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Linux-2.6.12-rc2
[GitHub/LineageOS/android_kernel_samsung_universal7580.git] / arch / m32r / kernel / entry.S
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
23 * updated in fork.c:copy_process, signal.c:do_signal,
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
44 * @(0x44,sp) - acc1h @(0x44,sp) - psw
45 * @(0x48,sp) - acc1l @(0x48,sp) - bpc
46 * @(0x4c,sp) - psw @(0x4c,sp) - bbpsw
47 * @(0x50,sp) - bpc @(0x50,sp) - bbpc
48 * @(0x54,sp) - bbpsw @(0x54,sp) - spu (cr3)
49 * @(0x58,sp) - bbpc @(0x58,sp) - fp (r13)
50 * @(0x5c,sp) - spu (cr3) @(0x5c,sp) - lr (r14)
51 * @(0x60,sp) - fp (r13) @(0x60,sp) - spi (cr12)
52 * @(0x64,sp) - lr (r14) @(0x64,sp) - orig_r0
53 * @(0x68,sp) - spi (cr2)
54 * @(0x6c,sp) - orig_r0
55 *
56 */
57
58 #include <linux/config.h>
59 #include <linux/linkage.h>
60 #include <asm/irq.h>
61 #include <asm/unistd.h>
62 #include <asm/assembler.h>
63 #include <asm/thread_info.h>
64 #include <asm/errno.h>
65 #include <asm/segment.h>
66 #include <asm/smp.h>
67 #include <asm/page.h>
68 #include <asm/m32r.h>
69 #include <asm/mmu_context.h>
70
71 #if !defined(CONFIG_MMU)
72 #define sys_madvise sys_ni_syscall
73 #define sys_readahead sys_ni_syscall
74 #define sys_mprotect sys_ni_syscall
75 #define sys_msync sys_ni_syscall
76 #define sys_mlock sys_ni_syscall
77 #define sys_munlock sys_ni_syscall
78 #define sys_mlockall sys_ni_syscall
79 #define sys_munlockall sys_ni_syscall
80 #define sys_mremap sys_ni_syscall
81 #define sys_mincore sys_ni_syscall
82 #define sys_remap_file_pages sys_ni_syscall
83 #endif /* CONFIG_MMU */
84
85 #define R4(reg) @reg
86 #define R5(reg) @(0x04,reg)
87 #define R6(reg) @(0x08,reg)
88 #define PTREGS(reg) @(0x0C,reg)
89 #define R0(reg) @(0x10,reg)
90 #define R1(reg) @(0x14,reg)
91 #define R2(reg) @(0x18,reg)
92 #define R3(reg) @(0x1C,reg)
93 #define R7(reg) @(0x20,reg)
94 #define R8(reg) @(0x24,reg)
95 #define R9(reg) @(0x28,reg)
96 #define R10(reg) @(0x2C,reg)
97 #define R11(reg) @(0x30,reg)
98 #define R12(reg) @(0x34,reg)
99 #define SYSCALL_NR(reg) @(0x38,reg)
100 #if defined(CONFIG_ISA_M32R2) && defined(CONFIG_ISA_DSP_LEVEL2)
101 #define ACC0H(reg) @(0x3C,reg)
102 #define ACC0L(reg) @(0x40,reg)
103 #define ACC1H(reg) @(0x44,reg)
104 #define ACC1L(reg) @(0x48,reg)
105 #define PSW(reg) @(0x4C,reg)
106 #define BPC(reg) @(0x50,reg)
107 #define BBPSW(reg) @(0x54,reg)
108 #define BBPC(reg) @(0x58,reg)
109 #define SPU(reg) @(0x5C,reg)
110 #define FP(reg) @(0x60,reg) /* FP = R13 */
111 #define LR(reg) @(0x64,reg)
112 #define SP(reg) @(0x68,reg)
113 #define ORIG_R0(reg) @(0x6C,reg)
114 #elif defined(CONFIG_ISA_M32R2) || defined(CONFIG_ISA_M32R)
115 #define ACCH(reg) @(0x3C,reg)
116 #define ACCL(reg) @(0x40,reg)
117 #define PSW(reg) @(0x44,reg)
118 #define BPC(reg) @(0x48,reg)
119 #define BBPSW(reg) @(0x4C,reg)
120 #define BBPC(reg) @(0x50,reg)
121 #define SPU(reg) @(0x54,reg)
122 #define FP(reg) @(0x58,reg) /* FP = R13 */
123 #define LR(reg) @(0x5C,reg)
124 #define SP(reg) @(0x60,reg)
125 #define ORIG_R0(reg) @(0x64,reg)
126 #else
127 #error unknown isa configuration
128 #endif
129
130 CF_MASK = 0x00000001
131 TF_MASK = 0x00000100
132 IF_MASK = 0x00000200
133 DF_MASK = 0x00000400
134 NT_MASK = 0x00004000
135 VM_MASK = 0x00020000
136
137 #ifdef CONFIG_PREEMPT
138 #define preempt_stop(x) CLI(x)
139 #else
140 #define preempt_stop(x)
141 #define resume_kernel restore_all
142 #endif
143
144 ENTRY(ret_from_fork)
145 ld r0, @sp+
146 bl schedule_tail
147 GET_THREAD_INFO(r8)
148 bra syscall_exit
149
150 /*
151 * Return to user mode is not as complex as all this looks,
152 * but we want the default path for a system call return to
153 * go as quickly as possible which is why some of this is
154 * less clear than it otherwise should be.
155 */
156
157 ; userspace resumption stub bypassing syscall exit tracing
158 ALIGN
159 ret_from_exception:
160 preempt_stop(r4)
161 ret_from_intr:
162 ld r4, PSW(sp)
163 #ifdef CONFIG_ISA_M32R2
164 and3 r4, r4, #0x8800 ; check BSM and BPM bits
165 #else
166 and3 r4, r4, #0x8000 ; check BSM bit
167 #endif
168 beqz r4, resume_kernel
169 ENTRY(resume_userspace)
170 CLI(r4) ; make sure we don't miss an interrupt
171 ; setting need_resched or sigpending
172 ; between sampling and the iret
173 GET_THREAD_INFO(r8)
174 ld r9, @(TI_FLAGS, r8)
175 and3 r4, r9, #_TIF_WORK_MASK ; is there any work to be done on
176 ; int/exception return?
177 bnez r4, work_pending
178 bra restore_all
179
180 #ifdef CONFIG_PREEMPT
181 ENTRY(resume_kernel)
182 GET_THREAD_INFO(r8)
183 ld r9, @(TI_PRE_COUNT, r8) ; non-zero preempt_count ?
184 bnez r9, restore_all
185 need_resched:
186 ld r9, @(TI_FLAGS, r8) ; need_resched set ?
187 and3 r4, r9, #_TIF_NEED_RESCHED
188 beqz r4, restore_all
189 ld r4, PSW(sp) ; interrupts off (exception path) ?
190 and3 r4, r4, #0x4000
191 beqz r4, restore_all
192 LDIMM (r4, PREEMPT_ACTIVE)
193 st r4, @(TI_PRE_COUNT, r8)
194 STI(r4)
195 bl schedule
196 ldi r4, #0
197 st r4, @(TI_PRE_COUNT, r8)
198 CLI(r4)
199 bra need_resched
200 #endif
201
202 ; system call handler stub
203 ENTRY(system_call)
204 SWITCH_TO_KERNEL_STACK
205 SAVE_ALL
206 STI(r4) ; Enable interrupt
207 st sp, PTREGS(sp) ; implicit pt_regs parameter
208 cmpui r7, #NR_syscalls
209 bnc syscall_badsys
210 st r7, SYSCALL_NR(sp) ; syscall_nr
211 ; system call tracing in operation
212 GET_THREAD_INFO(r8)
213 ld r9, @(TI_FLAGS, r8)
214 and3 r4, r9, #_TIF_SYSCALL_TRACE
215 bnez r4, syscall_trace_entry
216 syscall_call:
217 slli r7, #2 ; table jump for the system call
218 LDIMM (r4, sys_call_table)
219 add r7, r4
220 ld r7, @r7
221 jl r7 ; execute system call
222 st r0, R0(sp) ; save the return value
223 syscall_exit:
224 CLI(r4) ; make sure we don't miss an interrupt
225 ; setting need_resched or sigpending
226 ; between sampling and the iret
227 ld r9, @(TI_FLAGS, r8)
228 and3 r4, r9, #_TIF_ALLWORK_MASK ; current->work
229 bnez r4, syscall_exit_work
230 restore_all:
231 RESTORE_ALL
232
233 # perform work that needs to be done immediately before resumption
234 # r9 : frags
235 ALIGN
236 work_pending:
237 and3 r4, r9, #_TIF_NEED_RESCHED
238 beqz r4, work_notifysig
239 work_resched:
240 bl schedule
241 CLI(r4) ; make sure we don't miss an interrupt
242 ; setting need_resched or sigpending
243 ; between sampling and the iret
244 ld r9, @(TI_FLAGS, r8)
245 and3 r4, r9, #_TIF_WORK_MASK ; is there any work to be done other
246 ; than syscall tracing?
247 beqz r4, restore_all
248 and3 r4, r4, #_TIF_NEED_RESCHED
249 bnez r4, work_resched
250
251 work_notifysig: ; deal with pending signals and
252 ; notify-resume requests
253 mv r0, sp ; arg1 : struct pt_regs *regs
254 ldi r1, #0 ; arg2 : sigset_t *oldset
255 mv r2, r9 ; arg3 : __u32 thread_info_flags
256 bl do_notify_resume
257 bra restore_all
258
259 ; perform syscall exit tracing
260 ALIGN
261 syscall_trace_entry:
262 ldi r4, #-ENOSYS
263 st r4, R0(sp)
264 bl do_syscall_trace
265 ld r0, ORIG_R0(sp)
266 ld r1, R1(sp)
267 ld r2, R2(sp)
268 ld r3, R3(sp)
269 ld r4, R4(sp)
270 ld r5, R5(sp)
271 ld r6, R6(sp)
272 ld r7, SYSCALL_NR(sp)
273 cmpui r7, #NR_syscalls
274 bc syscall_call
275 bra syscall_exit
276
277 ; perform syscall exit tracing
278 ALIGN
279 syscall_exit_work:
280 ld r9, @(TI_FLAGS, r8)
281 and3 r4, r9, #_TIF_SYSCALL_TRACE
282 beqz r4, work_pending
283 STI(r4) ; could let do_syscall_trace() call
284 ; schedule() instead
285 bl do_syscall_trace
286 bra resume_userspace
287
288 ALIGN
289 syscall_fault:
290 SAVE_ALL
291 GET_THREAD_INFO(r8)
292 ldi r4, #-EFAULT
293 st r4, R0(sp)
294 bra resume_userspace
295
296 ALIGN
297 syscall_badsys:
298 ldi r4, #-ENOSYS
299 st r4, R0(sp)
300 bra resume_userspace
301
302 .global eit_vector
303
304 .equ ei_vec_table, eit_vector + 0x0200
305
306 /*
307 * EI handler routine
308 */
309 ENTRY(ei_handler)
310 #if defined(CONFIG_CHIP_M32700)
311 SWITCH_TO_KERNEL_STACK
312 ; WORKAROUND: force to clear SM bit and use the kernel stack (SPI).
313 #endif
314 SAVE_ALL
315 mv r1, sp ; arg1(regs)
316 #if defined(CONFIG_CHIP_VDEC2) || defined(CONFIG_CHIP_XNUX2) \
317 || defined(CONFIG_CHIP_M32700) || defined(CONFIG_CHIP_M32102) \
318 || defined(CONFIG_CHIP_OPSP)
319
320 ; GET_ICU_STATUS;
321 seth r0, #shigh(M32R_ICU_ISTS_ADDR)
322 ld r0, @(low(M32R_ICU_ISTS_ADDR),r0)
323 st r0, @-sp
324 #if defined(CONFIG_SMP)
325 /*
326 * If IRQ == 0 --> Nothing to do, Not write IMASK
327 * If IRQ == IPI --> Do IPI handler, Not write IMASK
328 * If IRQ != 0, IPI --> Do do_IRQ(), Write IMASK
329 */
330 slli r0, #4
331 srli r0, #24 ; r0(irq_num<<2)
332 ;; IRQ exist check
333 #if defined(CONFIG_CHIP_M32700)
334 /* WORKAROUND: IMASK bug M32700-TS1, TS2 chip. */
335 beqz r0, 3f ; if (!irq_num) goto exit
336 #else
337 beqz r0, 1f ; if (!irq_num) goto exit
338 #endif /* WORKAROUND */
339 ;; IPI check
340 cmpi r0, #(M32R_IRQ_IPI0<<2) ; ISN < IPI0 check
341 bc 2f
342 cmpi r0, #((M32R_IRQ_IPI7+1)<<2) ; ISN > IPI7 check
343 bnc 2f
344 LDIMM (r2, ei_vec_table)
345 add r2, r0
346 ld r2, @r2
347 beqz r2, 1f ; if (no IPI handler) goto exit
348 mv r0, r1 ; arg0(regs)
349 jl r2
350 .fillinsn
351 1:
352 addi sp, #4
353 bra ret_to_intr
354 #if defined(CONFIG_CHIP_M32700)
355 /* WORKAROUND: IMASK bug M32700-TS1, TS2 chip. */
356 .fillinsn
357 3:
358 ld24 r14, #0x00070000
359 seth r0, #shigh(M32R_ICU_IMASK_ADDR)
360 st r14, @(low(M32R_ICU_IMASK_ADDR), r0)
361 addi sp, #4
362 bra ret_to_intr
363 #endif /* WORKAROUND */
364 ;; do_IRQ
365 .fillinsn
366 2:
367 srli r0, #2
368 #if defined(CONFIG_PLAT_USRV)
369 add3 r2, r0, #-(M32R_IRQ_INT1) ; INT1# interrupt
370 bnez r2, 9f
371 ; read ICU status register of PLD
372 seth r0, #high(PLD_ICUISTS)
373 or3 r0, r0, #low(PLD_ICUISTS)
374 lduh r0, @r0
375 slli r0, #21
376 srli r0, #27 ; ISN
377 addi r0, #(M32700UT_PLD_IRQ_BASE)
378 .fillinsn
379 9:
380 #elif defined(CONFIG_PLAT_M32700UT)
381 add3 r2, r0, #-(M32R_IRQ_INT1) ; INT1# interrupt
382 bnez r2, check_int0
383 ; read ICU status register of PLD
384 seth r0, #high(PLD_ICUISTS)
385 or3 r0, r0, #low(PLD_ICUISTS)
386 lduh r0, @r0
387 slli r0, #21
388 srli r0, #27 ; ISN
389 addi r0, #(M32700UT_PLD_IRQ_BASE)
390 bra check_end
391 .fillinsn
392 check_int0:
393 add3 r2, r0, #-(M32R_IRQ_INT0) ; INT0# interrupt
394 bnez r2, check_int2
395 ; read ICU status of LAN-board
396 seth r0, #high(M32700UT_LAN_ICUISTS)
397 or3 r0, r0, #low(M32700UT_LAN_ICUISTS)
398 lduh r0, @r0
399 slli r0, #21
400 srli r0, #27 ; ISN
401 add3 r0, r0, #(M32700UT_LAN_PLD_IRQ_BASE)
402 bra check_end
403 .fillinsn
404 check_int2:
405 add3 r2, r0, #-(M32R_IRQ_INT2) ; INT2# interrupt
406 bnez r2, check_end
407 ; read ICU status of LCD-board
408 seth r0, #high(M32700UT_LCD_ICUISTS)
409 or3 r0, r0, #low(M32700UT_LCD_ICUISTS)
410 lduh r0, @r0
411 slli r0, #21
412 srli r0, #27 ; ISN
413 add3 r0, r0, #(M32700UT_LCD_PLD_IRQ_BASE)
414 bra check_end
415 .fillinsn
416 check_end:
417 #elif defined(CONFIG_PLAT_OPSPUT)
418 add3 r2, r0, #-(M32R_IRQ_INT1) ; INT1# interrupt
419 bnez r2, check_int0
420 ; read ICU status register of PLD
421 seth r0, #high(PLD_ICUISTS)
422 or3 r0, r0, #low(PLD_ICUISTS)
423 lduh r0, @r0
424 slli r0, #21
425 srli r0, #27 ; ISN
426 addi r0, #(OPSPUT_PLD_IRQ_BASE)
427 bra check_end
428 .fillinsn
429 check_int0:
430 add3 r2, r0, #-(M32R_IRQ_INT0) ; INT0# interrupt
431 bnez r2, check_int2
432 ; read ICU status of LAN-board
433 seth r0, #high(OPSPUT_LAN_ICUISTS)
434 or3 r0, r0, #low(OPSPUT_LAN_ICUISTS)
435 lduh r0, @r0
436 slli r0, #21
437 srli r0, #27 ; ISN
438 add3 r0, r0, #(OPSPUT_LAN_PLD_IRQ_BASE)
439 bra check_end
440 .fillinsn
441 check_int2:
442 add3 r2, r0, #-(M32R_IRQ_INT2) ; INT2# interrupt
443 bnez r2, check_end
444 ; read ICU status of LCD-board
445 seth r0, #high(OPSPUT_LCD_ICUISTS)
446 or3 r0, r0, #low(OPSPUT_LCD_ICUISTS)
447 lduh r0, @r0
448 slli r0, #21
449 srli r0, #27 ; ISN
450 add3 r0, r0, #(OPSPUT_LCD_PLD_IRQ_BASE)
451 bra check_end
452 .fillinsn
453 check_end:
454 #endif /* CONFIG_PLAT_OPSPUT */
455 bl do_IRQ ; r0(irq), r1(regs)
456 #else /* not CONFIG_SMP */
457 srli r0, #22 ; r0(irq)
458 #if defined(CONFIG_PLAT_USRV)
459 add3 r2, r0, #-(M32R_IRQ_INT1) ; INT1# interrupt
460 bnez r2, 1f
461 ; read ICU status register of PLD
462 seth r0, #high(PLD_ICUISTS)
463 or3 r0, r0, #low(PLD_ICUISTS)
464 lduh r0, @r0
465 slli r0, #21
466 srli r0, #27 ; ISN
467 addi r0, #(M32700UT_PLD_IRQ_BASE)
468 .fillinsn
469 1:
470 #elif defined(CONFIG_PLAT_M32700UT)
471 add3 r2, r0, #-(M32R_IRQ_INT1) ; INT1# interrupt
472 bnez r2, check_int0
473 ; read ICU status register of PLD
474 seth r0, #high(PLD_ICUISTS)
475 or3 r0, r0, #low(PLD_ICUISTS)
476 lduh r0, @r0
477 slli r0, #21
478 srli r0, #27 ; ISN
479 addi r0, #(M32700UT_PLD_IRQ_BASE)
480 bra check_end
481 .fillinsn
482 check_int0:
483 add3 r2, r0, #-(M32R_IRQ_INT0) ; INT0# interrupt
484 bnez r2, check_int2
485 ; read ICU status of LAN-board
486 seth r0, #high(M32700UT_LAN_ICUISTS)
487 or3 r0, r0, #low(M32700UT_LAN_ICUISTS)
488 lduh r0, @r0
489 slli r0, #21
490 srli r0, #27 ; ISN
491 add3 r0, r0, #(M32700UT_LAN_PLD_IRQ_BASE)
492 bra check_end
493 .fillinsn
494 check_int2:
495 add3 r2, r0, #-(M32R_IRQ_INT2) ; INT2# interrupt
496 bnez r2, check_end
497 ; read ICU status of LCD-board
498 seth r0, #high(M32700UT_LCD_ICUISTS)
499 or3 r0, r0, #low(M32700UT_LCD_ICUISTS)
500 lduh r0, @r0
501 slli r0, #21
502 srli r0, #27 ; ISN
503 add3 r0, r0, #(M32700UT_LCD_PLD_IRQ_BASE)
504 bra check_end
505 .fillinsn
506 check_end:
507 #elif defined(CONFIG_PLAT_OPSPUT)
508 add3 r2, r0, #-(M32R_IRQ_INT1) ; INT1# interrupt
509 bnez r2, check_int0
510 ; read ICU status register of PLD
511 seth r0, #high(PLD_ICUISTS)
512 or3 r0, r0, #low(PLD_ICUISTS)
513 lduh r0, @r0
514 slli r0, #21
515 srli r0, #27 ; ISN
516 addi r0, #(OPSPUT_PLD_IRQ_BASE)
517 bra check_end
518 .fillinsn
519 check_int0:
520 add3 r2, r0, #-(M32R_IRQ_INT0) ; INT0# interrupt
521 bnez r2, check_int2
522 ; read ICU status of LAN-board
523 seth r0, #high(OPSPUT_LAN_ICUISTS)
524 or3 r0, r0, #low(OPSPUT_LAN_ICUISTS)
525 lduh r0, @r0
526 slli r0, #21
527 srli r0, #27 ; ISN
528 add3 r0, r0, #(OPSPUT_LAN_PLD_IRQ_BASE)
529 bra check_end
530 .fillinsn
531 check_int2:
532 add3 r2, r0, #-(M32R_IRQ_INT2) ; INT2# interrupt
533 bnez r2, check_end
534 ; read ICU status of LCD-board
535 seth r0, #high(OPSPUT_LCD_ICUISTS)
536 or3 r0, r0, #low(OPSPUT_LCD_ICUISTS)
537 lduh r0, @r0
538 slli r0, #21
539 srli r0, #27 ; ISN
540 add3 r0, r0, #(OPSPUT_LCD_PLD_IRQ_BASE)
541 bra check_end
542 .fillinsn
543 check_end:
544 #endif /* CONFIG_PLAT_OPSPUT */
545 bl do_IRQ
546 #endif /* CONFIG_SMP */
547 ld r14, @sp+
548 seth r0, #shigh(M32R_ICU_IMASK_ADDR)
549 st r14, @(low(M32R_ICU_IMASK_ADDR),r0)
550 #else
551 #error no chip configuration
552 #endif
553 ret_to_intr:
554 bra ret_from_intr
555
556 /*
557 * Default EIT handler
558 */
559 ALIGN
560 int_msg:
561 .asciz "Unknown interrupt\n"
562 .byte 0
563
564 ENTRY(default_eit_handler)
565 push r0
566 mvfc r0, psw
567 push r1
568 push r2
569 push r3
570 push r0
571 LDIMM (r0, __KERNEL_DS)
572 mv r0, r1
573 mv r0, r2
574 LDIMM (r0, int_msg)
575 bl printk
576 pop r0
577 pop r3
578 pop r2
579 pop r1
580 mvtc r0, psw
581 pop r0
582 infinit:
583 bra infinit
584
585 #ifdef CONFIG_MMU
586 /*
587 * Access Exception handler
588 */
589 ENTRY(ace_handler)
590 SWITCH_TO_KERNEL_STACK
591 SAVE_ALL
592
593 seth r2, #shigh(MMU_REG_BASE) /* Check status register */
594 ld r4, @(low(MESTS_offset),r2)
595 st r4, @(low(MESTS_offset),r2)
596 srl3 r1, r4, #4
597 #ifdef CONFIG_CHIP_M32700
598 and3 r1, r1, #0x0000ffff
599 ; WORKAROUND: ignore TME bit for the M32700(TS1).
600 #endif /* CONFIG_CHIP_M32700 */
601 beqz r1, inst
602 oprand:
603 ld r2, @(low(MDEVA_offset),r2) ; set address
604 srli r2, #12
605 slli r2, #12
606 srli r1, #1
607 bra 1f
608 inst:
609 and3 r1, r4, #2
610 srli r1, #1
611 or3 r1, r1, #8
612 mvfc r2, bpc ; set address
613 .fillinsn
614 1:
615 mvfc r3, psw
616 mv r0, sp
617 and3 r3, r3, 0x800
618 srli r3, #9
619 or r1, r3
620 /*
621 * do_page_fault():
622 * r0 : struct pt_regs *regs
623 * r1 : unsigned long error-code
624 * r2 : unsigned long address
625 * error-code:
626 * +------+------+------+------+
627 * | bit3 | bit2 | bit1 | bit0 |
628 * +------+------+------+------+
629 * bit 3 == 0:means data, 1:means instruction
630 * bit 2 == 0:means kernel, 1:means user-mode
631 * bit 1 == 0:means read, 1:means write
632 * bit 0 == 0:means no page found 1:means protection fault
633 *
634 */
635 bl do_page_fault
636 bra ret_from_intr
637 #endif /* CONFIG_MMU */
638
639
640 ENTRY(alignment_check)
641 /* void alignment_check(int error_code) */
642 SWITCH_TO_KERNEL_STACK
643 SAVE_ALL
644 ldi r1, #0x30 ; error_code
645 mv r0, sp ; pt_regs
646 bl do_alignment_check
647 error_code:
648 bra ret_from_exception
649
650 ENTRY(rie_handler)
651 /* void rie_handler(int error_code) */
652 SWITCH_TO_KERNEL_STACK
653 SAVE_ALL
654 mvfc r0, bpc
655 ld r1, @r0
656 seth r0, #0xa0f0
657 st r1, @r0
658 ldi r1, #0x20 ; error_code
659 mv r0, sp ; pt_regs
660 bl do_rie_handler
661 bra error_code
662
663 ENTRY(pie_handler)
664 /* void pie_handler(int error_code) */
665 SWITCH_TO_KERNEL_STACK
666 SAVE_ALL
667 ldi r1, #0 ; error_code ; FIXME
668 mv r0, sp ; pt_regs
669 bl do_pie_handler
670 bra error_code
671
672 ENTRY(debug_trap)
673 .global withdraw_debug_trap
674 /* void debug_trap(void) */
675 SWITCH_TO_KERNEL_STACK
676 SAVE_ALL
677 mv r0, sp ; pt_regs
678 bl withdraw_debug_trap
679 ldi r1, #0 ; error_code
680 mv r0, sp ; pt_regs
681 bl do_debug_trap
682 bra error_code
683
684
685 /* Cache flushing handler */
686 ENTRY(cache_flushing_handler)
687 .global _flush_cache_all
688 /* void _flush_cache_all(void); */
689 SWITCH_TO_KERNEL_STACK
690 push r0
691 push r1
692 push r2
693 push r3
694 push r4
695 push r5
696 push r6
697 push r7
698 push lr
699 bl _flush_cache_all
700 pop lr
701 pop r7
702 pop r6
703 pop r5
704 pop r4
705 pop r3
706 pop r2
707 pop r1
708 pop r0
709 rte
710
711 .data
712 ENTRY(sys_call_table)
713 .long sys_restart_syscall /* 0 - old "setup()" system call*/
714 .long sys_exit
715 .long sys_fork
716 .long sys_read
717 .long sys_write
718 .long sys_open /* 5 */
719 .long sys_close
720 .long sys_waitpid
721 .long sys_creat
722 .long sys_link
723 .long sys_unlink /* 10 */
724 .long sys_execve
725 .long sys_chdir
726 .long sys_time
727 .long sys_mknod
728 .long sys_chmod /* 15 */
729 .long sys_ni_syscall /* lchown16 syscall holder */
730 .long sys_ni_syscall /* old break syscall holder */
731 .long sys_ni_syscall /* old stat syscall holder */
732 .long sys_lseek
733 .long sys_getpid /* 20 */
734 .long sys_mount
735 .long sys_oldumount
736 .long sys_ni_syscall /* setuid16 syscall holder */
737 .long sys_ni_syscall /* getuid16 syscall holder */
738 .long sys_stime /* 25 */
739 .long sys_ptrace
740 .long sys_alarm
741 .long sys_ni_syscall /* old fstat syscall holder */
742 .long sys_pause
743 .long sys_utime /* 30 */
744 .long sys_ni_syscall /* old stty syscall holder */
745 .long sys_cachectl /* for M32R */ /* old gtty syscall holder */
746 .long sys_access
747 .long sys_ni_syscall /* nice syscall holder */
748 .long sys_ni_syscall /* 35 - old ftime syscall holder */
749 .long sys_sync
750 .long sys_kill
751 .long sys_rename
752 .long sys_mkdir
753 .long sys_rmdir /* 40 */
754 .long sys_dup
755 .long sys_pipe
756 .long sys_times
757 .long sys_ni_syscall /* old prof syscall holder */
758 .long sys_brk /* 45 */
759 .long sys_ni_syscall /* setgid16 syscall holder */
760 .long sys_getgid /* will be unused */
761 .long sys_ni_syscall /* signal syscall holder */
762 .long sys_ni_syscall /* geteuid16 syscall holder */
763 .long sys_ni_syscall /* 50 - getegid16 syscall holder */
764 .long sys_acct
765 .long sys_umount /* recycled never used phys() */
766 .long sys_ni_syscall /* old lock syscall holder */
767 .long sys_ioctl
768 .long sys_fcntl /* 55 - will be unused */
769 .long sys_ni_syscall /* mpx syscall holder */
770 .long sys_setpgid
771 .long sys_ni_syscall /* old ulimit syscall holder */
772 .long sys_ni_syscall /* sys_olduname */
773 .long sys_umask /* 60 */
774 .long sys_chroot
775 .long sys_ustat
776 .long sys_dup2
777 .long sys_getppid
778 .long sys_getpgrp /* 65 */
779 .long sys_setsid
780 .long sys_ni_syscall /* sigaction syscall holder */
781 .long sys_ni_syscall /* sgetmask syscall holder */
782 .long sys_ni_syscall /* ssetmask syscall holder */
783 .long sys_ni_syscall /* 70 - setreuid16 syscall holder */
784 .long sys_ni_syscall /* setregid16 syscall holder */
785 .long sys_ni_syscall /* sigsuspend syscall holder */
786 .long sys_ni_syscall /* sigpending syscall holder */
787 .long sys_sethostname
788 .long sys_setrlimit /* 75 */
789 .long sys_getrlimit/*will be unused*/
790 .long sys_getrusage
791 .long sys_gettimeofday
792 .long sys_settimeofday
793 .long sys_ni_syscall /* 80 - getgroups16 syscall holder */
794 .long sys_ni_syscall /* setgroups16 syscall holder */
795 .long sys_ni_syscall /* sys_oldselect */
796 .long sys_symlink
797 .long sys_ni_syscall /* old lstat syscall holder */
798 .long sys_readlink /* 85 */
799 .long sys_uselib
800 .long sys_swapon
801 .long sys_reboot
802 .long sys_ni_syscall /* readdir syscall holder */
803 .long sys_ni_syscall /* 90 - old_mmap syscall holder */
804 .long sys_munmap
805 .long sys_truncate
806 .long sys_ftruncate
807 .long sys_fchmod
808 .long sys_ni_syscall /* 95 - fchwon16 syscall holder */
809 .long sys_getpriority
810 .long sys_setpriority
811 .long sys_ni_syscall /* old profil syscall holder */
812 .long sys_statfs
813 .long sys_fstatfs /* 100 */
814 .long sys_ni_syscall /* ioperm syscall holder */
815 .long sys_socketcall
816 .long sys_syslog
817 .long sys_setitimer
818 .long sys_getitimer /* 105 */
819 .long sys_newstat
820 .long sys_newlstat
821 .long sys_newfstat
822 .long sys_ni_syscall /* old uname syscall holder */
823 .long sys_ni_syscall /* 110 - iopl syscall holder */
824 .long sys_vhangup
825 .long sys_ni_syscall /* idle syscall holder */
826 .long sys_ni_syscall /* vm86old syscall holder */
827 .long sys_wait4
828 .long sys_swapoff /* 115 */
829 .long sys_sysinfo
830 .long sys_ipc
831 .long sys_fsync
832 .long sys_ni_syscall /* sigreturn syscall holder */
833 .long sys_clone /* 120 */
834 .long sys_setdomainname
835 .long sys_newuname
836 .long sys_ni_syscall /* modify_ldt syscall holder */
837 .long sys_adjtimex
838 .long sys_mprotect /* 125 */
839 .long sys_ni_syscall /* sigprocmask syscall holder */
840 .long sys_ni_syscall /* create_module syscall holder */
841 .long sys_init_module
842 .long sys_delete_module
843 .long sys_ni_syscall /* 130 - get_kernel_syms */
844 .long sys_quotactl
845 .long sys_getpgid
846 .long sys_fchdir
847 .long sys_bdflush
848 .long sys_sysfs /* 135 */
849 .long sys_personality
850 .long sys_ni_syscall /* afs_syscall syscall holder */
851 .long sys_ni_syscall /* setfsuid16 syscall holder */
852 .long sys_ni_syscall /* setfsgid16 syscall holder */
853 .long sys_llseek /* 140 */
854 .long sys_getdents
855 .long sys_select
856 .long sys_flock
857 .long sys_msync
858 .long sys_readv /* 145 */
859 .long sys_writev
860 .long sys_getsid
861 .long sys_fdatasync
862 .long sys_sysctl
863 .long sys_mlock /* 150 */
864 .long sys_munlock
865 .long sys_mlockall
866 .long sys_munlockall
867 .long sys_sched_setparam
868 .long sys_sched_getparam /* 155 */
869 .long sys_sched_setscheduler
870 .long sys_sched_getscheduler
871 .long sys_sched_yield
872 .long sys_sched_get_priority_max
873 .long sys_sched_get_priority_min /* 160 */
874 .long sys_sched_rr_get_interval
875 .long sys_nanosleep
876 .long sys_mremap
877 .long sys_ni_syscall /* setresuid16 syscall holder */
878 .long sys_ni_syscall /* 165 - getresuid16 syscall holder */
879 .long sys_tas /* vm86 syscall holder */
880 .long sys_ni_syscall /* query_module syscall holder */
881 .long sys_poll
882 .long sys_nfsservctl
883 .long sys_setresgid /* 170 */
884 .long sys_getresgid
885 .long sys_prctl
886 .long sys_rt_sigreturn
887 .long sys_rt_sigaction
888 .long sys_rt_sigprocmask /* 175 */
889 .long sys_rt_sigpending
890 .long sys_rt_sigtimedwait
891 .long sys_rt_sigqueueinfo
892 .long sys_rt_sigsuspend
893 .long sys_pread64 /* 180 */
894 .long sys_pwrite64
895 .long sys_ni_syscall /* chown16 syscall holder */
896 .long sys_getcwd
897 .long sys_capget
898 .long sys_capset /* 185 */
899 .long sys_sigaltstack
900 .long sys_sendfile
901 .long sys_ni_syscall /* streams1 */
902 .long sys_ni_syscall /* streams2 */
903 .long sys_vfork /* 190 */
904 .long sys_getrlimit
905 .long sys_mmap2
906 .long sys_truncate64
907 .long sys_ftruncate64
908 .long sys_stat64 /* 195 */
909 .long sys_lstat64
910 .long sys_fstat64
911 .long sys_lchown
912 .long sys_getuid
913 .long sys_getgid /* 200 */
914 .long sys_geteuid
915 .long sys_getegid
916 .long sys_setreuid
917 .long sys_setregid
918 .long sys_getgroups /* 205 */
919 .long sys_setgroups
920 .long sys_fchown
921 .long sys_setresuid
922 .long sys_getresuid
923 .long sys_setresgid /* 210 */
924 .long sys_getresgid
925 .long sys_chown
926 .long sys_setuid
927 .long sys_setgid
928 .long sys_setfsuid /* 215 */
929 .long sys_setfsgid
930 .long sys_pivot_root
931 .long sys_mincore
932 .long sys_madvise
933 .long sys_getdents64 /* 220 */
934 .long sys_fcntl64
935 .long sys_ni_syscall /* reserved for TUX */
936 .long sys_ni_syscall /* Reserved for Security */
937 .long sys_gettid
938 .long sys_readahead /* 225 */
939 .long sys_setxattr
940 .long sys_lsetxattr
941 .long sys_fsetxattr
942 .long sys_getxattr
943 .long sys_lgetxattr /* 230 */
944 .long sys_fgetxattr
945 .long sys_listxattr
946 .long sys_llistxattr
947 .long sys_flistxattr
948 .long sys_removexattr /* 235 */
949 .long sys_lremovexattr
950 .long sys_fremovexattr
951 .long sys_tkill
952 .long sys_sendfile64
953 .long sys_futex /* 240 */
954 .long sys_sched_setaffinity
955 .long sys_sched_getaffinity
956 .long sys_ni_syscall /* reserved for "set_thread_area" system call */
957 .long sys_ni_syscall /* reserved for "get_thread_area" system call */
958 .long sys_io_setup /* 245 */
959 .long sys_io_destroy
960 .long sys_io_getevents
961 .long sys_io_submit
962 .long sys_io_cancel
963 .long sys_fadvise64 /* 250 */
964 .long sys_ni_syscall
965 .long sys_exit_group
966 .long sys_lookup_dcookie
967 .long sys_epoll_create
968 .long sys_epoll_ctl /* 255 */
969 .long sys_epoll_wait
970 .long sys_remap_file_pages
971 .long sys_set_tid_address
972 .long sys_timer_create
973 .long sys_timer_settime /* 260 */
974 .long sys_timer_gettime
975 .long sys_timer_getoverrun
976 .long sys_timer_delete
977 .long sys_clock_settime
978 .long sys_clock_gettime /* 265 */
979 .long sys_clock_getres
980 .long sys_clock_nanosleep
981 .long sys_statfs64
982 .long sys_fstatfs64
983 .long sys_tgkill /* 270 */
984 .long sys_utimes
985 .long sys_fadvise64_64
986 .long sys_ni_syscall /* Reserved for sys_vserver */
987 .long sys_ni_syscall /* Reserved for sys_mbind */
988 .long sys_ni_syscall /* Reserved for sys_get_mempolicy */
989 .long sys_ni_syscall /* Reserved for sys_set_mempolicy */
990 .long sys_mq_open
991 .long sys_mq_unlink
992 .long sys_mq_timedsend
993 .long sys_mq_timedreceive /* 280 */
994 .long sys_mq_notify
995 .long sys_mq_getsetattr
996 .long sys_ni_syscall /* reserved for kexec */
997 .long sys_waitid
998
999 syscall_table_size=(.-sys_call_table)
1000