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authorSteven Whitehouse <swhiteho@redhat.com>2006-09-28 08:29:59 -0400
committerSteven Whitehouse <swhiteho@redhat.com>2006-09-28 08:29:59 -0400
commit185a257f2f73bcd89050ad02da5bedbc28fc43fa (patch)
tree5e32586114534ed3f2165614cba3d578f5d87307 /arch/mips/kernel
parent3f1a9aaeffd8d1cbc5ab9776c45cbd66af1c9699 (diff)
parenta77c64c1a641950626181b4857abb701d8f38ccc (diff)
Merge branch 'master' into gfs2
Diffstat (limited to 'arch/mips/kernel')
-rw-r--r--arch/mips/kernel/cpu-probe.c62
-rw-r--r--arch/mips/kernel/irixsig.c63
-rw-r--r--arch/mips/kernel/linux32.c10
-rw-r--r--arch/mips/kernel/process.c257
-rw-r--r--arch/mips/kernel/scall32-o32.S2
-rw-r--r--arch/mips/kernel/scall64-64.S2
-rw-r--r--arch/mips/kernel/scall64-n32.S6
-rw-r--r--arch/mips/kernel/scall64-o32.S4
-rw-r--r--arch/mips/kernel/setup.c439
-rw-r--r--arch/mips/kernel/signal.c8
-rw-r--r--arch/mips/kernel/signal32.c7
-rw-r--r--arch/mips/kernel/smp-mt.c2
-rw-r--r--arch/mips/kernel/smtc-asm.S2
-rw-r--r--arch/mips/kernel/syscall.c4
-rw-r--r--arch/mips/kernel/traps.c146
-rw-r--r--arch/mips/kernel/vpe.c6
16 files changed, 561 insertions, 459 deletions
diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c
index aa2caa67299a..9fbf8430c849 100644
--- a/arch/mips/kernel/cpu-probe.c
+++ b/arch/mips/kernel/cpu-probe.c
@@ -38,15 +38,40 @@ static void r3081_wait(void)
38 38
39static void r39xx_wait(void) 39static void r39xx_wait(void)
40{ 40{
41 unsigned long cfg = read_c0_conf(); 41 local_irq_disable();
42 write_c0_conf(cfg | TX39_CONF_HALT); 42 if (!need_resched())
43 write_c0_conf(read_c0_conf() | TX39_CONF_HALT);
44 local_irq_enable();
43} 45}
44 46
47/*
48 * There is a race when WAIT instruction executed with interrupt
49 * enabled.
50 * But it is implementation-dependent wheter the pipelie restarts when
51 * a non-enabled interrupt is requested.
52 */
45static void r4k_wait(void) 53static void r4k_wait(void)
46{ 54{
47 __asm__(".set\tmips3\n\t" 55 __asm__(" .set mips3 \n"
48 "wait\n\t" 56 " wait \n"
49 ".set\tmips0"); 57 " .set mips0 \n");
58}
59
60/*
61 * This variant is preferable as it allows testing need_resched and going to
62 * sleep depending on the outcome atomically. Unfortunately the "It is
63 * implementation-dependent whether the pipeline restarts when a non-enabled
64 * interrupt is requested" restriction in the MIPS32/MIPS64 architecture makes
65 * using this version a gamble.
66 */
67static void r4k_wait_irqoff(void)
68{
69 local_irq_disable();
70 if (!need_resched())
71 __asm__(" .set mips3 \n"
72 " wait \n"
73 " .set mips0 \n");
74 local_irq_enable();
50} 75}
51 76
52/* The Au1xxx wait is available only if using 32khz counter or 77/* The Au1xxx wait is available only if using 32khz counter or
@@ -56,17 +81,17 @@ int allow_au1k_wait;
56static void au1k_wait(void) 81static void au1k_wait(void)
57{ 82{
58 /* using the wait instruction makes CP0 counter unusable */ 83 /* using the wait instruction makes CP0 counter unusable */
59 __asm__(".set mips3\n\t" 84 __asm__(" .set mips3 \n"
60 "cache 0x14, 0(%0)\n\t" 85 " cache 0x14, 0(%0) \n"
61 "cache 0x14, 32(%0)\n\t" 86 " cache 0x14, 32(%0) \n"
62 "sync\n\t" 87 " sync \n"
63 "nop\n\t" 88 " nop \n"
64 "wait\n\t" 89 " wait \n"
65 "nop\n\t" 90 " nop \n"
66 "nop\n\t" 91 " nop \n"
67 "nop\n\t" 92 " nop \n"
68 "nop\n\t" 93 " nop \n"
69 ".set mips0\n\t" 94 " .set mips0 \n"
70 : : "r" (au1k_wait)); 95 : : "r" (au1k_wait));
71} 96}
72 97
@@ -111,7 +136,6 @@ static inline void check_wait(void)
111 case CPU_NEVADA: 136 case CPU_NEVADA:
112 case CPU_RM7000: 137 case CPU_RM7000:
113 case CPU_RM9000: 138 case CPU_RM9000:
114 case CPU_TX49XX:
115 case CPU_4KC: 139 case CPU_4KC:
116 case CPU_4KEC: 140 case CPU_4KEC:
117 case CPU_4KSC: 141 case CPU_4KSC:
@@ -125,6 +149,10 @@ static inline void check_wait(void)
125 cpu_wait = r4k_wait; 149 cpu_wait = r4k_wait;
126 printk(" available.\n"); 150 printk(" available.\n");
127 break; 151 break;
152 case CPU_TX49XX:
153 cpu_wait = r4k_wait_irqoff;
154 printk(" available.\n");
155 break;
128 case CPU_AU1000: 156 case CPU_AU1000:
129 case CPU_AU1100: 157 case CPU_AU1100:
130 case CPU_AU1500: 158 case CPU_AU1500:
diff --git a/arch/mips/kernel/irixsig.c b/arch/mips/kernel/irixsig.c
index 676e868d26fb..2132485caa74 100644
--- a/arch/mips/kernel/irixsig.c
+++ b/arch/mips/kernel/irixsig.c
@@ -17,6 +17,7 @@
17 17
18#include <asm/ptrace.h> 18#include <asm/ptrace.h>
19#include <asm/uaccess.h> 19#include <asm/uaccess.h>
20#include <asm/unistd.h>
20 21
21#undef DEBUG_SIG 22#undef DEBUG_SIG
22 23
@@ -172,11 +173,12 @@ static inline int handle_signal(unsigned long sig, siginfo_t *info,
172 return ret; 173 return ret;
173} 174}
174 175
175asmlinkage int do_irix_signal(sigset_t *oldset, struct pt_regs *regs) 176void do_irix_signal(struct pt_regs *regs)
176{ 177{
177 struct k_sigaction ka; 178 struct k_sigaction ka;
178 siginfo_t info; 179 siginfo_t info;
179 int signr; 180 int signr;
181 sigset_t *oldset;
180 182
181 /* 183 /*
182 * We want the common case to go fast, which is why we may in certain 184 * We want the common case to go fast, which is why we may in certain
@@ -184,19 +186,28 @@ asmlinkage int do_irix_signal(sigset_t *oldset, struct pt_regs *regs)
184 * if so. 186 * if so.
185 */ 187 */
186 if (!user_mode(regs)) 188 if (!user_mode(regs))
187 return 1; 189 return;
188 190
189 if (try_to_freeze()) 191 if (test_thread_flag(TIF_RESTORE_SIGMASK))
190 goto no_signal; 192 oldset = &current->saved_sigmask;
191 193 else
192 if (!oldset)
193 oldset = &current->blocked; 194 oldset = &current->blocked;
194 195
195 signr = get_signal_to_deliver(&info, &ka, regs, NULL); 196 signr = get_signal_to_deliver(&info, &ka, regs, NULL);
196 if (signr > 0) 197 if (signr > 0) {
197 return handle_signal(signr, &info, &ka, oldset, regs); 198 /* Whee! Actually deliver the signal. */
199 if (handle_signal(signr, &info, &ka, oldset, regs) == 0) {
200 /* a signal was successfully delivered; the saved
201 * sigmask will have been stored in the signal frame,
202 * and will be restored by sigreturn, so we can simply
203 * clear the TIF_RESTORE_SIGMASK flag */
204 if (test_thread_flag(TIF_RESTORE_SIGMASK))
205 clear_thread_flag(TIF_RESTORE_SIGMASK);
206 }
207
208 return;
209 }
198 210
199no_signal:
200 /* 211 /*
201 * Who's code doesn't conform to the restartable syscall convention 212 * Who's code doesn't conform to the restartable syscall convention
202 * dies here!!! The li instruction, a single machine instruction, 213 * dies here!!! The li instruction, a single machine instruction,
@@ -208,8 +219,22 @@ no_signal:
208 regs->regs[2] == ERESTARTNOINTR) { 219 regs->regs[2] == ERESTARTNOINTR) {
209 regs->cp0_epc -= 8; 220 regs->cp0_epc -= 8;
210 } 221 }
222 if (regs->regs[2] == ERESTART_RESTARTBLOCK) {
223 regs->regs[2] = __NR_restart_syscall;
224 regs->regs[7] = regs->regs[26];
225 regs->cp0_epc -= 4;
226 }
227 regs->regs[0] = 0; /* Don't deal with this again. */
228 }
229
230 /*
231 * If there's no signal to deliver, we just put the saved sigmask
232 * back
233 */
234 if (test_thread_flag(TIF_RESTORE_SIGMASK)) {
235 clear_thread_flag(TIF_RESTORE_SIGMASK);
236 sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
211 } 237 }
212 return 0;
213} 238}
214 239
215asmlinkage void 240asmlinkage void
@@ -298,6 +323,9 @@ struct sigact_irix5 {
298 int _unused0[2]; 323 int _unused0[2];
299}; 324};
300 325
326#define SIG_SETMASK32 256 /* Goodie from SGI for BSD compatibility:
327 set only the low 32 bit of the sigset. */
328
301#ifdef DEBUG_SIG 329#ifdef DEBUG_SIG
302static inline void dump_sigact_irix5(struct sigact_irix5 *p) 330static inline void dump_sigact_irix5(struct sigact_irix5 *p)
303{ 331{
@@ -413,7 +441,7 @@ asmlinkage int irix_sigprocmask(int how, irix_sigset_t __user *new,
413 441
414asmlinkage int irix_sigsuspend(struct pt_regs *regs) 442asmlinkage int irix_sigsuspend(struct pt_regs *regs)
415{ 443{
416 sigset_t saveset, newset; 444 sigset_t newset;
417 sigset_t __user *uset; 445 sigset_t __user *uset;
418 446
419 uset = (sigset_t __user *) regs->regs[4]; 447 uset = (sigset_t __user *) regs->regs[4];
@@ -422,18 +450,15 @@ asmlinkage int irix_sigsuspend(struct pt_regs *regs)
422 sigdelsetmask(&newset, ~_BLOCKABLE); 450 sigdelsetmask(&newset, ~_BLOCKABLE);
423 451
424 spin_lock_irq(&current->sighand->siglock); 452 spin_lock_irq(&current->sighand->siglock);
425 saveset = current->blocked; 453 current->saved_sigmask = current->blocked;
426 current->blocked = newset; 454 current->blocked = newset;
427 recalc_sigpending(); 455 recalc_sigpending();
428 spin_unlock_irq(&current->sighand->siglock); 456 spin_unlock_irq(&current->sighand->siglock);
429 457
430 regs->regs[2] = -EINTR; 458 current->state = TASK_INTERRUPTIBLE;
431 while (1) { 459 schedule();
432 current->state = TASK_INTERRUPTIBLE; 460 set_thread_flag(TIF_RESTORE_SIGMASK);
433 schedule(); 461 return -ERESTARTNOHAND;
434 if (do_irix_signal(&saveset, regs))
435 return -EINTR;
436 }
437} 462}
438 463
439/* hate hate hate... */ 464/* hate hate hate... */
diff --git a/arch/mips/kernel/linux32.c b/arch/mips/kernel/linux32.c
index 450ac592da57..43b1162d714f 100644
--- a/arch/mips/kernel/linux32.c
+++ b/arch/mips/kernel/linux32.c
@@ -991,7 +991,7 @@ struct sysctl_args32
991 unsigned int __unused[4]; 991 unsigned int __unused[4];
992}; 992};
993 993
994#ifdef CONFIG_SYSCTL 994#ifdef CONFIG_SYSCTL_SYSCALL
995 995
996asmlinkage long sys32_sysctl(struct sysctl_args32 __user *args) 996asmlinkage long sys32_sysctl(struct sysctl_args32 __user *args)
997{ 997{
@@ -1032,7 +1032,7 @@ asmlinkage long sys32_sysctl(struct sysctl_args32 __user *args)
1032 return error; 1032 return error;
1033} 1033}
1034 1034
1035#endif /* CONFIG_SYSCTL */ 1035#endif /* CONFIG_SYSCTL_SYSCALL */
1036 1036
1037asmlinkage long sys32_newuname(struct new_utsname __user * name) 1037asmlinkage long sys32_newuname(struct new_utsname __user * name)
1038{ 1038{
@@ -1296,9 +1296,3 @@ _sys32_clone(nabi_no_regargs struct pt_regs regs)
1296 return do_fork(clone_flags, newsp, &regs, 0, 1296 return do_fork(clone_flags, newsp, &regs, 0,
1297 parent_tidptr, child_tidptr); 1297 parent_tidptr, child_tidptr);
1298} 1298}
1299
1300extern asmlinkage void sys_set_thread_area(u32 addr);
1301asmlinkage void sys32_set_thread_area(u32 addr)
1302{
1303 sys_set_thread_area(AA(addr));
1304}
diff --git a/arch/mips/kernel/process.c b/arch/mips/kernel/process.c
index 7ab67f786bfe..2613a0dd4b82 100644
--- a/arch/mips/kernel/process.c
+++ b/arch/mips/kernel/process.c
@@ -273,104 +273,107 @@ long kernel_thread(int (*fn)(void *), void *arg, unsigned long flags)
273 return do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0, &regs, 0, NULL, NULL); 273 return do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0, &regs, 0, NULL, NULL);
274} 274}
275 275
276static struct mips_frame_info { 276/*
277 void *func; 277 *
278 unsigned long func_size; 278 */
279 int frame_size; 279struct mips_frame_info {
280 int pc_offset; 280 void *func;
281} *schedule_frame, mfinfo[64]; 281 unsigned long func_size;
282static int mfinfo_num; 282 int frame_size;
283 283 int pc_offset;
284static int __init get_frame_info(struct mips_frame_info *info) 284};
285
286static inline int is_ra_save_ins(union mips_instruction *ip)
285{ 287{
286 int i; 288 /* sw / sd $ra, offset($sp) */
287 void *func = info->func; 289 return (ip->i_format.opcode == sw_op || ip->i_format.opcode == sd_op) &&
288 union mips_instruction *ip = (union mips_instruction *)func; 290 ip->i_format.rs == 29 &&
291 ip->i_format.rt == 31;
292}
293
294static inline int is_jal_jalr_jr_ins(union mips_instruction *ip)
295{
296 if (ip->j_format.opcode == jal_op)
297 return 1;
298 if (ip->r_format.opcode != spec_op)
299 return 0;
300 return ip->r_format.func == jalr_op || ip->r_format.func == jr_op;
301}
302
303static inline int is_sp_move_ins(union mips_instruction *ip)
304{
305 /* addiu/daddiu sp,sp,-imm */
306 if (ip->i_format.rs != 29 || ip->i_format.rt != 29)
307 return 0;
308 if (ip->i_format.opcode == addiu_op || ip->i_format.opcode == daddiu_op)
309 return 1;
310 return 0;
311}
312
313static int get_frame_info(struct mips_frame_info *info)
314{
315 union mips_instruction *ip = info->func;
316 unsigned max_insns = info->func_size / sizeof(union mips_instruction);
317 unsigned i;
318
289 info->pc_offset = -1; 319 info->pc_offset = -1;
290 info->frame_size = 0; 320 info->frame_size = 0;
291 for (i = 0; i < 128; i++, ip++) {
292 /* if jal, jalr, jr, stop. */
293 if (ip->j_format.opcode == jal_op ||
294 (ip->r_format.opcode == spec_op &&
295 (ip->r_format.func == jalr_op ||
296 ip->r_format.func == jr_op)))
297 break;
298 321
299 if (info->func_size && i >= info->func_size / 4) 322 if (!ip)
323 goto err;
324
325 if (max_insns == 0)
326 max_insns = 128U; /* unknown function size */
327 max_insns = min(128U, max_insns);
328
329 for (i = 0; i < max_insns; i++, ip++) {
330
331 if (is_jal_jalr_jr_ins(ip))
300 break; 332 break;
301 if ( 333 if (!info->frame_size) {
302#ifdef CONFIG_32BIT 334 if (is_sp_move_ins(ip))
303 ip->i_format.opcode == addiu_op && 335 info->frame_size = - ip->i_format.simmediate;
304#endif 336 continue;
305#ifdef CONFIG_64BIT
306 ip->i_format.opcode == daddiu_op &&
307#endif
308 ip->i_format.rs == 29 &&
309 ip->i_format.rt == 29) {
310 /* addiu/daddiu sp,sp,-imm */
311 if (info->frame_size)
312 continue;
313 info->frame_size = - ip->i_format.simmediate;
314 } 337 }
315 338 if (info->pc_offset == -1 && is_ra_save_ins(ip)) {
316 if (
317#ifdef CONFIG_32BIT
318 ip->i_format.opcode == sw_op &&
319#endif
320#ifdef CONFIG_64BIT
321 ip->i_format.opcode == sd_op &&
322#endif
323 ip->i_format.rs == 29 &&
324 ip->i_format.rt == 31) {
325 /* sw / sd $ra, offset($sp) */
326 if (info->pc_offset != -1)
327 continue;
328 info->pc_offset = 339 info->pc_offset =
329 ip->i_format.simmediate / sizeof(long); 340 ip->i_format.simmediate / sizeof(long);
341 break;
330 } 342 }
331 } 343 }
332 if (info->pc_offset == -1 || info->frame_size == 0) { 344 if (info->frame_size && info->pc_offset >= 0) /* nested */
333 if (func == schedule) 345 return 0;
334 printk("Can't analyze prologue code at %p\n", func); 346 if (info->pc_offset < 0) /* leaf */
335 info->pc_offset = -1; 347 return 1;
336 info->frame_size = 0; 348 /* prologue seems boggus... */
337 } 349err:
338 350 return -1;
339 return 0;
340} 351}
341 352
353static struct mips_frame_info schedule_mfi __read_mostly;
354
342static int __init frame_info_init(void) 355static int __init frame_info_init(void)
343{ 356{
344 int i; 357 unsigned long size = 0;
345#ifdef CONFIG_KALLSYMS 358#ifdef CONFIG_KALLSYMS
359 unsigned long ofs;
346 char *modname; 360 char *modname;
347 char namebuf[KSYM_NAME_LEN + 1]; 361 char namebuf[KSYM_NAME_LEN + 1];
348 unsigned long start, size, ofs; 362
349 extern char __sched_text_start[], __sched_text_end[]; 363 kallsyms_lookup((unsigned long)schedule, &size, &ofs, &modname, namebuf);
350 extern char __lock_text_start[], __lock_text_end[];
351
352 start = (unsigned long)__sched_text_start;
353 for (i = 0; i < ARRAY_SIZE(mfinfo); i++) {
354 if (start == (unsigned long)schedule)
355 schedule_frame = &mfinfo[i];
356 if (!kallsyms_lookup(start, &size, &ofs, &modname, namebuf))
357 break;
358 mfinfo[i].func = (void *)(start + ofs);
359 mfinfo[i].func_size = size;
360 start += size - ofs;
361 if (start >= (unsigned long)__lock_text_end)
362 break;
363 if (start == (unsigned long)__sched_text_end)
364 start = (unsigned long)__lock_text_start;
365 }
366#else
367 mfinfo[0].func = schedule;
368 schedule_frame = &mfinfo[0];
369#endif 364#endif
370 for (i = 0; i < ARRAY_SIZE(mfinfo) && mfinfo[i].func; i++) 365 schedule_mfi.func = schedule;
371 get_frame_info(&mfinfo[i]); 366 schedule_mfi.func_size = size;
367
368 get_frame_info(&schedule_mfi);
369
370 /*
371 * Without schedule() frame info, result given by
372 * thread_saved_pc() and get_wchan() are not reliable.
373 */
374 if (schedule_mfi.pc_offset < 0)
375 printk("Can't analyze schedule() prologue at %p\n", schedule);
372 376
373 mfinfo_num = i;
374 return 0; 377 return 0;
375} 378}
376 379
@@ -386,54 +389,86 @@ unsigned long thread_saved_pc(struct task_struct *tsk)
386 /* New born processes are a special case */ 389 /* New born processes are a special case */
387 if (t->reg31 == (unsigned long) ret_from_fork) 390 if (t->reg31 == (unsigned long) ret_from_fork)
388 return t->reg31; 391 return t->reg31;
389 392 if (schedule_mfi.pc_offset < 0)
390 if (!schedule_frame || schedule_frame->pc_offset < 0)
391 return 0; 393 return 0;
392 return ((unsigned long *)t->reg29)[schedule_frame->pc_offset]; 394 return ((unsigned long *)t->reg29)[schedule_mfi.pc_offset];
393} 395}
394 396
395/* get_wchan - a maintenance nightmare^W^Wpain in the ass ... */ 397
396unsigned long get_wchan(struct task_struct *p) 398#ifdef CONFIG_KALLSYMS
399/* used by show_backtrace() */
400unsigned long unwind_stack(struct task_struct *task, unsigned long *sp,
401 unsigned long pc, unsigned long ra)
397{ 402{
398 unsigned long stack_page; 403 unsigned long stack_page;
399 unsigned long pc; 404 struct mips_frame_info info;
400#ifdef CONFIG_KALLSYMS 405 char *modname;
401 unsigned long frame; 406 char namebuf[KSYM_NAME_LEN + 1];
402#endif 407 unsigned long size, ofs;
408 int leaf;
403 409
404 if (!p || p == current || p->state == TASK_RUNNING) 410 stack_page = (unsigned long)task_stack_page(task);
411 if (!stack_page)
405 return 0; 412 return 0;
406 413
407 stack_page = (unsigned long)task_stack_page(p); 414 if (!kallsyms_lookup(pc, &size, &ofs, &modname, namebuf))
408 if (!stack_page || !mfinfo_num) 415 return 0;
416 /*
417 * Return ra if an exception occured at the first instruction
418 */
419 if (unlikely(ofs == 0))
420 return ra;
421
422 info.func = (void *)(pc - ofs);
423 info.func_size = ofs; /* analyze from start to ofs */
424 leaf = get_frame_info(&info);
425 if (leaf < 0)
426 return 0;
427
428 if (*sp < stack_page ||
429 *sp + info.frame_size > stack_page + THREAD_SIZE - 32)
409 return 0; 430 return 0;
410 431
411 pc = thread_saved_pc(p); 432 if (leaf)
433 /*
434 * For some extreme cases, get_frame_info() can
435 * consider wrongly a nested function as a leaf
436 * one. In that cases avoid to return always the
437 * same value.
438 */
439 pc = pc != ra ? ra : 0;
440 else
441 pc = ((unsigned long *)(*sp))[info.pc_offset];
442
443 *sp += info.frame_size;
444 return __kernel_text_address(pc) ? pc : 0;
445}
446#endif
447
448/*
449 * get_wchan - a maintenance nightmare^W^Wpain in the ass ...
450 */
451unsigned long get_wchan(struct task_struct *task)
452{
453 unsigned long pc = 0;
412#ifdef CONFIG_KALLSYMS 454#ifdef CONFIG_KALLSYMS
413 if (!in_sched_functions(pc)) 455 unsigned long sp;
414 return pc; 456#endif
415 457
416 frame = p->thread.reg29 + schedule_frame->frame_size; 458 if (!task || task == current || task->state == TASK_RUNNING)
417 do { 459 goto out;
418 int i; 460 if (!task_stack_page(task))
461 goto out;
419 462
420 if (frame < stack_page || frame > stack_page + THREAD_SIZE - 32) 463 pc = thread_saved_pc(task);
421 return 0;
422 464
423 for (i = mfinfo_num - 1; i >= 0; i--) { 465#ifdef CONFIG_KALLSYMS
424 if (pc >= (unsigned long) mfinfo[i].func) 466 sp = task->thread.reg29 + schedule_mfi.frame_size;
425 break;
426 }
427 if (i < 0)
428 break;
429 467
430 pc = ((unsigned long *)frame)[mfinfo[i].pc_offset]; 468 while (in_sched_functions(pc))
431 if (!mfinfo[i].frame_size) 469 pc = unwind_stack(task, &sp, pc, 0);
432 break;
433 frame += mfinfo[i].frame_size;
434 } while (in_sched_functions(pc));
435#endif 470#endif
436 471
472out:
437 return pc; 473 return pc;
438} 474}
439
diff --git a/arch/mips/kernel/scall32-o32.S b/arch/mips/kernel/scall32-o32.S
index ba1bcd83c7d3..e71785102206 100644
--- a/arch/mips/kernel/scall32-o32.S
+++ b/arch/mips/kernel/scall32-o32.S
@@ -662,6 +662,8 @@ einval: li v0, -EINVAL
662 sys sys_tee 4 662 sys sys_tee 4
663 sys sys_vmsplice 4 663 sys sys_vmsplice 4
664 sys sys_move_pages 6 664 sys sys_move_pages 6
665 sys sys_set_robust_list 2
666 sys sys_get_robust_list 3
665 .endm 667 .endm
666 668
667 /* We pre-compute the number of _instruction_ bytes needed to 669 /* We pre-compute the number of _instruction_ bytes needed to
diff --git a/arch/mips/kernel/scall64-64.S b/arch/mips/kernel/scall64-64.S
index 939e172db953..4c22d0b4825d 100644
--- a/arch/mips/kernel/scall64-64.S
+++ b/arch/mips/kernel/scall64-64.S
@@ -466,3 +466,5 @@ sys_call_table:
466 PTR sys_tee /* 5265 */ 466 PTR sys_tee /* 5265 */
467 PTR sys_vmsplice 467 PTR sys_vmsplice
468 PTR sys_move_pages 468 PTR sys_move_pages
469 PTR sys_set_robust_list
470 PTR sys_get_robust_list
diff --git a/arch/mips/kernel/scall64-n32.S b/arch/mips/kernel/scall64-n32.S
index 98abbc5a9f13..f25c2a2f1038 100644
--- a/arch/mips/kernel/scall64-n32.S
+++ b/arch/mips/kernel/scall64-n32.S
@@ -247,7 +247,7 @@ EXPORT(sysn32_call_table)
247 PTR sys_capset 247 PTR sys_capset
248 PTR sys32_rt_sigpending /* 6125 */ 248 PTR sys32_rt_sigpending /* 6125 */
249 PTR compat_sys_rt_sigtimedwait 249 PTR compat_sys_rt_sigtimedwait
250 PTR sys_rt_sigqueueinfo 250 PTR sys32_rt_sigqueueinfo
251 PTR sysn32_rt_sigsuspend 251 PTR sysn32_rt_sigsuspend
252 PTR sys32_sigaltstack 252 PTR sys32_sigaltstack
253 PTR compat_sys_utime /* 6130 */ 253 PTR compat_sys_utime /* 6130 */
@@ -390,5 +390,7 @@ EXPORT(sysn32_call_table)
390 PTR sys_splice 390 PTR sys_splice
391 PTR sys_sync_file_range 391 PTR sys_sync_file_range
392 PTR sys_tee 392 PTR sys_tee
393 PTR sys_vmsplice /* 6271 */ 393 PTR sys_vmsplice /* 6270 */
394 PTR sys_move_pages 394 PTR sys_move_pages
395 PTR compat_sys_set_robust_list
396 PTR compat_sys_get_robust_list
diff --git a/arch/mips/kernel/scall64-o32.S b/arch/mips/kernel/scall64-o32.S
index 505c9ee54009..288ee4ac4dbb 100644
--- a/arch/mips/kernel/scall64-o32.S
+++ b/arch/mips/kernel/scall64-o32.S
@@ -498,7 +498,7 @@ sys_call_table:
498 PTR sys_mknodat /* 4290 */ 498 PTR sys_mknodat /* 4290 */
499 PTR sys_fchownat 499 PTR sys_fchownat
500 PTR compat_sys_futimesat 500 PTR compat_sys_futimesat
501 PTR compat_sys_newfstatat 501 PTR sys_newfstatat
502 PTR sys_unlinkat 502 PTR sys_unlinkat
503 PTR sys_renameat /* 4295 */ 503 PTR sys_renameat /* 4295 */
504 PTR sys_linkat 504 PTR sys_linkat
@@ -514,4 +514,6 @@ sys_call_table:
514 PTR sys_tee 514 PTR sys_tee
515 PTR sys_vmsplice 515 PTR sys_vmsplice
516 PTR compat_sys_move_pages 516 PTR compat_sys_move_pages
517 PTR compat_sys_set_robust_list
518 PTR compat_sys_get_robust_list /* 4310 */
517 .size sys_call_table,.-sys_call_table 519 .size sys_call_table,.-sys_call_table
diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c
index 8c2b596a136f..fdbb508661c5 100644
--- a/arch/mips/kernel/setup.c
+++ b/arch/mips/kernel/setup.c
@@ -10,29 +10,15 @@
10 * Copyright (C) 1999 Silicon Graphics, Inc. 10 * Copyright (C) 1999 Silicon Graphics, Inc.
11 * Copyright (C) 2000 2001, 2002 Maciej W. Rozycki 11 * Copyright (C) 2000 2001, 2002 Maciej W. Rozycki
12 */ 12 */
13#include <linux/errno.h>
14#include <linux/init.h> 13#include <linux/init.h>
15#include <linux/ioport.h> 14#include <linux/ioport.h>
16#include <linux/sched.h>
17#include <linux/kernel.h>
18#include <linux/mm.h>
19#include <linux/module.h> 15#include <linux/module.h>
20#include <linux/stddef.h>
21#include <linux/string.h>
22#include <linux/unistd.h>
23#include <linux/slab.h>
24#include <linux/user.h>
25#include <linux/utsname.h>
26#include <linux/a.out.h>
27#include <linux/screen_info.h> 16#include <linux/screen_info.h>
28#include <linux/bootmem.h> 17#include <linux/bootmem.h>
29#include <linux/initrd.h> 18#include <linux/initrd.h>
30#include <linux/major.h>
31#include <linux/kdev_t.h>
32#include <linux/root_dev.h> 19#include <linux/root_dev.h>
33#include <linux/highmem.h> 20#include <linux/highmem.h>
34#include <linux/console.h> 21#include <linux/console.h>
35#include <linux/mmzone.h>
36#include <linux/pfn.h> 22#include <linux/pfn.h>
37 23
38#include <asm/addrspace.h> 24#include <asm/addrspace.h>
@@ -96,6 +82,12 @@ void __init add_memory_region(phys_t start, phys_t size, long type)
96 int x = boot_mem_map.nr_map; 82 int x = boot_mem_map.nr_map;
97 struct boot_mem_map_entry *prev = boot_mem_map.map + x - 1; 83 struct boot_mem_map_entry *prev = boot_mem_map.map + x - 1;
98 84
85 /* Sanity check */
86 if (start + size < start) {
87 printk("Trying to add an invalid memory region, skipped\n");
88 return;
89 }
90
99 /* 91 /*
100 * Try to merge with previous entry if any. This is far less than 92 * Try to merge with previous entry if any. This is far less than
101 * perfect but is sufficient for most real world cases. 93 * perfect but is sufficient for most real world cases.
@@ -143,167 +135,132 @@ static void __init print_memory_map(void)
143 } 135 }
144} 136}
145 137
146static inline void parse_cmdline_early(void) 138/*
139 * Manage initrd
140 */
141#ifdef CONFIG_BLK_DEV_INITRD
142
143static int __init rd_start_early(char *p)
147{ 144{
148 char c = ' ', *to = command_line, *from = saved_command_line; 145 unsigned long start = memparse(p, &p);
149 unsigned long start_at, mem_size;
150 int len = 0;
151 int usermem = 0;
152 146
153 printk("Determined physical RAM map:\n"); 147#ifdef CONFIG_64BIT
154 print_memory_map(); 148 /* HACK: Guess if the sign extension was forgotten */
149 if (start > 0x0000000080000000 && start < 0x00000000ffffffff)
150 start |= 0xffffffff00000000UL;
151#endif
152 initrd_start = start;
153 initrd_end += start;
155 154
156 for (;;) { 155 return 0;
157 /* 156}
158 * "mem=XXX[kKmM]" defines a memory region from 157early_param("rd_start", rd_start_early);
159 * 0 to <XXX>, overriding the determined size.
160 * "mem=XXX[KkmM]@YYY[KkmM]" defines a memory region from
161 * <YYY> to <YYY>+<XXX>, overriding the determined size.
162 */
163 if (c == ' ' && !memcmp(from, "mem=", 4)) {
164 if (to != command_line)
165 to--;
166 /*
167 * If a user specifies memory size, we
168 * blow away any automatically generated
169 * size.
170 */
171 if (usermem == 0) {
172 boot_mem_map.nr_map = 0;
173 usermem = 1;
174 }
175 mem_size = memparse(from + 4, &from);
176 if (*from == '@')
177 start_at = memparse(from + 1, &from);
178 else
179 start_at = 0;
180 add_memory_region(start_at, mem_size, BOOT_MEM_RAM);
181 }
182 c = *(from++);
183 if (!c)
184 break;
185 if (CL_SIZE <= ++len)
186 break;
187 *(to++) = c;
188 }
189 *to = '\0';
190 158
191 if (usermem) { 159static int __init rd_size_early(char *p)
192 printk("User-defined physical RAM map:\n"); 160{
193 print_memory_map(); 161 initrd_end += memparse(p, &p);
194 } 162
163 return 0;
195} 164}
165early_param("rd_size", rd_size_early);
196 166
197static inline int parse_rd_cmdline(unsigned long* rd_start, unsigned long* rd_end) 167static unsigned long __init init_initrd(void)
198{ 168{
169 unsigned long tmp, end, size;
170 u32 *initrd_header;
171
172 ROOT_DEV = Root_RAM0;
173
199 /* 174 /*
200 * "rd_start=0xNNNNNNNN" defines the memory address of an initrd 175 * Board specific code or command line parser should have
201 * "rd_size=0xNN" it's size 176 * already set up initrd_start and initrd_end. In these cases
177 * perfom sanity checks and use them if all looks good.
202 */ 178 */
203 unsigned long start = 0; 179 size = initrd_end - initrd_start;
204 unsigned long size = 0; 180 if (initrd_end == 0 || size == 0) {
205 unsigned long end; 181 initrd_start = 0;
206 char cmd_line[CL_SIZE]; 182 initrd_end = 0;
207 char *start_str; 183 } else
208 char *size_str; 184 return initrd_end;
209 char *tmp; 185
210 186 end = (unsigned long)&_end;
211 strcpy(cmd_line, command_line); 187 tmp = PAGE_ALIGN(end) - sizeof(u32) * 2;
212 *command_line = 0; 188 if (tmp < end)
213 tmp = cmd_line; 189 tmp += PAGE_SIZE;
214 /* Ignore "rd_start=" strings in other parameters. */ 190
215 start_str = strstr(cmd_line, "rd_start="); 191 initrd_header = (u32 *)tmp;
216 if (start_str && start_str != cmd_line && *(start_str - 1) != ' ') 192 if (initrd_header[0] == 0x494E5244) {
217 start_str = strstr(start_str, " rd_start="); 193 initrd_start = (unsigned long)&initrd_header[2];
218 while (start_str) { 194 initrd_end = initrd_start + initrd_header[1];
219 if (start_str != cmd_line)
220 strncat(command_line, tmp, start_str - tmp);
221 start = memparse(start_str + 9, &start_str);
222 tmp = start_str + 1;
223 start_str = strstr(start_str, " rd_start=");
224 } 195 }
225 if (*tmp) 196 return initrd_end;
226 strcat(command_line, tmp); 197}
227 198
228 strcpy(cmd_line, command_line); 199static void __init finalize_initrd(void)
229 *command_line = 0; 200{
230 tmp = cmd_line; 201 unsigned long size = initrd_end - initrd_start;
231 /* Ignore "rd_size" strings in other parameters. */ 202
232 size_str = strstr(cmd_line, "rd_size="); 203 if (size == 0) {
233 if (size_str && size_str != cmd_line && *(size_str - 1) != ' ') 204 printk(KERN_INFO "Initrd not found or empty");
234 size_str = strstr(size_str, " rd_size="); 205 goto disable;
235 while (size_str) { 206 }
236 if (size_str != cmd_line) 207 if (CPHYSADDR(initrd_end) > PFN_PHYS(max_low_pfn)) {
237 strncat(command_line, tmp, size_str - tmp); 208 printk("Initrd extends beyond end of memory");
238 size = memparse(size_str + 8, &size_str); 209 goto disable;
239 tmp = size_str + 1;
240 size_str = strstr(size_str, " rd_size=");
241 } 210 }
242 if (*tmp)
243 strcat(command_line, tmp);
244 211
245#ifdef CONFIG_64BIT 212 reserve_bootmem(CPHYSADDR(initrd_start), size);
246 /* HACK: Guess if the sign extension was forgotten */ 213 initrd_below_start_ok = 1;
247 if (start > 0x0000000080000000 && start < 0x00000000ffffffff) 214
248 start |= 0xffffffff00000000UL; 215 printk(KERN_INFO "Initial ramdisk at: 0x%lx (%lu bytes)\n",
216 initrd_start, size);
217 return;
218disable:
219 printk(" - disabling initrd\n");
220 initrd_start = 0;
221 initrd_end = 0;
222}
223
224#else /* !CONFIG_BLK_DEV_INITRD */
225
226#define init_initrd() 0
227#define finalize_initrd() do {} while (0)
228
249#endif 229#endif
250 230
251 end = start + size; 231/*
252 if (start && end) { 232 * Initialize the bootmem allocator. It also setup initrd related data
253 *rd_start = start; 233 * if needed.
254 *rd_end = end; 234 */
255 return 1; 235#ifdef CONFIG_SGI_IP27
256 } 236
257 return 0; 237static void __init bootmem_init(void)
238{
239 init_initrd();
240 finalize_initrd();
258} 241}
259 242
260#define MAXMEM HIGHMEM_START 243#else /* !CONFIG_SGI_IP27 */
261#define MAXMEM_PFN PFN_DOWN(MAXMEM)
262 244
263static inline void bootmem_init(void) 245static void __init bootmem_init(void)
264{ 246{
265 unsigned long start_pfn; 247 unsigned long reserved_end;
266 unsigned long reserved_end = (unsigned long)&_end; 248 unsigned long highest = 0;
267#ifndef CONFIG_SGI_IP27 249 unsigned long mapstart = -1UL;
268 unsigned long first_usable_pfn;
269 unsigned long bootmap_size; 250 unsigned long bootmap_size;
270 int i; 251 int i;
271#endif
272#ifdef CONFIG_BLK_DEV_INITRD
273 int initrd_reserve_bootmem = 0;
274
275 /* Board specific code should have set up initrd_start and initrd_end */
276 ROOT_DEV = Root_RAM0;
277 if (parse_rd_cmdline(&initrd_start, &initrd_end)) {
278 reserved_end = max(reserved_end, initrd_end);
279 initrd_reserve_bootmem = 1;
280 } else {
281 unsigned long tmp;
282 u32 *initrd_header;
283
284 tmp = ((reserved_end + PAGE_SIZE-1) & PAGE_MASK) - sizeof(u32) * 2;
285 if (tmp < reserved_end)
286 tmp += PAGE_SIZE;
287 initrd_header = (u32 *)tmp;
288 if (initrd_header[0] == 0x494E5244) {
289 initrd_start = (unsigned long)&initrd_header[2];
290 initrd_end = initrd_start + initrd_header[1];
291 reserved_end = max(reserved_end, initrd_end);
292 initrd_reserve_bootmem = 1;
293 }
294 }
295#endif /* CONFIG_BLK_DEV_INITRD */
296 252
297 /* 253 /*
298 * Partially used pages are not usable - thus 254 * Init any data related to initrd. It's a nop if INITRD is
299 * we are rounding upwards. 255 * not selected. Once that done we can determine the low bound
256 * of usable memory.
300 */ 257 */
301 start_pfn = PFN_UP(CPHYSADDR(reserved_end)); 258 reserved_end = init_initrd();
259 reserved_end = PFN_UP(CPHYSADDR(max(reserved_end, (unsigned long)&_end)));
302 260
303#ifndef CONFIG_SGI_IP27 261 /*
304 /* Find the highest page frame number we have available. */ 262 * Find the highest page frame number we have available.
305 max_pfn = 0; 263 */
306 first_usable_pfn = -1UL;
307 for (i = 0; i < boot_mem_map.nr_map; i++) { 264 for (i = 0; i < boot_mem_map.nr_map; i++) {
308 unsigned long start, end; 265 unsigned long start, end;
309 266
@@ -312,56 +269,38 @@ static inline void bootmem_init(void)
312 269
313 start = PFN_UP(boot_mem_map.map[i].addr); 270 start = PFN_UP(boot_mem_map.map[i].addr);
314 end = PFN_DOWN(boot_mem_map.map[i].addr 271 end = PFN_DOWN(boot_mem_map.map[i].addr
315 + boot_mem_map.map[i].size); 272 + boot_mem_map.map[i].size);
316 273
317 if (start >= end) 274 if (end > highest)
275 highest = end;
276 if (end <= reserved_end)
318 continue; 277 continue;
319 if (end > max_pfn) 278 if (start >= mapstart)
320 max_pfn = end; 279 continue;
321 if (start < first_usable_pfn) { 280 mapstart = max(reserved_end, start);
322 if (start > start_pfn) {
323 first_usable_pfn = start;
324 } else if (end > start_pfn) {
325 first_usable_pfn = start_pfn;
326 }
327 }
328 } 281 }
329 282
330 /* 283 /*
331 * Determine low and high memory ranges 284 * Determine low and high memory ranges
332 */ 285 */
333 max_low_pfn = max_pfn; 286 if (highest > PFN_DOWN(HIGHMEM_START)) {
334 if (max_low_pfn > MAXMEM_PFN) { 287#ifdef CONFIG_HIGHMEM
335 max_low_pfn = MAXMEM_PFN; 288 highstart_pfn = PFN_DOWN(HIGHMEM_START);
336#ifndef CONFIG_HIGHMEM 289 highend_pfn = highest;
337 /* Maximum memory usable is what is directly addressable */
338 printk(KERN_WARNING "Warning only %ldMB will be used.\n",
339 MAXMEM >> 20);
340 printk(KERN_WARNING "Use a HIGHMEM enabled kernel.\n");
341#endif 290#endif
291 highest = PFN_DOWN(HIGHMEM_START);
342 } 292 }
343 293
344#ifdef CONFIG_HIGHMEM
345 /* 294 /*
346 * Crude, we really should make a better attempt at detecting 295 * Initialize the boot-time allocator with low memory only.
347 * highstart_pfn
348 */ 296 */
349 highstart_pfn = highend_pfn = max_pfn; 297 bootmap_size = init_bootmem(mapstart, highest);
350 if (max_pfn > MAXMEM_PFN) {
351 highstart_pfn = MAXMEM_PFN;
352 printk(KERN_NOTICE "%ldMB HIGHMEM available.\n",
353 (highend_pfn - highstart_pfn) >> (20 - PAGE_SHIFT));
354 }
355#endif
356
357 /* Initialize the boot-time allocator with low memory only. */
358 bootmap_size = init_bootmem(first_usable_pfn, max_low_pfn);
359 298
360 /* 299 /*
361 * Register fully available low RAM pages with the bootmem allocator. 300 * Register fully available low RAM pages with the bootmem allocator.
362 */ 301 */
363 for (i = 0; i < boot_mem_map.nr_map; i++) { 302 for (i = 0; i < boot_mem_map.nr_map; i++) {
364 unsigned long curr_pfn, last_pfn, size; 303 unsigned long start, end, size;
365 304
366 /* 305 /*
367 * Reserve usable memory. 306 * Reserve usable memory.
@@ -369,85 +308,50 @@ static inline void bootmem_init(void)
369 if (boot_mem_map.map[i].type != BOOT_MEM_RAM) 308 if (boot_mem_map.map[i].type != BOOT_MEM_RAM)
370 continue; 309 continue;
371 310
372 /* 311 start = PFN_UP(boot_mem_map.map[i].addr);
373 * We are rounding up the start address of usable memory: 312 end = PFN_DOWN(boot_mem_map.map[i].addr
374 */
375 curr_pfn = PFN_UP(boot_mem_map.map[i].addr);
376 if (curr_pfn >= max_low_pfn)
377 continue;
378 if (curr_pfn < start_pfn)
379 curr_pfn = start_pfn;
380
381 /*
382 * ... and at the end of the usable range downwards:
383 */
384 last_pfn = PFN_DOWN(boot_mem_map.map[i].addr
385 + boot_mem_map.map[i].size); 313 + boot_mem_map.map[i].size);
386
387 if (last_pfn > max_low_pfn)
388 last_pfn = max_low_pfn;
389
390 /* 314 /*
391 * Only register lowmem part of lowmem segment with bootmem. 315 * We are rounding up the start address of usable memory
316 * and at the end of the usable range downwards.
392 */ 317 */
393 size = last_pfn - curr_pfn; 318 if (start >= max_low_pfn)
394 if (curr_pfn > PFN_DOWN(HIGHMEM_START))
395 continue;
396 if (curr_pfn + size - 1 > PFN_DOWN(HIGHMEM_START))
397 size = PFN_DOWN(HIGHMEM_START) - curr_pfn;
398 if (!size)
399 continue; 319 continue;
320 if (start < reserved_end)
321 start = reserved_end;
322 if (end > max_low_pfn)
323 end = max_low_pfn;
400 324
401 /* 325 /*
402 * ... finally, did all the rounding and playing 326 * ... finally, is the area going away?
403 * around just make the area go away?
404 */ 327 */
405 if (last_pfn <= curr_pfn) 328 if (end <= start)
406 continue; 329 continue;
330 size = end - start;
407 331
408 /* Register lowmem ranges */ 332 /* Register lowmem ranges */
409 free_bootmem(PFN_PHYS(curr_pfn), PFN_PHYS(size)); 333 free_bootmem(PFN_PHYS(start), size << PAGE_SHIFT);
410 memory_present(0, curr_pfn, curr_pfn + size - 1); 334 memory_present(0, start, end);
411 } 335 }
412 336
413 /* Reserve the bootmap memory. */ 337 /*
414 reserve_bootmem(PFN_PHYS(first_usable_pfn), bootmap_size); 338 * Reserve the bootmap memory.
415#endif /* CONFIG_SGI_IP27 */ 339 */
416 340 reserve_bootmem(PFN_PHYS(mapstart), bootmap_size);
417#ifdef CONFIG_BLK_DEV_INITRD
418 initrd_below_start_ok = 1;
419 if (initrd_start) {
420 unsigned long initrd_size = ((unsigned char *)initrd_end) -
421 ((unsigned char *)initrd_start);
422 const int width = sizeof(long) * 2;
423
424 printk("Initial ramdisk at: 0x%p (%lu bytes)\n",
425 (void *)initrd_start, initrd_size);
426
427 if (CPHYSADDR(initrd_end) > PFN_PHYS(max_low_pfn)) {
428 printk("initrd extends beyond end of memory "
429 "(0x%0*Lx > 0x%0*Lx)\ndisabling initrd\n",
430 width,
431 (unsigned long long) CPHYSADDR(initrd_end),
432 width,
433 (unsigned long long) PFN_PHYS(max_low_pfn));
434 initrd_start = initrd_end = 0;
435 initrd_reserve_bootmem = 0;
436 }
437 341
438 if (initrd_reserve_bootmem) 342 /*
439 reserve_bootmem(CPHYSADDR(initrd_start), initrd_size); 343 * Reserve initrd memory if needed.
440 } 344 */
441#endif /* CONFIG_BLK_DEV_INITRD */ 345 finalize_initrd();
442} 346}
443 347
348#endif /* CONFIG_SGI_IP27 */
349
444/* 350/*
445 * arch_mem_init - initialize memory managment subsystem 351 * arch_mem_init - initialize memory managment subsystem
446 * 352 *
447 * o plat_mem_setup() detects the memory configuration and will record detected 353 * o plat_mem_setup() detects the memory configuration and will record detected
448 * memory areas using add_memory_region. 354 * memory areas using add_memory_region.
449 * o parse_cmdline_early() parses the command line for mem= options which,
450 * iff detected, will override the results of the automatic detection.
451 * 355 *
452 * At this stage the memory configuration of the system is known to the 356 * At this stage the memory configuration of the system is known to the
453 * kernel but generic memory managment system is still entirely uninitialized. 357 * kernel but generic memory managment system is still entirely uninitialized.
@@ -465,25 +369,59 @@ static inline void bootmem_init(void)
465 * initialization hook for anything else was introduced. 369 * initialization hook for anything else was introduced.
466 */ 370 */
467 371
468extern void plat_mem_setup(void); 372static int usermem __initdata = 0;
373
374static int __init early_parse_mem(char *p)
375{
376 unsigned long start, size;
377
378 /*
379 * If a user specifies memory size, we
380 * blow away any automatically generated
381 * size.
382 */
383 if (usermem == 0) {
384 boot_mem_map.nr_map = 0;
385 usermem = 1;
386 }
387 start = 0;
388 size = memparse(p, &p);
389 if (*p == '@')
390 start = memparse(p + 1, &p);
391
392 add_memory_region(start, size, BOOT_MEM_RAM);
393 return 0;
394}
395early_param("mem", early_parse_mem);
469 396
470static void __init arch_mem_init(char **cmdline_p) 397static void __init arch_mem_init(char **cmdline_p)
471{ 398{
399 extern void plat_mem_setup(void);
400
472 /* call board setup routine */ 401 /* call board setup routine */
473 plat_mem_setup(); 402 plat_mem_setup();
474 403
404 printk("Determined physical RAM map:\n");
405 print_memory_map();
406
475 strlcpy(command_line, arcs_cmdline, sizeof(command_line)); 407 strlcpy(command_line, arcs_cmdline, sizeof(command_line));
476 strlcpy(saved_command_line, command_line, COMMAND_LINE_SIZE); 408 strlcpy(saved_command_line, command_line, COMMAND_LINE_SIZE);
477 409
478 *cmdline_p = command_line; 410 *cmdline_p = command_line;
479 411
480 parse_cmdline_early(); 412 parse_early_param();
413
414 if (usermem) {
415 printk("User-defined physical RAM map:\n");
416 print_memory_map();
417 }
418
481 bootmem_init(); 419 bootmem_init();
482 sparse_init(); 420 sparse_init();
483 paging_init(); 421 paging_init();
484} 422}
485 423
486static inline void resource_init(void) 424static void __init resource_init(void)
487{ 425{
488 int i; 426 int i;
489 427
@@ -504,10 +442,10 @@ static inline void resource_init(void)
504 442
505 start = boot_mem_map.map[i].addr; 443 start = boot_mem_map.map[i].addr;
506 end = boot_mem_map.map[i].addr + boot_mem_map.map[i].size - 1; 444 end = boot_mem_map.map[i].addr + boot_mem_map.map[i].size - 1;
507 if (start >= MAXMEM) 445 if (start >= HIGHMEM_START)
508 continue; 446 continue;
509 if (end >= MAXMEM) 447 if (end >= HIGHMEM_START)
510 end = MAXMEM - 1; 448 end = HIGHMEM_START - 1;
511 449
512 res = alloc_bootmem(sizeof(struct resource)); 450 res = alloc_bootmem(sizeof(struct resource));
513 switch (boot_mem_map.map[i].type) { 451 switch (boot_mem_map.map[i].type) {
@@ -536,9 +474,6 @@ static inline void resource_init(void)
536 } 474 }
537} 475}
538 476
539#undef MAXMEM
540#undef MAXMEM_PFN
541
542void __init setup_arch(char **cmdline_p) 477void __init setup_arch(char **cmdline_p)
543{ 478{
544 cpu_probe(); 479 cpu_probe();
diff --git a/arch/mips/kernel/signal.c b/arch/mips/kernel/signal.c
index 6b4d9be31615..b9d358e05214 100644
--- a/arch/mips/kernel/signal.c
+++ b/arch/mips/kernel/signal.c
@@ -424,15 +424,11 @@ void do_signal(struct pt_regs *regs)
424 if (!user_mode(regs)) 424 if (!user_mode(regs))
425 return; 425 return;
426 426
427 if (try_to_freeze())
428 goto no_signal;
429
430 if (test_thread_flag(TIF_RESTORE_SIGMASK)) 427 if (test_thread_flag(TIF_RESTORE_SIGMASK))
431 oldset = &current->saved_sigmask; 428 oldset = &current->saved_sigmask;
432 else 429 else
433 oldset = &current->blocked; 430 oldset = &current->blocked;
434 431
435
436 signr = get_signal_to_deliver(&info, &ka, regs, NULL); 432 signr = get_signal_to_deliver(&info, &ka, regs, NULL);
437 if (signr > 0) { 433 if (signr > 0) {
438 /* Whee! Actually deliver the signal. */ 434 /* Whee! Actually deliver the signal. */
@@ -446,9 +442,10 @@ void do_signal(struct pt_regs *regs)
446 if (test_thread_flag(TIF_RESTORE_SIGMASK)) 442 if (test_thread_flag(TIF_RESTORE_SIGMASK))
447 clear_thread_flag(TIF_RESTORE_SIGMASK); 443 clear_thread_flag(TIF_RESTORE_SIGMASK);
448 } 444 }
445
446 return;
449 } 447 }
450 448
451no_signal:
452 /* 449 /*
453 * Who's code doesn't conform to the restartable syscall convention 450 * Who's code doesn't conform to the restartable syscall convention
454 * dies here!!! The li instruction, a single machine instruction, 451 * dies here!!! The li instruction, a single machine instruction,
@@ -466,6 +463,7 @@ no_signal:
466 regs->regs[7] = regs->regs[26]; 463 regs->regs[7] = regs->regs[26];
467 regs->cp0_epc -= 4; 464 regs->cp0_epc -= 4;
468 } 465 }
466 regs->regs[0] = 0; /* Don't deal with this again. */
469 } 467 }
470 468
471 /* 469 /*
diff --git a/arch/mips/kernel/signal32.c b/arch/mips/kernel/signal32.c
index f32a22997c3d..c86a5ddff050 100644
--- a/arch/mips/kernel/signal32.c
+++ b/arch/mips/kernel/signal32.c
@@ -815,9 +815,6 @@ void do_signal32(struct pt_regs *regs)
815 if (!user_mode(regs)) 815 if (!user_mode(regs))
816 return; 816 return;
817 817
818 if (try_to_freeze())
819 goto no_signal;
820
821 if (test_thread_flag(TIF_RESTORE_SIGMASK)) 818 if (test_thread_flag(TIF_RESTORE_SIGMASK))
822 oldset = &current->saved_sigmask; 819 oldset = &current->saved_sigmask;
823 else 820 else
@@ -836,9 +833,10 @@ void do_signal32(struct pt_regs *regs)
836 if (test_thread_flag(TIF_RESTORE_SIGMASK)) 833 if (test_thread_flag(TIF_RESTORE_SIGMASK))
837 clear_thread_flag(TIF_RESTORE_SIGMASK); 834 clear_thread_flag(TIF_RESTORE_SIGMASK);
838 } 835 }
836
837 return;
839 } 838 }
840 839
841no_signal:
842 /* 840 /*
843 * Who's code doesn't conform to the restartable syscall convention 841 * Who's code doesn't conform to the restartable syscall convention
844 * dies here!!! The li instruction, a single machine instruction, 842 * dies here!!! The li instruction, a single machine instruction,
@@ -856,6 +854,7 @@ no_signal:
856 regs->regs[7] = regs->regs[26]; 854 regs->regs[7] = regs->regs[26];
857 regs->cp0_epc -= 4; 855 regs->cp0_epc -= 4;
858 } 856 }
857 regs->regs[0] = 0; /* Don't deal with this again. */
859 } 858 }
860 859
861 /* 860 /*
diff --git a/arch/mips/kernel/smp-mt.c b/arch/mips/kernel/smp-mt.c
index 93429a4d3012..766253c44f3f 100644
--- a/arch/mips/kernel/smp-mt.c
+++ b/arch/mips/kernel/smp-mt.c
@@ -203,7 +203,7 @@ void plat_smp_setup(void)
203 write_vpe_c0_config( read_c0_config()); 203 write_vpe_c0_config( read_c0_config());
204 204
205 /* make sure there are no software interrupts pending */ 205 /* make sure there are no software interrupts pending */
206 write_vpe_c0_cause(read_vpe_c0_cause() & ~(C_SW1|C_SW0)); 206 write_vpe_c0_cause(0);
207 207
208 /* Propagate Config7 */ 208 /* Propagate Config7 */
209 write_vpe_c0_config7(read_c0_config7()); 209 write_vpe_c0_config7(read_c0_config7());
diff --git a/arch/mips/kernel/smtc-asm.S b/arch/mips/kernel/smtc-asm.S
index 4cc3dea36612..76cb31d57482 100644
--- a/arch/mips/kernel/smtc-asm.S
+++ b/arch/mips/kernel/smtc-asm.S
@@ -8,7 +8,7 @@
8#include <asm/regdef.h> 8#include <asm/regdef.h>
9#include <asm/asmmacro.h> 9#include <asm/asmmacro.h>
10#include <asm/stackframe.h> 10#include <asm/stackframe.h>
11#include <asm/stackframe.h> 11#include <asm/irqflags.h>
12 12
13/* 13/*
14 * "Software Interrupt" linkage. 14 * "Software Interrupt" linkage.
diff --git a/arch/mips/kernel/syscall.c b/arch/mips/kernel/syscall.c
index 0721314db657..9951240cc3fd 100644
--- a/arch/mips/kernel/syscall.c
+++ b/arch/mips/kernel/syscall.c
@@ -263,7 +263,7 @@ asmlinkage int sys_olduname(struct oldold_utsname __user * name)
263 return error; 263 return error;
264} 264}
265 265
266void sys_set_thread_area(unsigned long addr) 266asmlinkage int sys_set_thread_area(unsigned long addr)
267{ 267{
268 struct thread_info *ti = task_thread_info(current); 268 struct thread_info *ti = task_thread_info(current);
269 269
@@ -271,6 +271,8 @@ void sys_set_thread_area(unsigned long addr)
271 271
272 /* If some future MIPS implementation has this register in hardware, 272 /* If some future MIPS implementation has this register in hardware,
273 * we will need to update it here (and in context switches). */ 273 * we will need to update it here (and in context switches). */
274
275 return 0;
274} 276}
275 277
276asmlinkage int _sys_sysmips(int cmd, long arg1, int arg2, int arg3) 278asmlinkage int _sys_sysmips(int cmd, long arg1, int arg2, int arg3)
diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c
index 954a198494ef..e51d8fd9a152 100644
--- a/arch/mips/kernel/traps.c
+++ b/arch/mips/kernel/traps.c
@@ -20,6 +20,7 @@
20#include <linux/spinlock.h> 20#include <linux/spinlock.h>
21#include <linux/kallsyms.h> 21#include <linux/kallsyms.h>
22#include <linux/bootmem.h> 22#include <linux/bootmem.h>
23#include <linux/interrupt.h>
23 24
24#include <asm/bootinfo.h> 25#include <asm/bootinfo.h>
25#include <asm/branch.h> 26#include <asm/branch.h>
@@ -72,28 +73,68 @@ void (*board_nmi_handler_setup)(void);
72void (*board_ejtag_handler_setup)(void); 73void (*board_ejtag_handler_setup)(void);
73void (*board_bind_eic_interrupt)(int irq, int regset); 74void (*board_bind_eic_interrupt)(int irq, int regset);
74 75
75/* 76
76 * These constant is for searching for possible module text segments. 77static void show_raw_backtrace(unsigned long reg29)
77 * MODULE_RANGE is a guess of how much space is likely to be vmalloced. 78{
78 */ 79 unsigned long *sp = (unsigned long *)reg29;
79#define MODULE_RANGE (8*1024*1024) 80 unsigned long addr;
81
82 printk("Call Trace:");
83#ifdef CONFIG_KALLSYMS
84 printk("\n");
85#endif
86 while (!kstack_end(sp)) {
87 addr = *sp++;
88 if (__kernel_text_address(addr))
89 print_ip_sym(addr);
90 }
91 printk("\n");
92}
93
94#ifdef CONFIG_KALLSYMS
95static int raw_show_trace;
96static int __init set_raw_show_trace(char *str)
97{
98 raw_show_trace = 1;
99 return 1;
100}
101__setup("raw_show_trace", set_raw_show_trace);
102
103extern unsigned long unwind_stack(struct task_struct *task, unsigned long *sp,
104 unsigned long pc, unsigned long ra);
105
106static void show_backtrace(struct task_struct *task, struct pt_regs *regs)
107{
108 unsigned long sp = regs->regs[29];
109 unsigned long ra = regs->regs[31];
110 unsigned long pc = regs->cp0_epc;
111
112 if (raw_show_trace || !__kernel_text_address(pc)) {
113 show_raw_backtrace(sp);
114 return;
115 }
116 printk("Call Trace:\n");
117 do {
118 print_ip_sym(pc);
119 pc = unwind_stack(task, &sp, pc, ra);
120 ra = 0;
121 } while (pc);
122 printk("\n");
123}
124#else
125#define show_backtrace(task, r) show_raw_backtrace((r)->regs[29]);
126#endif
80 127
81/* 128/*
82 * This routine abuses get_user()/put_user() to reference pointers 129 * This routine abuses get_user()/put_user() to reference pointers
83 * with at least a bit of error checking ... 130 * with at least a bit of error checking ...
84 */ 131 */
85void show_stack(struct task_struct *task, unsigned long *sp) 132static void show_stacktrace(struct task_struct *task, struct pt_regs *regs)
86{ 133{
87 const int field = 2 * sizeof(unsigned long); 134 const int field = 2 * sizeof(unsigned long);
88 long stackdata; 135 long stackdata;
89 int i; 136 int i;
90 137 unsigned long *sp = (unsigned long *)regs->regs[29];
91 if (!sp) {
92 if (task && task != current)
93 sp = (unsigned long *) task->thread.reg29;
94 else
95 sp = (unsigned long *) &sp;
96 }
97 138
98 printk("Stack :"); 139 printk("Stack :");
99 i = 0; 140 i = 0;
@@ -114,32 +155,48 @@ void show_stack(struct task_struct *task, unsigned long *sp)
114 i++; 155 i++;
115 } 156 }
116 printk("\n"); 157 printk("\n");
158 show_backtrace(task, regs);
117} 159}
118 160
119void show_trace(struct task_struct *task, unsigned long *stack) 161static __always_inline void prepare_frametrace(struct pt_regs *regs)
120{ 162{
121 const int field = 2 * sizeof(unsigned long); 163 __asm__ __volatile__(
122 unsigned long addr; 164 ".set push\n\t"
123 165 ".set noat\n\t"
124 if (!stack) { 166#ifdef CONFIG_64BIT
125 if (task && task != current) 167 "1: dla $1, 1b\n\t"
126 stack = (unsigned long *) task->thread.reg29; 168 "sd $1, %0\n\t"
127 else 169 "sd $29, %1\n\t"
128 stack = (unsigned long *) &stack; 170 "sd $31, %2\n\t"
129 } 171#else
130 172 "1: la $1, 1b\n\t"
131 printk("Call Trace:"); 173 "sw $1, %0\n\t"
132#ifdef CONFIG_KALLSYMS 174 "sw $29, %1\n\t"
133 printk("\n"); 175 "sw $31, %2\n\t"
134#endif 176#endif
135 while (!kstack_end(stack)) { 177 ".set pop\n\t"
136 addr = *stack++; 178 : "=m" (regs->cp0_epc),
137 if (__kernel_text_address(addr)) { 179 "=m" (regs->regs[29]), "=m" (regs->regs[31])
138 printk(" [<%0*lx>] ", field, addr); 180 : : "memory");
139 print_symbol("%s\n", addr); 181}
182
183void show_stack(struct task_struct *task, unsigned long *sp)
184{
185 struct pt_regs regs;
186 if (sp) {
187 regs.regs[29] = (unsigned long)sp;
188 regs.regs[31] = 0;
189 regs.cp0_epc = 0;
190 } else {
191 if (task && task != current) {
192 regs.regs[29] = task->thread.reg29;
193 regs.regs[31] = 0;
194 regs.cp0_epc = task->thread.reg31;
195 } else {
196 prepare_frametrace(&regs);
140 } 197 }
141 } 198 }
142 printk("\n"); 199 show_stacktrace(task, &regs);
143} 200}
144 201
145/* 202/*
@@ -147,9 +204,15 @@ void show_trace(struct task_struct *task, unsigned long *stack)
147 */ 204 */
148void dump_stack(void) 205void dump_stack(void)
149{ 206{
150 unsigned long stack; 207 struct pt_regs regs;
151 208
152 show_trace(current, &stack); 209 /*
210 * Remove any garbage that may be in regs (specially func
211 * addresses) to avoid show_raw_backtrace() to report them
212 */
213 memset(&regs, 0, sizeof(regs));
214 prepare_frametrace(&regs);
215 show_backtrace(current, &regs);
153} 216}
154 217
155EXPORT_SYMBOL(dump_stack); 218EXPORT_SYMBOL(dump_stack);
@@ -268,8 +331,7 @@ void show_registers(struct pt_regs *regs)
268 print_modules(); 331 print_modules();
269 printk("Process %s (pid: %d, threadinfo=%p, task=%p)\n", 332 printk("Process %s (pid: %d, threadinfo=%p, task=%p)\n",
270 current->comm, current->pid, current_thread_info(), current); 333 current->comm, current->pid, current_thread_info(), current);
271 show_stack(current, (long *) regs->regs[29]); 334 show_stacktrace(current, regs);
272 show_trace(current, (long *) regs->regs[29]);
273 show_code((unsigned int *) regs->cp0_epc); 335 show_code((unsigned int *) regs->cp0_epc);
274 printk("\n"); 336 printk("\n");
275} 337}
@@ -292,6 +354,16 @@ NORET_TYPE void ATTRIB_NORET die(const char * str, struct pt_regs * regs)
292 printk("%s[#%d]:\n", str, ++die_counter); 354 printk("%s[#%d]:\n", str, ++die_counter);
293 show_registers(regs); 355 show_registers(regs);
294 spin_unlock_irq(&die_lock); 356 spin_unlock_irq(&die_lock);
357
358 if (in_interrupt())
359 panic("Fatal exception in interrupt");
360
361 if (panic_on_oops) {
362 printk(KERN_EMERG "Fatal exception: panic in 5 seconds\n");
363 ssleep(5);
364 panic("Fatal exception");
365 }
366
295 do_exit(SIGSEGV); 367 do_exit(SIGSEGV);
296} 368}
297 369
diff --git a/arch/mips/kernel/vpe.c b/arch/mips/kernel/vpe.c
index 9ee0ec2cd067..51ddd2166898 100644
--- a/arch/mips/kernel/vpe.c
+++ b/arch/mips/kernel/vpe.c
@@ -768,10 +768,16 @@ int vpe_run(struct vpe * v)
768 */ 768 */
769 write_tc_c0_tcbind((read_tc_c0_tcbind() & ~TCBIND_CURVPE) | v->minor); 769 write_tc_c0_tcbind((read_tc_c0_tcbind() & ~TCBIND_CURVPE) | v->minor);
770 770
771 write_vpe_c0_vpeconf0(read_vpe_c0_vpeconf0() & ~(VPECONF0_VPA));
772
773 back_to_back_c0_hazard();
774
771 /* Set up the XTC bit in vpeconf0 to point at our tc */ 775 /* Set up the XTC bit in vpeconf0 to point at our tc */
772 write_vpe_c0_vpeconf0( (read_vpe_c0_vpeconf0() & ~(VPECONF0_XTC)) 776 write_vpe_c0_vpeconf0( (read_vpe_c0_vpeconf0() & ~(VPECONF0_XTC))
773 | (t->index << VPECONF0_XTC_SHIFT)); 777 | (t->index << VPECONF0_XTC_SHIFT));
774 778
779 back_to_back_c0_hazard();
780
775 /* enable this VPE */ 781 /* enable this VPE */
776 write_vpe_c0_vpeconf0(read_vpe_c0_vpeconf0() | VPECONF0_VPA); 782 write_vpe_c0_vpeconf0(read_vpe_c0_vpeconf0() | VPECONF0_VPA);
777 783
generated by cgit v1.2.2 (git 2.25.0) at 2025-11-10 12:29:03 -0500