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0a808a31 | 1 | /* arch/sparc/kernel/entry.S: Sparc trap low-level entry points. |
1da177e4 | 2 | * |
0a808a31 | 3 | * Copyright (C) 1995, 2007 David S. Miller (davem@davemloft.net) |
1da177e4 LT |
4 | * Copyright (C) 1996 Eddie C. Dost (ecd@skynet.be) |
5 | * Copyright (C) 1996 Miguel de Icaza (miguel@nuclecu.unam.mx) | |
6 | * Copyright (C) 1996-1999 Jakub Jelinek (jj@sunsite.mff.cuni.cz) | |
7 | * Copyright (C) 1997 Anton Blanchard (anton@progsoc.uts.edu.au) | |
8 | */ | |
9 | ||
1da177e4 LT |
10 | #include <linux/errno.h> |
11 | ||
12 | #include <asm/head.h> | |
13 | #include <asm/asi.h> | |
14 | #include <asm/smp.h> | |
1da177e4 LT |
15 | #include <asm/contregs.h> |
16 | #include <asm/ptrace.h> | |
47003497 | 17 | #include <asm/asm-offsets.h> |
1da177e4 LT |
18 | #include <asm/psr.h> |
19 | #include <asm/vaddrs.h> | |
20 | #include <asm/memreg.h> | |
21 | #include <asm/page.h> | |
b1a8bf92 | 22 | #include <asm/pgtable.h> |
1da177e4 | 23 | #include <asm/pgtsun4c.h> |
1da177e4 LT |
24 | #include <asm/winmacro.h> |
25 | #include <asm/signal.h> | |
26 | #include <asm/obio.h> | |
27 | #include <asm/mxcc.h> | |
28 | #include <asm/thread_info.h> | |
29 | #include <asm/param.h> | |
59359ff8 | 30 | #include <asm/unistd.h> |
1da177e4 LT |
31 | |
32 | #include <asm/asmmacro.h> | |
33 | ||
34 | #define curptr g6 | |
35 | ||
1da177e4 LT |
36 | /* These are just handy. */ |
37 | #define _SV save %sp, -STACKFRAME_SZ, %sp | |
38 | #define _RS restore | |
39 | ||
40 | #define FLUSH_ALL_KERNEL_WINDOWS \ | |
41 | _SV; _SV; _SV; _SV; _SV; _SV; _SV; \ | |
42 | _RS; _RS; _RS; _RS; _RS; _RS; _RS; | |
43 | ||
1da177e4 | 44 | .text |
1da177e4 | 45 | |
e2fdd7fd DM |
46 | #ifdef CONFIG_KGDB |
47 | .align 4 | |
48 | .globl arch_kgdb_breakpoint | |
49 | .type arch_kgdb_breakpoint,#function | |
50 | arch_kgdb_breakpoint: | |
51 | ta 0x7d | |
52 | retl | |
53 | nop | |
54 | .size arch_kgdb_breakpoint,.-arch_kgdb_breakpoint | |
1da177e4 LT |
55 | #endif |
56 | ||
0a808a31 | 57 | #if defined(CONFIG_BLK_DEV_FD) || defined(CONFIG_BLK_DEV_FD_MODULE) |
1da177e4 LT |
58 | .align 4 |
59 | .globl floppy_hardint | |
60 | floppy_hardint: | |
61 | /* | |
62 | * This code cannot touch registers %l0 %l1 and %l2 | |
63 | * because SAVE_ALL depends on their values. It depends | |
64 | * on %l3 also, but we regenerate it before a call. | |
65 | * Other registers are: | |
66 | * %l3 -- base address of fdc registers | |
67 | * %l4 -- pdma_vaddr | |
68 | * %l5 -- scratch for ld/st address | |
69 | * %l6 -- pdma_size | |
70 | * %l7 -- scratch [floppy byte, ld/st address, aux. data] | |
71 | */ | |
72 | ||
73 | /* Do we have work to do? */ | |
74 | sethi %hi(doing_pdma), %l7 | |
75 | ld [%l7 + %lo(doing_pdma)], %l7 | |
76 | cmp %l7, 0 | |
77 | be floppy_dosoftint | |
78 | nop | |
79 | ||
80 | /* Load fdc register base */ | |
81 | sethi %hi(fdc_status), %l3 | |
82 | ld [%l3 + %lo(fdc_status)], %l3 | |
83 | ||
84 | /* Setup register addresses */ | |
85 | sethi %hi(pdma_vaddr), %l5 ! transfer buffer | |
86 | ld [%l5 + %lo(pdma_vaddr)], %l4 | |
87 | sethi %hi(pdma_size), %l5 ! bytes to go | |
88 | ld [%l5 + %lo(pdma_size)], %l6 | |
89 | next_byte: | |
90 | ldub [%l3], %l7 | |
91 | ||
92 | andcc %l7, 0x80, %g0 ! Does fifo still have data | |
93 | bz floppy_fifo_emptied ! fifo has been emptied... | |
94 | andcc %l7, 0x20, %g0 ! in non-dma mode still? | |
95 | bz floppy_overrun ! nope, overrun | |
96 | andcc %l7, 0x40, %g0 ! 0=write 1=read | |
97 | bz floppy_write | |
98 | sub %l6, 0x1, %l6 | |
99 | ||
100 | /* Ok, actually read this byte */ | |
101 | ldub [%l3 + 1], %l7 | |
102 | orcc %g0, %l6, %g0 | |
103 | stb %l7, [%l4] | |
104 | bne next_byte | |
105 | add %l4, 0x1, %l4 | |
106 | ||
107 | b floppy_tdone | |
108 | nop | |
109 | ||
110 | floppy_write: | |
111 | /* Ok, actually write this byte */ | |
112 | ldub [%l4], %l7 | |
113 | orcc %g0, %l6, %g0 | |
114 | stb %l7, [%l3 + 1] | |
115 | bne next_byte | |
116 | add %l4, 0x1, %l4 | |
117 | ||
118 | /* fall through... */ | |
119 | floppy_tdone: | |
120 | sethi %hi(pdma_vaddr), %l5 | |
121 | st %l4, [%l5 + %lo(pdma_vaddr)] | |
122 | sethi %hi(pdma_size), %l5 | |
123 | st %l6, [%l5 + %lo(pdma_size)] | |
124 | /* Flip terminal count pin */ | |
125 | set auxio_register, %l7 | |
126 | ld [%l7], %l7 | |
127 | ||
128 | set sparc_cpu_model, %l5 | |
129 | ld [%l5], %l5 | |
130 | subcc %l5, 1, %g0 /* enum { sun4c = 1 }; */ | |
131 | be 1f | |
132 | ldub [%l7], %l5 | |
133 | ||
134 | or %l5, 0xc2, %l5 | |
135 | stb %l5, [%l7] | |
136 | andn %l5, 0x02, %l5 | |
137 | b 2f | |
138 | nop | |
139 | ||
140 | 1: | |
141 | or %l5, 0xf4, %l5 | |
142 | stb %l5, [%l7] | |
143 | andn %l5, 0x04, %l5 | |
144 | ||
145 | 2: | |
146 | /* Kill some time so the bits set */ | |
147 | WRITE_PAUSE | |
148 | WRITE_PAUSE | |
149 | ||
150 | stb %l5, [%l7] | |
151 | ||
152 | /* Prevent recursion */ | |
153 | sethi %hi(doing_pdma), %l7 | |
154 | b floppy_dosoftint | |
155 | st %g0, [%l7 + %lo(doing_pdma)] | |
156 | ||
157 | /* We emptied the FIFO, but we haven't read everything | |
158 | * as of yet. Store the current transfer address and | |
159 | * bytes left to read so we can continue when the next | |
160 | * fast IRQ comes in. | |
161 | */ | |
162 | floppy_fifo_emptied: | |
163 | sethi %hi(pdma_vaddr), %l5 | |
164 | st %l4, [%l5 + %lo(pdma_vaddr)] | |
165 | sethi %hi(pdma_size), %l7 | |
166 | st %l6, [%l7 + %lo(pdma_size)] | |
167 | ||
168 | /* Restore condition codes */ | |
169 | wr %l0, 0x0, %psr | |
170 | WRITE_PAUSE | |
171 | ||
172 | jmp %l1 | |
173 | rett %l2 | |
174 | ||
175 | floppy_overrun: | |
176 | sethi %hi(pdma_vaddr), %l5 | |
177 | st %l4, [%l5 + %lo(pdma_vaddr)] | |
178 | sethi %hi(pdma_size), %l5 | |
179 | st %l6, [%l5 + %lo(pdma_size)] | |
180 | /* Prevent recursion */ | |
181 | sethi %hi(doing_pdma), %l7 | |
182 | st %g0, [%l7 + %lo(doing_pdma)] | |
183 | ||
184 | /* fall through... */ | |
185 | floppy_dosoftint: | |
186 | rd %wim, %l3 | |
187 | SAVE_ALL | |
188 | ||
189 | /* Set all IRQs off. */ | |
190 | or %l0, PSR_PIL, %l4 | |
191 | wr %l4, 0x0, %psr | |
192 | WRITE_PAUSE | |
193 | wr %l4, PSR_ET, %psr | |
194 | WRITE_PAUSE | |
195 | ||
196 | mov 11, %o0 ! floppy irq level (unused anyway) | |
197 | mov %g0, %o1 ! devid is not used in fast interrupts | |
198 | call sparc_floppy_irq | |
199 | add %sp, STACKFRAME_SZ, %o2 ! struct pt_regs *regs | |
200 | ||
201 | RESTORE_ALL | |
202 | ||
203 | #endif /* (CONFIG_BLK_DEV_FD) */ | |
204 | ||
205 | /* Bad trap handler */ | |
206 | .globl bad_trap_handler | |
207 | bad_trap_handler: | |
208 | SAVE_ALL | |
209 | ||
210 | wr %l0, PSR_ET, %psr | |
211 | WRITE_PAUSE | |
212 | ||
213 | add %sp, STACKFRAME_SZ, %o0 ! pt_regs | |
214 | call do_hw_interrupt | |
215 | mov %l7, %o1 ! trap number | |
216 | ||
217 | RESTORE_ALL | |
218 | ||
219 | /* For now all IRQ's not registered get sent here. handler_irq() will | |
220 | * see if a routine is registered to handle this interrupt and if not | |
221 | * it will say so on the console. | |
222 | */ | |
223 | ||
224 | .align 4 | |
225 | .globl real_irq_entry, patch_handler_irq | |
226 | real_irq_entry: | |
227 | SAVE_ALL | |
228 | ||
229 | #ifdef CONFIG_SMP | |
230 | .globl patchme_maybe_smp_msg | |
231 | ||
232 | cmp %l7, 12 | |
233 | patchme_maybe_smp_msg: | |
234 | bgu maybe_smp4m_msg | |
235 | nop | |
236 | #endif | |
237 | ||
238 | real_irq_continue: | |
239 | or %l0, PSR_PIL, %g2 | |
240 | wr %g2, 0x0, %psr | |
241 | WRITE_PAUSE | |
242 | wr %g2, PSR_ET, %psr | |
243 | WRITE_PAUSE | |
244 | mov %l7, %o0 ! irq level | |
245 | patch_handler_irq: | |
246 | call handler_irq | |
247 | add %sp, STACKFRAME_SZ, %o1 ! pt_regs ptr | |
248 | or %l0, PSR_PIL, %g2 ! restore PIL after handler_irq | |
249 | wr %g2, PSR_ET, %psr ! keep ET up | |
250 | WRITE_PAUSE | |
251 | ||
252 | RESTORE_ALL | |
253 | ||
254 | #ifdef CONFIG_SMP | |
255 | /* SMP per-cpu ticker interrupts are handled specially. */ | |
256 | smp4m_ticker: | |
257 | bne real_irq_continue+4 | |
258 | or %l0, PSR_PIL, %g2 | |
259 | wr %g2, 0x0, %psr | |
260 | WRITE_PAUSE | |
261 | wr %g2, PSR_ET, %psr | |
262 | WRITE_PAUSE | |
263 | call smp4m_percpu_timer_interrupt | |
264 | add %sp, STACKFRAME_SZ, %o0 | |
265 | wr %l0, PSR_ET, %psr | |
266 | WRITE_PAUSE | |
267 | RESTORE_ALL | |
268 | ||
269 | /* Here is where we check for possible SMP IPI passed to us | |
270 | * on some level other than 15 which is the NMI and only used | |
271 | * for cross calls. That has a separate entry point below. | |
272 | */ | |
273 | maybe_smp4m_msg: | |
274 | GET_PROCESSOR4M_ID(o3) | |
69c010b2 DM |
275 | sethi %hi(sun4m_irq_percpu), %l5 |
276 | sll %o3, 2, %o3 | |
277 | or %l5, %lo(sun4m_irq_percpu), %o5 | |
1da177e4 | 278 | sethi %hi(0x40000000), %o2 |
1da177e4 | 279 | ld [%o5 + %o3], %o1 |
69c010b2 DM |
280 | ld [%o1 + 0x00], %o3 ! sun4m_irq_percpu[cpu]->pending |
281 | andcc %o3, %o2, %g0 | |
1da177e4 LT |
282 | be,a smp4m_ticker |
283 | cmp %l7, 14 | |
69c010b2 | 284 | st %o2, [%o1 + 0x04] ! sun4m_irq_percpu[cpu]->clear=0x40000000 |
1da177e4 | 285 | WRITE_PAUSE |
69c010b2 | 286 | ld [%o1 + 0x00], %g0 ! sun4m_irq_percpu[cpu]->pending |
1da177e4 LT |
287 | WRITE_PAUSE |
288 | or %l0, PSR_PIL, %l4 | |
289 | wr %l4, 0x0, %psr | |
290 | WRITE_PAUSE | |
291 | wr %l4, PSR_ET, %psr | |
292 | WRITE_PAUSE | |
293 | call smp_reschedule_irq | |
294 | nop | |
295 | ||
296 | RESTORE_ALL | |
297 | ||
298 | .align 4 | |
299 | .globl linux_trap_ipi15_sun4m | |
300 | linux_trap_ipi15_sun4m: | |
301 | SAVE_ALL | |
302 | sethi %hi(0x80000000), %o2 | |
303 | GET_PROCESSOR4M_ID(o0) | |
69c010b2 DM |
304 | sethi %hi(sun4m_irq_percpu), %l5 |
305 | or %l5, %lo(sun4m_irq_percpu), %o5 | |
306 | sll %o0, 2, %o0 | |
307 | ld [%o5 + %o0], %o5 | |
308 | ld [%o5 + 0x00], %o3 ! sun4m_irq_percpu[cpu]->pending | |
1da177e4 LT |
309 | andcc %o3, %o2, %g0 |
310 | be 1f ! Must be an NMI async memory error | |
69c010b2 | 311 | st %o2, [%o5 + 0x04] ! sun4m_irq_percpu[cpu]->clear=0x80000000 |
1da177e4 | 312 | WRITE_PAUSE |
69c010b2 | 313 | ld [%o5 + 0x00], %g0 ! sun4m_irq_percpu[cpu]->pending |
1da177e4 LT |
314 | WRITE_PAUSE |
315 | or %l0, PSR_PIL, %l4 | |
316 | wr %l4, 0x0, %psr | |
317 | WRITE_PAUSE | |
318 | wr %l4, PSR_ET, %psr | |
319 | WRITE_PAUSE | |
320 | call smp4m_cross_call_irq | |
321 | nop | |
322 | b ret_trap_lockless_ipi | |
323 | clr %l6 | |
324 | 1: | |
325 | /* NMI async memory error handling. */ | |
326 | sethi %hi(0x80000000), %l4 | |
69c010b2 DM |
327 | sethi %hi(sun4m_irq_global), %o5 |
328 | ld [%o5 + %lo(sun4m_irq_global)], %l5 | |
329 | st %l4, [%l5 + 0x0c] ! sun4m_irq_global->mask_set=0x80000000 | |
1da177e4 | 330 | WRITE_PAUSE |
69c010b2 | 331 | ld [%l5 + 0x00], %g0 ! sun4m_irq_global->pending |
1da177e4 LT |
332 | WRITE_PAUSE |
333 | or %l0, PSR_PIL, %l4 | |
334 | wr %l4, 0x0, %psr | |
335 | WRITE_PAUSE | |
336 | wr %l4, PSR_ET, %psr | |
337 | WRITE_PAUSE | |
338 | call sun4m_nmi | |
339 | nop | |
69c010b2 | 340 | st %l4, [%l5 + 0x08] ! sun4m_irq_global->mask_clear=0x80000000 |
1da177e4 | 341 | WRITE_PAUSE |
69c010b2 | 342 | ld [%l5 + 0x00], %g0 ! sun4m_irq_global->pending |
1da177e4 LT |
343 | WRITE_PAUSE |
344 | RESTORE_ALL | |
345 | ||
346 | .globl smp4d_ticker | |
347 | /* SMP per-cpu ticker interrupts are handled specially. */ | |
348 | smp4d_ticker: | |
349 | SAVE_ALL | |
350 | or %l0, PSR_PIL, %g2 | |
351 | sethi %hi(CC_ICLR), %o0 | |
352 | sethi %hi(1 << 14), %o1 | |
353 | or %o0, %lo(CC_ICLR), %o0 | |
354 | stha %o1, [%o0] ASI_M_MXCC /* Clear PIL 14 in MXCC's ICLR */ | |
355 | wr %g2, 0x0, %psr | |
356 | WRITE_PAUSE | |
357 | wr %g2, PSR_ET, %psr | |
358 | WRITE_PAUSE | |
359 | call smp4d_percpu_timer_interrupt | |
360 | add %sp, STACKFRAME_SZ, %o0 | |
361 | wr %l0, PSR_ET, %psr | |
362 | WRITE_PAUSE | |
363 | RESTORE_ALL | |
364 | ||
365 | .align 4 | |
366 | .globl linux_trap_ipi15_sun4d | |
367 | linux_trap_ipi15_sun4d: | |
368 | SAVE_ALL | |
369 | sethi %hi(CC_BASE), %o4 | |
370 | sethi %hi(MXCC_ERR_ME|MXCC_ERR_PEW|MXCC_ERR_ASE|MXCC_ERR_PEE), %o2 | |
371 | or %o4, (CC_EREG - CC_BASE), %o0 | |
372 | ldda [%o0] ASI_M_MXCC, %o0 | |
373 | andcc %o0, %o2, %g0 | |
374 | bne 1f | |
375 | sethi %hi(BB_STAT2), %o2 | |
376 | lduba [%o2] ASI_M_CTL, %o2 | |
377 | andcc %o2, BB_STAT2_MASK, %g0 | |
378 | bne 2f | |
379 | or %o4, (CC_ICLR - CC_BASE), %o0 | |
380 | sethi %hi(1 << 15), %o1 | |
381 | stha %o1, [%o0] ASI_M_MXCC /* Clear PIL 15 in MXCC's ICLR */ | |
382 | or %l0, PSR_PIL, %l4 | |
383 | wr %l4, 0x0, %psr | |
384 | WRITE_PAUSE | |
385 | wr %l4, PSR_ET, %psr | |
386 | WRITE_PAUSE | |
387 | call smp4d_cross_call_irq | |
388 | nop | |
389 | b ret_trap_lockless_ipi | |
390 | clr %l6 | |
391 | ||
392 | 1: /* MXCC error */ | |
393 | 2: /* BB error */ | |
394 | /* Disable PIL 15 */ | |
395 | set CC_IMSK, %l4 | |
396 | lduha [%l4] ASI_M_MXCC, %l5 | |
397 | sethi %hi(1 << 15), %l7 | |
398 | or %l5, %l7, %l5 | |
399 | stha %l5, [%l4] ASI_M_MXCC | |
400 | /* FIXME */ | |
401 | 1: b,a 1b | |
402 | ||
8401707f KE |
403 | #ifdef CONFIG_SPARC_LEON |
404 | ||
405 | .globl smpleon_ticker | |
406 | /* SMP per-cpu ticker interrupts are handled specially. */ | |
407 | smpleon_ticker: | |
408 | SAVE_ALL | |
409 | or %l0, PSR_PIL, %g2 | |
410 | wr %g2, 0x0, %psr | |
411 | WRITE_PAUSE | |
412 | wr %g2, PSR_ET, %psr | |
413 | WRITE_PAUSE | |
414 | call leon_percpu_timer_interrupt | |
415 | add %sp, STACKFRAME_SZ, %o0 | |
416 | wr %l0, PSR_ET, %psr | |
417 | WRITE_PAUSE | |
418 | RESTORE_ALL | |
419 | ||
420 | .align 4 | |
421 | .globl linux_trap_ipi15_leon | |
422 | linux_trap_ipi15_leon: | |
423 | SAVE_ALL | |
424 | or %l0, PSR_PIL, %l4 | |
425 | wr %l4, 0x0, %psr | |
426 | WRITE_PAUSE | |
427 | wr %l4, PSR_ET, %psr | |
428 | WRITE_PAUSE | |
429 | call leon_cross_call_irq | |
430 | nop | |
431 | b ret_trap_lockless_ipi | |
432 | clr %l6 | |
433 | ||
434 | #endif /* CONFIG_SPARC_LEON */ | |
435 | ||
1da177e4 LT |
436 | #endif /* CONFIG_SMP */ |
437 | ||
438 | /* This routine handles illegal instructions and privileged | |
439 | * instruction attempts from user code. | |
440 | */ | |
441 | .align 4 | |
442 | .globl bad_instruction | |
443 | bad_instruction: | |
444 | sethi %hi(0xc1f80000), %l4 | |
445 | ld [%l1], %l5 | |
446 | sethi %hi(0x81d80000), %l7 | |
447 | and %l5, %l4, %l5 | |
448 | cmp %l5, %l7 | |
449 | be 1f | |
450 | SAVE_ALL | |
451 | ||
452 | wr %l0, PSR_ET, %psr ! re-enable traps | |
453 | WRITE_PAUSE | |
454 | ||
455 | add %sp, STACKFRAME_SZ, %o0 | |
456 | mov %l1, %o1 | |
457 | mov %l2, %o2 | |
458 | call do_illegal_instruction | |
459 | mov %l0, %o3 | |
460 | ||
461 | RESTORE_ALL | |
462 | ||
463 | 1: /* unimplemented flush - just skip */ | |
464 | jmpl %l2, %g0 | |
465 | rett %l2 + 4 | |
466 | ||
467 | .align 4 | |
468 | .globl priv_instruction | |
469 | priv_instruction: | |
470 | SAVE_ALL | |
471 | ||
472 | wr %l0, PSR_ET, %psr | |
473 | WRITE_PAUSE | |
474 | ||
475 | add %sp, STACKFRAME_SZ, %o0 | |
476 | mov %l1, %o1 | |
477 | mov %l2, %o2 | |
478 | call do_priv_instruction | |
479 | mov %l0, %o3 | |
480 | ||
481 | RESTORE_ALL | |
482 | ||
483 | /* This routine handles unaligned data accesses. */ | |
484 | .align 4 | |
485 | .globl mna_handler | |
486 | mna_handler: | |
487 | andcc %l0, PSR_PS, %g0 | |
488 | be mna_fromuser | |
489 | nop | |
490 | ||
491 | SAVE_ALL | |
492 | ||
493 | wr %l0, PSR_ET, %psr | |
494 | WRITE_PAUSE | |
495 | ||
496 | ld [%l1], %o1 | |
497 | call kernel_unaligned_trap | |
498 | add %sp, STACKFRAME_SZ, %o0 | |
499 | ||
500 | RESTORE_ALL | |
501 | ||
502 | mna_fromuser: | |
503 | SAVE_ALL | |
504 | ||
505 | wr %l0, PSR_ET, %psr ! re-enable traps | |
506 | WRITE_PAUSE | |
507 | ||
508 | ld [%l1], %o1 | |
509 | call user_unaligned_trap | |
510 | add %sp, STACKFRAME_SZ, %o0 | |
511 | ||
512 | RESTORE_ALL | |
513 | ||
514 | /* This routine handles floating point disabled traps. */ | |
515 | .align 4 | |
516 | .globl fpd_trap_handler | |
517 | fpd_trap_handler: | |
518 | SAVE_ALL | |
519 | ||
520 | wr %l0, PSR_ET, %psr ! re-enable traps | |
521 | WRITE_PAUSE | |
522 | ||
523 | add %sp, STACKFRAME_SZ, %o0 | |
524 | mov %l1, %o1 | |
525 | mov %l2, %o2 | |
526 | call do_fpd_trap | |
527 | mov %l0, %o3 | |
528 | ||
529 | RESTORE_ALL | |
530 | ||
531 | /* This routine handles Floating Point Exceptions. */ | |
532 | .align 4 | |
533 | .globl fpe_trap_handler | |
534 | fpe_trap_handler: | |
535 | set fpsave_magic, %l5 | |
536 | cmp %l1, %l5 | |
537 | be 1f | |
538 | sethi %hi(fpsave), %l5 | |
539 | or %l5, %lo(fpsave), %l5 | |
540 | cmp %l1, %l5 | |
541 | bne 2f | |
542 | sethi %hi(fpsave_catch2), %l5 | |
543 | or %l5, %lo(fpsave_catch2), %l5 | |
544 | wr %l0, 0x0, %psr | |
545 | WRITE_PAUSE | |
546 | jmp %l5 | |
547 | rett %l5 + 4 | |
548 | 1: | |
549 | sethi %hi(fpsave_catch), %l5 | |
550 | or %l5, %lo(fpsave_catch), %l5 | |
551 | wr %l0, 0x0, %psr | |
552 | WRITE_PAUSE | |
553 | jmp %l5 | |
554 | rett %l5 + 4 | |
555 | ||
556 | 2: | |
557 | SAVE_ALL | |
558 | ||
559 | wr %l0, PSR_ET, %psr ! re-enable traps | |
560 | WRITE_PAUSE | |
561 | ||
562 | add %sp, STACKFRAME_SZ, %o0 | |
563 | mov %l1, %o1 | |
564 | mov %l2, %o2 | |
565 | call do_fpe_trap | |
566 | mov %l0, %o3 | |
567 | ||
568 | RESTORE_ALL | |
569 | ||
570 | /* This routine handles Tag Overflow Exceptions. */ | |
571 | .align 4 | |
572 | .globl do_tag_overflow | |
573 | do_tag_overflow: | |
574 | SAVE_ALL | |
575 | ||
576 | wr %l0, PSR_ET, %psr ! re-enable traps | |
577 | WRITE_PAUSE | |
578 | ||
579 | add %sp, STACKFRAME_SZ, %o0 | |
580 | mov %l1, %o1 | |
581 | mov %l2, %o2 | |
582 | call handle_tag_overflow | |
583 | mov %l0, %o3 | |
584 | ||
585 | RESTORE_ALL | |
586 | ||
587 | /* This routine handles Watchpoint Exceptions. */ | |
588 | .align 4 | |
589 | .globl do_watchpoint | |
590 | do_watchpoint: | |
591 | SAVE_ALL | |
592 | ||
593 | wr %l0, PSR_ET, %psr ! re-enable traps | |
594 | WRITE_PAUSE | |
595 | ||
596 | add %sp, STACKFRAME_SZ, %o0 | |
597 | mov %l1, %o1 | |
598 | mov %l2, %o2 | |
599 | call handle_watchpoint | |
600 | mov %l0, %o3 | |
601 | ||
602 | RESTORE_ALL | |
603 | ||
604 | /* This routine handles Register Access Exceptions. */ | |
605 | .align 4 | |
606 | .globl do_reg_access | |
607 | do_reg_access: | |
608 | SAVE_ALL | |
609 | ||
610 | wr %l0, PSR_ET, %psr ! re-enable traps | |
611 | WRITE_PAUSE | |
612 | ||
613 | add %sp, STACKFRAME_SZ, %o0 | |
614 | mov %l1, %o1 | |
615 | mov %l2, %o2 | |
616 | call handle_reg_access | |
617 | mov %l0, %o3 | |
618 | ||
619 | RESTORE_ALL | |
620 | ||
621 | /* This routine handles Co-Processor Disabled Exceptions. */ | |
622 | .align 4 | |
623 | .globl do_cp_disabled | |
624 | do_cp_disabled: | |
625 | SAVE_ALL | |
626 | ||
627 | wr %l0, PSR_ET, %psr ! re-enable traps | |
628 | WRITE_PAUSE | |
629 | ||
630 | add %sp, STACKFRAME_SZ, %o0 | |
631 | mov %l1, %o1 | |
632 | mov %l2, %o2 | |
633 | call handle_cp_disabled | |
634 | mov %l0, %o3 | |
635 | ||
636 | RESTORE_ALL | |
637 | ||
638 | /* This routine handles Co-Processor Exceptions. */ | |
639 | .align 4 | |
640 | .globl do_cp_exception | |
641 | do_cp_exception: | |
642 | SAVE_ALL | |
643 | ||
644 | wr %l0, PSR_ET, %psr ! re-enable traps | |
645 | WRITE_PAUSE | |
646 | ||
647 | add %sp, STACKFRAME_SZ, %o0 | |
648 | mov %l1, %o1 | |
649 | mov %l2, %o2 | |
650 | call handle_cp_exception | |
651 | mov %l0, %o3 | |
652 | ||
653 | RESTORE_ALL | |
654 | ||
655 | /* This routine handles Hardware Divide By Zero Exceptions. */ | |
656 | .align 4 | |
657 | .globl do_hw_divzero | |
658 | do_hw_divzero: | |
659 | SAVE_ALL | |
660 | ||
661 | wr %l0, PSR_ET, %psr ! re-enable traps | |
662 | WRITE_PAUSE | |
663 | ||
664 | add %sp, STACKFRAME_SZ, %o0 | |
665 | mov %l1, %o1 | |
666 | mov %l2, %o2 | |
667 | call handle_hw_divzero | |
668 | mov %l0, %o3 | |
669 | ||
670 | RESTORE_ALL | |
671 | ||
672 | .align 4 | |
673 | .globl do_flush_windows | |
674 | do_flush_windows: | |
675 | SAVE_ALL | |
676 | ||
677 | wr %l0, PSR_ET, %psr | |
678 | WRITE_PAUSE | |
679 | ||
680 | andcc %l0, PSR_PS, %g0 | |
681 | bne dfw_kernel | |
682 | nop | |
683 | ||
684 | call flush_user_windows | |
685 | nop | |
686 | ||
687 | /* Advance over the trap instruction. */ | |
688 | ld [%sp + STACKFRAME_SZ + PT_NPC], %l1 | |
689 | add %l1, 0x4, %l2 | |
690 | st %l1, [%sp + STACKFRAME_SZ + PT_PC] | |
691 | st %l2, [%sp + STACKFRAME_SZ + PT_NPC] | |
692 | ||
693 | RESTORE_ALL | |
694 | ||
695 | .globl flush_patch_one | |
696 | ||
697 | /* We get these for debugging routines using __builtin_return_address() */ | |
698 | dfw_kernel: | |
699 | flush_patch_one: | |
700 | FLUSH_ALL_KERNEL_WINDOWS | |
701 | ||
702 | /* Advance over the trap instruction. */ | |
703 | ld [%sp + STACKFRAME_SZ + PT_NPC], %l1 | |
704 | add %l1, 0x4, %l2 | |
705 | st %l1, [%sp + STACKFRAME_SZ + PT_PC] | |
706 | st %l2, [%sp + STACKFRAME_SZ + PT_NPC] | |
707 | ||
708 | RESTORE_ALL | |
709 | ||
710 | /* The getcc software trap. The user wants the condition codes from | |
711 | * the %psr in register %g1. | |
712 | */ | |
713 | ||
714 | .align 4 | |
715 | .globl getcc_trap_handler | |
716 | getcc_trap_handler: | |
717 | srl %l0, 20, %g1 ! give user | |
718 | and %g1, 0xf, %g1 ! only ICC bits in %psr | |
719 | jmp %l2 ! advance over trap instruction | |
720 | rett %l2 + 0x4 ! like this... | |
721 | ||
722 | /* The setcc software trap. The user has condition codes in %g1 | |
723 | * that it would like placed in the %psr. Be careful not to flip | |
724 | * any unintentional bits! | |
725 | */ | |
726 | ||
727 | .align 4 | |
728 | .globl setcc_trap_handler | |
729 | setcc_trap_handler: | |
730 | sll %g1, 0x14, %l4 | |
731 | set PSR_ICC, %l5 | |
732 | andn %l0, %l5, %l0 ! clear ICC bits in %psr | |
733 | and %l4, %l5, %l4 ! clear non-ICC bits in user value | |
734 | or %l4, %l0, %l4 ! or them in... mix mix mix | |
735 | ||
736 | wr %l4, 0x0, %psr ! set new %psr | |
737 | WRITE_PAUSE ! TI scumbags... | |
738 | ||
739 | jmp %l2 ! advance over trap instruction | |
740 | rett %l2 + 0x4 ! like this... | |
741 | ||
742 | .align 4 | |
743 | .globl linux_trap_nmi_sun4c | |
744 | linux_trap_nmi_sun4c: | |
745 | SAVE_ALL | |
746 | ||
747 | /* Ugh, we need to clear the IRQ line. This is now | |
748 | * a very sun4c specific trap handler... | |
749 | */ | |
750 | sethi %hi(interrupt_enable), %l5 | |
751 | ld [%l5 + %lo(interrupt_enable)], %l5 | |
752 | ldub [%l5], %l6 | |
753 | andn %l6, INTS_ENAB, %l6 | |
754 | stb %l6, [%l5] | |
755 | ||
756 | /* Now it is safe to re-enable traps without recursion. */ | |
757 | or %l0, PSR_PIL, %l0 | |
758 | wr %l0, PSR_ET, %psr | |
759 | WRITE_PAUSE | |
760 | ||
761 | /* Now call the c-code with the pt_regs frame ptr and the | |
762 | * memory error registers as arguments. The ordering chosen | |
763 | * here is due to unlatching semantics. | |
764 | */ | |
765 | sethi %hi(AC_SYNC_ERR), %o0 | |
766 | add %o0, 0x4, %o0 | |
767 | lda [%o0] ASI_CONTROL, %o2 ! sync vaddr | |
768 | sub %o0, 0x4, %o0 | |
769 | lda [%o0] ASI_CONTROL, %o1 ! sync error | |
770 | add %o0, 0xc, %o0 | |
771 | lda [%o0] ASI_CONTROL, %o4 ! async vaddr | |
772 | sub %o0, 0x4, %o0 | |
773 | lda [%o0] ASI_CONTROL, %o3 ! async error | |
774 | call sparc_lvl15_nmi | |
775 | add %sp, STACKFRAME_SZ, %o0 | |
776 | ||
777 | RESTORE_ALL | |
778 | ||
779 | .align 4 | |
780 | .globl invalid_segment_patch1_ff | |
781 | .globl invalid_segment_patch2_ff | |
782 | invalid_segment_patch1_ff: cmp %l4, 0xff | |
783 | invalid_segment_patch2_ff: mov 0xff, %l3 | |
784 | ||
785 | .align 4 | |
786 | .globl invalid_segment_patch1_1ff | |
787 | .globl invalid_segment_patch2_1ff | |
788 | invalid_segment_patch1_1ff: cmp %l4, 0x1ff | |
789 | invalid_segment_patch2_1ff: mov 0x1ff, %l3 | |
790 | ||
791 | .align 4 | |
792 | .globl num_context_patch1_16, num_context_patch2_16 | |
793 | num_context_patch1_16: mov 0x10, %l7 | |
794 | num_context_patch2_16: mov 0x10, %l7 | |
795 | ||
796 | .align 4 | |
797 | .globl vac_linesize_patch_32 | |
798 | vac_linesize_patch_32: subcc %l7, 32, %l7 | |
799 | ||
800 | .align 4 | |
801 | .globl vac_hwflush_patch1_on, vac_hwflush_patch2_on | |
802 | ||
803 | /* | |
25985edc | 804 | * Ugly, but we can't use hardware flushing on the sun4 and we'd require |
1da177e4 LT |
805 | * two instructions (Anton) |
806 | */ | |
1da177e4 | 807 | vac_hwflush_patch1_on: addcc %l7, -PAGE_SIZE, %l7 |
1da177e4 LT |
808 | |
809 | vac_hwflush_patch2_on: sta %g0, [%l3 + %l7] ASI_HWFLUSHSEG | |
810 | ||
811 | .globl invalid_segment_patch1, invalid_segment_patch2 | |
812 | .globl num_context_patch1 | |
813 | .globl vac_linesize_patch, vac_hwflush_patch1 | |
814 | .globl vac_hwflush_patch2 | |
815 | ||
816 | .align 4 | |
817 | .globl sun4c_fault | |
818 | ||
819 | ! %l0 = %psr | |
820 | ! %l1 = %pc | |
821 | ! %l2 = %npc | |
822 | ! %l3 = %wim | |
823 | ! %l7 = 1 for textfault | |
824 | ! We want error in %l5, vaddr in %l6 | |
825 | sun4c_fault: | |
1da177e4 LT |
826 | sethi %hi(AC_SYNC_ERR), %l4 |
827 | add %l4, 0x4, %l6 ! AC_SYNC_VA in %l6 | |
828 | lda [%l6] ASI_CONTROL, %l5 ! Address | |
829 | lda [%l4] ASI_CONTROL, %l6 ! Error, retained for a bit | |
1da177e4 LT |
830 | |
831 | andn %l5, 0xfff, %l5 ! Encode all info into l7 | |
832 | srl %l6, 14, %l4 | |
833 | ||
834 | and %l4, 2, %l4 | |
835 | or %l5, %l4, %l4 | |
836 | ||
837 | or %l4, %l7, %l7 ! l7 = [addr,write,txtfault] | |
838 | ||
839 | andcc %l0, PSR_PS, %g0 | |
840 | be sun4c_fault_fromuser | |
841 | andcc %l7, 1, %g0 ! Text fault? | |
842 | ||
843 | be 1f | |
844 | sethi %hi(KERNBASE), %l4 | |
845 | ||
846 | mov %l1, %l5 ! PC | |
847 | ||
848 | 1: | |
849 | cmp %l5, %l4 | |
850 | blu sun4c_fault_fromuser | |
851 | sethi %hi(~((1 << SUN4C_REAL_PGDIR_SHIFT) - 1)), %l4 | |
852 | ||
853 | /* If the kernel references a bum kernel pointer, or a pte which | |
25985edc | 854 | * points to a non existent page in ram, we will run this code |
1da177e4 LT |
855 | * _forever_ and lock up the machine!!!!! So we must check for |
856 | * this condition, the AC_SYNC_ERR bits are what we must examine. | |
857 | * Also a parity error would make this happen as well. So we just | |
858 | * check that we are in fact servicing a tlb miss and not some | |
859 | * other type of fault for the kernel. | |
860 | */ | |
861 | andcc %l6, 0x80, %g0 | |
862 | be sun4c_fault_fromuser | |
863 | and %l5, %l4, %l5 | |
864 | ||
865 | /* Test for NULL pte_t * in vmalloc area. */ | |
866 | sethi %hi(VMALLOC_START), %l4 | |
867 | cmp %l5, %l4 | |
868 | blu,a invalid_segment_patch1 | |
869 | lduXa [%l5] ASI_SEGMAP, %l4 | |
870 | ||
871 | sethi %hi(swapper_pg_dir), %l4 | |
872 | srl %l5, SUN4C_PGDIR_SHIFT, %l6 | |
873 | or %l4, %lo(swapper_pg_dir), %l4 | |
874 | sll %l6, 2, %l6 | |
875 | ld [%l4 + %l6], %l4 | |
1da177e4 | 876 | andcc %l4, PAGE_MASK, %g0 |
1da177e4 LT |
877 | be sun4c_fault_fromuser |
878 | lduXa [%l5] ASI_SEGMAP, %l4 | |
879 | ||
880 | invalid_segment_patch1: | |
881 | cmp %l4, 0x7f | |
882 | bne 1f | |
883 | sethi %hi(sun4c_kfree_ring), %l4 | |
884 | or %l4, %lo(sun4c_kfree_ring), %l4 | |
885 | ld [%l4 + 0x18], %l3 | |
886 | deccc %l3 ! do we have a free entry? | |
887 | bcs,a 2f ! no, unmap one. | |
888 | sethi %hi(sun4c_kernel_ring), %l4 | |
889 | ||
890 | st %l3, [%l4 + 0x18] ! sun4c_kfree_ring.num_entries-- | |
891 | ||
892 | ld [%l4 + 0x00], %l6 ! entry = sun4c_kfree_ring.ringhd.next | |
893 | st %l5, [%l6 + 0x08] ! entry->vaddr = address | |
894 | ||
895 | ld [%l6 + 0x00], %l3 ! next = entry->next | |
896 | ld [%l6 + 0x04], %l7 ! entry->prev | |
897 | ||
898 | st %l7, [%l3 + 0x04] ! next->prev = entry->prev | |
899 | st %l3, [%l7 + 0x00] ! entry->prev->next = next | |
900 | ||
901 | sethi %hi(sun4c_kernel_ring), %l4 | |
902 | or %l4, %lo(sun4c_kernel_ring), %l4 | |
903 | ! head = &sun4c_kernel_ring.ringhd | |
904 | ||
905 | ld [%l4 + 0x00], %l7 ! head->next | |
906 | ||
907 | st %l4, [%l6 + 0x04] ! entry->prev = head | |
908 | st %l7, [%l6 + 0x00] ! entry->next = head->next | |
909 | st %l6, [%l7 + 0x04] ! head->next->prev = entry | |
910 | ||
911 | st %l6, [%l4 + 0x00] ! head->next = entry | |
912 | ||
913 | ld [%l4 + 0x18], %l3 | |
914 | inc %l3 ! sun4c_kernel_ring.num_entries++ | |
915 | st %l3, [%l4 + 0x18] | |
916 | b 4f | |
917 | ld [%l6 + 0x08], %l5 | |
918 | ||
919 | 2: | |
920 | or %l4, %lo(sun4c_kernel_ring), %l4 | |
921 | ! head = &sun4c_kernel_ring.ringhd | |
922 | ||
923 | ld [%l4 + 0x04], %l6 ! entry = head->prev | |
924 | ||
925 | ld [%l6 + 0x08], %l3 ! tmp = entry->vaddr | |
926 | ||
927 | ! Flush segment from the cache. | |
1da177e4 | 928 | sethi %hi((64 * 1024)), %l7 |
1da177e4 LT |
929 | 9: |
930 | vac_hwflush_patch1: | |
931 | vac_linesize_patch: | |
932 | subcc %l7, 16, %l7 | |
933 | bne 9b | |
934 | vac_hwflush_patch2: | |
935 | sta %g0, [%l3 + %l7] ASI_FLUSHSEG | |
936 | ||
937 | st %l5, [%l6 + 0x08] ! entry->vaddr = address | |
938 | ||
939 | ld [%l6 + 0x00], %l5 ! next = entry->next | |
940 | ld [%l6 + 0x04], %l7 ! entry->prev | |
941 | ||
942 | st %l7, [%l5 + 0x04] ! next->prev = entry->prev | |
943 | st %l5, [%l7 + 0x00] ! entry->prev->next = next | |
944 | st %l4, [%l6 + 0x04] ! entry->prev = head | |
945 | ||
946 | ld [%l4 + 0x00], %l7 ! head->next | |
947 | ||
948 | st %l7, [%l6 + 0x00] ! entry->next = head->next | |
949 | st %l6, [%l7 + 0x04] ! head->next->prev = entry | |
950 | st %l6, [%l4 + 0x00] ! head->next = entry | |
951 | ||
952 | mov %l3, %l5 ! address = tmp | |
953 | ||
954 | 4: | |
955 | num_context_patch1: | |
956 | mov 0x08, %l7 | |
957 | ||
958 | ld [%l6 + 0x08], %l4 | |
959 | ldub [%l6 + 0x0c], %l3 | |
960 | or %l4, %l3, %l4 ! encode new vaddr/pseg into l4 | |
961 | ||
962 | sethi %hi(AC_CONTEXT), %l3 | |
963 | lduba [%l3] ASI_CONTROL, %l6 | |
964 | ||
965 | /* Invalidate old mapping, instantiate new mapping, | |
966 | * for each context. Registers l6/l7 are live across | |
967 | * this loop. | |
968 | */ | |
969 | 3: deccc %l7 | |
970 | sethi %hi(AC_CONTEXT), %l3 | |
971 | stba %l7, [%l3] ASI_CONTROL | |
972 | invalid_segment_patch2: | |
973 | mov 0x7f, %l3 | |
974 | stXa %l3, [%l5] ASI_SEGMAP | |
975 | andn %l4, 0x1ff, %l3 | |
976 | bne 3b | |
977 | stXa %l4, [%l3] ASI_SEGMAP | |
978 | ||
979 | sethi %hi(AC_CONTEXT), %l3 | |
980 | stba %l6, [%l3] ASI_CONTROL | |
981 | ||
982 | andn %l4, 0x1ff, %l5 | |
983 | ||
984 | 1: | |
985 | sethi %hi(VMALLOC_START), %l4 | |
986 | cmp %l5, %l4 | |
987 | ||
988 | bgeu 1f | |
989 | mov 1 << (SUN4C_REAL_PGDIR_SHIFT - PAGE_SHIFT), %l7 | |
990 | ||
991 | sethi %hi(KERNBASE), %l6 | |
992 | ||
993 | sub %l5, %l6, %l4 | |
994 | srl %l4, PAGE_SHIFT, %l4 | |
995 | sethi %hi((SUN4C_PAGE_KERNEL & 0xf4000000)), %l3 | |
996 | or %l3, %l4, %l3 | |
997 | ||
998 | sethi %hi(PAGE_SIZE), %l4 | |
999 | ||
1000 | 2: | |
1001 | sta %l3, [%l5] ASI_PTE | |
1002 | deccc %l7 | |
1003 | inc %l3 | |
1004 | bne 2b | |
1005 | add %l5, %l4, %l5 | |
1006 | ||
1007 | b 7f | |
1008 | sethi %hi(sun4c_kernel_faults), %l4 | |
1009 | ||
1010 | 1: | |
1011 | srl %l5, SUN4C_PGDIR_SHIFT, %l3 | |
1012 | sethi %hi(swapper_pg_dir), %l4 | |
1013 | or %l4, %lo(swapper_pg_dir), %l4 | |
1014 | sll %l3, 2, %l3 | |
1015 | ld [%l4 + %l3], %l4 | |
1da177e4 | 1016 | and %l4, PAGE_MASK, %l4 |
1da177e4 LT |
1017 | |
1018 | srl %l5, (PAGE_SHIFT - 2), %l6 | |
1019 | and %l6, ((SUN4C_PTRS_PER_PTE - 1) << 2), %l6 | |
1020 | add %l6, %l4, %l6 | |
1021 | ||
1022 | sethi %hi(PAGE_SIZE), %l4 | |
1023 | ||
1024 | 2: | |
1025 | ld [%l6], %l3 | |
1026 | deccc %l7 | |
1027 | sta %l3, [%l5] ASI_PTE | |
1028 | add %l6, 0x4, %l6 | |
1029 | bne 2b | |
1030 | add %l5, %l4, %l5 | |
1031 | ||
1032 | sethi %hi(sun4c_kernel_faults), %l4 | |
1033 | 7: | |
1034 | ld [%l4 + %lo(sun4c_kernel_faults)], %l3 | |
1035 | inc %l3 | |
1036 | st %l3, [%l4 + %lo(sun4c_kernel_faults)] | |
1037 | ||
1038 | /* Restore condition codes */ | |
1039 | wr %l0, 0x0, %psr | |
1040 | WRITE_PAUSE | |
1041 | jmp %l1 | |
1042 | rett %l2 | |
1043 | ||
1044 | sun4c_fault_fromuser: | |
1045 | SAVE_ALL | |
1046 | nop | |
1047 | ||
1048 | mov %l7, %o1 ! Decode the info from %l7 | |
1049 | mov %l7, %o2 | |
1050 | and %o1, 1, %o1 ! arg2 = text_faultp | |
1051 | mov %l7, %o3 | |
1052 | and %o2, 2, %o2 ! arg3 = writep | |
1053 | andn %o3, 0xfff, %o3 ! arg4 = faulting address | |
1054 | ||
1055 | wr %l0, PSR_ET, %psr | |
1056 | WRITE_PAUSE | |
1057 | ||
1058 | call do_sun4c_fault | |
1059 | add %sp, STACKFRAME_SZ, %o0 ! arg1 = pt_regs ptr | |
1060 | ||
1061 | RESTORE_ALL | |
1062 | ||
1063 | .align 4 | |
1064 | .globl srmmu_fault | |
1065 | srmmu_fault: | |
1066 | mov 0x400, %l5 | |
1067 | mov 0x300, %l4 | |
1068 | ||
1069 | lda [%l5] ASI_M_MMUREGS, %l6 ! read sfar first | |
1070 | lda [%l4] ASI_M_MMUREGS, %l5 ! read sfsr last | |
1071 | ||
1072 | andn %l6, 0xfff, %l6 | |
1073 | srl %l5, 6, %l5 ! and encode all info into l7 | |
1074 | ||
1075 | and %l5, 2, %l5 | |
1076 | or %l5, %l6, %l6 | |
1077 | ||
1078 | or %l6, %l7, %l7 ! l7 = [addr,write,txtfault] | |
1079 | ||
1080 | SAVE_ALL | |
1081 | ||
1082 | mov %l7, %o1 | |
1083 | mov %l7, %o2 | |
1084 | and %o1, 1, %o1 ! arg2 = text_faultp | |
1085 | mov %l7, %o3 | |
1086 | and %o2, 2, %o2 ! arg3 = writep | |
1087 | andn %o3, 0xfff, %o3 ! arg4 = faulting address | |
1088 | ||
1089 | wr %l0, PSR_ET, %psr | |
1090 | WRITE_PAUSE | |
1091 | ||
1092 | call do_sparc_fault | |
1093 | add %sp, STACKFRAME_SZ, %o0 ! arg1 = pt_regs ptr | |
1094 | ||
1095 | RESTORE_ALL | |
1096 | ||
1da177e4 LT |
1097 | .align 4 |
1098 | .globl sys_nis_syscall | |
1099 | sys_nis_syscall: | |
1100 | mov %o7, %l5 | |
1101 | add %sp, STACKFRAME_SZ, %o0 ! pt_regs *regs arg | |
1102 | call c_sys_nis_syscall | |
1103 | mov %l5, %o7 | |
1104 | ||
1da177e4 LT |
1105 | .align 4 |
1106 | .globl sys_execve | |
1107 | sys_execve: | |
1108 | mov %o7, %l5 | |
1109 | add %sp, STACKFRAME_SZ, %o0 ! pt_regs *regs arg | |
1110 | call sparc_execve | |
1111 | mov %l5, %o7 | |
1112 | ||
ec98c6b9 DM |
1113 | .globl sunos_execv |
1114 | sunos_execv: | |
1115 | st %g0, [%sp + STACKFRAME_SZ + PT_I2] | |
1116 | ||
1117 | call sparc_execve | |
1118 | add %sp, STACKFRAME_SZ, %o0 | |
1119 | ||
1120 | b ret_sys_call | |
1121 | ld [%sp + STACKFRAME_SZ + PT_I0], %o0 | |
1122 | ||
1da177e4 | 1123 | .align 4 |
1134723e HC |
1124 | .globl sys_sparc_pipe |
1125 | sys_sparc_pipe: | |
1da177e4 LT |
1126 | mov %o7, %l5 |
1127 | add %sp, STACKFRAME_SZ, %o0 ! pt_regs *regs arg | |
1128 | call sparc_pipe | |
1129 | mov %l5, %o7 | |
1130 | ||
1131 | .align 4 | |
1132 | .globl sys_sigaltstack | |
1133 | sys_sigaltstack: | |
1134 | mov %o7, %l5 | |
1135 | mov %fp, %o2 | |
1136 | call do_sigaltstack | |
1137 | mov %l5, %o7 | |
1138 | ||
1139 | .align 4 | |
1140 | .globl sys_sigstack | |
1141 | sys_sigstack: | |
1142 | mov %o7, %l5 | |
1143 | mov %fp, %o2 | |
1144 | call do_sys_sigstack | |
1145 | mov %l5, %o7 | |
1146 | ||
1da177e4 LT |
1147 | .align 4 |
1148 | .globl sys_sigreturn | |
1149 | sys_sigreturn: | |
1150 | call do_sigreturn | |
1151 | add %sp, STACKFRAME_SZ, %o0 | |
1152 | ||
1153 | ld [%curptr + TI_FLAGS], %l5 | |
1154 | andcc %l5, _TIF_SYSCALL_TRACE, %g0 | |
1155 | be 1f | |
1156 | nop | |
1157 | ||
1158 | call syscall_trace | |
1159 | nop | |
1160 | ||
1161 | 1: | |
1162 | /* We don't want to muck with user registers like a | |
1163 | * normal syscall, just return. | |
1164 | */ | |
1165 | RESTORE_ALL | |
1166 | ||
1167 | .align 4 | |
1168 | .globl sys_rt_sigreturn | |
1169 | sys_rt_sigreturn: | |
1170 | call do_rt_sigreturn | |
1171 | add %sp, STACKFRAME_SZ, %o0 | |
1172 | ||
1173 | ld [%curptr + TI_FLAGS], %l5 | |
1174 | andcc %l5, _TIF_SYSCALL_TRACE, %g0 | |
1175 | be 1f | |
1176 | nop | |
1177 | ||
1c133b4b | 1178 | add %sp, STACKFRAME_SZ, %o0 |
1da177e4 | 1179 | call syscall_trace |
1c133b4b | 1180 | mov 1, %o1 |
1da177e4 LT |
1181 | |
1182 | 1: | |
1183 | /* We are returning to a signal handler. */ | |
1184 | RESTORE_ALL | |
1185 | ||
1186 | /* Now that we have a real sys_clone, sys_fork() is | |
1187 | * implemented in terms of it. Our _real_ implementation | |
1188 | * of SunOS vfork() will use sys_vfork(). | |
1189 | * | |
1190 | * XXX These three should be consolidated into mostly shared | |
1191 | * XXX code just like on sparc64... -DaveM | |
1192 | */ | |
1193 | .align 4 | |
1194 | .globl sys_fork, flush_patch_two | |
1195 | sys_fork: | |
1196 | mov %o7, %l5 | |
1197 | flush_patch_two: | |
1198 | FLUSH_ALL_KERNEL_WINDOWS; | |
1199 | ld [%curptr + TI_TASK], %o4 | |
1200 | rd %psr, %g4 | |
1201 | WRITE_PAUSE | |
1202 | mov SIGCHLD, %o0 ! arg0: clone flags | |
1203 | rd %wim, %g5 | |
1204 | WRITE_PAUSE | |
1205 | mov %fp, %o1 ! arg1: usp | |
1206 | std %g4, [%o4 + AOFF_task_thread + AOFF_thread_fork_kpsr] | |
1207 | add %sp, STACKFRAME_SZ, %o2 ! arg2: pt_regs ptr | |
1208 | mov 0, %o3 | |
1209 | call sparc_do_fork | |
1210 | mov %l5, %o7 | |
1211 | ||
1212 | /* Whee, kernel threads! */ | |
1213 | .globl sys_clone, flush_patch_three | |
1214 | sys_clone: | |
1215 | mov %o7, %l5 | |
1216 | flush_patch_three: | |
1217 | FLUSH_ALL_KERNEL_WINDOWS; | |
1218 | ld [%curptr + TI_TASK], %o4 | |
1219 | rd %psr, %g4 | |
1220 | WRITE_PAUSE | |
1221 | ||
1222 | /* arg0,1: flags,usp -- loaded already */ | |
1223 | cmp %o1, 0x0 ! Is new_usp NULL? | |
1224 | rd %wim, %g5 | |
1225 | WRITE_PAUSE | |
1226 | be,a 1f | |
1227 | mov %fp, %o1 ! yes, use callers usp | |
1228 | andn %o1, 7, %o1 ! no, align to 8 bytes | |
1229 | 1: | |
1230 | std %g4, [%o4 + AOFF_task_thread + AOFF_thread_fork_kpsr] | |
1231 | add %sp, STACKFRAME_SZ, %o2 ! arg2: pt_regs ptr | |
1232 | mov 0, %o3 | |
1233 | call sparc_do_fork | |
1234 | mov %l5, %o7 | |
1235 | ||
1236 | /* Whee, real vfork! */ | |
1237 | .globl sys_vfork, flush_patch_four | |
1238 | sys_vfork: | |
1239 | flush_patch_four: | |
1240 | FLUSH_ALL_KERNEL_WINDOWS; | |
1241 | ld [%curptr + TI_TASK], %o4 | |
1242 | rd %psr, %g4 | |
1243 | WRITE_PAUSE | |
1244 | rd %wim, %g5 | |
1245 | WRITE_PAUSE | |
1246 | std %g4, [%o4 + AOFF_task_thread + AOFF_thread_fork_kpsr] | |
1247 | sethi %hi(0x4000 | 0x0100 | SIGCHLD), %o0 | |
1248 | mov %fp, %o1 | |
1249 | or %o0, %lo(0x4000 | 0x0100 | SIGCHLD), %o0 | |
1250 | sethi %hi(sparc_do_fork), %l1 | |
1251 | mov 0, %o3 | |
1252 | jmpl %l1 + %lo(sparc_do_fork), %g0 | |
1253 | add %sp, STACKFRAME_SZ, %o2 | |
1254 | ||
1255 | .align 4 | |
1256 | linux_sparc_ni_syscall: | |
1257 | sethi %hi(sys_ni_syscall), %l7 | |
1258 | b syscall_is_too_hard | |
1259 | or %l7, %lo(sys_ni_syscall), %l7 | |
1260 | ||
1261 | linux_fast_syscall: | |
1262 | andn %l7, 3, %l7 | |
1263 | mov %i0, %o0 | |
1264 | mov %i1, %o1 | |
1265 | mov %i2, %o2 | |
1266 | jmpl %l7 + %g0, %g0 | |
1267 | mov %i3, %o3 | |
1268 | ||
1269 | linux_syscall_trace: | |
1c133b4b | 1270 | add %sp, STACKFRAME_SZ, %o0 |
1da177e4 | 1271 | call syscall_trace |
1c133b4b DM |
1272 | mov 0, %o1 |
1273 | cmp %o0, 0 | |
1274 | bne 3f | |
1275 | mov -ENOSYS, %o0 | |
1da177e4 LT |
1276 | mov %i0, %o0 |
1277 | mov %i1, %o1 | |
1278 | mov %i2, %o2 | |
1279 | mov %i3, %o3 | |
1280 | b 2f | |
1281 | mov %i4, %o4 | |
1282 | ||
1283 | .globl ret_from_fork | |
1284 | ret_from_fork: | |
1285 | call schedule_tail | |
1286 | mov %g3, %o0 | |
1287 | b ret_sys_call | |
1288 | ld [%sp + STACKFRAME_SZ + PT_I0], %o0 | |
1289 | ||
ec98c6b9 | 1290 | /* Linux native system calls enter here... */ |
1da177e4 LT |
1291 | .align 4 |
1292 | .globl linux_sparc_syscall | |
1293 | linux_sparc_syscall: | |
28e61036 DM |
1294 | sethi %hi(PSR_SYSCALL), %l4 |
1295 | or %l0, %l4, %l0 | |
1da177e4 | 1296 | /* Direct access to user regs, must faster. */ |
c658ad1b | 1297 | cmp %g1, NR_syscalls |
1da177e4 LT |
1298 | bgeu linux_sparc_ni_syscall |
1299 | sll %g1, 2, %l4 | |
1300 | ld [%l7 + %l4], %l7 | |
1301 | andcc %l7, 1, %g0 | |
1302 | bne linux_fast_syscall | |
1303 | /* Just do first insn from SAVE_ALL in the delay slot */ | |
1304 | ||
1da177e4 LT |
1305 | syscall_is_too_hard: |
1306 | SAVE_ALL_HEAD | |
1307 | rd %wim, %l3 | |
1308 | ||
1309 | wr %l0, PSR_ET, %psr | |
1310 | mov %i0, %o0 | |
1311 | mov %i1, %o1 | |
1312 | mov %i2, %o2 | |
1313 | ||
1314 | ld [%curptr + TI_FLAGS], %l5 | |
1315 | mov %i3, %o3 | |
1316 | andcc %l5, _TIF_SYSCALL_TRACE, %g0 | |
1317 | mov %i4, %o4 | |
1318 | bne linux_syscall_trace | |
1319 | mov %i0, %l5 | |
1320 | 2: | |
1321 | call %l7 | |
1322 | mov %i5, %o5 | |
1323 | ||
1c133b4b | 1324 | 3: |
1da177e4 LT |
1325 | st %o0, [%sp + STACKFRAME_SZ + PT_I0] |
1326 | ||
1da177e4 LT |
1327 | ret_sys_call: |
1328 | ld [%curptr + TI_FLAGS], %l6 | |
1329 | cmp %o0, -ERESTART_RESTARTBLOCK | |
1330 | ld [%sp + STACKFRAME_SZ + PT_PSR], %g3 | |
1331 | set PSR_C, %g2 | |
1332 | bgeu 1f | |
1333 | andcc %l6, _TIF_SYSCALL_TRACE, %g0 | |
1334 | ||
1335 | /* System call success, clear Carry condition code. */ | |
1336 | andn %g3, %g2, %g3 | |
1337 | clr %l6 | |
1338 | st %g3, [%sp + STACKFRAME_SZ + PT_PSR] | |
1339 | bne linux_syscall_trace2 | |
1340 | ld [%sp + STACKFRAME_SZ + PT_NPC], %l1 /* pc = npc */ | |
1341 | add %l1, 0x4, %l2 /* npc = npc+4 */ | |
1342 | st %l1, [%sp + STACKFRAME_SZ + PT_PC] | |
1343 | b ret_trap_entry | |
1344 | st %l2, [%sp + STACKFRAME_SZ + PT_NPC] | |
1345 | 1: | |
1346 | /* System call failure, set Carry condition code. | |
1347 | * Also, get abs(errno) to return to the process. | |
1348 | */ | |
1349 | sub %g0, %o0, %o0 | |
1350 | or %g3, %g2, %g3 | |
1351 | st %o0, [%sp + STACKFRAME_SZ + PT_I0] | |
1352 | mov 1, %l6 | |
1353 | st %g3, [%sp + STACKFRAME_SZ + PT_PSR] | |
1354 | bne linux_syscall_trace2 | |
1355 | ld [%sp + STACKFRAME_SZ + PT_NPC], %l1 /* pc = npc */ | |
1356 | add %l1, 0x4, %l2 /* npc = npc+4 */ | |
1357 | st %l1, [%sp + STACKFRAME_SZ + PT_PC] | |
1358 | b ret_trap_entry | |
1359 | st %l2, [%sp + STACKFRAME_SZ + PT_NPC] | |
1360 | ||
1361 | linux_syscall_trace2: | |
1c133b4b DM |
1362 | add %sp, STACKFRAME_SZ, %o0 |
1363 | mov 1, %o1 | |
1da177e4 LT |
1364 | call syscall_trace |
1365 | add %l1, 0x4, %l2 /* npc = npc+4 */ | |
1366 | st %l1, [%sp + STACKFRAME_SZ + PT_PC] | |
1367 | b ret_trap_entry | |
1368 | st %l2, [%sp + STACKFRAME_SZ + PT_NPC] | |
1369 | ||
1370 | ||
1da177e4 LT |
1371 | /* Saving and restoring the FPU state is best done from lowlevel code. |
1372 | * | |
1373 | * void fpsave(unsigned long *fpregs, unsigned long *fsr, | |
1374 | * void *fpqueue, unsigned long *fpqdepth) | |
1375 | */ | |
1376 | ||
1377 | .globl fpsave | |
1378 | fpsave: | |
1379 | st %fsr, [%o1] ! this can trap on us if fpu is in bogon state | |
1380 | ld [%o1], %g1 | |
1381 | set 0x2000, %g4 | |
1382 | andcc %g1, %g4, %g0 | |
1383 | be 2f | |
1384 | mov 0, %g2 | |
1385 | ||
1386 | /* We have an fpqueue to save. */ | |
1387 | 1: | |
1388 | std %fq, [%o2] | |
1389 | fpsave_magic: | |
1390 | st %fsr, [%o1] | |
1391 | ld [%o1], %g3 | |
1392 | andcc %g3, %g4, %g0 | |
1393 | add %g2, 1, %g2 | |
1394 | bne 1b | |
1395 | add %o2, 8, %o2 | |
1396 | ||
1397 | 2: | |
1398 | st %g2, [%o3] | |
1399 | ||
1400 | std %f0, [%o0 + 0x00] | |
1401 | std %f2, [%o0 + 0x08] | |
1402 | std %f4, [%o0 + 0x10] | |
1403 | std %f6, [%o0 + 0x18] | |
1404 | std %f8, [%o0 + 0x20] | |
1405 | std %f10, [%o0 + 0x28] | |
1406 | std %f12, [%o0 + 0x30] | |
1407 | std %f14, [%o0 + 0x38] | |
1408 | std %f16, [%o0 + 0x40] | |
1409 | std %f18, [%o0 + 0x48] | |
1410 | std %f20, [%o0 + 0x50] | |
1411 | std %f22, [%o0 + 0x58] | |
1412 | std %f24, [%o0 + 0x60] | |
1413 | std %f26, [%o0 + 0x68] | |
1414 | std %f28, [%o0 + 0x70] | |
1415 | retl | |
1416 | std %f30, [%o0 + 0x78] | |
1417 | ||
1418 | /* Thanks for Theo Deraadt and the authors of the Sprite/netbsd/openbsd | |
1419 | * code for pointing out this possible deadlock, while we save state | |
1420 | * above we could trap on the fsr store so our low level fpu trap | |
1421 | * code has to know how to deal with this. | |
1422 | */ | |
1423 | fpsave_catch: | |
1424 | b fpsave_magic + 4 | |
1425 | st %fsr, [%o1] | |
1426 | ||
1427 | fpsave_catch2: | |
1428 | b fpsave + 4 | |
1429 | st %fsr, [%o1] | |
1430 | ||
1431 | /* void fpload(unsigned long *fpregs, unsigned long *fsr); */ | |
1432 | ||
1433 | .globl fpload | |
1434 | fpload: | |
1435 | ldd [%o0 + 0x00], %f0 | |
1436 | ldd [%o0 + 0x08], %f2 | |
1437 | ldd [%o0 + 0x10], %f4 | |
1438 | ldd [%o0 + 0x18], %f6 | |
1439 | ldd [%o0 + 0x20], %f8 | |
1440 | ldd [%o0 + 0x28], %f10 | |
1441 | ldd [%o0 + 0x30], %f12 | |
1442 | ldd [%o0 + 0x38], %f14 | |
1443 | ldd [%o0 + 0x40], %f16 | |
1444 | ldd [%o0 + 0x48], %f18 | |
1445 | ldd [%o0 + 0x50], %f20 | |
1446 | ldd [%o0 + 0x58], %f22 | |
1447 | ldd [%o0 + 0x60], %f24 | |
1448 | ldd [%o0 + 0x68], %f26 | |
1449 | ldd [%o0 + 0x70], %f28 | |
1450 | ldd [%o0 + 0x78], %f30 | |
1451 | ld [%o1], %fsr | |
1452 | retl | |
1453 | nop | |
1454 | ||
1455 | /* __ndelay and __udelay take two arguments: | |
1456 | * 0 - nsecs or usecs to delay | |
1457 | * 1 - per_cpu udelay_val (loops per jiffy) | |
1458 | * | |
1459 | * Note that ndelay gives HZ times higher resolution but has a 10ms | |
1460 | * limit. udelay can handle up to 1s. | |
1461 | */ | |
1462 | .globl __ndelay | |
1463 | __ndelay: | |
1464 | save %sp, -STACKFRAME_SZ, %sp | |
1465 | mov %i0, %o0 | |
196bffa5 MF |
1466 | call .umul ! round multiplier up so large ns ok |
1467 | mov 0x1ae, %o1 ! 2**32 / (1 000 000 000 / HZ) | |
1da177e4 LT |
1468 | call .umul |
1469 | mov %i1, %o1 ! udelay_val | |
1470 | ba delay_continue | |
1471 | mov %o1, %o0 ! >>32 later for better resolution | |
1472 | ||
1473 | .globl __udelay | |
1474 | __udelay: | |
1475 | save %sp, -STACKFRAME_SZ, %sp | |
1476 | mov %i0, %o0 | |
196bffa5 | 1477 | sethi %hi(0x10c7), %o1 ! round multiplier up so large us ok |
1da177e4 | 1478 | call .umul |
196bffa5 | 1479 | or %o1, %lo(0x10c7), %o1 ! 2**32 / 1 000 000 |
1da177e4 LT |
1480 | call .umul |
1481 | mov %i1, %o1 ! udelay_val | |
196bffa5 MF |
1482 | sethi %hi(0x028f4b62), %l0 ! Add in rounding constant * 2**32, |
1483 | or %g0, %lo(0x028f4b62), %l0 | |
1484 | addcc %o0, %l0, %o0 ! 2**32 * 0.009 999 | |
1485 | bcs,a 3f | |
1486 | add %o1, 0x01, %o1 | |
1487 | 3: | |
1da177e4 LT |
1488 | call .umul |
1489 | mov HZ, %o0 ! >>32 earlier for wider range | |
1490 | ||
1491 | delay_continue: | |
1492 | cmp %o0, 0x0 | |
1493 | 1: | |
1494 | bne 1b | |
1495 | subcc %o0, 1, %o0 | |
1496 | ||
1497 | ret | |
1498 | restore | |
1499 | ||
1500 | /* Handle a software breakpoint */ | |
1501 | /* We have to inform parent that child has stopped */ | |
1502 | .align 4 | |
1503 | .globl breakpoint_trap | |
1504 | breakpoint_trap: | |
1505 | rd %wim,%l3 | |
1506 | SAVE_ALL | |
1507 | wr %l0, PSR_ET, %psr | |
1508 | WRITE_PAUSE | |
1509 | ||
1510 | st %i0, [%sp + STACKFRAME_SZ + PT_G0] ! for restarting syscalls | |
1511 | call sparc_breakpoint | |
1512 | add %sp, STACKFRAME_SZ, %o0 | |
1513 | ||
1514 | RESTORE_ALL | |
1515 | ||
e2fdd7fd DM |
1516 | #ifdef CONFIG_KGDB |
1517 | .align 4 | |
1518 | .globl kgdb_trap_low | |
1519 | .type kgdb_trap_low,#function | |
1520 | kgdb_trap_low: | |
1521 | rd %wim,%l3 | |
1522 | SAVE_ALL | |
1523 | wr %l0, PSR_ET, %psr | |
1524 | WRITE_PAUSE | |
1525 | ||
1526 | call kgdb_trap | |
1527 | add %sp, STACKFRAME_SZ, %o0 | |
1528 | ||
1529 | RESTORE_ALL | |
1530 | .size kgdb_trap_low,.-kgdb_trap_low | |
1531 | #endif | |
1532 | ||
1da177e4 | 1533 | .align 4 |
c61c65cd | 1534 | .globl flush_patch_exception |
1da177e4 LT |
1535 | flush_patch_exception: |
1536 | FLUSH_ALL_KERNEL_WINDOWS; | |
1537 | ldd [%o0], %o6 | |
1538 | jmpl %o7 + 0xc, %g0 ! see asm-sparc/processor.h | |
1539 | mov 1, %g1 ! signal EFAULT condition | |
1540 | ||
1541 | .align 4 | |
1542 | .globl kill_user_windows, kuw_patch1_7win | |
1543 | .globl kuw_patch1 | |
1544 | kuw_patch1_7win: sll %o3, 6, %o3 | |
1545 | ||
1546 | /* No matter how much overhead this routine has in the worst | |
1547 | * case scenerio, it is several times better than taking the | |
1548 | * traps with the old method of just doing flush_user_windows(). | |
1549 | */ | |
1550 | kill_user_windows: | |
1551 | ld [%g6 + TI_UWINMASK], %o0 ! get current umask | |
1552 | orcc %g0, %o0, %g0 ! if no bits set, we are done | |
1553 | be 3f ! nothing to do | |
1554 | rd %psr, %o5 ! must clear interrupts | |
1555 | or %o5, PSR_PIL, %o4 ! or else that could change | |
1556 | wr %o4, 0x0, %psr ! the uwinmask state | |
1557 | WRITE_PAUSE ! burn them cycles | |
1558 | 1: | |
1559 | ld [%g6 + TI_UWINMASK], %o0 ! get consistent state | |
1560 | orcc %g0, %o0, %g0 ! did an interrupt come in? | |
1561 | be 4f ! yep, we are done | |
1562 | rd %wim, %o3 ! get current wim | |
1563 | srl %o3, 1, %o4 ! simulate a save | |
1564 | kuw_patch1: | |
1565 | sll %o3, 7, %o3 ! compute next wim | |
1566 | or %o4, %o3, %o3 ! result | |
1567 | andncc %o0, %o3, %o0 ! clean this bit in umask | |
1568 | bne kuw_patch1 ! not done yet | |
1569 | srl %o3, 1, %o4 ! begin another save simulation | |
1570 | wr %o3, 0x0, %wim ! set the new wim | |
1571 | st %g0, [%g6 + TI_UWINMASK] ! clear uwinmask | |
1572 | 4: | |
1573 | wr %o5, 0x0, %psr ! re-enable interrupts | |
1574 | WRITE_PAUSE ! burn baby burn | |
1575 | 3: | |
1576 | retl ! return | |
1577 | st %g0, [%g6 + TI_W_SAVED] ! no windows saved | |
1578 | ||
1579 | .align 4 | |
1580 | .globl restore_current | |
1581 | restore_current: | |
1582 | LOAD_CURRENT(g6, o0) | |
1583 | retl | |
1584 | nop | |
1585 | ||
1586 | #ifdef CONFIG_PCI | |
1587 | #include <asm/pcic.h> | |
1588 | ||
1589 | .align 4 | |
1590 | .globl linux_trap_ipi15_pcic | |
1591 | linux_trap_ipi15_pcic: | |
1592 | rd %wim, %l3 | |
1593 | SAVE_ALL | |
1594 | ||
1595 | /* | |
1596 | * First deactivate NMI | |
1597 | * or we cannot drop ET, cannot get window spill traps. | |
1598 | * The busy loop is necessary because the PIO error | |
1599 | * sometimes does not go away quickly and we trap again. | |
1600 | */ | |
1601 | sethi %hi(pcic_regs), %o1 | |
1602 | ld [%o1 + %lo(pcic_regs)], %o2 | |
1603 | ||
1604 | ! Get pending status for printouts later. | |
1605 | ld [%o2 + PCI_SYS_INT_PENDING], %o0 | |
1606 | ||
1607 | mov PCI_SYS_INT_PENDING_CLEAR_ALL, %o1 | |
1608 | stb %o1, [%o2 + PCI_SYS_INT_PENDING_CLEAR] | |
1609 | 1: | |
1610 | ld [%o2 + PCI_SYS_INT_PENDING], %o1 | |
1611 | andcc %o1, ((PCI_SYS_INT_PENDING_PIO|PCI_SYS_INT_PENDING_PCI)>>24), %g0 | |
1612 | bne 1b | |
1613 | nop | |
1614 | ||
1615 | or %l0, PSR_PIL, %l4 | |
1616 | wr %l4, 0x0, %psr | |
1617 | WRITE_PAUSE | |
1618 | wr %l4, PSR_ET, %psr | |
1619 | WRITE_PAUSE | |
1620 | ||
1621 | call pcic_nmi | |
1622 | add %sp, STACKFRAME_SZ, %o1 ! struct pt_regs *regs | |
1623 | RESTORE_ALL | |
1624 | ||
1625 | .globl pcic_nmi_trap_patch | |
1626 | pcic_nmi_trap_patch: | |
1627 | sethi %hi(linux_trap_ipi15_pcic), %l3 | |
1628 | jmpl %l3 + %lo(linux_trap_ipi15_pcic), %g0 | |
1629 | rd %psr, %l0 | |
1630 | .word 0 | |
1631 | ||
1632 | #endif /* CONFIG_PCI */ | |
1633 | ||
e2fdd7fd DM |
1634 | .globl flushw_all |
1635 | flushw_all: | |
1636 | save %sp, -0x40, %sp | |
1637 | save %sp, -0x40, %sp | |
1638 | save %sp, -0x40, %sp | |
1639 | save %sp, -0x40, %sp | |
1640 | save %sp, -0x40, %sp | |
1641 | save %sp, -0x40, %sp | |
1642 | save %sp, -0x40, %sp | |
1643 | restore | |
1644 | restore | |
1645 | restore | |
1646 | restore | |
1647 | restore | |
1648 | restore | |
1649 | ret | |
1650 | restore | |
1651 | ||
1da177e4 | 1652 | /* End of entry.S */ |