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[PATCH] m32r: Remove a warning in m32r_sio.c
[net-next-2.6.git] / arch / m32r / kernel / entry.S
CommitLineData
1da177e4
LT		 1/*
2 * linux/arch/m32r/kernel/entry.S
3 *
4 * Copyright (c) 2001, 2002 Hirokazu Takata, Hitoshi Yamamoto, H. Kondo
5 * Copyright (c) 2003 Hitoshi Yamamoto
6 * Copyright (c) 2004 Hirokazu Takata <takata at linux-m32r.org>
7 *
8 * Taken from i386 version.
9 * Copyright (C) 1991, 1992 Linus Torvalds
10 */
11
12/*
13 * entry.S contains the system-call and fault low-level handling routines.
14 * This also contains the timer-interrupt handler, as well as all interrupts
15 * and faults that can result in a task-switch.
16 *
17 * NOTE: This code handles signal-recognition, which happens every time
18 * after a timer-interrupt and after each system call.
19 *
20 * Stack layout in 'ret_from_system_call':
21 * ptrace needs to have all regs on the stack.
22 * if the order here is changed, it needs to be
8e8ff02c 23 * updated in fork.c:copy_thread, signal.c:do_signal,
1da177e4
LT		 24 * ptrace.c and ptrace.h
25 *
26 * M32Rx/M32R2 M32R
27 * @(sp) - r4 ditto
28 * @(0x04,sp) - r5 ditto
29 * @(0x08,sp) - r6 ditto
30 * @(0x0c,sp) - *pt_regs ditto
31 * @(0x10,sp) - r0 ditto
32 * @(0x14,sp) - r1 ditto
33 * @(0x18,sp) - r2 ditto
34 * @(0x1c,sp) - r3 ditto
35 * @(0x20,sp) - r7 ditto
36 * @(0x24,sp) - r8 ditto
37 * @(0x28,sp) - r9 ditto
38 * @(0x2c,sp) - r10 ditto
39 * @(0x30,sp) - r11 ditto
40 * @(0x34,sp) - r12 ditto
41 * @(0x38,sp) - syscall_nr ditto
42 * @(0x3c,sp) - acc0h @(0x3c,sp) - acch
43 * @(0x40,sp) - acc0l @(0x40,sp) - accl
8e8ff02c
HT		 44 * @(0x44,sp) - acc1h @(0x44,sp) - dummy_acc1h
45 * @(0x48,sp) - acc1l @(0x48,sp) - dummy_acc1l
46 * @(0x4c,sp) - psw ditto
47 * @(0x50,sp) - bpc ditto
48 * @(0x54,sp) - bbpsw ditto
49 * @(0x58,sp) - bbpc ditto
50 * @(0x5c,sp) - spu (cr3) ditto
51 * @(0x60,sp) - fp (r13) ditto
52 * @(0x64,sp) - lr (r14) ditto
53 * @(0x68,sp) - spi (cr2) ditto
54 * @(0x6c,sp) - orig_r0 ditto
1da177e4
LT		 55 */
56
57#include <linux/config.h>
58#include <linux/linkage.h>
59#include <asm/irq.h>
60#include <asm/unistd.h>
61#include <asm/assembler.h>
62#include <asm/thread_info.h>
63#include <asm/errno.h>
64#include <asm/segment.h>
65#include <asm/smp.h>
66#include <asm/page.h>
67#include <asm/m32r.h>
68#include <asm/mmu_context.h>
69
70#if !defined(CONFIG_MMU)
71#define sys_madvise sys_ni_syscall
72#define sys_readahead sys_ni_syscall
73#define sys_mprotect sys_ni_syscall
74#define sys_msync sys_ni_syscall
75#define sys_mlock sys_ni_syscall
76#define sys_munlock sys_ni_syscall
77#define sys_mlockall sys_ni_syscall
78#define sys_munlockall sys_ni_syscall
79#define sys_mremap sys_ni_syscall
80#define sys_mincore sys_ni_syscall
81#define sys_remap_file_pages sys_ni_syscall
82#endif /* CONFIG_MMU */
83
84#define R4(reg) @reg
85#define R5(reg) @(0x04,reg)
86#define R6(reg) @(0x08,reg)
87#define PTREGS(reg) @(0x0C,reg)
88#define R0(reg) @(0x10,reg)
89#define R1(reg) @(0x14,reg)
90#define R2(reg) @(0x18,reg)
91#define R3(reg) @(0x1C,reg)
92#define R7(reg) @(0x20,reg)
93#define R8(reg) @(0x24,reg)
94#define R9(reg) @(0x28,reg)
95#define R10(reg) @(0x2C,reg)
96#define R11(reg) @(0x30,reg)
97#define R12(reg) @(0x34,reg)
98#define SYSCALL_NR(reg) @(0x38,reg)
99#if defined(CONFIG_ISA_M32R2) && defined(CONFIG_ISA_DSP_LEVEL2)
100#define ACC0H(reg) @(0x3C,reg)
101#define ACC0L(reg) @(0x40,reg)
102#define ACC1H(reg) @(0x44,reg)
103#define ACC1L(reg) @(0x48,reg)
8e8ff02c
HT		 104#elif defined(CONFIG_ISA_M32R2) || defined(CONFIG_ISA_M32R)
105#define ACCH(reg) @(0x3C,reg)
106#define ACCL(reg) @(0x40,reg)
107#else
108#error unknown isa configuration
109#endif
1da177e4
LT		 110#define PSW(reg) @(0x4C,reg)
111#define BPC(reg) @(0x50,reg)
112#define BBPSW(reg) @(0x54,reg)
113#define BBPC(reg) @(0x58,reg)
114#define SPU(reg) @(0x5C,reg)
115#define FP(reg) @(0x60,reg) /* FP = R13 */
116#define LR(reg) @(0x64,reg)
117#define SP(reg) @(0x68,reg)
118#define ORIG_R0(reg) @(0x6C,reg)
1da177e4
LT		 119
120CF_MASK = 0x00000001
121TF_MASK = 0x00000100
122IF_MASK = 0x00000200
123DF_MASK = 0x00000400
124NT_MASK = 0x00004000
125VM_MASK = 0x00020000
126
127#ifdef CONFIG_PREEMPT
128#define preempt_stop(x) CLI(x)
129#else
130#define preempt_stop(x)
131#define resume_kernel restore_all
132#endif
133
134ENTRY(ret_from_fork)
135 ld r0, @sp+
136 bl schedule_tail
137 GET_THREAD_INFO(r8)
138 bra syscall_exit
139
140/*
141 * Return to user mode is not as complex as all this looks,
142 * but we want the default path for a system call return to
143 * go as quickly as possible which is why some of this is
144 * less clear than it otherwise should be.
145 */
146
147 ; userspace resumption stub bypassing syscall exit tracing
148 ALIGN
149ret_from_exception:
150 preempt_stop(r4)
151ret_from_intr:
152 ld r4, PSW(sp)
153#ifdef CONFIG_ISA_M32R2
154 and3 r4, r4, #0x8800 ; check BSM and BPM bits
155#else
156 and3 r4, r4, #0x8000 ; check BSM bit
157#endif
158 beqz r4, resume_kernel
159ENTRY(resume_userspace)
160 CLI(r4) ; make sure we don't miss an interrupt
161 ; setting need_resched or sigpending
162 ; between sampling and the iret
163 GET_THREAD_INFO(r8)
164 ld r9, @(TI_FLAGS, r8)
165 and3 r4, r9, #_TIF_WORK_MASK ; is there any work to be done on
166 ; int/exception return?
167 bnez r4, work_pending
168 bra restore_all
169
170#ifdef CONFIG_PREEMPT
171ENTRY(resume_kernel)
172 GET_THREAD_INFO(r8)
173 ld r9, @(TI_PRE_COUNT, r8) ; non-zero preempt_count ?
174 bnez r9, restore_all
175need_resched:
176 ld r9, @(TI_FLAGS, r8) ; need_resched set ?
177 and3 r4, r9, #_TIF_NEED_RESCHED
178 beqz r4, restore_all
179 ld r4, PSW(sp) ; interrupts off (exception path) ?
180 and3 r4, r4, #0x4000
181 beqz r4, restore_all
182 LDIMM (r4, PREEMPT_ACTIVE)
183 st r4, @(TI_PRE_COUNT, r8)
184 STI(r4)
185 bl schedule
186 ldi r4, #0
187 st r4, @(TI_PRE_COUNT, r8)
188 CLI(r4)
189 bra need_resched
190#endif
191
192 ; system call handler stub
193ENTRY(system_call)
194 SWITCH_TO_KERNEL_STACK
195 SAVE_ALL
196 STI(r4) ; Enable interrupt
197 st sp, PTREGS(sp) ; implicit pt_regs parameter
198 cmpui r7, #NR_syscalls
199 bnc syscall_badsys
200 st r7, SYSCALL_NR(sp) ; syscall_nr
201 ; system call tracing in operation
202 GET_THREAD_INFO(r8)
203 ld r9, @(TI_FLAGS, r8)
204 and3 r4, r9, #_TIF_SYSCALL_TRACE
205 bnez r4, syscall_trace_entry
206syscall_call:
207 slli r7, #2 ; table jump for the system call
208 LDIMM (r4, sys_call_table)
209 add r7, r4
210 ld r7, @r7
211 jl r7 ; execute system call
212 st r0, R0(sp) ; save the return value
213syscall_exit:
214 CLI(r4) ; make sure we don't miss an interrupt
215 ; setting need_resched or sigpending
216 ; between sampling and the iret
217 ld r9, @(TI_FLAGS, r8)
218 and3 r4, r9, #_TIF_ALLWORK_MASK ; current->work
219 bnez r4, syscall_exit_work
220restore_all:
221 RESTORE_ALL
222
223 # perform work that needs to be done immediately before resumption
8e8ff02c 224 # r9 : flags
1da177e4
LT		 225 ALIGN
226work_pending:
227 and3 r4, r9, #_TIF_NEED_RESCHED
228 beqz r4, work_notifysig
229work_resched:
230 bl schedule
231 CLI(r4) ; make sure we don't miss an interrupt
232 ; setting need_resched or sigpending
233 ; between sampling and the iret
234 ld r9, @(TI_FLAGS, r8)
235 and3 r4, r9, #_TIF_WORK_MASK ; is there any work to be done other
236 ; than syscall tracing?
237 beqz r4, restore_all
238 and3 r4, r4, #_TIF_NEED_RESCHED
239 bnez r4, work_resched
240
241work_notifysig: ; deal with pending signals and
242 ; notify-resume requests
243 mv r0, sp ; arg1 : struct pt_regs *regs
244 ldi r1, #0 ; arg2 : sigset_t *oldset
245 mv r2, r9 ; arg3 : __u32 thread_info_flags
246 bl do_notify_resume
247 bra restore_all
248
249 ; perform syscall exit tracing
250 ALIGN
251syscall_trace_entry:
252 ldi r4, #-ENOSYS
253 st r4, R0(sp)
254 bl do_syscall_trace
255 ld r0, ORIG_R0(sp)
256 ld r1, R1(sp)
257 ld r2, R2(sp)
258 ld r3, R3(sp)
259 ld r4, R4(sp)
260 ld r5, R5(sp)
261 ld r6, R6(sp)
262 ld r7, SYSCALL_NR(sp)
263 cmpui r7, #NR_syscalls
264 bc syscall_call
265 bra syscall_exit
266
267 ; perform syscall exit tracing
268 ALIGN
269syscall_exit_work:
270 ld r9, @(TI_FLAGS, r8)
271 and3 r4, r9, #_TIF_SYSCALL_TRACE
272 beqz r4, work_pending
273 STI(r4) ; could let do_syscall_trace() call
274 ; schedule() instead
275 bl do_syscall_trace
276 bra resume_userspace
277
278 ALIGN
279syscall_fault:
280 SAVE_ALL
281 GET_THREAD_INFO(r8)
282 ldi r4, #-EFAULT
283 st r4, R0(sp)
284 bra resume_userspace
285
286 ALIGN
287syscall_badsys:
288 ldi r4, #-ENOSYS
289 st r4, R0(sp)
290 bra resume_userspace
291
292 .global eit_vector
293
294 .equ ei_vec_table, eit_vector + 0x0200
295
296/*
297 * EI handler routine
298 */
299ENTRY(ei_handler)
300#if defined(CONFIG_CHIP_M32700)
301 SWITCH_TO_KERNEL_STACK
302 ; WORKAROUND: force to clear SM bit and use the kernel stack (SPI).
303#endif
304 SAVE_ALL
305 mv r1, sp ; arg1(regs)
306#if defined(CONFIG_CHIP_VDEC2) || defined(CONFIG_CHIP_XNUX2) \
307 || defined(CONFIG_CHIP_M32700) || defined(CONFIG_CHIP_M32102) \
9287d95e 308 || defined(CONFIG_CHIP_OPSP) || defined(CONFIG_CHIP_M32104)
1da177e4
LT		 309
310; GET_ICU_STATUS;
311 seth r0, #shigh(M32R_ICU_ISTS_ADDR)
312 ld r0, @(low(M32R_ICU_ISTS_ADDR),r0)
313 st r0, @-sp
314#if defined(CONFIG_SMP)
315 /*
316 * If IRQ == 0 --> Nothing to do, Not write IMASK
317 * If IRQ == IPI --> Do IPI handler, Not write IMASK
318 * If IRQ != 0, IPI --> Do do_IRQ(), Write IMASK
319 */
320 slli r0, #4
321 srli r0, #24 ; r0(irq_num<<2)
322 ;; IRQ exist check
323#if defined(CONFIG_CHIP_M32700)
324 /* WORKAROUND: IMASK bug M32700-TS1, TS2 chip. */
325 beqz r0, 3f ; if (!irq_num) goto exit
326#else
327 beqz r0, 1f ; if (!irq_num) goto exit
328#endif /* WORKAROUND */
329 ;; IPI check
330 cmpi r0, #(M32R_IRQ_IPI0<<2) ; ISN < IPI0 check
331 bc 2f
332 cmpi r0, #((M32R_IRQ_IPI7+1)<<2) ; ISN > IPI7 check
333 bnc 2f
334 LDIMM (r2, ei_vec_table)
335 add r2, r0
336 ld r2, @r2
337 beqz r2, 1f ; if (no IPI handler) goto exit
338 mv r0, r1 ; arg0(regs)
339 jl r2
340 .fillinsn
3411:
342 addi sp, #4
343 bra ret_to_intr
344#if defined(CONFIG_CHIP_M32700)
345 /* WORKAROUND: IMASK bug M32700-TS1, TS2 chip. */
346 .fillinsn
3473:
348 ld24 r14, #0x00070000
349 seth r0, #shigh(M32R_ICU_IMASK_ADDR)
350 st r14, @(low(M32R_ICU_IMASK_ADDR), r0)
351 addi sp, #4
352 bra ret_to_intr
353#endif /* WORKAROUND */
354 ;; do_IRQ
355 .fillinsn
3562:
357 srli r0, #2
358#if defined(CONFIG_PLAT_USRV)
359 add3 r2, r0, #-(M32R_IRQ_INT1) ; INT1# interrupt
360 bnez r2, 9f
361 ; read ICU status register of PLD
362 seth r0, #high(PLD_ICUISTS)
363 or3 r0, r0, #low(PLD_ICUISTS)
364 lduh r0, @r0
365 slli r0, #21
366 srli r0, #27 ; ISN
367 addi r0, #(M32700UT_PLD_IRQ_BASE)
368 .fillinsn
3699:
370#elif defined(CONFIG_PLAT_M32700UT)
371 add3 r2, r0, #-(M32R_IRQ_INT1) ; INT1# interrupt
372 bnez r2, check_int0
373 ; read ICU status register of PLD
374 seth r0, #high(PLD_ICUISTS)
375 or3 r0, r0, #low(PLD_ICUISTS)
376 lduh r0, @r0
377 slli r0, #21
378 srli r0, #27 ; ISN
379 addi r0, #(M32700UT_PLD_IRQ_BASE)
380 bra check_end
381 .fillinsn
382check_int0:
383 add3 r2, r0, #-(M32R_IRQ_INT0) ; INT0# interrupt
384 bnez r2, check_int2
385 ; read ICU status of LAN-board
386 seth r0, #high(M32700UT_LAN_ICUISTS)
387 or3 r0, r0, #low(M32700UT_LAN_ICUISTS)
388 lduh r0, @r0
389 slli r0, #21
390 srli r0, #27 ; ISN
391 add3 r0, r0, #(M32700UT_LAN_PLD_IRQ_BASE)
392 bra check_end
393 .fillinsn
394check_int2:
395 add3 r2, r0, #-(M32R_IRQ_INT2) ; INT2# interrupt
396 bnez r2, check_end
397 ; read ICU status of LCD-board
398 seth r0, #high(M32700UT_LCD_ICUISTS)
399 or3 r0, r0, #low(M32700UT_LCD_ICUISTS)
400 lduh r0, @r0
401 slli r0, #21
402 srli r0, #27 ; ISN
403 add3 r0, r0, #(M32700UT_LCD_PLD_IRQ_BASE)
404 bra check_end
405 .fillinsn
406check_end:
407#elif defined(CONFIG_PLAT_OPSPUT)
408 add3 r2, r0, #-(M32R_IRQ_INT1) ; INT1# interrupt
409 bnez r2, check_int0
410 ; read ICU status register of PLD
411 seth r0, #high(PLD_ICUISTS)
412 or3 r0, r0, #low(PLD_ICUISTS)
413 lduh r0, @r0
414 slli r0, #21
415 srli r0, #27 ; ISN
416 addi r0, #(OPSPUT_PLD_IRQ_BASE)
417 bra check_end
418 .fillinsn
419check_int0:
420 add3 r2, r0, #-(M32R_IRQ_INT0) ; INT0# interrupt
421 bnez r2, check_int2
422 ; read ICU status of LAN-board
423 seth r0, #high(OPSPUT_LAN_ICUISTS)
424 or3 r0, r0, #low(OPSPUT_LAN_ICUISTS)
425 lduh r0, @r0
426 slli r0, #21
427 srli r0, #27 ; ISN
428 add3 r0, r0, #(OPSPUT_LAN_PLD_IRQ_BASE)
429 bra check_end
430 .fillinsn
431check_int2:
432 add3 r2, r0, #-(M32R_IRQ_INT2) ; INT2# interrupt
433 bnez r2, check_end
434 ; read ICU status of LCD-board
435 seth r0, #high(OPSPUT_LCD_ICUISTS)
436 or3 r0, r0, #low(OPSPUT_LCD_ICUISTS)
437 lduh r0, @r0
438 slli r0, #21
439 srli r0, #27 ; ISN
440 add3 r0, r0, #(OPSPUT_LCD_PLD_IRQ_BASE)
441 bra check_end
442 .fillinsn
443check_end:
444#endif /* CONFIG_PLAT_OPSPUT */
445 bl do_IRQ ; r0(irq), r1(regs)
446#else /* not CONFIG_SMP */
447 srli r0, #22 ; r0(irq)
448#if defined(CONFIG_PLAT_USRV)
449 add3 r2, r0, #-(M32R_IRQ_INT1) ; INT1# interrupt
450 bnez r2, 1f
451 ; read ICU status register of PLD
452 seth r0, #high(PLD_ICUISTS)
453 or3 r0, r0, #low(PLD_ICUISTS)
454 lduh r0, @r0
455 slli r0, #21
456 srli r0, #27 ; ISN
457 addi r0, #(M32700UT_PLD_IRQ_BASE)
458 .fillinsn
4591:
460#elif defined(CONFIG_PLAT_M32700UT)
461 add3 r2, r0, #-(M32R_IRQ_INT1) ; INT1# interrupt
462 bnez r2, check_int0
463 ; read ICU status register of PLD
464 seth r0, #high(PLD_ICUISTS)
465 or3 r0, r0, #low(PLD_ICUISTS)
466 lduh r0, @r0
467 slli r0, #21
468 srli r0, #27 ; ISN
469 addi r0, #(M32700UT_PLD_IRQ_BASE)
470 bra check_end
471 .fillinsn
472check_int0:
473 add3 r2, r0, #-(M32R_IRQ_INT0) ; INT0# interrupt
474 bnez r2, check_int2
475 ; read ICU status of LAN-board
476 seth r0, #high(M32700UT_LAN_ICUISTS)
477 or3 r0, r0, #low(M32700UT_LAN_ICUISTS)
478 lduh r0, @r0
479 slli r0, #21
480 srli r0, #27 ; ISN
481 add3 r0, r0, #(M32700UT_LAN_PLD_IRQ_BASE)
482 bra check_end
483 .fillinsn
484check_int2:
485 add3 r2, r0, #-(M32R_IRQ_INT2) ; INT2# interrupt
486 bnez r2, check_end
487 ; read ICU status of LCD-board
488 seth r0, #high(M32700UT_LCD_ICUISTS)
489 or3 r0, r0, #low(M32700UT_LCD_ICUISTS)
490 lduh r0, @r0
491 slli r0, #21
492 srli r0, #27 ; ISN
493 add3 r0, r0, #(M32700UT_LCD_PLD_IRQ_BASE)
494 bra check_end
495 .fillinsn
496check_end:
497#elif defined(CONFIG_PLAT_OPSPUT)
498 add3 r2, r0, #-(M32R_IRQ_INT1) ; INT1# interrupt
499 bnez r2, check_int0
500 ; read ICU status register of PLD
501 seth r0, #high(PLD_ICUISTS)
502 or3 r0, r0, #low(PLD_ICUISTS)
503 lduh r0, @r0
504 slli r0, #21
505 srli r0, #27 ; ISN
506 addi r0, #(OPSPUT_PLD_IRQ_BASE)
507 bra check_end
508 .fillinsn
509check_int0:
510 add3 r2, r0, #-(M32R_IRQ_INT0) ; INT0# interrupt
511 bnez r2, check_int2
512 ; read ICU status of LAN-board
513 seth r0, #high(OPSPUT_LAN_ICUISTS)
514 or3 r0, r0, #low(OPSPUT_LAN_ICUISTS)
515 lduh r0, @r0
516 slli r0, #21
517 srli r0, #27 ; ISN
518 add3 r0, r0, #(OPSPUT_LAN_PLD_IRQ_BASE)
519 bra check_end
520 .fillinsn
521check_int2:
522 add3 r2, r0, #-(M32R_IRQ_INT2) ; INT2# interrupt
523 bnez r2, check_end
524 ; read ICU status of LCD-board
525 seth r0, #high(OPSPUT_LCD_ICUISTS)
526 or3 r0, r0, #low(OPSPUT_LCD_ICUISTS)
527 lduh r0, @r0
528 slli r0, #21
529 srli r0, #27 ; ISN
530 add3 r0, r0, #(OPSPUT_LCD_PLD_IRQ_BASE)
531 bra check_end
532 .fillinsn
533check_end:
9287d95e
HT		 534#elif defined(CONFIG_PLAT_M32104UT)
535 add3 r2, r0, #-(M32R_IRQ_INT1) ; INT1# interrupt
536 bnez r2, check_end
537 ; read ICU status register of PLD
538 seth r0, #high(PLD_ICUISTS)
539 or3 r0, r0, #low(PLD_ICUISTS)
540 lduh r0, @r0
541 slli r0, #21
542 srli r0, #27 ; ISN
543 addi r0, #(M32104UT_PLD_IRQ_BASE)
544 bra check_end
545 .fillinsn
546check_end:
547#endif /* CONFIG_PLAT_M32104UT */
1da177e4
LT		 548 bl do_IRQ
549#endif /* CONFIG_SMP */
550 ld r14, @sp+
551 seth r0, #shigh(M32R_ICU_IMASK_ADDR)
552 st r14, @(low(M32R_ICU_IMASK_ADDR),r0)
553#else
554#error no chip configuration
555#endif
556ret_to_intr:
557 bra ret_from_intr
558
559/*
560 * Default EIT handler
561 */
562 ALIGN
563int_msg:
564 .asciz "Unknown interrupt\n"
565 .byte 0
566
567ENTRY(default_eit_handler)
568 push r0
569 mvfc r0, psw
570 push r1
571 push r2
572 push r3
573 push r0
574 LDIMM (r0, __KERNEL_DS)
575 mv r0, r1
576 mv r0, r2
577 LDIMM (r0, int_msg)
578 bl printk
579 pop r0
580 pop r3
581 pop r2
582 pop r1
583 mvtc r0, psw
584 pop r0
585infinit:
586 bra infinit
587
588#ifdef CONFIG_MMU
589/*
590 * Access Exception handler
591 */
592ENTRY(ace_handler)
593 SWITCH_TO_KERNEL_STACK
594 SAVE_ALL
595
596 seth r2, #shigh(MMU_REG_BASE) /* Check status register */
597 ld r4, @(low(MESTS_offset),r2)
598 st r4, @(low(MESTS_offset),r2)
599 srl3 r1, r4, #4
600#ifdef CONFIG_CHIP_M32700
601 and3 r1, r1, #0x0000ffff
602 ; WORKAROUND: ignore TME bit for the M32700(TS1).
603#endif /* CONFIG_CHIP_M32700 */
604 beqz r1, inst
605oprand:
606 ld r2, @(low(MDEVA_offset),r2) ; set address
607 srli r2, #12
608 slli r2, #12
609 srli r1, #1
610 bra 1f
611inst:
612 and3 r1, r4, #2
613 srli r1, #1
614 or3 r1, r1, #8
615 mvfc r2, bpc ; set address
616 .fillinsn
6171:
618 mvfc r3, psw
619 mv r0, sp
620 and3 r3, r3, 0x800
621 srli r3, #9
622 or r1, r3
623 /*
624 * do_page_fault():
625 * r0 : struct pt_regs *regs
626 * r1 : unsigned long error-code
627 * r2 : unsigned long address
628 * error-code:
629 * +------+------+------+------+
630 * | bit3 | bit2 | bit1 | bit0 |
631 * +------+------+------+------+
632 * bit 3 == 0:means data, 1:means instruction
633 * bit 2 == 0:means kernel, 1:means user-mode
634 * bit 1 == 0:means read, 1:means write
635 * bit 0 == 0:means no page found 1:means protection fault
636 *
637 */
638 bl do_page_fault
639 bra ret_from_intr
640#endif /* CONFIG_MMU */
641
642
643ENTRY(alignment_check)
644/* void alignment_check(int error_code) */
645 SWITCH_TO_KERNEL_STACK
646 SAVE_ALL
647 ldi r1, #0x30 ; error_code
648 mv r0, sp ; pt_regs
649 bl do_alignment_check
650error_code:
651 bra ret_from_exception
652
653ENTRY(rie_handler)
654/* void rie_handler(int error_code) */
655 SWITCH_TO_KERNEL_STACK
656 SAVE_ALL
1da177e4
LT		 657 ldi r1, #0x20 ; error_code
658 mv r0, sp ; pt_regs
659 bl do_rie_handler
660 bra error_code
661
662ENTRY(pie_handler)
663/* void pie_handler(int error_code) */
664 SWITCH_TO_KERNEL_STACK
665 SAVE_ALL
666 ldi r1, #0 ; error_code ; FIXME
667 mv r0, sp ; pt_regs
668 bl do_pie_handler
669 bra error_code
670
671ENTRY(debug_trap)
672 .global withdraw_debug_trap
673 /* void debug_trap(void) */
674 SWITCH_TO_KERNEL_STACK
675 SAVE_ALL
676 mv r0, sp ; pt_regs
677 bl withdraw_debug_trap
678 ldi r1, #0 ; error_code
679 mv r0, sp ; pt_regs
680 bl do_debug_trap
681 bra error_code
682
9de11aab
HT		 683ENTRY(ill_trap)
684 /* void ill_trap(void) */
685 SWITCH_TO_KERNEL_STACK
686 SAVE_ALL
687 ldi r1, #0 ; error_code ; FIXME
688 mv r0, sp ; pt_regs
689 bl do_ill_trap
690 bra error_code
691
1da177e4
LT		 692
693/* Cache flushing handler */
694ENTRY(cache_flushing_handler)
695 .global _flush_cache_all
696 /* void _flush_cache_all(void); */
697 SWITCH_TO_KERNEL_STACK
698 push r0
699 push r1
700 push r2
701 push r3
702 push r4
703 push r5
704 push r6
705 push r7
706 push lr
707 bl _flush_cache_all
708 pop lr
709 pop r7
710 pop r6
711 pop r5
712 pop r4
713 pop r3
714 pop r2
715 pop r1
716 pop r0
717 rte
718
719.data
720ENTRY(sys_call_table)
721 .long sys_restart_syscall /* 0 - old "setup()" system call*/
722 .long sys_exit
723 .long sys_fork
724 .long sys_read
725 .long sys_write
726 .long sys_open /* 5 */
727 .long sys_close
728 .long sys_waitpid
729 .long sys_creat
730 .long sys_link
731 .long sys_unlink /* 10 */
732 .long sys_execve
733 .long sys_chdir
734 .long sys_time
735 .long sys_mknod
736 .long sys_chmod /* 15 */
737 .long sys_ni_syscall /* lchown16 syscall holder */
738 .long sys_ni_syscall /* old break syscall holder */
739 .long sys_ni_syscall /* old stat syscall holder */
740 .long sys_lseek
741 .long sys_getpid /* 20 */
742 .long sys_mount
743 .long sys_oldumount
744 .long sys_ni_syscall /* setuid16 syscall holder */
745 .long sys_ni_syscall /* getuid16 syscall holder */
746 .long sys_stime /* 25 */
747 .long sys_ptrace
748 .long sys_alarm
749 .long sys_ni_syscall /* old fstat syscall holder */
750 .long sys_pause
751 .long sys_utime /* 30 */
752 .long sys_ni_syscall /* old stty syscall holder */
753 .long sys_cachectl /* for M32R */ /* old gtty syscall holder */
754 .long sys_access
755 .long sys_ni_syscall /* nice syscall holder */
756 .long sys_ni_syscall /* 35 - old ftime syscall holder */
757 .long sys_sync
758 .long sys_kill
759 .long sys_rename
760 .long sys_mkdir
761 .long sys_rmdir /* 40 */
762 .long sys_dup
763 .long sys_pipe
764 .long sys_times
765 .long sys_ni_syscall /* old prof syscall holder */
766 .long sys_brk /* 45 */
767 .long sys_ni_syscall /* setgid16 syscall holder */
768 .long sys_getgid /* will be unused */
769 .long sys_ni_syscall /* signal syscall holder */
770 .long sys_ni_syscall /* geteuid16 syscall holder */
771 .long sys_ni_syscall /* 50 - getegid16 syscall holder */
772 .long sys_acct
773 .long sys_umount /* recycled never used phys() */
774 .long sys_ni_syscall /* old lock syscall holder */
775 .long sys_ioctl
776 .long sys_fcntl /* 55 - will be unused */
777 .long sys_ni_syscall /* mpx syscall holder */
778 .long sys_setpgid
779 .long sys_ni_syscall /* old ulimit syscall holder */
780 .long sys_ni_syscall /* sys_olduname */
781 .long sys_umask /* 60 */
782 .long sys_chroot
783 .long sys_ustat
784 .long sys_dup2
785 .long sys_getppid
786 .long sys_getpgrp /* 65 */
787 .long sys_setsid
788 .long sys_ni_syscall /* sigaction syscall holder */
789 .long sys_ni_syscall /* sgetmask syscall holder */
790 .long sys_ni_syscall /* ssetmask syscall holder */
791 .long sys_ni_syscall /* 70 - setreuid16 syscall holder */
792 .long sys_ni_syscall /* setregid16 syscall holder */
793 .long sys_ni_syscall /* sigsuspend syscall holder */
794 .long sys_ni_syscall /* sigpending syscall holder */
795 .long sys_sethostname
796 .long sys_setrlimit /* 75 */
797 .long sys_getrlimit/*will be unused*/
798 .long sys_getrusage
799 .long sys_gettimeofday
800 .long sys_settimeofday
801 .long sys_ni_syscall /* 80 - getgroups16 syscall holder */
802 .long sys_ni_syscall /* setgroups16 syscall holder */
803 .long sys_ni_syscall /* sys_oldselect */
804 .long sys_symlink
805 .long sys_ni_syscall /* old lstat syscall holder */
806 .long sys_readlink /* 85 */
807 .long sys_uselib
808 .long sys_swapon
809 .long sys_reboot
810 .long sys_ni_syscall /* readdir syscall holder */
811 .long sys_ni_syscall /* 90 - old_mmap syscall holder */
812 .long sys_munmap
813 .long sys_truncate
814 .long sys_ftruncate
815 .long sys_fchmod
816 .long sys_ni_syscall /* 95 - fchwon16 syscall holder */
817 .long sys_getpriority
818 .long sys_setpriority
819 .long sys_ni_syscall /* old profil syscall holder */
820 .long sys_statfs
821 .long sys_fstatfs /* 100 */
822 .long sys_ni_syscall /* ioperm syscall holder */
823 .long sys_socketcall
824 .long sys_syslog
825 .long sys_setitimer
826 .long sys_getitimer /* 105 */
827 .long sys_newstat
828 .long sys_newlstat
829 .long sys_newfstat
830 .long sys_ni_syscall /* old uname syscall holder */
831 .long sys_ni_syscall /* 110 - iopl syscall holder */
832 .long sys_vhangup
833 .long sys_ni_syscall /* idle syscall holder */
834 .long sys_ni_syscall /* vm86old syscall holder */
835 .long sys_wait4
836 .long sys_swapoff /* 115 */
837 .long sys_sysinfo
838 .long sys_ipc
839 .long sys_fsync
840 .long sys_ni_syscall /* sigreturn syscall holder */
841 .long sys_clone /* 120 */
842 .long sys_setdomainname
843 .long sys_newuname
844 .long sys_ni_syscall /* modify_ldt syscall holder */
845 .long sys_adjtimex
846 .long sys_mprotect /* 125 */
847 .long sys_ni_syscall /* sigprocmask syscall holder */
848 .long sys_ni_syscall /* create_module syscall holder */
849 .long sys_init_module
850 .long sys_delete_module
851 .long sys_ni_syscall /* 130 - get_kernel_syms */
852 .long sys_quotactl
853 .long sys_getpgid
854 .long sys_fchdir
855 .long sys_bdflush
856 .long sys_sysfs /* 135 */
857 .long sys_personality
858 .long sys_ni_syscall /* afs_syscall syscall holder */
859 .long sys_ni_syscall /* setfsuid16 syscall holder */
860 .long sys_ni_syscall /* setfsgid16 syscall holder */
861 .long sys_llseek /* 140 */
862 .long sys_getdents
863 .long sys_select
864 .long sys_flock
865 .long sys_msync
866 .long sys_readv /* 145 */
867 .long sys_writev
868 .long sys_getsid
869 .long sys_fdatasync
870 .long sys_sysctl
871 .long sys_mlock /* 150 */
872 .long sys_munlock
873 .long sys_mlockall
874 .long sys_munlockall
875 .long sys_sched_setparam
876 .long sys_sched_getparam /* 155 */
877 .long sys_sched_setscheduler
878 .long sys_sched_getscheduler
879 .long sys_sched_yield
880 .long sys_sched_get_priority_max
881 .long sys_sched_get_priority_min /* 160 */
882 .long sys_sched_rr_get_interval
883 .long sys_nanosleep
884 .long sys_mremap
885 .long sys_ni_syscall /* setresuid16 syscall holder */
886 .long sys_ni_syscall /* 165 - getresuid16 syscall holder */
887 .long sys_tas /* vm86 syscall holder */
888 .long sys_ni_syscall /* query_module syscall holder */
889 .long sys_poll
890 .long sys_nfsservctl
891 .long sys_setresgid /* 170 */
892 .long sys_getresgid
893 .long sys_prctl
894 .long sys_rt_sigreturn
895 .long sys_rt_sigaction
896 .long sys_rt_sigprocmask /* 175 */
897 .long sys_rt_sigpending
898 .long sys_rt_sigtimedwait
899 .long sys_rt_sigqueueinfo
900 .long sys_rt_sigsuspend
901 .long sys_pread64 /* 180 */
902 .long sys_pwrite64
903 .long sys_ni_syscall /* chown16 syscall holder */
904 .long sys_getcwd
905 .long sys_capget
906 .long sys_capset /* 185 */
907 .long sys_sigaltstack
908 .long sys_sendfile
909 .long sys_ni_syscall /* streams1 */
910 .long sys_ni_syscall /* streams2 */
911 .long sys_vfork /* 190 */
912 .long sys_getrlimit
913 .long sys_mmap2
914 .long sys_truncate64
915 .long sys_ftruncate64
916 .long sys_stat64 /* 195 */
917 .long sys_lstat64
918 .long sys_fstat64
919 .long sys_lchown
920 .long sys_getuid
921 .long sys_getgid /* 200 */
922 .long sys_geteuid
923 .long sys_getegid
924 .long sys_setreuid
925 .long sys_setregid
926 .long sys_getgroups /* 205 */
927 .long sys_setgroups
928 .long sys_fchown
929 .long sys_setresuid
930 .long sys_getresuid
931 .long sys_setresgid /* 210 */
932 .long sys_getresgid
933 .long sys_chown
934 .long sys_setuid
935 .long sys_setgid
936 .long sys_setfsuid /* 215 */
937 .long sys_setfsgid
938 .long sys_pivot_root
939 .long sys_mincore
940 .long sys_madvise
941 .long sys_getdents64 /* 220 */
942 .long sys_fcntl64
943 .long sys_ni_syscall /* reserved for TUX */
944 .long sys_ni_syscall /* Reserved for Security */
945 .long sys_gettid
946 .long sys_readahead /* 225 */
947 .long sys_setxattr
948 .long sys_lsetxattr
949 .long sys_fsetxattr
950 .long sys_getxattr
951 .long sys_lgetxattr /* 230 */
952 .long sys_fgetxattr
953 .long sys_listxattr
954 .long sys_llistxattr
955 .long sys_flistxattr
956 .long sys_removexattr /* 235 */
957 .long sys_lremovexattr
958 .long sys_fremovexattr
959 .long sys_tkill
960 .long sys_sendfile64
961 .long sys_futex /* 240 */
962 .long sys_sched_setaffinity
963 .long sys_sched_getaffinity
964 .long sys_ni_syscall /* reserved for "set_thread_area" system call */
965 .long sys_ni_syscall /* reserved for "get_thread_area" system call */
966 .long sys_io_setup /* 245 */
967 .long sys_io_destroy
968 .long sys_io_getevents
969 .long sys_io_submit
970 .long sys_io_cancel
971 .long sys_fadvise64 /* 250 */
972 .long sys_ni_syscall
973 .long sys_exit_group
974 .long sys_lookup_dcookie
975 .long sys_epoll_create
976 .long sys_epoll_ctl /* 255 */
977 .long sys_epoll_wait
978 .long sys_remap_file_pages
979 .long sys_set_tid_address
980 .long sys_timer_create
981 .long sys_timer_settime /* 260 */
982 .long sys_timer_gettime
983 .long sys_timer_getoverrun
984 .long sys_timer_delete
985 .long sys_clock_settime
986 .long sys_clock_gettime /* 265 */
987 .long sys_clock_getres
988 .long sys_clock_nanosleep
989 .long sys_statfs64
990 .long sys_fstatfs64
991 .long sys_tgkill /* 270 */
992 .long sys_utimes
993 .long sys_fadvise64_64
994 .long sys_ni_syscall /* Reserved for sys_vserver */
995 .long sys_ni_syscall /* Reserved for sys_mbind */
996 .long sys_ni_syscall /* Reserved for sys_get_mempolicy */
997 .long sys_ni_syscall /* Reserved for sys_set_mempolicy */
998 .long sys_mq_open
999 .long sys_mq_unlink
1000 .long sys_mq_timedsend
1001 .long sys_mq_timedreceive /* 280 */
1002 .long sys_mq_notify
1003 .long sys_mq_getsetattr
1004 .long sys_ni_syscall /* reserved for kexec */
1005 .long sys_waitid
1006
1007syscall_table_size=(.-sys_call_table)
Clone of davem's net-next-2.6 tree