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1394f032 BW |
1 | /* |
2 | * File: arch/blackfin/mach-common/entry.S | |
3 | * Based on: | |
4 | * Author: Linus Torvalds | |
5 | * | |
6 | * Created: ? | |
7 | * Description: contains the system-call and fault low-level handling routines. | |
8 | * This also contains the timer-interrupt handler, as well as all | |
9 | * interrupts and faults that can result in a task-switch. | |
10 | * | |
11 | * Modified: | |
12 | * Copyright 2004-2006 Analog Devices Inc. | |
13 | * | |
14 | * Bugs: Enter bugs at http://blackfin.uclinux.org/ | |
15 | * | |
16 | * This program is free software; you can redistribute it and/or modify | |
17 | * it under the terms of the GNU General Public License as published by | |
18 | * the Free Software Foundation; either version 2 of the License, or | |
19 | * (at your option) any later version. | |
20 | * | |
21 | * This program is distributed in the hope that it will be useful, | |
22 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
23 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
24 | * GNU General Public License for more details. | |
25 | * | |
26 | * You should have received a copy of the GNU General Public License | |
27 | * along with this program; if not, see the file COPYING, or write | |
28 | * to the Free Software Foundation, Inc., | |
29 | * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
30 | */ | |
31 | ||
2ebcade5 | 32 | /* NOTE: This code handles signal-recognition, which happens every time |
1394f032 BW |
33 | * after a timer-interrupt and after each system call. |
34 | */ | |
35 | ||
9cb07b23 | 36 | #include <linux/init.h> |
1394f032 | 37 | #include <linux/linkage.h> |
1f83b8f1 | 38 | #include <linux/unistd.h> |
1394f032 | 39 | #include <asm/blackfin.h> |
1394f032 | 40 | #include <asm/errno.h> |
5d750b9e | 41 | #include <asm/fixed_code.h> |
1394f032 BW |
42 | #include <asm/thread_info.h> /* TIF_NEED_RESCHED */ |
43 | #include <asm/asm-offsets.h> | |
669b792c | 44 | #include <asm/trace.h> |
1394f032 BW |
45 | |
46 | #include <asm/mach-common/context.S> | |
47 | ||
f0b5d12f MF |
48 | #if defined(CONFIG_BFIN_SCRATCH_REG_RETN) |
49 | # define EX_SCRATCH_REG RETN | |
50 | #elif defined(CONFIG_BFIN_SCRATCH_REG_RETE) | |
51 | # define EX_SCRATCH_REG RETE | |
52 | #else | |
53 | # define EX_SCRATCH_REG CYCLES | |
54 | #endif | |
55 | ||
1394f032 BW |
56 | #ifdef CONFIG_EXCPT_IRQ_SYSC_L1 |
57 | .section .l1.text | |
58 | #else | |
59 | .text | |
60 | #endif | |
61 | ||
62 | /* Slightly simplified and streamlined entry point for CPLB misses. | |
63 | * This one does not lower the level to IRQ5, and thus can be used to | |
64 | * patch up CPLB misses on the kernel stack. | |
65 | */ | |
1aafd909 | 66 | #if ANOMALY_05000261 |
f26fbc48 RG |
67 | #define _ex_dviol _ex_workaround_261 |
68 | #define _ex_dmiss _ex_workaround_261 | |
69 | #define _ex_dmult _ex_workaround_261 | |
70 | ||
71 | ENTRY(_ex_workaround_261) | |
1394f032 BW |
72 | /* |
73 | * Work around an anomaly: if we see a new DCPLB fault, return | |
74 | * without doing anything. Then, if we get the same fault again, | |
75 | * handle it. | |
76 | */ | |
f26fbc48 | 77 | P4 = R7; /* Store EXCAUSE */ |
1394f032 BW |
78 | p5.l = _last_cplb_fault_retx; |
79 | p5.h = _last_cplb_fault_retx; | |
80 | r7 = [p5]; | |
81 | r6 = retx; | |
82 | [p5] = r6; | |
83 | cc = r6 == r7; | |
8d6c2420 | 84 | if !cc jump _bfin_return_from_exception; |
1394f032 | 85 | /* fall through */ |
f26fbc48 RG |
86 | R7 = P4; |
87 | R6 = 0x26; /* Data CPLB Miss */ | |
88 | cc = R6 == R7; | |
89 | if cc jump _ex_dcplb_miss (BP); | |
b97b8a99 BS |
90 | R6 = 0x23; /* Data CPLB Miss */ |
91 | cc = R6 == R7; | |
92 | if cc jump _ex_dcplb_viol (BP); | |
f26fbc48 RG |
93 | /* Handle 0x23 Data CPLB Protection Violation |
94 | * and Data CPLB Multiple Hits - Linux Trap Zero | |
95 | */ | |
96 | jump _ex_trap_c; | |
97 | ENDPROC(_ex_workaround_261) | |
98 | ||
b97b8a99 BS |
99 | #else |
100 | #ifdef CONFIG_MPU | |
101 | #define _ex_dviol _ex_dcplb_viol | |
f26fbc48 RG |
102 | #else |
103 | #define _ex_dviol _ex_trap_c | |
b97b8a99 | 104 | #endif |
f26fbc48 RG |
105 | #define _ex_dmiss _ex_dcplb_miss |
106 | #define _ex_dmult _ex_trap_c | |
1394f032 BW |
107 | #endif |
108 | ||
b97b8a99 BS |
109 | |
110 | ENTRY(_ex_dcplb_viol) | |
f26fbc48 RG |
111 | ENTRY(_ex_dcplb_miss) |
112 | ENTRY(_ex_icplb_miss) | |
1394f032 BW |
113 | (R7:6,P5:4) = [sp++]; |
114 | ASTAT = [sp++]; | |
115 | SAVE_ALL_SYS | |
b97b8a99 | 116 | #ifdef CONFIG_MPU |
2a0c4fdb BS |
117 | /* We must load R1 here, _before_ DEBUG_HWTRACE_SAVE, since that |
118 | * will change the stack pointer. */ | |
b97b8a99 BS |
119 | R0 = SEQSTAT; |
120 | R1 = SP; | |
2a0c4fdb BS |
121 | #endif |
122 | DEBUG_HWTRACE_SAVE(p5, r7) | |
123 | #ifdef CONFIG_MPU | |
b97b8a99 BS |
124 | sp += -12; |
125 | call _cplb_hdr; | |
126 | sp += 12; | |
127 | CC = R0 == 0; | |
128 | IF !CC JUMP _handle_bad_cplb; | |
129 | #else | |
1394f032 | 130 | call __cplb_hdr; |
b97b8a99 | 131 | #endif |
80f31c8a | 132 | DEBUG_HWTRACE_RESTORE(p5, r7) |
1394f032 | 133 | RESTORE_ALL_SYS |
f0b5d12f | 134 | SP = EX_SCRATCH_REG; |
1394f032 | 135 | rtx; |
f26fbc48 | 136 | ENDPROC(_ex_icplb_miss) |
1394f032 | 137 | |
1394f032 | 138 | ENTRY(_ex_syscall) |
1394f032 BW |
139 | (R7:6,P5:4) = [sp++]; |
140 | ASTAT = [sp++]; | |
141 | raise 15; /* invoked by TRAP #0, for sys call */ | |
f0b5d12f | 142 | sp = EX_SCRATCH_REG; |
1394f032 | 143 | rtx |
51be24c3 | 144 | ENDPROC(_ex_syscall) |
1394f032 | 145 | |
1394f032 BW |
146 | ENTRY(_ex_soft_bp) |
147 | r7 = retx; | |
148 | r7 += -2; | |
149 | retx = r7; | |
150 | jump.s _ex_trap_c; | |
51be24c3 | 151 | ENDPROC(_ex_soft_bp) |
1394f032 BW |
152 | |
153 | ENTRY(_ex_single_step) | |
0893f125 BS |
154 | /* If we just returned from an interrupt, the single step event is |
155 | for the RTI instruction. */ | |
1394f032 BW |
156 | r7 = retx; |
157 | r6 = reti; | |
158 | cc = r7 == r6; | |
0893f125 | 159 | if cc jump _bfin_return_from_exception; |
1394f032 | 160 | |
5400c5aa | 161 | #ifdef CONFIG_KGDB |
0d1cdd7a SZ |
162 | /* Don't do single step in hardware exception handler */ |
163 | p5.l = lo(IPEND); | |
164 | p5.h = hi(IPEND); | |
165 | r6 = [p5]; | |
166 | cc = bittst(r6, 5); | |
167 | if cc jump _bfin_return_from_exception; | |
168 | ||
0d1cdd7a SZ |
169 | /* skip single step if current interrupt priority is higher than |
170 | * that of the first instruction, from which gdb starts single step */ | |
171 | r6 >>= 6; | |
172 | r7 = 10; | |
173 | .Lfind_priority_start: | |
174 | cc = bittst(r6, 0); | |
175 | if cc jump .Lfind_priority_done; | |
176 | r6 >>= 1; | |
177 | r7 += -1; | |
178 | cc = r7 == 0; | |
179 | if cc jump .Lfind_priority_done; | |
180 | jump.s .Lfind_priority_start; | |
181 | .Lfind_priority_done: | |
182 | p4.l = _debugger_step; | |
183 | p4.h = _debugger_step; | |
184 | r6 = [p4]; | |
185 | cc = r6 == 0; | |
186 | if cc jump .Ldo_single_step; | |
187 | r6 += -1; | |
188 | cc = r6 < r7; | |
189 | if cc jump _bfin_return_from_exception; | |
190 | .Ldo_single_step: | |
191 | #endif | |
192 | ||
0893f125 | 193 | /* If we were in user mode, do the single step normally. */ |
5400c5aa JZ |
194 | p5.l = lo(IPEND); |
195 | p5.h = hi(IPEND); | |
1394f032 | 196 | r6 = [p5]; |
0893f125 BS |
197 | r7 = 0xffe0 (z); |
198 | r7 = r7 & r6; | |
199 | cc = r7 == 0; | |
5400c5aa | 200 | if !cc jump 1f; |
0893f125 | 201 | |
5400c5aa JZ |
202 | /* Single stepping only a single instruction, so clear the trace |
203 | * bit here. */ | |
204 | r7 = syscfg; | |
205 | bitclr (r7, 0); | |
206 | syscfg = R7; | |
207 | jump _ex_trap_c; | |
208 | ||
209 | 1: | |
0893f125 BS |
210 | /* |
211 | * We were in an interrupt handler. By convention, all of them save | |
212 | * SYSCFG with their first instruction, so by checking whether our | |
213 | * RETX points at the entry point, we can determine whether to allow | |
214 | * a single step, or whether to clear SYSCFG. | |
215 | * | |
216 | * First, find out the interrupt level and the event vector for it. | |
217 | */ | |
218 | p5.l = lo(EVT0); | |
219 | p5.h = hi(EVT0); | |
220 | p5 += -4; | |
221 | 2: | |
222 | r7 = rot r7 by -1; | |
223 | p5 += 4; | |
224 | if !cc jump 2b; | |
225 | ||
226 | /* What we actually do is test for the _second_ instruction in the | |
227 | * IRQ handler. That way, if there are insns following the restore | |
228 | * of SYSCFG after leaving the handler, we will not turn off SYSCFG | |
229 | * for them. */ | |
230 | ||
231 | r7 = [p5]; | |
232 | r7 += 2; | |
233 | r6 = RETX; | |
234 | cc = R7 == R6; | |
235 | if !cc jump _bfin_return_from_exception; | |
236 | ||
237 | r7 = syscfg; | |
238 | bitclr (r7, 0); | |
239 | syscfg = R7; | |
240 | ||
5400c5aa | 241 | /* Fall through to _bfin_return_from_exception. */ |
46c87c3c | 242 | ENDPROC(_ex_single_step) |
1394f032 | 243 | |
8d6c2420 | 244 | ENTRY(_bfin_return_from_exception) |
1aafd909 | 245 | #if ANOMALY_05000257 |
8af10b79 MH |
246 | R7=LC0; |
247 | LC0=R7; | |
248 | R7=LC1; | |
249 | LC1=R7; | |
250 | #endif | |
1394f032 BW |
251 | (R7:6,P5:4) = [sp++]; |
252 | ASTAT = [sp++]; | |
f0b5d12f | 253 | sp = EX_SCRATCH_REG; |
1394f032 | 254 | rtx; |
46c87c3c | 255 | ENDPROC(_bfin_return_from_exception) |
1394f032 BW |
256 | |
257 | ENTRY(_handle_bad_cplb) | |
2a0c4fdb | 258 | DEBUG_HWTRACE_RESTORE(p5, r7) |
1394f032 BW |
259 | /* To get here, we just tried and failed to change a CPLB |
260 | * so, handle things in trap_c (C code), by lowering to | |
261 | * IRQ5, just like we normally do. Since this is not a | |
262 | * "normal" return path, we have a do alot of stuff to | |
263 | * the stack to get ready so, we can fall through - we | |
264 | * need to make a CPLB exception look like a normal exception | |
265 | */ | |
266 | ||
1394f032 BW |
267 | RESTORE_ALL_SYS |
268 | [--sp] = ASTAT; | |
80f31c8a | 269 | [--sp] = (R7:6,P5:4); |
1394f032 | 270 | |
1ffe6646 MF |
271 | ENTRY(_ex_replaceable) |
272 | nop; | |
273 | ||
1394f032 | 274 | ENTRY(_ex_trap_c) |
2ebcade5 RG |
275 | /* Make sure we are not in a double fault */ |
276 | p4.l = lo(IPEND); | |
277 | p4.h = hi(IPEND); | |
278 | r7 = [p4]; | |
279 | CC = BITTST (r7, 5); | |
280 | if CC jump _double_fault; | |
281 | ||
1394f032 BW |
282 | /* Call C code (trap_c) to handle the exception, which most |
283 | * likely involves sending a signal to the current process. | |
284 | * To avoid double faults, lower our priority to IRQ5 first. | |
285 | */ | |
286 | P5.h = _exception_to_level5; | |
287 | P5.l = _exception_to_level5; | |
288 | p4.l = lo(EVT5); | |
289 | p4.h = hi(EVT5); | |
290 | [p4] = p5; | |
291 | csync; | |
292 | ||
5d750b9e BS |
293 | p4.l = lo(DCPLB_FAULT_ADDR); |
294 | p4.h = hi(DCPLB_FAULT_ADDR); | |
295 | r7 = [p4]; | |
296 | p5.h = _saved_dcplb_fault_addr; | |
297 | p5.l = _saved_dcplb_fault_addr; | |
298 | [p5] = r7; | |
299 | ||
300 | r7 = [p4 + (ICPLB_FAULT_ADDR - DCPLB_FAULT_ADDR)]; | |
301 | p5.h = _saved_icplb_fault_addr; | |
302 | p5.l = _saved_icplb_fault_addr; | |
303 | [p5] = r7; | |
304 | ||
0893f125 BS |
305 | p4.l = _excpt_saved_stuff; |
306 | p4.h = _excpt_saved_stuff; | |
307 | ||
5d750b9e BS |
308 | r6 = retx; |
309 | [p4] = r6; | |
0893f125 BS |
310 | |
311 | r6 = SYSCFG; | |
312 | [p4 + 4] = r6; | |
313 | BITCLR(r6, 0); | |
314 | SYSCFG = r6; | |
5d750b9e | 315 | |
1394f032 BW |
316 | /* Disable all interrupts, but make sure level 5 is enabled so |
317 | * we can switch to that level. Save the old mask. */ | |
318 | cli r6; | |
0893f125 BS |
319 | [p4 + 8] = r6; |
320 | ||
321 | p4.l = lo(SAFE_USER_INSTRUCTION); | |
322 | p4.h = hi(SAFE_USER_INSTRUCTION); | |
323 | retx = p4; | |
324 | ||
1394f032 BW |
325 | r6 = 0x3f; |
326 | sti r6; | |
327 | ||
1394f032 BW |
328 | (R7:6,P5:4) = [sp++]; |
329 | ASTAT = [sp++]; | |
f0b5d12f | 330 | SP = EX_SCRATCH_REG; |
1394f032 BW |
331 | raise 5; |
332 | rtx; | |
51be24c3 | 333 | ENDPROC(_ex_trap_c) |
1394f032 | 334 | |
2ebcade5 RG |
335 | /* We just realized we got an exception, while we were processing a different |
336 | * exception. This is a unrecoverable event, so crash | |
337 | */ | |
338 | ENTRY(_double_fault) | |
339 | /* Turn caches & protection off, to ensure we don't get any more | |
340 | * double exceptions | |
341 | */ | |
342 | ||
343 | P4.L = LO(IMEM_CONTROL); | |
344 | P4.H = HI(IMEM_CONTROL); | |
345 | ||
346 | R5 = [P4]; /* Control Register*/ | |
347 | BITCLR(R5,ENICPLB_P); | |
348 | SSYNC; /* SSYNC required before writing to IMEM_CONTROL. */ | |
349 | .align 8; | |
350 | [P4] = R5; | |
351 | SSYNC; | |
352 | ||
353 | P4.L = LO(DMEM_CONTROL); | |
354 | P4.H = HI(DMEM_CONTROL); | |
355 | R5 = [P4]; | |
356 | BITCLR(R5,ENDCPLB_P); | |
357 | SSYNC; /* SSYNC required before writing to DMEM_CONTROL. */ | |
358 | .align 8; | |
359 | [P4] = R5; | |
360 | SSYNC; | |
361 | ||
362 | /* Fix up the stack */ | |
363 | (R7:6,P5:4) = [sp++]; | |
364 | ASTAT = [sp++]; | |
365 | SP = EX_SCRATCH_REG; | |
366 | ||
367 | /* We should be out of the exception stack, and back down into | |
368 | * kernel or user space stack | |
369 | */ | |
370 | SAVE_ALL_SYS | |
371 | ||
ddb3f00c BS |
372 | /* The dumping functions expect the return address in the RETI |
373 | * slot. */ | |
374 | r6 = retx; | |
375 | [sp + PT_PC] = r6; | |
376 | ||
2ebcade5 RG |
377 | r0 = sp; /* stack frame pt_regs pointer argument ==> r0 */ |
378 | SP += -12; | |
379 | call _double_fault_c; | |
380 | SP += 12; | |
381 | .L_double_fault_panic: | |
382 | JUMP .L_double_fault_panic | |
383 | ||
384 | ENDPROC(_double_fault) | |
385 | ||
1394f032 BW |
386 | ENTRY(_exception_to_level5) |
387 | SAVE_ALL_SYS | |
388 | ||
0893f125 BS |
389 | p4.l = _excpt_saved_stuff; |
390 | p4.h = _excpt_saved_stuff; | |
5d750b9e BS |
391 | r6 = [p4]; |
392 | [sp + PT_PC] = r6; | |
393 | ||
0893f125 BS |
394 | r6 = [p4 + 4]; |
395 | [sp + PT_SYSCFG] = r6; | |
396 | ||
1394f032 BW |
397 | /* Restore interrupt mask. We haven't pushed RETI, so this |
398 | * doesn't enable interrupts until we return from this handler. */ | |
0893f125 | 399 | r6 = [p4 + 8]; |
1394f032 BW |
400 | sti r6; |
401 | ||
402 | /* Restore the hardware error vector. */ | |
403 | P5.h = _evt_ivhw; | |
404 | P5.l = _evt_ivhw; | |
405 | p4.l = lo(EVT5); | |
406 | p4.h = hi(EVT5); | |
407 | [p4] = p5; | |
408 | csync; | |
409 | ||
410 | p2.l = lo(IPEND); | |
411 | p2.h = hi(IPEND); | |
412 | csync; | |
413 | r0 = [p2]; /* Read current IPEND */ | |
414 | [sp + PT_IPEND] = r0; /* Store IPEND */ | |
415 | ||
1394f032 BW |
416 | r0 = sp; /* stack frame pt_regs pointer argument ==> r0 */ |
417 | SP += -12; | |
418 | call _trap_c; | |
419 | SP += 12; | |
420 | ||
1394f032 BW |
421 | call _ret_from_exception; |
422 | RESTORE_ALL_SYS | |
423 | rti; | |
51be24c3 | 424 | ENDPROC(_exception_to_level5) |
1394f032 BW |
425 | |
426 | ENTRY(_trap) /* Exception: 4th entry into system event table(supervisor mode)*/ | |
427 | /* Since the kernel stack can be anywhere, it's not guaranteed to be | |
428 | * covered by a CPLB. Switch to an exception stack; use RETN as a | |
429 | * scratch register (for want of a better option). | |
430 | */ | |
f0b5d12f | 431 | EX_SCRATCH_REG = sp; |
1394f032 BW |
432 | sp.l = _exception_stack_top; |
433 | sp.h = _exception_stack_top; | |
434 | /* Try to deal with syscalls quickly. */ | |
435 | [--sp] = ASTAT; | |
80f31c8a | 436 | [--sp] = (R7:6,P5:4); |
1394f032 BW |
437 | r7 = SEQSTAT; /* reason code is in bit 5:0 */ |
438 | r6.l = lo(SEQSTAT_EXCAUSE); | |
439 | r6.h = hi(SEQSTAT_EXCAUSE); | |
440 | r7 = r7 & r6; | |
1ffe6646 MF |
441 | p5.h = _ex_table; |
442 | p5.l = _ex_table; | |
1394f032 BW |
443 | p4 = r7; |
444 | p5 = p5 + (p4 << 2); | |
445 | p4 = [p5]; | |
446 | jump (p4); | |
447 | ||
448 | .Lbadsys: | |
449 | r7 = -ENOSYS; /* signextending enough */ | |
450 | [sp + PT_R0] = r7; /* return value from system call */ | |
451 | jump .Lsyscall_really_exit; | |
51be24c3 | 452 | ENDPROC(_trap) |
1394f032 BW |
453 | |
454 | ENTRY(_kernel_execve) | |
455 | link SIZEOF_PTREGS; | |
456 | p0 = sp; | |
457 | r3 = SIZEOF_PTREGS / 4; | |
458 | r4 = 0(x); | |
459 | 0: | |
460 | [p0++] = r4; | |
461 | r3 += -1; | |
462 | cc = r3 == 0; | |
463 | if !cc jump 0b (bp); | |
464 | ||
465 | p0 = sp; | |
466 | sp += -16; | |
467 | [sp + 12] = p0; | |
468 | call _do_execve; | |
469 | SP += 16; | |
470 | cc = r0 == 0; | |
471 | if ! cc jump 1f; | |
472 | /* Success. Copy our temporary pt_regs to the top of the kernel | |
473 | * stack and do a normal exception return. | |
474 | */ | |
475 | r1 = sp; | |
476 | r0 = (-KERNEL_STACK_SIZE) (x); | |
477 | r1 = r1 & r0; | |
478 | p2 = r1; | |
479 | p3 = [p2]; | |
480 | r0 = KERNEL_STACK_SIZE - 4 (z); | |
481 | p1 = r0; | |
482 | p1 = p1 + p2; | |
483 | ||
484 | p0 = fp; | |
485 | r4 = [p0--]; | |
486 | r3 = SIZEOF_PTREGS / 4; | |
487 | 0: | |
488 | r4 = [p0--]; | |
489 | [p1--] = r4; | |
490 | r3 += -1; | |
491 | cc = r3 == 0; | |
492 | if ! cc jump 0b (bp); | |
493 | ||
494 | r0 = (KERNEL_STACK_SIZE - SIZEOF_PTREGS) (z); | |
495 | p1 = r0; | |
496 | p1 = p1 + p2; | |
497 | sp = p1; | |
498 | r0 = syscfg; | |
499 | [SP + PT_SYSCFG] = r0; | |
500 | [p3 + (TASK_THREAD + THREAD_KSP)] = sp; | |
501 | ||
502 | RESTORE_CONTEXT; | |
503 | rti; | |
504 | 1: | |
505 | unlink; | |
506 | rts; | |
51be24c3 | 507 | ENDPROC(_kernel_execve) |
1394f032 BW |
508 | |
509 | ENTRY(_system_call) | |
510 | /* Store IPEND */ | |
511 | p2.l = lo(IPEND); | |
512 | p2.h = hi(IPEND); | |
513 | csync; | |
514 | r0 = [p2]; | |
515 | [sp + PT_IPEND] = r0; | |
516 | ||
517 | /* Store RETS for now */ | |
518 | r0 = rets; | |
519 | [sp + PT_RESERVED] = r0; | |
520 | /* Set the stack for the current process */ | |
521 | r7 = sp; | |
522 | r6.l = lo(ALIGN_PAGE_MASK); | |
523 | r6.h = hi(ALIGN_PAGE_MASK); | |
524 | r7 = r7 & r6; /* thread_info */ | |
525 | p2 = r7; | |
526 | p2 = [p2]; | |
527 | ||
528 | [p2+(TASK_THREAD+THREAD_KSP)] = sp; | |
529 | ||
530 | /* Check the System Call */ | |
531 | r7 = __NR_syscall; | |
532 | /* System call number is passed in P0 */ | |
533 | r6 = p0; | |
534 | cc = r6 < r7; | |
535 | if ! cc jump .Lbadsys; | |
536 | ||
537 | /* are we tracing syscalls?*/ | |
538 | r7 = sp; | |
539 | r6.l = lo(ALIGN_PAGE_MASK); | |
540 | r6.h = hi(ALIGN_PAGE_MASK); | |
541 | r7 = r7 & r6; | |
542 | p2 = r7; | |
543 | r7 = [p2+TI_FLAGS]; | |
544 | CC = BITTST(r7,TIF_SYSCALL_TRACE); | |
545 | if CC JUMP _sys_trace; | |
546 | ||
547 | /* Execute the appropriate system call */ | |
548 | ||
549 | p4 = p0; | |
550 | p5.l = _sys_call_table; | |
551 | p5.h = _sys_call_table; | |
552 | p5 = p5 + (p4 << 2); | |
553 | r0 = [sp + PT_R0]; | |
554 | r1 = [sp + PT_R1]; | |
555 | r2 = [sp + PT_R2]; | |
556 | p5 = [p5]; | |
557 | ||
558 | [--sp] = r5; | |
559 | [--sp] = r4; | |
560 | [--sp] = r3; | |
561 | SP += -12; | |
562 | call (p5); | |
563 | SP += 24; | |
564 | [sp + PT_R0] = r0; | |
565 | ||
566 | .Lresume_userspace: | |
567 | r7 = sp; | |
568 | r4.l = lo(ALIGN_PAGE_MASK); | |
569 | r4.h = hi(ALIGN_PAGE_MASK); | |
570 | r7 = r7 & r4; /* thread_info->flags */ | |
571 | p5 = r7; | |
572 | .Lresume_userspace_1: | |
573 | /* Disable interrupts. */ | |
574 | [--sp] = reti; | |
575 | reti = [sp++]; | |
576 | ||
577 | r7 = [p5 + TI_FLAGS]; | |
578 | r4.l = lo(_TIF_WORK_MASK); | |
579 | r4.h = hi(_TIF_WORK_MASK); | |
580 | r7 = r7 & r4; | |
581 | ||
582 | .Lsyscall_resched: | |
583 | cc = BITTST(r7, TIF_NEED_RESCHED); | |
584 | if !cc jump .Lsyscall_sigpending; | |
585 | ||
586 | /* Reenable interrupts. */ | |
587 | [--sp] = reti; | |
588 | r0 = [sp++]; | |
589 | ||
590 | SP += -12; | |
591 | call _schedule; | |
592 | SP += 12; | |
593 | ||
594 | jump .Lresume_userspace_1; | |
595 | ||
596 | .Lsyscall_sigpending: | |
597 | cc = BITTST(r7, TIF_RESTORE_SIGMASK); | |
598 | if cc jump .Lsyscall_do_signals; | |
599 | cc = BITTST(r7, TIF_SIGPENDING); | |
600 | if !cc jump .Lsyscall_really_exit; | |
601 | .Lsyscall_do_signals: | |
602 | /* Reenable interrupts. */ | |
603 | [--sp] = reti; | |
604 | r0 = [sp++]; | |
605 | ||
606 | r0 = sp; | |
607 | SP += -12; | |
608 | call _do_signal; | |
609 | SP += 12; | |
610 | ||
611 | .Lsyscall_really_exit: | |
612 | r5 = [sp + PT_RESERVED]; | |
613 | rets = r5; | |
614 | rts; | |
51be24c3 | 615 | ENDPROC(_system_call) |
1394f032 BW |
616 | |
617 | _sys_trace: | |
618 | call _syscall_trace; | |
619 | ||
620 | /* Execute the appropriate system call */ | |
621 | ||
622 | p4 = [SP + PT_P0]; | |
623 | p5.l = _sys_call_table; | |
624 | p5.h = _sys_call_table; | |
625 | p5 = p5 + (p4 << 2); | |
626 | r0 = [sp + PT_R0]; | |
627 | r1 = [sp + PT_R1]; | |
628 | r2 = [sp + PT_R2]; | |
629 | r3 = [sp + PT_R3]; | |
630 | r4 = [sp + PT_R4]; | |
631 | r5 = [sp + PT_R5]; | |
632 | p5 = [p5]; | |
633 | ||
634 | [--sp] = r5; | |
635 | [--sp] = r4; | |
636 | [--sp] = r3; | |
637 | SP += -12; | |
638 | call (p5); | |
639 | SP += 24; | |
640 | [sp + PT_R0] = r0; | |
641 | ||
642 | call _syscall_trace; | |
643 | jump .Lresume_userspace; | |
51be24c3 | 644 | ENDPROC(_sys_trace) |
1394f032 BW |
645 | |
646 | ENTRY(_resume) | |
647 | /* | |
648 | * Beware - when entering resume, prev (the current task) is | |
649 | * in r0, next (the new task) is in r1. | |
650 | */ | |
651 | p0 = r0; | |
652 | p1 = r1; | |
653 | [--sp] = rets; | |
654 | [--sp] = fp; | |
655 | [--sp] = (r7:4, p5:3); | |
656 | ||
657 | /* save usp */ | |
658 | p2 = usp; | |
659 | [p0+(TASK_THREAD+THREAD_USP)] = p2; | |
660 | ||
661 | /* save current kernel stack pointer */ | |
662 | [p0+(TASK_THREAD+THREAD_KSP)] = sp; | |
663 | ||
664 | /* save program counter */ | |
665 | r1.l = _new_old_task; | |
666 | r1.h = _new_old_task; | |
667 | [p0+(TASK_THREAD+THREAD_PC)] = r1; | |
668 | ||
669 | /* restore the kernel stack pointer */ | |
670 | sp = [p1+(TASK_THREAD+THREAD_KSP)]; | |
671 | ||
672 | /* restore user stack pointer */ | |
673 | p0 = [p1+(TASK_THREAD+THREAD_USP)]; | |
674 | usp = p0; | |
675 | ||
676 | /* restore pc */ | |
677 | p0 = [p1+(TASK_THREAD+THREAD_PC)]; | |
678 | jump (p0); | |
679 | ||
680 | /* | |
681 | * Following code actually lands up in a new (old) task. | |
682 | */ | |
683 | ||
684 | _new_old_task: | |
685 | (r7:4, p5:3) = [sp++]; | |
686 | fp = [sp++]; | |
687 | rets = [sp++]; | |
688 | ||
689 | /* | |
690 | * When we come out of resume, r0 carries "old" task, becuase we are | |
691 | * in "new" task. | |
692 | */ | |
693 | rts; | |
51be24c3 | 694 | ENDPROC(_resume) |
1394f032 BW |
695 | |
696 | ENTRY(_ret_from_exception) | |
697 | p2.l = lo(IPEND); | |
698 | p2.h = hi(IPEND); | |
699 | ||
700 | csync; | |
701 | r0 = [p2]; | |
702 | [sp + PT_IPEND] = r0; | |
703 | ||
704 | 1: | |
d5c4b5e3 | 705 | r2 = LO(~0x37) (Z); |
1394f032 BW |
706 | r0 = r2 & r0; |
707 | cc = r0 == 0; | |
708 | if !cc jump 4f; /* if not return to user mode, get out */ | |
709 | ||
710 | /* Make sure any pending system call or deferred exception | |
711 | * return in ILAT for this process to get executed, otherwise | |
712 | * in case context switch happens, system call of | |
713 | * first process (i.e in ILAT) will be carried | |
714 | * forward to the switched process | |
715 | */ | |
716 | ||
717 | p2.l = lo(ILAT); | |
718 | p2.h = hi(ILAT); | |
719 | r0 = [p2]; | |
720 | r1 = (EVT_IVG14 | EVT_IVG15) (z); | |
721 | r0 = r0 & r1; | |
722 | cc = r0 == 0; | |
723 | if !cc jump 5f; | |
724 | ||
725 | /* Set the stack for the current process */ | |
726 | r7 = sp; | |
727 | r4.l = lo(ALIGN_PAGE_MASK); | |
728 | r4.h = hi(ALIGN_PAGE_MASK); | |
729 | r7 = r7 & r4; /* thread_info->flags */ | |
730 | p5 = r7; | |
731 | r7 = [p5 + TI_FLAGS]; | |
732 | r4.l = lo(_TIF_WORK_MASK); | |
733 | r4.h = hi(_TIF_WORK_MASK); | |
734 | r7 = r7 & r4; | |
735 | cc = r7 == 0; | |
736 | if cc jump 4f; | |
737 | ||
738 | p0.l = lo(EVT15); | |
739 | p0.h = hi(EVT15); | |
740 | p1.l = _schedule_and_signal; | |
741 | p1.h = _schedule_and_signal; | |
742 | [p0] = p1; | |
743 | csync; | |
744 | raise 15; /* raise evt14 to do signal or reschedule */ | |
745 | 4: | |
746 | r0 = syscfg; | |
747 | bitclr(r0, 0); | |
748 | syscfg = r0; | |
749 | 5: | |
750 | rts; | |
51be24c3 | 751 | ENDPROC(_ret_from_exception) |
1394f032 BW |
752 | |
753 | ENTRY(_return_from_int) | |
754 | /* If someone else already raised IRQ 15, do nothing. */ | |
755 | csync; | |
756 | p2.l = lo(ILAT); | |
757 | p2.h = hi(ILAT); | |
758 | r0 = [p2]; | |
759 | cc = bittst (r0, EVT_IVG15_P); | |
760 | if cc jump 2f; | |
761 | ||
762 | /* if not return to user mode, get out */ | |
763 | p2.l = lo(IPEND); | |
764 | p2.h = hi(IPEND); | |
765 | r0 = [p2]; | |
766 | r1 = 0x17(Z); | |
767 | r2 = ~r1; | |
768 | r2.h = 0; | |
769 | r0 = r2 & r0; | |
770 | r1 = 1; | |
771 | r1 = r0 - r1; | |
772 | r2 = r0 & r1; | |
773 | cc = r2 == 0; | |
774 | if !cc jump 2f; | |
775 | ||
776 | /* Lower the interrupt level to 15. */ | |
777 | p0.l = lo(EVT15); | |
778 | p0.h = hi(EVT15); | |
779 | p1.l = _schedule_and_signal_from_int; | |
780 | p1.h = _schedule_and_signal_from_int; | |
781 | [p0] = p1; | |
782 | csync; | |
1aafd909 | 783 | #if ANOMALY_05000281 |
5d750b9e BS |
784 | r0.l = lo(SAFE_USER_INSTRUCTION); |
785 | r0.h = hi(SAFE_USER_INSTRUCTION); | |
1394f032 BW |
786 | reti = r0; |
787 | #endif | |
788 | r0 = 0x801f (z); | |
789 | STI r0; | |
790 | raise 15; /* raise evt15 to do signal or reschedule */ | |
791 | rti; | |
792 | 2: | |
793 | rts; | |
51be24c3 | 794 | ENDPROC(_return_from_int) |
1394f032 BW |
795 | |
796 | ENTRY(_lower_to_irq14) | |
1aafd909 | 797 | #if ANOMALY_05000281 |
5d750b9e BS |
798 | r0.l = lo(SAFE_USER_INSTRUCTION); |
799 | r0.h = hi(SAFE_USER_INSTRUCTION); | |
1394f032 BW |
800 | reti = r0; |
801 | #endif | |
802 | r0 = 0x401f; | |
803 | sti r0; | |
804 | raise 14; | |
805 | rti; | |
806 | ENTRY(_evt14_softirq) | |
807 | #ifdef CONFIG_DEBUG_HWERR | |
808 | r0 = 0x3f; | |
809 | sti r0; | |
810 | #else | |
811 | cli r0; | |
812 | #endif | |
813 | [--sp] = RETI; | |
814 | SP += 4; | |
815 | rts; | |
816 | ||
817 | _schedule_and_signal_from_int: | |
818 | /* To end up here, vector 15 was changed - so we have to change it | |
819 | * back. | |
820 | */ | |
821 | p0.l = lo(EVT15); | |
822 | p0.h = hi(EVT15); | |
823 | p1.l = _evt_system_call; | |
824 | p1.h = _evt_system_call; | |
825 | [p0] = p1; | |
826 | csync; | |
c824498d BS |
827 | |
828 | /* Set orig_p0 to -1 to indicate this isn't the end of a syscall. */ | |
829 | r0 = -1 (x); | |
830 | [sp + PT_ORIG_P0] = r0; | |
831 | ||
1394f032 BW |
832 | p1 = rets; |
833 | [sp + PT_RESERVED] = p1; | |
834 | ||
835 | p0.l = _irq_flags; | |
836 | p0.h = _irq_flags; | |
837 | r0 = [p0]; | |
838 | sti r0; | |
839 | ||
7adfb58f BS |
840 | r0 = sp; |
841 | sp += -12; | |
842 | call _finish_atomic_sections; | |
843 | sp += 12; | |
1394f032 BW |
844 | jump.s .Lresume_userspace; |
845 | ||
846 | _schedule_and_signal: | |
847 | SAVE_CONTEXT_SYSCALL | |
848 | /* To end up here, vector 15 was changed - so we have to change it | |
849 | * back. | |
850 | */ | |
851 | p0.l = lo(EVT15); | |
852 | p0.h = hi(EVT15); | |
853 | p1.l = _evt_system_call; | |
854 | p1.h = _evt_system_call; | |
855 | [p0] = p1; | |
856 | csync; | |
857 | p0.l = 1f; | |
858 | p0.h = 1f; | |
859 | [sp + PT_RESERVED] = P0; | |
860 | call .Lresume_userspace; | |
861 | 1: | |
862 | RESTORE_CONTEXT | |
863 | rti; | |
51be24c3 | 864 | ENDPROC(_lower_to_irq14) |
1394f032 | 865 | |
518039bc RG |
866 | /* We handle this 100% in exception space - to reduce overhead |
867 | * Only potiential problem is if the software buffer gets swapped out of the | |
868 | * CPLB table - then double fault. - so we don't let this happen in other places | |
869 | */ | |
870 | #ifdef CONFIG_DEBUG_BFIN_HWTRACE_EXPAND | |
871 | ENTRY(_ex_trace_buff_full) | |
872 | [--sp] = P3; | |
873 | [--sp] = P2; | |
874 | [--sp] = LC0; | |
875 | [--sp] = LT0; | |
876 | [--sp] = LB0; | |
877 | P5.L = _trace_buff_offset; | |
878 | P5.H = _trace_buff_offset; | |
879 | P3 = [P5]; /* trace_buff_offset */ | |
880 | P5.L = lo(TBUFSTAT); | |
881 | P5.H = hi(TBUFSTAT); | |
882 | R7 = [P5]; | |
883 | R7 <<= 1; /* double, since we need to read twice */ | |
884 | LC0 = R7; | |
885 | R7 <<= 2; /* need to shift over again, | |
886 | * to get the number of bytes */ | |
887 | P5.L = lo(TBUF); | |
888 | P5.H = hi(TBUF); | |
889 | R6 = ((1 << CONFIG_DEBUG_BFIN_HWTRACE_EXPAND_LEN)*1024) - 1; | |
890 | ||
891 | P2 = R7; | |
892 | P3 = P3 + P2; | |
893 | R7 = P3; | |
894 | R7 = R7 & R6; | |
895 | P3 = R7; | |
896 | P2.L = _trace_buff_offset; | |
897 | P2.H = _trace_buff_offset; | |
898 | [P2] = P3; | |
899 | ||
900 | P2.L = _software_trace_buff; | |
901 | P2.H = _software_trace_buff; | |
902 | ||
903 | LSETUP (.Lstart, .Lend) LC0; | |
904 | .Lstart: | |
905 | R7 = [P5]; /* read TBUF */ | |
906 | P4 = P3 + P2; | |
907 | [P4] = R7; | |
908 | P3 += -4; | |
909 | R7 = P3; | |
910 | R7 = R7 & R6; | |
911 | .Lend: | |
912 | P3 = R7; | |
913 | ||
914 | LB0 = [sp++]; | |
915 | LT0 = [sp++]; | |
916 | LC0 = [sp++]; | |
917 | P2 = [sp++]; | |
918 | P3 = [sp++]; | |
8d6c2420 | 919 | jump _bfin_return_from_exception; |
337d390b | 920 | ENDPROC(_ex_trace_buff_full) |
518039bc RG |
921 | |
922 | #if CONFIG_DEBUG_BFIN_HWTRACE_EXPAND_LEN == 4 | |
923 | .data | |
924 | #else | |
925 | .section .l1.data.B | |
337d390b | 926 | #endif /* CONFIG_DEBUG_BFIN_HWTRACE_EXPAND_LEN */ |
518039bc RG |
927 | ENTRY(_trace_buff_offset) |
928 | .long 0; | |
929 | ALIGN | |
930 | ENTRY(_software_trace_buff) | |
931 | .rept ((1 << CONFIG_DEBUG_BFIN_HWTRACE_EXPAND_LEN)*256); | |
932 | .long 0 | |
933 | .endr | |
337d390b RG |
934 | #endif /* CONFIG_DEBUG_BFIN_HWTRACE_EXPAND */ |
935 | ||
936 | #if CONFIG_EARLY_PRINTK | |
9cb07b23 | 937 | __INIT |
337d390b RG |
938 | ENTRY(_early_trap) |
939 | SAVE_ALL_SYS | |
940 | trace_buffer_stop(p0,r0); | |
941 | ||
942 | /* Turn caches off, to ensure we don't get double exceptions */ | |
943 | ||
944 | P4.L = LO(IMEM_CONTROL); | |
945 | P4.H = HI(IMEM_CONTROL); | |
946 | ||
947 | R5 = [P4]; /* Control Register*/ | |
948 | BITCLR(R5,ENICPLB_P); | |
949 | CLI R1; | |
950 | SSYNC; /* SSYNC required before writing to IMEM_CONTROL. */ | |
951 | .align 8; | |
952 | [P4] = R5; | |
953 | SSYNC; | |
954 | ||
955 | P4.L = LO(DMEM_CONTROL); | |
956 | P4.H = HI(DMEM_CONTROL); | |
957 | R5 = [P4]; | |
958 | BITCLR(R5,ENDCPLB_P); | |
959 | SSYNC; /* SSYNC required before writing to DMEM_CONTROL. */ | |
960 | .align 8; | |
961 | [P4] = R5; | |
962 | SSYNC; | |
963 | STI R1; | |
964 | ||
965 | r0 = sp; /* stack frame pt_regs pointer argument ==> r0 */ | |
966 | r1 = RETX; | |
967 | ||
968 | SP += -12; | |
969 | call _early_trap_c; | |
970 | SP += 12; | |
971 | ENDPROC(_early_trap) | |
9cb07b23 | 972 | __FINIT |
337d390b | 973 | #endif /* CONFIG_EARLY_PRINTK */ |
518039bc | 974 | |
1394f032 BW |
975 | /* |
976 | * Put these in the kernel data section - that should always be covered by | |
977 | * a CPLB. This is needed to ensure we don't get double fault conditions | |
978 | */ | |
979 | ||
980 | #ifdef CONFIG_SYSCALL_TAB_L1 | |
981 | .section .l1.data | |
982 | #else | |
983 | .data | |
984 | #endif | |
f26fbc48 | 985 | |
1ffe6646 | 986 | ENTRY(_ex_table) |
1394f032 | 987 | /* entry for each EXCAUSE[5:0] |
9401e618 | 988 | * This table must be in sync with the table in ./kernel/traps.c |
1394f032 BW |
989 | * EXCPT instruction can provide 4 bits of EXCAUSE, allowing 16 to be user defined |
990 | */ | |
1ffe6646 | 991 | .long _ex_syscall /* 0x00 - User Defined - Linux Syscall */ |
1394f032 | 992 | .long _ex_soft_bp /* 0x01 - User Defined - Software breakpoint */ |
1ffe6646 | 993 | .long _ex_replaceable /* 0x02 - User Defined */ |
9401e618 | 994 | .long _ex_trap_c /* 0x03 - User Defined - userspace stack overflow */ |
9f336a53 | 995 | .long _ex_trap_c /* 0x04 - User Defined - dump trace buffer */ |
1ffe6646 MF |
996 | .long _ex_replaceable /* 0x05 - User Defined */ |
997 | .long _ex_replaceable /* 0x06 - User Defined */ | |
998 | .long _ex_replaceable /* 0x07 - User Defined */ | |
999 | .long _ex_replaceable /* 0x08 - User Defined */ | |
1000 | .long _ex_replaceable /* 0x09 - User Defined */ | |
1001 | .long _ex_replaceable /* 0x0A - User Defined */ | |
1002 | .long _ex_replaceable /* 0x0B - User Defined */ | |
1003 | .long _ex_replaceable /* 0x0C - User Defined */ | |
1004 | .long _ex_replaceable /* 0x0D - User Defined */ | |
1005 | .long _ex_replaceable /* 0x0E - User Defined */ | |
1006 | .long _ex_replaceable /* 0x0F - User Defined */ | |
1394f032 | 1007 | .long _ex_single_step /* 0x10 - HW Single step */ |
518039bc RG |
1008 | #ifdef CONFIG_DEBUG_BFIN_HWTRACE_EXPAND |
1009 | .long _ex_trace_buff_full /* 0x11 - Trace Buffer Full */ | |
1010 | #else | |
1394f032 | 1011 | .long _ex_trap_c /* 0x11 - Trace Buffer Full */ |
518039bc | 1012 | #endif |
1394f032 BW |
1013 | .long _ex_trap_c /* 0x12 - Reserved */ |
1014 | .long _ex_trap_c /* 0x13 - Reserved */ | |
1015 | .long _ex_trap_c /* 0x14 - Reserved */ | |
1016 | .long _ex_trap_c /* 0x15 - Reserved */ | |
1017 | .long _ex_trap_c /* 0x16 - Reserved */ | |
1018 | .long _ex_trap_c /* 0x17 - Reserved */ | |
1019 | .long _ex_trap_c /* 0x18 - Reserved */ | |
1020 | .long _ex_trap_c /* 0x19 - Reserved */ | |
1021 | .long _ex_trap_c /* 0x1A - Reserved */ | |
1022 | .long _ex_trap_c /* 0x1B - Reserved */ | |
1023 | .long _ex_trap_c /* 0x1C - Reserved */ | |
1024 | .long _ex_trap_c /* 0x1D - Reserved */ | |
1025 | .long _ex_trap_c /* 0x1E - Reserved */ | |
1026 | .long _ex_trap_c /* 0x1F - Reserved */ | |
1027 | .long _ex_trap_c /* 0x20 - Reserved */ | |
1028 | .long _ex_trap_c /* 0x21 - Undefined Instruction */ | |
1029 | .long _ex_trap_c /* 0x22 - Illegal Instruction Combination */ | |
f26fbc48 | 1030 | .long _ex_dviol /* 0x23 - Data CPLB Protection Violation */ |
1394f032 BW |
1031 | .long _ex_trap_c /* 0x24 - Data access misaligned */ |
1032 | .long _ex_trap_c /* 0x25 - Unrecoverable Event */ | |
f26fbc48 RG |
1033 | .long _ex_dmiss /* 0x26 - Data CPLB Miss */ |
1034 | .long _ex_dmult /* 0x27 - Data CPLB Multiple Hits - Linux Trap Zero */ | |
1394f032 BW |
1035 | .long _ex_trap_c /* 0x28 - Emulation Watchpoint */ |
1036 | .long _ex_trap_c /* 0x29 - Instruction fetch access error (535 only) */ | |
1037 | .long _ex_trap_c /* 0x2A - Instruction fetch misaligned */ | |
f26fbc48 RG |
1038 | .long _ex_trap_c /* 0x2B - Instruction CPLB protection Violation */ |
1039 | .long _ex_icplb_miss /* 0x2C - Instruction CPLB miss */ | |
1394f032 BW |
1040 | .long _ex_trap_c /* 0x2D - Instruction CPLB Multiple Hits */ |
1041 | .long _ex_trap_c /* 0x2E - Illegal use of Supervisor Resource */ | |
1042 | .long _ex_trap_c /* 0x2E - Illegal use of Supervisor Resource */ | |
1043 | .long _ex_trap_c /* 0x2F - Reserved */ | |
1044 | .long _ex_trap_c /* 0x30 - Reserved */ | |
1045 | .long _ex_trap_c /* 0x31 - Reserved */ | |
1046 | .long _ex_trap_c /* 0x32 - Reserved */ | |
1047 | .long _ex_trap_c /* 0x33 - Reserved */ | |
1048 | .long _ex_trap_c /* 0x34 - Reserved */ | |
1049 | .long _ex_trap_c /* 0x35 - Reserved */ | |
1050 | .long _ex_trap_c /* 0x36 - Reserved */ | |
1051 | .long _ex_trap_c /* 0x37 - Reserved */ | |
1052 | .long _ex_trap_c /* 0x38 - Reserved */ | |
1053 | .long _ex_trap_c /* 0x39 - Reserved */ | |
1054 | .long _ex_trap_c /* 0x3A - Reserved */ | |
1055 | .long _ex_trap_c /* 0x3B - Reserved */ | |
1056 | .long _ex_trap_c /* 0x3C - Reserved */ | |
1057 | .long _ex_trap_c /* 0x3D - Reserved */ | |
1058 | .long _ex_trap_c /* 0x3E - Reserved */ | |
1059 | .long _ex_trap_c /* 0x3F - Reserved */ | |
1ffe6646 | 1060 | END(_ex_table) |
1394f032 | 1061 | |
1394f032 | 1062 | ENTRY(_sys_call_table) |
0b95f22b | 1063 | .long _sys_restart_syscall /* 0 */ |
1394f032 BW |
1064 | .long _sys_exit |
1065 | .long _sys_fork | |
1066 | .long _sys_read | |
1067 | .long _sys_write | |
1068 | .long _sys_open /* 5 */ | |
1069 | .long _sys_close | |
1070 | .long _sys_ni_syscall /* old waitpid */ | |
1071 | .long _sys_creat | |
1072 | .long _sys_link | |
1073 | .long _sys_unlink /* 10 */ | |
1074 | .long _sys_execve | |
1075 | .long _sys_chdir | |
1076 | .long _sys_time | |
1077 | .long _sys_mknod | |
1078 | .long _sys_chmod /* 15 */ | |
1079 | .long _sys_chown /* chown16 */ | |
1080 | .long _sys_ni_syscall /* old break syscall holder */ | |
1081 | .long _sys_ni_syscall /* old stat */ | |
1082 | .long _sys_lseek | |
1083 | .long _sys_getpid /* 20 */ | |
1084 | .long _sys_mount | |
1085 | .long _sys_ni_syscall /* old umount */ | |
1086 | .long _sys_setuid | |
1087 | .long _sys_getuid | |
1088 | .long _sys_stime /* 25 */ | |
1089 | .long _sys_ptrace | |
1090 | .long _sys_alarm | |
1091 | .long _sys_ni_syscall /* old fstat */ | |
1092 | .long _sys_pause | |
1093 | .long _sys_ni_syscall /* old utime */ /* 30 */ | |
1094 | .long _sys_ni_syscall /* old stty syscall holder */ | |
1095 | .long _sys_ni_syscall /* old gtty syscall holder */ | |
1096 | .long _sys_access | |
1097 | .long _sys_nice | |
1098 | .long _sys_ni_syscall /* 35 */ /* old ftime syscall holder */ | |
1099 | .long _sys_sync | |
1100 | .long _sys_kill | |
1101 | .long _sys_rename | |
1102 | .long _sys_mkdir | |
1103 | .long _sys_rmdir /* 40 */ | |
1104 | .long _sys_dup | |
1105 | .long _sys_pipe | |
1106 | .long _sys_times | |
1107 | .long _sys_ni_syscall /* old prof syscall holder */ | |
1108 | .long _sys_brk /* 45 */ | |
1109 | .long _sys_setgid | |
1110 | .long _sys_getgid | |
1111 | .long _sys_ni_syscall /* old sys_signal */ | |
1112 | .long _sys_geteuid /* geteuid16 */ | |
1113 | .long _sys_getegid /* getegid16 */ /* 50 */ | |
1114 | .long _sys_acct | |
1115 | .long _sys_umount /* recycled never used phys() */ | |
1116 | .long _sys_ni_syscall /* old lock syscall holder */ | |
1117 | .long _sys_ioctl | |
1118 | .long _sys_fcntl /* 55 */ | |
1119 | .long _sys_ni_syscall /* old mpx syscall holder */ | |
1120 | .long _sys_setpgid | |
1121 | .long _sys_ni_syscall /* old ulimit syscall holder */ | |
1122 | .long _sys_ni_syscall /* old old uname */ | |
1123 | .long _sys_umask /* 60 */ | |
1124 | .long _sys_chroot | |
1125 | .long _sys_ustat | |
1126 | .long _sys_dup2 | |
1127 | .long _sys_getppid | |
1128 | .long _sys_getpgrp /* 65 */ | |
1129 | .long _sys_setsid | |
1130 | .long _sys_ni_syscall /* old sys_sigaction */ | |
1131 | .long _sys_sgetmask | |
1132 | .long _sys_ssetmask | |
1133 | .long _sys_setreuid /* setreuid16 */ /* 70 */ | |
1134 | .long _sys_setregid /* setregid16 */ | |
1135 | .long _sys_ni_syscall /* old sys_sigsuspend */ | |
1136 | .long _sys_ni_syscall /* old sys_sigpending */ | |
1137 | .long _sys_sethostname | |
1138 | .long _sys_setrlimit /* 75 */ | |
1139 | .long _sys_ni_syscall /* old getrlimit */ | |
1140 | .long _sys_getrusage | |
1141 | .long _sys_gettimeofday | |
1142 | .long _sys_settimeofday | |
1143 | .long _sys_getgroups /* getgroups16 */ /* 80 */ | |
1144 | .long _sys_setgroups /* setgroups16 */ | |
1145 | .long _sys_ni_syscall /* old_select */ | |
1146 | .long _sys_symlink | |
1147 | .long _sys_ni_syscall /* old lstat */ | |
1148 | .long _sys_readlink /* 85 */ | |
1149 | .long _sys_uselib | |
1150 | .long _sys_ni_syscall /* sys_swapon */ | |
1151 | .long _sys_reboot | |
1152 | .long _sys_ni_syscall /* old_readdir */ | |
1153 | .long _sys_ni_syscall /* sys_mmap */ /* 90 */ | |
1154 | .long _sys_munmap | |
1155 | .long _sys_truncate | |
1156 | .long _sys_ftruncate | |
1157 | .long _sys_fchmod | |
1158 | .long _sys_fchown /* fchown16 */ /* 95 */ | |
1159 | .long _sys_getpriority | |
1160 | .long _sys_setpriority | |
1161 | .long _sys_ni_syscall /* old profil syscall holder */ | |
1162 | .long _sys_statfs | |
1163 | .long _sys_fstatfs /* 100 */ | |
1164 | .long _sys_ni_syscall | |
1165 | .long _sys_ni_syscall /* old sys_socketcall */ | |
1166 | .long _sys_syslog | |
1167 | .long _sys_setitimer | |
1168 | .long _sys_getitimer /* 105 */ | |
1169 | .long _sys_newstat | |
1170 | .long _sys_newlstat | |
1171 | .long _sys_newfstat | |
1172 | .long _sys_ni_syscall /* old uname */ | |
1173 | .long _sys_ni_syscall /* iopl for i386 */ /* 110 */ | |
1174 | .long _sys_vhangup | |
1175 | .long _sys_ni_syscall /* obsolete idle() syscall */ | |
1176 | .long _sys_ni_syscall /* vm86old for i386 */ | |
1177 | .long _sys_wait4 | |
1178 | .long _sys_ni_syscall /* 115 */ /* sys_swapoff */ | |
1179 | .long _sys_sysinfo | |
1180 | .long _sys_ni_syscall /* old sys_ipc */ | |
1181 | .long _sys_fsync | |
1182 | .long _sys_ni_syscall /* old sys_sigreturn */ | |
1183 | .long _sys_clone /* 120 */ | |
1184 | .long _sys_setdomainname | |
1185 | .long _sys_newuname | |
1186 | .long _sys_ni_syscall /* old sys_modify_ldt */ | |
1187 | .long _sys_adjtimex | |
1188 | .long _sys_ni_syscall /* 125 */ /* sys_mprotect */ | |
1189 | .long _sys_ni_syscall /* old sys_sigprocmask */ | |
1190 | .long _sys_ni_syscall /* old "creat_module" */ | |
1191 | .long _sys_init_module | |
1192 | .long _sys_delete_module | |
1193 | .long _sys_ni_syscall /* 130: old "get_kernel_syms" */ | |
1194 | .long _sys_quotactl | |
1195 | .long _sys_getpgid | |
1196 | .long _sys_fchdir | |
1197 | .long _sys_bdflush | |
1198 | .long _sys_ni_syscall /* 135 */ /* sys_sysfs */ | |
1199 | .long _sys_personality | |
1200 | .long _sys_ni_syscall /* for afs_syscall */ | |
1201 | .long _sys_setfsuid /* setfsuid16 */ | |
1202 | .long _sys_setfsgid /* setfsgid16 */ | |
1203 | .long _sys_llseek /* 140 */ | |
1204 | .long _sys_getdents | |
1205 | .long _sys_ni_syscall /* sys_select */ | |
1206 | .long _sys_flock | |
1207 | .long _sys_ni_syscall /* sys_msync */ | |
1208 | .long _sys_readv /* 145 */ | |
1209 | .long _sys_writev | |
1210 | .long _sys_getsid | |
1211 | .long _sys_fdatasync | |
1212 | .long _sys_sysctl | |
1213 | .long _sys_ni_syscall /* 150 */ /* sys_mlock */ | |
1214 | .long _sys_ni_syscall /* sys_munlock */ | |
1215 | .long _sys_ni_syscall /* sys_mlockall */ | |
1216 | .long _sys_ni_syscall /* sys_munlockall */ | |
1217 | .long _sys_sched_setparam | |
1218 | .long _sys_sched_getparam /* 155 */ | |
1219 | .long _sys_sched_setscheduler | |
1220 | .long _sys_sched_getscheduler | |
1221 | .long _sys_sched_yield | |
1222 | .long _sys_sched_get_priority_max | |
1223 | .long _sys_sched_get_priority_min /* 160 */ | |
1224 | .long _sys_sched_rr_get_interval | |
1225 | .long _sys_nanosleep | |
0b95f22b | 1226 | .long _sys_mremap |
1394f032 BW |
1227 | .long _sys_setresuid /* setresuid16 */ |
1228 | .long _sys_getresuid /* getresuid16 */ /* 165 */ | |
1229 | .long _sys_ni_syscall /* for vm86 */ | |
1230 | .long _sys_ni_syscall /* old "query_module" */ | |
1231 | .long _sys_ni_syscall /* sys_poll */ | |
0b95f22b | 1232 | .long _sys_nfsservctl |
1394f032 BW |
1233 | .long _sys_setresgid /* setresgid16 */ /* 170 */ |
1234 | .long _sys_getresgid /* getresgid16 */ | |
1235 | .long _sys_prctl | |
1236 | .long _sys_rt_sigreturn | |
1237 | .long _sys_rt_sigaction | |
1238 | .long _sys_rt_sigprocmask /* 175 */ | |
1239 | .long _sys_rt_sigpending | |
1240 | .long _sys_rt_sigtimedwait | |
1241 | .long _sys_rt_sigqueueinfo | |
1242 | .long _sys_rt_sigsuspend | |
1243 | .long _sys_pread64 /* 180 */ | |
1244 | .long _sys_pwrite64 | |
1245 | .long _sys_lchown /* lchown16 */ | |
1246 | .long _sys_getcwd | |
1247 | .long _sys_capget | |
1248 | .long _sys_capset /* 185 */ | |
1249 | .long _sys_sigaltstack | |
1250 | .long _sys_sendfile | |
1251 | .long _sys_ni_syscall /* streams1 */ | |
1252 | .long _sys_ni_syscall /* streams2 */ | |
1253 | .long _sys_vfork /* 190 */ | |
1254 | .long _sys_getrlimit | |
1255 | .long _sys_mmap2 | |
1256 | .long _sys_truncate64 | |
1257 | .long _sys_ftruncate64 | |
1258 | .long _sys_stat64 /* 195 */ | |
1259 | .long _sys_lstat64 | |
1260 | .long _sys_fstat64 | |
1261 | .long _sys_chown | |
1262 | .long _sys_getuid | |
1263 | .long _sys_getgid /* 200 */ | |
1264 | .long _sys_geteuid | |
1265 | .long _sys_getegid | |
1266 | .long _sys_setreuid | |
1267 | .long _sys_setregid | |
1268 | .long _sys_getgroups /* 205 */ | |
1269 | .long _sys_setgroups | |
1270 | .long _sys_fchown | |
1271 | .long _sys_setresuid | |
1272 | .long _sys_getresuid | |
1273 | .long _sys_setresgid /* 210 */ | |
1274 | .long _sys_getresgid | |
1275 | .long _sys_lchown | |
1276 | .long _sys_setuid | |
1277 | .long _sys_setgid | |
1278 | .long _sys_setfsuid /* 215 */ | |
1279 | .long _sys_setfsgid | |
1280 | .long _sys_pivot_root | |
1281 | .long _sys_ni_syscall /* sys_mincore */ | |
1282 | .long _sys_ni_syscall /* sys_madvise */ | |
1283 | .long _sys_getdents64 /* 220 */ | |
1284 | .long _sys_fcntl64 | |
1285 | .long _sys_ni_syscall /* reserved for TUX */ | |
1286 | .long _sys_ni_syscall | |
1287 | .long _sys_gettid | |
0b95f22b | 1288 | .long _sys_readahead /* 225 */ |
1394f032 BW |
1289 | .long _sys_setxattr |
1290 | .long _sys_lsetxattr | |
1291 | .long _sys_fsetxattr | |
1292 | .long _sys_getxattr | |
1293 | .long _sys_lgetxattr /* 230 */ | |
1294 | .long _sys_fgetxattr | |
1295 | .long _sys_listxattr | |
1296 | .long _sys_llistxattr | |
1297 | .long _sys_flistxattr | |
1298 | .long _sys_removexattr /* 235 */ | |
1299 | .long _sys_lremovexattr | |
1300 | .long _sys_fremovexattr | |
1301 | .long _sys_tkill | |
1302 | .long _sys_sendfile64 | |
1303 | .long _sys_futex /* 240 */ | |
1304 | .long _sys_sched_setaffinity | |
1305 | .long _sys_sched_getaffinity | |
1306 | .long _sys_ni_syscall /* sys_set_thread_area */ | |
1307 | .long _sys_ni_syscall /* sys_get_thread_area */ | |
1308 | .long _sys_io_setup /* 245 */ | |
1309 | .long _sys_io_destroy | |
1310 | .long _sys_io_getevents | |
1311 | .long _sys_io_submit | |
1312 | .long _sys_io_cancel | |
1313 | .long _sys_ni_syscall /* 250 */ /* sys_alloc_hugepages */ | |
1314 | .long _sys_ni_syscall /* sys_freec_hugepages */ | |
1315 | .long _sys_exit_group | |
1316 | .long _sys_lookup_dcookie | |
1317 | .long _sys_bfin_spinlock | |
1318 | .long _sys_epoll_create /* 255 */ | |
1319 | .long _sys_epoll_ctl | |
1320 | .long _sys_epoll_wait | |
1321 | .long _sys_ni_syscall /* remap_file_pages */ | |
1322 | .long _sys_set_tid_address | |
1323 | .long _sys_timer_create /* 260 */ | |
1324 | .long _sys_timer_settime | |
1325 | .long _sys_timer_gettime | |
1326 | .long _sys_timer_getoverrun | |
1327 | .long _sys_timer_delete | |
1328 | .long _sys_clock_settime /* 265 */ | |
1329 | .long _sys_clock_gettime | |
1330 | .long _sys_clock_getres | |
1331 | .long _sys_clock_nanosleep | |
1332 | .long _sys_statfs64 | |
1333 | .long _sys_fstatfs64 /* 270 */ | |
1334 | .long _sys_tgkill | |
1335 | .long _sys_utimes | |
1336 | .long _sys_fadvise64_64 | |
1337 | .long _sys_ni_syscall /* vserver */ | |
1338 | .long _sys_ni_syscall /* 275, mbind */ | |
1339 | .long _sys_ni_syscall /* get_mempolicy */ | |
1340 | .long _sys_ni_syscall /* set_mempolicy */ | |
1341 | .long _sys_mq_open | |
1342 | .long _sys_mq_unlink | |
1343 | .long _sys_mq_timedsend /* 280 */ | |
1344 | .long _sys_mq_timedreceive | |
1345 | .long _sys_mq_notify | |
1346 | .long _sys_mq_getsetattr | |
1347 | .long _sys_ni_syscall /* kexec_load */ | |
1348 | .long _sys_waitid /* 285 */ | |
1349 | .long _sys_add_key | |
1350 | .long _sys_request_key | |
1351 | .long _sys_keyctl | |
1352 | .long _sys_ioprio_set | |
1353 | .long _sys_ioprio_get /* 290 */ | |
1354 | .long _sys_inotify_init | |
1355 | .long _sys_inotify_add_watch | |
1356 | .long _sys_inotify_rm_watch | |
1357 | .long _sys_ni_syscall /* migrate_pages */ | |
1358 | .long _sys_openat /* 295 */ | |
1359 | .long _sys_mkdirat | |
1360 | .long _sys_mknodat | |
1361 | .long _sys_fchownat | |
1362 | .long _sys_futimesat | |
1363 | .long _sys_fstatat64 /* 300 */ | |
1364 | .long _sys_unlinkat | |
1365 | .long _sys_renameat | |
1366 | .long _sys_linkat | |
1367 | .long _sys_symlinkat | |
1368 | .long _sys_readlinkat /* 305 */ | |
1369 | .long _sys_fchmodat | |
1370 | .long _sys_faccessat | |
1371 | .long _sys_pselect6 | |
1372 | .long _sys_ppoll | |
1373 | .long _sys_unshare /* 310 */ | |
1374 | .long _sys_sram_alloc | |
1375 | .long _sys_sram_free | |
1376 | .long _sys_dma_memcpy | |
1377 | .long _sys_accept | |
1378 | .long _sys_bind /* 315 */ | |
1379 | .long _sys_connect | |
1380 | .long _sys_getpeername | |
1381 | .long _sys_getsockname | |
1382 | .long _sys_getsockopt | |
1383 | .long _sys_listen /* 320 */ | |
1384 | .long _sys_recv | |
1385 | .long _sys_recvfrom | |
1386 | .long _sys_recvmsg | |
1387 | .long _sys_send | |
1388 | .long _sys_sendmsg /* 325 */ | |
1389 | .long _sys_sendto | |
1390 | .long _sys_setsockopt | |
1391 | .long _sys_shutdown | |
1392 | .long _sys_socket | |
1393 | .long _sys_socketpair /* 330 */ | |
1394 | .long _sys_semctl | |
1395 | .long _sys_semget | |
1396 | .long _sys_semop | |
1397 | .long _sys_msgctl | |
1398 | .long _sys_msgget /* 335 */ | |
1399 | .long _sys_msgrcv | |
1400 | .long _sys_msgsnd | |
1401 | .long _sys_shmat | |
1402 | .long _sys_shmctl | |
1403 | .long _sys_shmdt /* 340 */ | |
1404 | .long _sys_shmget | |
0b95f22b BW |
1405 | .long _sys_splice |
1406 | .long _sys_sync_file_range | |
1407 | .long _sys_tee | |
1408 | .long _sys_vmsplice /* 345 */ | |
1409 | .long _sys_epoll_pwait | |
1410 | .long _sys_utimensat | |
1411 | .long _sys_signalfd | |
2f775dba | 1412 | .long _sys_timerfd_create |
0b95f22b BW |
1413 | .long _sys_eventfd /* 350 */ |
1414 | .long _sys_pread64 | |
1415 | .long _sys_pwrite64 | |
1416 | .long _sys_fadvise64 | |
1417 | .long _sys_set_robust_list | |
1418 | .long _sys_get_robust_list /* 355 */ | |
1419 | .long _sys_fallocate | |
fc97551d | 1420 | .long _sys_semtimedop |
2f775dba BW |
1421 | .long _sys_timerfd_settime |
1422 | .long _sys_timerfd_gettime | |
1423 | ||
1394f032 BW |
1424 | .rept NR_syscalls-(.-_sys_call_table)/4 |
1425 | .long _sys_ni_syscall | |
1426 | .endr | |
0893f125 BS |
1427 | |
1428 | /* | |
1429 | * Used to save the real RETX, IMASK and SYSCFG when temporarily | |
1430 | * storing safe values across the transition from exception to IRQ5. | |
1431 | */ | |
1432 | _excpt_saved_stuff: | |
1433 | .long 0; | |
1434 | .long 0; | |
1394f032 BW |
1435 | .long 0; |
1436 | ||
1437 | _exception_stack: | |
1438 | .rept 1024 | |
1439 | .long 0; | |
1440 | .endr | |
1441 | _exception_stack_top: | |
1442 | ||
1aafd909 | 1443 | #if ANOMALY_05000261 |
1394f032 BW |
1444 | /* Used by the assembly entry point to work around an anomaly. */ |
1445 | _last_cplb_fault_retx: | |
1446 | .long 0; | |
1447 | #endif |