?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
[MIPS] Always pass -msoft-float.
[linux-2.6/openmoko-kernel/knife-kernel.git] / arch / sparc / mm / srmmu.c
blobc664b962987cdde1ad1a5bd17d288dbd2e907c75
1 /*
2 * srmmu.c: SRMMU specific routines for memory management.
3 *
4 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
5 * Copyright (C) 1995,2002 Pete Zaitcev (zaitcev@yahoo.com)
6 * Copyright (C) 1996 Eddie C. Dost (ecd@skynet.be)
7 * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
8 * Copyright (C) 1999,2000 Anton Blanchard (anton@samba.org)
9 */
10
11 #include <linux/config.h>
12 #include <linux/kernel.h>
13 #include <linux/mm.h>
14 #include <linux/slab.h>
15 #include <linux/vmalloc.h>
16 #include <linux/pagemap.h>
17 #include <linux/init.h>
18 #include <linux/spinlock.h>
19 #include <linux/bootmem.h>
20 #include <linux/fs.h>
21 #include <linux/seq_file.h>
22
23 #include <asm/bitext.h>
24 #include <asm/page.h>
25 #include <asm/pgalloc.h>
26 #include <asm/pgtable.h>
27 #include <asm/io.h>
28 #include <asm/kdebug.h>
29 #include <asm/vaddrs.h>
30 #include <asm/traps.h>
31 #include <asm/smp.h>
32 #include <asm/mbus.h>
33 #include <asm/cache.h>
34 #include <asm/oplib.h>
35 #include <asm/sbus.h>
36 #include <asm/asi.h>
37 #include <asm/msi.h>
38 #include <asm/a.out.h>
39 #include <asm/mmu_context.h>
40 #include <asm/io-unit.h>
41 #include <asm/cacheflush.h>
42 #include <asm/tlbflush.h>
43
44 /* Now the cpu specific definitions. */
45 #include <asm/viking.h>
46 #include <asm/mxcc.h>
47 #include <asm/ross.h>
48 #include <asm/tsunami.h>
49 #include <asm/swift.h>
50 #include <asm/turbosparc.h>
51
52 #include <asm/btfixup.h>
53
54 enum mbus_module srmmu_modtype;
55 unsigned int hwbug_bitmask;
56 int vac_cache_size;
57 int vac_line_size;
58
59 extern struct resource sparc_iomap;
60
61 extern unsigned long last_valid_pfn;
62
63 extern unsigned long page_kernel;
64
65 pgd_t *srmmu_swapper_pg_dir;
66
67 #ifdef CONFIG_SMP
68 #define FLUSH_BEGIN(mm)
69 #define FLUSH_END
70 #else
71 #define FLUSH_BEGIN(mm) if((mm)->context != NO_CONTEXT) {
72 #define FLUSH_END }
73 #endif
74
75 BTFIXUPDEF_CALL(void, flush_page_for_dma, unsigned long)
76 #define flush_page_for_dma(page) BTFIXUP_CALL(flush_page_for_dma)(page)
77
78 int flush_page_for_dma_global = 1;
79
80 #ifdef CONFIG_SMP
81 BTFIXUPDEF_CALL(void, local_flush_page_for_dma, unsigned long)
82 #define local_flush_page_for_dma(page) BTFIXUP_CALL(local_flush_page_for_dma)(page)
83 #endif
84
85 char *srmmu_name;
86
87 ctxd_t *srmmu_ctx_table_phys;
88 ctxd_t *srmmu_context_table;
89
90 int viking_mxcc_present;
91 static DEFINE_SPINLOCK(srmmu_context_spinlock);
92
93 int is_hypersparc;
94
95 /*
96 * In general all page table modifications should use the V8 atomic
97 * swap instruction. This insures the mmu and the cpu are in sync
98 * with respect to ref/mod bits in the page tables.
99 */
100 static inline unsigned long srmmu_swap(unsigned long *addr, unsigned long value)
101 {
102 __asm__ __volatile__("swap [%2], %0" : "=&r" (value) : "0" (value), "r" (addr));
103 return value;
104 }
105
106 static inline void srmmu_set_pte(pte_t *ptep, pte_t pteval)
107 {
108 srmmu_swap((unsigned long *)ptep, pte_val(pteval));
109 }
110
111 /* The very generic SRMMU page table operations. */
112 static inline int srmmu_device_memory(unsigned long x)
113 {
114 return ((x & 0xF0000000) != 0);
115 }
116
117 int srmmu_cache_pagetables;
118
119 /* these will be initialized in srmmu_nocache_calcsize() */
120 unsigned long srmmu_nocache_size;
121 unsigned long srmmu_nocache_end;
122
123 /* 1 bit <=> 256 bytes of nocache <=> 64 PTEs */
124 #define SRMMU_NOCACHE_BITMAP_SHIFT (PAGE_SHIFT - 4)
125
126 /* The context table is a nocache user with the biggest alignment needs. */
127 #define SRMMU_NOCACHE_ALIGN_MAX (sizeof(ctxd_t)*SRMMU_MAX_CONTEXTS)
128
129 void *srmmu_nocache_pool;
130 void *srmmu_nocache_bitmap;
131 static struct bit_map srmmu_nocache_map;
132
133 static unsigned long srmmu_pte_pfn(pte_t pte)
134 {
135 if (srmmu_device_memory(pte_val(pte))) {
136 /* Just return something that will cause
137 * pfn_valid() to return false. This makes
138 * copy_one_pte() to just directly copy to
139 * PTE over.
140 */
141 return ~0UL;
142 }
143 return (pte_val(pte) & SRMMU_PTE_PMASK) >> (PAGE_SHIFT-4);
144 }
145
146 static struct page *srmmu_pmd_page(pmd_t pmd)
147 {
148
149 if (srmmu_device_memory(pmd_val(pmd)))
150 BUG();
151 return pfn_to_page((pmd_val(pmd) & SRMMU_PTD_PMASK) >> (PAGE_SHIFT-4));
152 }
153
154 static inline unsigned long srmmu_pgd_page(pgd_t pgd)
155 { return srmmu_device_memory(pgd_val(pgd))?~0:(unsigned long)__nocache_va((pgd_val(pgd) & SRMMU_PTD_PMASK) << 4); }
156
157
158 static inline int srmmu_pte_none(pte_t pte)
159 { return !(pte_val(pte) & 0xFFFFFFF); }
160
161 static inline int srmmu_pte_present(pte_t pte)
162 { return ((pte_val(pte) & SRMMU_ET_MASK) == SRMMU_ET_PTE); }
163
164 static inline int srmmu_pte_read(pte_t pte)
165 { return !(pte_val(pte) & SRMMU_NOREAD); }
166
167 static inline void srmmu_pte_clear(pte_t *ptep)
168 { srmmu_set_pte(ptep, __pte(0)); }
169
170 static inline int srmmu_pmd_none(pmd_t pmd)
171 { return !(pmd_val(pmd) & 0xFFFFFFF); }
172
173 static inline int srmmu_pmd_bad(pmd_t pmd)
174 { return (pmd_val(pmd) & SRMMU_ET_MASK) != SRMMU_ET_PTD; }
175
176 static inline int srmmu_pmd_present(pmd_t pmd)
177 { return ((pmd_val(pmd) & SRMMU_ET_MASK) == SRMMU_ET_PTD); }
178
179 static inline void srmmu_pmd_clear(pmd_t *pmdp) {
180 int i;
181 for (i = 0; i < PTRS_PER_PTE/SRMMU_REAL_PTRS_PER_PTE; i++)
182 srmmu_set_pte((pte_t *)&pmdp->pmdv[i], __pte(0));
183 }
184
185 static inline int srmmu_pgd_none(pgd_t pgd)
186 { return !(pgd_val(pgd) & 0xFFFFFFF); }
187
188 static inline int srmmu_pgd_bad(pgd_t pgd)
189 { return (pgd_val(pgd) & SRMMU_ET_MASK) != SRMMU_ET_PTD; }
190
191 static inline int srmmu_pgd_present(pgd_t pgd)
192 { return ((pgd_val(pgd) & SRMMU_ET_MASK) == SRMMU_ET_PTD); }
193
194 static inline void srmmu_pgd_clear(pgd_t * pgdp)
195 { srmmu_set_pte((pte_t *)pgdp, __pte(0)); }
196
197 static inline pte_t srmmu_pte_wrprotect(pte_t pte)
198 { return __pte(pte_val(pte) & ~SRMMU_WRITE);}
199
200 static inline pte_t srmmu_pte_mkclean(pte_t pte)
201 { return __pte(pte_val(pte) & ~SRMMU_DIRTY);}
202
203 static inline pte_t srmmu_pte_mkold(pte_t pte)
204 { return __pte(pte_val(pte) & ~SRMMU_REF);}
205
206 static inline pte_t srmmu_pte_mkwrite(pte_t pte)
207 { return __pte(pte_val(pte) | SRMMU_WRITE);}
208
209 static inline pte_t srmmu_pte_mkdirty(pte_t pte)
210 { return __pte(pte_val(pte) | SRMMU_DIRTY);}
211
212 static inline pte_t srmmu_pte_mkyoung(pte_t pte)
213 { return __pte(pte_val(pte) | SRMMU_REF);}
214
215 /*
216 * Conversion functions: convert a page and protection to a page entry,
217 * and a page entry and page directory to the page they refer to.
218 */
219 static pte_t srmmu_mk_pte(struct page *page, pgprot_t pgprot)
220 { return __pte((page_to_pfn(page) << (PAGE_SHIFT-4)) | pgprot_val(pgprot)); }
221
222 static pte_t srmmu_mk_pte_phys(unsigned long page, pgprot_t pgprot)
223 { return __pte(((page) >> 4) | pgprot_val(pgprot)); }
224
225 static pte_t srmmu_mk_pte_io(unsigned long page, pgprot_t pgprot, int space)
226 { return __pte(((page) >> 4) | (space << 28) | pgprot_val(pgprot)); }
227
228 /* XXX should we hyper_flush_whole_icache here - Anton */
229 static inline void srmmu_ctxd_set(ctxd_t *ctxp, pgd_t *pgdp)
230 { srmmu_set_pte((pte_t *)ctxp, (SRMMU_ET_PTD | (__nocache_pa((unsigned long) pgdp) >> 4))); }
231
232 static inline void srmmu_pgd_set(pgd_t * pgdp, pmd_t * pmdp)
233 { srmmu_set_pte((pte_t *)pgdp, (SRMMU_ET_PTD | (__nocache_pa((unsigned long) pmdp) >> 4))); }
234
235 static void srmmu_pmd_set(pmd_t *pmdp, pte_t *ptep)
236 {
237 unsigned long ptp; /* Physical address, shifted right by 4 */
238 int i;
239
240 ptp = __nocache_pa((unsigned long) ptep) >> 4;
241 for (i = 0; i < PTRS_PER_PTE/SRMMU_REAL_PTRS_PER_PTE; i++) {
242 srmmu_set_pte((pte_t *)&pmdp->pmdv[i], SRMMU_ET_PTD | ptp);
243 ptp += (SRMMU_REAL_PTRS_PER_PTE*sizeof(pte_t) >> 4);
244 }
245 }
246
247 static void srmmu_pmd_populate(pmd_t *pmdp, struct page *ptep)
248 {
249 unsigned long ptp; /* Physical address, shifted right by 4 */
250 int i;
251
252 ptp = page_to_pfn(ptep) << (PAGE_SHIFT-4); /* watch for overflow */
253 for (i = 0; i < PTRS_PER_PTE/SRMMU_REAL_PTRS_PER_PTE; i++) {
254 srmmu_set_pte((pte_t *)&pmdp->pmdv[i], SRMMU_ET_PTD | ptp);
255 ptp += (SRMMU_REAL_PTRS_PER_PTE*sizeof(pte_t) >> 4);
256 }
257 }
258
259 static inline pte_t srmmu_pte_modify(pte_t pte, pgprot_t newprot)
260 { return __pte((pte_val(pte) & SRMMU_CHG_MASK) | pgprot_val(newprot)); }
261
262 /* to find an entry in a top-level page table... */
263 static inline pgd_t *srmmu_pgd_offset(struct mm_struct * mm, unsigned long address)
264 { return mm->pgd + (address >> SRMMU_PGDIR_SHIFT); }
265
266 /* Find an entry in the second-level page table.. */
267 static inline pmd_t *srmmu_pmd_offset(pgd_t * dir, unsigned long address)
268 {
269 return (pmd_t *) srmmu_pgd_page(*dir) +
270 ((address >> PMD_SHIFT) & (PTRS_PER_PMD - 1));
271 }
272
273 /* Find an entry in the third-level page table.. */
274 static inline pte_t *srmmu_pte_offset(pmd_t * dir, unsigned long address)
275 {
276 void *pte;
277
278 pte = __nocache_va((dir->pmdv[0] & SRMMU_PTD_PMASK) << 4);
279 return (pte_t *) pte +
280 ((address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1));
281 }
282
283 static unsigned long srmmu_swp_type(swp_entry_t entry)
284 {
285 return (entry.val >> SRMMU_SWP_TYPE_SHIFT) & SRMMU_SWP_TYPE_MASK;
286 }
287
288 static unsigned long srmmu_swp_offset(swp_entry_t entry)
289 {
290 return (entry.val >> SRMMU_SWP_OFF_SHIFT) & SRMMU_SWP_OFF_MASK;
291 }
292
293 static swp_entry_t srmmu_swp_entry(unsigned long type, unsigned long offset)
294 {
295 return (swp_entry_t) {
296 (type & SRMMU_SWP_TYPE_MASK) << SRMMU_SWP_TYPE_SHIFT
297 | (offset & SRMMU_SWP_OFF_MASK) << SRMMU_SWP_OFF_SHIFT };
298 }
299
300 /*
301 * size: bytes to allocate in the nocache area.
302 * align: bytes, number to align at.
303 * Returns the virtual address of the allocated area.
304 */
305 static unsigned long __srmmu_get_nocache(int size, int align)
306 {
307 int offset;
308
309 if (size < SRMMU_NOCACHE_BITMAP_SHIFT) {
310 printk("Size 0x%x too small for nocache request\n", size);
311 size = SRMMU_NOCACHE_BITMAP_SHIFT;
312 }
313 if (size & (SRMMU_NOCACHE_BITMAP_SHIFT-1)) {
314 printk("Size 0x%x unaligned int nocache request\n", size);
315 size += SRMMU_NOCACHE_BITMAP_SHIFT-1;
316 }
317 BUG_ON(align > SRMMU_NOCACHE_ALIGN_MAX);
318
319 offset = bit_map_string_get(&srmmu_nocache_map,
320 size >> SRMMU_NOCACHE_BITMAP_SHIFT,
321 align >> SRMMU_NOCACHE_BITMAP_SHIFT);
322 if (offset == -1) {
323 printk("srmmu: out of nocache %d: %d/%d\n",
324 size, (int) srmmu_nocache_size,
325 srmmu_nocache_map.used << SRMMU_NOCACHE_BITMAP_SHIFT);
326 return 0;
327 }
328
329 return (SRMMU_NOCACHE_VADDR + (offset << SRMMU_NOCACHE_BITMAP_SHIFT));
330 }
331
332 unsigned inline long srmmu_get_nocache(int size, int align)
333 {
334 unsigned long tmp;
335
336 tmp = __srmmu_get_nocache(size, align);
337
338 if (tmp)
339 memset((void *)tmp, 0, size);
340
341 return tmp;
342 }
343
344 void srmmu_free_nocache(unsigned long vaddr, int size)
345 {
346 int offset;
347
348 if (vaddr < SRMMU_NOCACHE_VADDR) {
349 printk("Vaddr %lx is smaller than nocache base 0x%lx\n",
350 vaddr, (unsigned long)SRMMU_NOCACHE_VADDR);
351 BUG();
352 }
353 if (vaddr+size > srmmu_nocache_end) {
354 printk("Vaddr %lx is bigger than nocache end 0x%lx\n",
355 vaddr, srmmu_nocache_end);
356 BUG();
357 }
358 if (size & (size-1)) {
359 printk("Size 0x%x is not a power of 2\n", size);
360 BUG();
361 }
362 if (size < SRMMU_NOCACHE_BITMAP_SHIFT) {
363 printk("Size 0x%x is too small\n", size);
364 BUG();
365 }
366 if (vaddr & (size-1)) {
367 printk("Vaddr %lx is not aligned to size 0x%x\n", vaddr, size);
368 BUG();
369 }
370
371 offset = (vaddr - SRMMU_NOCACHE_VADDR) >> SRMMU_NOCACHE_BITMAP_SHIFT;
372 size = size >> SRMMU_NOCACHE_BITMAP_SHIFT;
373
374 bit_map_clear(&srmmu_nocache_map, offset, size);
375 }
376
377 void srmmu_early_allocate_ptable_skeleton(unsigned long start, unsigned long end);
378
379 extern unsigned long probe_memory(void); /* in fault.c */
380
381 /*
382 * Reserve nocache dynamically proportionally to the amount of
383 * system RAM. -- Tomas Szepe <szepe@pinerecords.com>, June 2002
384 */
385 void srmmu_nocache_calcsize(void)
386 {
387 unsigned long sysmemavail = probe_memory() / 1024;
388 int srmmu_nocache_npages;
389
390 srmmu_nocache_npages =
391 sysmemavail / SRMMU_NOCACHE_ALCRATIO / 1024 * 256;
392
393 /* P3 XXX The 4x overuse: corroborated by /proc/meminfo. */
394 // if (srmmu_nocache_npages < 256) srmmu_nocache_npages = 256;
395 if (srmmu_nocache_npages < SRMMU_MIN_NOCACHE_PAGES)
396 srmmu_nocache_npages = SRMMU_MIN_NOCACHE_PAGES;
397
398 /* anything above 1280 blows up */
399 if (srmmu_nocache_npages > SRMMU_MAX_NOCACHE_PAGES)
400 srmmu_nocache_npages = SRMMU_MAX_NOCACHE_PAGES;
401
402 srmmu_nocache_size = srmmu_nocache_npages * PAGE_SIZE;
403 srmmu_nocache_end = SRMMU_NOCACHE_VADDR + srmmu_nocache_size;
404 }
405
406 void srmmu_nocache_init(void)
407 {
408 unsigned int bitmap_bits;
409 pgd_t *pgd;
410 pmd_t *pmd;
411 pte_t *pte;
412 unsigned long paddr, vaddr;
413 unsigned long pteval;
414
415 bitmap_bits = srmmu_nocache_size >> SRMMU_NOCACHE_BITMAP_SHIFT;
416
417 srmmu_nocache_pool = __alloc_bootmem(srmmu_nocache_size,
418 SRMMU_NOCACHE_ALIGN_MAX, 0UL);
419 memset(srmmu_nocache_pool, 0, srmmu_nocache_size);
420
421 srmmu_nocache_bitmap = __alloc_bootmem(bitmap_bits >> 3, SMP_CACHE_BYTES, 0UL);
422 bit_map_init(&srmmu_nocache_map, srmmu_nocache_bitmap, bitmap_bits);
423
424 srmmu_swapper_pg_dir = (pgd_t *)__srmmu_get_nocache(SRMMU_PGD_TABLE_SIZE, SRMMU_PGD_TABLE_SIZE);
425 memset(__nocache_fix(srmmu_swapper_pg_dir), 0, SRMMU_PGD_TABLE_SIZE);
426 init_mm.pgd = srmmu_swapper_pg_dir;
427
428 srmmu_early_allocate_ptable_skeleton(SRMMU_NOCACHE_VADDR, srmmu_nocache_end);
429
430 paddr = __pa((unsigned long)srmmu_nocache_pool);
431 vaddr = SRMMU_NOCACHE_VADDR;
432
433 while (vaddr < srmmu_nocache_end) {
434 pgd = pgd_offset_k(vaddr);
435 pmd = srmmu_pmd_offset(__nocache_fix(pgd), vaddr);
436 pte = srmmu_pte_offset(__nocache_fix(pmd), vaddr);
437
438 pteval = ((paddr >> 4) | SRMMU_ET_PTE | SRMMU_PRIV);
439
440 if (srmmu_cache_pagetables)
441 pteval |= SRMMU_CACHE;
442
443 srmmu_set_pte(__nocache_fix(pte), __pte(pteval));
444
445 vaddr += PAGE_SIZE;
446 paddr += PAGE_SIZE;
447 }
448
449 flush_cache_all();
450 flush_tlb_all();
451 }
452
453 static inline pgd_t *srmmu_get_pgd_fast(void)
454 {
455 pgd_t *pgd = NULL;
456
457 pgd = (pgd_t *)__srmmu_get_nocache(SRMMU_PGD_TABLE_SIZE, SRMMU_PGD_TABLE_SIZE);
458 if (pgd) {
459 pgd_t *init = pgd_offset_k(0);
460 memset(pgd, 0, USER_PTRS_PER_PGD * sizeof(pgd_t));
461 memcpy(pgd + USER_PTRS_PER_PGD, init + USER_PTRS_PER_PGD,
462 (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
463 }
464
465 return pgd;
466 }
467
468 static void srmmu_free_pgd_fast(pgd_t *pgd)
469 {
470 srmmu_free_nocache((unsigned long)pgd, SRMMU_PGD_TABLE_SIZE);
471 }
472
473 static pmd_t *srmmu_pmd_alloc_one(struct mm_struct *mm, unsigned long address)
474 {
475 return (pmd_t *)srmmu_get_nocache(SRMMU_PMD_TABLE_SIZE, SRMMU_PMD_TABLE_SIZE);
476 }
477
478 static void srmmu_pmd_free(pmd_t * pmd)
479 {
480 srmmu_free_nocache((unsigned long)pmd, SRMMU_PMD_TABLE_SIZE);
481 }
482
483 /*
484 * Hardware needs alignment to 256 only, but we align to whole page size
485 * to reduce fragmentation problems due to the buddy principle.
486 * XXX Provide actual fragmentation statistics in /proc.
487 *
488 * Alignments up to the page size are the same for physical and virtual
489 * addresses of the nocache area.
490 */
491 static pte_t *
492 srmmu_pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address)
493 {
494 return (pte_t *)srmmu_get_nocache(PTE_SIZE, PTE_SIZE);
495 }
496
497 static struct page *
498 srmmu_pte_alloc_one(struct mm_struct *mm, unsigned long address)
499 {
500 unsigned long pte;
501
502 if ((pte = (unsigned long)srmmu_pte_alloc_one_kernel(mm, address)) == 0)
503 return NULL;
504 return pfn_to_page( __nocache_pa(pte) >> PAGE_SHIFT );
505 }
506
507 static void srmmu_free_pte_fast(pte_t *pte)
508 {
509 srmmu_free_nocache((unsigned long)pte, PTE_SIZE);
510 }
511
512 static void srmmu_pte_free(struct page *pte)
513 {
514 unsigned long p;
515
516 p = (unsigned long)page_address(pte); /* Cached address (for test) */
517 if (p == 0)
518 BUG();
519 p = page_to_pfn(pte) << PAGE_SHIFT; /* Physical address */
520 p = (unsigned long) __nocache_va(p); /* Nocached virtual */
521 srmmu_free_nocache(p, PTE_SIZE);
522 }
523
524 /*
525 */
526 static inline void alloc_context(struct mm_struct *old_mm, struct mm_struct *mm)
527 {
528 struct ctx_list *ctxp;
529
530 ctxp = ctx_free.next;
531 if(ctxp != &ctx_free) {
532 remove_from_ctx_list(ctxp);
533 add_to_used_ctxlist(ctxp);
534 mm->context = ctxp->ctx_number;
535 ctxp->ctx_mm = mm;
536 return;
537 }
538 ctxp = ctx_used.next;
539 if(ctxp->ctx_mm == old_mm)
540 ctxp = ctxp->next;
541 if(ctxp == &ctx_used)
542 panic("out of mmu contexts");
543 flush_cache_mm(ctxp->ctx_mm);
544 flush_tlb_mm(ctxp->ctx_mm);
545 remove_from_ctx_list(ctxp);
546 add_to_used_ctxlist(ctxp);
547 ctxp->ctx_mm->context = NO_CONTEXT;
548 ctxp->ctx_mm = mm;
549 mm->context = ctxp->ctx_number;
550 }
551
552 static inline void free_context(int context)
553 {
554 struct ctx_list *ctx_old;
555
556 ctx_old = ctx_list_pool + context;
557 remove_from_ctx_list(ctx_old);
558 add_to_free_ctxlist(ctx_old);
559 }
560
561
562 static void srmmu_switch_mm(struct mm_struct *old_mm, struct mm_struct *mm,
563 struct task_struct *tsk, int cpu)
564 {
565 if(mm->context == NO_CONTEXT) {
566 spin_lock(&srmmu_context_spinlock);
567 alloc_context(old_mm, mm);
568 spin_unlock(&srmmu_context_spinlock);
569 srmmu_ctxd_set(&srmmu_context_table[mm->context], mm->pgd);
570 }
571
572 if (is_hypersparc)
573 hyper_flush_whole_icache();
574
575 srmmu_set_context(mm->context);
576 }
577
578 /* Low level IO area allocation on the SRMMU. */
579 static inline void srmmu_mapioaddr(unsigned long physaddr,
580 unsigned long virt_addr, int bus_type)
581 {
582 pgd_t *pgdp;
583 pmd_t *pmdp;
584 pte_t *ptep;
585 unsigned long tmp;
586
587 physaddr &= PAGE_MASK;
588 pgdp = pgd_offset_k(virt_addr);
589 pmdp = srmmu_pmd_offset(pgdp, virt_addr);
590 ptep = srmmu_pte_offset(pmdp, virt_addr);
591 tmp = (physaddr >> 4) | SRMMU_ET_PTE;
592
593 /*
594 * I need to test whether this is consistent over all
595 * sun4m's. The bus_type represents the upper 4 bits of
596 * 36-bit physical address on the I/O space lines...
597 */
598 tmp |= (bus_type << 28);
599 tmp |= SRMMU_PRIV;
600 __flush_page_to_ram(virt_addr);
601 srmmu_set_pte(ptep, __pte(tmp));
602 }
603
604 static void srmmu_mapiorange(unsigned int bus, unsigned long xpa,
605 unsigned long xva, unsigned int len)
606 {
607 while (len != 0) {
608 len -= PAGE_SIZE;
609 srmmu_mapioaddr(xpa, xva, bus);
610 xva += PAGE_SIZE;
611 xpa += PAGE_SIZE;
612 }
613 flush_tlb_all();
614 }
615
616 static inline void srmmu_unmapioaddr(unsigned long virt_addr)
617 {
618 pgd_t *pgdp;
619 pmd_t *pmdp;
620 pte_t *ptep;
621
622 pgdp = pgd_offset_k(virt_addr);
623 pmdp = srmmu_pmd_offset(pgdp, virt_addr);
624 ptep = srmmu_pte_offset(pmdp, virt_addr);
625
626 /* No need to flush uncacheable page. */
627 srmmu_pte_clear(ptep);
628 }
629
630 static void srmmu_unmapiorange(unsigned long virt_addr, unsigned int len)
631 {
632 while (len != 0) {
633 len -= PAGE_SIZE;
634 srmmu_unmapioaddr(virt_addr);
635 virt_addr += PAGE_SIZE;
636 }
637 flush_tlb_all();
638 }
639
640 /*
641 * On the SRMMU we do not have the problems with limited tlb entries
642 * for mapping kernel pages, so we just take things from the free page
643 * pool. As a side effect we are putting a little too much pressure
644 * on the gfp() subsystem. This setup also makes the logic of the
645 * iommu mapping code a lot easier as we can transparently handle
646 * mappings on the kernel stack without any special code as we did
647 * need on the sun4c.
648 */
649 struct thread_info *srmmu_alloc_thread_info(void)
650 {
651 struct thread_info *ret;
652
653 ret = (struct thread_info *)__get_free_pages(GFP_KERNEL,
654 THREAD_INFO_ORDER);
655 #ifdef CONFIG_DEBUG_STACK_USAGE
656 if (ret)
657 memset(ret, 0, PAGE_SIZE << THREAD_INFO_ORDER);
658 #endif /* DEBUG_STACK_USAGE */
659
660 return ret;
661 }
662
663 static void srmmu_free_thread_info(struct thread_info *ti)
664 {
665 free_pages((unsigned long)ti, THREAD_INFO_ORDER);
666 }
667
668 /* tsunami.S */
669 extern void tsunami_flush_cache_all(void);
670 extern void tsunami_flush_cache_mm(struct mm_struct *mm);
671 extern void tsunami_flush_cache_range(struct vm_area_struct *vma, unsigned long start, unsigned long end);
672 extern void tsunami_flush_cache_page(struct vm_area_struct *vma, unsigned long page);
673 extern void tsunami_flush_page_to_ram(unsigned long page);
674 extern void tsunami_flush_page_for_dma(unsigned long page);
675 extern void tsunami_flush_sig_insns(struct mm_struct *mm, unsigned long insn_addr);
676 extern void tsunami_flush_tlb_all(void);
677 extern void tsunami_flush_tlb_mm(struct mm_struct *mm);
678 extern void tsunami_flush_tlb_range(struct vm_area_struct *vma, unsigned long start, unsigned long end);
679 extern void tsunami_flush_tlb_page(struct vm_area_struct *vma, unsigned long page);
680 extern void tsunami_setup_blockops(void);
681
682 /*
683 * Workaround, until we find what's going on with Swift. When low on memory,
684 * it sometimes loops in fault/handle_mm_fault incl. flush_tlb_page to find
685 * out it is already in page tables/ fault again on the same instruction.
686 * I really don't understand it, have checked it and contexts
687 * are right, flush_tlb_all is done as well, and it faults again...
688 * Strange. -jj
689 *
690 * The following code is a deadwood that may be necessary when
691 * we start to make precise page flushes again. --zaitcev
692 */
693 static void swift_update_mmu_cache(struct vm_area_struct * vma, unsigned long address, pte_t pte)
694 {
695 #if 0
696 static unsigned long last;
697 unsigned int val;
698 /* unsigned int n; */
699
700 if (address == last) {
701 val = srmmu_hwprobe(address);
702 if (val != 0 && pte_val(pte) != val) {
703 printk("swift_update_mmu_cache: "
704 "addr %lx put %08x probed %08x from %p\n",
705 address, pte_val(pte), val,
706 __builtin_return_address(0));
707 srmmu_flush_whole_tlb();
708 }
709 }
710 last = address;
711 #endif
712 }
713
714 /* swift.S */
715 extern void swift_flush_cache_all(void);
716 extern void swift_flush_cache_mm(struct mm_struct *mm);
717 extern void swift_flush_cache_range(struct vm_area_struct *vma,
718 unsigned long start, unsigned long end);
719 extern void swift_flush_cache_page(struct vm_area_struct *vma, unsigned long page);
720 extern void swift_flush_page_to_ram(unsigned long page);
721 extern void swift_flush_page_for_dma(unsigned long page);
722 extern void swift_flush_sig_insns(struct mm_struct *mm, unsigned long insn_addr);
723 extern void swift_flush_tlb_all(void);
724 extern void swift_flush_tlb_mm(struct mm_struct *mm);
725 extern void swift_flush_tlb_range(struct vm_area_struct *vma,
726 unsigned long start, unsigned long end);
727 extern void swift_flush_tlb_page(struct vm_area_struct *vma, unsigned long page);
728
729 #if 0 /* P3: deadwood to debug precise flushes on Swift. */
730 void swift_flush_tlb_page(struct vm_area_struct *vma, unsigned long page)
731 {
732 int cctx, ctx1;
733
734 page &= PAGE_MASK;
735 if ((ctx1 = vma->vm_mm->context) != -1) {
736 cctx = srmmu_get_context();
737 /* Is context # ever different from current context? P3 */
738 if (cctx != ctx1) {
739 printk("flush ctx %02x curr %02x\n", ctx1, cctx);
740 srmmu_set_context(ctx1);
741 swift_flush_page(page);
742 __asm__ __volatile__("sta %%g0, [%0] %1\n\t" : :
743 "r" (page), "i" (ASI_M_FLUSH_PROBE));
744 srmmu_set_context(cctx);
745 } else {
746 /* Rm. prot. bits from virt. c. */
747 /* swift_flush_cache_all(); */
748 /* swift_flush_cache_page(vma, page); */
749 swift_flush_page(page);
750
751 __asm__ __volatile__("sta %%g0, [%0] %1\n\t" : :
752 "r" (page), "i" (ASI_M_FLUSH_PROBE));
753 /* same as above: srmmu_flush_tlb_page() */
754 }
755 }
756 }
757 #endif
758
759 /*
760 * The following are all MBUS based SRMMU modules, and therefore could
761 * be found in a multiprocessor configuration. On the whole, these
762 * chips seems to be much more touchy about DVMA and page tables
763 * with respect to cache coherency.
764 */
765
766 /* Cypress flushes. */
767 static void cypress_flush_cache_all(void)
768 {
769 volatile unsigned long cypress_sucks;
770 unsigned long faddr, tagval;
771
772 flush_user_windows();
773 for(faddr = 0; faddr < 0x10000; faddr += 0x20) {
774 __asm__ __volatile__("lda [%1 + %2] %3, %0\n\t" :
775 "=r" (tagval) :
776 "r" (faddr), "r" (0x40000),
777 "i" (ASI_M_DATAC_TAG));
778
779 /* If modified and valid, kick it. */
780 if((tagval & 0x60) == 0x60)
781 cypress_sucks = *(unsigned long *)(0xf0020000 + faddr);
782 }
783 }
784
785 static void cypress_flush_cache_mm(struct mm_struct *mm)
786 {
787 register unsigned long a, b, c, d, e, f, g;
788 unsigned long flags, faddr;
789 int octx;
790
791 FLUSH_BEGIN(mm)
792 flush_user_windows();
793 local_irq_save(flags);
794 octx = srmmu_get_context();
795 srmmu_set_context(mm->context);
796 a = 0x20; b = 0x40; c = 0x60;
797 d = 0x80; e = 0xa0; f = 0xc0; g = 0xe0;
798
799 faddr = (0x10000 - 0x100);
800 goto inside;
801 do {
802 faddr -= 0x100;
803 inside:
804 __asm__ __volatile__("sta %%g0, [%0] %1\n\t"
805 "sta %%g0, [%0 + %2] %1\n\t"
806 "sta %%g0, [%0 + %3] %1\n\t"
807 "sta %%g0, [%0 + %4] %1\n\t"
808 "sta %%g0, [%0 + %5] %1\n\t"
809 "sta %%g0, [%0 + %6] %1\n\t"
810 "sta %%g0, [%0 + %7] %1\n\t"
811 "sta %%g0, [%0 + %8] %1\n\t" : :
812 "r" (faddr), "i" (ASI_M_FLUSH_CTX),
813 "r" (a), "r" (b), "r" (c), "r" (d),
814 "r" (e), "r" (f), "r" (g));
815 } while(faddr);
816 srmmu_set_context(octx);
817 local_irq_restore(flags);
818 FLUSH_END
819 }
820
821 static void cypress_flush_cache_range(struct vm_area_struct *vma, unsigned long start, unsigned long end)
822 {
823 struct mm_struct *mm = vma->vm_mm;
824 register unsigned long a, b, c, d, e, f, g;
825 unsigned long flags, faddr;
826 int octx;
827
828 FLUSH_BEGIN(mm)
829 flush_user_windows();
830 local_irq_save(flags);
831 octx = srmmu_get_context();
832 srmmu_set_context(mm->context);
833 a = 0x20; b = 0x40; c = 0x60;
834 d = 0x80; e = 0xa0; f = 0xc0; g = 0xe0;
835
836 start &= SRMMU_REAL_PMD_MASK;
837 while(start < end) {
838 faddr = (start + (0x10000 - 0x100));
839 goto inside;
840 do {
841 faddr -= 0x100;
842 inside:
843 __asm__ __volatile__("sta %%g0, [%0] %1\n\t"
844 "sta %%g0, [%0 + %2] %1\n\t"
845 "sta %%g0, [%0 + %3] %1\n\t"
846 "sta %%g0, [%0 + %4] %1\n\t"
847 "sta %%g0, [%0 + %5] %1\n\t"
848 "sta %%g0, [%0 + %6] %1\n\t"
849 "sta %%g0, [%0 + %7] %1\n\t"
850 "sta %%g0, [%0 + %8] %1\n\t" : :
851 "r" (faddr),
852 "i" (ASI_M_FLUSH_SEG),
853 "r" (a), "r" (b), "r" (c), "r" (d),
854 "r" (e), "r" (f), "r" (g));
855 } while (faddr != start);
856 start += SRMMU_REAL_PMD_SIZE;
857 }
858 srmmu_set_context(octx);
859 local_irq_restore(flags);
860 FLUSH_END
861 }
862
863 static void cypress_flush_cache_page(struct vm_area_struct *vma, unsigned long page)
864 {
865 register unsigned long a, b, c, d, e, f, g;
866 struct mm_struct *mm = vma->vm_mm;
867 unsigned long flags, line;
868 int octx;
869
870 FLUSH_BEGIN(mm)
871 flush_user_windows();
872 local_irq_save(flags);
873 octx = srmmu_get_context();
874 srmmu_set_context(mm->context);
875 a = 0x20; b = 0x40; c = 0x60;
876 d = 0x80; e = 0xa0; f = 0xc0; g = 0xe0;
877
878 page &= PAGE_MASK;
879 line = (page + PAGE_SIZE) - 0x100;
880 goto inside;
881 do {
882 line -= 0x100;
883 inside:
884 __asm__ __volatile__("sta %%g0, [%0] %1\n\t"
885 "sta %%g0, [%0 + %2] %1\n\t"
886 "sta %%g0, [%0 + %3] %1\n\t"
887 "sta %%g0, [%0 + %4] %1\n\t"
888 "sta %%g0, [%0 + %5] %1\n\t"
889 "sta %%g0, [%0 + %6] %1\n\t"
890 "sta %%g0, [%0 + %7] %1\n\t"
891 "sta %%g0, [%0 + %8] %1\n\t" : :
892 "r" (line),
893 "i" (ASI_M_FLUSH_PAGE),
894 "r" (a), "r" (b), "r" (c), "r" (d),
895 "r" (e), "r" (f), "r" (g));
896 } while(line != page);
897 srmmu_set_context(octx);
898 local_irq_restore(flags);
899 FLUSH_END
900 }
901
902 /* Cypress is copy-back, at least that is how we configure it. */
903 static void cypress_flush_page_to_ram(unsigned long page)
904 {
905 register unsigned long a, b, c, d, e, f, g;
906 unsigned long line;
907
908 a = 0x20; b = 0x40; c = 0x60; d = 0x80; e = 0xa0; f = 0xc0; g = 0xe0;
909 page &= PAGE_MASK;
910 line = (page + PAGE_SIZE) - 0x100;
911 goto inside;
912 do {
913 line -= 0x100;
914 inside:
915 __asm__ __volatile__("sta %%g0, [%0] %1\n\t"
916 "sta %%g0, [%0 + %2] %1\n\t"
917 "sta %%g0, [%0 + %3] %1\n\t"
918 "sta %%g0, [%0 + %4] %1\n\t"
919 "sta %%g0, [%0 + %5] %1\n\t"
920 "sta %%g0, [%0 + %6] %1\n\t"
921 "sta %%g0, [%0 + %7] %1\n\t"
922 "sta %%g0, [%0 + %8] %1\n\t" : :
923 "r" (line),
924 "i" (ASI_M_FLUSH_PAGE),
925 "r" (a), "r" (b), "r" (c), "r" (d),
926 "r" (e), "r" (f), "r" (g));
927 } while(line != page);
928 }
929
930 /* Cypress is also IO cache coherent. */
931 static void cypress_flush_page_for_dma(unsigned long page)
932 {
933 }
934
935 /* Cypress has unified L2 VIPT, from which both instructions and data
936 * are stored. It does not have an onboard icache of any sort, therefore
937 * no flush is necessary.
938 */
939 static void cypress_flush_sig_insns(struct mm_struct *mm, unsigned long insn_addr)
940 {
941 }
942
943 static void cypress_flush_tlb_all(void)
944 {
945 srmmu_flush_whole_tlb();
946 }
947
948 static void cypress_flush_tlb_mm(struct mm_struct *mm)
949 {
950 FLUSH_BEGIN(mm)
951 __asm__ __volatile__(
952 "lda [%0] %3, %%g5\n\t"
953 "sta %2, [%0] %3\n\t"
954 "sta %%g0, [%1] %4\n\t"
955 "sta %%g5, [%0] %3\n"
956 : /* no outputs */
957 : "r" (SRMMU_CTX_REG), "r" (0x300), "r" (mm->context),
958 "i" (ASI_M_MMUREGS), "i" (ASI_M_FLUSH_PROBE)
959 : "g5");
960 FLUSH_END
961 }
962
963 static void cypress_flush_tlb_range(struct vm_area_struct *vma, unsigned long start, unsigned long end)
964 {
965 struct mm_struct *mm = vma->vm_mm;
966 unsigned long size;
967
968 FLUSH_BEGIN(mm)
969 start &= SRMMU_PGDIR_MASK;
970 size = SRMMU_PGDIR_ALIGN(end) - start;
971 __asm__ __volatile__(
972 "lda [%0] %5, %%g5\n\t"
973 "sta %1, [%0] %5\n"
974 "1:\n\t"
975 "subcc %3, %4, %3\n\t"
976 "bne 1b\n\t"
977 " sta %%g0, [%2 + %3] %6\n\t"
978 "sta %%g5, [%0] %5\n"
979 : /* no outputs */
980 : "r" (SRMMU_CTX_REG), "r" (mm->context), "r" (start | 0x200),
981 "r" (size), "r" (SRMMU_PGDIR_SIZE), "i" (ASI_M_MMUREGS),
982 "i" (ASI_M_FLUSH_PROBE)
983 : "g5", "cc");
984 FLUSH_END
985 }
986
987 static void cypress_flush_tlb_page(struct vm_area_struct *vma, unsigned long page)
988 {
989 struct mm_struct *mm = vma->vm_mm;
990
991 FLUSH_BEGIN(mm)
992 __asm__ __volatile__(
993 "lda [%0] %3, %%g5\n\t"
994 "sta %1, [%0] %3\n\t"
995 "sta %%g0, [%2] %4\n\t"
996 "sta %%g5, [%0] %3\n"
997 : /* no outputs */
998 : "r" (SRMMU_CTX_REG), "r" (mm->context), "r" (page & PAGE_MASK),
999 "i" (ASI_M_MMUREGS), "i" (ASI_M_FLUSH_PROBE)
1000 : "g5");
1001 FLUSH_END
1002 }
1003
1004 /* viking.S */
1005 extern void viking_flush_cache_all(void);
1006 extern void viking_flush_cache_mm(struct mm_struct *mm);
1007 extern void viking_flush_cache_range(struct vm_area_struct *vma, unsigned long start,
1008 unsigned long end);
1009 extern void viking_flush_cache_page(struct vm_area_struct *vma, unsigned long page);
1010 extern void viking_flush_page_to_ram(unsigned long page);
1011 extern void viking_flush_page_for_dma(unsigned long page);
1012 extern void viking_flush_sig_insns(struct mm_struct *mm, unsigned long addr);
1013 extern void viking_flush_page(unsigned long page);
1014 extern void viking_mxcc_flush_page(unsigned long page);
1015 extern void viking_flush_tlb_all(void);
1016 extern void viking_flush_tlb_mm(struct mm_struct *mm);
1017 extern void viking_flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
1018 unsigned long end);
1019 extern void viking_flush_tlb_page(struct vm_area_struct *vma,
1020 unsigned long page);
1021 extern void sun4dsmp_flush_tlb_all(void);
1022 extern void sun4dsmp_flush_tlb_mm(struct mm_struct *mm);
1023 extern void sun4dsmp_flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
1024 unsigned long end);
1025 extern void sun4dsmp_flush_tlb_page(struct vm_area_struct *vma,
1026 unsigned long page);
1027
1028 /* hypersparc.S */
1029 extern void hypersparc_flush_cache_all(void);
1030 extern void hypersparc_flush_cache_mm(struct mm_struct *mm);
1031 extern void hypersparc_flush_cache_range(struct vm_area_struct *vma, unsigned long start, unsigned long end);
1032 extern void hypersparc_flush_cache_page(struct vm_area_struct *vma, unsigned long page);
1033 extern void hypersparc_flush_page_to_ram(unsigned long page);
1034 extern void hypersparc_flush_page_for_dma(unsigned long page);
1035 extern void hypersparc_flush_sig_insns(struct mm_struct *mm, unsigned long insn_addr);
1036 extern void hypersparc_flush_tlb_all(void);
1037 extern void hypersparc_flush_tlb_mm(struct mm_struct *mm);
1038 extern void hypersparc_flush_tlb_range(struct vm_area_struct *vma, unsigned long start, unsigned long end);
1039 extern void hypersparc_flush_tlb_page(struct vm_area_struct *vma, unsigned long page);
1040 extern void hypersparc_setup_blockops(void);
1041
1042 /*
1043 * NOTE: All of this startup code assumes the low 16mb (approx.) of
1044 * kernel mappings are done with one single contiguous chunk of
1045 * ram. On small ram machines (classics mainly) we only get
1046 * around 8mb mapped for us.
1047 */
1048
1049 void __init early_pgtable_allocfail(char *type)
1050 {
1051 prom_printf("inherit_prom_mappings: Cannot alloc kernel %s.\n", type);
1052 prom_halt();
1053 }
1054
1055 void __init srmmu_early_allocate_ptable_skeleton(unsigned long start, unsigned long end)
1056 {
1057 pgd_t *pgdp;
1058 pmd_t *pmdp;
1059 pte_t *ptep;
1060
1061 while(start < end) {
1062 pgdp = pgd_offset_k(start);
1063 if(srmmu_pgd_none(*(pgd_t *)__nocache_fix(pgdp))) {
1064 pmdp = (pmd_t *) __srmmu_get_nocache(
1065 SRMMU_PMD_TABLE_SIZE, SRMMU_PMD_TABLE_SIZE);
1066 if (pmdp == NULL)
1067 early_pgtable_allocfail("pmd");
1068 memset(__nocache_fix(pmdp), 0, SRMMU_PMD_TABLE_SIZE);
1069 srmmu_pgd_set(__nocache_fix(pgdp), pmdp);
1070 }
1071 pmdp = srmmu_pmd_offset(__nocache_fix(pgdp), start);
1072 if(srmmu_pmd_none(*(pmd_t *)__nocache_fix(pmdp))) {
1073 ptep = (pte_t *)__srmmu_get_nocache(PTE_SIZE, PTE_SIZE);
1074 if (ptep == NULL)
1075 early_pgtable_allocfail("pte");
1076 memset(__nocache_fix(ptep), 0, PTE_SIZE);
1077 srmmu_pmd_set(__nocache_fix(pmdp), ptep);
1078 }
1079 if (start > (0xffffffffUL - PMD_SIZE))
1080 break;
1081 start = (start + PMD_SIZE) & PMD_MASK;
1082 }
1083 }
1084
1085 void __init srmmu_allocate_ptable_skeleton(unsigned long start, unsigned long end)
1086 {
1087 pgd_t *pgdp;
1088 pmd_t *pmdp;
1089 pte_t *ptep;
1090
1091 while(start < end) {
1092 pgdp = pgd_offset_k(start);
1093 if(srmmu_pgd_none(*pgdp)) {
1094 pmdp = (pmd_t *)__srmmu_get_nocache(SRMMU_PMD_TABLE_SIZE, SRMMU_PMD_TABLE_SIZE);
1095 if (pmdp == NULL)
1096 early_pgtable_allocfail("pmd");
1097 memset(pmdp, 0, SRMMU_PMD_TABLE_SIZE);
1098 srmmu_pgd_set(pgdp, pmdp);
1099 }
1100 pmdp = srmmu_pmd_offset(pgdp, start);
1101 if(srmmu_pmd_none(*pmdp)) {
1102 ptep = (pte_t *) __srmmu_get_nocache(PTE_SIZE,
1103 PTE_SIZE);
1104 if (ptep == NULL)
1105 early_pgtable_allocfail("pte");
1106 memset(ptep, 0, PTE_SIZE);
1107 srmmu_pmd_set(pmdp, ptep);
1108 }
1109 if (start > (0xffffffffUL - PMD_SIZE))
1110 break;
1111 start = (start + PMD_SIZE) & PMD_MASK;
1112 }
1113 }
1114
1115 /*
1116 * This is much cleaner than poking around physical address space
1117 * looking at the prom's page table directly which is what most
1118 * other OS's do. Yuck... this is much better.
1119 */
1120 void __init srmmu_inherit_prom_mappings(unsigned long start,unsigned long end)
1121 {
1122 pgd_t *pgdp;
1123 pmd_t *pmdp;
1124 pte_t *ptep;
1125 int what = 0; /* 0 = normal-pte, 1 = pmd-level pte, 2 = pgd-level pte */
1126 unsigned long prompte;
1127
1128 while(start <= end) {
1129 if (start == 0)
1130 break; /* probably wrap around */
1131 if(start == 0xfef00000)
1132 start = KADB_DEBUGGER_BEGVM;
1133 if(!(prompte = srmmu_hwprobe(start))) {
1134 start += PAGE_SIZE;
1135 continue;
1136 }
1137
1138 /* A red snapper, see what it really is. */
1139 what = 0;
1140
1141 if(!(start & ~(SRMMU_REAL_PMD_MASK))) {
1142 if(srmmu_hwprobe((start-PAGE_SIZE) + SRMMU_REAL_PMD_SIZE) == prompte)
1143 what = 1;
1144 }
1145
1146 if(!(start & ~(SRMMU_PGDIR_MASK))) {
1147 if(srmmu_hwprobe((start-PAGE_SIZE) + SRMMU_PGDIR_SIZE) ==
1148 prompte)
1149 what = 2;
1150 }
1151
1152 pgdp = pgd_offset_k(start);
1153 if(what == 2) {
1154 *(pgd_t *)__nocache_fix(pgdp) = __pgd(prompte);
1155 start += SRMMU_PGDIR_SIZE;
1156 continue;
1157 }
1158 if(srmmu_pgd_none(*(pgd_t *)__nocache_fix(pgdp))) {
1159 pmdp = (pmd_t *)__srmmu_get_nocache(SRMMU_PMD_TABLE_SIZE, SRMMU_PMD_TABLE_SIZE);
1160 if (pmdp == NULL)
1161 early_pgtable_allocfail("pmd");
1162 memset(__nocache_fix(pmdp), 0, SRMMU_PMD_TABLE_SIZE);
1163 srmmu_pgd_set(__nocache_fix(pgdp), pmdp);
1164 }
1165 pmdp = srmmu_pmd_offset(__nocache_fix(pgdp), start);
1166 if(srmmu_pmd_none(*(pmd_t *)__nocache_fix(pmdp))) {
1167 ptep = (pte_t *) __srmmu_get_nocache(PTE_SIZE,
1168 PTE_SIZE);
1169 if (ptep == NULL)
1170 early_pgtable_allocfail("pte");
1171 memset(__nocache_fix(ptep), 0, PTE_SIZE);
1172 srmmu_pmd_set(__nocache_fix(pmdp), ptep);
1173 }
1174 if(what == 1) {
1175 /*
1176 * We bend the rule where all 16 PTPs in a pmd_t point
1177 * inside the same PTE page, and we leak a perfectly
1178 * good hardware PTE piece. Alternatives seem worse.
1179 */
1180 unsigned int x; /* Index of HW PMD in soft cluster */
1181 x = (start >> PMD_SHIFT) & 15;
1182 *(unsigned long *)__nocache_fix(&pmdp->pmdv[x]) = prompte;
1183 start += SRMMU_REAL_PMD_SIZE;
1184 continue;
1185 }
1186 ptep = srmmu_pte_offset(__nocache_fix(pmdp), start);
1187 *(pte_t *)__nocache_fix(ptep) = __pte(prompte);
1188 start += PAGE_SIZE;
1189 }
1190 }
1191
1192 #define KERNEL_PTE(page_shifted) ((page_shifted)|SRMMU_CACHE|SRMMU_PRIV|SRMMU_VALID)
1193
1194 /* Create a third-level SRMMU 16MB page mapping. */
1195 static void __init do_large_mapping(unsigned long vaddr, unsigned long phys_base)
1196 {
1197 pgd_t *pgdp = pgd_offset_k(vaddr);
1198 unsigned long big_pte;
1199
1200 big_pte = KERNEL_PTE(phys_base >> 4);
1201 *(pgd_t *)__nocache_fix(pgdp) = __pgd(big_pte);
1202 }
1203
1204 /* Map sp_bank entry SP_ENTRY, starting at virtual address VBASE. */
1205 static unsigned long __init map_spbank(unsigned long vbase, int sp_entry)
1206 {
1207 unsigned long pstart = (sp_banks[sp_entry].base_addr & SRMMU_PGDIR_MASK);
1208 unsigned long vstart = (vbase & SRMMU_PGDIR_MASK);
1209 unsigned long vend = SRMMU_PGDIR_ALIGN(vbase + sp_banks[sp_entry].num_bytes);
1210 /* Map "low" memory only */
1211 const unsigned long min_vaddr = PAGE_OFFSET;
1212 const unsigned long max_vaddr = PAGE_OFFSET + SRMMU_MAXMEM;
1213
1214 if (vstart < min_vaddr || vstart >= max_vaddr)
1215 return vstart;
1216
1217 if (vend > max_vaddr || vend < min_vaddr)
1218 vend = max_vaddr;
1219
1220 while(vstart < vend) {
1221 do_large_mapping(vstart, pstart);
1222 vstart += SRMMU_PGDIR_SIZE; pstart += SRMMU_PGDIR_SIZE;
1223 }
1224 return vstart;
1225 }
1226
1227 static inline void memprobe_error(char *msg)
1228 {
1229 prom_printf(msg);
1230 prom_printf("Halting now...\n");
1231 prom_halt();
1232 }
1233
1234 static inline void map_kernel(void)
1235 {
1236 int i;
1237
1238 if (phys_base > 0) {
1239 do_large_mapping(PAGE_OFFSET, phys_base);
1240 }
1241
1242 for (i = 0; sp_banks[i].num_bytes != 0; i++) {
1243 map_spbank((unsigned long)__va(sp_banks[i].base_addr), i);
1244 }
1245
1246 BTFIXUPSET_SIMM13(user_ptrs_per_pgd, PAGE_OFFSET / SRMMU_PGDIR_SIZE);
1247 }
1248
1249 /* Paging initialization on the Sparc Reference MMU. */
1250 extern void sparc_context_init(int);
1251
1252 void (*poke_srmmu)(void) __initdata = NULL;
1253
1254 extern unsigned long bootmem_init(unsigned long *pages_avail);
1255
1256 void __init srmmu_paging_init(void)
1257 {
1258 int i, cpunode;
1259 char node_str[128];
1260 pgd_t *pgd;
1261 pmd_t *pmd;
1262 pte_t *pte;
1263 unsigned long pages_avail;
1264
1265 sparc_iomap.start = SUN4M_IOBASE_VADDR; /* 16MB of IOSPACE on all sun4m's. */
1266
1267 if (sparc_cpu_model == sun4d)
1268 num_contexts = 65536; /* We know it is Viking */
1269 else {
1270 /* Find the number of contexts on the srmmu. */
1271 cpunode = prom_getchild(prom_root_node);
1272 num_contexts = 0;
1273 while(cpunode != 0) {
1274 prom_getstring(cpunode, "device_type", node_str, sizeof(node_str));
1275 if(!strcmp(node_str, "cpu")) {
1276 num_contexts = prom_getintdefault(cpunode, "mmu-nctx", 0x8);
1277 break;
1278 }
1279 cpunode = prom_getsibling(cpunode);
1280 }
1281 }
1282
1283 if(!num_contexts) {
1284 prom_printf("Something wrong, can't find cpu node in paging_init.\n");
1285 prom_halt();
1286 }
1287
1288 pages_avail = 0;
1289 last_valid_pfn = bootmem_init(&pages_avail);
1290
1291 srmmu_nocache_calcsize();
1292 srmmu_nocache_init();
1293 srmmu_inherit_prom_mappings(0xfe400000,(LINUX_OPPROM_ENDVM-PAGE_SIZE));
1294 map_kernel();
1295
1296 /* ctx table has to be physically aligned to its size */
1297 srmmu_context_table = (ctxd_t *)__srmmu_get_nocache(num_contexts*sizeof(ctxd_t), num_contexts*sizeof(ctxd_t));
1298 srmmu_ctx_table_phys = (ctxd_t *)__nocache_pa((unsigned long)srmmu_context_table);
1299
1300 for(i = 0; i < num_contexts; i++)
1301 srmmu_ctxd_set((ctxd_t *)__nocache_fix(&srmmu_context_table[i]), srmmu_swapper_pg_dir);
1302
1303 flush_cache_all();
1304 srmmu_set_ctable_ptr((unsigned long)srmmu_ctx_table_phys);
1305 flush_tlb_all();
1306 poke_srmmu();
1307
1308 #ifdef CONFIG_SUN_IO
1309 srmmu_allocate_ptable_skeleton(sparc_iomap.start, IOBASE_END);
1310 srmmu_allocate_ptable_skeleton(DVMA_VADDR, DVMA_END);
1311 #endif
1312
1313 srmmu_allocate_ptable_skeleton(
1314 __fix_to_virt(__end_of_fixed_addresses - 1), FIXADDR_TOP);
1315 srmmu_allocate_ptable_skeleton(PKMAP_BASE, PKMAP_END);
1316
1317 pgd = pgd_offset_k(PKMAP_BASE);
1318 pmd = srmmu_pmd_offset(pgd, PKMAP_BASE);
1319 pte = srmmu_pte_offset(pmd, PKMAP_BASE);
1320 pkmap_page_table = pte;
1321
1322 flush_cache_all();
1323 flush_tlb_all();
1324
1325 sparc_context_init(num_contexts);
1326
1327 kmap_init();
1328
1329 {
1330 unsigned long zones_size[MAX_NR_ZONES];
1331 unsigned long zholes_size[MAX_NR_ZONES];
1332 unsigned long npages;
1333 int znum;
1334
1335 for (znum = 0; znum < MAX_NR_ZONES; znum++)
1336 zones_size[znum] = zholes_size[znum] = 0;
1337
1338 npages = max_low_pfn - pfn_base;
1339
1340 zones_size[ZONE_DMA] = npages;
1341 zholes_size[ZONE_DMA] = npages - pages_avail;
1342
1343 npages = highend_pfn - max_low_pfn;
1344 zones_size[ZONE_HIGHMEM] = npages;
1345 zholes_size[ZONE_HIGHMEM] = npages - calc_highpages();
1346
1347 free_area_init_node(0, &contig_page_data, zones_size,
1348 pfn_base, zholes_size);
1349 }
1350 }
1351
1352 static void srmmu_mmu_info(struct seq_file *m)
1353 {
1354 seq_printf(m,
1355 "MMU type\t: %s\n"
1356 "contexts\t: %d\n"
1357 "nocache total\t: %ld\n"
1358 "nocache used\t: %d\n",
1359 srmmu_name,
1360 num_contexts,
1361 srmmu_nocache_size,
1362 srmmu_nocache_map.used << SRMMU_NOCACHE_BITMAP_SHIFT);
1363 }
1364
1365 static void srmmu_update_mmu_cache(struct vm_area_struct * vma, unsigned long address, pte_t pte)
1366 {
1367 }
1368
1369 static void srmmu_destroy_context(struct mm_struct *mm)
1370 {
1371
1372 if(mm->context != NO_CONTEXT) {
1373 flush_cache_mm(mm);
1374 srmmu_ctxd_set(&srmmu_context_table[mm->context], srmmu_swapper_pg_dir);
1375 flush_tlb_mm(mm);
1376 spin_lock(&srmmu_context_spinlock);
1377 free_context(mm->context);
1378 spin_unlock(&srmmu_context_spinlock);
1379 mm->context = NO_CONTEXT;
1380 }
1381 }
1382
1383 /* Init various srmmu chip types. */
1384 static void __init srmmu_is_bad(void)
1385 {
1386 prom_printf("Could not determine SRMMU chip type.\n");
1387 prom_halt();
1388 }
1389
1390 static void __init init_vac_layout(void)
1391 {
1392 int nd, cache_lines;
1393 char node_str[128];
1394 #ifdef CONFIG_SMP
1395 int cpu = 0;
1396 unsigned long max_size = 0;
1397 unsigned long min_line_size = 0x10000000;
1398 #endif
1399
1400 nd = prom_getchild(prom_root_node);
1401 while((nd = prom_getsibling(nd)) != 0) {
1402 prom_getstring(nd, "device_type", node_str, sizeof(node_str));
1403 if(!strcmp(node_str, "cpu")) {
1404 vac_line_size = prom_getint(nd, "cache-line-size");
1405 if (vac_line_size == -1) {
1406 prom_printf("can't determine cache-line-size, "
1407 "halting.\n");
1408 prom_halt();
1409 }
1410 cache_lines = prom_getint(nd, "cache-nlines");
1411 if (cache_lines == -1) {
1412 prom_printf("can't determine cache-nlines, halting.\n");
1413 prom_halt();
1414 }
1415
1416 vac_cache_size = cache_lines * vac_line_size;
1417 #ifdef CONFIG_SMP
1418 if(vac_cache_size > max_size)
1419 max_size = vac_cache_size;
1420 if(vac_line_size < min_line_size)
1421 min_line_size = vac_line_size;
1422 cpu++;
1423 if (cpu >= NR_CPUS || !cpu_online(cpu))
1424 break;
1425 #else
1426 break;
1427 #endif
1428 }
1429 }
1430 if(nd == 0) {
1431 prom_printf("No CPU nodes found, halting.\n");
1432 prom_halt();
1433 }
1434 #ifdef CONFIG_SMP
1435 vac_cache_size = max_size;
1436 vac_line_size = min_line_size;
1437 #endif
1438 printk("SRMMU: Using VAC size of %d bytes, line size %d bytes.\n",
1439 (int)vac_cache_size, (int)vac_line_size);
1440 }
1441
1442 static void __init poke_hypersparc(void)
1443 {
1444 volatile unsigned long clear;
1445 unsigned long mreg = srmmu_get_mmureg();
1446
1447 hyper_flush_unconditional_combined();
1448
1449 mreg &= ~(HYPERSPARC_CWENABLE);
1450 mreg |= (HYPERSPARC_CENABLE | HYPERSPARC_WBENABLE);
1451 mreg |= (HYPERSPARC_CMODE);
1452
1453 srmmu_set_mmureg(mreg);
1454
1455 #if 0 /* XXX I think this is bad news... -DaveM */
1456 hyper_clear_all_tags();
1457 #endif
1458
1459 put_ross_icr(HYPERSPARC_ICCR_FTD | HYPERSPARC_ICCR_ICE);
1460 hyper_flush_whole_icache();
1461 clear = srmmu_get_faddr();
1462 clear = srmmu_get_fstatus();
1463 }
1464
1465 static void __init init_hypersparc(void)
1466 {
1467 srmmu_name = "ROSS HyperSparc";
1468 srmmu_modtype = HyperSparc;
1469
1470 init_vac_layout();
1471
1472 is_hypersparc = 1;
1473
1474 BTFIXUPSET_CALL(pte_clear, srmmu_pte_clear, BTFIXUPCALL_NORM);
1475 BTFIXUPSET_CALL(pmd_clear, srmmu_pmd_clear, BTFIXUPCALL_NORM);
1476 BTFIXUPSET_CALL(pgd_clear, srmmu_pgd_clear, BTFIXUPCALL_NORM);
1477 BTFIXUPSET_CALL(flush_cache_all, hypersparc_flush_cache_all, BTFIXUPCALL_NORM);
1478 BTFIXUPSET_CALL(flush_cache_mm, hypersparc_flush_cache_mm, BTFIXUPCALL_NORM);
1479 BTFIXUPSET_CALL(flush_cache_range, hypersparc_flush_cache_range, BTFIXUPCALL_NORM);
1480 BTFIXUPSET_CALL(flush_cache_page, hypersparc_flush_cache_page, BTFIXUPCALL_NORM);
1481
1482 BTFIXUPSET_CALL(flush_tlb_all, hypersparc_flush_tlb_all, BTFIXUPCALL_NORM);
1483 BTFIXUPSET_CALL(flush_tlb_mm, hypersparc_flush_tlb_mm, BTFIXUPCALL_NORM);
1484 BTFIXUPSET_CALL(flush_tlb_range, hypersparc_flush_tlb_range, BTFIXUPCALL_NORM);
1485 BTFIXUPSET_CALL(flush_tlb_page, hypersparc_flush_tlb_page, BTFIXUPCALL_NORM);
1486
1487 BTFIXUPSET_CALL(__flush_page_to_ram, hypersparc_flush_page_to_ram, BTFIXUPCALL_NORM);
1488 BTFIXUPSET_CALL(flush_sig_insns, hypersparc_flush_sig_insns, BTFIXUPCALL_NORM);
1489 BTFIXUPSET_CALL(flush_page_for_dma, hypersparc_flush_page_for_dma, BTFIXUPCALL_NOP);
1490
1491
1492 poke_srmmu = poke_hypersparc;
1493
1494 hypersparc_setup_blockops();
1495 }
1496
1497 static void __init poke_cypress(void)
1498 {
1499 unsigned long mreg = srmmu_get_mmureg();
1500 unsigned long faddr, tagval;
1501 volatile unsigned long cypress_sucks;
1502 volatile unsigned long clear;
1503
1504 clear = srmmu_get_faddr();
1505 clear = srmmu_get_fstatus();
1506
1507 if (!(mreg & CYPRESS_CENABLE)) {
1508 for(faddr = 0x0; faddr < 0x10000; faddr += 20) {
1509 __asm__ __volatile__("sta %%g0, [%0 + %1] %2\n\t"
1510 "sta %%g0, [%0] %2\n\t" : :
1511 "r" (faddr), "r" (0x40000),
1512 "i" (ASI_M_DATAC_TAG));
1513 }
1514 } else {
1515 for(faddr = 0; faddr < 0x10000; faddr += 0x20) {
1516 __asm__ __volatile__("lda [%1 + %2] %3, %0\n\t" :
1517 "=r" (tagval) :
1518 "r" (faddr), "r" (0x40000),
1519 "i" (ASI_M_DATAC_TAG));
1520
1521 /* If modified and valid, kick it. */
1522 if((tagval & 0x60) == 0x60)
1523 cypress_sucks = *(unsigned long *)
1524 (0xf0020000 + faddr);
1525 }
1526 }
1527
1528 /* And one more, for our good neighbor, Mr. Broken Cypress. */
1529 clear = srmmu_get_faddr();
1530 clear = srmmu_get_fstatus();
1531
1532 mreg |= (CYPRESS_CENABLE | CYPRESS_CMODE);
1533 srmmu_set_mmureg(mreg);
1534 }
1535
1536 static void __init init_cypress_common(void)
1537 {
1538 init_vac_layout();
1539
1540 BTFIXUPSET_CALL(pte_clear, srmmu_pte_clear, BTFIXUPCALL_NORM);
1541 BTFIXUPSET_CALL(pmd_clear, srmmu_pmd_clear, BTFIXUPCALL_NORM);
1542 BTFIXUPSET_CALL(pgd_clear, srmmu_pgd_clear, BTFIXUPCALL_NORM);
1543 BTFIXUPSET_CALL(flush_cache_all, cypress_flush_cache_all, BTFIXUPCALL_NORM);
1544 BTFIXUPSET_CALL(flush_cache_mm, cypress_flush_cache_mm, BTFIXUPCALL_NORM);
1545 BTFIXUPSET_CALL(flush_cache_range, cypress_flush_cache_range, BTFIXUPCALL_NORM);
1546 BTFIXUPSET_CALL(flush_cache_page, cypress_flush_cache_page, BTFIXUPCALL_NORM);
1547
1548 BTFIXUPSET_CALL(flush_tlb_all, cypress_flush_tlb_all, BTFIXUPCALL_NORM);
1549 BTFIXUPSET_CALL(flush_tlb_mm, cypress_flush_tlb_mm, BTFIXUPCALL_NORM);
1550 BTFIXUPSET_CALL(flush_tlb_page, cypress_flush_tlb_page, BTFIXUPCALL_NORM);
1551 BTFIXUPSET_CALL(flush_tlb_range, cypress_flush_tlb_range, BTFIXUPCALL_NORM);
1552
1553
1554 BTFIXUPSET_CALL(__flush_page_to_ram, cypress_flush_page_to_ram, BTFIXUPCALL_NORM);
1555 BTFIXUPSET_CALL(flush_sig_insns, cypress_flush_sig_insns, BTFIXUPCALL_NOP);
1556 BTFIXUPSET_CALL(flush_page_for_dma, cypress_flush_page_for_dma, BTFIXUPCALL_NOP);
1557
1558 poke_srmmu = poke_cypress;
1559 }
1560
1561 static void __init init_cypress_604(void)
1562 {
1563 srmmu_name = "ROSS Cypress-604(UP)";
1564 srmmu_modtype = Cypress;
1565 init_cypress_common();
1566 }
1567
1568 static void __init init_cypress_605(unsigned long mrev)
1569 {
1570 srmmu_name = "ROSS Cypress-605(MP)";
1571 if(mrev == 0xe) {
1572 srmmu_modtype = Cypress_vE;
1573 hwbug_bitmask |= HWBUG_COPYBACK_BROKEN;
1574 } else {
1575 if(mrev == 0xd) {
1576 srmmu_modtype = Cypress_vD;
1577 hwbug_bitmask |= HWBUG_ASIFLUSH_BROKEN;
1578 } else {
1579 srmmu_modtype = Cypress;
1580 }
1581 }
1582 init_cypress_common();
1583 }
1584
1585 static void __init poke_swift(void)
1586 {
1587 unsigned long mreg;
1588
1589 /* Clear any crap from the cache or else... */
1590 swift_flush_cache_all();
1591
1592 /* Enable I & D caches */
1593 mreg = srmmu_get_mmureg();
1594 mreg |= (SWIFT_IE | SWIFT_DE);
1595 /*
1596 * The Swift branch folding logic is completely broken. At
1597 * trap time, if things are just right, if can mistakenly
1598 * think that a trap is coming from kernel mode when in fact
1599 * it is coming from user mode (it mis-executes the branch in
1600 * the trap code). So you see things like crashme completely
1601 * hosing your machine which is completely unacceptable. Turn
1602 * this shit off... nice job Fujitsu.
1603 */
1604 mreg &= ~(SWIFT_BF);
1605 srmmu_set_mmureg(mreg);
1606 }
1607
1608 #define SWIFT_MASKID_ADDR 0x10003018
1609 static void __init init_swift(void)
1610 {
1611 unsigned long swift_rev;
1612
1613 __asm__ __volatile__("lda [%1] %2, %0\n\t"
1614 "srl %0, 0x18, %0\n\t" :
1615 "=r" (swift_rev) :
1616 "r" (SWIFT_MASKID_ADDR), "i" (ASI_M_BYPASS));
1617 srmmu_name = "Fujitsu Swift";
1618 switch(swift_rev) {
1619 case 0x11:
1620 case 0x20:
1621 case 0x23:
1622 case 0x30:
1623 srmmu_modtype = Swift_lots_o_bugs;
1624 hwbug_bitmask |= (HWBUG_KERN_ACCBROKEN | HWBUG_KERN_CBITBROKEN);
1625 /*
1626 * Gee george, I wonder why Sun is so hush hush about
1627 * this hardware bug... really braindamage stuff going
1628 * on here. However I think we can find a way to avoid
1629 * all of the workaround overhead under Linux. Basically,
1630 * any page fault can cause kernel pages to become user
1631 * accessible (the mmu gets confused and clears some of
1632 * the ACC bits in kernel ptes). Aha, sounds pretty
1633 * horrible eh? But wait, after extensive testing it appears
1634 * that if you use pgd_t level large kernel pte's (like the
1635 * 4MB pages on the Pentium) the bug does not get tripped
1636 * at all. This avoids almost all of the major overhead.
1637 * Welcome to a world where your vendor tells you to,
1638 * "apply this kernel patch" instead of "sorry for the
1639 * broken hardware, send it back and we'll give you
1640 * properly functioning parts"
1641 */
1642 break;
1643 case 0x25:
1644 case 0x31:
1645 srmmu_modtype = Swift_bad_c;
1646 hwbug_bitmask |= HWBUG_KERN_CBITBROKEN;
1647 /*
1648 * You see Sun allude to this hardware bug but never
1649 * admit things directly, they'll say things like,
1650 * "the Swift chip cache problems" or similar.
1651 */
1652 break;
1653 default:
1654 srmmu_modtype = Swift_ok;
1655 break;
1656 };
1657
1658 BTFIXUPSET_CALL(flush_cache_all, swift_flush_cache_all, BTFIXUPCALL_NORM);
1659 BTFIXUPSET_CALL(flush_cache_mm, swift_flush_cache_mm, BTFIXUPCALL_NORM);
1660 BTFIXUPSET_CALL(flush_cache_page, swift_flush_cache_page, BTFIXUPCALL_NORM);
1661 BTFIXUPSET_CALL(flush_cache_range, swift_flush_cache_range, BTFIXUPCALL_NORM);
1662
1663
1664 BTFIXUPSET_CALL(flush_tlb_all, swift_flush_tlb_all, BTFIXUPCALL_NORM);
1665 BTFIXUPSET_CALL(flush_tlb_mm, swift_flush_tlb_mm, BTFIXUPCALL_NORM);
1666 BTFIXUPSET_CALL(flush_tlb_page, swift_flush_tlb_page, BTFIXUPCALL_NORM);
1667 BTFIXUPSET_CALL(flush_tlb_range, swift_flush_tlb_range, BTFIXUPCALL_NORM);
1668
1669 BTFIXUPSET_CALL(__flush_page_to_ram, swift_flush_page_to_ram, BTFIXUPCALL_NORM);
1670 BTFIXUPSET_CALL(flush_sig_insns, swift_flush_sig_insns, BTFIXUPCALL_NORM);
1671 BTFIXUPSET_CALL(flush_page_for_dma, swift_flush_page_for_dma, BTFIXUPCALL_NORM);
1672
1673 BTFIXUPSET_CALL(update_mmu_cache, swift_update_mmu_cache, BTFIXUPCALL_NORM);
1674
1675 flush_page_for_dma_global = 0;
1676
1677 /*
1678 * Are you now convinced that the Swift is one of the
1679 * biggest VLSI abortions of all time? Bravo Fujitsu!
1680 * Fujitsu, the !#?!%$'d up processor people. I bet if
1681 * you examined the microcode of the Swift you'd find
1682 * XXX's all over the place.
1683 */
1684 poke_srmmu = poke_swift;
1685 }
1686
1687 static void turbosparc_flush_cache_all(void)
1688 {
1689 flush_user_windows();
1690 turbosparc_idflash_clear();
1691 }
1692
1693 static void turbosparc_flush_cache_mm(struct mm_struct *mm)
1694 {
1695 FLUSH_BEGIN(mm)
1696 flush_user_windows();
1697 turbosparc_idflash_clear();
1698 FLUSH_END
1699 }
1700
1701 static void turbosparc_flush_cache_range(struct vm_area_struct *vma, unsigned long start, unsigned long end)
1702 {
1703 FLUSH_BEGIN(vma->vm_mm)
1704 flush_user_windows();
1705 turbosparc_idflash_clear();
1706 FLUSH_END
1707 }
1708
1709 static void turbosparc_flush_cache_page(struct vm_area_struct *vma, unsigned long page)
1710 {
1711 FLUSH_BEGIN(vma->vm_mm)
1712 flush_user_windows();
1713 if (vma->vm_flags & VM_EXEC)
1714 turbosparc_flush_icache();
1715 turbosparc_flush_dcache();
1716 FLUSH_END
1717 }
1718
1719 /* TurboSparc is copy-back, if we turn it on, but this does not work. */
1720 static void turbosparc_flush_page_to_ram(unsigned long page)
1721 {
1722 #ifdef TURBOSPARC_WRITEBACK
1723 volatile unsigned long clear;
1724
1725 if (srmmu_hwprobe(page))
1726 turbosparc_flush_page_cache(page);
1727 clear = srmmu_get_fstatus();
1728 #endif
1729 }
1730
1731 static void turbosparc_flush_sig_insns(struct mm_struct *mm, unsigned long insn_addr)
1732 {
1733 }
1734
1735 static void turbosparc_flush_page_for_dma(unsigned long page)
1736 {
1737 turbosparc_flush_dcache();
1738 }
1739
1740 static void turbosparc_flush_tlb_all(void)
1741 {
1742 srmmu_flush_whole_tlb();
1743 }
1744
1745 static void turbosparc_flush_tlb_mm(struct mm_struct *mm)
1746 {
1747 FLUSH_BEGIN(mm)
1748 srmmu_flush_whole_tlb();
1749 FLUSH_END
1750 }
1751
1752 static void turbosparc_flush_tlb_range(struct vm_area_struct *vma, unsigned long start, unsigned long end)
1753 {
1754 FLUSH_BEGIN(vma->vm_mm)
1755 srmmu_flush_whole_tlb();
1756 FLUSH_END
1757 }
1758
1759 static void turbosparc_flush_tlb_page(struct vm_area_struct *vma, unsigned long page)
1760 {
1761 FLUSH_BEGIN(vma->vm_mm)
1762 srmmu_flush_whole_tlb();
1763 FLUSH_END
1764 }
1765
1766
1767 static void __init poke_turbosparc(void)
1768 {
1769 unsigned long mreg = srmmu_get_mmureg();
1770 unsigned long ccreg;
1771
1772 /* Clear any crap from the cache or else... */
1773 turbosparc_flush_cache_all();
1774 mreg &= ~(TURBOSPARC_ICENABLE | TURBOSPARC_DCENABLE); /* Temporarily disable I & D caches */
1775 mreg &= ~(TURBOSPARC_PCENABLE); /* Don't check parity */
1776 srmmu_set_mmureg(mreg);
1777
1778 ccreg = turbosparc_get_ccreg();
1779
1780 #ifdef TURBOSPARC_WRITEBACK
1781 ccreg |= (TURBOSPARC_SNENABLE); /* Do DVMA snooping in Dcache */
1782 ccreg &= ~(TURBOSPARC_uS2 | TURBOSPARC_WTENABLE);
1783 /* Write-back D-cache, emulate VLSI
1784 * abortion number three, not number one */
1785 #else
1786 /* For now let's play safe, optimize later */
1787 ccreg |= (TURBOSPARC_SNENABLE | TURBOSPARC_WTENABLE);
1788 /* Do DVMA snooping in Dcache, Write-thru D-cache */
1789 ccreg &= ~(TURBOSPARC_uS2);
1790 /* Emulate VLSI abortion number three, not number one */
1791 #endif
1792
1793 switch (ccreg & 7) {
1794 case 0: /* No SE cache */
1795 case 7: /* Test mode */
1796 break;
1797 default:
1798 ccreg |= (TURBOSPARC_SCENABLE);
1799 }
1800 turbosparc_set_ccreg (ccreg);
1801
1802 mreg |= (TURBOSPARC_ICENABLE | TURBOSPARC_DCENABLE); /* I & D caches on */
1803 mreg |= (TURBOSPARC_ICSNOOP); /* Icache snooping on */
1804 srmmu_set_mmureg(mreg);
1805 }
1806
1807 static void __init init_turbosparc(void)
1808 {
1809 srmmu_name = "Fujitsu TurboSparc";
1810 srmmu_modtype = TurboSparc;
1811
1812 BTFIXUPSET_CALL(flush_cache_all, turbosparc_flush_cache_all, BTFIXUPCALL_NORM);
1813 BTFIXUPSET_CALL(flush_cache_mm, turbosparc_flush_cache_mm, BTFIXUPCALL_NORM);
1814 BTFIXUPSET_CALL(flush_cache_page, turbosparc_flush_cache_page, BTFIXUPCALL_NORM);
1815 BTFIXUPSET_CALL(flush_cache_range, turbosparc_flush_cache_range, BTFIXUPCALL_NORM);
1816
1817 BTFIXUPSET_CALL(flush_tlb_all, turbosparc_flush_tlb_all, BTFIXUPCALL_NORM);
1818 BTFIXUPSET_CALL(flush_tlb_mm, turbosparc_flush_tlb_mm, BTFIXUPCALL_NORM);
1819 BTFIXUPSET_CALL(flush_tlb_page, turbosparc_flush_tlb_page, BTFIXUPCALL_NORM);
1820 BTFIXUPSET_CALL(flush_tlb_range, turbosparc_flush_tlb_range, BTFIXUPCALL_NORM);
1821
1822 BTFIXUPSET_CALL(__flush_page_to_ram, turbosparc_flush_page_to_ram, BTFIXUPCALL_NORM);
1823
1824 BTFIXUPSET_CALL(flush_sig_insns, turbosparc_flush_sig_insns, BTFIXUPCALL_NOP);
1825 BTFIXUPSET_CALL(flush_page_for_dma, turbosparc_flush_page_for_dma, BTFIXUPCALL_NORM);
1826
1827 poke_srmmu = poke_turbosparc;
1828 }
1829
1830 static void __init poke_tsunami(void)
1831 {
1832 unsigned long mreg = srmmu_get_mmureg();
1833
1834 tsunami_flush_icache();
1835 tsunami_flush_dcache();
1836 mreg &= ~TSUNAMI_ITD;
1837 mreg |= (TSUNAMI_IENAB | TSUNAMI_DENAB);
1838 srmmu_set_mmureg(mreg);
1839 }
1840
1841 static void __init init_tsunami(void)
1842 {
1843 /*
1844 * Tsunami's pretty sane, Sun and TI actually got it
1845 * somewhat right this time. Fujitsu should have
1846 * taken some lessons from them.
1847 */
1848
1849 srmmu_name = "TI Tsunami";
1850 srmmu_modtype = Tsunami;
1851
1852 BTFIXUPSET_CALL(flush_cache_all, tsunami_flush_cache_all, BTFIXUPCALL_NORM);
1853 BTFIXUPSET_CALL(flush_cache_mm, tsunami_flush_cache_mm, BTFIXUPCALL_NORM);
1854 BTFIXUPSET_CALL(flush_cache_page, tsunami_flush_cache_page, BTFIXUPCALL_NORM);
1855 BTFIXUPSET_CALL(flush_cache_range, tsunami_flush_cache_range, BTFIXUPCALL_NORM);
1856
1857
1858 BTFIXUPSET_CALL(flush_tlb_all, tsunami_flush_tlb_all, BTFIXUPCALL_NORM);
1859 BTFIXUPSET_CALL(flush_tlb_mm, tsunami_flush_tlb_mm, BTFIXUPCALL_NORM);
1860 BTFIXUPSET_CALL(flush_tlb_page, tsunami_flush_tlb_page, BTFIXUPCALL_NORM);
1861 BTFIXUPSET_CALL(flush_tlb_range, tsunami_flush_tlb_range, BTFIXUPCALL_NORM);
1862
1863 BTFIXUPSET_CALL(__flush_page_to_ram, tsunami_flush_page_to_ram, BTFIXUPCALL_NOP);
1864 BTFIXUPSET_CALL(flush_sig_insns, tsunami_flush_sig_insns, BTFIXUPCALL_NORM);
1865 BTFIXUPSET_CALL(flush_page_for_dma, tsunami_flush_page_for_dma, BTFIXUPCALL_NORM);
1866
1867 poke_srmmu = poke_tsunami;
1868
1869 tsunami_setup_blockops();
1870 }
1871
1872 static void __init poke_viking(void)
1873 {
1874 unsigned long mreg = srmmu_get_mmureg();
1875 static int smp_catch;
1876
1877 if(viking_mxcc_present) {
1878 unsigned long mxcc_control = mxcc_get_creg();
1879
1880 mxcc_control |= (MXCC_CTL_ECE | MXCC_CTL_PRE | MXCC_CTL_MCE);
1881 mxcc_control &= ~(MXCC_CTL_RRC);
1882 mxcc_set_creg(mxcc_control);
1883
1884 /*
1885 * We don't need memory parity checks.
1886 * XXX This is a mess, have to dig out later. ecd.
1887 viking_mxcc_turn_off_parity(&mreg, &mxcc_control);
1888 */
1889
1890 /* We do cache ptables on MXCC. */
1891 mreg |= VIKING_TCENABLE;
1892 } else {
1893 unsigned long bpreg;
1894
1895 mreg &= ~(VIKING_TCENABLE);
1896 if(smp_catch++) {
1897 /* Must disable mixed-cmd mode here for other cpu's. */
1898 bpreg = viking_get_bpreg();
1899 bpreg &= ~(VIKING_ACTION_MIX);
1900 viking_set_bpreg(bpreg);
1901
1902 /* Just in case PROM does something funny. */
1903 msi_set_sync();
1904 }
1905 }
1906
1907 mreg |= VIKING_SPENABLE;
1908 mreg |= (VIKING_ICENABLE | VIKING_DCENABLE);
1909 mreg |= VIKING_SBENABLE;
1910 mreg &= ~(VIKING_ACENABLE);
1911 srmmu_set_mmureg(mreg);
1912
1913 #ifdef CONFIG_SMP
1914 /* Avoid unnecessary cross calls. */
1915 BTFIXUPCOPY_CALL(flush_cache_all, local_flush_cache_all);
1916 BTFIXUPCOPY_CALL(flush_cache_mm, local_flush_cache_mm);
1917 BTFIXUPCOPY_CALL(flush_cache_range, local_flush_cache_range);
1918 BTFIXUPCOPY_CALL(flush_cache_page, local_flush_cache_page);
1919 BTFIXUPCOPY_CALL(__flush_page_to_ram, local_flush_page_to_ram);
1920 BTFIXUPCOPY_CALL(flush_sig_insns, local_flush_sig_insns);
1921 BTFIXUPCOPY_CALL(flush_page_for_dma, local_flush_page_for_dma);
1922 btfixup();
1923 #endif
1924 }
1925
1926 static void __init init_viking(void)
1927 {
1928 unsigned long mreg = srmmu_get_mmureg();
1929
1930 /* Ahhh, the viking. SRMMU VLSI abortion number two... */
1931 if(mreg & VIKING_MMODE) {
1932 srmmu_name = "TI Viking";
1933 viking_mxcc_present = 0;
1934 msi_set_sync();
1935
1936 BTFIXUPSET_CALL(pte_clear, srmmu_pte_clear, BTFIXUPCALL_NORM);
1937 BTFIXUPSET_CALL(pmd_clear, srmmu_pmd_clear, BTFIXUPCALL_NORM);
1938 BTFIXUPSET_CALL(pgd_clear, srmmu_pgd_clear, BTFIXUPCALL_NORM);
1939
1940 /*
1941 * We need this to make sure old viking takes no hits
1942 * on it's cache for dma snoops to workaround the
1943 * "load from non-cacheable memory" interrupt bug.
1944 * This is only necessary because of the new way in
1945 * which we use the IOMMU.
1946 */
1947 BTFIXUPSET_CALL(flush_page_for_dma, viking_flush_page, BTFIXUPCALL_NORM);
1948
1949 flush_page_for_dma_global = 0;
1950 } else {
1951 srmmu_name = "TI Viking/MXCC";
1952 viking_mxcc_present = 1;
1953
1954 srmmu_cache_pagetables = 1;
1955
1956 /* MXCC vikings lack the DMA snooping bug. */
1957 BTFIXUPSET_CALL(flush_page_for_dma, viking_flush_page_for_dma, BTFIXUPCALL_NOP);
1958 }
1959
1960 BTFIXUPSET_CALL(flush_cache_all, viking_flush_cache_all, BTFIXUPCALL_NORM);
1961 BTFIXUPSET_CALL(flush_cache_mm, viking_flush_cache_mm, BTFIXUPCALL_NORM);
1962 BTFIXUPSET_CALL(flush_cache_page, viking_flush_cache_page, BTFIXUPCALL_NORM);
1963 BTFIXUPSET_CALL(flush_cache_range, viking_flush_cache_range, BTFIXUPCALL_NORM);
1964
1965 #ifdef CONFIG_SMP
1966 if (sparc_cpu_model == sun4d) {
1967 BTFIXUPSET_CALL(flush_tlb_all, sun4dsmp_flush_tlb_all, BTFIXUPCALL_NORM);
1968 BTFIXUPSET_CALL(flush_tlb_mm, sun4dsmp_flush_tlb_mm, BTFIXUPCALL_NORM);
1969 BTFIXUPSET_CALL(flush_tlb_page, sun4dsmp_flush_tlb_page, BTFIXUPCALL_NORM);
1970 BTFIXUPSET_CALL(flush_tlb_range, sun4dsmp_flush_tlb_range, BTFIXUPCALL_NORM);
1971 } else
1972 #endif
1973 {
1974 BTFIXUPSET_CALL(flush_tlb_all, viking_flush_tlb_all, BTFIXUPCALL_NORM);
1975 BTFIXUPSET_CALL(flush_tlb_mm, viking_flush_tlb_mm, BTFIXUPCALL_NORM);
1976 BTFIXUPSET_CALL(flush_tlb_page, viking_flush_tlb_page, BTFIXUPCALL_NORM);
1977 BTFIXUPSET_CALL(flush_tlb_range, viking_flush_tlb_range, BTFIXUPCALL_NORM);
1978 }
1979
1980 BTFIXUPSET_CALL(__flush_page_to_ram, viking_flush_page_to_ram, BTFIXUPCALL_NOP);
1981 BTFIXUPSET_CALL(flush_sig_insns, viking_flush_sig_insns, BTFIXUPCALL_NOP);
1982
1983 poke_srmmu = poke_viking;
1984 }
1985
1986 /* Probe for the srmmu chip version. */
1987 static void __init get_srmmu_type(void)
1988 {
1989 unsigned long mreg, psr;
1990 unsigned long mod_typ, mod_rev, psr_typ, psr_vers;
1991
1992 srmmu_modtype = SRMMU_INVAL_MOD;
1993 hwbug_bitmask = 0;
1994
1995 mreg = srmmu_get_mmureg(); psr = get_psr();
1996 mod_typ = (mreg & 0xf0000000) >> 28;
1997 mod_rev = (mreg & 0x0f000000) >> 24;
1998 psr_typ = (psr >> 28) & 0xf;
1999 psr_vers = (psr >> 24) & 0xf;
2000
2001 /* First, check for HyperSparc or Cypress. */
2002 if(mod_typ == 1) {
2003 switch(mod_rev) {
2004 case 7:
2005 /* UP or MP Hypersparc */
2006 init_hypersparc();
2007 break;
2008 case 0:
2009 case 2:
2010 /* Uniprocessor Cypress */
2011 init_cypress_604();
2012 break;
2013 case 10:
2014 case 11:
2015 case 12:
2016 /* _REALLY OLD_ Cypress MP chips... */
2017 case 13:
2018 case 14:
2019 case 15:
2020 /* MP Cypress mmu/cache-controller */
2021 init_cypress_605(mod_rev);
2022 break;
2023 default:
2024 /* Some other Cypress revision, assume a 605. */
2025 init_cypress_605(mod_rev);
2026 break;
2027 };
2028 return;
2029 }
2030
2031 /*
2032 * Now Fujitsu TurboSparc. It might happen that it is
2033 * in Swift emulation mode, so we will check later...
2034 */
2035 if (psr_typ == 0 && psr_vers == 5) {
2036 init_turbosparc();
2037 return;
2038 }
2039
2040 /* Next check for Fujitsu Swift. */
2041 if(psr_typ == 0 && psr_vers == 4) {
2042 int cpunode;
2043 char node_str[128];
2044
2045 /* Look if it is not a TurboSparc emulating Swift... */
2046 cpunode = prom_getchild(prom_root_node);
2047 while((cpunode = prom_getsibling(cpunode)) != 0) {
2048 prom_getstring(cpunode, "device_type", node_str, sizeof(node_str));
2049 if(!strcmp(node_str, "cpu")) {
2050 if (!prom_getintdefault(cpunode, "psr-implementation", 1) &&
2051 prom_getintdefault(cpunode, "psr-version", 1) == 5) {
2052 init_turbosparc();
2053 return;
2054 }
2055 break;
2056 }
2057 }
2058
2059 init_swift();
2060 return;
2061 }
2062
2063 /* Now the Viking family of srmmu. */
2064 if(psr_typ == 4 &&
2065 ((psr_vers == 0) ||
2066 ((psr_vers == 1) && (mod_typ == 0) && (mod_rev == 0)))) {
2067 init_viking();
2068 return;
2069 }
2070
2071 /* Finally the Tsunami. */
2072 if(psr_typ == 4 && psr_vers == 1 && (mod_typ || mod_rev)) {
2073 init_tsunami();
2074 return;
2075 }
2076
2077 /* Oh well */
2078 srmmu_is_bad();
2079 }
2080
2081 /* don't laugh, static pagetables */
2082 static void srmmu_check_pgt_cache(int low, int high)
2083 {
2084 }
2085
2086 extern unsigned long spwin_mmu_patchme, fwin_mmu_patchme,
2087 tsetup_mmu_patchme, rtrap_mmu_patchme;
2088
2089 extern unsigned long spwin_srmmu_stackchk, srmmu_fwin_stackchk,
2090 tsetup_srmmu_stackchk, srmmu_rett_stackchk;
2091
2092 extern unsigned long srmmu_fault;
2093
2094 #define PATCH_BRANCH(insn, dest) do { \
2095 iaddr = &(insn); \
2096 daddr = &(dest); \
2097 *iaddr = SPARC_BRANCH((unsigned long) daddr, (unsigned long) iaddr); \
2098 } while(0)
2099
2100 static void __init patch_window_trap_handlers(void)
2101 {
2102 unsigned long *iaddr, *daddr;
2103
2104 PATCH_BRANCH(spwin_mmu_patchme, spwin_srmmu_stackchk);
2105 PATCH_BRANCH(fwin_mmu_patchme, srmmu_fwin_stackchk);
2106 PATCH_BRANCH(tsetup_mmu_patchme, tsetup_srmmu_stackchk);
2107 PATCH_BRANCH(rtrap_mmu_patchme, srmmu_rett_stackchk);
2108 PATCH_BRANCH(sparc_ttable[SP_TRAP_TFLT].inst_three, srmmu_fault);
2109 PATCH_BRANCH(sparc_ttable[SP_TRAP_DFLT].inst_three, srmmu_fault);
2110 PATCH_BRANCH(sparc_ttable[SP_TRAP_DACC].inst_three, srmmu_fault);
2111 }
2112
2113 #ifdef CONFIG_SMP
2114 /* Local cross-calls. */
2115 static void smp_flush_page_for_dma(unsigned long page)
2116 {
2117 xc1((smpfunc_t) BTFIXUP_CALL(local_flush_page_for_dma), page);
2118 local_flush_page_for_dma(page);
2119 }
2120
2121 #endif
2122
2123 static pte_t srmmu_pgoff_to_pte(unsigned long pgoff)
2124 {
2125 return __pte((pgoff << SRMMU_PTE_FILE_SHIFT) | SRMMU_FILE);
2126 }
2127
2128 static unsigned long srmmu_pte_to_pgoff(pte_t pte)
2129 {
2130 return pte_val(pte) >> SRMMU_PTE_FILE_SHIFT;
2131 }
2132
2133 /* Load up routines and constants for sun4m and sun4d mmu */
2134 void __init ld_mmu_srmmu(void)
2135 {
2136 extern void ld_mmu_iommu(void);
2137 extern void ld_mmu_iounit(void);
2138 extern void ___xchg32_sun4md(void);
2139
2140 BTFIXUPSET_SIMM13(pgdir_shift, SRMMU_PGDIR_SHIFT);
2141 BTFIXUPSET_SETHI(pgdir_size, SRMMU_PGDIR_SIZE);
2142 BTFIXUPSET_SETHI(pgdir_mask, SRMMU_PGDIR_MASK);
2143
2144 BTFIXUPSET_SIMM13(ptrs_per_pmd, SRMMU_PTRS_PER_PMD);
2145 BTFIXUPSET_SIMM13(ptrs_per_pgd, SRMMU_PTRS_PER_PGD);
2146
2147 BTFIXUPSET_INT(page_none, pgprot_val(SRMMU_PAGE_NONE));
2148 BTFIXUPSET_INT(page_shared, pgprot_val(SRMMU_PAGE_SHARED));
2149 BTFIXUPSET_INT(page_copy, pgprot_val(SRMMU_PAGE_COPY));
2150 BTFIXUPSET_INT(page_readonly, pgprot_val(SRMMU_PAGE_RDONLY));
2151 BTFIXUPSET_INT(page_kernel, pgprot_val(SRMMU_PAGE_KERNEL));
2152 page_kernel = pgprot_val(SRMMU_PAGE_KERNEL);
2153 pg_iobits = SRMMU_VALID | SRMMU_WRITE | SRMMU_REF;
2154
2155 /* Functions */
2156 #ifndef CONFIG_SMP
2157 BTFIXUPSET_CALL(___xchg32, ___xchg32_sun4md, BTFIXUPCALL_SWAPG1G2);
2158 #endif
2159 BTFIXUPSET_CALL(do_check_pgt_cache, srmmu_check_pgt_cache, BTFIXUPCALL_NOP);
2160
2161 BTFIXUPSET_CALL(set_pte, srmmu_set_pte, BTFIXUPCALL_SWAPO0O1);
2162 BTFIXUPSET_CALL(switch_mm, srmmu_switch_mm, BTFIXUPCALL_NORM);
2163
2164 BTFIXUPSET_CALL(pte_pfn, srmmu_pte_pfn, BTFIXUPCALL_NORM);
2165 BTFIXUPSET_CALL(pmd_page, srmmu_pmd_page, BTFIXUPCALL_NORM);
2166 BTFIXUPSET_CALL(pgd_page, srmmu_pgd_page, BTFIXUPCALL_NORM);
2167
2168 BTFIXUPSET_SETHI(none_mask, 0xF0000000);
2169
2170 BTFIXUPSET_CALL(pte_present, srmmu_pte_present, BTFIXUPCALL_NORM);
2171 BTFIXUPSET_CALL(pte_clear, srmmu_pte_clear, BTFIXUPCALL_SWAPO0G0);
2172 BTFIXUPSET_CALL(pte_read, srmmu_pte_read, BTFIXUPCALL_NORM);
2173
2174 BTFIXUPSET_CALL(pmd_bad, srmmu_pmd_bad, BTFIXUPCALL_NORM);
2175 BTFIXUPSET_CALL(pmd_present, srmmu_pmd_present, BTFIXUPCALL_NORM);
2176 BTFIXUPSET_CALL(pmd_clear, srmmu_pmd_clear, BTFIXUPCALL_SWAPO0G0);
2177
2178 BTFIXUPSET_CALL(pgd_none, srmmu_pgd_none, BTFIXUPCALL_NORM);
2179 BTFIXUPSET_CALL(pgd_bad, srmmu_pgd_bad, BTFIXUPCALL_NORM);
2180 BTFIXUPSET_CALL(pgd_present, srmmu_pgd_present, BTFIXUPCALL_NORM);
2181 BTFIXUPSET_CALL(pgd_clear, srmmu_pgd_clear, BTFIXUPCALL_SWAPO0G0);
2182
2183 BTFIXUPSET_CALL(mk_pte, srmmu_mk_pte, BTFIXUPCALL_NORM);
2184 BTFIXUPSET_CALL(mk_pte_phys, srmmu_mk_pte_phys, BTFIXUPCALL_NORM);
2185 BTFIXUPSET_CALL(mk_pte_io, srmmu_mk_pte_io, BTFIXUPCALL_NORM);
2186 BTFIXUPSET_CALL(pgd_set, srmmu_pgd_set, BTFIXUPCALL_NORM);
2187 BTFIXUPSET_CALL(pmd_set, srmmu_pmd_set, BTFIXUPCALL_NORM);
2188 BTFIXUPSET_CALL(pmd_populate, srmmu_pmd_populate, BTFIXUPCALL_NORM);
2189
2190 BTFIXUPSET_INT(pte_modify_mask, SRMMU_CHG_MASK);
2191 BTFIXUPSET_CALL(pmd_offset, srmmu_pmd_offset, BTFIXUPCALL_NORM);
2192 BTFIXUPSET_CALL(pte_offset_kernel, srmmu_pte_offset, BTFIXUPCALL_NORM);
2193
2194 BTFIXUPSET_CALL(free_pte_fast, srmmu_free_pte_fast, BTFIXUPCALL_NORM);
2195 BTFIXUPSET_CALL(pte_free, srmmu_pte_free, BTFIXUPCALL_NORM);
2196 BTFIXUPSET_CALL(pte_alloc_one_kernel, srmmu_pte_alloc_one_kernel, BTFIXUPCALL_NORM);
2197 BTFIXUPSET_CALL(pte_alloc_one, srmmu_pte_alloc_one, BTFIXUPCALL_NORM);
2198 BTFIXUPSET_CALL(free_pmd_fast, srmmu_pmd_free, BTFIXUPCALL_NORM);
2199 BTFIXUPSET_CALL(pmd_alloc_one, srmmu_pmd_alloc_one, BTFIXUPCALL_NORM);
2200 BTFIXUPSET_CALL(free_pgd_fast, srmmu_free_pgd_fast, BTFIXUPCALL_NORM);
2201 BTFIXUPSET_CALL(get_pgd_fast, srmmu_get_pgd_fast, BTFIXUPCALL_NORM);
2202
2203 BTFIXUPSET_HALF(pte_writei, SRMMU_WRITE);
2204 BTFIXUPSET_HALF(pte_dirtyi, SRMMU_DIRTY);
2205 BTFIXUPSET_HALF(pte_youngi, SRMMU_REF);
2206 BTFIXUPSET_HALF(pte_filei, SRMMU_FILE);
2207 BTFIXUPSET_HALF(pte_wrprotecti, SRMMU_WRITE);
2208 BTFIXUPSET_HALF(pte_mkcleani, SRMMU_DIRTY);
2209 BTFIXUPSET_HALF(pte_mkoldi, SRMMU_REF);
2210 BTFIXUPSET_CALL(pte_mkwrite, srmmu_pte_mkwrite, BTFIXUPCALL_ORINT(SRMMU_WRITE));
2211 BTFIXUPSET_CALL(pte_mkdirty, srmmu_pte_mkdirty, BTFIXUPCALL_ORINT(SRMMU_DIRTY));
2212 BTFIXUPSET_CALL(pte_mkyoung, srmmu_pte_mkyoung, BTFIXUPCALL_ORINT(SRMMU_REF));
2213 BTFIXUPSET_CALL(update_mmu_cache, srmmu_update_mmu_cache, BTFIXUPCALL_NOP);
2214 BTFIXUPSET_CALL(destroy_context, srmmu_destroy_context, BTFIXUPCALL_NORM);
2215
2216 BTFIXUPSET_CALL(sparc_mapiorange, srmmu_mapiorange, BTFIXUPCALL_NORM);
2217 BTFIXUPSET_CALL(sparc_unmapiorange, srmmu_unmapiorange, BTFIXUPCALL_NORM);
2218
2219 BTFIXUPSET_CALL(__swp_type, srmmu_swp_type, BTFIXUPCALL_NORM);
2220 BTFIXUPSET_CALL(__swp_offset, srmmu_swp_offset, BTFIXUPCALL_NORM);
2221 BTFIXUPSET_CALL(__swp_entry, srmmu_swp_entry, BTFIXUPCALL_NORM);
2222
2223 BTFIXUPSET_CALL(mmu_info, srmmu_mmu_info, BTFIXUPCALL_NORM);
2224
2225 BTFIXUPSET_CALL(alloc_thread_info, srmmu_alloc_thread_info, BTFIXUPCALL_NORM);
2226 BTFIXUPSET_CALL(free_thread_info, srmmu_free_thread_info, BTFIXUPCALL_NORM);
2227
2228 BTFIXUPSET_CALL(pte_to_pgoff, srmmu_pte_to_pgoff, BTFIXUPCALL_NORM);
2229 BTFIXUPSET_CALL(pgoff_to_pte, srmmu_pgoff_to_pte, BTFIXUPCALL_NORM);
2230
2231 get_srmmu_type();
2232 patch_window_trap_handlers();
2233
2234 #ifdef CONFIG_SMP
2235 /* El switcheroo... */
2236
2237 BTFIXUPCOPY_CALL(local_flush_cache_all, flush_cache_all);
2238 BTFIXUPCOPY_CALL(local_flush_cache_mm, flush_cache_mm);
2239 BTFIXUPCOPY_CALL(local_flush_cache_range, flush_cache_range);
2240 BTFIXUPCOPY_CALL(local_flush_cache_page, flush_cache_page);
2241 BTFIXUPCOPY_CALL(local_flush_tlb_all, flush_tlb_all);
2242 BTFIXUPCOPY_CALL(local_flush_tlb_mm, flush_tlb_mm);
2243 BTFIXUPCOPY_CALL(local_flush_tlb_range, flush_tlb_range);
2244 BTFIXUPCOPY_CALL(local_flush_tlb_page, flush_tlb_page);
2245 BTFIXUPCOPY_CALL(local_flush_page_to_ram, __flush_page_to_ram);
2246 BTFIXUPCOPY_CALL(local_flush_sig_insns, flush_sig_insns);
2247 BTFIXUPCOPY_CALL(local_flush_page_for_dma, flush_page_for_dma);
2248
2249 BTFIXUPSET_CALL(flush_cache_all, smp_flush_cache_all, BTFIXUPCALL_NORM);
2250 BTFIXUPSET_CALL(flush_cache_mm, smp_flush_cache_mm, BTFIXUPCALL_NORM);
2251 BTFIXUPSET_CALL(flush_cache_range, smp_flush_cache_range, BTFIXUPCALL_NORM);
2252 BTFIXUPSET_CALL(flush_cache_page, smp_flush_cache_page, BTFIXUPCALL_NORM);
2253 if (sparc_cpu_model != sun4d) {
2254 BTFIXUPSET_CALL(flush_tlb_all, smp_flush_tlb_all, BTFIXUPCALL_NORM);
2255 BTFIXUPSET_CALL(flush_tlb_mm, smp_flush_tlb_mm, BTFIXUPCALL_NORM);
2256 BTFIXUPSET_CALL(flush_tlb_range, smp_flush_tlb_range, BTFIXUPCALL_NORM);
2257 BTFIXUPSET_CALL(flush_tlb_page, smp_flush_tlb_page, BTFIXUPCALL_NORM);
2258 }
2259 BTFIXUPSET_CALL(__flush_page_to_ram, smp_flush_page_to_ram, BTFIXUPCALL_NORM);
2260 BTFIXUPSET_CALL(flush_sig_insns, smp_flush_sig_insns, BTFIXUPCALL_NORM);
2261 BTFIXUPSET_CALL(flush_page_for_dma, smp_flush_page_for_dma, BTFIXUPCALL_NORM);
2262 #endif
2263
2264 if (sparc_cpu_model == sun4d)
2265 ld_mmu_iounit();
2266 else
2267 ld_mmu_iommu();
2268 #ifdef CONFIG_SMP
2269 if (sparc_cpu_model == sun4d)
2270 sun4d_init_smp();
2271 else
2272 sun4m_init_smp();
2273 #endif
2274 }
Community contributions to the Openmoko Kernel