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Bryan Wu1394f032007-05-06 14:50:22 -07001/*
Robin Getz96f10502009-09-24 14:11:24 +00002 * Blackfin architecture-dependent process handling
Bryan Wu1394f032007-05-06 14:50:22 -07003 *
Robin Getz96f10502009-09-24 14:11:24 +00004 * Copyright 2004-2009 Analog Devices Inc.
Bryan Wu1394f032007-05-06 14:50:22 -07005 *
Robin Getz96f10502009-09-24 14:11:24 +00006 * Licensed under the GPL-2 or later
Bryan Wu1394f032007-05-06 14:50:22 -07007 */
8
9#include <linux/module.h>
Bryan Wu1394f032007-05-06 14:50:22 -070010#include <linux/unistd.h>
11#include <linux/user.h>
Mike Frysinger1f83b8f2007-07-12 22:58:21 +080012#include <linux/uaccess.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090013#include <linux/slab.h>
Vitja Makarov8b5f79f2008-02-29 12:24:23 +080014#include <linux/sched.h>
15#include <linux/tick.h>
Bryan Wud31c5ab2007-08-10 13:00:42 -070016#include <linux/fs.h>
17#include <linux/err.h>
Bryan Wu1394f032007-05-06 14:50:22 -070018
19#include <asm/blackfin.h>
Bernd Schmidt7adfb582007-06-21 11:34:16 +080020#include <asm/fixed_code.h>
Graf Yangdbc895f2009-01-07 23:14:39 +080021#include <asm/mem_map.h>
Bryan Wu1394f032007-05-06 14:50:22 -070022
Bryan Wu1394f032007-05-06 14:50:22 -070023asmlinkage void ret_from_fork(void);
24
25/* Points to the SDRAM backup memory for the stack that is currently in
26 * L1 scratchpad memory.
27 */
28void *current_l1_stack_save;
29
30/* The number of tasks currently using a L1 stack area. The SRAM is
31 * allocated/deallocated whenever this changes from/to zero.
32 */
33int nr_l1stack_tasks;
34
35/* Start and length of the area in L1 scratchpad memory which we've allocated
36 * for process stacks.
37 */
38void *l1_stack_base;
39unsigned long l1_stack_len;
40
41/*
42 * Powermanagement idle function, if any..
43 */
44void (*pm_idle)(void) = NULL;
45EXPORT_SYMBOL(pm_idle);
46
47void (*pm_power_off)(void) = NULL;
48EXPORT_SYMBOL(pm_power_off);
49
50/*
Bryan Wu1394f032007-05-06 14:50:22 -070051 * The idle loop on BFIN
52 */
53#ifdef CONFIG_IDLE_L1
Vitja Makarov8b5f79f2008-02-29 12:24:23 +080054static void default_idle(void)__attribute__((l1_text));
Bryan Wu1394f032007-05-06 14:50:22 -070055void cpu_idle(void)__attribute__((l1_text));
56#endif
57
Vitja Makarov8b5f79f2008-02-29 12:24:23 +080058/*
59 * This is our default idle handler. We need to disable
60 * interrupts here to ensure we don't miss a wakeup call.
61 */
62static void default_idle(void)
Bryan Wu1394f032007-05-06 14:50:22 -070063{
Yi Li6a01f232009-01-07 23:14:39 +080064#ifdef CONFIG_IPIPE
65 ipipe_suspend_domain();
66#endif
David Howells3b139cd2010-10-07 14:08:52 +010067 hard_local_irq_disable();
Vitja Makarov8b5f79f2008-02-29 12:24:23 +080068 if (!need_resched())
69 idle_with_irq_disabled();
70
David Howells3b139cd2010-10-07 14:08:52 +010071 hard_local_irq_enable();
Bryan Wu1394f032007-05-06 14:50:22 -070072}
73
Bryan Wu1394f032007-05-06 14:50:22 -070074/*
Vitja Makarov8b5f79f2008-02-29 12:24:23 +080075 * The idle thread. We try to conserve power, while trying to keep
76 * overall latency low. The architecture specific idle is passed
77 * a value to indicate the level of "idleness" of the system.
Bryan Wu1394f032007-05-06 14:50:22 -070078 */
79void cpu_idle(void)
80{
81 /* endless idle loop with no priority at all */
82 while (1) {
Vitja Makarov8b5f79f2008-02-29 12:24:23 +080083 void (*idle)(void) = pm_idle;
84
85#ifdef CONFIG_HOTPLUG_CPU
86 if (cpu_is_offline(smp_processor_id()))
87 cpu_die();
88#endif
89 if (!idle)
90 idle = default_idle;
Frederic Weisbecker1268fbc2011-11-17 18:48:14 +010091 tick_nohz_idle_enter();
92 rcu_idle_enter();
Vitja Makarov8b5f79f2008-02-29 12:24:23 +080093 while (!need_resched())
94 idle();
Frederic Weisbecker1268fbc2011-11-17 18:48:14 +010095 rcu_idle_exit();
96 tick_nohz_idle_exit();
Thomas Gleixnerbd2f5532011-03-21 12:33:18 +010097 schedule_preempt_disabled();
Bryan Wu1394f032007-05-06 14:50:22 -070098 }
99}
100
Bryan Wu1394f032007-05-06 14:50:22 -0700101/*
102 * This gets run with P1 containing the
103 * function to call, and R1 containing
104 * the "args". Note P0 is clobbered on the way here.
105 */
106void kernel_thread_helper(void);
107__asm__(".section .text\n"
108 ".align 4\n"
109 "_kernel_thread_helper:\n\t"
110 "\tsp += -12;\n\t"
111 "\tr0 = r1;\n\t" "\tcall (p1);\n\t" "\tcall _do_exit;\n" ".previous");
112
113/*
114 * Create a kernel thread.
115 */
116pid_t kernel_thread(int (*fn) (void *), void *arg, unsigned long flags)
117{
118 struct pt_regs regs;
119
120 memset(&regs, 0, sizeof(regs));
121
122 regs.r1 = (unsigned long)arg;
123 regs.p1 = (unsigned long)fn;
124 regs.pc = (unsigned long)kernel_thread_helper;
125 regs.orig_p0 = -1;
126 /* Set bit 2 to tell ret_from_fork we should be returning to kernel
127 mode. */
128 regs.ipend = 0x8002;
129 __asm__ __volatile__("%0 = syscfg;":"=da"(regs.syscfg):);
130 return do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0, &regs, 0, NULL,
131 NULL);
132}
Mike Frysingerfe8015c2008-10-28 11:07:15 +0800133EXPORT_SYMBOL(kernel_thread);
Bryan Wu1394f032007-05-06 14:50:22 -0700134
Mike Frysingerd5ce5282009-06-13 11:32:34 -0400135/*
136 * Do necessary setup to start up a newly executed thread.
137 *
138 * pass the data segment into user programs if it exists,
139 * it can't hurt anything as far as I can tell
140 */
141void start_thread(struct pt_regs *regs, unsigned long new_ip, unsigned long new_sp)
142{
Mike Frysingerd5ce5282009-06-13 11:32:34 -0400143 regs->pc = new_ip;
144 if (current->mm)
145 regs->p5 = current->mm->start_data;
Graf Yangaa235312009-09-21 11:51:31 +0000146#ifndef CONFIG_SMP
Mike Frysingerd5ce5282009-06-13 11:32:34 -0400147 task_thread_info(current)->l1_task_info.stack_start =
148 (void *)current->mm->context.stack_start;
149 task_thread_info(current)->l1_task_info.lowest_sp = (void *)new_sp;
150 memcpy(L1_SCRATCH_TASK_INFO, &task_thread_info(current)->l1_task_info,
151 sizeof(*L1_SCRATCH_TASK_INFO));
152#endif
153 wrusp(new_sp);
154}
155EXPORT_SYMBOL_GPL(start_thread);
156
Bryan Wu1394f032007-05-06 14:50:22 -0700157void flush_thread(void)
158{
159}
160
161asmlinkage int bfin_vfork(struct pt_regs *regs)
162{
163 return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, rdusp(), regs, 0, NULL,
164 NULL);
165}
166
167asmlinkage int bfin_clone(struct pt_regs *regs)
168{
169 unsigned long clone_flags;
170 unsigned long newsp;
171
Graf Yang8f658732008-11-18 17:48:22 +0800172#ifdef __ARCH_SYNC_CORE_DCACHE
KOSAKI Motohiroe887eb62011-04-26 10:56:42 +0900173 if (current->rt.nr_cpus_allowed == num_possible_cpus())
174 set_cpus_allowed_ptr(current, cpumask_of(smp_processor_id()));
Graf Yang8f658732008-11-18 17:48:22 +0800175#endif
176
Bryan Wu1394f032007-05-06 14:50:22 -0700177 /* syscall2 puts clone_flags in r0 and usp in r1 */
178 clone_flags = regs->r0;
179 newsp = regs->r1;
180 if (!newsp)
181 newsp = rdusp();
182 else
183 newsp -= 12;
184 return do_fork(clone_flags, newsp, regs, 0, NULL, NULL);
185}
186
187int
Alexey Dobriyan6f2c55b2009-04-02 16:56:59 -0700188copy_thread(unsigned long clone_flags,
Bryan Wu1394f032007-05-06 14:50:22 -0700189 unsigned long usp, unsigned long topstk,
190 struct task_struct *p, struct pt_regs *regs)
191{
192 struct pt_regs *childregs;
193
194 childregs = (struct pt_regs *) (task_stack_page(p) + THREAD_SIZE) - 1;
195 *childregs = *regs;
196 childregs->r0 = 0;
197
198 p->thread.usp = usp;
199 p->thread.ksp = (unsigned long)childregs;
200 p->thread.pc = (unsigned long)ret_from_fork;
201
202 return 0;
203}
204
205/*
Bryan Wu1394f032007-05-06 14:50:22 -0700206 * sys_execve() executes a new program.
207 */
David Howellsd7627462010-08-17 23:52:56 +0100208asmlinkage int sys_execve(const char __user *name,
209 const char __user *const __user *argv,
210 const char __user *const __user *envp)
Bryan Wu1394f032007-05-06 14:50:22 -0700211{
212 int error;
213 char *filename;
214 struct pt_regs *regs = (struct pt_regs *)((&name) + 6);
215
Bryan Wu1394f032007-05-06 14:50:22 -0700216 filename = getname(name);
217 error = PTR_ERR(filename);
218 if (IS_ERR(filename))
John Kacur25708a52009-10-12 22:44:40 +0200219 return error;
Bryan Wu1394f032007-05-06 14:50:22 -0700220 error = do_execve(filename, argv, envp, regs);
221 putname(filename);
Bryan Wu1394f032007-05-06 14:50:22 -0700222 return error;
223}
224
225unsigned long get_wchan(struct task_struct *p)
226{
227 unsigned long fp, pc;
228 unsigned long stack_page;
229 int count = 0;
230 if (!p || p == current || p->state == TASK_RUNNING)
231 return 0;
232
233 stack_page = (unsigned long)p;
234 fp = p->thread.usp;
235 do {
236 if (fp < stack_page + sizeof(struct thread_info) ||
237 fp >= 8184 + stack_page)
238 return 0;
239 pc = ((unsigned long *)fp)[1];
240 if (!in_sched_functions(pc))
241 return pc;
242 fp = *(unsigned long *)fp;
243 }
244 while (count++ < 16);
245 return 0;
246}
247
Bernd Schmidt7adfb582007-06-21 11:34:16 +0800248void finish_atomic_sections (struct pt_regs *regs)
249{
Bernd Schmidt19d6d7d2008-05-07 11:41:26 +0800250 int __user *up0 = (int __user *)regs->p0;
Mike Frysinger0ddeeca2008-03-07 02:37:41 +0800251
Bernd Schmidt7adfb582007-06-21 11:34:16 +0800252 switch (regs->pc) {
Mike Frysinger2f5a0862009-11-19 19:15:26 +0000253 default:
254 /* not in middle of an atomic step, so resume like normal */
255 return;
256
Bernd Schmidt7adfb582007-06-21 11:34:16 +0800257 case ATOMIC_XCHG32 + 2:
Mike Frysinger0ddeeca2008-03-07 02:37:41 +0800258 put_user(regs->r1, up0);
Bernd Schmidt7adfb582007-06-21 11:34:16 +0800259 break;
260
261 case ATOMIC_CAS32 + 2:
262 case ATOMIC_CAS32 + 4:
263 if (regs->r0 == regs->r1)
Mike Frysinger92649492009-08-17 19:05:07 +0000264 case ATOMIC_CAS32 + 6:
Mike Frysinger0ddeeca2008-03-07 02:37:41 +0800265 put_user(regs->r2, up0);
Bernd Schmidt7adfb582007-06-21 11:34:16 +0800266 break;
Bernd Schmidt7adfb582007-06-21 11:34:16 +0800267
268 case ATOMIC_ADD32 + 2:
269 regs->r0 = regs->r1 + regs->r0;
270 /* fall through */
271 case ATOMIC_ADD32 + 4:
Mike Frysinger0ddeeca2008-03-07 02:37:41 +0800272 put_user(regs->r0, up0);
Bernd Schmidt7adfb582007-06-21 11:34:16 +0800273 break;
274
275 case ATOMIC_SUB32 + 2:
276 regs->r0 = regs->r1 - regs->r0;
277 /* fall through */
278 case ATOMIC_SUB32 + 4:
Mike Frysinger0ddeeca2008-03-07 02:37:41 +0800279 put_user(regs->r0, up0);
Bernd Schmidt7adfb582007-06-21 11:34:16 +0800280 break;
281
282 case ATOMIC_IOR32 + 2:
283 regs->r0 = regs->r1 | regs->r0;
284 /* fall through */
285 case ATOMIC_IOR32 + 4:
Mike Frysinger0ddeeca2008-03-07 02:37:41 +0800286 put_user(regs->r0, up0);
Bernd Schmidt7adfb582007-06-21 11:34:16 +0800287 break;
288
289 case ATOMIC_AND32 + 2:
290 regs->r0 = regs->r1 & regs->r0;
291 /* fall through */
292 case ATOMIC_AND32 + 4:
Mike Frysinger0ddeeca2008-03-07 02:37:41 +0800293 put_user(regs->r0, up0);
Bernd Schmidt7adfb582007-06-21 11:34:16 +0800294 break;
295
296 case ATOMIC_XOR32 + 2:
297 regs->r0 = regs->r1 ^ regs->r0;
298 /* fall through */
299 case ATOMIC_XOR32 + 4:
Mike Frysinger0ddeeca2008-03-07 02:37:41 +0800300 put_user(regs->r0, up0);
Bernd Schmidt7adfb582007-06-21 11:34:16 +0800301 break;
302 }
Mike Frysinger2f5a0862009-11-19 19:15:26 +0000303
304 /*
305 * We've finished the atomic section, and the only thing left for
306 * userspace is to do a RTS, so we might as well handle that too
307 * since we need to update the PC anyways.
308 */
309 regs->pc = regs->rets;
Bernd Schmidt7adfb582007-06-21 11:34:16 +0800310}
311
Mike Frysingere56e03b2009-06-07 16:31:52 -0400312static inline
313int in_mem(unsigned long addr, unsigned long size,
314 unsigned long start, unsigned long end)
315{
316 return addr >= start && addr + size <= end;
317}
318static inline
319int in_mem_const_off(unsigned long addr, unsigned long size, unsigned long off,
320 unsigned long const_addr, unsigned long const_size)
321{
322 return const_size &&
323 in_mem(addr, size, const_addr + off, const_addr + const_size);
324}
325static inline
326int in_mem_const(unsigned long addr, unsigned long size,
327 unsigned long const_addr, unsigned long const_size)
328{
Mike Frysingerfb4b5d32009-06-29 14:20:10 -0400329 return in_mem_const_off(addr, size, 0, const_addr, const_size);
Mike Frysingere56e03b2009-06-07 16:31:52 -0400330}
Bernd Schmidt13048f82009-09-23 16:47:16 +0000331#define ASYNC_ENABLED(bnum, bctlnum) \
Mike Frysingere56e03b2009-06-07 16:31:52 -0400332({ \
Bernd Schmidt13048f82009-09-23 16:47:16 +0000333 (bfin_read_EBIU_AMGCTL() & 0xe) < ((bnum + 1) << 1) ? 0 : \
334 bfin_read_EBIU_AMBCTL##bctlnum() & B##bnum##RDYEN ? 0 : \
335 1; \
Mike Frysingere56e03b2009-06-07 16:31:52 -0400336})
Bernd Schmidt13048f82009-09-23 16:47:16 +0000337/*
338 * We can't read EBIU banks that aren't enabled or we end up hanging
339 * on the access to the async space. Make sure we validate accesses
340 * that cross async banks too.
341 * 0 - found, but unusable
342 * 1 - found & usable
343 * 2 - not found
344 */
345static
346int in_async(unsigned long addr, unsigned long size)
347{
348 if (addr >= ASYNC_BANK0_BASE && addr < ASYNC_BANK0_BASE + ASYNC_BANK0_SIZE) {
349 if (!ASYNC_ENABLED(0, 0))
350 return 0;
351 if (addr + size <= ASYNC_BANK0_BASE + ASYNC_BANK0_SIZE)
352 return 1;
353 size -= ASYNC_BANK0_BASE + ASYNC_BANK0_SIZE - addr;
354 addr = ASYNC_BANK0_BASE + ASYNC_BANK0_SIZE;
355 }
356 if (addr >= ASYNC_BANK1_BASE && addr < ASYNC_BANK1_BASE + ASYNC_BANK1_SIZE) {
357 if (!ASYNC_ENABLED(1, 0))
358 return 0;
359 if (addr + size <= ASYNC_BANK1_BASE + ASYNC_BANK1_SIZE)
360 return 1;
361 size -= ASYNC_BANK1_BASE + ASYNC_BANK1_SIZE - addr;
362 addr = ASYNC_BANK1_BASE + ASYNC_BANK1_SIZE;
363 }
364 if (addr >= ASYNC_BANK2_BASE && addr < ASYNC_BANK2_BASE + ASYNC_BANK2_SIZE) {
365 if (!ASYNC_ENABLED(2, 1))
366 return 0;
367 if (addr + size <= ASYNC_BANK2_BASE + ASYNC_BANK2_SIZE)
368 return 1;
369 size -= ASYNC_BANK2_BASE + ASYNC_BANK2_SIZE - addr;
370 addr = ASYNC_BANK2_BASE + ASYNC_BANK2_SIZE;
371 }
372 if (addr >= ASYNC_BANK3_BASE && addr < ASYNC_BANK3_BASE + ASYNC_BANK3_SIZE) {
373 if (ASYNC_ENABLED(3, 1))
374 return 0;
375 if (addr + size <= ASYNC_BANK3_BASE + ASYNC_BANK3_SIZE)
376 return 1;
377 return 0;
378 }
379
380 /* not within async bounds */
381 return 2;
382}
Mike Frysingere56e03b2009-06-07 16:31:52 -0400383
384int bfin_mem_access_type(unsigned long addr, unsigned long size)
385{
386 int cpu = raw_smp_processor_id();
387
388 /* Check that things do not wrap around */
389 if (addr > ULONG_MAX - size)
390 return -EFAULT;
391
392 if (in_mem(addr, size, FIXED_CODE_START, physical_mem_end))
393 return BFIN_MEM_ACCESS_CORE;
394
395 if (in_mem_const(addr, size, L1_CODE_START, L1_CODE_LENGTH))
396 return cpu == 0 ? BFIN_MEM_ACCESS_ITEST : BFIN_MEM_ACCESS_IDMA;
397 if (in_mem_const(addr, size, L1_SCRATCH_START, L1_SCRATCH_LENGTH))
398 return cpu == 0 ? BFIN_MEM_ACCESS_CORE_ONLY : -EFAULT;
399 if (in_mem_const(addr, size, L1_DATA_A_START, L1_DATA_A_LENGTH))
400 return cpu == 0 ? BFIN_MEM_ACCESS_CORE : BFIN_MEM_ACCESS_IDMA;
401 if (in_mem_const(addr, size, L1_DATA_B_START, L1_DATA_B_LENGTH))
402 return cpu == 0 ? BFIN_MEM_ACCESS_CORE : BFIN_MEM_ACCESS_IDMA;
403#ifdef COREB_L1_CODE_START
Mike Frysingerfb4b5d32009-06-29 14:20:10 -0400404 if (in_mem_const(addr, size, COREB_L1_CODE_START, COREB_L1_CODE_LENGTH))
Mike Frysingere56e03b2009-06-07 16:31:52 -0400405 return cpu == 1 ? BFIN_MEM_ACCESS_ITEST : BFIN_MEM_ACCESS_IDMA;
406 if (in_mem_const(addr, size, COREB_L1_SCRATCH_START, L1_SCRATCH_LENGTH))
407 return cpu == 1 ? BFIN_MEM_ACCESS_CORE_ONLY : -EFAULT;
Mike Frysingerfb4b5d32009-06-29 14:20:10 -0400408 if (in_mem_const(addr, size, COREB_L1_DATA_A_START, COREB_L1_DATA_A_LENGTH))
Mike Frysingere56e03b2009-06-07 16:31:52 -0400409 return cpu == 1 ? BFIN_MEM_ACCESS_CORE : BFIN_MEM_ACCESS_IDMA;
Mike Frysingerfb4b5d32009-06-29 14:20:10 -0400410 if (in_mem_const(addr, size, COREB_L1_DATA_B_START, COREB_L1_DATA_B_LENGTH))
Mike Frysingere56e03b2009-06-07 16:31:52 -0400411 return cpu == 1 ? BFIN_MEM_ACCESS_CORE : BFIN_MEM_ACCESS_IDMA;
412#endif
413 if (in_mem_const(addr, size, L2_START, L2_LENGTH))
414 return BFIN_MEM_ACCESS_CORE;
415
416 if (addr >= SYSMMR_BASE)
417 return BFIN_MEM_ACCESS_CORE_ONLY;
418
Bernd Schmidt13048f82009-09-23 16:47:16 +0000419 switch (in_async(addr, size)) {
420 case 0: return -EFAULT;
421 case 1: return BFIN_MEM_ACCESS_CORE;
422 case 2: /* fall through */;
423 }
Mike Frysingere56e03b2009-06-07 16:31:52 -0400424
425 if (in_mem_const(addr, size, BOOT_ROM_START, BOOT_ROM_LENGTH))
426 return BFIN_MEM_ACCESS_CORE;
427 if (in_mem_const(addr, size, L1_ROM_START, L1_ROM_LENGTH))
428 return BFIN_MEM_ACCESS_DMA;
429
430 return -EFAULT;
431}
432
Bryan Wu1394f032007-05-06 14:50:22 -0700433#if defined(CONFIG_ACCESS_CHECK)
Mike Frysingera43b7392009-06-04 19:24:31 +0000434#ifdef CONFIG_ACCESS_OK_L1
435__attribute__((l1_text))
436#endif
Robin Getzb03b08b2007-12-23 22:57:01 +0800437/* Return 1 if access to memory range is OK, 0 otherwise */
Bryan Wu1394f032007-05-06 14:50:22 -0700438int _access_ok(unsigned long addr, unsigned long size)
439{
Bernd Schmidt13048f82009-09-23 16:47:16 +0000440 int aret;
441
Bernd Schmidtbc41bb12007-10-10 17:54:19 +0800442 if (size == 0)
443 return 1;
Mike Frysingere56e03b2009-06-07 16:31:52 -0400444 /* Check that things do not wrap around */
445 if (addr > ULONG_MAX - size)
Bryan Wu1394f032007-05-06 14:50:22 -0700446 return 0;
Mike Frysinger1f83b8f2007-07-12 22:58:21 +0800447 if (segment_eq(get_fs(), KERNEL_DS))
Bryan Wu1394f032007-05-06 14:50:22 -0700448 return 1;
449#ifdef CONFIG_MTD_UCLINUX
Mike Frysingere56e03b2009-06-07 16:31:52 -0400450 if (1)
451#else
452 if (0)
453#endif
454 {
455 if (in_mem(addr, size, memory_start, memory_end))
456 return 1;
457 if (in_mem(addr, size, memory_mtd_end, physical_mem_end))
458 return 1;
459# ifndef CONFIG_ROMFS_ON_MTD
460 if (0)
461# endif
462 /* For XIP, allow user space to use pointers within the ROMFS. */
463 if (in_mem(addr, size, memory_mtd_start, memory_mtd_end))
464 return 1;
465 } else {
466 if (in_mem(addr, size, memory_start, physical_mem_end))
467 return 1;
468 }
469
470 if (in_mem(addr, size, (unsigned long)__init_begin, (unsigned long)__init_end))
Bryan Wu1394f032007-05-06 14:50:22 -0700471 return 1;
Bernd Schmidtd5adb022008-04-24 03:06:15 +0800472
Mike Frysingere56e03b2009-06-07 16:31:52 -0400473 if (in_mem_const(addr, size, L1_CODE_START, L1_CODE_LENGTH))
474 return 1;
475 if (in_mem_const_off(addr, size, _etext_l1 - _stext_l1, L1_CODE_START, L1_CODE_LENGTH))
476 return 1;
477 if (in_mem_const_off(addr, size, _ebss_l1 - _sdata_l1, L1_DATA_A_START, L1_DATA_A_LENGTH))
478 return 1;
479 if (in_mem_const_off(addr, size, _ebss_b_l1 - _sdata_b_l1, L1_DATA_B_START, L1_DATA_B_LENGTH))
480 return 1;
481#ifdef COREB_L1_CODE_START
Mike Frysingerfb4b5d32009-06-29 14:20:10 -0400482 if (in_mem_const(addr, size, COREB_L1_CODE_START, COREB_L1_CODE_LENGTH))
Mike Frysingere56e03b2009-06-07 16:31:52 -0400483 return 1;
484 if (in_mem_const(addr, size, COREB_L1_SCRATCH_START, L1_SCRATCH_LENGTH))
485 return 1;
Mike Frysingerfb4b5d32009-06-29 14:20:10 -0400486 if (in_mem_const(addr, size, COREB_L1_DATA_A_START, COREB_L1_DATA_A_LENGTH))
Mike Frysingere56e03b2009-06-07 16:31:52 -0400487 return 1;
Mike Frysingerfb4b5d32009-06-29 14:20:10 -0400488 if (in_mem_const(addr, size, COREB_L1_DATA_B_START, COREB_L1_DATA_B_LENGTH))
Bernd Schmidtd5adb022008-04-24 03:06:15 +0800489 return 1;
490#endif
Bernd Schmidt13048f82009-09-23 16:47:16 +0000491
Barry Song41c3e332010-06-29 08:43:38 +0000492#ifndef CONFIG_EXCEPTION_L1_SCRATCH
493 if (in_mem_const(addr, size, (unsigned long)l1_stack_base, l1_stack_len))
494 return 1;
495#endif
496
Bernd Schmidt13048f82009-09-23 16:47:16 +0000497 aret = in_async(addr, size);
498 if (aret < 2)
499 return aret;
500
Mike Frysingere56e03b2009-06-07 16:31:52 -0400501 if (in_mem_const_off(addr, size, _ebss_l2 - _stext_l2, L2_START, L2_LENGTH))
Bryan Wu1394f032007-05-06 14:50:22 -0700502 return 1;
Mike Frysingere56e03b2009-06-07 16:31:52 -0400503
504 if (in_mem_const(addr, size, BOOT_ROM_START, BOOT_ROM_LENGTH))
Bryan Wu1394f032007-05-06 14:50:22 -0700505 return 1;
Mike Frysingere56e03b2009-06-07 16:31:52 -0400506 if (in_mem_const(addr, size, L1_ROM_START, L1_ROM_LENGTH))
Bryan Wu1394f032007-05-06 14:50:22 -0700507 return 1;
Mike Frysingere56e03b2009-06-07 16:31:52 -0400508
Bryan Wu1394f032007-05-06 14:50:22 -0700509 return 0;
510}
511EXPORT_SYMBOL(_access_ok);
512#endif /* CONFIG_ACCESS_CHECK */