blob: 8c244932b1c23ee50e594994cfb056bc4ee64aa4 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* $Id: ultra.S,v 1.72 2002/02/09 19:49:31 davem Exp $
2 * ultra.S: Don't expand these all over the place...
3 *
4 * Copyright (C) 1997, 2000 David S. Miller (davem@redhat.com)
5 */
6
7#include <linux/config.h>
8#include <asm/asi.h>
9#include <asm/pgtable.h>
10#include <asm/page.h>
11#include <asm/spitfire.h>
12#include <asm/mmu_context.h>
David S. Miller2ef27772005-08-30 20:21:34 -070013#include <asm/mmu.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070014#include <asm/pil.h>
15#include <asm/head.h>
16#include <asm/thread_info.h>
17#include <asm/cacheflush.h>
David S. Miller52bf0822006-02-04 03:08:37 -080018#include <asm/hypervisor.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070019
20 /* Basically, most of the Spitfire vs. Cheetah madness
21 * has to do with the fact that Cheetah does not support
22 * IMMU flushes out of the secondary context. Someone needs
23 * to throw a south lake birthday party for the folks
24 * in Microelectronics who refused to fix this shit.
25 */
26
27 /* This file is meant to be read efficiently by the CPU, not humans.
28 * Staraj sie tego nikomu nie pierdolnac...
29 */
30 .text
31 .align 32
32 .globl __flush_tlb_mm
David S. Miller52bf0822006-02-04 03:08:37 -080033__flush_tlb_mm: /* 18 insns */
34 /* %o0=(ctx & TAG_CONTEXT_BITS), %o1=SECONDARY_CONTEXT */
Linus Torvalds1da177e2005-04-16 15:20:36 -070035 ldxa [%o1] ASI_DMMU, %g2
36 cmp %g2, %o0
37 bne,pn %icc, __spitfire_flush_tlb_mm_slow
38 mov 0x50, %g3
39 stxa %g0, [%g3] ASI_DMMU_DEMAP
40 stxa %g0, [%g3] ASI_IMMU_DEMAP
David S. Miller4da808c2006-01-31 18:33:00 -080041 sethi %hi(KERNBASE), %g3
42 flush %g3
Linus Torvalds1da177e2005-04-16 15:20:36 -070043 retl
David S. Miller4da808c2006-01-31 18:33:00 -080044 nop
Linus Torvalds1da177e2005-04-16 15:20:36 -070045 nop
46 nop
47 nop
48 nop
49 nop
50 nop
51 nop
David S. Miller2ef27772005-08-30 20:21:34 -070052 nop
53 nop
Linus Torvalds1da177e2005-04-16 15:20:36 -070054
55 .align 32
56 .globl __flush_tlb_pending
David S. Miller52bf0822006-02-04 03:08:37 -080057__flush_tlb_pending: /* 26 insns */
Linus Torvalds1da177e2005-04-16 15:20:36 -070058 /* %o0 = context, %o1 = nr, %o2 = vaddrs[] */
59 rdpr %pstate, %g7
60 sllx %o1, 3, %o1
61 andn %g7, PSTATE_IE, %g2
62 wrpr %g2, %pstate
63 mov SECONDARY_CONTEXT, %o4
64 ldxa [%o4] ASI_DMMU, %g2
65 stxa %o0, [%o4] ASI_DMMU
661: sub %o1, (1 << 3), %o1
67 ldx [%o2 + %o1], %o3
68 andcc %o3, 1, %g0
69 andn %o3, 1, %o3
70 be,pn %icc, 2f
71 or %o3, 0x10, %o3
72 stxa %g0, [%o3] ASI_IMMU_DEMAP
732: stxa %g0, [%o3] ASI_DMMU_DEMAP
74 membar #Sync
75 brnz,pt %o1, 1b
76 nop
77 stxa %g2, [%o4] ASI_DMMU
David S. Miller4da808c2006-01-31 18:33:00 -080078 sethi %hi(KERNBASE), %o4
79 flush %o4
Linus Torvalds1da177e2005-04-16 15:20:36 -070080 retl
81 wrpr %g7, 0x0, %pstate
David S. Millerfef43da2005-07-05 19:45:24 -070082 nop
David S. Miller2ef27772005-08-30 20:21:34 -070083 nop
84 nop
85 nop
Linus Torvalds1da177e2005-04-16 15:20:36 -070086
87 .align 32
88 .globl __flush_tlb_kernel_range
David S. Miller52bf0822006-02-04 03:08:37 -080089__flush_tlb_kernel_range: /* 14 insns */
90 /* %o0=start, %o1=end */
Linus Torvalds1da177e2005-04-16 15:20:36 -070091 cmp %o0, %o1
92 be,pn %xcc, 2f
93 sethi %hi(PAGE_SIZE), %o4
94 sub %o1, %o0, %o3
95 sub %o3, %o4, %o3
96 or %o0, 0x20, %o0 ! Nucleus
971: stxa %g0, [%o0 + %o3] ASI_DMMU_DEMAP
98 stxa %g0, [%o0 + %o3] ASI_IMMU_DEMAP
99 membar #Sync
100 brnz,pt %o3, 1b
101 sub %o3, %o4, %o3
David S. Miller4da808c2006-01-31 18:33:00 -08001022: sethi %hi(KERNBASE), %o3
103 flush %o3
104 retl
105 nop
David S. Miller52bf0822006-02-04 03:08:37 -0800106 nop
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107
108__spitfire_flush_tlb_mm_slow:
109 rdpr %pstate, %g1
110 wrpr %g1, PSTATE_IE, %pstate
111 stxa %o0, [%o1] ASI_DMMU
112 stxa %g0, [%g3] ASI_DMMU_DEMAP
113 stxa %g0, [%g3] ASI_IMMU_DEMAP
114 flush %g6
115 stxa %g2, [%o1] ASI_DMMU
David S. Miller4da808c2006-01-31 18:33:00 -0800116 sethi %hi(KERNBASE), %o1
117 flush %o1
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118 retl
119 wrpr %g1, 0, %pstate
120
121/*
122 * The following code flushes one page_size worth.
123 */
124#if (PAGE_SHIFT == 13)
125#define ITAG_MASK 0xfe
126#elif (PAGE_SHIFT == 16)
127#define ITAG_MASK 0x7fe
128#else
129#error unsupported PAGE_SIZE
130#endif
Prasanna S Panchamukhi83005162005-09-06 15:19:31 -0700131 .section .kprobes.text, "ax"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132 .align 32
133 .globl __flush_icache_page
134__flush_icache_page: /* %o0 = phys_page */
135 membar #StoreStore
136 srlx %o0, PAGE_SHIFT, %o0
137 sethi %uhi(PAGE_OFFSET), %g1
138 sllx %o0, PAGE_SHIFT, %o0
139 sethi %hi(PAGE_SIZE), %g2
140 sllx %g1, 32, %g1
141 add %o0, %g1, %o0
1421: subcc %g2, 32, %g2
143 bne,pt %icc, 1b
144 flush %o0 + %g2
145 retl
146 nop
147
148#ifdef DCACHE_ALIASING_POSSIBLE
149
150#if (PAGE_SHIFT != 13)
151#error only page shift of 13 is supported by dcache flush
152#endif
153
154#define DTAG_MASK 0x3
155
David S. Millerc5bd50a2005-09-26 16:06:03 -0700156 /* This routine is Spitfire specific so the hardcoded
157 * D-cache size and line-size are OK.
158 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159 .align 64
160 .globl __flush_dcache_page
161__flush_dcache_page: /* %o0=kaddr, %o1=flush_icache */
162 sethi %uhi(PAGE_OFFSET), %g1
163 sllx %g1, 32, %g1
David S. Millerc5bd50a2005-09-26 16:06:03 -0700164 sub %o0, %g1, %o0 ! physical address
165 srlx %o0, 11, %o0 ! make D-cache TAG
166 sethi %hi(1 << 14), %o2 ! D-cache size
167 sub %o2, (1 << 5), %o2 ! D-cache line size
1681: ldxa [%o2] ASI_DCACHE_TAG, %o3 ! load D-cache TAG
169 andcc %o3, DTAG_MASK, %g0 ! Valid?
170 be,pn %xcc, 2f ! Nope, branch
171 andn %o3, DTAG_MASK, %o3 ! Clear valid bits
172 cmp %o3, %o0 ! TAG match?
173 bne,pt %xcc, 2f ! Nope, branch
174 nop
175 stxa %g0, [%o2] ASI_DCACHE_TAG ! Invalidate TAG
176 membar #Sync
1772: brnz,pt %o2, 1b
178 sub %o2, (1 << 5), %o2 ! D-cache line size
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179
180 /* The I-cache does not snoop local stores so we
181 * better flush that too when necessary.
182 */
183 brnz,pt %o1, __flush_icache_page
184 sllx %o0, 11, %o0
185 retl
186 nop
187
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188#endif /* DCACHE_ALIASING_POSSIBLE */
189
David S. Millerc5bd50a2005-09-26 16:06:03 -0700190 .previous
191
David S. Miller2ef27772005-08-30 20:21:34 -0700192 /* Cheetah specific versions, patched at boot time. */
David S. Miller4da808c2006-01-31 18:33:00 -0800193__cheetah_flush_tlb_mm: /* 19 insns */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194 rdpr %pstate, %g7
195 andn %g7, PSTATE_IE, %g2
196 wrpr %g2, 0x0, %pstate
197 wrpr %g0, 1, %tl
198 mov PRIMARY_CONTEXT, %o2
199 mov 0x40, %g3
200 ldxa [%o2] ASI_DMMU, %g2
David S. Miller2ef27772005-08-30 20:21:34 -0700201 srlx %g2, CTX_PGSZ1_NUC_SHIFT, %o1
202 sllx %o1, CTX_PGSZ1_NUC_SHIFT, %o1
203 or %o0, %o1, %o0 /* Preserve nucleus page size fields */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204 stxa %o0, [%o2] ASI_DMMU
205 stxa %g0, [%g3] ASI_DMMU_DEMAP
206 stxa %g0, [%g3] ASI_IMMU_DEMAP
207 stxa %g2, [%o2] ASI_DMMU
David S. Miller4da808c2006-01-31 18:33:00 -0800208 sethi %hi(KERNBASE), %o2
209 flush %o2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210 wrpr %g0, 0, %tl
211 retl
212 wrpr %g7, 0x0, %pstate
213
David S. Miller4da808c2006-01-31 18:33:00 -0800214__cheetah_flush_tlb_pending: /* 27 insns */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215 /* %o0 = context, %o1 = nr, %o2 = vaddrs[] */
216 rdpr %pstate, %g7
217 sllx %o1, 3, %o1
218 andn %g7, PSTATE_IE, %g2
219 wrpr %g2, 0x0, %pstate
220 wrpr %g0, 1, %tl
221 mov PRIMARY_CONTEXT, %o4
222 ldxa [%o4] ASI_DMMU, %g2
David S. Miller2ef27772005-08-30 20:21:34 -0700223 srlx %g2, CTX_PGSZ1_NUC_SHIFT, %o3
224 sllx %o3, CTX_PGSZ1_NUC_SHIFT, %o3
225 or %o0, %o3, %o0 /* Preserve nucleus page size fields */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226 stxa %o0, [%o4] ASI_DMMU
2271: sub %o1, (1 << 3), %o1
228 ldx [%o2 + %o1], %o3
229 andcc %o3, 1, %g0
230 be,pn %icc, 2f
231 andn %o3, 1, %o3
232 stxa %g0, [%o3] ASI_IMMU_DEMAP
2332: stxa %g0, [%o3] ASI_DMMU_DEMAP
David S. Millerb445e262005-06-27 15:42:04 -0700234 membar #Sync
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235 brnz,pt %o1, 1b
David S. Millerb445e262005-06-27 15:42:04 -0700236 nop
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237 stxa %g2, [%o4] ASI_DMMU
David S. Miller4da808c2006-01-31 18:33:00 -0800238 sethi %hi(KERNBASE), %o4
239 flush %o4
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240 wrpr %g0, 0, %tl
241 retl
242 wrpr %g7, 0x0, %pstate
243
244#ifdef DCACHE_ALIASING_POSSIBLE
David S. Millerc5bd50a2005-09-26 16:06:03 -0700245__cheetah_flush_dcache_page: /* 11 insns */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246 sethi %uhi(PAGE_OFFSET), %g1
247 sllx %g1, 32, %g1
248 sub %o0, %g1, %o0
249 sethi %hi(PAGE_SIZE), %o4
2501: subcc %o4, (1 << 5), %o4
251 stxa %g0, [%o0 + %o4] ASI_DCACHE_INVALIDATE
252 membar #Sync
253 bne,pt %icc, 1b
254 nop
255 retl /* I-cache flush never needed on Cheetah, see callers. */
256 nop
257#endif /* DCACHE_ALIASING_POSSIBLE */
258
David S. Miller52bf0822006-02-04 03:08:37 -0800259 /* Hypervisor specific versions, patched at boot time. */
260__hypervisor_flush_tlb_mm: /* 8 insns */
261 mov %o0, %o2 /* ARG2: mmu context */
262 mov 0, %o0 /* ARG0: CPU lists unimplemented */
263 mov 0, %o1 /* ARG1: CPU lists unimplemented */
264 mov HV_MMU_ALL, %o3 /* ARG3: flags */
265 mov HV_FAST_MMU_DEMAP_CTX, %o5
266 ta HV_FAST_TRAP
267 retl
268 nop
269
270__hypervisor_flush_tlb_pending: /* 15 insns */
271 /* %o0 = context, %o1 = nr, %o2 = vaddrs[] */
272 sllx %o1, 3, %g1
273 mov %o2, %g2
274 mov %o0, %g3
2751: sub %g1, (1 << 3), %g1
276 ldx [%g2 + %g1], %o0 /* ARG0: vaddr + IMMU-bit */
277 mov %g3, %o1 /* ARG1: mmu context */
278 mov HV_MMU_DMMU, %o2
279 andcc %o0, 1, %g0
280 movne %icc, HV_MMU_ALL, %o2 /* ARG2: flags */
281 andn %o0, 1, %o0
282 ta HV_MMU_UNMAP_ADDR_TRAP
283 brnz,pt %g1, 1b
284 nop
285 retl
286 nop
287
288__hypervisor_flush_tlb_kernel_range: /* 14 insns */
289 /* %o0=start, %o1=end */
290 cmp %o0, %o1
291 be,pn %xcc, 2f
292 sethi %hi(PAGE_SIZE), %g3
293 mov %o0, %g1
294 sub %o1, %g1, %g2
295 sub %g2, %g3, %g2
2961: add %g1, %g2, %o0 /* ARG0: virtual address */
297 mov 0, %o1 /* ARG1: mmu context */
298 mov HV_MMU_ALL, %o2 /* ARG2: flags */
299 ta HV_MMU_UNMAP_ADDR_TRAP
300 brnz,pt %g2, 1b
301 sub %g2, %g3, %g2
3022: retl
303 nop
304
305#ifdef DCACHE_ALIASING_POSSIBLE
306 /* XXX Niagara and friends have an 8K cache, so no aliasing is
307 * XXX possible, but nothing explicit in the Hypervisor API
308 * XXX guarantees this.
309 */
310__hypervisor_flush_dcache_page: /* 2 insns */
311 retl
312 nop
313#endif
314
315tlb_patch_one:
Linus Torvalds1da177e2005-04-16 15:20:36 -07003161: lduw [%o1], %g1
317 stw %g1, [%o0]
318 flush %o0
319 subcc %o2, 1, %o2
320 add %o1, 4, %o1
321 bne,pt %icc, 1b
322 add %o0, 4, %o0
323 retl
324 nop
325
326 .globl cheetah_patch_cachetlbops
327cheetah_patch_cachetlbops:
328 save %sp, -128, %sp
329
330 sethi %hi(__flush_tlb_mm), %o0
331 or %o0, %lo(__flush_tlb_mm), %o0
332 sethi %hi(__cheetah_flush_tlb_mm), %o1
333 or %o1, %lo(__cheetah_flush_tlb_mm), %o1
David S. Miller52bf0822006-02-04 03:08:37 -0800334 call tlb_patch_one
David S. Miller4da808c2006-01-31 18:33:00 -0800335 mov 19, %o2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336
337 sethi %hi(__flush_tlb_pending), %o0
338 or %o0, %lo(__flush_tlb_pending), %o0
339 sethi %hi(__cheetah_flush_tlb_pending), %o1
340 or %o1, %lo(__cheetah_flush_tlb_pending), %o1
David S. Miller52bf0822006-02-04 03:08:37 -0800341 call tlb_patch_one
David S. Miller4da808c2006-01-31 18:33:00 -0800342 mov 27, %o2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343
344#ifdef DCACHE_ALIASING_POSSIBLE
345 sethi %hi(__flush_dcache_page), %o0
346 or %o0, %lo(__flush_dcache_page), %o0
David S. Millerc5bd50a2005-09-26 16:06:03 -0700347 sethi %hi(__cheetah_flush_dcache_page), %o1
348 or %o1, %lo(__cheetah_flush_dcache_page), %o1
David S. Miller52bf0822006-02-04 03:08:37 -0800349 call tlb_patch_one
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350 mov 11, %o2
351#endif /* DCACHE_ALIASING_POSSIBLE */
352
353 ret
354 restore
355
356#ifdef CONFIG_SMP
357 /* These are all called by the slaves of a cross call, at
358 * trap level 1, with interrupts fully disabled.
359 *
360 * Register usage:
361 * %g5 mm->context (all tlb flushes)
362 * %g1 address arg 1 (tlb page and range flushes)
363 * %g7 address arg 2 (tlb range flush only)
364 *
David S. Miller56fb4df2006-02-26 23:24:22 -0800365 * %g6 scratch 1
366 * %g2 scratch 2
367 * %g3 scratch 3
368 * %g4 scratch 4
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369 */
370 .align 32
371 .globl xcall_flush_tlb_mm
David S. Miller52bf0822006-02-04 03:08:37 -0800372xcall_flush_tlb_mm: /* 18 insns */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373 mov PRIMARY_CONTEXT, %g2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374 ldxa [%g2] ASI_DMMU, %g3
David S. Miller2ef27772005-08-30 20:21:34 -0700375 srlx %g3, CTX_PGSZ1_NUC_SHIFT, %g4
376 sllx %g4, CTX_PGSZ1_NUC_SHIFT, %g4
377 or %g5, %g4, %g5 /* Preserve nucleus page size fields */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378 stxa %g5, [%g2] ASI_DMMU
David S. Miller2ef27772005-08-30 20:21:34 -0700379 mov 0x40, %g4
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380 stxa %g0, [%g4] ASI_DMMU_DEMAP
381 stxa %g0, [%g4] ASI_IMMU_DEMAP
382 stxa %g3, [%g2] ASI_DMMU
383 retry
David S. Miller52bf0822006-02-04 03:08:37 -0800384 nop
385 nop
386 nop
387 nop
388 nop
389 nop
390 nop
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391
392 .globl xcall_flush_tlb_pending
David S. Miller52bf0822006-02-04 03:08:37 -0800393xcall_flush_tlb_pending: /* 20 insns */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394 /* %g5=context, %g1=nr, %g7=vaddrs[] */
395 sllx %g1, 3, %g1
396 mov PRIMARY_CONTEXT, %g4
397 ldxa [%g4] ASI_DMMU, %g2
David S. Miller2ef27772005-08-30 20:21:34 -0700398 srlx %g2, CTX_PGSZ1_NUC_SHIFT, %g4
399 sllx %g4, CTX_PGSZ1_NUC_SHIFT, %g4
400 or %g5, %g4, %g5
401 mov PRIMARY_CONTEXT, %g4
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402 stxa %g5, [%g4] ASI_DMMU
4031: sub %g1, (1 << 3), %g1
404 ldx [%g7 + %g1], %g5
405 andcc %g5, 0x1, %g0
406 be,pn %icc, 2f
407
408 andn %g5, 0x1, %g5
409 stxa %g0, [%g5] ASI_IMMU_DEMAP
4102: stxa %g0, [%g5] ASI_DMMU_DEMAP
411 membar #Sync
412 brnz,pt %g1, 1b
413 nop
414 stxa %g2, [%g4] ASI_DMMU
415 retry
416
417 .globl xcall_flush_tlb_kernel_range
David S. Miller52bf0822006-02-04 03:08:37 -0800418xcall_flush_tlb_kernel_range: /* 22 insns */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419 sethi %hi(PAGE_SIZE - 1), %g2
420 or %g2, %lo(PAGE_SIZE - 1), %g2
421 andn %g1, %g2, %g1
422 andn %g7, %g2, %g7
423 sub %g7, %g1, %g3
424 add %g2, 1, %g2
425 sub %g3, %g2, %g3
426 or %g1, 0x20, %g1 ! Nucleus
4271: stxa %g0, [%g1 + %g3] ASI_DMMU_DEMAP
428 stxa %g0, [%g1 + %g3] ASI_IMMU_DEMAP
429 membar #Sync
430 brnz,pt %g3, 1b
431 sub %g3, %g2, %g3
432 retry
433 nop
434 nop
David S. Miller52bf0822006-02-04 03:08:37 -0800435 nop
436 nop
437 nop
438 nop
439 nop
440 nop
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441
442 /* This runs in a very controlled environment, so we do
443 * not need to worry about BH races etc.
444 */
445 .globl xcall_sync_tick
446xcall_sync_tick:
David S. Miller45fec052006-02-05 22:27:28 -0800447
448661: rdpr %pstate, %g2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449 wrpr %g2, PSTATE_IG | PSTATE_AG, %pstate
David S. Millerdf7d6ae2006-02-07 00:00:16 -0800450 .section .sun4v_2insn_patch, "ax"
David S. Miller45fec052006-02-05 22:27:28 -0800451 .word 661b
452 nop
453 nop
454 .previous
455
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456 rdpr %pil, %g2
457 wrpr %g0, 15, %pil
458 sethi %hi(109f), %g7
459 b,pt %xcc, etrap_irq
460109: or %g7, %lo(109b), %g7
461 call smp_synchronize_tick_client
462 nop
463 clr %l6
464 b rtrap_xcall
465 ldx [%sp + PTREGS_OFF + PT_V9_TSTATE], %l1
466
467 /* NOTE: This is SPECIAL!! We do etrap/rtrap however
468 * we choose to deal with the "BH's run with
469 * %pil==15" problem (described in asm/pil.h)
470 * by just invoking rtrap directly past where
471 * BH's are checked for.
472 *
473 * We do it like this because we do not want %pil==15
474 * lockups to prevent regs being reported.
475 */
476 .globl xcall_report_regs
477xcall_report_regs:
David S. Miller45fec052006-02-05 22:27:28 -0800478
479661: rdpr %pstate, %g2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480 wrpr %g2, PSTATE_IG | PSTATE_AG, %pstate
David S. Millerdf7d6ae2006-02-07 00:00:16 -0800481 .section .sun4v_2insn_patch, "ax"
David S. Miller45fec052006-02-05 22:27:28 -0800482 .word 661b
483 nop
484 nop
485 .previous
486
Linus Torvalds1da177e2005-04-16 15:20:36 -0700487 rdpr %pil, %g2
488 wrpr %g0, 15, %pil
489 sethi %hi(109f), %g7
490 b,pt %xcc, etrap_irq
491109: or %g7, %lo(109b), %g7
492 call __show_regs
493 add %sp, PTREGS_OFF, %o0
494 clr %l6
495 /* Has to be a non-v9 branch due to the large distance. */
496 b rtrap_xcall
497 ldx [%sp + PTREGS_OFF + PT_V9_TSTATE], %l1
498
499#ifdef DCACHE_ALIASING_POSSIBLE
500 .align 32
501 .globl xcall_flush_dcache_page_cheetah
502xcall_flush_dcache_page_cheetah: /* %g1 == physical page address */
503 sethi %hi(PAGE_SIZE), %g3
5041: subcc %g3, (1 << 5), %g3
505 stxa %g0, [%g1 + %g3] ASI_DCACHE_INVALIDATE
506 membar #Sync
507 bne,pt %icc, 1b
508 nop
509 retry
510 nop
511#endif /* DCACHE_ALIASING_POSSIBLE */
512
513 .globl xcall_flush_dcache_page_spitfire
514xcall_flush_dcache_page_spitfire: /* %g1 == physical page address
515 %g7 == kernel page virtual address
516 %g5 == (page->mapping != NULL) */
517#ifdef DCACHE_ALIASING_POSSIBLE
518 srlx %g1, (13 - 2), %g1 ! Form tag comparitor
519 sethi %hi(L1DCACHE_SIZE), %g3 ! D$ size == 16K
520 sub %g3, (1 << 5), %g3 ! D$ linesize == 32
5211: ldxa [%g3] ASI_DCACHE_TAG, %g2
522 andcc %g2, 0x3, %g0
523 be,pn %xcc, 2f
524 andn %g2, 0x3, %g2
525 cmp %g2, %g1
526
527 bne,pt %xcc, 2f
528 nop
529 stxa %g0, [%g3] ASI_DCACHE_TAG
530 membar #Sync
5312: cmp %g3, 0
532 bne,pt %xcc, 1b
533 sub %g3, (1 << 5), %g3
534
535 brz,pn %g5, 2f
536#endif /* DCACHE_ALIASING_POSSIBLE */
537 sethi %hi(PAGE_SIZE), %g3
538
5391: flush %g7
540 subcc %g3, (1 << 5), %g3
541 bne,pt %icc, 1b
542 add %g7, (1 << 5), %g7
543
5442: retry
545 nop
546 nop
547
David S. Miller52bf0822006-02-04 03:08:37 -0800548 .globl __hypervisor_xcall_flush_tlb_mm
549__hypervisor_xcall_flush_tlb_mm: /* 18 insns */
550 /* %g5=ctx, g1,g2,g3,g4,g7=scratch, %g6=unusable */
551 mov %o0, %g2
552 mov %o1, %g3
553 mov %o2, %g4
554 mov %o3, %g1
555 mov %o5, %g7
556 clr %o0 /* ARG0: CPU lists unimplemented */
557 clr %o1 /* ARG1: CPU lists unimplemented */
558 mov %g5, %o2 /* ARG2: mmu context */
559 mov HV_MMU_ALL, %o3 /* ARG3: flags */
560 mov HV_FAST_MMU_DEMAP_CTX, %o5
561 ta HV_FAST_TRAP
562 mov %g2, %o0
563 mov %g3, %o1
564 mov %g4, %o2
565 mov %g1, %o3
566 mov %g7, %o5
567 membar #Sync
568 retry
569
570 .globl __hypervisor_xcall_flush_tlb_pending
571__hypervisor_xcall_flush_tlb_pending: /* 18 insns */
572 /* %g5=ctx, %g1=nr, %g7=vaddrs[], %g2,%g3,%g4=scratch, %g6=unusable */
573 sllx %g1, 3, %g1
574 mov %o0, %g2
575 mov %o1, %g3
576 mov %o2, %g4
5771: sub %g1, (1 << 3), %g1
578 ldx [%g7 + %g1], %o0 /* ARG0: virtual address */
579 mov %g5, %o1 /* ARG1: mmu context */
580 mov HV_MMU_DMMU, %o2
581 andcc %o0, 1, %g0
582 movne %icc, HV_MMU_ALL, %o2 /* ARG2: flags */
583 ta HV_MMU_UNMAP_ADDR_TRAP
584 brnz,pt %g1, 1b
585 nop
586 mov %g2, %o0
587 mov %g3, %o1
588 mov %g4, %o2
589 membar #Sync
590 retry
591
592 .globl __hypervisor_xcall_flush_tlb_kernel_range
593__hypervisor_xcall_flush_tlb_kernel_range: /* 22 insns */
594 /* %g1=start, %g7=end, g2,g3,g4,g5=scratch, g6=unusable */
595 sethi %hi(PAGE_SIZE - 1), %g2
596 or %g2, %lo(PAGE_SIZE - 1), %g2
597 andn %g1, %g2, %g1
598 andn %g7, %g2, %g7
599 sub %g7, %g1, %g3
600 add %g2, 1, %g2
601 sub %g3, %g2, %g3
602 mov %o0, %g2
603 mov %o1, %g4
604 mov %o2, %g5
6051: add %g1, %g3, %o0 /* ARG0: virtual address */
606 mov 0, %o1 /* ARG1: mmu context */
607 mov HV_MMU_ALL, %o2 /* ARG2: flags */
608 ta HV_MMU_UNMAP_ADDR_TRAP
609 sethi %hi(PAGE_SIZE), %o2
610 brnz,pt %g3, 1b
611 sub %g3, %o2, %g3
612 mov %g2, %o0
613 mov %g4, %o1
614 mov %g5, %o2
615 membar #Sync
616 retry
617
Linus Torvalds1da177e2005-04-16 15:20:36 -0700618 /* These just get rescheduled to PIL vectors. */
619 .globl xcall_call_function
620xcall_call_function:
621 wr %g0, (1 << PIL_SMP_CALL_FUNC), %set_softint
622 retry
623
624 .globl xcall_receive_signal
625xcall_receive_signal:
626 wr %g0, (1 << PIL_SMP_RECEIVE_SIGNAL), %set_softint
627 retry
628
629 .globl xcall_capture
630xcall_capture:
631 wr %g0, (1 << PIL_SMP_CAPTURE), %set_softint
632 retry
633
634#endif /* CONFIG_SMP */
David S. Miller52bf0822006-02-04 03:08:37 -0800635
636
637 .globl hypervisor_patch_cachetlbops
638hypervisor_patch_cachetlbops:
639 save %sp, -128, %sp
640
641 sethi %hi(__flush_tlb_mm), %o0
642 or %o0, %lo(__flush_tlb_mm), %o0
643 sethi %hi(__hypervisor_flush_tlb_mm), %o1
644 or %o1, %lo(__hypervisor_flush_tlb_mm), %o1
645 call tlb_patch_one
646 mov 8, %o2
647
648 sethi %hi(__flush_tlb_pending), %o0
649 or %o0, %lo(__flush_tlb_pending), %o0
650 sethi %hi(__hypervisor_flush_tlb_pending), %o1
651 or %o1, %lo(__hypervisor_flush_tlb_pending), %o1
652 call tlb_patch_one
653 mov 15, %o2
654
655 sethi %hi(__flush_tlb_kernel_range), %o0
656 or %o0, %lo(__flush_tlb_kernel_range), %o0
657 sethi %hi(__hypervisor_flush_tlb_kernel_range), %o1
658 or %o1, %lo(__hypervisor_flush_tlb_kernel_range), %o1
659 call tlb_patch_one
660 mov 14, %o2
661
662#ifdef DCACHE_ALIASING_POSSIBLE
663 sethi %hi(__flush_dcache_page), %o0
664 or %o0, %lo(__flush_dcache_page), %o0
665 sethi %hi(__hypervisor_flush_dcache_page), %o1
666 or %o1, %lo(__hypervisor_flush_dcache_page), %o1
667 call tlb_patch_one
668 mov 2, %o2
669#endif /* DCACHE_ALIASING_POSSIBLE */
670
671#ifdef CONFIG_SMP
672 sethi %hi(xcall_flush_tlb_mm), %o0
673 or %o0, %lo(xcall_flush_tlb_mm), %o0
674 sethi %hi(__hypervisor_xcall_flush_tlb_mm), %o1
675 or %o1, %lo(__hypervisor_xcall_flush_tlb_mm), %o1
676 call tlb_patch_one
677 mov 18, %o2
678
679 sethi %hi(xcall_flush_tlb_pending), %o0
680 or %o0, %lo(xcall_flush_tlb_pending), %o0
681 sethi %hi(__hypervisor_xcall_flush_tlb_pending), %o1
682 or %o1, %lo(__hypervisor_xcall_flush_tlb_pending), %o1
683 call tlb_patch_one
684 mov 18, %o2
685
686 sethi %hi(xcall_flush_tlb_kernel_range), %o0
687 or %o0, %lo(xcall_flush_tlb_kernel_range), %o0
688 sethi %hi(__hypervisor_xcall_flush_tlb_kernel_range), %o1
689 or %o1, %lo(__hypervisor_xcall_flush_tlb_kernel_range), %o1
690 call tlb_patch_one
691 mov 22, %o2
692#endif /* CONFIG_SMP */
693
694 ret
695 restore