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review.evervolv.com / android_kernel_lge_hammerhead / 961f8bc9fc91c39a3fe169f3b6d3df1b096769d3 / . / arch / sparc64 / kernel / entry.S
blob: a47f2d0b1a29b326df9c813f53f455c4a5074c25 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1/* $Id: entry.S,v 1.144 2002/02/09 19:49:30 davem Exp $
2 * arch/sparc64/kernel/entry.S: Sparc64 trap low-level entry points.
3 *
4 * Copyright (C) 1995,1997 David S. Miller (davem@caip.rutgers.edu)
5 * Copyright (C) 1996 Eddie C. Dost (ecd@skynet.be)
6 * Copyright (C) 1996 Miguel de Icaza (miguel@nuclecu.unam.mx)
7 * Copyright (C) 1996,98,99 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
8 */
9
10#include <linux/config.h>
11#include <linux/errno.h>
12
13#include <asm/head.h>
14#include <asm/asi.h>
15#include <asm/smp.h>
16#include <asm/ptrace.h>
17#include <asm/page.h>
18#include <asm/signal.h>
19#include <asm/pgtable.h>
20#include <asm/processor.h>
21#include <asm/visasm.h>
22#include <asm/estate.h>
23#include <asm/auxio.h>
24
25/* #define SYSCALL_TRACING 1 */
26
27#define curptr g6
28
29#define NR_SYSCALLS 284 /* Each OS is different... */
30
31 .text
32 .align 32
33
34 .globl sparc64_vpte_patchme1
35 .globl sparc64_vpte_patchme2
36/*
37 * On a second level vpte miss, check whether the original fault is to the OBP
38 * range (note that this is only possible for instruction miss, data misses to
39 * obp range do not use vpte). If so, go back directly to the faulting address.
40 * This is because we want to read the tpc, otherwise we have no way of knowing
41 * the 8k aligned faulting address if we are using >8k kernel pagesize. This
42 * also ensures no vpte range addresses are dropped into tlb while obp is
43 * executing (see inherit_locked_prom_mappings() rant).
44 */
45sparc64_vpte_nucleus:
46 /* Load 0xf0000000, which is LOW_OBP_ADDRESS. */
47 mov 0xf, %g5
48 sllx %g5, 28, %g5
49
50 /* Is addr >= LOW_OBP_ADDRESS? */
51 cmp %g4, %g5
52 blu,pn %xcc, sparc64_vpte_patchme1
53 mov 0x1, %g5
54
55 /* Load 0x100000000, which is HI_OBP_ADDRESS. */
56 sllx %g5, 32, %g5
57
58 /* Is addr < HI_OBP_ADDRESS? */
59 cmp %g4, %g5
60 blu,pn %xcc, obp_iaddr_patch
61 nop
62
63 /* These two instructions are patched by paginig_init(). */
64sparc64_vpte_patchme1:
65 sethi %hi(0), %g5
66sparc64_vpte_patchme2:
67 or %g5, %lo(0), %g5
68
69 /* With kernel PGD in %g5, branch back into dtlb_backend. */
70 ba,pt %xcc, sparc64_kpte_continue
71 andn %g1, 0x3, %g1 /* Finish PMD offset adjustment. */
72
73vpte_noent:
74 /* Restore previous TAG_ACCESS, %g5 is zero, and we will
75 * skip over the trap instruction so that the top level
76 * TLB miss handler will thing this %g5 value is just an
77 * invalid PTE, thus branching to full fault processing.
78 */
79 mov TLB_SFSR, %g1
80 stxa %g4, [%g1 + %g1] ASI_DMMU
81 done
82
83 .globl obp_iaddr_patch
84obp_iaddr_patch:
85 /* These two instructions patched by inherit_prom_mappings(). */
86 sethi %hi(0), %g5
87 or %g5, %lo(0), %g5
88
89 /* Behave as if we are at TL0. */
90 wrpr %g0, 1, %tl
91 rdpr %tpc, %g4 /* Find original faulting iaddr */
92 srlx %g4, 13, %g4 /* Throw out context bits */
93 sllx %g4, 13, %g4 /* g4 has vpn + ctx0 now */
94
95 /* Restore previous TAG_ACCESS. */
96 mov TLB_SFSR, %g1
97 stxa %g4, [%g1 + %g1] ASI_IMMU
98
99 /* Get PMD offset. */
100 srlx %g4, 23, %g6
101 and %g6, 0x7ff, %g6
102 sllx %g6, 2, %g6
103
104 /* Load PMD, is it valid? */
105 lduwa [%g5 + %g6] ASI_PHYS_USE_EC, %g5
106 brz,pn %g5, longpath
107 sllx %g5, 11, %g5
108
109 /* Get PTE offset. */
110 srlx %g4, 13, %g6
111 and %g6, 0x3ff, %g6
112 sllx %g6, 3, %g6
113
114 /* Load PTE. */
115 ldxa [%g5 + %g6] ASI_PHYS_USE_EC, %g5
116 brgez,pn %g5, longpath
117 nop
118
119 /* TLB load and return from trap. */
120 stxa %g5, [%g0] ASI_ITLB_DATA_IN
121 retry
122
123 .globl obp_daddr_patch
124obp_daddr_patch:
125 /* These two instructions patched by inherit_prom_mappings(). */
126 sethi %hi(0), %g5
127 or %g5, %lo(0), %g5
128
129 /* Get PMD offset. */
130 srlx %g4, 23, %g6
131 and %g6, 0x7ff, %g6
132 sllx %g6, 2, %g6
133
134 /* Load PMD, is it valid? */
135 lduwa [%g5 + %g6] ASI_PHYS_USE_EC, %g5
136 brz,pn %g5, longpath
137 sllx %g5, 11, %g5
138
139 /* Get PTE offset. */
140 srlx %g4, 13, %g6
141 and %g6, 0x3ff, %g6
142 sllx %g6, 3, %g6
143
144 /* Load PTE. */
145 ldxa [%g5 + %g6] ASI_PHYS_USE_EC, %g5
146 brgez,pn %g5, longpath
147 nop
148
149 /* TLB load and return from trap. */
150 stxa %g5, [%g0] ASI_DTLB_DATA_IN
151 retry
152
153/*
154 * On a first level data miss, check whether this is to the OBP range (note
155 * that such accesses can be made by prom, as well as by kernel using
156 * prom_getproperty on "address"), and if so, do not use vpte access ...
157 * rather, use information saved during inherit_prom_mappings() using 8k
158 * pagesize.
159 */
160kvmap:
161 /* Load 0xf0000000, which is LOW_OBP_ADDRESS. */
162 mov 0xf, %g5
163 sllx %g5, 28, %g5
164
165 /* Is addr >= LOW_OBP_ADDRESS? */
166 cmp %g4, %g5
167 blu,pn %xcc, vmalloc_addr
168 mov 0x1, %g5
169
170 /* Load 0x100000000, which is HI_OBP_ADDRESS. */
171 sllx %g5, 32, %g5
172
173 /* Is addr < HI_OBP_ADDRESS? */
174 cmp %g4, %g5
175 blu,pn %xcc, obp_daddr_patch
176 nop
177
178vmalloc_addr:
179 /* If we get here, a vmalloc addr accessed, load kernel VPTE. */
180 ldxa [%g3 + %g6] ASI_N, %g5
181 brgez,pn %g5, longpath
182 nop
183
184 /* PTE is valid, load into TLB and return from trap. */
185 stxa %g5, [%g0] ASI_DTLB_DATA_IN ! Reload TLB
186 retry
187
188 /* This is trivial with the new code... */
189 .globl do_fpdis
190do_fpdis:
191 sethi %hi(TSTATE_PEF), %g4 ! IEU0
192 rdpr %tstate, %g5
193 andcc %g5, %g4, %g0
194 be,pt %xcc, 1f
195 nop
196 rd %fprs, %g5
197 andcc %g5, FPRS_FEF, %g0
198 be,pt %xcc, 1f
199 nop
200
201 /* Legal state when DCR_IFPOE is set in Cheetah %dcr. */
202 sethi %hi(109f), %g7
203 ba,pt %xcc, etrap
204109: or %g7, %lo(109b), %g7
205 add %g0, %g0, %g0
206 ba,a,pt %xcc, rtrap_clr_l6
207
2081: ldub [%g6 + TI_FPSAVED], %g5 ! Load Group
209 wr %g0, FPRS_FEF, %fprs ! LSU Group+4bubbles
210 andcc %g5, FPRS_FEF, %g0 ! IEU1 Group
211 be,a,pt %icc, 1f ! CTI
212 clr %g7 ! IEU0
213 ldx [%g6 + TI_GSR], %g7 ! Load Group
2141: andcc %g5, FPRS_DL, %g0 ! IEU1
215 bne,pn %icc, 2f ! CTI
216 fzero %f0 ! FPA
217 andcc %g5, FPRS_DU, %g0 ! IEU1 Group
218 bne,pn %icc, 1f ! CTI
219 fzero %f2 ! FPA
220 faddd %f0, %f2, %f4
221 fmuld %f0, %f2, %f6
222 faddd %f0, %f2, %f8
223 fmuld %f0, %f2, %f10
224 faddd %f0, %f2, %f12
225 fmuld %f0, %f2, %f14
226 faddd %f0, %f2, %f16
227 fmuld %f0, %f2, %f18
228 faddd %f0, %f2, %f20
229 fmuld %f0, %f2, %f22
230 faddd %f0, %f2, %f24
231 fmuld %f0, %f2, %f26
232 faddd %f0, %f2, %f28
233 fmuld %f0, %f2, %f30
234 faddd %f0, %f2, %f32
235 fmuld %f0, %f2, %f34
236 faddd %f0, %f2, %f36
237 fmuld %f0, %f2, %f38
238 faddd %f0, %f2, %f40
239 fmuld %f0, %f2, %f42
240 faddd %f0, %f2, %f44
241 fmuld %f0, %f2, %f46
242 faddd %f0, %f2, %f48
243 fmuld %f0, %f2, %f50
244 faddd %f0, %f2, %f52
245 fmuld %f0, %f2, %f54
246 faddd %f0, %f2, %f56
247 fmuld %f0, %f2, %f58
248 b,pt %xcc, fpdis_exit2
249 faddd %f0, %f2, %f60
2501: mov SECONDARY_CONTEXT, %g3
251 add %g6, TI_FPREGS + 0x80, %g1
252 faddd %f0, %f2, %f4
253 fmuld %f0, %f2, %f6
254 ldxa [%g3] ASI_DMMU, %g5
255cplus_fptrap_insn_1:
256 sethi %hi(0), %g2
257 stxa %g2, [%g3] ASI_DMMU
258 membar #Sync
259 add %g6, TI_FPREGS + 0xc0, %g2
260 faddd %f0, %f2, %f8
261 fmuld %f0, %f2, %f10
262 ldda [%g1] ASI_BLK_S, %f32 ! grrr, where is ASI_BLK_NUCLEUS 8-(
263 ldda [%g2] ASI_BLK_S, %f48
264 faddd %f0, %f2, %f12
265 fmuld %f0, %f2, %f14
266 faddd %f0, %f2, %f16
267 fmuld %f0, %f2, %f18
268 faddd %f0, %f2, %f20
269 fmuld %f0, %f2, %f22
270 faddd %f0, %f2, %f24
271 fmuld %f0, %f2, %f26
272 faddd %f0, %f2, %f28
273 fmuld %f0, %f2, %f30
274 b,pt %xcc, fpdis_exit
275 membar #Sync
2762: andcc %g5, FPRS_DU, %g0
277 bne,pt %icc, 3f
278 fzero %f32
279 mov SECONDARY_CONTEXT, %g3
280 fzero %f34
281 ldxa [%g3] ASI_DMMU, %g5
282 add %g6, TI_FPREGS, %g1
283cplus_fptrap_insn_2:
284 sethi %hi(0), %g2
285 stxa %g2, [%g3] ASI_DMMU
286 membar #Sync
287 add %g6, TI_FPREGS + 0x40, %g2
288 faddd %f32, %f34, %f36
289 fmuld %f32, %f34, %f38
290 ldda [%g1] ASI_BLK_S, %f0 ! grrr, where is ASI_BLK_NUCLEUS 8-(
291 ldda [%g2] ASI_BLK_S, %f16
292 faddd %f32, %f34, %f40
293 fmuld %f32, %f34, %f42
294 faddd %f32, %f34, %f44
295 fmuld %f32, %f34, %f46
296 faddd %f32, %f34, %f48
297 fmuld %f32, %f34, %f50
298 faddd %f32, %f34, %f52
299 fmuld %f32, %f34, %f54
300 faddd %f32, %f34, %f56
301 fmuld %f32, %f34, %f58
302 faddd %f32, %f34, %f60
303 fmuld %f32, %f34, %f62
304 ba,pt %xcc, fpdis_exit
305 membar #Sync
3063: mov SECONDARY_CONTEXT, %g3
307 add %g6, TI_FPREGS, %g1
308 ldxa [%g3] ASI_DMMU, %g5
309cplus_fptrap_insn_3:
310 sethi %hi(0), %g2
311 stxa %g2, [%g3] ASI_DMMU
312 membar #Sync
313 mov 0x40, %g2
314 ldda [%g1] ASI_BLK_S, %f0 ! grrr, where is ASI_BLK_NUCLEUS 8-(
315 ldda [%g1 + %g2] ASI_BLK_S, %f16
316 add %g1, 0x80, %g1
317 ldda [%g1] ASI_BLK_S, %f32
318 ldda [%g1 + %g2] ASI_BLK_S, %f48
319 membar #Sync
320fpdis_exit:
321 stxa %g5, [%g3] ASI_DMMU
322 membar #Sync
323fpdis_exit2:
324 wr %g7, 0, %gsr
325 ldx [%g6 + TI_XFSR], %fsr
326 rdpr %tstate, %g3
327 or %g3, %g4, %g3 ! anal...
328 wrpr %g3, %tstate
329 wr %g0, FPRS_FEF, %fprs ! clean DU/DL bits
330 retry
331
332 .align 32
333fp_other_bounce:
334 call do_fpother
335 add %sp, PTREGS_OFF, %o0
336 ba,pt %xcc, rtrap
337 clr %l6
338
339 .globl do_fpother_check_fitos
340 .align 32
341do_fpother_check_fitos:
342 sethi %hi(fp_other_bounce - 4), %g7
343 or %g7, %lo(fp_other_bounce - 4), %g7
344
345 /* NOTE: Need to preserve %g7 until we fully commit
346 * to the fitos fixup.
347 */
348 stx %fsr, [%g6 + TI_XFSR]
349 rdpr %tstate, %g3
350 andcc %g3, TSTATE_PRIV, %g0
351 bne,pn %xcc, do_fptrap_after_fsr
352 nop
353 ldx [%g6 + TI_XFSR], %g3
354 srlx %g3, 14, %g1
355 and %g1, 7, %g1
356 cmp %g1, 2 ! Unfinished FP-OP
357 bne,pn %xcc, do_fptrap_after_fsr
358 sethi %hi(1 << 23), %g1 ! Inexact
359 andcc %g3, %g1, %g0
360 bne,pn %xcc, do_fptrap_after_fsr
361 rdpr %tpc, %g1
362 lduwa [%g1] ASI_AIUP, %g3 ! This cannot ever fail
363#define FITOS_MASK 0xc1f83fe0
364#define FITOS_COMPARE 0x81a01880
365 sethi %hi(FITOS_MASK), %g1
366 or %g1, %lo(FITOS_MASK), %g1
367 and %g3, %g1, %g1
368 sethi %hi(FITOS_COMPARE), %g2
369 or %g2, %lo(FITOS_COMPARE), %g2
370 cmp %g1, %g2
371 bne,pn %xcc, do_fptrap_after_fsr
372 nop
373 std %f62, [%g6 + TI_FPREGS + (62 * 4)]
374 sethi %hi(fitos_table_1), %g1
375 and %g3, 0x1f, %g2
376 or %g1, %lo(fitos_table_1), %g1
377 sllx %g2, 2, %g2
378 jmpl %g1 + %g2, %g0
379 ba,pt %xcc, fitos_emul_continue
380
381fitos_table_1:
382 fitod %f0, %f62
383 fitod %f1, %f62
384 fitod %f2, %f62
385 fitod %f3, %f62
386 fitod %f4, %f62
387 fitod %f5, %f62
388 fitod %f6, %f62
389 fitod %f7, %f62
390 fitod %f8, %f62
391 fitod %f9, %f62
392 fitod %f10, %f62
393 fitod %f11, %f62
394 fitod %f12, %f62
395 fitod %f13, %f62
396 fitod %f14, %f62
397 fitod %f15, %f62
398 fitod %f16, %f62
399 fitod %f17, %f62
400 fitod %f18, %f62
401 fitod %f19, %f62
402 fitod %f20, %f62
403 fitod %f21, %f62
404 fitod %f22, %f62
405 fitod %f23, %f62
406 fitod %f24, %f62
407 fitod %f25, %f62
408 fitod %f26, %f62
409 fitod %f27, %f62
410 fitod %f28, %f62
411 fitod %f29, %f62
412 fitod %f30, %f62
413 fitod %f31, %f62
414
415fitos_emul_continue:
416 sethi %hi(fitos_table_2), %g1
417 srl %g3, 25, %g2
418 or %g1, %lo(fitos_table_2), %g1
419 and %g2, 0x1f, %g2
420 sllx %g2, 2, %g2
421 jmpl %g1 + %g2, %g0
422 ba,pt %xcc, fitos_emul_fini
423
424fitos_table_2:
425 fdtos %f62, %f0
426 fdtos %f62, %f1
427 fdtos %f62, %f2
428 fdtos %f62, %f3
429 fdtos %f62, %f4
430 fdtos %f62, %f5
431 fdtos %f62, %f6
432 fdtos %f62, %f7
433 fdtos %f62, %f8
434 fdtos %f62, %f9
435 fdtos %f62, %f10
436 fdtos %f62, %f11
437 fdtos %f62, %f12
438 fdtos %f62, %f13
439 fdtos %f62, %f14
440 fdtos %f62, %f15
441 fdtos %f62, %f16
442 fdtos %f62, %f17
443 fdtos %f62, %f18
444 fdtos %f62, %f19
445 fdtos %f62, %f20
446 fdtos %f62, %f21
447 fdtos %f62, %f22
448 fdtos %f62, %f23
449 fdtos %f62, %f24
450 fdtos %f62, %f25
451 fdtos %f62, %f26
452 fdtos %f62, %f27
453 fdtos %f62, %f28
454 fdtos %f62, %f29
455 fdtos %f62, %f30
456 fdtos %f62, %f31
457
458fitos_emul_fini:
459 ldd [%g6 + TI_FPREGS + (62 * 4)], %f62
460 done
461
462 .globl do_fptrap
463 .align 32
464do_fptrap:
465 stx %fsr, [%g6 + TI_XFSR]
466do_fptrap_after_fsr:
467 ldub [%g6 + TI_FPSAVED], %g3
468 rd %fprs, %g1
469 or %g3, %g1, %g3
470 stb %g3, [%g6 + TI_FPSAVED]
471 rd %gsr, %g3
472 stx %g3, [%g6 + TI_GSR]
473 mov SECONDARY_CONTEXT, %g3
474 ldxa [%g3] ASI_DMMU, %g5
475cplus_fptrap_insn_4:
476 sethi %hi(0), %g2
477 stxa %g2, [%g3] ASI_DMMU
478 membar #Sync
479 add %g6, TI_FPREGS, %g2
480 andcc %g1, FPRS_DL, %g0
481 be,pn %icc, 4f
482 mov 0x40, %g3
483 stda %f0, [%g2] ASI_BLK_S
484 stda %f16, [%g2 + %g3] ASI_BLK_S
485 andcc %g1, FPRS_DU, %g0
486 be,pn %icc, 5f
4874: add %g2, 128, %g2
488 stda %f32, [%g2] ASI_BLK_S
489 stda %f48, [%g2 + %g3] ASI_BLK_S
4905: mov SECONDARY_CONTEXT, %g1
491 membar #Sync
492 stxa %g5, [%g1] ASI_DMMU
493 membar #Sync
494 ba,pt %xcc, etrap
495 wr %g0, 0, %fprs
496
497cplus_fptrap_1:
498 sethi %hi(CTX_CHEETAH_PLUS_CTX0), %g2
499
500 .globl cheetah_plus_patch_fpdis
501cheetah_plus_patch_fpdis:
502 /* We configure the dTLB512_0 for 4MB pages and the
503 * dTLB512_1 for 8K pages when in context zero.
504 */
505 sethi %hi(cplus_fptrap_1), %o0
506 lduw [%o0 + %lo(cplus_fptrap_1)], %o1
507
508 set cplus_fptrap_insn_1, %o2
509 stw %o1, [%o2]
510 flush %o2
511 set cplus_fptrap_insn_2, %o2
512 stw %o1, [%o2]
513 flush %o2
514 set cplus_fptrap_insn_3, %o2
515 stw %o1, [%o2]
516 flush %o2
517 set cplus_fptrap_insn_4, %o2
518 stw %o1, [%o2]
519 flush %o2
520
521 retl
522 nop
523
524 /* The registers for cross calls will be:
525 *
526 * DATA 0: [low 32-bits] Address of function to call, jmp to this
527 * [high 32-bits] MMU Context Argument 0, place in %g5
528 * DATA 1: Address Argument 1, place in %g6
529 * DATA 2: Address Argument 2, place in %g7
530 *
531 * With this method we can do most of the cross-call tlb/cache
532 * flushing very quickly.
533 *
534 * Current CPU's IRQ worklist table is locked into %g1,
535 * don't touch.
536 */
537 .text
538 .align 32
539 .globl do_ivec
540do_ivec:
541 mov 0x40, %g3
542 ldxa [%g3 + %g0] ASI_INTR_R, %g3
543 sethi %hi(KERNBASE), %g4
544 cmp %g3, %g4
545 bgeu,pn %xcc, do_ivec_xcall
546 srlx %g3, 32, %g5
547 stxa %g0, [%g0] ASI_INTR_RECEIVE
548 membar #Sync
549
550 sethi %hi(ivector_table), %g2
551 sllx %g3, 5, %g3
552 or %g2, %lo(ivector_table), %g2
553 add %g2, %g3, %g3
554 ldx [%g3 + 0x08], %g2 /* irq_info */
555 ldub [%g3 + 0x04], %g4 /* pil */
556 brz,pn %g2, do_ivec_spurious
557 mov 1, %g2
558
559 sllx %g2, %g4, %g2
560 sllx %g4, 2, %g4
561 lduw [%g6 + %g4], %g5 /* g5 = irq_work(cpu, pil) */
562 stw %g5, [%g3 + 0x00] /* bucket->irq_chain = g5 */
563 stw %g3, [%g6 + %g4] /* irq_work(cpu, pil) = bucket */
564 wr %g2, 0x0, %set_softint
565 retry
566do_ivec_xcall:
567 mov 0x50, %g1
568
569 ldxa [%g1 + %g0] ASI_INTR_R, %g1
570 srl %g3, 0, %g3
571 mov 0x60, %g7
572 ldxa [%g7 + %g0] ASI_INTR_R, %g7
573 stxa %g0, [%g0] ASI_INTR_RECEIVE
574 membar #Sync
575 ba,pt %xcc, 1f
576 nop
577
578 .align 32
5791: jmpl %g3, %g0
580 nop
581
582do_ivec_spurious:
583 stw %g3, [%g6 + 0x00] /* irq_work(cpu, 0) = bucket */
584 rdpr %pstate, %g5
585
586 wrpr %g5, PSTATE_IG | PSTATE_AG, %pstate
587 sethi %hi(109f), %g7
588 ba,pt %xcc, etrap
589109: or %g7, %lo(109b), %g7
590 call catch_disabled_ivec
591 add %sp, PTREGS_OFF, %o0
592 ba,pt %xcc, rtrap
593 clr %l6
594
595 .globl save_alternate_globals
596save_alternate_globals: /* %o0 = save_area */
597 rdpr %pstate, %o5
598 andn %o5, PSTATE_IE, %o1
599 wrpr %o1, PSTATE_AG, %pstate
600 stx %g0, [%o0 + 0x00]
601 stx %g1, [%o0 + 0x08]
602 stx %g2, [%o0 + 0x10]
603 stx %g3, [%o0 + 0x18]
604 stx %g4, [%o0 + 0x20]
605 stx %g5, [%o0 + 0x28]
606 stx %g6, [%o0 + 0x30]
607 stx %g7, [%o0 + 0x38]
608 wrpr %o1, PSTATE_IG, %pstate
609 stx %g0, [%o0 + 0x40]
610 stx %g1, [%o0 + 0x48]
611 stx %g2, [%o0 + 0x50]
612 stx %g3, [%o0 + 0x58]
613 stx %g4, [%o0 + 0x60]
614 stx %g5, [%o0 + 0x68]
615 stx %g6, [%o0 + 0x70]
616 stx %g7, [%o0 + 0x78]
617 wrpr %o1, PSTATE_MG, %pstate
618 stx %g0, [%o0 + 0x80]
619 stx %g1, [%o0 + 0x88]
620 stx %g2, [%o0 + 0x90]
621 stx %g3, [%o0 + 0x98]
622 stx %g4, [%o0 + 0xa0]
623 stx %g5, [%o0 + 0xa8]
624 stx %g6, [%o0 + 0xb0]
625 stx %g7, [%o0 + 0xb8]
626 wrpr %o5, 0x0, %pstate
627 retl
628 nop
629
630 .globl restore_alternate_globals
631restore_alternate_globals: /* %o0 = save_area */
632 rdpr %pstate, %o5
633 andn %o5, PSTATE_IE, %o1
634 wrpr %o1, PSTATE_AG, %pstate
635 ldx [%o0 + 0x00], %g0
636 ldx [%o0 + 0x08], %g1
637 ldx [%o0 + 0x10], %g2
638 ldx [%o0 + 0x18], %g3
639 ldx [%o0 + 0x20], %g4
640 ldx [%o0 + 0x28], %g5
641 ldx [%o0 + 0x30], %g6
642 ldx [%o0 + 0x38], %g7
643 wrpr %o1, PSTATE_IG, %pstate
644 ldx [%o0 + 0x40], %g0
645 ldx [%o0 + 0x48], %g1
646 ldx [%o0 + 0x50], %g2
647 ldx [%o0 + 0x58], %g3
648 ldx [%o0 + 0x60], %g4
649 ldx [%o0 + 0x68], %g5
650 ldx [%o0 + 0x70], %g6
651 ldx [%o0 + 0x78], %g7
652 wrpr %o1, PSTATE_MG, %pstate
653 ldx [%o0 + 0x80], %g0
654 ldx [%o0 + 0x88], %g1
655 ldx [%o0 + 0x90], %g2
656 ldx [%o0 + 0x98], %g3
657 ldx [%o0 + 0xa0], %g4
658 ldx [%o0 + 0xa8], %g5
659 ldx [%o0 + 0xb0], %g6
660 ldx [%o0 + 0xb8], %g7
661 wrpr %o5, 0x0, %pstate
662 retl
663 nop
664
665 .globl getcc, setcc
666getcc:
667 ldx [%o0 + PT_V9_TSTATE], %o1
668 srlx %o1, 32, %o1
669 and %o1, 0xf, %o1
670 retl
671 stx %o1, [%o0 + PT_V9_G1]
672setcc:
673 ldx [%o0 + PT_V9_TSTATE], %o1
674 ldx [%o0 + PT_V9_G1], %o2
675 or %g0, %ulo(TSTATE_ICC), %o3
676 sllx %o3, 32, %o3
677 andn %o1, %o3, %o1
678 sllx %o2, 32, %o2
679 and %o2, %o3, %o2
680 or %o1, %o2, %o1
681 retl
682 stx %o1, [%o0 + PT_V9_TSTATE]
683
684 .globl utrap, utrap_ill
685utrap: brz,pn %g1, etrap
686 nop
687 save %sp, -128, %sp
688 rdpr %tstate, %l6
689 rdpr %cwp, %l7
690 andn %l6, TSTATE_CWP, %l6
691 wrpr %l6, %l7, %tstate
692 rdpr %tpc, %l6
693 rdpr %tnpc, %l7
694 wrpr %g1, 0, %tnpc
695 done
696utrap_ill:
697 call bad_trap
698 add %sp, PTREGS_OFF, %o0
699 ba,pt %xcc, rtrap
700 clr %l6
701
702#ifdef CONFIG_BLK_DEV_FD
703 .globl floppy_hardint
704floppy_hardint:
705 wr %g0, (1 << 11), %clear_softint
706 sethi %hi(doing_pdma), %g1
707 ld [%g1 + %lo(doing_pdma)], %g2
708 brz,pn %g2, floppy_dosoftint
709 sethi %hi(fdc_status), %g3
710 ldx [%g3 + %lo(fdc_status)], %g3
711 sethi %hi(pdma_vaddr), %g5
712 ldx [%g5 + %lo(pdma_vaddr)], %g4
713 sethi %hi(pdma_size), %g5
714 ldx [%g5 + %lo(pdma_size)], %g5
715
716next_byte:
717 lduba [%g3] ASI_PHYS_BYPASS_EC_E, %g7
718 andcc %g7, 0x80, %g0
719 be,pn %icc, floppy_fifo_emptied
720 andcc %g7, 0x20, %g0
721 be,pn %icc, floppy_overrun
722 andcc %g7, 0x40, %g0
723 be,pn %icc, floppy_write
724 sub %g5, 1, %g5
725
726 inc %g3
727 lduba [%g3] ASI_PHYS_BYPASS_EC_E, %g7
728 dec %g3
729 orcc %g0, %g5, %g0
730 stb %g7, [%g4]
731 bne,pn %xcc, next_byte
732 add %g4, 1, %g4
733
734 b,pt %xcc, floppy_tdone
735 nop
736
737floppy_write:
738 ldub [%g4], %g7
739 orcc %g0, %g5, %g0
740 inc %g3
741 stba %g7, [%g3] ASI_PHYS_BYPASS_EC_E
742 dec %g3
743 bne,pn %xcc, next_byte
744 add %g4, 1, %g4
745
746floppy_tdone:
747 sethi %hi(pdma_vaddr), %g1
748 stx %g4, [%g1 + %lo(pdma_vaddr)]
749 sethi %hi(pdma_size), %g1
750 stx %g5, [%g1 + %lo(pdma_size)]
751 sethi %hi(auxio_register), %g1
752 ldx [%g1 + %lo(auxio_register)], %g7
753 lduba [%g7] ASI_PHYS_BYPASS_EC_E, %g5
754 or %g5, AUXIO_AUX1_FTCNT, %g5
755/* andn %g5, AUXIO_AUX1_MASK, %g5 */
756 stba %g5, [%g7] ASI_PHYS_BYPASS_EC_E
757 andn %g5, AUXIO_AUX1_FTCNT, %g5
758/* andn %g5, AUXIO_AUX1_MASK, %g5 */
759
760 nop; nop; nop; nop; nop; nop;
761 nop; nop; nop; nop; nop; nop;
762
763 stba %g5, [%g7] ASI_PHYS_BYPASS_EC_E
764 sethi %hi(doing_pdma), %g1
765 b,pt %xcc, floppy_dosoftint
766 st %g0, [%g1 + %lo(doing_pdma)]
767
768floppy_fifo_emptied:
769 sethi %hi(pdma_vaddr), %g1
770 stx %g4, [%g1 + %lo(pdma_vaddr)]
771 sethi %hi(pdma_size), %g1
772 stx %g5, [%g1 + %lo(pdma_size)]
773 sethi %hi(irq_action), %g1
774 or %g1, %lo(irq_action), %g1
775 ldx [%g1 + (11 << 3)], %g3 ! irqaction[floppy_irq]
776 ldx [%g3 + 0x08], %g4 ! action->flags>>48==ino
777 sethi %hi(ivector_table), %g3
778 srlx %g4, 48, %g4
779 or %g3, %lo(ivector_table), %g3
780 sllx %g4, 5, %g4
781 ldx [%g3 + %g4], %g4 ! &ivector_table[ino]
782 ldx [%g4 + 0x10], %g4 ! bucket->iclr
783 stwa %g0, [%g4] ASI_PHYS_BYPASS_EC_E ! ICLR_IDLE
784 membar #Sync ! probably not needed...
785 retry
786
787floppy_overrun:
788 sethi %hi(pdma_vaddr), %g1
789 stx %g4, [%g1 + %lo(pdma_vaddr)]
790 sethi %hi(pdma_size), %g1
791 stx %g5, [%g1 + %lo(pdma_size)]
792 sethi %hi(doing_pdma), %g1
793 st %g0, [%g1 + %lo(doing_pdma)]
794
795floppy_dosoftint:
796 rdpr %pil, %g2
797 wrpr %g0, 15, %pil
798 sethi %hi(109f), %g7
799 b,pt %xcc, etrap_irq
800109: or %g7, %lo(109b), %g7
801
802 mov 11, %o0
803 mov 0, %o1
804 call sparc_floppy_irq
805 add %sp, PTREGS_OFF, %o2
806
807 b,pt %xcc, rtrap_irq
808 nop
809
810#endif /* CONFIG_BLK_DEV_FD */
811
812 /* XXX Here is stuff we still need to write... -DaveM XXX */
813 .globl netbsd_syscall
814netbsd_syscall:
815 retl
816 nop
817
818 /* These next few routines must be sure to clear the
819 * SFSR FaultValid bit so that the fast tlb data protection
820 * handler does not flush the wrong context and lock up the
821 * box.
822 */
823 .globl __do_data_access_exception
824 .globl __do_data_access_exception_tl1
825__do_data_access_exception_tl1:
826 rdpr %pstate, %g4
827 wrpr %g4, PSTATE_MG|PSTATE_AG, %pstate
828 mov TLB_SFSR, %g3
829 mov DMMU_SFAR, %g5
830 ldxa [%g3] ASI_DMMU, %g4 ! Get SFSR
831 ldxa [%g5] ASI_DMMU, %g5 ! Get SFAR
832 stxa %g0, [%g3] ASI_DMMU ! Clear SFSR.FaultValid bit
833 membar #Sync
834 ba,pt %xcc, winfix_dax
835 rdpr %tpc, %g3
836__do_data_access_exception:
837 rdpr %pstate, %g4
838 wrpr %g4, PSTATE_MG|PSTATE_AG, %pstate
839 mov TLB_SFSR, %g3
840 mov DMMU_SFAR, %g5
841 ldxa [%g3] ASI_DMMU, %g4 ! Get SFSR
842 ldxa [%g5] ASI_DMMU, %g5 ! Get SFAR
843 stxa %g0, [%g3] ASI_DMMU ! Clear SFSR.FaultValid bit
844 membar #Sync
845 sethi %hi(109f), %g7
846 ba,pt %xcc, etrap
847109: or %g7, %lo(109b), %g7
848 mov %l4, %o1
849 mov %l5, %o2
850 call data_access_exception
851 add %sp, PTREGS_OFF, %o0
852 ba,pt %xcc, rtrap
853 clr %l6
854
855 .globl __do_instruction_access_exception
856 .globl __do_instruction_access_exception_tl1
857__do_instruction_access_exception_tl1:
858 rdpr %pstate, %g4
859 wrpr %g4, PSTATE_MG|PSTATE_AG, %pstate
860 mov TLB_SFSR, %g3
861 mov DMMU_SFAR, %g5
862 ldxa [%g3] ASI_DMMU, %g4 ! Get SFSR
863 ldxa [%g5] ASI_DMMU, %g5 ! Get SFAR
864 stxa %g0, [%g3] ASI_IMMU ! Clear FaultValid bit
865 membar #Sync
866 sethi %hi(109f), %g7
867 ba,pt %xcc, etraptl1
868109: or %g7, %lo(109b), %g7
869 mov %l4, %o1
870 mov %l5, %o2
871 call instruction_access_exception_tl1
872 add %sp, PTREGS_OFF, %o0
873 ba,pt %xcc, rtrap
874 clr %l6
875
876__do_instruction_access_exception:
877 rdpr %pstate, %g4
878 wrpr %g4, PSTATE_MG|PSTATE_AG, %pstate
879 mov TLB_SFSR, %g3
880 mov DMMU_SFAR, %g5
881 ldxa [%g3] ASI_DMMU, %g4 ! Get SFSR
882 ldxa [%g5] ASI_DMMU, %g5 ! Get SFAR
883 stxa %g0, [%g3] ASI_IMMU ! Clear FaultValid bit
884 membar #Sync
885 sethi %hi(109f), %g7
886 ba,pt %xcc, etrap
887109: or %g7, %lo(109b), %g7
888 mov %l4, %o1
889 mov %l5, %o2
890 call instruction_access_exception
891 add %sp, PTREGS_OFF, %o0
892 ba,pt %xcc, rtrap
893 clr %l6
894
895 /* This is the trap handler entry point for ECC correctable
896 * errors. They are corrected, but we listen for the trap
897 * so that the event can be logged.
898 *
899 * Disrupting errors are either:
900 * 1) single-bit ECC errors during UDB reads to system
901 * memory
902 * 2) data parity errors during write-back events
903 *
904 * As far as I can make out from the manual, the CEE trap
905 * is only for correctable errors during memory read
906 * accesses by the front-end of the processor.
907 *
908 * The code below is only for trap level 1 CEE events,
909 * as it is the only situation where we can safely record
910 * and log. For trap level >1 we just clear the CE bit
911 * in the AFSR and return.
912 */
913
914 /* Our trap handling infrastructure allows us to preserve
915 * two 64-bit values during etrap for arguments to
916 * subsequent C code. Therefore we encode the information
917 * as follows:
918 *
919 * value 1) Full 64-bits of AFAR
920 * value 2) Low 33-bits of AFSR, then bits 33-->42
921 * are UDBL error status and bits 43-->52
922 * are UDBH error status
923 */
924 .align 64
925 .globl cee_trap
926cee_trap:
927 ldxa [%g0] ASI_AFSR, %g1 ! Read AFSR
928 ldxa [%g0] ASI_AFAR, %g2 ! Read AFAR
929 sllx %g1, 31, %g1 ! Clear reserved bits
930 srlx %g1, 31, %g1 ! in AFSR
931
932 /* NOTE: UltraSparc-I/II have high and low UDB error
933 * registers, corresponding to the two UDB units
934 * present on those chips. UltraSparc-IIi only
935 * has a single UDB, called "SDB" in the manual.
936 * For IIi the upper UDB register always reads
937 * as zero so for our purposes things will just
938 * work with the checks below.
939 */
940 ldxa [%g0] ASI_UDBL_ERROR_R, %g3 ! Read UDB-Low error status
941 andcc %g3, (1 << 8), %g4 ! Check CE bit
942 sllx %g3, (64 - 10), %g3 ! Clear reserved bits
943 srlx %g3, (64 - 10), %g3 ! in UDB-Low error status
944
945 sllx %g3, (33 + 0), %g3 ! Shift up to encoding area
946 or %g1, %g3, %g1 ! Or it in
947 be,pn %xcc, 1f ! Branch if CE bit was clear
948 nop
949 stxa %g4, [%g0] ASI_UDB_ERROR_W ! Clear CE sticky bit in UDBL
950 membar #Sync ! Synchronize ASI stores
9511: mov 0x18, %g5 ! Addr of UDB-High error status
952 ldxa [%g5] ASI_UDBH_ERROR_R, %g3 ! Read it
953
954 andcc %g3, (1 << 8), %g4 ! Check CE bit
955 sllx %g3, (64 - 10), %g3 ! Clear reserved bits
956 srlx %g3, (64 - 10), %g3 ! in UDB-High error status
957 sllx %g3, (33 + 10), %g3 ! Shift up to encoding area
958 or %g1, %g3, %g1 ! Or it in
959 be,pn %xcc, 1f ! Branch if CE bit was clear
960 nop
961 nop
962
963 stxa %g4, [%g5] ASI_UDB_ERROR_W ! Clear CE sticky bit in UDBH
964 membar #Sync ! Synchronize ASI stores
9651: mov 1, %g5 ! AFSR CE bit is
966 sllx %g5, 20, %g5 ! bit 20
967 stxa %g5, [%g0] ASI_AFSR ! Clear CE sticky bit in AFSR
968 membar #Sync ! Synchronize ASI stores
969 sllx %g2, (64 - 41), %g2 ! Clear reserved bits
970 srlx %g2, (64 - 41), %g2 ! in latched AFAR
971
972 andn %g2, 0x0f, %g2 ! Finish resv bit clearing
973 mov %g1, %g4 ! Move AFSR+UDB* into save reg
974 mov %g2, %g5 ! Move AFAR into save reg
975 rdpr %pil, %g2
976 wrpr %g0, 15, %pil
977 ba,pt %xcc, etrap_irq
978 rd %pc, %g7
979 mov %l4, %o0
980
981 mov %l5, %o1
982 call cee_log
983 add %sp, PTREGS_OFF, %o2
984 ba,a,pt %xcc, rtrap_irq
985
986 /* Capture I/D/E-cache state into per-cpu error scoreboard.
987 *
988 * %g1: (TL>=0) ? 1 : 0
989 * %g2: scratch
990 * %g3: scratch
991 * %g4: AFSR
992 * %g5: AFAR
993 * %g6: current thread ptr
994 * %g7: scratch
995 */
996#define CHEETAH_LOG_ERROR \
997 /* Put "TL1" software bit into AFSR. */ \
998 and %g1, 0x1, %g1; \
999 sllx %g1, 63, %g2; \
1000 or %g4, %g2, %g4; \
1001 /* Get log entry pointer for this cpu at this trap level. */ \
1002 BRANCH_IF_JALAPENO(g2,g3,50f) \
1003 ldxa [%g0] ASI_SAFARI_CONFIG, %g2; \
1004 srlx %g2, 17, %g2; \
1005 ba,pt %xcc, 60f; \
1006 and %g2, 0x3ff, %g2; \
100750: ldxa [%g0] ASI_JBUS_CONFIG, %g2; \
1008 srlx %g2, 17, %g2; \
1009 and %g2, 0x1f, %g2; \
101060: sllx %g2, 9, %g2; \
1011 sethi %hi(cheetah_error_log), %g3; \
1012 ldx [%g3 + %lo(cheetah_error_log)], %g3; \
1013 brz,pn %g3, 80f; \
1014 nop; \
1015 add %g3, %g2, %g3; \
1016 sllx %g1, 8, %g1; \
1017 add %g3, %g1, %g1; \
1018 /* %g1 holds pointer to the top of the logging scoreboard */ \
1019 ldx [%g1 + 0x0], %g7; \
1020 cmp %g7, -1; \
1021 bne,pn %xcc, 80f; \
1022 nop; \
1023 stx %g4, [%g1 + 0x0]; \
1024 stx %g5, [%g1 + 0x8]; \
1025 add %g1, 0x10, %g1; \
1026 /* %g1 now points to D-cache logging area */ \
1027 set 0x3ff8, %g2; /* DC_addr mask */ \
1028 and %g5, %g2, %g2; /* DC_addr bits of AFAR */ \
1029 srlx %g5, 12, %g3; \
1030 or %g3, 1, %g3; /* PHYS tag + valid */ \
103110: ldxa [%g2] ASI_DCACHE_TAG, %g7; \
1032 cmp %g3, %g7; /* TAG match? */ \
1033 bne,pt %xcc, 13f; \
1034 nop; \
1035 /* Yep, what we want, capture state. */ \
1036 stx %g2, [%g1 + 0x20]; \
1037 stx %g7, [%g1 + 0x28]; \
1038 /* A membar Sync is required before and after utag access. */ \
1039 membar #Sync; \
1040 ldxa [%g2] ASI_DCACHE_UTAG, %g7; \
1041 membar #Sync; \
1042 stx %g7, [%g1 + 0x30]; \
1043 ldxa [%g2] ASI_DCACHE_SNOOP_TAG, %g7; \
1044 stx %g7, [%g1 + 0x38]; \
1045 clr %g3; \
104612: ldxa [%g2 + %g3] ASI_DCACHE_DATA, %g7; \
1047 stx %g7, [%g1]; \
1048 add %g3, (1 << 5), %g3; \
1049 cmp %g3, (4 << 5); \
1050 bl,pt %xcc, 12b; \
1051 add %g1, 0x8, %g1; \
1052 ba,pt %xcc, 20f; \
1053 add %g1, 0x20, %g1; \
105413: sethi %hi(1 << 14), %g7; \
1055 add %g2, %g7, %g2; \
1056 srlx %g2, 14, %g7; \
1057 cmp %g7, 4; \
1058 bl,pt %xcc, 10b; \
1059 nop; \
1060 add %g1, 0x40, %g1; \
106120: /* %g1 now points to I-cache logging area */ \
1062 set 0x1fe0, %g2; /* IC_addr mask */ \
1063 and %g5, %g2, %g2; /* IC_addr bits of AFAR */ \
1064 sllx %g2, 1, %g2; /* IC_addr[13:6]==VA[12:5] */ \
1065 srlx %g5, (13 - 8), %g3; /* Make PTAG */ \
1066 andn %g3, 0xff, %g3; /* Mask off undefined bits */ \
106721: ldxa [%g2] ASI_IC_TAG, %g7; \
1068 andn %g7, 0xff, %g7; \
1069 cmp %g3, %g7; \
1070 bne,pt %xcc, 23f; \
1071 nop; \
1072 /* Yep, what we want, capture state. */ \
1073 stx %g2, [%g1 + 0x40]; \
1074 stx %g7, [%g1 + 0x48]; \
1075 add %g2, (1 << 3), %g2; \
1076 ldxa [%g2] ASI_IC_TAG, %g7; \
1077 add %g2, (1 << 3), %g2; \
1078 stx %g7, [%g1 + 0x50]; \
1079 ldxa [%g2] ASI_IC_TAG, %g7; \
1080 add %g2, (1 << 3), %g2; \
1081 stx %g7, [%g1 + 0x60]; \
1082 ldxa [%g2] ASI_IC_TAG, %g7; \
1083 stx %g7, [%g1 + 0x68]; \
1084 sub %g2, (3 << 3), %g2; \
1085 ldxa [%g2] ASI_IC_STAG, %g7; \
1086 stx %g7, [%g1 + 0x58]; \
1087 clr %g3; \
1088 srlx %g2, 2, %g2; \
108922: ldxa [%g2 + %g3] ASI_IC_INSTR, %g7; \
1090 stx %g7, [%g1]; \
1091 add %g3, (1 << 3), %g3; \
1092 cmp %g3, (8 << 3); \
1093 bl,pt %xcc, 22b; \
1094 add %g1, 0x8, %g1; \
1095 ba,pt %xcc, 30f; \
1096 add %g1, 0x30, %g1; \
109723: sethi %hi(1 << 14), %g7; \
1098 add %g2, %g7, %g2; \
1099 srlx %g2, 14, %g7; \
1100 cmp %g7, 4; \
1101 bl,pt %xcc, 21b; \
1102 nop; \
1103 add %g1, 0x70, %g1; \
110430: /* %g1 now points to E-cache logging area */ \
1105 andn %g5, (32 - 1), %g2; /* E-cache subblock */ \
1106 stx %g2, [%g1 + 0x20]; \
1107 ldxa [%g2] ASI_EC_TAG_DATA, %g7; \
1108 stx %g7, [%g1 + 0x28]; \
1109 ldxa [%g2] ASI_EC_R, %g0; \
1110 clr %g3; \
111131: ldxa [%g3] ASI_EC_DATA, %g7; \
1112 stx %g7, [%g1 + %g3]; \
1113 add %g3, 0x8, %g3; \
1114 cmp %g3, 0x20; \
1115 bl,pt %xcc, 31b; \
1116 nop; \
111780: /* DONE */
1118
1119 /* These get patched into the trap table at boot time
1120 * once we know we have a cheetah processor.
1121 */
1122 .globl cheetah_fecc_trap_vector, cheetah_fecc_trap_vector_tl1
1123cheetah_fecc_trap_vector:
1124 membar #Sync
1125 ldxa [%g0] ASI_DCU_CONTROL_REG, %g1
1126 andn %g1, DCU_DC | DCU_IC, %g1
1127 stxa %g1, [%g0] ASI_DCU_CONTROL_REG
1128 membar #Sync
1129 sethi %hi(cheetah_fast_ecc), %g2
1130 jmpl %g2 + %lo(cheetah_fast_ecc), %g0
1131 mov 0, %g1
1132cheetah_fecc_trap_vector_tl1:
1133 membar #Sync
1134 ldxa [%g0] ASI_DCU_CONTROL_REG, %g1
1135 andn %g1, DCU_DC | DCU_IC, %g1
1136 stxa %g1, [%g0] ASI_DCU_CONTROL_REG
1137 membar #Sync
1138 sethi %hi(cheetah_fast_ecc), %g2
1139 jmpl %g2 + %lo(cheetah_fast_ecc), %g0
1140 mov 1, %g1
1141 .globl cheetah_cee_trap_vector, cheetah_cee_trap_vector_tl1
1142cheetah_cee_trap_vector:
1143 membar #Sync
1144 ldxa [%g0] ASI_DCU_CONTROL_REG, %g1
1145 andn %g1, DCU_IC, %g1
1146 stxa %g1, [%g0] ASI_DCU_CONTROL_REG
1147 membar #Sync
1148 sethi %hi(cheetah_cee), %g2
1149 jmpl %g2 + %lo(cheetah_cee), %g0
1150 mov 0, %g1
1151cheetah_cee_trap_vector_tl1:
1152 membar #Sync
1153 ldxa [%g0] ASI_DCU_CONTROL_REG, %g1
1154 andn %g1, DCU_IC, %g1
1155 stxa %g1, [%g0] ASI_DCU_CONTROL_REG
1156 membar #Sync
1157 sethi %hi(cheetah_cee), %g2
1158 jmpl %g2 + %lo(cheetah_cee), %g0
1159 mov 1, %g1
1160 .globl cheetah_deferred_trap_vector, cheetah_deferred_trap_vector_tl1
1161cheetah_deferred_trap_vector:
1162 membar #Sync
1163 ldxa [%g0] ASI_DCU_CONTROL_REG, %g1;
1164 andn %g1, DCU_DC | DCU_IC, %g1;
1165 stxa %g1, [%g0] ASI_DCU_CONTROL_REG;
1166 membar #Sync;
1167 sethi %hi(cheetah_deferred_trap), %g2
1168 jmpl %g2 + %lo(cheetah_deferred_trap), %g0
1169 mov 0, %g1
1170cheetah_deferred_trap_vector_tl1:
1171 membar #Sync;
1172 ldxa [%g0] ASI_DCU_CONTROL_REG, %g1;
1173 andn %g1, DCU_DC | DCU_IC, %g1;
1174 stxa %g1, [%g0] ASI_DCU_CONTROL_REG;
1175 membar #Sync;
1176 sethi %hi(cheetah_deferred_trap), %g2
1177 jmpl %g2 + %lo(cheetah_deferred_trap), %g0
1178 mov 1, %g1
1179
1180 /* Cheetah+ specific traps. These are for the new I/D cache parity
1181 * error traps. The first argument to cheetah_plus_parity_handler
1182 * is encoded as follows:
1183 *
1184 * Bit0: 0=dcache,1=icache
1185 * Bit1: 0=recoverable,1=unrecoverable
1186 */
1187 .globl cheetah_plus_dcpe_trap_vector, cheetah_plus_dcpe_trap_vector_tl1
1188cheetah_plus_dcpe_trap_vector:
1189 membar #Sync
1190 sethi %hi(do_cheetah_plus_data_parity), %g7
1191 jmpl %g7 + %lo(do_cheetah_plus_data_parity), %g0
1192 nop
1193 nop
1194 nop
1195 nop
1196 nop
1197
1198do_cheetah_plus_data_parity:
1199 ba,pt %xcc, etrap
1200 rd %pc, %g7
1201 mov 0x0, %o0
1202 call cheetah_plus_parity_error
1203 add %sp, PTREGS_OFF, %o1
1204 ba,pt %xcc, rtrap
1205 clr %l6
1206
1207cheetah_plus_dcpe_trap_vector_tl1:
1208 membar #Sync
1209 wrpr PSTATE_IG | PSTATE_PEF | PSTATE_PRIV, %pstate
1210 sethi %hi(do_dcpe_tl1), %g3
1211 jmpl %g3 + %lo(do_dcpe_tl1), %g0
1212 nop
1213 nop
1214 nop
1215 nop
1216
1217 .globl cheetah_plus_icpe_trap_vector, cheetah_plus_icpe_trap_vector_tl1
1218cheetah_plus_icpe_trap_vector:
1219 membar #Sync
1220 sethi %hi(do_cheetah_plus_insn_parity), %g7
1221 jmpl %g7 + %lo(do_cheetah_plus_insn_parity), %g0
1222 nop
1223 nop
1224 nop
1225 nop
1226 nop
1227
1228do_cheetah_plus_insn_parity:
1229 ba,pt %xcc, etrap
1230 rd %pc, %g7
1231 mov 0x1, %o0
1232 call cheetah_plus_parity_error
1233 add %sp, PTREGS_OFF, %o1
1234 ba,pt %xcc, rtrap
1235 clr %l6
1236
1237cheetah_plus_icpe_trap_vector_tl1:
1238 membar #Sync
1239 wrpr PSTATE_IG | PSTATE_PEF | PSTATE_PRIV, %pstate
1240 sethi %hi(do_icpe_tl1), %g3
1241 jmpl %g3 + %lo(do_icpe_tl1), %g0
1242 nop
1243 nop
1244 nop
1245 nop
1246
1247 /* If we take one of these traps when tl >= 1, then we
1248 * jump to interrupt globals. If some trap level above us
1249 * was also using interrupt globals, we cannot recover.
1250 * We may use all interrupt global registers except %g6.
1251 */
1252 .globl do_dcpe_tl1, do_icpe_tl1
1253do_dcpe_tl1:
1254 rdpr %tl, %g1 ! Save original trap level
1255 mov 1, %g2 ! Setup TSTATE checking loop
1256 sethi %hi(TSTATE_IG), %g3 ! TSTATE mask bit
12571: wrpr %g2, %tl ! Set trap level to check
1258 rdpr %tstate, %g4 ! Read TSTATE for this level
1259 andcc %g4, %g3, %g0 ! Interrupt globals in use?
1260 bne,a,pn %xcc, do_dcpe_tl1_fatal ! Yep, irrecoverable
1261 wrpr %g1, %tl ! Restore original trap level
1262 add %g2, 1, %g2 ! Next trap level
1263 cmp %g2, %g1 ! Hit them all yet?
1264 ble,pt %icc, 1b ! Not yet
1265 nop
1266 wrpr %g1, %tl ! Restore original trap level
1267do_dcpe_tl1_nonfatal: /* Ok we may use interrupt globals safely. */
1268 /* Reset D-cache parity */
1269 sethi %hi(1 << 16), %g1 ! D-cache size
1270 mov (1 << 5), %g2 ! D-cache line size
1271 sub %g1, %g2, %g1 ! Move down 1 cacheline
12721: srl %g1, 14, %g3 ! Compute UTAG
1273 membar #Sync
1274 stxa %g3, [%g1] ASI_DCACHE_UTAG
1275 membar #Sync
1276 sub %g2, 8, %g3 ! 64-bit data word within line
12772: membar #Sync
1278 stxa %g0, [%g1 + %g3] ASI_DCACHE_DATA
1279 membar #Sync
1280 subcc %g3, 8, %g3 ! Next 64-bit data word
1281 bge,pt %icc, 2b
1282 nop
1283 subcc %g1, %g2, %g1 ! Next cacheline
1284 bge,pt %icc, 1b
1285 nop
1286 ba,pt %xcc, dcpe_icpe_tl1_common
1287 nop
1288
1289do_dcpe_tl1_fatal:
1290 sethi %hi(1f), %g7
1291 ba,pt %xcc, etraptl1
12921: or %g7, %lo(1b), %g7
1293 mov 0x2, %o0
1294 call cheetah_plus_parity_error
1295 add %sp, PTREGS_OFF, %o1
1296 ba,pt %xcc, rtrap
1297 clr %l6
1298
1299do_icpe_tl1:
1300 rdpr %tl, %g1 ! Save original trap level
1301 mov 1, %g2 ! Setup TSTATE checking loop
1302 sethi %hi(TSTATE_IG), %g3 ! TSTATE mask bit
13031: wrpr %g2, %tl ! Set trap level to check
1304 rdpr %tstate, %g4 ! Read TSTATE for this level
1305 andcc %g4, %g3, %g0 ! Interrupt globals in use?
1306 bne,a,pn %xcc, do_icpe_tl1_fatal ! Yep, irrecoverable
1307 wrpr %g1, %tl ! Restore original trap level
1308 add %g2, 1, %g2 ! Next trap level
1309 cmp %g2, %g1 ! Hit them all yet?
1310 ble,pt %icc, 1b ! Not yet
1311 nop
1312 wrpr %g1, %tl ! Restore original trap level
1313do_icpe_tl1_nonfatal: /* Ok we may use interrupt globals safely. */
1314 /* Flush I-cache */
1315 sethi %hi(1 << 15), %g1 ! I-cache size
1316 mov (1 << 5), %g2 ! I-cache line size
1317 sub %g1, %g2, %g1
13181: or %g1, (2 << 3), %g3
1319 stxa %g0, [%g3] ASI_IC_TAG
1320 membar #Sync
1321 subcc %g1, %g2, %g1
1322 bge,pt %icc, 1b
1323 nop
1324 ba,pt %xcc, dcpe_icpe_tl1_common
1325 nop
1326
1327do_icpe_tl1_fatal:
1328 sethi %hi(1f), %g7
1329 ba,pt %xcc, etraptl1
13301: or %g7, %lo(1b), %g7
1331 mov 0x3, %o0
1332 call cheetah_plus_parity_error
1333 add %sp, PTREGS_OFF, %o1
1334 ba,pt %xcc, rtrap
1335 clr %l6
1336
1337dcpe_icpe_tl1_common:
1338 /* Flush D-cache, re-enable D/I caches in DCU and finally
1339 * retry the trapping instruction.
1340 */
1341 sethi %hi(1 << 16), %g1 ! D-cache size
1342 mov (1 << 5), %g2 ! D-cache line size
1343 sub %g1, %g2, %g1
13441: stxa %g0, [%g1] ASI_DCACHE_TAG
1345 membar #Sync
1346 subcc %g1, %g2, %g1
1347 bge,pt %icc, 1b
1348 nop
1349 ldxa [%g0] ASI_DCU_CONTROL_REG, %g1
1350 or %g1, (DCU_DC | DCU_IC), %g1
1351 stxa %g1, [%g0] ASI_DCU_CONTROL_REG
1352 membar #Sync
1353 retry
1354
1355 /* Cheetah FECC trap handling, we get here from tl{0,1}_fecc
1356 * in the trap table. That code has done a memory barrier
1357 * and has disabled both the I-cache and D-cache in the DCU
1358 * control register. The I-cache is disabled so that we may
1359 * capture the corrupted cache line, and the D-cache is disabled
1360 * because corrupt data may have been placed there and we don't
1361 * want to reference it.
1362 *
1363 * %g1 is one if this trap occurred at %tl >= 1.
1364 *
1365 * Next, we turn off error reporting so that we don't recurse.
1366 */
1367 .globl cheetah_fast_ecc
1368cheetah_fast_ecc:
1369 ldxa [%g0] ASI_ESTATE_ERROR_EN, %g2
1370 andn %g2, ESTATE_ERROR_NCEEN | ESTATE_ERROR_CEEN, %g2
1371 stxa %g2, [%g0] ASI_ESTATE_ERROR_EN
1372 membar #Sync
1373
1374 /* Fetch and clear AFSR/AFAR */
1375 ldxa [%g0] ASI_AFSR, %g4
1376 ldxa [%g0] ASI_AFAR, %g5
1377 stxa %g4, [%g0] ASI_AFSR
1378 membar #Sync
1379
1380 CHEETAH_LOG_ERROR
1381
1382 rdpr %pil, %g2
1383 wrpr %g0, 15, %pil
1384 ba,pt %xcc, etrap_irq
1385 rd %pc, %g7
1386 mov %l4, %o1
1387 mov %l5, %o2
1388 call cheetah_fecc_handler
1389 add %sp, PTREGS_OFF, %o0
1390 ba,a,pt %xcc, rtrap_irq
1391
1392 /* Our caller has disabled I-cache and performed membar Sync. */
1393 .globl cheetah_cee
1394cheetah_cee:
1395 ldxa [%g0] ASI_ESTATE_ERROR_EN, %g2
1396 andn %g2, ESTATE_ERROR_CEEN, %g2
1397 stxa %g2, [%g0] ASI_ESTATE_ERROR_EN
1398 membar #Sync
1399
1400 /* Fetch and clear AFSR/AFAR */
1401 ldxa [%g0] ASI_AFSR, %g4
1402 ldxa [%g0] ASI_AFAR, %g5
1403 stxa %g4, [%g0] ASI_AFSR
1404 membar #Sync
1405
1406 CHEETAH_LOG_ERROR
1407
1408 rdpr %pil, %g2
1409 wrpr %g0, 15, %pil
1410 ba,pt %xcc, etrap_irq
1411 rd %pc, %g7
1412 mov %l4, %o1
1413 mov %l5, %o2
1414 call cheetah_cee_handler
1415 add %sp, PTREGS_OFF, %o0
1416 ba,a,pt %xcc, rtrap_irq
1417
1418 /* Our caller has disabled I-cache+D-cache and performed membar Sync. */
1419 .globl cheetah_deferred_trap
1420cheetah_deferred_trap:
1421 ldxa [%g0] ASI_ESTATE_ERROR_EN, %g2
1422 andn %g2, ESTATE_ERROR_NCEEN | ESTATE_ERROR_CEEN, %g2
1423 stxa %g2, [%g0] ASI_ESTATE_ERROR_EN
1424 membar #Sync
1425
1426 /* Fetch and clear AFSR/AFAR */
1427 ldxa [%g0] ASI_AFSR, %g4
1428 ldxa [%g0] ASI_AFAR, %g5
1429 stxa %g4, [%g0] ASI_AFSR
1430 membar #Sync
1431
1432 CHEETAH_LOG_ERROR
1433
1434 rdpr %pil, %g2
1435 wrpr %g0, 15, %pil
1436 ba,pt %xcc, etrap_irq
1437 rd %pc, %g7
1438 mov %l4, %o1
1439 mov %l5, %o2
1440 call cheetah_deferred_handler
1441 add %sp, PTREGS_OFF, %o0
1442 ba,a,pt %xcc, rtrap_irq
1443
1444 .globl __do_privact
1445__do_privact:
1446 mov TLB_SFSR, %g3
1447 stxa %g0, [%g3] ASI_DMMU ! Clear FaultValid bit
1448 membar #Sync
1449 sethi %hi(109f), %g7
1450 ba,pt %xcc, etrap
1451109: or %g7, %lo(109b), %g7
1452 call do_privact
1453 add %sp, PTREGS_OFF, %o0
1454 ba,pt %xcc, rtrap
1455 clr %l6
1456
1457 .globl do_mna
1458do_mna:
1459 rdpr %tl, %g3
1460 cmp %g3, 1
1461
1462 /* Setup %g4/%g5 now as they are used in the
1463 * winfixup code.
1464 */
1465 mov TLB_SFSR, %g3
1466 mov DMMU_SFAR, %g4
1467 ldxa [%g4] ASI_DMMU, %g4
1468 ldxa [%g3] ASI_DMMU, %g5
1469 stxa %g0, [%g3] ASI_DMMU ! Clear FaultValid bit
1470 membar #Sync
1471 bgu,pn %icc, winfix_mna
1472 rdpr %tpc, %g3
1473
14741: sethi %hi(109f), %g7
1475 ba,pt %xcc, etrap
1476109: or %g7, %lo(109b), %g7
1477 mov %l4, %o1
1478 mov %l5, %o2
1479 call mem_address_unaligned
1480 add %sp, PTREGS_OFF, %o0
1481 ba,pt %xcc, rtrap
1482 clr %l6
1483
1484 .globl do_lddfmna
1485do_lddfmna:
1486 sethi %hi(109f), %g7
1487 mov TLB_SFSR, %g4
1488 ldxa [%g4] ASI_DMMU, %g5
1489 stxa %g0, [%g4] ASI_DMMU ! Clear FaultValid bit
1490 membar #Sync
1491 mov DMMU_SFAR, %g4
1492 ldxa [%g4] ASI_DMMU, %g4
1493 ba,pt %xcc, etrap
1494109: or %g7, %lo(109b), %g7
1495 mov %l4, %o1
1496 mov %l5, %o2
1497 call handle_lddfmna
1498 add %sp, PTREGS_OFF, %o0
1499 ba,pt %xcc, rtrap
1500 clr %l6
1501
1502 .globl do_stdfmna
1503do_stdfmna:
1504 sethi %hi(109f), %g7
1505 mov TLB_SFSR, %g4
1506 ldxa [%g4] ASI_DMMU, %g5
1507 stxa %g0, [%g4] ASI_DMMU ! Clear FaultValid bit
1508 membar #Sync
1509 mov DMMU_SFAR, %g4
1510 ldxa [%g4] ASI_DMMU, %g4
1511 ba,pt %xcc, etrap
1512109: or %g7, %lo(109b), %g7
1513 mov %l4, %o1
1514 mov %l5, %o2
1515 call handle_stdfmna
1516 add %sp, PTREGS_OFF, %o0
1517 ba,pt %xcc, rtrap
1518 clr %l6
1519
1520 .globl breakpoint_trap
1521breakpoint_trap:
1522 call sparc_breakpoint
1523 add %sp, PTREGS_OFF, %o0
1524 ba,pt %xcc, rtrap
1525 nop
1526
1527#if defined(CONFIG_SUNOS_EMUL) || defined(CONFIG_SOLARIS_EMUL) || \
1528 defined(CONFIG_SOLARIS_EMUL_MODULE)
1529 /* SunOS uses syscall zero as the 'indirect syscall' it looks
1530 * like indir_syscall(scall_num, arg0, arg1, arg2...); etc.
1531 * This is complete brain damage.
1532 */
1533 .globl sunos_indir
1534sunos_indir:
1535 srl %o0, 0, %o0
1536 mov %o7, %l4
1537 cmp %o0, NR_SYSCALLS
1538 blu,a,pt %icc, 1f
1539 sll %o0, 0x2, %o0
1540 sethi %hi(sunos_nosys), %l6
1541 b,pt %xcc, 2f
1542 or %l6, %lo(sunos_nosys), %l6
15431: sethi %hi(sunos_sys_table), %l7
1544 or %l7, %lo(sunos_sys_table), %l7
1545 lduw [%l7 + %o0], %l6
15462: mov %o1, %o0
1547 mov %o2, %o1
1548 mov %o3, %o2
1549 mov %o4, %o3
1550 mov %o5, %o4
1551 call %l6
1552 mov %l4, %o7
1553
1554 .globl sunos_getpid
1555sunos_getpid:
1556 call sys_getppid
1557 nop
1558 call sys_getpid
1559 stx %o0, [%sp + PTREGS_OFF + PT_V9_I1]
1560 b,pt %xcc, ret_sys_call
1561 stx %o0, [%sp + PTREGS_OFF + PT_V9_I0]
1562
1563 /* SunOS getuid() returns uid in %o0 and euid in %o1 */
1564 .globl sunos_getuid
1565sunos_getuid:
1566 call sys32_geteuid16
1567 nop
1568 call sys32_getuid16
1569 stx %o0, [%sp + PTREGS_OFF + PT_V9_I1]
1570 b,pt %xcc, ret_sys_call
1571 stx %o0, [%sp + PTREGS_OFF + PT_V9_I0]
1572
1573 /* SunOS getgid() returns gid in %o0 and egid in %o1 */
1574 .globl sunos_getgid
1575sunos_getgid:
1576 call sys32_getegid16
1577 nop
1578 call sys32_getgid16
1579 stx %o0, [%sp + PTREGS_OFF + PT_V9_I1]
1580 b,pt %xcc, ret_sys_call
1581 stx %o0, [%sp + PTREGS_OFF + PT_V9_I0]
1582#endif
1583
1584 /* SunOS's execv() call only specifies the argv argument, the
1585 * environment settings are the same as the calling processes.
1586 */
1587 .globl sunos_execv
1588sys_execve:
1589 sethi %hi(sparc_execve), %g1
1590 ba,pt %xcc, execve_merge
1591 or %g1, %lo(sparc_execve), %g1
1592#ifdef CONFIG_COMPAT
1593 .globl sys_execve
1594sunos_execv:
1595 stx %g0, [%sp + PTREGS_OFF + PT_V9_I2]
1596 .globl sys32_execve
1597sys32_execve:
1598 sethi %hi(sparc32_execve), %g1
1599 or %g1, %lo(sparc32_execve), %g1
1600#endif
1601execve_merge:
1602 flushw
1603 jmpl %g1, %g0
1604 add %sp, PTREGS_OFF, %o0
1605
1606 .globl sys_pipe, sys_sigpause, sys_nis_syscall
1607 .globl sys_sigsuspend, sys_rt_sigsuspend
1608 .globl sys_rt_sigreturn
1609 .globl sys_ptrace
1610 .globl sys_sigaltstack
1611 .align 32
1612sys_pipe: ba,pt %xcc, sparc_pipe
1613 add %sp, PTREGS_OFF, %o0
1614sys_nis_syscall:ba,pt %xcc, c_sys_nis_syscall
1615 add %sp, PTREGS_OFF, %o0
1616sys_memory_ordering:
1617 ba,pt %xcc, sparc_memory_ordering
1618 add %sp, PTREGS_OFF, %o1
1619sys_sigaltstack:ba,pt %xcc, do_sigaltstack
1620 add %i6, STACK_BIAS, %o2
1621#ifdef CONFIG_COMPAT
1622 .globl sys32_sigstack
1623sys32_sigstack: ba,pt %xcc, do_sys32_sigstack
1624 mov %i6, %o2
1625 .globl sys32_sigaltstack
1626sys32_sigaltstack:
1627 ba,pt %xcc, do_sys32_sigaltstack
1628 mov %i6, %o2
1629#endif
1630 .align 32
1631sys_sigsuspend: add %sp, PTREGS_OFF, %o0
1632 call do_sigsuspend
1633 add %o7, 1f-.-4, %o7
1634 nop
1635sys_rt_sigsuspend: /* NOTE: %o0,%o1 have a correct value already */
1636 add %sp, PTREGS_OFF, %o2
1637 call do_rt_sigsuspend
1638 add %o7, 1f-.-4, %o7
1639 nop
1640#ifdef CONFIG_COMPAT
1641 .globl sys32_rt_sigsuspend
1642sys32_rt_sigsuspend: /* NOTE: %o0,%o1 have a correct value already */
1643 srl %o0, 0, %o0
1644 add %sp, PTREGS_OFF, %o2
1645 call do_rt_sigsuspend32
1646 add %o7, 1f-.-4, %o7
1647#endif
1648 /* NOTE: %o0 has a correct value already */
1649sys_sigpause: add %sp, PTREGS_OFF, %o1
1650 call do_sigpause
1651 add %o7, 1f-.-4, %o7
1652 nop
1653#ifdef CONFIG_COMPAT
1654 .globl sys32_sigreturn
1655sys32_sigreturn:
1656 add %sp, PTREGS_OFF, %o0
1657 call do_sigreturn32
1658 add %o7, 1f-.-4, %o7
1659 nop
1660#endif
1661sys_rt_sigreturn:
1662 add %sp, PTREGS_OFF, %o0
1663 call do_rt_sigreturn
1664 add %o7, 1f-.-4, %o7
1665 nop
1666#ifdef CONFIG_COMPAT
1667 .globl sys32_rt_sigreturn
1668sys32_rt_sigreturn:
1669 add %sp, PTREGS_OFF, %o0
1670 call do_rt_sigreturn32
1671 add %o7, 1f-.-4, %o7
1672 nop
1673#endif
1674sys_ptrace: add %sp, PTREGS_OFF, %o0
1675 call do_ptrace
1676 add %o7, 1f-.-4, %o7
1677 nop
1678 .align 32
16791: ldx [%curptr + TI_FLAGS], %l5
1680 andcc %l5, _TIF_SYSCALL_TRACE, %g0
1681 be,pt %icc, rtrap
1682 clr %l6
1683 call syscall_trace
1684 nop
1685
1686 ba,pt %xcc, rtrap
1687 clr %l6
1688
1689 /* This is how fork() was meant to be done, 8 instruction entry.
1690 *
1691 * I questioned the following code briefly, let me clear things
1692 * up so you must not reason on it like I did.
1693 *
1694 * Know the fork_kpsr etc. we use in the sparc32 port? We don't
1695 * need it here because the only piece of window state we copy to
1696 * the child is the CWP register. Even if the parent sleeps,
1697 * we are safe because we stuck it into pt_regs of the parent
1698 * so it will not change.
1699 *
1700 * XXX This raises the question, whether we can do the same on
1701 * XXX sparc32 to get rid of fork_kpsr _and_ fork_kwim. The
1702 * XXX answer is yes. We stick fork_kpsr in UREG_G0 and
1703 * XXX fork_kwim in UREG_G1 (global registers are considered
1704 * XXX volatile across a system call in the sparc ABI I think
1705 * XXX if it isn't we can use regs->y instead, anyone who depends
1706 * XXX upon the Y register being preserved across a fork deserves
1707 * XXX to lose).
1708 *
1709 * In fact we should take advantage of that fact for other things
1710 * during system calls...
1711 */
1712 .globl sys_fork, sys_vfork, sys_clone, sparc_exit
1713 .globl ret_from_syscall
1714 .align 32
1715sys_vfork: /* Under Linux, vfork and fork are just special cases of clone. */
1716 sethi %hi(0x4000 | 0x0100 | SIGCHLD), %o0
1717 or %o0, %lo(0x4000 | 0x0100 | SIGCHLD), %o0
1718 ba,pt %xcc, sys_clone
1719sys_fork: clr %o1
1720 mov SIGCHLD, %o0
1721sys_clone: flushw
1722 movrz %o1, %fp, %o1
1723 mov 0, %o3
1724 ba,pt %xcc, sparc_do_fork
1725 add %sp, PTREGS_OFF, %o2
1726ret_from_syscall:
1727 /* Clear SPARC_FLAG_NEWCHILD, switch_to leaves thread.flags in
1728 * %o7 for us. Check performance counter stuff too.
1729 */
1730 andn %o7, _TIF_NEWCHILD, %l0
1731 stx %l0, [%g6 + TI_FLAGS]
1732 call schedule_tail
1733 mov %g7, %o0
1734 andcc %l0, _TIF_PERFCTR, %g0
1735 be,pt %icc, 1f
1736 nop
1737 ldx [%g6 + TI_PCR], %o7
1738 wr %g0, %o7, %pcr
1739
1740 /* Blackbird errata workaround. See commentary in
1741 * smp.c:smp_percpu_timer_interrupt() for more
1742 * information.
1743 */
1744 ba,pt %xcc, 99f
1745 nop
1746 .align 64
174799: wr %g0, %g0, %pic
1748 rd %pic, %g0
1749
17501: b,pt %xcc, ret_sys_call
1751 ldx [%sp + PTREGS_OFF + PT_V9_I0], %o0
1752sparc_exit: wrpr %g0, (PSTATE_RMO | PSTATE_PEF | PSTATE_PRIV), %pstate
1753 rdpr %otherwin, %g1
1754 rdpr %cansave, %g3
1755 add %g3, %g1, %g3
1756 wrpr %g3, 0x0, %cansave
1757 wrpr %g0, 0x0, %otherwin
1758 wrpr %g0, (PSTATE_RMO | PSTATE_PEF | PSTATE_PRIV | PSTATE_IE), %pstate
1759 ba,pt %xcc, sys_exit
1760 stb %g0, [%g6 + TI_WSAVED]
1761
1762linux_sparc_ni_syscall:
1763 sethi %hi(sys_ni_syscall), %l7
1764 b,pt %xcc, 4f
1765 or %l7, %lo(sys_ni_syscall), %l7
1766
1767linux_syscall_trace32:
1768 call syscall_trace
1769 nop
1770 srl %i0, 0, %o0
1771 mov %i4, %o4
1772 srl %i1, 0, %o1
1773 srl %i2, 0, %o2
1774 b,pt %xcc, 2f
1775 srl %i3, 0, %o3
1776
1777linux_syscall_trace:
1778 call syscall_trace
1779 nop
1780 mov %i0, %o0
1781 mov %i1, %o1
1782 mov %i2, %o2
1783 mov %i3, %o3
1784 b,pt %xcc, 2f
1785 mov %i4, %o4
1786
1787
1788 /* Linux 32-bit and SunOS system calls enter here... */
1789 .align 32
1790 .globl linux_sparc_syscall32
1791linux_sparc_syscall32:
1792 /* Direct access to user regs, much faster. */
1793 cmp %g1, NR_SYSCALLS ! IEU1 Group
1794 bgeu,pn %xcc, linux_sparc_ni_syscall ! CTI
1795 srl %i0, 0, %o0 ! IEU0
1796 sll %g1, 2, %l4 ! IEU0 Group
1797#ifdef SYSCALL_TRACING
1798 call syscall_trace_entry
1799 add %sp, PTREGS_OFF, %o0
1800 srl %i0, 0, %o0
1801#endif
1802 srl %i4, 0, %o4 ! IEU1
1803 lduw [%l7 + %l4], %l7 ! Load
1804 srl %i1, 0, %o1 ! IEU0 Group
1805 ldx [%curptr + TI_FLAGS], %l0 ! Load
1806
1807 srl %i5, 0, %o5 ! IEU1
1808 srl %i2, 0, %o2 ! IEU0 Group
1809 andcc %l0, _TIF_SYSCALL_TRACE, %g0 ! IEU0 Group
1810 bne,pn %icc, linux_syscall_trace32 ! CTI
1811 mov %i0, %l5 ! IEU1
1812 call %l7 ! CTI Group brk forced
1813 srl %i3, 0, %o3 ! IEU0
1814 ba,a,pt %xcc, 3f
1815
1816 /* Linux native and SunOS system calls enter here... */
1817 .align 32
1818 .globl linux_sparc_syscall, ret_sys_call
1819linux_sparc_syscall:
1820 /* Direct access to user regs, much faster. */
1821 cmp %g1, NR_SYSCALLS ! IEU1 Group
1822 bgeu,pn %xcc, linux_sparc_ni_syscall ! CTI
1823 mov %i0, %o0 ! IEU0
1824 sll %g1, 2, %l4 ! IEU0 Group
1825#ifdef SYSCALL_TRACING
1826 call syscall_trace_entry
1827 add %sp, PTREGS_OFF, %o0
1828 mov %i0, %o0
1829#endif
1830 mov %i1, %o1 ! IEU1
1831 lduw [%l7 + %l4], %l7 ! Load
18324: mov %i2, %o2 ! IEU0 Group
1833 ldx [%curptr + TI_FLAGS], %l0 ! Load
1834
1835 mov %i3, %o3 ! IEU1
1836 mov %i4, %o4 ! IEU0 Group
1837 andcc %l0, _TIF_SYSCALL_TRACE, %g0 ! IEU1 Group+1 bubble
1838 bne,pn %icc, linux_syscall_trace ! CTI Group
1839 mov %i0, %l5 ! IEU0
18402: call %l7 ! CTI Group brk forced
1841 mov %i5, %o5 ! IEU0
1842 nop
1843
18443: stx %o0, [%sp + PTREGS_OFF + PT_V9_I0]
1845ret_sys_call:
1846#ifdef SYSCALL_TRACING
1847 mov %o0, %o1
1848 call syscall_trace_exit
1849 add %sp, PTREGS_OFF, %o0
1850 mov %o1, %o0
1851#endif
1852 ldx [%sp + PTREGS_OFF + PT_V9_TSTATE], %g3
1853 ldx [%sp + PTREGS_OFF + PT_V9_TNPC], %l1 ! pc = npc
1854 sra %o0, 0, %o0
1855 mov %ulo(TSTATE_XCARRY | TSTATE_ICARRY), %g2
1856 sllx %g2, 32, %g2
1857
1858 /* Check if force_successful_syscall_return()
1859 * was invoked.
1860 */
1861 ldx [%curptr + TI_FLAGS], %l0
1862 andcc %l0, _TIF_SYSCALL_SUCCESS, %g0
1863 be,pt %icc, 1f
1864 andn %l0, _TIF_SYSCALL_SUCCESS, %l0
1865 ba,pt %xcc, 80f
1866 stx %l0, [%curptr + TI_FLAGS]
1867
18681:
1869 cmp %o0, -ERESTART_RESTARTBLOCK
1870 bgeu,pn %xcc, 1f
1871 andcc %l0, _TIF_SYSCALL_TRACE, %l6
187280:
1873 /* System call success, clear Carry condition code. */
1874 andn %g3, %g2, %g3
1875 stx %g3, [%sp + PTREGS_OFF + PT_V9_TSTATE]
1876 bne,pn %icc, linux_syscall_trace2
1877 add %l1, 0x4, %l2 ! npc = npc+4
1878 stx %l1, [%sp + PTREGS_OFF + PT_V9_TPC]
1879 ba,pt %xcc, rtrap_clr_l6
1880 stx %l2, [%sp + PTREGS_OFF + PT_V9_TNPC]
1881
18821:
1883 /* System call failure, set Carry condition code.
1884 * Also, get abs(errno) to return to the process.
1885 */
1886 andcc %l0, _TIF_SYSCALL_TRACE, %l6
1887 sub %g0, %o0, %o0
1888 or %g3, %g2, %g3
1889 stx %o0, [%sp + PTREGS_OFF + PT_V9_I0]
1890 mov 1, %l6
1891 stx %g3, [%sp + PTREGS_OFF + PT_V9_TSTATE]
1892 bne,pn %icc, linux_syscall_trace2
1893 add %l1, 0x4, %l2 ! npc = npc+4
1894 stx %l1, [%sp + PTREGS_OFF + PT_V9_TPC]
1895
1896 b,pt %xcc, rtrap
1897 stx %l2, [%sp + PTREGS_OFF + PT_V9_TNPC]
1898linux_syscall_trace2:
1899 call syscall_trace
1900 nop
1901 stx %l1, [%sp + PTREGS_OFF + PT_V9_TPC]
1902 ba,pt %xcc, rtrap
1903 stx %l2, [%sp + PTREGS_OFF + PT_V9_TNPC]
1904
1905 .align 32
1906 .globl __flushw_user
1907__flushw_user:
1908 rdpr %otherwin, %g1
1909 brz,pn %g1, 2f
1910 clr %g2
19111: save %sp, -128, %sp
1912 rdpr %otherwin, %g1
1913 brnz,pt %g1, 1b
1914 add %g2, 1, %g2
19151: sub %g2, 1, %g2
1916 brnz,pt %g2, 1b
1917 restore %g0, %g0, %g0
19182: retl
1919 nop