.h> 46e01402b1SRalf Baechle #include <asm/mipsregs.h> 47340ee4b9SRalf Baechle #include <asm/mipsmtregs.h> 48e01402b1SRalf Baechle #include <asm/cacheflush.h> 49e01402b1SRalf Baechle #include <asm/atomic.h> 50e01402b1SRalf Baechle #include <asm/cpu.h> 5127a3bbafSRalf Baechle #include <asm/mips_mt.h> 52e01402b1SRalf Baechle #include <asm/processor.h> 53e01402b1SRalf Baechle #include <asm/system.h> 542600990eSRalf Baechle #include <asm/vpe.h> 552600990eSRalf Baechle #include <asm/kspd.h> 56e01402b1SRalf Baechle 57e01402b1SRalf Baechle typedef void *vpe_handle; 58e01402b1SRalf Baechle 59e01402b1SRalf Baechle #ifndef ARCH_SHF_SMALL 60e01402b1SRalf Baechle #define ARCH_SHF_SMALL 0 61e01402b1SRalf Baechle #endif 62e01402b1SRalf Baechle 63e01402b1SRalf Baechle /* If this is set, the section belongs in the init part of the module */ 64e01402b1SRalf Baechle #define INIT_OFFSET_MASK (1UL << (BITS_PER_LONG-1)) 65e01402b1SRalf Baechle 6641790e04SRalf Baechle /* 6741790e04SRalf Baechle * The number of TCs and VPEs physically available on the core 6841790e04SRalf Baechle */ 6941790e04SRalf Baechle static int hw_tcs, hw_vpes; 70e01402b1SRalf Baechle static char module_name[] = "vpe"; 71307bd284SRalf Baechle static int major; 7227a3bbafSRalf Baechle static const int minor = 1; /* fixed for now */ 73e01402b1SRalf Baechle 742600990eSRalf Baechle #ifdef CONFIG_MIPS_APSP_KSPD 752600990eSRalf Baechle static struct kspd_notifications kspd_events; 762600990eSRalf Baechle static int kspd_events_reqd = 0; 772600990eSRalf Baechle #endif 782600990eSRalf Baechle 79e01402b1SRalf Baechle /* grab the likely amount of memory we will need. */ 80e01402b1SRalf Baechle #ifdef CONFIG_MIPS_VPE_LOADER_TOM 81e01402b1SRalf Baechle #define P_SIZE (2 * 1024 * 1024) 82e01402b1SRalf Baechle #else 83e01402b1SRalf Baechle /* add an overhead to the max kmalloc size for non-striped symbols/etc */ 84e01402b1SRalf Baechle #define P_SIZE (256 * 1024) 85e01402b1SRalf Baechle #endif 86e01402b1SRalf Baechle 872600990eSRalf Baechle extern unsigned long physical_memsize; 882600990eSRalf Baechle 89e01402b1SRalf Baechle #define MAX_VPES 16 902600990eSRalf Baechle #define VPE_PATH_MAX 256 91e01402b1SRalf Baechle 92e01402b1SRalf Baechle enum vpe_state { 93e01402b1SRalf Baechle VPE_STATE_UNUSED = 0, 94e01402b1SRalf Baechle VPE_STATE_INUSE, 95e01402b1SRalf Baechle VPE_STATE_RUNNING 96e01402b1SRalf Baechle }; 97e01402b1SRalf Baechle 98e01402b1SRalf Baechle enum tc_state { 99e01402b1SRalf Baechle TC_STATE_UNUSED = 0, 100e01402b1SRalf Baechle TC_STATE_INUSE, 101e01402b1SRalf Baechle TC_STATE_RUNNING, 102e01402b1SRalf Baechle TC_STATE_DYNAMIC 103e01402b1SRalf Baechle }; 104e01402b1SRalf Baechle 105307bd284SRalf Baechle struct vpe { 106e01402b1SRalf Baechle enum vpe_state state; 107e01402b1SRalf Baechle 108e01402b1SRalf Baechle /* (device) minor associated with this vpe */ 109e01402b1SRalf Baechle int minor; 110e01402b1SRalf Baechle 111e01402b1SRalf Baechle /* elfloader stuff */ 112e01402b1SRalf Baechle void *load_addr; 113571e0bedSRalf Baechle unsigned long len; 114e01402b1SRalf Baechle char *pbuffer; 115571e0bedSRalf Baechle unsigned long plen; 1162600990eSRalf Baechle unsigned int uid, gid; 1172600990eSRalf Baechle char cwd[VPE_PATH_MAX]; 118e01402b1SRalf Baechle 119e01402b1SRalf Baechle unsigned long __start; 120e01402b1SRalf Baechle 121e01402b1SRalf Baechle /* tc's associated with this vpe */ 122e01402b1SRalf Baechle struct list_head tc; 123e01402b1SRalf Baechle 124e01402b1SRalf Baechle /* The list of vpe's */ 125e01402b1SRalf Baechle struct list_head list; 126e01402b1SRalf Baechle 127e01402b1SRalf Baechle /* shared symbol address */ 128e01402b1SRalf Baechle void *shared_ptr; 1292600990eSRalf Baechle 1302600990eSRalf Baechle /* the list of who wants to know when something major happens */ 1312600990eSRalf Baechle struct list_head notify; 13241790e04SRalf Baechle 13341790e04SRalf Baechle unsigned int ntcs; 134307bd284SRalf Baechle }; 135307bd284SRalf Baechle 136307bd284SRalf Baechle struct tc { 137307bd284SRalf Baechle enum tc_state state; 138307bd284SRalf Baechle int index; 139307bd284SRalf Baechle 14007cc0c9eSRalf Baechle struct vpe *pvpe; /* parent VPE */ 14107cc0c9eSRalf Baechle struct list_head tc; /* The list of TC's with this VPE */ 14207cc0c9eSRalf Baechle struct list_head list; /* The global list of tc's */ 143307bd284SRalf Baechle }; 144e01402b1SRalf Baechle 1459cfdf6f1SRalf Baechle struct { 146e01402b1SRalf Baechle /* Virtual processing elements */ 147e01402b1SRalf Baechle struct list_head vpe_list; 148e01402b1SRalf Baechle 149e01402b1SRalf Baechle /* Thread contexts */ 150e01402b1SRalf Baechle struct list_head tc_list; 1519cfdf6f1SRalf Baechle } vpecontrol = { 1529cfdf6f1SRalf Baechle .vpe_list = LIST_HEAD_INIT(vpecontrol.vpe_list), 1539cfdf6f1SRalf Baechle .tc_list = LIST_HEAD_INIT(vpecontrol.tc_list) 1549cfdf6f1SRalf Baechle }; 155e01402b1SRalf Baechle 156e01402b1SRalf Baechle static void release_progmem(void *ptr); 157e01402b1SRalf Baechle extern void save_gp_address(unsigned int secbase, unsigned int rel); 158e01402b1SRalf Baechle 159e01402b1SRalf Baechle /* get the vpe associated with this minor */ 160e01402b1SRalf Baechle 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 */ 176e01402b1SRalf Baechle 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) */ 201e01402b1SRalf Baechle 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. */ 218e01402b1SRalf Baechle 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 */ 234e01402b1SRalf Baechle 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 242e01402b1SRalf Baechle 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; 329e01402b1SRalf Baechle s->sh_entsize = get_offset(&mod->core_size, s); 330e01402b1SRalf Baechle } 331e01402b1SRalf Baechle 332e01402b1SRalf Baechle if (m == 0) 333e01402b1SRalf Baechle mod->core_text_size = mod->core_size; 334e01402b1SRalf Baechle 335e01402b1SRalf Baechle } 336e01402b1SRalf Baechle } 337e01402b1SRalf Baechle 338e01402b1SRalf Baechle 339e01402b1SRalf Baechle /* from module-elf32.c, but subverted a little */ 340e01402b1SRalf Baechle 341e01402b1SRalf Baechle struct mips_hi16 { 342e01402b1SRalf Baechle struct mips_hi16 *next; 343e01402b1SRalf Baechle Elf32_Addr *addr; 344e01402b1SRalf Baechle Elf32_Addr value; 345e01402b1SRalf Baechle }; 346e01402b1SRalf Baechle 347e01402b1SRalf Baechle static struct mips_hi16 *mips_hi16_list; 348e01402b1SRalf Baechle static unsigned int gp_offs, gp_addr; 349e01402b1SRalf Baechle 350e01402b1SRalf Baechle static int apply_r_mips_none(struct module *me, uint32_t *location, 351e01402b1SRalf Baechle Elf32_Addr v) 352e01402b1SRalf Baechle { 353e01402b1SRalf Baechle return 0; 354e01402b1SRalf Baechle } 355e01402b1SRalf Baechle 356e01402b1SRalf Baechle static int apply_r_mips_gprel16(struct module *me, uint32_t *location, 357e01402b1SRalf Baechle Elf32_Addr v) 358e01402b1SRalf Baechle { 359e01402b1SRalf Baechle int rel; 360e01402b1SRalf Baechle 361e01402b1SRalf Baechle if( !(*location & 0xffff) ) { 362e01402b1SRalf Baechle rel = (int)v - gp_addr; 363e01402b1SRalf Baechle } 364e01402b1SRalf Baechle else { 365e01402b1SRalf Baechle /* .sbss + gp(relative) + offset */ 366e01402b1SRalf Baechle /* kludge! */ 367e01402b1SRalf Baechle rel = (int)(short)((int)v + gp_offs + 368e01402b1SRalf Baechle (int)(short)(*location & 0xffff) - gp_addr); 369e01402b1SRalf Baechle } 370e01402b1SRalf Baechle 371e01402b1SRalf Baechle if( (rel > 32768) || (rel < -32768) ) { 3722600990eSRalf Baechle printk(KERN_DEBUG "VPE loader: apply_r_mips_gprel16: " 3732600990eSRalf Baechle "relative address 0x%x out of range of gp register\n", 3742600990eSRalf Baechle rel); 375e01402b1SRalf Baechle return -ENOEXEC; 376e01402b1SRalf Baechle } 377e01402b1SRalf Baechle 378e01402b1SRalf Baechle *location = (*location & 0xffff0000) | (rel & 0xffff); 379e01402b1SRalf Baechle 380e01402b1SRalf Baechle return 0; 381e01402b1SRalf Baechle } 382e01402b1SRalf Baechle 383e01402b1SRalf Baechle static int apply_r_mips_pc16(struct module *me, uint32_t *location, 384e01402b1SRalf Baechle Elf32_Addr v) 385e01402b1SRalf Baechle { 386e01402b1SRalf Baechle int rel; 387e01402b1SRalf Baechle rel = (((unsigned int)v - (unsigned int)location)); 388e01402b1SRalf Baechle rel >>= 2; // because the offset is in _instructions_ not bytes. 389e01402b1SRalf Baechle rel -= 1; // and one instruction less due to the branch delay slot. 390e01402b1SRalf Baechle 391e01402b1SRalf Baechle if( (rel > 32768) || (rel < -32768) ) { 3922600990eSRalf Baechle printk(KERN_DEBUG "VPE loader: " 393e01402b1SRalf Baechle "apply_r_mips_pc16: relative address out of range 0x%x\n", rel); 394e01402b1SRalf Baechle return -ENOEXEC; 395e01402b1SRalf Baechle } 396e01402b1SRalf Baechle 397e01402b1SRalf Baechle *location = (*location & 0xffff0000) | (rel & 0xffff); 398e01402b1SRalf Baechle 399e01402b1SRalf Baechle return 0; 400e01402b1SRalf Baechle } 401e01402b1SRalf Baechle 402e01402b1SRalf Baechle static int apply_r_mips_32(struct module *me, uint32_t *location, 403e01402b1SRalf Baechle Elf32_Addr v) 404e01402b1SRalf Baechle { 405e01402b1SRalf Baechle *location += v; 406e01402b1SRalf Baechle 407e01402b1SRalf Baechle return 0; 408e01402b1SRalf Baechle } 409e01402b1SRalf Baechle 410e01402b1SRalf Baechle static int apply_r_mips_26(struct module *me, uint32_t *location, 411e01402b1SRalf Baechle Elf32_Addr v) 412e01402b1SRalf Baechle { 413e01402b1SRalf Baechle if (v % 4) { 4142600990eSRalf Baechle printk(KERN_DEBUG "VPE loader: apply_r_mips_26 " 4152600990eSRalf Baechle " unaligned relocation\n"); 416e01402b1SRalf Baechle return -ENOEXEC; 417e01402b1SRalf Baechle } 418e01402b1SRalf Baechle 419307bd284SRalf Baechle /* 420307bd284SRalf Baechle * Not desperately convinced this is a good check of an overflow condition 421307bd284SRalf Baechle * anyway. But it gets in the way of handling undefined weak symbols which 422307bd284SRalf Baechle * we want to set to zero. 423307bd284SRalf Baechle * if ((v & 0xf0000000) != (((unsigned long)location + 4) & 0xf0000000)) { 424307bd284SRalf Baechle * printk(KERN_ERR 425307bd284SRalf Baechle * "module %s: relocation overflow\n", 426307bd284SRalf Baechle * me->name); 427307bd284SRalf Baechle * return -ENOEXEC; 428307bd284SRalf Baechle * } 429e01402b1SRalf Baechle */ 430e01402b1SRalf Baechle 431e01402b1SRalf Baechle *location = (*location & ~0x03ffffff) | 432e01402b1SRalf Baechle ((*location + (v >> 2)) & 0x03ffffff); 433e01402b1SRalf Baechle return 0; 434e01402b1SRalf Baechle } 435e01402b1SRalf Baechle 436e01402b1SRalf Baechle static int apply_r_mips_hi16(struct module *me, uint32_t *location, 437e01402b1SRalf Baechle Elf32_Addr v) 438e01402b1SRalf Baechle { 439e01402b1SRalf Baechle struct mips_hi16 *n; 440e01402b1SRalf Baechle 441e01402b1SRalf Baechle /* 442e01402b1SRalf Baechle * We cannot relocate this one now because we don't know the value of 443e01402b1SRalf Baechle * the carry we need to add. Save the information, and let LO16 do the 444e01402b1SRalf Baechle * actual relocation. 445e01402b1SRalf Baechle */ 446e01402b1SRalf Baechle n = kmalloc(sizeof *n, GFP_KERNEL); 447e01402b1SRalf Baechle if (!n) 448e01402b1SRalf Baechle return -ENOMEM; 449e01402b1SRalf Baechle 450e01402b1SRalf Baechle n->addr = location; 451e01402b1SRalf Baechle n->value = v; 452e01402b1SRalf Baechle n->next = mips_hi16_list; 453e01402b1SRalf Baechle mips_hi16_list = n; 454e01402b1SRalf Baechle 455e01402b1SRalf Baechle return 0; 456e01402b1SRalf Baechle } 457e01402b1SRalf Baechle 458e01402b1SRalf Baechle static int apply_r_mips_lo16(struct module *me, uint32_t *location, 459e01402b1SRalf Baechle Elf32_Addr v) 460e01402b1SRalf Baechle { 461e01402b1SRalf Baechle unsigned long insnlo = *location; 462e01402b1SRalf Baechle Elf32_Addr val, vallo; 463e01402b1SRalf Baechle 464e01402b1SRalf Baechle /* Sign extend the addend we extract from the lo insn. */ 465e01402b1SRalf Baechle vallo = ((insnlo & 0xffff) ^ 0x8000) - 0x8000; 466e01402b1SRalf Baechle 467e01402b1SRalf Baechle if (mips_hi16_list != NULL) { 468e01402b1SRalf Baechle struct mips_hi16 *l; 469e01402b1SRalf Baechle 470e01402b1SRalf Baechle l = mips_hi16_list; 471e01402b1SRalf Baechle while (l != NULL) { 472e01402b1SRalf Baechle struct mips_hi16 *next; 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"); 4822600990eSRalf Baechle return -ENOEXEC; 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; 520e01402b1SRalf Baechle } 521e01402b1SRalf Baechle 522e01402b1SRalf Baechle static int (*reloc_handlers[]) (struct module *me, uint32_t *location, 523e01402b1SRalf Baechle Elf32_Addr v) = { 524e01402b1SRalf Baechle [R_MIPS_NONE] = apply_r_mips_none, 525e01402b1SRalf Baechle [R_MIPS_32] = apply_r_mips_32, 526e01402b1SRalf Baechle [R_MIPS_26] = apply_r_mips_26, 527e01402b1SRalf Baechle [R_MIPS_HI16] = apply_r_mips_hi16, 528e01402b1SRalf Baechle [R_MIPS_LO16] = apply_r_mips_lo16, 529e01402b1SRalf Baechle [R_MIPS_GPREL16] = apply_r_mips_gprel16, 530e01402b1SRalf Baechle [R_MIPS_PC16] = apply_r_mips_pc16 531e01402b1SRalf Baechle }; 532e01402b1SRalf Baechle 5332600990eSRalf Baechle static char *rstrs[] = { 5342600990eSRalf Baechle [R_MIPS_NONE] = "MIPS_NONE", 5352600990eSRalf Baechle [R_MIPS_32] = "MIPS_32", 5362600990eSRalf Baechle [R_MIPS_26] = "MIPS_26", 5372600990eSRalf Baechle [R_MIPS_HI16] = "MIPS_HI16", 5382600990eSRalf Baechle [R_MIPS_LO16] = "MIPS_LO16", 5392600990eSRalf Baechle [R_MIPS_GPREL16] = "MIPS_GPREL16", 5402600990eSRalf Baechle [R_MIPS_PC16] = "MIPS_PC16" 5412600990eSRalf Baechle }; 542e01402b1SRalf Baechle 543e01402b1SRalf Baechle int apply_relocations(Elf32_Shdr *sechdrs, 544e01402b1SRalf Baechle const char *strtab, 545e01402b1SRalf Baechle unsigned int symindex, 546e01402b1SRalf Baechle unsigned int relsec, 547e01402b1SRalf Baechle struct module *me) 548e01402b1SRalf Baechle { 549e01402b1SRalf Baechle Elf32_Rel *rel = (void *) sechdrs[relsec].sh_addr; 550e01402b1SRalf Baechle Elf32_Sym *sym; 551e01402b1SRalf Baechle uint32_t *location; 552e01402b1SRalf Baechle unsigned int i; 553e01402b1SRalf Baechle Elf32_Addr v; 554e01402b1SRalf Baechle int res; 555e01402b1SRalf Baechle 556e01402b1SRalf Baechle for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) { 557e01402b1SRalf Baechle Elf32_Word r_info = rel[i].r_info; 558e01402b1SRalf Baechle 559e01402b1SRalf Baechle /* This is where to make the change */ 560e01402b1SRalf Baechle location = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr 561e01402b1SRalf Baechle + rel[i].r_offset; 562e01402b1SRalf Baechle /* This is the symbol it is referring to */ 563e01402b1SRalf Baechle sym = (Elf32_Sym *)sechdrs[symindex].sh_addr 564e01402b1SRalf Baechle + ELF32_R_SYM(r_info); 565e01402b1SRalf Baechle 566e01402b1SRalf Baechle if (!sym->st_value) { 567e01402b1SRalf Baechle printk(KERN_DEBUG "%s: undefined weak symbol %s\n", 568e01402b1SRalf Baechle me->name, strtab + sym->st_name); 569e01402b1SRalf Baechle /* just print the warning, dont barf */ 570e01402b1SRalf Baechle } 571e01402b1SRalf Baechle 572e01402b1SRalf Baechle v = sym->st_value; 573e01402b1SRalf Baechle 574e01402b1SRalf Baechle res = reloc_handlers[ELF32_R_TYPE(r_info)](me, location, v); 575e01402b1SRalf Baechle if( res ) { 5762600990eSRalf Baechle char *r = rstrs[ELF32_R_TYPE(r_info)]; 5772600990eSRalf Baechle printk(KERN_WARNING "VPE loader: .text+0x%x " 5782600990eSRalf Baechle "relocation type %s for symbol \"%s\" failed\n", 5792600990eSRalf Baechle rel[i].r_offset, r ? r : "UNKNOWN", 5802600990eSRalf Baechle strtab + sym->st_name); 581e01402b1SRalf Baechle return res; 582e01402b1SRalf Baechle } 5832600990eSRalf Baechle } 584e01402b1SRalf Baechle 585e01402b1SRalf Baechle return 0; 586e01402b1SRalf Baechle } 587e01402b1SRalf Baechle 588e01402b1SRalf Baechle void save_gp_address(unsigned int secbase, unsigned int rel) 589e01402b1SRalf Baechle { 590e01402b1SRalf Baechle gp_addr = secbase + rel; 591e01402b1SRalf Baechle gp_offs = gp_addr - (secbase & 0xffff0000); 592e01402b1SRalf Baechle } 593e01402b1SRalf Baechle /* end module-elf32.c */ 594e01402b1SRalf Baechle 595e01402b1SRalf Baechle 596e01402b1SRalf Baechle 597e01402b1SRalf Baechle /* Change all symbols so that sh_value encodes the pointer directly. */ 5982600990eSRalf Baechle static void simplify_symbols(Elf_Shdr * sechdrs, 599e01402b1SRalf Baechle unsigned int symindex, 600e01402b1SRalf Baechle const char *strtab, 601e01402b1SRalf Baechle const char *secstrings, 602e01402b1SRalf Baechle unsigned int nsecs, struct module *mod) 603e01402b1SRalf Baechle { 604e01402b1SRalf Baechle Elf_Sym *sym = (void *)sechdrs[symindex].sh_addr; 605e01402b1SRalf Baechle unsigned long secbase, bssbase = 0; 606e01402b1SRalf Baechle unsigned int i, n = sechdrs[symindex].sh_size / sizeof(Elf_Sym); 6072600990eSRalf Baechle int size; 608e01402b1SRalf Baechle 609e01402b1SRalf Baechle /* find the .bss section for COMMON symbols */ 610e01402b1SRalf Baechle for (i = 0; i < nsecs; i++) { 6112600990eSRalf Baechle if (strncmp(secstrings + sechdrs[i].sh_name, ".bss", 4) == 0) { 612e01402b1SRalf Baechle bssbase = sechdrs[i].sh_addr; 6132600990eSRalf Baechle break; 6142600990eSRalf Baechle } 615e01402b1SRalf Baechle } 616e01402b1SRalf Baechle 617e01402b1SRalf Baechle for (i = 1; i < n; i++) { 618e01402b1SRalf Baechle switch (sym[i].st_shndx) { 619e01402b1SRalf Baechle case SHN_COMMON: 6202600990eSRalf Baechle /* Allocate space for the symbol in the .bss section. 6212600990eSRalf Baechle st_value is currently size. 622e01402b1SRalf Baechle We want it to have the address of the symbol. */ 623e01402b1SRalf Baechle 624e01402b1SRalf Baechle size = sym[i].st_value; 625e01402b1SRalf Baechle sym[i].st_value = bssbase; 626e01402b1SRalf Baechle 627e01402b1SRalf Baechle bssbase += size; 628e01402b1SRalf Baechle break; 629e01402b1SRalf Baechle 630e01402b1SRalf Baechle case SHN_ABS: 631e01402b1SRalf Baechle /* Don't need to do anything */ 632e01402b1SRalf Baechle break; 633e01402b1SRalf Baechle 634e01402b1SRalf Baechle case SHN_UNDEF: 635e01402b1SRalf Baechle /* ret = -ENOENT; */ 636e01402b1SRalf Baechle break; 637e01402b1SRalf Baechle 638e01402b1SRalf Baechle case SHN_MIPS_SCOMMON: 6392600990eSRalf Baechle printk(KERN_DEBUG "simplify_symbols: ignoring SHN_MIPS_SCOMMON " 6402600990eSRalf Baechle "symbol <%s> st_shndx %d\n", strtab + sym[i].st_name, 6412600990eSRalf Baechle sym[i].st_shndx); 642e01402b1SRalf Baechle // .sbss section 643e01402b1SRalf Baechle break; 644e01402b1SRalf Baechle 645e01402b1SRalf Baechle default: 646e01402b1SRalf Baechle secbase = sechdrs[sym[i].st_shndx].sh_addr; 647e01402b1SRalf Baechle 648e01402b1SRalf Baechle if (strncmp(strtab + sym[i].st_name, "_gp", 3) == 0) { 649e01402b1SRalf Baechle save_gp_address(secbase, sym[i].st_value); 650e01402b1SRalf Baechle } 651e01402b1SRalf Baechle 652e01402b1SRalf Baechle sym[i].st_value += secbase; 653e01402b1SRalf Baechle break; 654e01402b1SRalf Baechle } 655e01402b1SRalf Baechle } 656e01402b1SRalf Baechle } 657e01402b1SRalf Baechle 658e01402b1SRalf Baechle #ifdef DEBUG_ELFLOADER 659e01402b1SRalf Baechle static void dump_elfsymbols(Elf_Shdr * sechdrs, unsigned int symindex, 660e01402b1SRalf Baechle const char *strtab, struct module *mod) 661e01402b1SRalf Baechle { 662e01402b1SRalf Baechle Elf_Sym *sym = (void *)sechdrs[symindex].sh_addr; 663e01402b1SRalf Baechle unsigned int i, n = sechdrs[symindex].sh_size / sizeof(Elf_Sym); 664e01402b1SRalf Baechle 665e01402b1SRalf Baechle printk(KERN_DEBUG "dump_elfsymbols: n %d\n", n); 666e01402b1SRalf Baechle for (i = 1; i < n; i++) { 667e01402b1SRalf Baechle printk(KERN_DEBUG " i %d name <%s> 0x%x\n", i, 668e01402b1SRalf Baechle strtab + sym[i].st_name, sym[i].st_value); 669e01402b1SRalf Baechle } 670e01402b1SRalf Baechle } 671e01402b1SRalf Baechle #endif 672e01402b1SRalf Baechle 673e01402b1SRalf Baechle /* We are prepared so configure and start the VPE... */ 674be6e1437SRalf Baechle static int vpe_run(struct vpe * v) 675e01402b1SRalf Baechle { 67607cc0c9eSRalf Baechle unsigned long flags, val, dmt_flag; 6772600990eSRalf Baechle struct vpe_notifications *n; 67807cc0c9eSRalf Baechle unsigned int vpeflags; 679e01402b1SRalf Baechle struct tc *t; 680e01402b1SRalf Baechle 681e01402b1SRalf Baechle /* check we are the Master VPE */ 68207cc0c9eSRalf Baechle local_irq_save(flags); 683e01402b1SRalf Baechle val = read_c0_vpeconf0(); 684e01402b1SRalf Baechle if (!(val & VPECONF0_MVP)) { 685e01402b1SRalf Baechle printk(KERN_WARNING 6862600990eSRalf Baechle "VPE loader: only Master VPE's are allowed to configure MT\n"); 68707cc0c9eSRalf Baechle local_irq_restore(flags); 68807cc0c9eSRalf Baechle 689e01402b1SRalf Baechle return -1; 690e01402b1SRalf Baechle } 691e01402b1SRalf Baechle 69207cc0c9eSRalf Baechle dmt_flag = dmt(); 69307cc0c9eSRalf Baechle vpeflags = dvpe(); 694e01402b1SRalf Baechle 695e01402b1SRalf Baechle if (!list_empty(&v->tc)) { 696e01402b1SRalf Baechle if ((t = list_entry(v->tc.next, struct tc, tc)) == NULL) { 69707cc0c9eSRalf Baechle evpe(vpeflags); 69807cc0c9eSRalf Baechle emt(dmt_flag); 69907cc0c9eSRalf Baechle local_irq_restore(flags); 70007cc0c9eSRalf Baechle 70107cc0c9eSRalf Baechle printk(KERN_WARNING 70207cc0c9eSRalf Baechle "VPE loader: TC %d is already in use.\n", 703e01402b1SRalf Baechle t->index); 704e01402b1SRalf Baechle return -ENOEXEC; 705e01402b1SRalf Baechle } 706e01402b1SRalf Baechle } else { 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: No TC's associated with VPE %d\n", 713e01402b1SRalf Baechle v->minor); 71407cc0c9eSRalf Baechle 715e01402b1SRalf Baechle return -ENOEXEC; 716e01402b1SRalf Baechle } 717e01402b1SRalf Baechle 7182600990eSRalf Baechle /* Put MVPE's into 'configuration state' */ 7192600990eSRalf Baechle set_c0_mvpcontrol(MVPCONTROL_VPC); 720e01402b1SRalf Baechle 7212600990eSRalf Baechle settc(t->index); 722e01402b1SRalf Baechle 723e01402b1SRalf Baechle /* should check it is halted, and not activated */ 724e01402b1SRalf Baechle if ((read_tc_c0_tcstatus() & TCSTATUS_A) || !(read_tc_c0_tchalt() & TCHALT_H)) { 72507cc0c9eSRalf Baechle evpe(vpeflags); 72607cc0c9eSRalf Baechle emt(dmt_flag); 72707cc0c9eSRalf Baechle local_irq_restore(flags); 72807cc0c9eSRalf Baechle 72907cc0c9eSRalf Baechle printk(KERN_WARNING "VPE loader: TC %d is already active!\n", 730e01402b1SRalf Baechle t->index); 73107cc0c9eSRalf Baechle 732e01402b1SRalf Baechle return -ENOEXEC; 733e01402b1SRalf Baechle } 734e01402b1SRalf Baechle 735e01402b1SRalf Baechle /* Write the address we want it to start running from in the TCPC register. */ 736e01402b1SRalf Baechle write_tc_c0_tcrestart((unsigned long)v->__start); 737e01402b1SRalf Baechle write_tc_c0_tccontext((unsigned long)0); 73807cc0c9eSRalf Baechle 7392600990eSRalf Baechle /* 7402600990eSRalf Baechle * Mark the TC as activated, not interrupt exempt and not dynamically 7412600990eSRalf Baechle * allocatable 7422600990eSRalf Baechle */ 743e01402b1SRalf Baechle val = read_tc_c0_tcstatus(); 744e01402b1SRalf Baechle val = (val & ~(TCSTATUS_DA | TCSTATUS_IXMT)) | TCSTATUS_A; 745e01402b1SRalf Baechle write_tc_c0_tcstatus(val); 746e01402b1SRalf Baechle 747e01402b1SRalf Baechle write_tc_c0_tchalt(read_tc_c0_tchalt() & ~TCHALT_H); 748e01402b1SRalf Baechle 749e01402b1SRalf Baechle /* 750e01402b1SRalf Baechle * The sde-kit passes 'memsize' to __start in $a3, so set something 7512600990eSRalf Baechle * here... Or set $a3 to zero and define DFLT_STACK_SIZE and 752e01402b1SRalf Baechle * DFLT_HEAP_SIZE when you compile your program 753e01402b1SRalf Baechle */ 75441790e04SRalf Baechle mttgpr(6, v->ntcs); 7552600990eSRalf Baechle mttgpr(7, physical_memsize); 756e01402b1SRalf Baechle 7572600990eSRalf Baechle /* set up VPE1 */ 7582600990eSRalf Baechle /* 7592600990eSRalf Baechle * bind the TC to VPE 1 as late as possible so we only have the final 7602600990eSRalf Baechle * VPE registers to set up, and so an EJTAG probe can trigger on it 7612600990eSRalf Baechle */ 76207cc0c9eSRalf Baechle write_tc_c0_tcbind((read_tc_c0_tcbind() & ~TCBIND_CURVPE) | 1); 7632600990eSRalf Baechle 764a94d7020SElizabeth Oldham write_vpe_c0_vpeconf0(read_vpe_c0_vpeconf0() & ~(VPECONF0_VPA)); 765a94d7020SElizabeth Oldham 766a94d7020SElizabeth Oldham back_to_back_c0_hazard(); 767a94d7020SElizabeth Oldham 7682600990eSRalf Baechle /* Set up the XTC bit in vpeconf0 to point at our tc */ 7692600990eSRalf Baechle write_vpe_c0_vpeconf0( (read_vpe_c0_vpeconf0() & ~(VPECONF0_XTC)) 7702600990eSRalf Baechle | (t->index << VPECONF0_XTC_SHIFT)); 7712600990eSRalf Baechle 772a94d7020SElizabeth Oldham back_to_back_c0_hazard(); 773a94d7020SElizabeth Oldham 7742600990eSRalf Baechle /* enable this VPE */ 7752600990eSRalf Baechle write_vpe_c0_vpeconf0(read_vpe_c0_vpeconf0() | VPECONF0_VPA); 776e01402b1SRalf Baechle 777e01402b1SRalf Baechle /* clear out any left overs from a previous program */ 7782600990eSRalf Baechle write_vpe_c0_status(0); 779e01402b1SRalf Baechle write_vpe_c0_cause(0); 780e01402b1SRalf Baechle 781e01402b1SRalf Baechle /* take system out of configuration state */ 782340ee4b9SRalf Baechle clear_c0_mvpcontrol(MVPCONTROL_VPC); 783e01402b1SRalf Baechle 784b618336aSKevin D. Kissell /* 785b618336aSKevin D. Kissell * SMTC/SMVP kernels manage VPE enable independently, 786b618336aSKevin D. Kissell * but uniprocessor kernels need to turn it on, even 787b618336aSKevin D. Kissell * if that wasn't the pre-dvpe() state. 788b618336aSKevin D. Kissell */ 78907cc0c9eSRalf Baechle #ifdef CONFIG_SMP 79007cc0c9eSRalf Baechle evpe(vpeflags); 791b618336aSKevin D. Kissell #else 792b618336aSKevin D. Kissell evpe(EVPE_ENABLE); 79307cc0c9eSRalf Baechle #endif 79407cc0c9eSRalf Baechle emt(dmt_flag); 79507cc0c9eSRalf Baechle local_irq_restore(flags); 796e01402b1SRalf Baechle 79707cc0c9eSRalf Baechle list_for_each_entry(n, &v->notify, list) 79807cc0c9eSRalf Baechle n->start(minor); 7992600990eSRalf Baechle 800e01402b1SRalf Baechle return 0; 801e01402b1SRalf Baechle } 802e01402b1SRalf Baechle 8032600990eSRalf Baechle static int find_vpe_symbols(struct vpe * v, Elf_Shdr * sechdrs, 804e01402b1SRalf Baechle unsigned int symindex, const char *strtab, 805e01402b1SRalf Baechle struct module *mod) 806e01402b1SRalf Baechle { 807e01402b1SRalf Baechle Elf_Sym *sym = (void *)sechdrs[symindex].sh_addr; 808e01402b1SRalf Baechle unsigned int i, n = sechdrs[symindex].sh_size / sizeof(Elf_Sym); 809e01402b1SRalf Baechle 810e01402b1SRalf Baechle for (i = 1; i < n; i++) { 811e01402b1SRalf Baechle if (strcmp(strtab + sym[i].st_name, "__start") == 0) { 812e01402b1SRalf Baechle v->__start = sym[i].st_value; 813e01402b1SRalf Baechle } 814e01402b1SRalf Baechle 815e01402b1SRalf Baechle if (strcmp(strtab + sym[i].st_name, "vpe_shared") == 0) { 816e01402b1SRalf Baechle v->shared_ptr = (void *)sym[i].st_value; 817e01402b1SRalf Baechle } 818e01402b1SRalf Baechle } 819e01402b1SRalf Baechle 8202600990eSRalf Baechle if ( (v->__start == 0) || (v->shared_ptr == NULL)) 8212600990eSRalf Baechle return -1; 8222600990eSRalf Baechle 823e01402b1SRalf Baechle return 0; 824e01402b1SRalf Baechle } 825e01402b1SRalf Baechle 826307bd284SRalf Baechle /* 8272600990eSRalf Baechle * Allocates a VPE with some program code space(the load address), copies the 8282600990eSRalf Baechle * contents of the program (p)buffer performing relocatations/etc, free's it 8292600990eSRalf Baechle * when finished. 830e01402b1SRalf Baechle */ 831be6e1437SRalf Baechle static int vpe_elfload(struct vpe * v) 832e01402b1SRalf Baechle { 833e01402b1SRalf Baechle Elf_Ehdr *hdr; 834e01402b1SRalf Baechle Elf_Shdr *sechdrs; 835e01402b1SRalf Baechle long err = 0; 836e01402b1SRalf Baechle char *secstrings, *strtab = NULL; 8372600990eSRalf Baechle unsigned int len, i, symindex = 0, strindex = 0, relocate = 0; 838e01402b1SRalf Baechle struct module mod; // so we can re-use the relocations code 839e01402b1SRalf Baechle 840e01402b1SRalf Baechle memset(&mod, 0, sizeof(struct module)); 8412600990eSRalf Baechle strcpy(mod.name, "VPE loader"); 842e01402b1SRalf Baechle 843e01402b1SRalf Baechle hdr = (Elf_Ehdr *) v->pbuffer; 844e01402b1SRalf Baechle len = v->plen; 845e01402b1SRalf Baechle 846e01402b1SRalf Baechle /* Sanity checks against insmoding binaries or wrong arch, 847e01402b1SRalf Baechle weird elf version */ 848d303f4a1SCyrill Gorcunov if (memcmp(hdr->e_ident, ELFMAG, SELFMAG) != 0 8492600990eSRalf Baechle || (hdr->e_type != ET_REL && hdr->e_type != ET_EXEC) 8502600990eSRalf Baechle || !elf_check_arch(hdr) 851e01402b1SRalf Baechle || hdr->e_shentsize != sizeof(*sechdrs)) { 852e01402b1SRalf Baechle printk(KERN_WARNING 8532600990eSRalf Baechle "VPE loader: program wrong arch or weird elf version\n"); 854e01402b1SRalf Baechle 855e01402b1SRalf Baechle return -ENOEXEC; 856e01402b1SRalf Baechle } 857e01402b1SRalf Baechle 8582600990eSRalf Baechle if (hdr->e_type == ET_REL) 8592600990eSRalf Baechle relocate = 1; 8602600990eSRalf Baechle 861e01402b1SRalf Baechle if (len < hdr->e_shoff + hdr->e_shnum * sizeof(Elf_Shdr)) { 8622600990eSRalf Baechle printk(KERN_ERR "VPE loader: program length %u truncated\n", 8632600990eSRalf Baechle len); 8642600990eSRalf Baechle 865e01402b1SRalf Baechle return -ENOEXEC; 866e01402b1SRalf Baechle } 867e01402b1SRalf Baechle 868e01402b1SRalf Baechle /* Convenience variables */ 869e01402b1SRalf Baechle sechdrs = (void *)hdr + hdr->e_shoff; 870e01402b1SRalf Baechle secstrings = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset; 871e01402b1SRalf Baechle sechdrs[0].sh_addr = 0; 872e01402b1SRalf Baechle 873e01402b1SRalf Baechle /* And these should exist, but gcc whinges if we don't init them */ 874e01402b1SRalf Baechle symindex = strindex = 0; 875e01402b1SRalf Baechle 8762600990eSRalf Baechle if (relocate) { 877e01402b1SRalf Baechle for (i = 1; i < hdr->e_shnum; i++) { 878e01402b1SRalf Baechle if (sechdrs[i].sh_type != SHT_NOBITS 879e01402b1SRalf Baechle && len < sechdrs[i].sh_offset + sechdrs[i].sh_size) { 880e01402b1SRalf Baechle printk(KERN_ERR "VPE program length %u truncated\n", 881e01402b1SRalf Baechle len); 882e01402b1SRalf Baechle return -ENOEXEC; 883e01402b1SRalf Baechle } 884e01402b1SRalf Baechle 885e01402b1SRalf Baechle /* Mark all sections sh_addr with their address in the 886e01402b1SRalf Baechle temporary image. */ 887e01402b1SRalf Baechle sechdrs[i].sh_addr = (size_t) hdr + sechdrs[i].sh_offset; 888e01402b1SRalf Baechle 889e01402b1SRalf Baechle /* Internal symbols and strings. */ 890e01402b1SRalf Baechle if (sechdrs[i].sh_type == SHT_SYMTAB) { 891e01402b1SRalf Baechle symindex = i; 892e01402b1SRalf Baechle strindex = sechdrs[i].sh_link; 893e01402b1SRalf Baechle strtab = (char *)hdr + sechdrs[strindex].sh_offset; 894e01402b1SRalf Baechle } 895e01402b1SRalf Baechle } 896e01402b1SRalf Baechle layout_sections(&mod, hdr, sechdrs, secstrings); 8972600990eSRalf Baechle } 898e01402b1SRalf Baechle 899e01402b1SRalf Baechle v->load_addr = alloc_progmem(mod.core_size); 9005408c490SRalf Baechle if (!v->load_addr) 9015408c490SRalf Baechle return -ENOMEM; 902e01402b1SRalf Baechle 9035408c490SRalf Baechle pr_info("VPE loader: loading to %p\n", v->load_addr); 904e01402b1SRalf Baechle 9052600990eSRalf Baechle if (relocate) { 906e01402b1SRalf Baechle for (i = 0; i < hdr->e_shnum; i++) { 907e01402b1SRalf Baechle void *dest; 908e01402b1SRalf Baechle 909e01402b1SRalf Baechle if (!(sechdrs[i].sh_flags & SHF_ALLOC)) 910e01402b1SRalf Baechle continue; 911e01402b1SRalf Baechle 912e01402b1SRalf Baechle dest = v->load_addr + sechdrs[i].sh_entsize; 913e01402b1SRalf Baechle 914e01402b1SRalf Baechle if (sechdrs[i].sh_type != SHT_NOBITS) 915e01402b1SRalf Baechle memcpy(dest, (void *)sechdrs[i].sh_addr, 916e01402b1SRalf Baechle sechdrs[i].sh_size); 917e01402b1SRalf Baechle /* Update sh_addr to point to copy in image. */ 918e01402b1SRalf Baechle sechdrs[i].sh_addr = (unsigned long)dest; 9192600990eSRalf Baechle 9202600990eSRalf Baechle printk(KERN_DEBUG " section sh_name %s sh_addr 0x%x\n", 9212600990eSRalf Baechle secstrings + sechdrs[i].sh_name, sechdrs[i].sh_addr); 922e01402b1SRalf Baechle } 923e01402b1SRalf Baechle 924e01402b1SRalf Baechle /* Fix up syms, so that st_value is a pointer to location. */ 925e01402b1SRalf Baechle simplify_symbols(sechdrs, symindex, strtab, secstrings, 926e01402b1SRalf Baechle hdr->e_shnum, &mod); 927e01402b1SRalf Baechle 928e01402b1SRalf Baechle /* Now do relocations. */ 929e01402b1SRalf Baechle for (i = 1; i < hdr->e_shnum; i++) { 930e01402b1SRalf Baechle const char *strtab = (char *)sechdrs[strindex].sh_addr; 931e01402b1SRalf Baechle unsigned int info = sechdrs[i].sh_info; 932e01402b1SRalf Baechle 933e01402b1SRalf Baechle /* Not a valid relocation section? */ 934e01402b1SRalf Baechle if (info >= hdr->e_shnum) 935e01402b1SRalf Baechle continue; 936e01402b1SRalf Baechle 937e01402b1SRalf Baechle /* Don't bother with non-allocated sections */ 938e01402b1SRalf Baechle if (!(sechdrs[info].sh_flags & SHF_ALLOC)) 939e01402b1SRalf Baechle continue; 940e01402b1SRalf Baechle 941e01402b1SRalf Baechle if (sechdrs[i].sh_type == SHT_REL) 9422600990eSRalf Baechle err = apply_relocations(sechdrs, strtab, symindex, i, 9432600990eSRalf Baechle &mod); 944e01402b1SRalf Baechle else if (sechdrs[i].sh_type == SHT_RELA) 945e01402b1SRalf Baechle err = apply_relocate_add(sechdrs, strtab, symindex, i, 946e01402b1SRalf Baechle &mod); 9472600990eSRalf Baechle if (err < 0) 9482600990eSRalf Baechle return err; 9492600990eSRalf Baechle 9502600990eSRalf Baechle } 9512600990eSRalf Baechle } else { 952bdf5d42cSRalf Baechle struct elf_phdr *phdr = (struct elf_phdr *) ((char *)hdr + hdr->e_phoff); 9532600990eSRalf Baechle 954bdf5d42cSRalf Baechle for (i = 0; i < hdr->e_phnum; i++) { 955b618336aSKevin D. Kissell if (phdr->p_type == PT_LOAD) { 956b618336aSKevin D. Kissell memcpy((void *)phdr->p_paddr, 957b618336aSKevin D. Kissell (char *)hdr + phdr->p_offset, 958b618336aSKevin D. Kissell phdr->p_filesz); 959b618336aSKevin D. Kissell memset((void *)phdr->p_paddr + phdr->p_filesz, 960b618336aSKevin D. Kissell 0, phdr->p_memsz - phdr->p_filesz); 961b618336aSKevin D. Kissell } 962bdf5d42cSRalf Baechle phdr++; 963bdf5d42cSRalf Baechle } 964bdf5d42cSRalf Baechle 965bdf5d42cSRalf Baechle for (i = 0; i < hdr->e_shnum; i++) { 9662600990eSRalf Baechle /* Internal symbols and strings. */ 9672600990eSRalf Baechle if (sechdrs[i].sh_type == SHT_SYMTAB) { 9682600990eSRalf Baechle symindex = i; 9692600990eSRalf Baechle strindex = sechdrs[i].sh_link; 9702600990eSRalf Baechle strtab = (char *)hdr + sechdrs[strindex].sh_offset; 9712600990eSRalf Baechle 9722600990eSRalf Baechle /* mark the symtab's address for when we try to find the 9732600990eSRalf Baechle magic symbols */ 9742600990eSRalf Baechle sechdrs[i].sh_addr = (size_t) hdr + sechdrs[i].sh_offset; 9752600990eSRalf Baechle } 976e01402b1SRalf Baechle } 977e01402b1SRalf Baechle } 978e01402b1SRalf Baechle 979e01402b1SRalf Baechle /* make sure it's physically written out */ 980e01402b1SRalf Baechle flush_icache_range((unsigned long)v->load_addr, 981e01402b1SRalf Baechle (unsigned long)v->load_addr + v->len); 982e01402b1SRalf Baechle 983e01402b1SRalf Baechle if ((find_vpe_symbols(v, sechdrs, symindex, strtab, &mod)) < 0) { 9842600990eSRalf Baechle if (v->__start == 0) { 9852600990eSRalf Baechle printk(KERN_WARNING "VPE loader: program does not contain " 9862600990eSRalf Baechle "a __start symbol\n"); 9872600990eSRalf Baechle return -ENOEXEC; 9882600990eSRalf Baechle } 989e01402b1SRalf Baechle 9902600990eSRalf Baechle if (v->shared_ptr == NULL) 9912600990eSRalf Baechle printk(KERN_WARNING "VPE loader: " 9922600990eSRalf Baechle "program does not contain vpe_shared symbol.\n" 9932600990eSRalf Baechle " Unable to use AMVP (AP/SP) facilities.\n"); 994e01402b1SRalf Baechle } 995e01402b1SRalf Baechle 996e01402b1SRalf Baechle printk(" elf loaded\n"); 9972600990eSRalf Baechle return 0; 998e01402b1SRalf Baechle } 999e01402b1SRalf Baechle 10002600990eSRalf Baechle static void cleanup_tc(struct tc *tc) 1001e01402b1SRalf Baechle { 100207cc0c9eSRalf Baechle unsigned long flags; 100307cc0c9eSRalf Baechle unsigned int mtflags, vpflags; 10042600990eSRalf Baechle int tmp; 1005e01402b1SRalf Baechle 100607cc0c9eSRalf Baechle local_irq_save(flags); 100707cc0c9eSRalf Baechle mtflags = dmt(); 100807cc0c9eSRalf Baechle vpflags = dvpe(); 10092600990eSRalf Baechle /* Put MVPE's into 'configuration state' */ 10102600990eSRalf Baechle set_c0_mvpcontrol(MVPCONTROL_VPC); 1011e01402b1SRalf Baechle 10122600990eSRalf Baechle settc(tc->index); 1013e01402b1SRalf Baechle tmp = read_tc_c0_tcstatus(); 1014e01402b1SRalf Baechle 1015e01402b1SRalf Baechle /* mark not allocated and not dynamically allocatable */ 1016e01402b1SRalf Baechle tmp &= ~(TCSTATUS_A | TCSTATUS_DA); 1017e01402b1SRalf Baechle tmp |= TCSTATUS_IXMT; /* interrupt exempt */ 1018e01402b1SRalf Baechle write_tc_c0_tcstatus(tmp); 1019e01402b1SRalf Baechle 1020e01402b1SRalf Baechle write_tc_c0_tchalt(TCHALT_H); 10217c3a622dSNigel Stephens mips_ihb(); 1022e01402b1SRalf Baechle 10232600990eSRalf Baechle /* bind it to anything other than VPE1 */ 102407cc0c9eSRalf Baechle // write_tc_c0_tcbind(read_tc_c0_tcbind() & ~TCBIND_CURVPE); // | TCBIND_CURVPE 10252600990eSRalf Baechle 10262600990eSRalf Baechle clear_c0_mvpcontrol(MVPCONTROL_VPC); 102707cc0c9eSRalf Baechle evpe(vpflags); 102807cc0c9eSRalf Baechle emt(mtflags); 102907cc0c9eSRalf Baechle local_irq_restore(flags); 10302600990eSRalf Baechle } 10312600990eSRalf Baechle 10322600990eSRalf Baechle static int getcwd(char *buff, int size) 10332600990eSRalf Baechle { 10342600990eSRalf Baechle mm_segment_t old_fs; 10352600990eSRalf Baechle int ret; 10362600990eSRalf Baechle 10372600990eSRalf Baechle old_fs = get_fs(); 10382600990eSRalf Baechle set_fs(KERNEL_DS); 10392600990eSRalf Baechle 10402600990eSRalf Baechle ret = sys_getcwd(buff, size); 10412600990eSRalf Baechle 10422600990eSRalf Baechle set_fs(old_fs); 10432600990eSRalf Baechle 10442600990eSRalf Baechle return ret; 10452600990eSRalf Baechle } 10462600990eSRalf Baechle 10472600990eSRalf Baechle /* checks VPE is unused and gets ready to load program */ 10482600990eSRalf Baechle static int vpe_open(struct inode *inode, struct file *filp) 10492600990eSRalf Baechle { 1050c4c4018bSRalf Baechle enum vpe_state state; 10512600990eSRalf Baechle struct vpe_notifications *not; 105207cc0c9eSRalf Baechle struct vpe *v; 105307cc0c9eSRalf Baechle int ret; 10542600990eSRalf Baechle 105507cc0c9eSRalf Baechle if (minor != iminor(inode)) { 105607cc0c9eSRalf Baechle /* assume only 1 device at the moment. */ 10572600990eSRalf Baechle printk(KERN_WARNING "VPE loader: only vpe1 is supported\n"); 10582600990eSRalf Baechle return -ENODEV; 10592600990eSRalf Baechle } 10602600990eSRalf Baechle 106107cc0c9eSRalf Baechle if ((v = get_vpe(tclimit)) == NULL) { 10622600990eSRalf Baechle printk(KERN_WARNING "VPE loader: unable to get vpe\n"); 10632600990eSRalf Baechle return -ENODEV; 10642600990eSRalf Baechle } 10652600990eSRalf Baechle 1066c4c4018bSRalf Baechle state = xchg(&v->state, VPE_STATE_INUSE); 1067c4c4018bSRalf Baechle if (state != VPE_STATE_UNUSED) { 10682600990eSRalf Baechle printk(KERN_DEBUG "VPE loader: tc in use dumping regs\n"); 10692600990eSRalf Baechle 10702600990eSRalf Baechle list_for_each_entry(not, &v->notify, list) { 107107cc0c9eSRalf Baechle not->stop(tclimit); 10722600990eSRalf Baechle } 10732600990eSRalf Baechle 10742600990eSRalf Baechle release_progmem(v->load_addr); 107507cc0c9eSRalf Baechle cleanup_tc(get_tc(tclimit)); 1076e01402b1SRalf Baechle } 1077e01402b1SRalf Baechle 1078e01402b1SRalf Baechle /* this of-course trashes what was there before... */ 1079e01402b1SRalf Baechle v->pbuffer = vmalloc(P_SIZE); 1080e01402b1SRalf Baechle v->plen = P_SIZE; 1081e01402b1SRalf Baechle v->load_addr = NULL; 1082e01402b1SRalf Baechle v->len = 0; 1083e01402b1SRalf Baechle 10842600990eSRalf Baechle v->uid = filp->f_uid; 10852600990eSRalf Baechle v->gid = filp->f_gid; 10862600990eSRalf Baechle 10872600990eSRalf Baechle #ifdef CONFIG_MIPS_APSP_KSPD 10882600990eSRalf Baechle /* get kspd to tell us when a syscall_exit happens */ 10892600990eSRalf Baechle if (!kspd_events_reqd) { 10902600990eSRalf Baechle kspd_notify(&kspd_events); 10912600990eSRalf Baechle kspd_events_reqd++; 10922600990eSRalf Baechle } 10932600990eSRalf Baechle #endif 10942600990eSRalf Baechle 10952600990eSRalf Baechle v->cwd[0] = 0; 10962600990eSRalf Baechle ret = getcwd(v->cwd, VPE_PATH_MAX); 10972600990eSRalf Baechle if (ret < 0) 10982600990eSRalf Baechle printk(KERN_WARNING "VPE loader: open, getcwd returned %d\n", ret); 10992600990eSRalf Baechle 11002600990eSRalf Baechle v->shared_ptr = NULL; 11012600990eSRalf Baechle v->__start = 0; 110207cc0c9eSRalf Baechle 1103e01402b1SRalf Baechle return 0; 1104e01402b1SRalf Baechle } 1105e01402b1SRalf Baechle 1106e01402b1SRalf Baechle static int vpe_release(struct inode *inode, struct file *filp) 1107e01402b1SRalf Baechle { 1108307bd284SRalf Baechle struct vpe *v; 1109e01402b1SRalf Baechle Elf_Ehdr *hdr; 111007cc0c9eSRalf Baechle int ret = 0; 1111e01402b1SRalf Baechle 111207cc0c9eSRalf Baechle v = get_vpe(tclimit); 111307cc0c9eSRalf Baechle if (v == NULL) 1114e01402b1SRalf Baechle return -ENODEV; 1115e01402b1SRalf Baechle 1116e01402b1SRalf Baechle hdr = (Elf_Ehdr *) v->pbuffer; 1117d303f4a1SCyrill Gorcunov if (memcmp(hdr->e_ident, ELFMAG, SELFMAG) == 0) { 111807cc0c9eSRalf Baechle if (vpe_elfload(v) >= 0) { 1119e01402b1SRalf Baechle vpe_run(v); 112007cc0c9eSRalf Baechle } else { 11212600990eSRalf Baechle printk(KERN_WARNING "VPE loader: ELF load failed.\n"); 1122e01402b1SRalf Baechle ret = -ENOEXEC; 1123e01402b1SRalf Baechle } 1124e01402b1SRalf Baechle } else { 11252600990eSRalf Baechle printk(KERN_WARNING "VPE loader: only elf files are supported\n"); 1126e01402b1SRalf Baechle ret = -ENOEXEC; 1127e01402b1SRalf Baechle } 1128e01402b1SRalf Baechle 11292600990eSRalf Baechle /* It's good to be able to run the SP and if it chokes have a look at 11302600990eSRalf Baechle the /dev/rt?. But if we reset the pointer to the shared struct we 11312600990eSRalf Baechle loose what has happened. So perhaps if garbage is sent to the vpe 11322600990eSRalf Baechle device, use it as a trigger for the reset. Hopefully a nice 11332600990eSRalf Baechle executable will be along shortly. */ 11342600990eSRalf Baechle if (ret < 0) 11352600990eSRalf Baechle v->shared_ptr = NULL; 11362600990eSRalf Baechle 1137e01402b1SRalf Baechle // cleanup any temp buffers 1138e01402b1SRalf Baechle if (v->pbuffer) 1139e01402b1SRalf Baechle vfree(v->pbuffer); 1140e01402b1SRalf Baechle v->plen = 0; 1141e01402b1SRalf Baechle return ret; 1142e01402b1SRalf Baechle } 1143e01402b1SRalf Baechle 1144e01402b1SRalf Baechle static ssize_t vpe_write(struct file *file, const char __user * buffer, 1145e01402b1SRalf Baechle size_t count, loff_t * ppos) 1146e01402b1SRalf Baechle { 1147e01402b1SRalf Baechle size_t ret = count; 1148307bd284SRalf Baechle struct vpe *v; 1149e01402b1SRalf Baechle 115007cc0c9eSRalf Baechle if (iminor(file->f_path.dentry->d_inode) != minor) 115107cc0c9eSRalf Baechle return -ENODEV; 115207cc0c9eSRalf Baechle 115307cc0c9eSRalf Baechle v = get_vpe(tclimit); 115407cc0c9eSRalf Baechle if (v == NULL) 1155e01402b1SRalf Baechle return -ENODEV; 1156e01402b1SRalf Baechle 1157e01402b1SRalf Baechle if (v->pbuffer == NULL) { 11582600990eSRalf Baechle printk(KERN_ERR "VPE loader: no buffer for program\n"); 1159e01402b1SRalf Baechle return -ENOMEM; 1160e01402b1SRalf Baechle } 1161e01402b1SRalf Baechle 1162e01402b1SRalf Baechle if ((count + v->len) > v->plen) { 1163e01402b1SRalf Baechle printk(KERN_WARNING 11642600990eSRalf Baechle "VPE loader: elf size too big. Perhaps strip uneeded symbols\n"); 1165e01402b1SRalf Baechle return -ENOMEM; 1166e01402b1SRalf Baechle } 1167e01402b1SRalf Baechle 1168e01402b1SRalf Baechle count -= copy_from_user(v->pbuffer + v->len, buffer, count); 11692600990eSRalf Baechle if (!count) 1170e01402b1SRalf Baechle return -EFAULT; 1171e01402b1SRalf Baechle 1172e01402b1SRalf Baechle v->len += count; 1173e01402b1SRalf Baechle return ret; 1174e01402b1SRalf Baechle } 1175e01402b1SRalf Baechle 11765dfe4c96SArjan van de Ven static const struct file_operations vpe_fops = { 1177e01402b1SRalf Baechle .owner = THIS_MODULE, 1178e01402b1SRalf Baechle .open = vpe_open, 1179e01402b1SRalf Baechle .release = vpe_release, 1180e01402b1SRalf Baechle .write = vpe_write 1181e01402b1SRalf Baechle }; 1182e01402b1SRalf Baechle 1183e01402b1SRalf Baechle /* module wrapper entry points */ 1184e01402b1SRalf Baechle /* give me a vpe */ 1185e01402b1SRalf Baechle vpe_handle vpe_alloc(void) 1186e01402b1SRalf Baechle { 1187e01402b1SRalf Baechle int i; 1188e01402b1SRalf Baechle struct vpe *v; 1189e01402b1SRalf Baechle 1190e01402b1SRalf Baechle /* find a vpe */ 1191e01402b1SRalf Baechle for (i = 1; i < MAX_VPES; i++) { 1192e01402b1SRalf Baechle if ((v = get_vpe(i)) != NULL) { 1193e01402b1SRalf Baechle v->state = VPE_STATE_INUSE; 1194e01402b1SRalf Baechle return v; 1195e01402b1SRalf Baechle } 1196e01402b1SRalf Baechle } 1197e01402b1SRalf Baechle return NULL; 1198e01402b1SRalf Baechle } 1199e01402b1SRalf Baechle 1200e01402b1SRalf Baechle EXPORT_SYMBOL(vpe_alloc); 1201e01402b1SRalf Baechle 1202e01402b1SRalf Baechle /* start running from here */ 1203e01402b1SRalf Baechle int vpe_start(vpe_handle vpe, unsigned long start) 1204e01402b1SRalf Baechle { 1205e01402b1SRalf Baechle struct vpe *v = vpe; 1206e01402b1SRalf Baechle 1207e01402b1SRalf Baechle v->__start = start; 1208e01402b1SRalf Baechle return vpe_run(v); 1209e01402b1SRalf Baechle } 1210e01402b1SRalf Baechle 1211e01402b1SRalf Baechle EXPORT_SYMBOL(vpe_start); 1212e01402b1SRalf Baechle 1213e01402b1SRalf Baechle /* halt it for now */ 1214e01402b1SRalf Baechle int vpe_stop(vpe_handle vpe) 1215e01402b1SRalf Baechle { 1216e01402b1SRalf Baechle struct vpe *v = vpe; 1217e01402b1SRalf Baechle struct tc *t; 1218e01402b1SRalf Baechle unsigned int evpe_flags; 1219e01402b1SRalf Baechle 1220e01402b1SRalf Baechle evpe_flags = dvpe(); 1221e01402b1SRalf Baechle 1222e01402b1SRalf Baechle if ((t = list_entry(v->tc.next, struct tc, tc)) != NULL) { 1223e01402b1SRalf Baechle 1224e01402b1SRalf Baechle settc(t->index); 1225e01402b1SRalf Baechle write_vpe_c0_vpeconf0(read_vpe_c0_vpeconf0() & ~VPECONF0_VPA); 1226e01402b1SRalf Baechle } 1227e01402b1SRalf Baechle 1228e01402b1SRalf Baechle evpe(evpe_flags); 1229e01402b1SRalf Baechle 1230e01402b1SRalf Baechle return 0; 1231e01402b1SRalf Baechle } 1232e01402b1SRalf Baechle 1233e01402b1SRalf Baechle EXPORT_SYMBOL(vpe_stop); 1234e01402b1SRalf Baechle 1235e01402b1SRalf Baechle /* I've done with it thank you */ 1236e01402b1SRalf Baechle int vpe_free(vpe_handle vpe) 1237e01402b1SRalf Baechle { 1238e01402b1SRalf Baechle struct vpe *v = vpe; 1239e01402b1SRalf Baechle struct tc *t; 1240e01402b1SRalf Baechle unsigned int evpe_flags; 1241e01402b1SRalf Baechle 1242e01402b1SRalf Baechle if ((t = list_entry(v->tc.next, struct tc, tc)) == NULL) { 1243e01402b1SRalf Baechle return -ENOEXEC; 1244e01402b1SRalf Baechle } 1245e01402b1SRalf Baechle 1246e01402b1SRalf Baechle evpe_flags = dvpe(); 1247e01402b1SRalf Baechle 1248e01402b1SRalf Baechle /* Put MVPE's into 'configuration state' */ 1249340ee4b9SRalf Baechle set_c0_mvpcontrol(MVPCONTROL_VPC); 1250e01402b1SRalf Baechle 1251e01402b1SRalf Baechle settc(t->index); 1252e01402b1SRalf Baechle write_vpe_c0_vpeconf0(read_vpe_c0_vpeconf0() & ~VPECONF0_VPA); 1253e01402b1SRalf Baechle 12547c3a622dSNigel Stephens /* halt the TC */ 1255e01402b1SRalf Baechle write_tc_c0_tchalt(TCHALT_H); 12567c3a622dSNigel Stephens mips_ihb(); 12577c3a622dSNigel Stephens 12587c3a622dSNigel Stephens /* mark the TC unallocated */ 12597c3a622dSNigel Stephens write_tc_c0_tcstatus(read_tc_c0_tcstatus() & ~TCSTATUS_A); 1260e01402b1SRalf Baechle 1261e01402b1SRalf Baechle v->state = VPE_STATE_UNUSED; 1262e01402b1SRalf Baechle 1263340ee4b9SRalf Baechle clear_c0_mvpcontrol(MVPCONTROL_VPC); 1264e01402b1SRalf Baechle evpe(evpe_flags); 1265e01402b1SRalf Baechle 1266e01402b1SRalf Baechle return 0; 1267e01402b1SRalf Baechle } 1268e01402b1SRalf Baechle 1269e01402b1SRalf Baechle EXPORT_SYMBOL(vpe_free); 1270e01402b1SRalf Baechle 1271e01402b1SRalf Baechle void *vpe_get_shared(int index) 1272e01402b1SRalf Baechle { 1273e01402b1SRalf Baechle struct vpe *v; 1274e01402b1SRalf Baechle 12752600990eSRalf Baechle if ((v = get_vpe(index)) == NULL) 1276e01402b1SRalf Baechle return NULL; 1277e01402b1SRalf Baechle 1278e01402b1SRalf Baechle return v->shared_ptr; 1279e01402b1SRalf Baechle } 1280e01402b1SRalf Baechle 1281e01402b1SRalf Baechle EXPORT_SYMBOL(vpe_get_shared); 1282e01402b1SRalf Baechle 12832600990eSRalf Baechle int vpe_getuid(int index) 12842600990eSRalf Baechle { 12852600990eSRalf Baechle struct vpe *v; 12862600990eSRalf Baechle 12872600990eSRalf Baechle if ((v = get_vpe(index)) == NULL) 12882600990eSRalf Baechle return -1; 12892600990eSRalf Baechle 12902600990eSRalf Baechle return v->uid; 12912600990eSRalf Baechle } 12922600990eSRalf Baechle 12932600990eSRalf Baechle EXPORT_SYMBOL(vpe_getuid); 12942600990eSRalf Baechle 12952600990eSRalf Baechle int vpe_getgid(int index) 12962600990eSRalf Baechle { 12972600990eSRalf Baechle struct vpe *v; 12982600990eSRalf Baechle 12992600990eSRalf Baechle if ((v = get_vpe(index)) == NULL) 13002600990eSRalf Baechle return -1; 13012600990eSRalf Baechle 13022600990eSRalf Baechle return v->gid; 13032600990eSRalf Baechle } 13042600990eSRalf Baechle 13052600990eSRalf Baechle EXPORT_SYMBOL(vpe_getgid); 13062600990eSRalf Baechle 13072600990eSRalf Baechle int vpe_notify(int index, struct vpe_notifications *notify) 13082600990eSRalf Baechle { 13092600990eSRalf Baechle struct vpe *v; 13102600990eSRalf Baechle 13112600990eSRalf Baechle if ((v = get_vpe(index)) == NULL) 13122600990eSRalf Baechle return -1; 13132600990eSRalf Baechle 13142600990eSRalf Baechle list_add(¬ify->list, &v->notify); 13152600990eSRalf Baechle return 0; 13162600990eSRalf Baechle } 13172600990eSRalf Baechle 13182600990eSRalf Baechle EXPORT_SYMBOL(vpe_notify); 13192600990eSRalf Baechle 13202600990eSRalf Baechle char *vpe_getcwd(int index) 13212600990eSRalf Baechle { 13222600990eSRalf Baechle struct vpe *v; 13232600990eSRalf Baechle 13242600990eSRalf Baechle if ((v = get_vpe(index)) == NULL) 13252600990eSRalf Baechle return NULL; 13262600990eSRalf Baechle 13272600990eSRalf Baechle return v->cwd; 13282600990eSRalf Baechle } 13292600990eSRalf Baechle 13302600990eSRalf Baechle EXPORT_SYMBOL(vpe_getcwd); 13312600990eSRalf Baechle 13322600990eSRalf Baechle #ifdef CONFIG_MIPS_APSP_KSPD 13332600990eSRalf Baechle static void kspd_sp_exit( int sp_id) 13342600990eSRalf Baechle { 13352600990eSRalf Baechle cleanup_tc(get_tc(sp_id)); 13362600990eSRalf Baechle } 13372600990eSRalf Baechle #endif 13382600990eSRalf Baechle 1339736fad17SKay Sievers static ssize_t store_kill(struct device *dev, struct device_attribute *attr, 1340736fad17SKay Sievers const char *buf, size_t len) 13410f5d0df3SRalf Baechle { 13420f5d0df3SRalf Baechle struct vpe *vpe = get_vpe(tclimit); 13430f5d0df3SRalf Baechle struct vpe_notifications *not; 13440f5d0df3SRalf Baechle 13450f5d0df3SRalf Baechle list_for_each_entry(not, &vpe->notify, list) { 13460f5d0df3SRalf Baechle not->stop(tclimit); 13470f5d0df3SRalf Baechle } 13480f5d0df3SRalf Baechle 13490f5d0df3SRalf Baechle release_progmem(vpe->load_addr); 13500f5d0df3SRalf Baechle cleanup_tc(get_tc(tclimit)); 13510f5d0df3SRalf Baechle vpe_stop(vpe); 13520f5d0df3SRalf Baechle vpe_free(vpe); 13530f5d0df3SRalf Baechle 13540f5d0df3SRalf Baechle return len; 13550f5d0df3SRalf Baechle } 13560f5d0df3SRalf Baechle 1357736fad17SKay Sievers static ssize_t show_ntcs(struct device *cd, struct device_attribute *attr, 1358736fad17SKay Sievers char *buf) 135941790e04SRalf Baechle { 136041790e04SRalf Baechle struct vpe *vpe = get_vpe(tclimit); 136141790e04SRalf Baechle 136241790e04SRalf Baechle return sprintf(buf, "%d\n", vpe->ntcs); 136341790e04SRalf Baechle } 136441790e04SRalf Baechle 1365736fad17SKay Sievers static ssize_t store_ntcs(struct device *dev, struct device_attribute *attr, 1366736fad17SKay Sievers const char *buf, size_t len) 136741790e04SRalf Baechle { 136841790e04SRalf Baechle struct vpe *vpe = get_vpe(tclimit); 136941790e04SRalf Baechle unsigned long new; 137041790e04SRalf Baechle char *endp; 137141790e04SRalf Baechle 137241790e04SRalf Baechle new = simple_strtoul(buf, &endp, 0); 137341790e04SRalf Baechle if (endp == buf) 137441790e04SRalf Baechle goto out_einval; 137541790e04SRalf Baechle 137641790e04SRalf Baechle if (new == 0 || new > (hw_tcs - tclimit)) 137741790e04SRalf Baechle goto out_einval; 137841790e04SRalf Baechle 137941790e04SRalf Baechle vpe->ntcs = new; 138041790e04SRalf Baechle 138141790e04SRalf Baechle return len; 138241790e04SRalf Baechle 138341790e04SRalf Baechle out_einval: 138441790e04SRalf Baechle return -EINVAL;; 138541790e04SRalf Baechle } 138641790e04SRalf Baechle 1387736fad17SKay Sievers static struct device_attribute vpe_class_attributes[] = { 13880f5d0df3SRalf Baechle __ATTR(kill, S_IWUSR, NULL, store_kill), 138941790e04SRalf Baechle __ATTR(ntcs, S_IRUGO | S_IWUSR, show_ntcs, store_ntcs), 139041790e04SRalf Baechle {} 139141790e04SRalf Baechle }; 139241790e04SRalf Baechle 1393736fad17SKay Sievers static void vpe_device_release(struct device *cd) 139441790e04SRalf Baechle { 139541790e04SRalf Baechle kfree(cd); 139641790e04SRalf Baechle } 139741790e04SRalf Baechle 139841790e04SRalf Baechle struct class vpe_class = { 139941790e04SRalf Baechle .name = "vpe", 140041790e04SRalf Baechle .owner = THIS_MODULE, 1401736fad17SKay Sievers .dev_release = vpe_device_release, 1402736fad17SKay Sievers .dev_attrs = vpe_class_attributes, 140341790e04SRalf Baechle }; 140441790e04SRalf Baechle 1405736fad17SKay Sievers struct device vpe_device; 140627a3bbafSRalf Baechle 1407e01402b1SRalf Baechle static int __init vpe_module_init(void) 1408e01402b1SRalf Baechle { 140907cc0c9eSRalf Baechle unsigned int mtflags, vpflags; 141007cc0c9eSRalf Baechle unsigned long flags, val; 1411e01402b1SRalf Baechle struct vpe *v = NULL; 1412e01402b1SRalf Baechle struct tc *t; 141341790e04SRalf Baechle int tc, err; 1414e01402b1SRalf Baechle 1415e01402b1SRalf Baechle if (!cpu_has_mipsmt) { 1416e01402b1SRalf Baechle printk("VPE loader: not a MIPS MT capable processor\n"); 1417e01402b1SRalf Baechle return -ENODEV; 1418e01402b1SRalf Baechle } 1419e01402b1SRalf Baechle 142007cc0c9eSRalf Baechle if (vpelimit == 0) { 142107cc0c9eSRalf Baechle printk(KERN_WARNING "No VPEs reserved for AP/SP, not " 142207cc0c9eSRalf Baechle "initializing VPE loader.\nPass maxvpes=<n> argument as " 142307cc0c9eSRalf Baechle "kernel argument\n"); 142407cc0c9eSRalf Baechle 142507cc0c9eSRalf Baechle return -ENODEV; 142607cc0c9eSRalf Baechle } 142707cc0c9eSRalf Baechle 142807cc0c9eSRalf Baechle if (tclimit == 0) { 142907cc0c9eSRalf Baechle printk(KERN_WARNING "No TCs reserved for AP/SP, not " 143007cc0c9eSRalf Baechle "initializing VPE loader.\nPass maxtcs=<n> argument as " 143107cc0c9eSRalf Baechle "kernel argument\n"); 143207cc0c9eSRalf Baechle 143307cc0c9eSRalf Baechle return -ENODEV; 143407cc0c9eSRalf Baechle } 143507cc0c9eSRalf Baechle 1436682e852eSAlexey Dobriyan major = register_chrdev(0, module_name, &vpe_fops); 1437682e852eSAlexey Dobriyan if (major < 0) { 1438e01402b1SRalf Baechle printk("VPE loader: unable to register character device\n"); 1439307bd284SRalf Baechle return major; 1440e01402b1SRalf Baechle } 1441e01402b1SRalf Baechle 144241790e04SRalf Baechle err = class_register(&vpe_class); 144341790e04SRalf Baechle if (err) { 144441790e04SRalf Baechle printk(KERN_ERR "vpe_class registration failed\n"); 144527a3bbafSRalf Baechle goto out_chrdev; 144627a3bbafSRalf Baechle } 144741790e04SRalf Baechle 1448736fad17SKay Sievers device_initialize(&vpe_device); 144941790e04SRalf Baechle vpe_device.class = &vpe_class, 145041790e04SRalf Baechle vpe_device.parent = NULL, 1451736fad17SKay Sievers strlcpy(vpe_device.bus_id, "vpe1", BUS_ID_SIZE); 145241790e04SRalf Baechle vpe_device.devt = MKDEV(major, minor); 1453736fad17SKay Sievers err = device_add(&vpe_device); 145441790e04SRalf Baechle if (err) { 145541790e04SRalf Baechle printk(KERN_ERR "Adding vpe_device failed\n"); 145641790e04SRalf Baechle goto out_class; 145741790e04SRalf Baechle } 145827a3bbafSRalf Baechle 145907cc0c9eSRalf Baechle local_irq_save(flags); 146007cc0c9eSRalf Baechle mtflags = dmt(); 146107cc0c9eSRalf Baechle vpflags = dvpe(); 1462e01402b1SRalf Baechle 1463e01402b1SRalf Baechle /* Put MVPE's into 'configuration state' */ 1464340ee4b9SRalf Baechle set_c0_mvpcontrol(MVPCONTROL_VPC); 1465e01402b1SRalf Baechle 1466e01402b1SRalf Baechle /* dump_mtregs(); */ 1467e01402b1SRalf Baechle 1468e01402b1SRalf Baechle val = read_c0_mvpconf0(); 146907cc0c9eSRalf Baechle hw_tcs = (val & MVPCONF0_PTC) + 1; 147007cc0c9eSRalf Baechle hw_vpes = ((val & MVPCONF0_PVPE) >> MVPCONF0_PVPE_SHIFT) + 1; 147107cc0c9eSRalf Baechle 147207cc0c9eSRalf Baechle for (tc = tclimit; tc < hw_tcs; tc++) { 147307cc0c9eSRalf Baechle /* 147407cc0c9eSRalf Baechle * Must re-enable multithreading temporarily or in case we 147507cc0c9eSRalf Baechle * reschedule send IPIs or similar we might hang. 147607cc0c9eSRalf Baechle */ 147707cc0c9eSRalf Baechle clear_c0_mvpcontrol(MVPCONTROL_VPC); 147807cc0c9eSRalf Baechle evpe(vpflags); 147907cc0c9eSRalf Baechle emt(mtflags); 148007cc0c9eSRalf Baechle local_irq_restore(flags); 148107cc0c9eSRalf Baechle t = alloc_tc(tc); 148207cc0c9eSRalf Baechle if (!t) { 148307cc0c9eSRalf Baechle err = -ENOMEM; 148407cc0c9eSRalf Baechle goto out; 148507cc0c9eSRalf Baechle } 148607cc0c9eSRalf Baechle 148707cc0c9eSRalf Baechle local_irq_save(flags); 148807cc0c9eSRalf Baechle mtflags = dmt(); 148907cc0c9eSRalf Baechle vpflags = dvpe(); 149007cc0c9eSRalf Baechle set_c0_mvpcontrol(MVPCONTROL_VPC); 1491e01402b1SRalf Baechle 1492e01402b1SRalf Baechle /* VPE's */ 149307cc0c9eSRalf Baechle if (tc < hw_tcs) { 149407cc0c9eSRalf Baechle settc(tc); 1495e01402b1SRalf Baechle 149607cc0c9eSRalf Baechle if ((v = alloc_vpe(tc)) == NULL) { 1497e01402b1SRalf Baechle printk(KERN_WARNING "VPE: unable to allocate VPE\n"); 149807cc0c9eSRalf Baechle 149907cc0c9eSRalf Baechle goto out_reenable; 1500e01402b1SRalf Baechle } 1501e01402b1SRalf Baechle 150241790e04SRalf Baechle v->ntcs = hw_tcs - tclimit; 150341790e04SRalf Baechle 15042600990eSRalf Baechle /* add the tc to the list of this vpe's tc's. */ 15052600990eSRalf Baechle list_add(&t->tc, &v->tc); 1506e01402b1SRalf Baechle 1507e01402b1SRalf Baechle /* deactivate all but vpe0 */ 150807cc0c9eSRalf Baechle if (tc >= tclimit) { 1509e01402b1SRalf Baechle unsigned long tmp = read_vpe_c0_vpeconf0(); 1510e01402b1SRalf Baechle 1511e01402b1SRalf Baechle tmp &= ~VPECONF0_VPA; 1512e01402b1SRalf Baechle 1513e01402b1SRalf Baechle /* master VPE */ 1514e01402b1SRalf Baechle tmp |= VPECONF0_MVP; 1515e01402b1SRalf Baechle write_vpe_c0_vpeconf0(tmp); 1516e01402b1SRalf Baechle } 1517e01402b1SRalf Baechle 1518e01402b1SRalf Baechle /* disable multi-threading with TC's */ 1519e01402b1SRalf Baechle write_vpe_c0_vpecontrol(read_vpe_c0_vpecontrol() & ~VPECONTROL_TE); 1520e01402b1SRalf Baechle 152107cc0c9eSRalf Baechle if (tc >= vpelimit) { 15222600990eSRalf Baechle /* 15232600990eSRalf Baechle * Set config to be the same as vpe0, 15242600990eSRalf Baechle * particularly kseg0 coherency alg 15252600990eSRalf Baechle */ 1526e01402b1SRalf Baechle write_vpe_c0_config(read_c0_config()); 1527e01402b1SRalf Baechle } 1528e01402b1SRalf Baechle } 1529e01402b1SRalf Baechle 1530e01402b1SRalf Baechle /* TC's */ 1531e01402b1SRalf Baechle t->pvpe = v; /* set the parent vpe */ 1532e01402b1SRalf Baechle 153307cc0c9eSRalf Baechle if (tc >= tclimit) { 1534e01402b1SRalf Baechle unsigned long tmp; 1535e01402b1SRalf Baechle 153607cc0c9eSRalf Baechle settc(tc); 1537e01402b1SRalf Baechle 15382600990eSRalf Baechle /* Any TC that is bound to VPE0 gets left as is - in case 15392600990eSRalf Baechle we are running SMTC on VPE0. A TC that is bound to any 15402600990eSRalf Baechle other VPE gets bound to VPE0, ideally I'd like to make 15412600990eSRalf Baechle it homeless but it doesn't appear to let me bind a TC 15422600990eSRalf Baechle to a non-existent VPE. Which is perfectly reasonable. 15432600990eSRalf Baechle 15442600990eSRalf Baechle The (un)bound state is visible to an EJTAG probe so may 15452600990eSRalf Baechle notify GDB... 15462600990eSRalf Baechle */ 15472600990eSRalf Baechle 15482600990eSRalf Baechle if (((tmp = read_tc_c0_tcbind()) & TCBIND_CURVPE)) { 15492600990eSRalf Baechle /* tc is bound >vpe0 */ 15502600990eSRalf Baechle write_tc_c0_tcbind(tmp & ~TCBIND_CURVPE); 15512600990eSRalf Baechle 15522600990eSRalf Baechle t->pvpe = get_vpe(0); /* set the parent vpe */ 15532600990eSRalf Baechle } 1554e01402b1SRalf Baechle 15557c3a622dSNigel Stephens /* halt the TC */ 15567c3a622dSNigel Stephens write_tc_c0_tchalt(TCHALT_H); 15577c3a622dSNigel Stephens mips_ihb(); 15587c3a622dSNigel Stephens 1559e01402b1SRalf Baechle tmp = read_tc_c0_tcstatus(); 1560e01402b1SRalf Baechle 15612600990eSRalf Baechle /* mark not activated and not dynamically allocatable */ 1562e01402b1SRalf Baechle tmp &= ~(TCSTATUS_A | TCSTATUS_DA); 1563e01402b1SRalf Baechle tmp |= TCSTATUS_IXMT; /* interrupt exempt */ 1564e01402b1SRalf Baechle write_tc_c0_tcstatus(tmp); 1565e01402b1SRalf Baechle } 1566e01402b1SRalf Baechle } 1567e01402b1SRalf Baechle 156807cc0c9eSRalf Baechle out_reenable: 1569e01402b1SRalf Baechle /* release config state */ 1570340ee4b9SRalf Baechle clear_c0_mvpcontrol(MVPCONTROL_VPC); 1571e01402b1SRalf Baechle 157207cc0c9eSRalf Baechle evpe(vpflags); 157307cc0c9eSRalf Baechle emt(mtflags); 157407cc0c9eSRalf Baechle local_irq_restore(flags); 157507cc0c9eSRalf Baechle 15762600990eSRalf Baechle #ifdef CONFIG_MIPS_APSP_KSPD 15772600990eSRalf Baechle kspd_events.kspd_sp_exit = kspd_sp_exit; 15782600990eSRalf Baechle #endif 1579e01402b1SRalf Baechle return 0; 158027a3bbafSRalf Baechle 158141790e04SRalf Baechle out_class: 158241790e04SRalf Baechle class_unregister(&vpe_class); 158327a3bbafSRalf Baechle out_chrdev: 158427a3bbafSRalf Baechle unregister_chrdev(major, module_name); 158527a3bbafSRalf Baechle 158607cc0c9eSRalf Baechle out: 158727a3bbafSRalf Baechle return err; 1588e01402b1SRalf Baechle } 1589e01402b1SRalf Baechle 1590e01402b1SRalf Baechle static void __exit vpe_module_exit(void) 1591e01402b1SRalf Baechle { 1592e01402b1SRalf Baechle struct vpe *v, *n; 1593e01402b1SRalf Baechle 1594e01402b1SRalf Baechle list_for_each_entry_safe(v, n, &vpecontrol.vpe_list, list) { 1595e01402b1SRalf Baechle if (v->state != VPE_STATE_UNUSED) { 1596e01402b1SRalf Baechle release_vpe(v); 1597e01402b1SRalf Baechle } 1598e01402b1SRalf Baechle } 1599e01402b1SRalf Baechle 1600736fad17SKay Sievers device_del(&vpe_device); 1601e01402b1SRalf Baechle unregister_chrdev(major, module_name); 1602e01402b1SRalf Baechle } 1603e01402b1SRalf Baechle 1604e01402b1SRalf Baechle module_init(vpe_module_init); 1605e01402b1SRalf Baechle module_exit(vpe_module_exit); 1606e01402b1SRalf Baechle MODULE_DESCRIPTION("MIPS VPE Loader"); 16072600990eSRalf Baechle MODULE_AUTHOR("Elizabeth Oldham, MIPS Technologies, Inc."); 1608e01402b1SRalf Baechle MODULE_LICENSE("GPL"); 1609