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1da177e4 LT |
1 | /* $Id: init.c,v 1.209 2002/02/09 19:49:31 davem Exp $ |
2 | * arch/sparc64/mm/init.c | |
3 | * | |
4 | * Copyright (C) 1996-1999 David S. Miller (davem@caip.rutgers.edu) | |
5 | * Copyright (C) 1997-1999 Jakub Jelinek (jj@sunsite.mff.cuni.cz) | |
6 | */ | |
7 | ||
8 | #include <linux/config.h> | |
c4bce90e | 9 | #include <linux/module.h> |
1da177e4 LT |
10 | #include <linux/kernel.h> |
11 | #include <linux/sched.h> | |
12 | #include <linux/string.h> | |
13 | #include <linux/init.h> | |
14 | #include <linux/bootmem.h> | |
15 | #include <linux/mm.h> | |
16 | #include <linux/hugetlb.h> | |
17 | #include <linux/slab.h> | |
18 | #include <linux/initrd.h> | |
19 | #include <linux/swap.h> | |
20 | #include <linux/pagemap.h> | |
21 | #include <linux/fs.h> | |
22 | #include <linux/seq_file.h> | |
05e14cb3 | 23 | #include <linux/kprobes.h> |
1ac4f5eb | 24 | #include <linux/cache.h> |
13edad7a | 25 | #include <linux/sort.h> |
1da177e4 LT |
26 | |
27 | #include <asm/head.h> | |
28 | #include <asm/system.h> | |
29 | #include <asm/page.h> | |
30 | #include <asm/pgalloc.h> | |
31 | #include <asm/pgtable.h> | |
32 | #include <asm/oplib.h> | |
33 | #include <asm/iommu.h> | |
34 | #include <asm/io.h> | |
35 | #include <asm/uaccess.h> | |
36 | #include <asm/mmu_context.h> | |
37 | #include <asm/tlbflush.h> | |
38 | #include <asm/dma.h> | |
39 | #include <asm/starfire.h> | |
40 | #include <asm/tlb.h> | |
41 | #include <asm/spitfire.h> | |
42 | #include <asm/sections.h> | |
517af332 | 43 | #include <asm/tsb.h> |
481295f9 | 44 | #include <asm/hypervisor.h> |
1da177e4 LT |
45 | |
46 | extern void device_scan(void); | |
47 | ||
9cc3a1ac DM |
48 | #define MAX_PHYS_ADDRESS (1UL << 42UL) |
49 | #define KPTE_BITMAP_CHUNK_SZ (256UL * 1024UL * 1024UL) | |
50 | #define KPTE_BITMAP_BYTES \ | |
51 | ((MAX_PHYS_ADDRESS / KPTE_BITMAP_CHUNK_SZ) / 8) | |
52 | ||
53 | unsigned long kern_linear_pte_xor[2] __read_mostly; | |
54 | ||
55 | /* A bitmap, one bit for every 256MB of physical memory. If the bit | |
56 | * is clear, we should use a 4MB page (via kern_linear_pte_xor[0]) else | |
57 | * if set we should use a 256MB page (via kern_linear_pte_xor[1]). | |
58 | */ | |
59 | unsigned long kpte_linear_bitmap[KPTE_BITMAP_BYTES / sizeof(unsigned long)]; | |
60 | ||
d7744a09 DM |
61 | /* A special kernel TSB for 4MB and 256MB linear mappings. */ |
62 | struct tsb swapper_4m_tsb[KERNEL_TSB4M_NENTRIES]; | |
63 | ||
13edad7a DM |
64 | #define MAX_BANKS 32 |
65 | ||
66 | static struct linux_prom64_registers pavail[MAX_BANKS] __initdata; | |
67 | static struct linux_prom64_registers pavail_rescan[MAX_BANKS] __initdata; | |
68 | static int pavail_ents __initdata; | |
69 | static int pavail_rescan_ents __initdata; | |
70 | ||
71 | static int cmp_p64(const void *a, const void *b) | |
72 | { | |
73 | const struct linux_prom64_registers *x = a, *y = b; | |
74 | ||
75 | if (x->phys_addr > y->phys_addr) | |
76 | return 1; | |
77 | if (x->phys_addr < y->phys_addr) | |
78 | return -1; | |
79 | return 0; | |
80 | } | |
81 | ||
82 | static void __init read_obp_memory(const char *property, | |
83 | struct linux_prom64_registers *regs, | |
84 | int *num_ents) | |
85 | { | |
86 | int node = prom_finddevice("/memory"); | |
87 | int prop_size = prom_getproplen(node, property); | |
88 | int ents, ret, i; | |
89 | ||
90 | ents = prop_size / sizeof(struct linux_prom64_registers); | |
91 | if (ents > MAX_BANKS) { | |
92 | prom_printf("The machine has more %s property entries than " | |
93 | "this kernel can support (%d).\n", | |
94 | property, MAX_BANKS); | |
95 | prom_halt(); | |
96 | } | |
97 | ||
98 | ret = prom_getproperty(node, property, (char *) regs, prop_size); | |
99 | if (ret == -1) { | |
100 | prom_printf("Couldn't get %s property from /memory.\n"); | |
101 | prom_halt(); | |
102 | } | |
103 | ||
104 | *num_ents = ents; | |
10147570 | 105 | |
13edad7a DM |
106 | /* Sanitize what we got from the firmware, by page aligning |
107 | * everything. | |
108 | */ | |
109 | for (i = 0; i < ents; i++) { | |
110 | unsigned long base, size; | |
111 | ||
112 | base = regs[i].phys_addr; | |
113 | size = regs[i].reg_size; | |
10147570 | 114 | |
13edad7a DM |
115 | size &= PAGE_MASK; |
116 | if (base & ~PAGE_MASK) { | |
117 | unsigned long new_base = PAGE_ALIGN(base); | |
118 | ||
119 | size -= new_base - base; | |
120 | if ((long) size < 0L) | |
121 | size = 0UL; | |
122 | base = new_base; | |
123 | } | |
124 | regs[i].phys_addr = base; | |
125 | regs[i].reg_size = size; | |
126 | } | |
c9c10830 | 127 | sort(regs, ents, sizeof(struct linux_prom64_registers), |
13edad7a DM |
128 | cmp_p64, NULL); |
129 | } | |
1da177e4 | 130 | |
2bdb3cb2 | 131 | unsigned long *sparc64_valid_addr_bitmap __read_mostly; |
1da177e4 LT |
132 | |
133 | /* Ugly, but necessary... -DaveM */ | |
1ac4f5eb DM |
134 | unsigned long phys_base __read_mostly; |
135 | unsigned long kern_base __read_mostly; | |
136 | unsigned long kern_size __read_mostly; | |
137 | unsigned long pfn_base __read_mostly; | |
1da177e4 | 138 | |
1da177e4 LT |
139 | /* get_new_mmu_context() uses "cache + 1". */ |
140 | DEFINE_SPINLOCK(ctx_alloc_lock); | |
141 | unsigned long tlb_context_cache = CTX_FIRST_VERSION - 1; | |
142 | #define CTX_BMAP_SLOTS (1UL << (CTX_NR_BITS - 6)) | |
143 | unsigned long mmu_context_bmap[CTX_BMAP_SLOTS]; | |
144 | ||
145 | /* References to special section boundaries */ | |
146 | extern char _start[], _end[]; | |
147 | ||
148 | /* Initial ramdisk setup */ | |
149 | extern unsigned long sparc_ramdisk_image64; | |
150 | extern unsigned int sparc_ramdisk_image; | |
151 | extern unsigned int sparc_ramdisk_size; | |
152 | ||
1ac4f5eb | 153 | struct page *mem_map_zero __read_mostly; |
1da177e4 | 154 | |
0835ae0f DM |
155 | unsigned int sparc64_highest_unlocked_tlb_ent __read_mostly; |
156 | ||
157 | unsigned long sparc64_kern_pri_context __read_mostly; | |
158 | unsigned long sparc64_kern_pri_nuc_bits __read_mostly; | |
159 | unsigned long sparc64_kern_sec_context __read_mostly; | |
160 | ||
1da177e4 LT |
161 | int bigkernel = 0; |
162 | ||
3c936465 | 163 | kmem_cache_t *pgtable_cache __read_mostly; |
1da177e4 | 164 | |
3c936465 DM |
165 | static void zero_ctor(void *addr, kmem_cache_t *cache, unsigned long flags) |
166 | { | |
167 | clear_page(addr); | |
168 | } | |
05e28f9d | 169 | |
3c936465 | 170 | void pgtable_cache_init(void) |
1da177e4 | 171 | { |
3c936465 DM |
172 | pgtable_cache = kmem_cache_create("pgtable_cache", |
173 | PAGE_SIZE, PAGE_SIZE, | |
174 | SLAB_HWCACHE_ALIGN | | |
175 | SLAB_MUST_HWCACHE_ALIGN, | |
176 | zero_ctor, | |
177 | NULL); | |
178 | if (!pgtable_cache) { | |
179 | prom_printf("pgtable_cache_init(): Could not create!\n"); | |
180 | prom_halt(); | |
1da177e4 | 181 | } |
1da177e4 LT |
182 | } |
183 | ||
184 | #ifdef CONFIG_DEBUG_DCFLUSH | |
185 | atomic_t dcpage_flushes = ATOMIC_INIT(0); | |
186 | #ifdef CONFIG_SMP | |
187 | atomic_t dcpage_flushes_xcall = ATOMIC_INIT(0); | |
188 | #endif | |
189 | #endif | |
190 | ||
7a591cfe | 191 | inline void flush_dcache_page_impl(struct page *page) |
1da177e4 | 192 | { |
7a591cfe | 193 | BUG_ON(tlb_type == hypervisor); |
1da177e4 LT |
194 | #ifdef CONFIG_DEBUG_DCFLUSH |
195 | atomic_inc(&dcpage_flushes); | |
196 | #endif | |
197 | ||
198 | #ifdef DCACHE_ALIASING_POSSIBLE | |
199 | __flush_dcache_page(page_address(page), | |
200 | ((tlb_type == spitfire) && | |
201 | page_mapping(page) != NULL)); | |
202 | #else | |
203 | if (page_mapping(page) != NULL && | |
204 | tlb_type == spitfire) | |
205 | __flush_icache_page(__pa(page_address(page))); | |
206 | #endif | |
207 | } | |
208 | ||
209 | #define PG_dcache_dirty PG_arch_1 | |
48b0e548 DM |
210 | #define PG_dcache_cpu_shift 24 |
211 | #define PG_dcache_cpu_mask (256 - 1) | |
212 | ||
213 | #if NR_CPUS > 256 | |
214 | #error D-cache dirty tracking and thread_info->cpu need fixing for > 256 cpus | |
215 | #endif | |
1da177e4 LT |
216 | |
217 | #define dcache_dirty_cpu(page) \ | |
48b0e548 | 218 | (((page)->flags >> PG_dcache_cpu_shift) & PG_dcache_cpu_mask) |
1da177e4 LT |
219 | |
220 | static __inline__ void set_dcache_dirty(struct page *page, int this_cpu) | |
221 | { | |
222 | unsigned long mask = this_cpu; | |
48b0e548 DM |
223 | unsigned long non_cpu_bits; |
224 | ||
225 | non_cpu_bits = ~(PG_dcache_cpu_mask << PG_dcache_cpu_shift); | |
226 | mask = (mask << PG_dcache_cpu_shift) | (1UL << PG_dcache_dirty); | |
227 | ||
1da177e4 LT |
228 | __asm__ __volatile__("1:\n\t" |
229 | "ldx [%2], %%g7\n\t" | |
230 | "and %%g7, %1, %%g1\n\t" | |
231 | "or %%g1, %0, %%g1\n\t" | |
232 | "casx [%2], %%g7, %%g1\n\t" | |
233 | "cmp %%g7, %%g1\n\t" | |
b445e26c | 234 | "membar #StoreLoad | #StoreStore\n\t" |
1da177e4 | 235 | "bne,pn %%xcc, 1b\n\t" |
b445e26c | 236 | " nop" |
1da177e4 LT |
237 | : /* no outputs */ |
238 | : "r" (mask), "r" (non_cpu_bits), "r" (&page->flags) | |
239 | : "g1", "g7"); | |
240 | } | |
241 | ||
242 | static __inline__ void clear_dcache_dirty_cpu(struct page *page, unsigned long cpu) | |
243 | { | |
244 | unsigned long mask = (1UL << PG_dcache_dirty); | |
245 | ||
246 | __asm__ __volatile__("! test_and_clear_dcache_dirty\n" | |
247 | "1:\n\t" | |
248 | "ldx [%2], %%g7\n\t" | |
48b0e548 | 249 | "srlx %%g7, %4, %%g1\n\t" |
1da177e4 LT |
250 | "and %%g1, %3, %%g1\n\t" |
251 | "cmp %%g1, %0\n\t" | |
252 | "bne,pn %%icc, 2f\n\t" | |
253 | " andn %%g7, %1, %%g1\n\t" | |
254 | "casx [%2], %%g7, %%g1\n\t" | |
255 | "cmp %%g7, %%g1\n\t" | |
b445e26c | 256 | "membar #StoreLoad | #StoreStore\n\t" |
1da177e4 | 257 | "bne,pn %%xcc, 1b\n\t" |
b445e26c | 258 | " nop\n" |
1da177e4 LT |
259 | "2:" |
260 | : /* no outputs */ | |
261 | : "r" (cpu), "r" (mask), "r" (&page->flags), | |
48b0e548 DM |
262 | "i" (PG_dcache_cpu_mask), |
263 | "i" (PG_dcache_cpu_shift) | |
1da177e4 LT |
264 | : "g1", "g7"); |
265 | } | |
266 | ||
517af332 DM |
267 | static inline void tsb_insert(struct tsb *ent, unsigned long tag, unsigned long pte) |
268 | { | |
269 | unsigned long tsb_addr = (unsigned long) ent; | |
270 | ||
3b3ab2eb | 271 | if (tlb_type == cheetah_plus || tlb_type == hypervisor) |
517af332 DM |
272 | tsb_addr = __pa(tsb_addr); |
273 | ||
274 | __tsb_insert(tsb_addr, tag, pte); | |
275 | } | |
276 | ||
c4bce90e DM |
277 | unsigned long _PAGE_ALL_SZ_BITS __read_mostly; |
278 | unsigned long _PAGE_SZBITS __read_mostly; | |
279 | ||
1da177e4 LT |
280 | void update_mmu_cache(struct vm_area_struct *vma, unsigned long address, pte_t pte) |
281 | { | |
bd40791e | 282 | struct mm_struct *mm; |
74ae9987 DM |
283 | struct tsb *tsb; |
284 | unsigned long tag; | |
7a591cfe DM |
285 | |
286 | if (tlb_type != hypervisor) { | |
287 | unsigned long pfn = pte_pfn(pte); | |
288 | unsigned long pg_flags; | |
289 | struct page *page; | |
290 | ||
291 | if (pfn_valid(pfn) && | |
292 | (page = pfn_to_page(pfn), page_mapping(page)) && | |
293 | ((pg_flags = page->flags) & (1UL << PG_dcache_dirty))) { | |
294 | int cpu = ((pg_flags >> PG_dcache_cpu_shift) & | |
295 | PG_dcache_cpu_mask); | |
296 | int this_cpu = get_cpu(); | |
297 | ||
298 | /* This is just to optimize away some function calls | |
299 | * in the SMP case. | |
300 | */ | |
301 | if (cpu == this_cpu) | |
302 | flush_dcache_page_impl(page); | |
303 | else | |
304 | smp_flush_dcache_page_impl(page, cpu); | |
305 | ||
306 | clear_dcache_dirty_cpu(page, cpu); | |
307 | ||
308 | put_cpu(); | |
309 | } | |
1da177e4 | 310 | } |
bd40791e DM |
311 | |
312 | mm = vma->vm_mm; | |
74ae9987 DM |
313 | tsb = &mm->context.tsb[(address >> PAGE_SHIFT) & |
314 | (mm->context.tsb_nentries - 1UL)]; | |
315 | tag = (address >> 22UL); | |
316 | tsb_insert(tsb, tag, pte_val(pte)); | |
1da177e4 LT |
317 | } |
318 | ||
319 | void flush_dcache_page(struct page *page) | |
320 | { | |
a9546f59 DM |
321 | struct address_space *mapping; |
322 | int this_cpu; | |
1da177e4 | 323 | |
7a591cfe DM |
324 | if (tlb_type == hypervisor) |
325 | return; | |
326 | ||
a9546f59 DM |
327 | /* Do not bother with the expensive D-cache flush if it |
328 | * is merely the zero page. The 'bigcore' testcase in GDB | |
329 | * causes this case to run millions of times. | |
330 | */ | |
331 | if (page == ZERO_PAGE(0)) | |
332 | return; | |
333 | ||
334 | this_cpu = get_cpu(); | |
335 | ||
336 | mapping = page_mapping(page); | |
1da177e4 | 337 | if (mapping && !mapping_mapped(mapping)) { |
a9546f59 | 338 | int dirty = test_bit(PG_dcache_dirty, &page->flags); |
1da177e4 | 339 | if (dirty) { |
a9546f59 DM |
340 | int dirty_cpu = dcache_dirty_cpu(page); |
341 | ||
1da177e4 LT |
342 | if (dirty_cpu == this_cpu) |
343 | goto out; | |
344 | smp_flush_dcache_page_impl(page, dirty_cpu); | |
345 | } | |
346 | set_dcache_dirty(page, this_cpu); | |
347 | } else { | |
348 | /* We could delay the flush for the !page_mapping | |
349 | * case too. But that case is for exec env/arg | |
350 | * pages and those are %99 certainly going to get | |
351 | * faulted into the tlb (and thus flushed) anyways. | |
352 | */ | |
353 | flush_dcache_page_impl(page); | |
354 | } | |
355 | ||
356 | out: | |
357 | put_cpu(); | |
358 | } | |
359 | ||
05e14cb3 | 360 | void __kprobes flush_icache_range(unsigned long start, unsigned long end) |
1da177e4 | 361 | { |
a43fe0e7 | 362 | /* Cheetah and Hypervisor platform cpus have coherent I-cache. */ |
1da177e4 LT |
363 | if (tlb_type == spitfire) { |
364 | unsigned long kaddr; | |
365 | ||
366 | for (kaddr = start; kaddr < end; kaddr += PAGE_SIZE) | |
367 | __flush_icache_page(__get_phys(kaddr)); | |
368 | } | |
369 | } | |
370 | ||
371 | unsigned long page_to_pfn(struct page *page) | |
372 | { | |
373 | return (unsigned long) ((page - mem_map) + pfn_base); | |
374 | } | |
375 | ||
376 | struct page *pfn_to_page(unsigned long pfn) | |
377 | { | |
378 | return (mem_map + (pfn - pfn_base)); | |
379 | } | |
380 | ||
381 | void show_mem(void) | |
382 | { | |
383 | printk("Mem-info:\n"); | |
384 | show_free_areas(); | |
385 | printk("Free swap: %6ldkB\n", | |
386 | nr_swap_pages << (PAGE_SHIFT-10)); | |
387 | printk("%ld pages of RAM\n", num_physpages); | |
388 | printk("%d free pages\n", nr_free_pages()); | |
1da177e4 LT |
389 | } |
390 | ||
391 | void mmu_info(struct seq_file *m) | |
392 | { | |
393 | if (tlb_type == cheetah) | |
394 | seq_printf(m, "MMU Type\t: Cheetah\n"); | |
395 | else if (tlb_type == cheetah_plus) | |
396 | seq_printf(m, "MMU Type\t: Cheetah+\n"); | |
397 | else if (tlb_type == spitfire) | |
398 | seq_printf(m, "MMU Type\t: Spitfire\n"); | |
a43fe0e7 DM |
399 | else if (tlb_type == hypervisor) |
400 | seq_printf(m, "MMU Type\t: Hypervisor (sun4v)\n"); | |
1da177e4 LT |
401 | else |
402 | seq_printf(m, "MMU Type\t: ???\n"); | |
403 | ||
404 | #ifdef CONFIG_DEBUG_DCFLUSH | |
405 | seq_printf(m, "DCPageFlushes\t: %d\n", | |
406 | atomic_read(&dcpage_flushes)); | |
407 | #ifdef CONFIG_SMP | |
408 | seq_printf(m, "DCPageFlushesXC\t: %d\n", | |
409 | atomic_read(&dcpage_flushes_xcall)); | |
410 | #endif /* CONFIG_SMP */ | |
411 | #endif /* CONFIG_DEBUG_DCFLUSH */ | |
412 | } | |
413 | ||
414 | struct linux_prom_translation { | |
415 | unsigned long virt; | |
416 | unsigned long size; | |
417 | unsigned long data; | |
418 | }; | |
c9c10830 DM |
419 | |
420 | /* Exported for kernel TLB miss handling in ktlb.S */ | |
421 | struct linux_prom_translation prom_trans[512] __read_mostly; | |
422 | unsigned int prom_trans_ents __read_mostly; | |
1da177e4 | 423 | |
1da177e4 LT |
424 | /* Exported for SMP bootup purposes. */ |
425 | unsigned long kern_locked_tte_data; | |
426 | ||
c9c10830 DM |
427 | /* The obp translations are saved based on 8k pagesize, since obp can |
428 | * use a mixture of pagesizes. Misses to the LOW_OBP_ADDRESS -> | |
74bf4312 | 429 | * HI_OBP_ADDRESS range are handled in ktlb.S. |
c9c10830 | 430 | */ |
5085b4a5 DM |
431 | static inline int in_obp_range(unsigned long vaddr) |
432 | { | |
433 | return (vaddr >= LOW_OBP_ADDRESS && | |
434 | vaddr < HI_OBP_ADDRESS); | |
435 | } | |
436 | ||
c9c10830 | 437 | static int cmp_ptrans(const void *a, const void *b) |
405599bd | 438 | { |
c9c10830 | 439 | const struct linux_prom_translation *x = a, *y = b; |
405599bd | 440 | |
c9c10830 DM |
441 | if (x->virt > y->virt) |
442 | return 1; | |
443 | if (x->virt < y->virt) | |
444 | return -1; | |
445 | return 0; | |
405599bd DM |
446 | } |
447 | ||
c9c10830 | 448 | /* Read OBP translations property into 'prom_trans[]'. */ |
9ad98c5b | 449 | static void __init read_obp_translations(void) |
405599bd | 450 | { |
c9c10830 | 451 | int n, node, ents, first, last, i; |
1da177e4 LT |
452 | |
453 | node = prom_finddevice("/virtual-memory"); | |
454 | n = prom_getproplen(node, "translations"); | |
405599bd | 455 | if (unlikely(n == 0 || n == -1)) { |
b206fc4c | 456 | prom_printf("prom_mappings: Couldn't get size.\n"); |
1da177e4 LT |
457 | prom_halt(); |
458 | } | |
405599bd DM |
459 | if (unlikely(n > sizeof(prom_trans))) { |
460 | prom_printf("prom_mappings: Size %Zd is too big.\n", n); | |
1da177e4 LT |
461 | prom_halt(); |
462 | } | |
405599bd | 463 | |
b206fc4c | 464 | if ((n = prom_getproperty(node, "translations", |
405599bd DM |
465 | (char *)&prom_trans[0], |
466 | sizeof(prom_trans))) == -1) { | |
b206fc4c | 467 | prom_printf("prom_mappings: Couldn't get property.\n"); |
1da177e4 LT |
468 | prom_halt(); |
469 | } | |
9ad98c5b | 470 | |
b206fc4c | 471 | n = n / sizeof(struct linux_prom_translation); |
9ad98c5b | 472 | |
c9c10830 DM |
473 | ents = n; |
474 | ||
475 | sort(prom_trans, ents, sizeof(struct linux_prom_translation), | |
476 | cmp_ptrans, NULL); | |
477 | ||
478 | /* Now kick out all the non-OBP entries. */ | |
479 | for (i = 0; i < ents; i++) { | |
480 | if (in_obp_range(prom_trans[i].virt)) | |
481 | break; | |
482 | } | |
483 | first = i; | |
484 | for (; i < ents; i++) { | |
485 | if (!in_obp_range(prom_trans[i].virt)) | |
486 | break; | |
487 | } | |
488 | last = i; | |
489 | ||
490 | for (i = 0; i < (last - first); i++) { | |
491 | struct linux_prom_translation *src = &prom_trans[i + first]; | |
492 | struct linux_prom_translation *dest = &prom_trans[i]; | |
493 | ||
494 | *dest = *src; | |
495 | } | |
496 | for (; i < ents; i++) { | |
497 | struct linux_prom_translation *dest = &prom_trans[i]; | |
498 | dest->virt = dest->size = dest->data = 0x0UL; | |
499 | } | |
500 | ||
501 | prom_trans_ents = last - first; | |
502 | ||
503 | if (tlb_type == spitfire) { | |
504 | /* Clear diag TTE bits. */ | |
505 | for (i = 0; i < prom_trans_ents; i++) | |
506 | prom_trans[i].data &= ~0x0003fe0000000000UL; | |
507 | } | |
405599bd | 508 | } |
1da177e4 | 509 | |
d82ace7d DM |
510 | static void __init hypervisor_tlb_lock(unsigned long vaddr, |
511 | unsigned long pte, | |
512 | unsigned long mmu) | |
513 | { | |
164c220f DM |
514 | register unsigned long func asm("%o5"); |
515 | register unsigned long arg0 asm("%o0"); | |
516 | register unsigned long arg1 asm("%o1"); | |
517 | register unsigned long arg2 asm("%o2"); | |
518 | register unsigned long arg3 asm("%o3"); | |
d82ace7d DM |
519 | |
520 | func = HV_FAST_MMU_MAP_PERM_ADDR; | |
521 | arg0 = vaddr; | |
522 | arg1 = 0; | |
523 | arg2 = pte; | |
524 | arg3 = mmu; | |
525 | __asm__ __volatile__("ta 0x80" | |
526 | : "=&r" (func), "=&r" (arg0), | |
527 | "=&r" (arg1), "=&r" (arg2), | |
528 | "=&r" (arg3) | |
529 | : "0" (func), "1" (arg0), "2" (arg1), | |
530 | "3" (arg2), "4" (arg3)); | |
12e126ad DM |
531 | if (arg0 != 0) { |
532 | prom_printf("hypervisor_tlb_lock[%lx:%lx:%lx:%lx]: " | |
533 | "errors with %lx\n", vaddr, 0, pte, mmu, arg0); | |
534 | prom_halt(); | |
535 | } | |
d82ace7d DM |
536 | } |
537 | ||
c4bce90e DM |
538 | static unsigned long kern_large_tte(unsigned long paddr); |
539 | ||
898cf0ec | 540 | static void __init remap_kernel(void) |
405599bd DM |
541 | { |
542 | unsigned long phys_page, tte_vaddr, tte_data; | |
405599bd DM |
543 | int tlb_ent = sparc64_highest_locked_tlbent(); |
544 | ||
1da177e4 | 545 | tte_vaddr = (unsigned long) KERNBASE; |
bff06d55 | 546 | phys_page = (prom_boot_mapping_phys_low >> 22UL) << 22UL; |
c4bce90e | 547 | tte_data = kern_large_tte(phys_page); |
1da177e4 LT |
548 | |
549 | kern_locked_tte_data = tte_data; | |
550 | ||
d82ace7d DM |
551 | /* Now lock us into the TLBs via Hypervisor or OBP. */ |
552 | if (tlb_type == hypervisor) { | |
553 | hypervisor_tlb_lock(tte_vaddr, tte_data, HV_MMU_DMMU); | |
554 | hypervisor_tlb_lock(tte_vaddr, tte_data, HV_MMU_IMMU); | |
555 | if (bigkernel) { | |
556 | tte_vaddr += 0x400000; | |
557 | tte_data += 0x400000; | |
558 | hypervisor_tlb_lock(tte_vaddr, tte_data, HV_MMU_DMMU); | |
559 | hypervisor_tlb_lock(tte_vaddr, tte_data, HV_MMU_IMMU); | |
560 | } | |
561 | } else { | |
562 | prom_dtlb_load(tlb_ent, tte_data, tte_vaddr); | |
563 | prom_itlb_load(tlb_ent, tte_data, tte_vaddr); | |
564 | if (bigkernel) { | |
565 | tlb_ent -= 1; | |
566 | prom_dtlb_load(tlb_ent, | |
567 | tte_data + 0x400000, | |
568 | tte_vaddr + 0x400000); | |
569 | prom_itlb_load(tlb_ent, | |
570 | tte_data + 0x400000, | |
571 | tte_vaddr + 0x400000); | |
572 | } | |
573 | sparc64_highest_unlocked_tlb_ent = tlb_ent - 1; | |
1da177e4 | 574 | } |
0835ae0f DM |
575 | if (tlb_type == cheetah_plus) { |
576 | sparc64_kern_pri_context = (CTX_CHEETAH_PLUS_CTX0 | | |
577 | CTX_CHEETAH_PLUS_NUC); | |
578 | sparc64_kern_pri_nuc_bits = CTX_CHEETAH_PLUS_NUC; | |
579 | sparc64_kern_sec_context = CTX_CHEETAH_PLUS_CTX0; | |
580 | } | |
405599bd | 581 | } |
1da177e4 | 582 | |
405599bd | 583 | |
c9c10830 | 584 | static void __init inherit_prom_mappings(void) |
9ad98c5b DM |
585 | { |
586 | read_obp_translations(); | |
405599bd DM |
587 | |
588 | /* Now fixup OBP's idea about where we really are mapped. */ | |
589 | prom_printf("Remapping the kernel... "); | |
590 | remap_kernel(); | |
1da177e4 | 591 | prom_printf("done.\n"); |
1da177e4 LT |
592 | } |
593 | ||
1da177e4 LT |
594 | void prom_world(int enter) |
595 | { | |
1da177e4 LT |
596 | if (!enter) |
597 | set_fs((mm_segment_t) { get_thread_current_ds() }); | |
598 | ||
3487d1d4 | 599 | __asm__ __volatile__("flushw"); |
1da177e4 LT |
600 | } |
601 | ||
602 | #ifdef DCACHE_ALIASING_POSSIBLE | |
603 | void __flush_dcache_range(unsigned long start, unsigned long end) | |
604 | { | |
605 | unsigned long va; | |
606 | ||
607 | if (tlb_type == spitfire) { | |
608 | int n = 0; | |
609 | ||
610 | for (va = start; va < end; va += 32) { | |
611 | spitfire_put_dcache_tag(va & 0x3fe0, 0x0); | |
612 | if (++n >= 512) | |
613 | break; | |
614 | } | |
a43fe0e7 | 615 | } else if (tlb_type == cheetah || tlb_type == cheetah_plus) { |
1da177e4 LT |
616 | start = __pa(start); |
617 | end = __pa(end); | |
618 | for (va = start; va < end; va += 32) | |
619 | __asm__ __volatile__("stxa %%g0, [%0] %1\n\t" | |
620 | "membar #Sync" | |
621 | : /* no outputs */ | |
622 | : "r" (va), | |
623 | "i" (ASI_DCACHE_INVALIDATE)); | |
624 | } | |
625 | } | |
626 | #endif /* DCACHE_ALIASING_POSSIBLE */ | |
627 | ||
1da177e4 LT |
628 | /* Caller does TLB context flushing on local CPU if necessary. |
629 | * The caller also ensures that CTX_VALID(mm->context) is false. | |
630 | * | |
631 | * We must be careful about boundary cases so that we never | |
632 | * let the user have CTX 0 (nucleus) or we ever use a CTX | |
633 | * version of zero (and thus NO_CONTEXT would not be caught | |
634 | * by version mis-match tests in mmu_context.h). | |
a0663a79 DM |
635 | * |
636 | * Always invoked with interrupts disabled. | |
1da177e4 LT |
637 | */ |
638 | void get_new_mmu_context(struct mm_struct *mm) | |
639 | { | |
640 | unsigned long ctx, new_ctx; | |
641 | unsigned long orig_pgsz_bits; | |
a77754b4 | 642 | unsigned long flags; |
a0663a79 | 643 | int new_version; |
1da177e4 | 644 | |
a77754b4 | 645 | spin_lock_irqsave(&ctx_alloc_lock, flags); |
1da177e4 LT |
646 | orig_pgsz_bits = (mm->context.sparc64_ctx_val & CTX_PGSZ_MASK); |
647 | ctx = (tlb_context_cache + 1) & CTX_NR_MASK; | |
648 | new_ctx = find_next_zero_bit(mmu_context_bmap, 1 << CTX_NR_BITS, ctx); | |
a0663a79 | 649 | new_version = 0; |
1da177e4 LT |
650 | if (new_ctx >= (1 << CTX_NR_BITS)) { |
651 | new_ctx = find_next_zero_bit(mmu_context_bmap, ctx, 1); | |
652 | if (new_ctx >= ctx) { | |
653 | int i; | |
654 | new_ctx = (tlb_context_cache & CTX_VERSION_MASK) + | |
655 | CTX_FIRST_VERSION; | |
656 | if (new_ctx == 1) | |
657 | new_ctx = CTX_FIRST_VERSION; | |
658 | ||
659 | /* Don't call memset, for 16 entries that's just | |
660 | * plain silly... | |
661 | */ | |
662 | mmu_context_bmap[0] = 3; | |
663 | mmu_context_bmap[1] = 0; | |
664 | mmu_context_bmap[2] = 0; | |
665 | mmu_context_bmap[3] = 0; | |
666 | for (i = 4; i < CTX_BMAP_SLOTS; i += 4) { | |
667 | mmu_context_bmap[i + 0] = 0; | |
668 | mmu_context_bmap[i + 1] = 0; | |
669 | mmu_context_bmap[i + 2] = 0; | |
670 | mmu_context_bmap[i + 3] = 0; | |
671 | } | |
a0663a79 | 672 | new_version = 1; |
1da177e4 LT |
673 | goto out; |
674 | } | |
675 | } | |
676 | mmu_context_bmap[new_ctx>>6] |= (1UL << (new_ctx & 63)); | |
677 | new_ctx |= (tlb_context_cache & CTX_VERSION_MASK); | |
678 | out: | |
679 | tlb_context_cache = new_ctx; | |
680 | mm->context.sparc64_ctx_val = new_ctx | orig_pgsz_bits; | |
a77754b4 | 681 | spin_unlock_irqrestore(&ctx_alloc_lock, flags); |
a0663a79 DM |
682 | |
683 | if (unlikely(new_version)) | |
684 | smp_new_mmu_context_version(); | |
1da177e4 LT |
685 | } |
686 | ||
1da177e4 LT |
687 | void sparc_ultra_dump_itlb(void) |
688 | { | |
689 | int slot; | |
690 | ||
691 | if (tlb_type == spitfire) { | |
692 | printk ("Contents of itlb: "); | |
693 | for (slot = 0; slot < 14; slot++) printk (" "); | |
694 | printk ("%2x:%016lx,%016lx\n", | |
695 | 0, | |
696 | spitfire_get_itlb_tag(0), spitfire_get_itlb_data(0)); | |
697 | for (slot = 1; slot < 64; slot+=3) { | |
698 | printk ("%2x:%016lx,%016lx %2x:%016lx,%016lx %2x:%016lx,%016lx\n", | |
699 | slot, | |
700 | spitfire_get_itlb_tag(slot), spitfire_get_itlb_data(slot), | |
701 | slot+1, | |
702 | spitfire_get_itlb_tag(slot+1), spitfire_get_itlb_data(slot+1), | |
703 | slot+2, | |
704 | spitfire_get_itlb_tag(slot+2), spitfire_get_itlb_data(slot+2)); | |
705 | } | |
706 | } else if (tlb_type == cheetah || tlb_type == cheetah_plus) { | |
707 | printk ("Contents of itlb0:\n"); | |
708 | for (slot = 0; slot < 16; slot+=2) { | |
709 | printk ("%2x:%016lx,%016lx %2x:%016lx,%016lx\n", | |
710 | slot, | |
711 | cheetah_get_litlb_tag(slot), cheetah_get_litlb_data(slot), | |
712 | slot+1, | |
713 | cheetah_get_litlb_tag(slot+1), cheetah_get_litlb_data(slot+1)); | |
714 | } | |
715 | printk ("Contents of itlb2:\n"); | |
716 | for (slot = 0; slot < 128; slot+=2) { | |
717 | printk ("%2x:%016lx,%016lx %2x:%016lx,%016lx\n", | |
718 | slot, | |
719 | cheetah_get_itlb_tag(slot), cheetah_get_itlb_data(slot), | |
720 | slot+1, | |
721 | cheetah_get_itlb_tag(slot+1), cheetah_get_itlb_data(slot+1)); | |
722 | } | |
723 | } | |
724 | } | |
725 | ||
726 | void sparc_ultra_dump_dtlb(void) | |
727 | { | |
728 | int slot; | |
729 | ||
730 | if (tlb_type == spitfire) { | |
731 | printk ("Contents of dtlb: "); | |
732 | for (slot = 0; slot < 14; slot++) printk (" "); | |
733 | printk ("%2x:%016lx,%016lx\n", 0, | |
734 | spitfire_get_dtlb_tag(0), spitfire_get_dtlb_data(0)); | |
735 | for (slot = 1; slot < 64; slot+=3) { | |
736 | printk ("%2x:%016lx,%016lx %2x:%016lx,%016lx %2x:%016lx,%016lx\n", | |
737 | slot, | |
738 | spitfire_get_dtlb_tag(slot), spitfire_get_dtlb_data(slot), | |
739 | slot+1, | |
740 | spitfire_get_dtlb_tag(slot+1), spitfire_get_dtlb_data(slot+1), | |
741 | slot+2, | |
742 | spitfire_get_dtlb_tag(slot+2), spitfire_get_dtlb_data(slot+2)); | |
743 | } | |
744 | } else if (tlb_type == cheetah || tlb_type == cheetah_plus) { | |
745 | printk ("Contents of dtlb0:\n"); | |
746 | for (slot = 0; slot < 16; slot+=2) { | |
747 | printk ("%2x:%016lx,%016lx %2x:%016lx,%016lx\n", | |
748 | slot, | |
749 | cheetah_get_ldtlb_tag(slot), cheetah_get_ldtlb_data(slot), | |
750 | slot+1, | |
751 | cheetah_get_ldtlb_tag(slot+1), cheetah_get_ldtlb_data(slot+1)); | |
752 | } | |
753 | printk ("Contents of dtlb2:\n"); | |
754 | for (slot = 0; slot < 512; slot+=2) { | |
755 | printk ("%2x:%016lx,%016lx %2x:%016lx,%016lx\n", | |
756 | slot, | |
757 | cheetah_get_dtlb_tag(slot, 2), cheetah_get_dtlb_data(slot, 2), | |
758 | slot+1, | |
759 | cheetah_get_dtlb_tag(slot+1, 2), cheetah_get_dtlb_data(slot+1, 2)); | |
760 | } | |
761 | if (tlb_type == cheetah_plus) { | |
762 | printk ("Contents of dtlb3:\n"); | |
763 | for (slot = 0; slot < 512; slot+=2) { | |
764 | printk ("%2x:%016lx,%016lx %2x:%016lx,%016lx\n", | |
765 | slot, | |
766 | cheetah_get_dtlb_tag(slot, 3), cheetah_get_dtlb_data(slot, 3), | |
767 | slot+1, | |
768 | cheetah_get_dtlb_tag(slot+1, 3), cheetah_get_dtlb_data(slot+1, 3)); | |
769 | } | |
770 | } | |
771 | } | |
772 | } | |
773 | ||
774 | extern unsigned long cmdline_memory_size; | |
775 | ||
776 | unsigned long __init bootmem_init(unsigned long *pages_avail) | |
777 | { | |
778 | unsigned long bootmap_size, start_pfn, end_pfn; | |
779 | unsigned long end_of_phys_memory = 0UL; | |
780 | unsigned long bootmap_pfn, bytes_avail, size; | |
781 | int i; | |
782 | ||
783 | #ifdef CONFIG_DEBUG_BOOTMEM | |
13edad7a | 784 | prom_printf("bootmem_init: Scan pavail, "); |
1da177e4 LT |
785 | #endif |
786 | ||
787 | bytes_avail = 0UL; | |
13edad7a DM |
788 | for (i = 0; i < pavail_ents; i++) { |
789 | end_of_phys_memory = pavail[i].phys_addr + | |
790 | pavail[i].reg_size; | |
791 | bytes_avail += pavail[i].reg_size; | |
1da177e4 LT |
792 | if (cmdline_memory_size) { |
793 | if (bytes_avail > cmdline_memory_size) { | |
794 | unsigned long slack = bytes_avail - cmdline_memory_size; | |
795 | ||
796 | bytes_avail -= slack; | |
797 | end_of_phys_memory -= slack; | |
798 | ||
13edad7a DM |
799 | pavail[i].reg_size -= slack; |
800 | if ((long)pavail[i].reg_size <= 0L) { | |
801 | pavail[i].phys_addr = 0xdeadbeefUL; | |
802 | pavail[i].reg_size = 0UL; | |
803 | pavail_ents = i; | |
1da177e4 | 804 | } else { |
13edad7a DM |
805 | pavail[i+1].reg_size = 0Ul; |
806 | pavail[i+1].phys_addr = 0xdeadbeefUL; | |
807 | pavail_ents = i + 1; | |
1da177e4 LT |
808 | } |
809 | break; | |
810 | } | |
811 | } | |
812 | } | |
813 | ||
814 | *pages_avail = bytes_avail >> PAGE_SHIFT; | |
815 | ||
816 | /* Start with page aligned address of last symbol in kernel | |
817 | * image. The kernel is hard mapped below PAGE_OFFSET in a | |
818 | * 4MB locked TLB translation. | |
819 | */ | |
820 | start_pfn = PAGE_ALIGN(kern_base + kern_size) >> PAGE_SHIFT; | |
821 | ||
822 | bootmap_pfn = start_pfn; | |
823 | ||
824 | end_pfn = end_of_phys_memory >> PAGE_SHIFT; | |
825 | ||
826 | #ifdef CONFIG_BLK_DEV_INITRD | |
827 | /* Now have to check initial ramdisk, so that bootmap does not overwrite it */ | |
828 | if (sparc_ramdisk_image || sparc_ramdisk_image64) { | |
829 | unsigned long ramdisk_image = sparc_ramdisk_image ? | |
830 | sparc_ramdisk_image : sparc_ramdisk_image64; | |
831 | if (ramdisk_image >= (unsigned long)_end - 2 * PAGE_SIZE) | |
832 | ramdisk_image -= KERNBASE; | |
833 | initrd_start = ramdisk_image + phys_base; | |
834 | initrd_end = initrd_start + sparc_ramdisk_size; | |
835 | if (initrd_end > end_of_phys_memory) { | |
836 | printk(KERN_CRIT "initrd extends beyond end of memory " | |
837 | "(0x%016lx > 0x%016lx)\ndisabling initrd\n", | |
838 | initrd_end, end_of_phys_memory); | |
839 | initrd_start = 0; | |
840 | } | |
841 | if (initrd_start) { | |
842 | if (initrd_start >= (start_pfn << PAGE_SHIFT) && | |
843 | initrd_start < (start_pfn << PAGE_SHIFT) + 2 * PAGE_SIZE) | |
844 | bootmap_pfn = PAGE_ALIGN (initrd_end) >> PAGE_SHIFT; | |
845 | } | |
846 | } | |
847 | #endif | |
848 | /* Initialize the boot-time allocator. */ | |
849 | max_pfn = max_low_pfn = end_pfn; | |
850 | min_low_pfn = pfn_base; | |
851 | ||
852 | #ifdef CONFIG_DEBUG_BOOTMEM | |
853 | prom_printf("init_bootmem(min[%lx], bootmap[%lx], max[%lx])\n", | |
854 | min_low_pfn, bootmap_pfn, max_low_pfn); | |
855 | #endif | |
856 | bootmap_size = init_bootmem_node(NODE_DATA(0), bootmap_pfn, pfn_base, end_pfn); | |
857 | ||
1da177e4 LT |
858 | /* Now register the available physical memory with the |
859 | * allocator. | |
860 | */ | |
13edad7a | 861 | for (i = 0; i < pavail_ents; i++) { |
1da177e4 | 862 | #ifdef CONFIG_DEBUG_BOOTMEM |
13edad7a DM |
863 | prom_printf("free_bootmem(pavail:%d): base[%lx] size[%lx]\n", |
864 | i, pavail[i].phys_addr, pavail[i].reg_size); | |
1da177e4 | 865 | #endif |
13edad7a | 866 | free_bootmem(pavail[i].phys_addr, pavail[i].reg_size); |
1da177e4 LT |
867 | } |
868 | ||
869 | #ifdef CONFIG_BLK_DEV_INITRD | |
870 | if (initrd_start) { | |
871 | size = initrd_end - initrd_start; | |
872 | ||
873 | /* Resert the initrd image area. */ | |
874 | #ifdef CONFIG_DEBUG_BOOTMEM | |
875 | prom_printf("reserve_bootmem(initrd): base[%llx] size[%lx]\n", | |
876 | initrd_start, initrd_end); | |
877 | #endif | |
878 | reserve_bootmem(initrd_start, size); | |
879 | *pages_avail -= PAGE_ALIGN(size) >> PAGE_SHIFT; | |
880 | ||
881 | initrd_start += PAGE_OFFSET; | |
882 | initrd_end += PAGE_OFFSET; | |
883 | } | |
884 | #endif | |
885 | /* Reserve the kernel text/data/bss. */ | |
886 | #ifdef CONFIG_DEBUG_BOOTMEM | |
887 | prom_printf("reserve_bootmem(kernel): base[%lx] size[%lx]\n", kern_base, kern_size); | |
888 | #endif | |
889 | reserve_bootmem(kern_base, kern_size); | |
890 | *pages_avail -= PAGE_ALIGN(kern_size) >> PAGE_SHIFT; | |
891 | ||
892 | /* Reserve the bootmem map. We do not account for it | |
893 | * in pages_avail because we will release that memory | |
894 | * in free_all_bootmem. | |
895 | */ | |
896 | size = bootmap_size; | |
897 | #ifdef CONFIG_DEBUG_BOOTMEM | |
898 | prom_printf("reserve_bootmem(bootmap): base[%lx] size[%lx]\n", | |
899 | (bootmap_pfn << PAGE_SHIFT), size); | |
900 | #endif | |
901 | reserve_bootmem((bootmap_pfn << PAGE_SHIFT), size); | |
902 | *pages_avail -= PAGE_ALIGN(size) >> PAGE_SHIFT; | |
903 | ||
904 | return end_pfn; | |
905 | } | |
906 | ||
9cc3a1ac DM |
907 | static struct linux_prom64_registers pall[MAX_BANKS] __initdata; |
908 | static int pall_ents __initdata; | |
909 | ||
56425306 DM |
910 | #ifdef CONFIG_DEBUG_PAGEALLOC |
911 | static unsigned long kernel_map_range(unsigned long pstart, unsigned long pend, pgprot_t prot) | |
912 | { | |
913 | unsigned long vstart = PAGE_OFFSET + pstart; | |
914 | unsigned long vend = PAGE_OFFSET + pend; | |
915 | unsigned long alloc_bytes = 0UL; | |
916 | ||
917 | if ((vstart & ~PAGE_MASK) || (vend & ~PAGE_MASK)) { | |
13edad7a | 918 | prom_printf("kernel_map: Unaligned physmem[%lx:%lx]\n", |
56425306 DM |
919 | vstart, vend); |
920 | prom_halt(); | |
921 | } | |
922 | ||
923 | while (vstart < vend) { | |
924 | unsigned long this_end, paddr = __pa(vstart); | |
925 | pgd_t *pgd = pgd_offset_k(vstart); | |
926 | pud_t *pud; | |
927 | pmd_t *pmd; | |
928 | pte_t *pte; | |
929 | ||
930 | pud = pud_offset(pgd, vstart); | |
931 | if (pud_none(*pud)) { | |
932 | pmd_t *new; | |
933 | ||
934 | new = __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, PAGE_SIZE); | |
935 | alloc_bytes += PAGE_SIZE; | |
936 | pud_populate(&init_mm, pud, new); | |
937 | } | |
938 | ||
939 | pmd = pmd_offset(pud, vstart); | |
940 | if (!pmd_present(*pmd)) { | |
941 | pte_t *new; | |
942 | ||
943 | new = __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, PAGE_SIZE); | |
944 | alloc_bytes += PAGE_SIZE; | |
945 | pmd_populate_kernel(&init_mm, pmd, new); | |
946 | } | |
947 | ||
948 | pte = pte_offset_kernel(pmd, vstart); | |
949 | this_end = (vstart + PMD_SIZE) & PMD_MASK; | |
950 | if (this_end > vend) | |
951 | this_end = vend; | |
952 | ||
953 | while (vstart < this_end) { | |
954 | pte_val(*pte) = (paddr | pgprot_val(prot)); | |
955 | ||
956 | vstart += PAGE_SIZE; | |
957 | paddr += PAGE_SIZE; | |
958 | pte++; | |
959 | } | |
960 | } | |
961 | ||
962 | return alloc_bytes; | |
963 | } | |
964 | ||
56425306 | 965 | extern unsigned int kvmap_linear_patch[1]; |
9cc3a1ac DM |
966 | #endif /* CONFIG_DEBUG_PAGEALLOC */ |
967 | ||
968 | static void __init mark_kpte_bitmap(unsigned long start, unsigned long end) | |
969 | { | |
970 | const unsigned long shift_256MB = 28; | |
971 | const unsigned long mask_256MB = ((1UL << shift_256MB) - 1UL); | |
972 | const unsigned long size_256MB = (1UL << shift_256MB); | |
973 | ||
974 | while (start < end) { | |
975 | long remains; | |
976 | ||
f7c00338 DM |
977 | remains = end - start; |
978 | if (remains < size_256MB) | |
979 | break; | |
980 | ||
9cc3a1ac DM |
981 | if (start & mask_256MB) { |
982 | start = (start + size_256MB) & ~mask_256MB; | |
983 | continue; | |
984 | } | |
985 | ||
9cc3a1ac DM |
986 | while (remains >= size_256MB) { |
987 | unsigned long index = start >> shift_256MB; | |
988 | ||
989 | __set_bit(index, kpte_linear_bitmap); | |
990 | ||
991 | start += size_256MB; | |
992 | remains -= size_256MB; | |
993 | } | |
994 | } | |
995 | } | |
56425306 DM |
996 | |
997 | static void __init kernel_physical_mapping_init(void) | |
998 | { | |
9cc3a1ac DM |
999 | unsigned long i; |
1000 | #ifdef CONFIG_DEBUG_PAGEALLOC | |
1001 | unsigned long mem_alloced = 0UL; | |
1002 | #endif | |
56425306 | 1003 | |
13edad7a DM |
1004 | read_obp_memory("reg", &pall[0], &pall_ents); |
1005 | ||
1006 | for (i = 0; i < pall_ents; i++) { | |
56425306 DM |
1007 | unsigned long phys_start, phys_end; |
1008 | ||
13edad7a DM |
1009 | phys_start = pall[i].phys_addr; |
1010 | phys_end = phys_start + pall[i].reg_size; | |
9cc3a1ac DM |
1011 | |
1012 | mark_kpte_bitmap(phys_start, phys_end); | |
1013 | ||
1014 | #ifdef CONFIG_DEBUG_PAGEALLOC | |
56425306 DM |
1015 | mem_alloced += kernel_map_range(phys_start, phys_end, |
1016 | PAGE_KERNEL); | |
9cc3a1ac | 1017 | #endif |
56425306 DM |
1018 | } |
1019 | ||
9cc3a1ac | 1020 | #ifdef CONFIG_DEBUG_PAGEALLOC |
56425306 DM |
1021 | printk("Allocated %ld bytes for kernel page tables.\n", |
1022 | mem_alloced); | |
1023 | ||
1024 | kvmap_linear_patch[0] = 0x01000000; /* nop */ | |
1025 | flushi(&kvmap_linear_patch[0]); | |
1026 | ||
1027 | __flush_tlb_all(); | |
9cc3a1ac | 1028 | #endif |
56425306 DM |
1029 | } |
1030 | ||
9cc3a1ac | 1031 | #ifdef CONFIG_DEBUG_PAGEALLOC |
56425306 DM |
1032 | void kernel_map_pages(struct page *page, int numpages, int enable) |
1033 | { | |
1034 | unsigned long phys_start = page_to_pfn(page) << PAGE_SHIFT; | |
1035 | unsigned long phys_end = phys_start + (numpages * PAGE_SIZE); | |
1036 | ||
1037 | kernel_map_range(phys_start, phys_end, | |
1038 | (enable ? PAGE_KERNEL : __pgprot(0))); | |
1039 | ||
74bf4312 DM |
1040 | flush_tsb_kernel_range(PAGE_OFFSET + phys_start, |
1041 | PAGE_OFFSET + phys_end); | |
1042 | ||
56425306 DM |
1043 | /* we should perform an IPI and flush all tlbs, |
1044 | * but that can deadlock->flush only current cpu. | |
1045 | */ | |
1046 | __flush_tlb_kernel_range(PAGE_OFFSET + phys_start, | |
1047 | PAGE_OFFSET + phys_end); | |
1048 | } | |
1049 | #endif | |
1050 | ||
10147570 DM |
1051 | unsigned long __init find_ecache_flush_span(unsigned long size) |
1052 | { | |
0836a0eb DM |
1053 | int i; |
1054 | ||
13edad7a DM |
1055 | for (i = 0; i < pavail_ents; i++) { |
1056 | if (pavail[i].reg_size >= size) | |
1057 | return pavail[i].phys_addr; | |
0836a0eb DM |
1058 | } |
1059 | ||
13edad7a | 1060 | return ~0UL; |
0836a0eb DM |
1061 | } |
1062 | ||
517af332 DM |
1063 | static void __init tsb_phys_patch(void) |
1064 | { | |
d257d5da | 1065 | struct tsb_ldquad_phys_patch_entry *pquad; |
517af332 DM |
1066 | struct tsb_phys_patch_entry *p; |
1067 | ||
d257d5da DM |
1068 | pquad = &__tsb_ldquad_phys_patch; |
1069 | while (pquad < &__tsb_ldquad_phys_patch_end) { | |
1070 | unsigned long addr = pquad->addr; | |
1071 | ||
1072 | if (tlb_type == hypervisor) | |
1073 | *(unsigned int *) addr = pquad->sun4v_insn; | |
1074 | else | |
1075 | *(unsigned int *) addr = pquad->sun4u_insn; | |
1076 | wmb(); | |
1077 | __asm__ __volatile__("flush %0" | |
1078 | : /* no outputs */ | |
1079 | : "r" (addr)); | |
1080 | ||
1081 | pquad++; | |
1082 | } | |
1083 | ||
517af332 DM |
1084 | p = &__tsb_phys_patch; |
1085 | while (p < &__tsb_phys_patch_end) { | |
1086 | unsigned long addr = p->addr; | |
1087 | ||
1088 | *(unsigned int *) addr = p->insn; | |
1089 | wmb(); | |
1090 | __asm__ __volatile__("flush %0" | |
1091 | : /* no outputs */ | |
1092 | : "r" (addr)); | |
1093 | ||
1094 | p++; | |
1095 | } | |
1096 | } | |
1097 | ||
490384e7 DM |
1098 | /* Don't mark as init, we give this to the Hypervisor. */ |
1099 | static struct hv_tsb_descr ktsb_descr[2]; | |
1100 | extern struct tsb swapper_tsb[KERNEL_TSB_NENTRIES]; | |
1101 | ||
1102 | static void __init sun4v_ktsb_init(void) | |
1103 | { | |
1104 | unsigned long ktsb_pa; | |
1105 | ||
d7744a09 | 1106 | /* First KTSB for PAGE_SIZE mappings. */ |
490384e7 DM |
1107 | ktsb_pa = kern_base + ((unsigned long)&swapper_tsb[0] - KERNBASE); |
1108 | ||
1109 | switch (PAGE_SIZE) { | |
1110 | case 8 * 1024: | |
1111 | default: | |
1112 | ktsb_descr[0].pgsz_idx = HV_PGSZ_IDX_8K; | |
1113 | ktsb_descr[0].pgsz_mask = HV_PGSZ_MASK_8K; | |
1114 | break; | |
1115 | ||
1116 | case 64 * 1024: | |
1117 | ktsb_descr[0].pgsz_idx = HV_PGSZ_IDX_64K; | |
1118 | ktsb_descr[0].pgsz_mask = HV_PGSZ_MASK_64K; | |
1119 | break; | |
1120 | ||
1121 | case 512 * 1024: | |
1122 | ktsb_descr[0].pgsz_idx = HV_PGSZ_IDX_512K; | |
1123 | ktsb_descr[0].pgsz_mask = HV_PGSZ_MASK_512K; | |
1124 | break; | |
1125 | ||
1126 | case 4 * 1024 * 1024: | |
1127 | ktsb_descr[0].pgsz_idx = HV_PGSZ_IDX_4MB; | |
1128 | ktsb_descr[0].pgsz_mask = HV_PGSZ_MASK_4MB; | |
1129 | break; | |
1130 | }; | |
1131 | ||
3f19a84e | 1132 | ktsb_descr[0].assoc = 1; |
490384e7 DM |
1133 | ktsb_descr[0].num_ttes = KERNEL_TSB_NENTRIES; |
1134 | ktsb_descr[0].ctx_idx = 0; | |
1135 | ktsb_descr[0].tsb_base = ktsb_pa; | |
1136 | ktsb_descr[0].resv = 0; | |
1137 | ||
d7744a09 DM |
1138 | /* Second KTSB for 4MB/256MB mappings. */ |
1139 | ktsb_pa = (kern_base + | |
1140 | ((unsigned long)&swapper_4m_tsb[0] - KERNBASE)); | |
1141 | ||
1142 | ktsb_descr[1].pgsz_idx = HV_PGSZ_IDX_4MB; | |
1143 | ktsb_descr[1].pgsz_mask = (HV_PGSZ_MASK_4MB | | |
1144 | HV_PGSZ_MASK_256MB); | |
1145 | ktsb_descr[1].assoc = 1; | |
1146 | ktsb_descr[1].num_ttes = KERNEL_TSB4M_NENTRIES; | |
1147 | ktsb_descr[1].ctx_idx = 0; | |
1148 | ktsb_descr[1].tsb_base = ktsb_pa; | |
1149 | ktsb_descr[1].resv = 0; | |
490384e7 DM |
1150 | } |
1151 | ||
1152 | void __cpuinit sun4v_ktsb_register(void) | |
1153 | { | |
1154 | register unsigned long func asm("%o5"); | |
1155 | register unsigned long arg0 asm("%o0"); | |
1156 | register unsigned long arg1 asm("%o1"); | |
1157 | unsigned long pa; | |
1158 | ||
1159 | pa = kern_base + ((unsigned long)&ktsb_descr[0] - KERNBASE); | |
1160 | ||
1161 | func = HV_FAST_MMU_TSB_CTX0; | |
d7744a09 | 1162 | arg0 = 2; |
490384e7 DM |
1163 | arg1 = pa; |
1164 | __asm__ __volatile__("ta %6" | |
1165 | : "=&r" (func), "=&r" (arg0), "=&r" (arg1) | |
1166 | : "0" (func), "1" (arg0), "2" (arg1), | |
1167 | "i" (HV_FAST_TRAP)); | |
1168 | } | |
1169 | ||
1da177e4 LT |
1170 | /* paging_init() sets up the page tables */ |
1171 | ||
1172 | extern void cheetah_ecache_flush_init(void); | |
d257d5da | 1173 | extern void sun4v_patch_tlb_handlers(void); |
1da177e4 LT |
1174 | |
1175 | static unsigned long last_valid_pfn; | |
56425306 | 1176 | pgd_t swapper_pg_dir[2048]; |
1da177e4 | 1177 | |
c4bce90e DM |
1178 | static void sun4u_pgprot_init(void); |
1179 | static void sun4v_pgprot_init(void); | |
1180 | ||
1da177e4 LT |
1181 | void __init paging_init(void) |
1182 | { | |
2bdb3cb2 | 1183 | unsigned long end_pfn, pages_avail, shift; |
0836a0eb DM |
1184 | unsigned long real_end, i; |
1185 | ||
481295f9 DM |
1186 | kern_base = (prom_boot_mapping_phys_low >> 22UL) << 22UL; |
1187 | kern_size = (unsigned long)&_end - (unsigned long)KERNBASE; | |
1188 | ||
d7744a09 | 1189 | /* Invalidate both kernel TSBs. */ |
8b234274 | 1190 | memset(swapper_tsb, 0x40, sizeof(swapper_tsb)); |
d7744a09 | 1191 | memset(swapper_4m_tsb, 0x40, sizeof(swapper_4m_tsb)); |
8b234274 | 1192 | |
c4bce90e DM |
1193 | if (tlb_type == hypervisor) |
1194 | sun4v_pgprot_init(); | |
1195 | else | |
1196 | sun4u_pgprot_init(); | |
1197 | ||
d257d5da DM |
1198 | if (tlb_type == cheetah_plus || |
1199 | tlb_type == hypervisor) | |
517af332 DM |
1200 | tsb_phys_patch(); |
1201 | ||
490384e7 | 1202 | if (tlb_type == hypervisor) { |
d257d5da | 1203 | sun4v_patch_tlb_handlers(); |
490384e7 DM |
1204 | sun4v_ktsb_init(); |
1205 | } | |
d257d5da | 1206 | |
13edad7a DM |
1207 | /* Find available physical memory... */ |
1208 | read_obp_memory("available", &pavail[0], &pavail_ents); | |
0836a0eb DM |
1209 | |
1210 | phys_base = 0xffffffffffffffffUL; | |
13edad7a DM |
1211 | for (i = 0; i < pavail_ents; i++) |
1212 | phys_base = min(phys_base, pavail[i].phys_addr); | |
0836a0eb | 1213 | |
0836a0eb DM |
1214 | pfn_base = phys_base >> PAGE_SHIFT; |
1215 | ||
1da177e4 LT |
1216 | set_bit(0, mmu_context_bmap); |
1217 | ||
2bdb3cb2 DM |
1218 | shift = kern_base + PAGE_OFFSET - ((unsigned long)KERNBASE); |
1219 | ||
1da177e4 LT |
1220 | real_end = (unsigned long)_end; |
1221 | if ((real_end > ((unsigned long)KERNBASE + 0x400000))) | |
1222 | bigkernel = 1; | |
2bdb3cb2 DM |
1223 | if ((real_end > ((unsigned long)KERNBASE + 0x800000))) { |
1224 | prom_printf("paging_init: Kernel > 8MB, too large.\n"); | |
1225 | prom_halt(); | |
1da177e4 | 1226 | } |
2bdb3cb2 DM |
1227 | |
1228 | /* Set kernel pgd to upper alias so physical page computations | |
1da177e4 LT |
1229 | * work. |
1230 | */ | |
1231 | init_mm.pgd += ((shift) / (sizeof(pgd_t))); | |
1232 | ||
56425306 | 1233 | memset(swapper_low_pmd_dir, 0, sizeof(swapper_low_pmd_dir)); |
1da177e4 LT |
1234 | |
1235 | /* Now can init the kernel/bad page tables. */ | |
1236 | pud_set(pud_offset(&swapper_pg_dir[0], 0), | |
56425306 | 1237 | swapper_low_pmd_dir + (shift / sizeof(pgd_t))); |
1da177e4 | 1238 | |
c9c10830 | 1239 | inherit_prom_mappings(); |
5085b4a5 | 1240 | |
a8b900d8 DM |
1241 | /* Ok, we can use our TLB miss and window trap handlers safely. */ |
1242 | setup_tba(); | |
1da177e4 | 1243 | |
c9c10830 | 1244 | __flush_tlb_all(); |
9ad98c5b | 1245 | |
490384e7 DM |
1246 | if (tlb_type == hypervisor) |
1247 | sun4v_ktsb_register(); | |
1248 | ||
2bdb3cb2 DM |
1249 | /* Setup bootmem... */ |
1250 | pages_avail = 0; | |
1251 | last_valid_pfn = end_pfn = bootmem_init(&pages_avail); | |
1252 | ||
56425306 | 1253 | kernel_physical_mapping_init(); |
56425306 | 1254 | |
1da177e4 LT |
1255 | { |
1256 | unsigned long zones_size[MAX_NR_ZONES]; | |
1257 | unsigned long zholes_size[MAX_NR_ZONES]; | |
1258 | unsigned long npages; | |
1259 | int znum; | |
1260 | ||
1261 | for (znum = 0; znum < MAX_NR_ZONES; znum++) | |
1262 | zones_size[znum] = zholes_size[znum] = 0; | |
1263 | ||
1264 | npages = end_pfn - pfn_base; | |
1265 | zones_size[ZONE_DMA] = npages; | |
1266 | zholes_size[ZONE_DMA] = npages - pages_avail; | |
1267 | ||
1268 | free_area_init_node(0, &contig_page_data, zones_size, | |
1269 | phys_base >> PAGE_SHIFT, zholes_size); | |
1270 | } | |
1271 | ||
1272 | device_scan(); | |
1273 | } | |
1274 | ||
1da177e4 LT |
1275 | static void __init taint_real_pages(void) |
1276 | { | |
1da177e4 LT |
1277 | int i; |
1278 | ||
13edad7a | 1279 | read_obp_memory("available", &pavail_rescan[0], &pavail_rescan_ents); |
1da177e4 | 1280 | |
13edad7a | 1281 | /* Find changes discovered in the physmem available rescan and |
1da177e4 LT |
1282 | * reserve the lost portions in the bootmem maps. |
1283 | */ | |
13edad7a | 1284 | for (i = 0; i < pavail_ents; i++) { |
1da177e4 LT |
1285 | unsigned long old_start, old_end; |
1286 | ||
13edad7a | 1287 | old_start = pavail[i].phys_addr; |
1da177e4 | 1288 | old_end = old_start + |
13edad7a | 1289 | pavail[i].reg_size; |
1da177e4 LT |
1290 | while (old_start < old_end) { |
1291 | int n; | |
1292 | ||
13edad7a | 1293 | for (n = 0; pavail_rescan_ents; n++) { |
1da177e4 LT |
1294 | unsigned long new_start, new_end; |
1295 | ||
13edad7a DM |
1296 | new_start = pavail_rescan[n].phys_addr; |
1297 | new_end = new_start + | |
1298 | pavail_rescan[n].reg_size; | |
1da177e4 LT |
1299 | |
1300 | if (new_start <= old_start && | |
1301 | new_end >= (old_start + PAGE_SIZE)) { | |
13edad7a DM |
1302 | set_bit(old_start >> 22, |
1303 | sparc64_valid_addr_bitmap); | |
1da177e4 LT |
1304 | goto do_next_page; |
1305 | } | |
1306 | } | |
1307 | reserve_bootmem(old_start, PAGE_SIZE); | |
1308 | ||
1309 | do_next_page: | |
1310 | old_start += PAGE_SIZE; | |
1311 | } | |
1312 | } | |
1313 | } | |
1314 | ||
1315 | void __init mem_init(void) | |
1316 | { | |
1317 | unsigned long codepages, datapages, initpages; | |
1318 | unsigned long addr, last; | |
1319 | int i; | |
1320 | ||
1321 | i = last_valid_pfn >> ((22 - PAGE_SHIFT) + 6); | |
1322 | i += 1; | |
2bdb3cb2 | 1323 | sparc64_valid_addr_bitmap = (unsigned long *) alloc_bootmem(i << 3); |
1da177e4 LT |
1324 | if (sparc64_valid_addr_bitmap == NULL) { |
1325 | prom_printf("mem_init: Cannot alloc valid_addr_bitmap.\n"); | |
1326 | prom_halt(); | |
1327 | } | |
1328 | memset(sparc64_valid_addr_bitmap, 0, i << 3); | |
1329 | ||
1330 | addr = PAGE_OFFSET + kern_base; | |
1331 | last = PAGE_ALIGN(kern_size) + addr; | |
1332 | while (addr < last) { | |
1333 | set_bit(__pa(addr) >> 22, sparc64_valid_addr_bitmap); | |
1334 | addr += PAGE_SIZE; | |
1335 | } | |
1336 | ||
1337 | taint_real_pages(); | |
1338 | ||
1339 | max_mapnr = last_valid_pfn - pfn_base; | |
1340 | high_memory = __va(last_valid_pfn << PAGE_SHIFT); | |
1341 | ||
1342 | #ifdef CONFIG_DEBUG_BOOTMEM | |
1343 | prom_printf("mem_init: Calling free_all_bootmem().\n"); | |
1344 | #endif | |
1345 | totalram_pages = num_physpages = free_all_bootmem() - 1; | |
1346 | ||
1347 | /* | |
1348 | * Set up the zero page, mark it reserved, so that page count | |
1349 | * is not manipulated when freeing the page from user ptes. | |
1350 | */ | |
1351 | mem_map_zero = alloc_pages(GFP_KERNEL|__GFP_ZERO, 0); | |
1352 | if (mem_map_zero == NULL) { | |
1353 | prom_printf("paging_init: Cannot alloc zero page.\n"); | |
1354 | prom_halt(); | |
1355 | } | |
1356 | SetPageReserved(mem_map_zero); | |
1357 | ||
1358 | codepages = (((unsigned long) _etext) - ((unsigned long) _start)); | |
1359 | codepages = PAGE_ALIGN(codepages) >> PAGE_SHIFT; | |
1360 | datapages = (((unsigned long) _edata) - ((unsigned long) _etext)); | |
1361 | datapages = PAGE_ALIGN(datapages) >> PAGE_SHIFT; | |
1362 | initpages = (((unsigned long) __init_end) - ((unsigned long) __init_begin)); | |
1363 | initpages = PAGE_ALIGN(initpages) >> PAGE_SHIFT; | |
1364 | ||
1365 | printk("Memory: %uk available (%ldk kernel code, %ldk data, %ldk init) [%016lx,%016lx]\n", | |
1366 | nr_free_pages() << (PAGE_SHIFT-10), | |
1367 | codepages << (PAGE_SHIFT-10), | |
1368 | datapages << (PAGE_SHIFT-10), | |
1369 | initpages << (PAGE_SHIFT-10), | |
1370 | PAGE_OFFSET, (last_valid_pfn << PAGE_SHIFT)); | |
1371 | ||
1372 | if (tlb_type == cheetah || tlb_type == cheetah_plus) | |
1373 | cheetah_ecache_flush_init(); | |
1374 | } | |
1375 | ||
898cf0ec | 1376 | void free_initmem(void) |
1da177e4 LT |
1377 | { |
1378 | unsigned long addr, initend; | |
1379 | ||
1380 | /* | |
1381 | * The init section is aligned to 8k in vmlinux.lds. Page align for >8k pagesizes. | |
1382 | */ | |
1383 | addr = PAGE_ALIGN((unsigned long)(__init_begin)); | |
1384 | initend = (unsigned long)(__init_end) & PAGE_MASK; | |
1385 | for (; addr < initend; addr += PAGE_SIZE) { | |
1386 | unsigned long page; | |
1387 | struct page *p; | |
1388 | ||
1389 | page = (addr + | |
1390 | ((unsigned long) __va(kern_base)) - | |
1391 | ((unsigned long) KERNBASE)); | |
1392 | memset((void *)addr, 0xcc, PAGE_SIZE); | |
1393 | p = virt_to_page(page); | |
1394 | ||
1395 | ClearPageReserved(p); | |
1396 | set_page_count(p, 1); | |
1397 | __free_page(p); | |
1398 | num_physpages++; | |
1399 | totalram_pages++; | |
1400 | } | |
1401 | } | |
1402 | ||
1403 | #ifdef CONFIG_BLK_DEV_INITRD | |
1404 | void free_initrd_mem(unsigned long start, unsigned long end) | |
1405 | { | |
1406 | if (start < end) | |
1407 | printk ("Freeing initrd memory: %ldk freed\n", (end - start) >> 10); | |
1408 | for (; start < end; start += PAGE_SIZE) { | |
1409 | struct page *p = virt_to_page(start); | |
1410 | ||
1411 | ClearPageReserved(p); | |
1412 | set_page_count(p, 1); | |
1413 | __free_page(p); | |
1414 | num_physpages++; | |
1415 | totalram_pages++; | |
1416 | } | |
1417 | } | |
1418 | #endif | |
c4bce90e | 1419 | |
c4bce90e DM |
1420 | #define _PAGE_CACHE_4U (_PAGE_CP_4U | _PAGE_CV_4U) |
1421 | #define _PAGE_CACHE_4V (_PAGE_CP_4V | _PAGE_CV_4V) | |
1422 | #define __DIRTY_BITS_4U (_PAGE_MODIFIED_4U | _PAGE_WRITE_4U | _PAGE_W_4U) | |
1423 | #define __DIRTY_BITS_4V (_PAGE_MODIFIED_4V | _PAGE_WRITE_4V | _PAGE_W_4V) | |
1424 | #define __ACCESS_BITS_4U (_PAGE_ACCESSED_4U | _PAGE_READ_4U | _PAGE_R) | |
1425 | #define __ACCESS_BITS_4V (_PAGE_ACCESSED_4V | _PAGE_READ_4V | _PAGE_R) | |
1426 | ||
1427 | pgprot_t PAGE_KERNEL __read_mostly; | |
1428 | EXPORT_SYMBOL(PAGE_KERNEL); | |
1429 | ||
1430 | pgprot_t PAGE_KERNEL_LOCKED __read_mostly; | |
1431 | pgprot_t PAGE_COPY __read_mostly; | |
0f15952a DM |
1432 | |
1433 | pgprot_t PAGE_SHARED __read_mostly; | |
1434 | EXPORT_SYMBOL(PAGE_SHARED); | |
1435 | ||
c4bce90e DM |
1436 | pgprot_t PAGE_EXEC __read_mostly; |
1437 | unsigned long pg_iobits __read_mostly; | |
1438 | ||
1439 | unsigned long _PAGE_IE __read_mostly; | |
b2bef442 | 1440 | |
c4bce90e | 1441 | unsigned long _PAGE_E __read_mostly; |
b2bef442 DM |
1442 | EXPORT_SYMBOL(_PAGE_E); |
1443 | ||
c4bce90e | 1444 | unsigned long _PAGE_CACHE __read_mostly; |
b2bef442 | 1445 | EXPORT_SYMBOL(_PAGE_CACHE); |
c4bce90e DM |
1446 | |
1447 | static void prot_init_common(unsigned long page_none, | |
1448 | unsigned long page_shared, | |
1449 | unsigned long page_copy, | |
1450 | unsigned long page_readonly, | |
1451 | unsigned long page_exec_bit) | |
1452 | { | |
1453 | PAGE_COPY = __pgprot(page_copy); | |
0f15952a | 1454 | PAGE_SHARED = __pgprot(page_shared); |
c4bce90e DM |
1455 | |
1456 | protection_map[0x0] = __pgprot(page_none); | |
1457 | protection_map[0x1] = __pgprot(page_readonly & ~page_exec_bit); | |
1458 | protection_map[0x2] = __pgprot(page_copy & ~page_exec_bit); | |
1459 | protection_map[0x3] = __pgprot(page_copy & ~page_exec_bit); | |
1460 | protection_map[0x4] = __pgprot(page_readonly); | |
1461 | protection_map[0x5] = __pgprot(page_readonly); | |
1462 | protection_map[0x6] = __pgprot(page_copy); | |
1463 | protection_map[0x7] = __pgprot(page_copy); | |
1464 | protection_map[0x8] = __pgprot(page_none); | |
1465 | protection_map[0x9] = __pgprot(page_readonly & ~page_exec_bit); | |
1466 | protection_map[0xa] = __pgprot(page_shared & ~page_exec_bit); | |
1467 | protection_map[0xb] = __pgprot(page_shared & ~page_exec_bit); | |
1468 | protection_map[0xc] = __pgprot(page_readonly); | |
1469 | protection_map[0xd] = __pgprot(page_readonly); | |
1470 | protection_map[0xe] = __pgprot(page_shared); | |
1471 | protection_map[0xf] = __pgprot(page_shared); | |
1472 | } | |
1473 | ||
1474 | static void __init sun4u_pgprot_init(void) | |
1475 | { | |
1476 | unsigned long page_none, page_shared, page_copy, page_readonly; | |
1477 | unsigned long page_exec_bit; | |
1478 | ||
1479 | PAGE_KERNEL = __pgprot (_PAGE_PRESENT_4U | _PAGE_VALID | | |
1480 | _PAGE_CACHE_4U | _PAGE_P_4U | | |
1481 | __ACCESS_BITS_4U | __DIRTY_BITS_4U | | |
1482 | _PAGE_EXEC_4U); | |
1483 | PAGE_KERNEL_LOCKED = __pgprot (_PAGE_PRESENT_4U | _PAGE_VALID | | |
1484 | _PAGE_CACHE_4U | _PAGE_P_4U | | |
1485 | __ACCESS_BITS_4U | __DIRTY_BITS_4U | | |
1486 | _PAGE_EXEC_4U | _PAGE_L_4U); | |
1487 | PAGE_EXEC = __pgprot(_PAGE_EXEC_4U); | |
1488 | ||
1489 | _PAGE_IE = _PAGE_IE_4U; | |
1490 | _PAGE_E = _PAGE_E_4U; | |
1491 | _PAGE_CACHE = _PAGE_CACHE_4U; | |
1492 | ||
1493 | pg_iobits = (_PAGE_VALID | _PAGE_PRESENT_4U | __DIRTY_BITS_4U | | |
1494 | __ACCESS_BITS_4U | _PAGE_E_4U); | |
1495 | ||
9cc3a1ac | 1496 | kern_linear_pte_xor[0] = (_PAGE_VALID | _PAGE_SZ4MB_4U) ^ |
c4bce90e | 1497 | 0xfffff80000000000; |
9cc3a1ac DM |
1498 | kern_linear_pte_xor[0] |= (_PAGE_CP_4U | _PAGE_CV_4U | |
1499 | _PAGE_P_4U | _PAGE_W_4U); | |
1500 | ||
1501 | /* XXX Should use 256MB on Panther. XXX */ | |
1502 | kern_linear_pte_xor[1] = kern_linear_pte_xor[0]; | |
c4bce90e DM |
1503 | |
1504 | _PAGE_SZBITS = _PAGE_SZBITS_4U; | |
1505 | _PAGE_ALL_SZ_BITS = (_PAGE_SZ4MB_4U | _PAGE_SZ512K_4U | | |
1506 | _PAGE_SZ64K_4U | _PAGE_SZ8K_4U | | |
1507 | _PAGE_SZ32MB_4U | _PAGE_SZ256MB_4U); | |
1508 | ||
1509 | ||
1510 | page_none = _PAGE_PRESENT_4U | _PAGE_ACCESSED_4U | _PAGE_CACHE_4U; | |
1511 | page_shared = (_PAGE_VALID | _PAGE_PRESENT_4U | _PAGE_CACHE_4U | | |
1512 | __ACCESS_BITS_4U | _PAGE_WRITE_4U | _PAGE_EXEC_4U); | |
1513 | page_copy = (_PAGE_VALID | _PAGE_PRESENT_4U | _PAGE_CACHE_4U | | |
1514 | __ACCESS_BITS_4U | _PAGE_EXEC_4U); | |
1515 | page_readonly = (_PAGE_VALID | _PAGE_PRESENT_4U | _PAGE_CACHE_4U | | |
1516 | __ACCESS_BITS_4U | _PAGE_EXEC_4U); | |
1517 | ||
1518 | page_exec_bit = _PAGE_EXEC_4U; | |
1519 | ||
1520 | prot_init_common(page_none, page_shared, page_copy, page_readonly, | |
1521 | page_exec_bit); | |
1522 | } | |
1523 | ||
1524 | static void __init sun4v_pgprot_init(void) | |
1525 | { | |
1526 | unsigned long page_none, page_shared, page_copy, page_readonly; | |
1527 | unsigned long page_exec_bit; | |
1528 | ||
1529 | PAGE_KERNEL = __pgprot (_PAGE_PRESENT_4V | _PAGE_VALID | | |
1530 | _PAGE_CACHE_4V | _PAGE_P_4V | | |
1531 | __ACCESS_BITS_4V | __DIRTY_BITS_4V | | |
1532 | _PAGE_EXEC_4V); | |
1533 | PAGE_KERNEL_LOCKED = PAGE_KERNEL; | |
1534 | PAGE_EXEC = __pgprot(_PAGE_EXEC_4V); | |
1535 | ||
1536 | _PAGE_IE = _PAGE_IE_4V; | |
1537 | _PAGE_E = _PAGE_E_4V; | |
1538 | _PAGE_CACHE = _PAGE_CACHE_4V; | |
1539 | ||
9cc3a1ac DM |
1540 | kern_linear_pte_xor[0] = (_PAGE_VALID | _PAGE_SZ4MB_4V) ^ |
1541 | 0xfffff80000000000; | |
1542 | kern_linear_pte_xor[0] |= (_PAGE_CP_4V | _PAGE_CV_4V | | |
1543 | _PAGE_P_4V | _PAGE_W_4V); | |
1544 | ||
1545 | kern_linear_pte_xor[1] = (_PAGE_VALID | _PAGE_SZ256MB_4V) ^ | |
c4bce90e | 1546 | 0xfffff80000000000; |
9cc3a1ac DM |
1547 | kern_linear_pte_xor[1] |= (_PAGE_CP_4V | _PAGE_CV_4V | |
1548 | _PAGE_P_4V | _PAGE_W_4V); | |
c4bce90e DM |
1549 | |
1550 | pg_iobits = (_PAGE_VALID | _PAGE_PRESENT_4V | __DIRTY_BITS_4V | | |
1551 | __ACCESS_BITS_4V | _PAGE_E_4V); | |
1552 | ||
1553 | _PAGE_SZBITS = _PAGE_SZBITS_4V; | |
1554 | _PAGE_ALL_SZ_BITS = (_PAGE_SZ16GB_4V | _PAGE_SZ2GB_4V | | |
1555 | _PAGE_SZ256MB_4V | _PAGE_SZ32MB_4V | | |
1556 | _PAGE_SZ4MB_4V | _PAGE_SZ512K_4V | | |
1557 | _PAGE_SZ64K_4V | _PAGE_SZ8K_4V); | |
1558 | ||
1559 | page_none = _PAGE_PRESENT_4V | _PAGE_ACCESSED_4V | _PAGE_CACHE_4V; | |
1560 | page_shared = (_PAGE_VALID | _PAGE_PRESENT_4V | _PAGE_CACHE_4V | | |
1561 | __ACCESS_BITS_4V | _PAGE_WRITE_4V | _PAGE_EXEC_4V); | |
1562 | page_copy = (_PAGE_VALID | _PAGE_PRESENT_4V | _PAGE_CACHE_4V | | |
1563 | __ACCESS_BITS_4V | _PAGE_EXEC_4V); | |
1564 | page_readonly = (_PAGE_VALID | _PAGE_PRESENT_4V | _PAGE_CACHE_4V | | |
1565 | __ACCESS_BITS_4V | _PAGE_EXEC_4V); | |
1566 | ||
1567 | page_exec_bit = _PAGE_EXEC_4V; | |
1568 | ||
1569 | prot_init_common(page_none, page_shared, page_copy, page_readonly, | |
1570 | page_exec_bit); | |
1571 | } | |
1572 | ||
1573 | unsigned long pte_sz_bits(unsigned long sz) | |
1574 | { | |
1575 | if (tlb_type == hypervisor) { | |
1576 | switch (sz) { | |
1577 | case 8 * 1024: | |
1578 | default: | |
1579 | return _PAGE_SZ8K_4V; | |
1580 | case 64 * 1024: | |
1581 | return _PAGE_SZ64K_4V; | |
1582 | case 512 * 1024: | |
1583 | return _PAGE_SZ512K_4V; | |
1584 | case 4 * 1024 * 1024: | |
1585 | return _PAGE_SZ4MB_4V; | |
1586 | }; | |
1587 | } else { | |
1588 | switch (sz) { | |
1589 | case 8 * 1024: | |
1590 | default: | |
1591 | return _PAGE_SZ8K_4U; | |
1592 | case 64 * 1024: | |
1593 | return _PAGE_SZ64K_4U; | |
1594 | case 512 * 1024: | |
1595 | return _PAGE_SZ512K_4U; | |
1596 | case 4 * 1024 * 1024: | |
1597 | return _PAGE_SZ4MB_4U; | |
1598 | }; | |
1599 | } | |
1600 | } | |
1601 | ||
1602 | pte_t mk_pte_io(unsigned long page, pgprot_t prot, int space, unsigned long page_size) | |
1603 | { | |
1604 | pte_t pte; | |
cf627156 DM |
1605 | |
1606 | pte_val(pte) = page | pgprot_val(pgprot_noncached(prot)); | |
c4bce90e DM |
1607 | pte_val(pte) |= (((unsigned long)space) << 32); |
1608 | pte_val(pte) |= pte_sz_bits(page_size); | |
c4bce90e | 1609 | |
cf627156 | 1610 | return pte; |
c4bce90e DM |
1611 | } |
1612 | ||
1613 | static unsigned long kern_large_tte(unsigned long paddr) | |
1614 | { | |
1615 | unsigned long val; | |
1616 | ||
1617 | val = (_PAGE_VALID | _PAGE_SZ4MB_4U | | |
1618 | _PAGE_CP_4U | _PAGE_CV_4U | _PAGE_P_4U | | |
1619 | _PAGE_EXEC_4U | _PAGE_L_4U | _PAGE_W_4U); | |
1620 | if (tlb_type == hypervisor) | |
1621 | val = (_PAGE_VALID | _PAGE_SZ4MB_4V | | |
1622 | _PAGE_CP_4V | _PAGE_CV_4V | _PAGE_P_4V | | |
1623 | _PAGE_EXEC_4V | _PAGE_W_4V); | |
1624 | ||
1625 | return val | paddr; | |
1626 | } | |
1627 | ||
1628 | /* | |
1629 | * Translate PROM's mapping we capture at boot time into physical address. | |
1630 | * The second parameter is only set from prom_callback() invocations. | |
1631 | */ | |
1632 | unsigned long prom_virt_to_phys(unsigned long promva, int *error) | |
1633 | { | |
1634 | unsigned long mask; | |
1635 | int i; | |
1636 | ||
1637 | mask = _PAGE_PADDR_4U; | |
1638 | if (tlb_type == hypervisor) | |
1639 | mask = _PAGE_PADDR_4V; | |
1640 | ||
1641 | for (i = 0; i < prom_trans_ents; i++) { | |
1642 | struct linux_prom_translation *p = &prom_trans[i]; | |
1643 | ||
1644 | if (promva >= p->virt && | |
1645 | promva < (p->virt + p->size)) { | |
1646 | unsigned long base = p->data & mask; | |
1647 | ||
1648 | if (error) | |
1649 | *error = 0; | |
1650 | return base + (promva & (8192 - 1)); | |
1651 | } | |
1652 | } | |
1653 | if (error) | |
1654 | *error = 1; | |
1655 | return 0UL; | |
1656 | } | |
1657 | ||
1658 | /* XXX We should kill off this ugly thing at so me point. XXX */ | |
1659 | unsigned long sun4u_get_pte(unsigned long addr) | |
1660 | { | |
1661 | pgd_t *pgdp; | |
1662 | pud_t *pudp; | |
1663 | pmd_t *pmdp; | |
1664 | pte_t *ptep; | |
1665 | unsigned long mask = _PAGE_PADDR_4U; | |
1666 | ||
1667 | if (tlb_type == hypervisor) | |
1668 | mask = _PAGE_PADDR_4V; | |
1669 | ||
1670 | if (addr >= PAGE_OFFSET) | |
1671 | return addr & mask; | |
1672 | ||
1673 | if ((addr >= LOW_OBP_ADDRESS) && (addr < HI_OBP_ADDRESS)) | |
1674 | return prom_virt_to_phys(addr, NULL); | |
1675 | ||
1676 | pgdp = pgd_offset_k(addr); | |
1677 | pudp = pud_offset(pgdp, addr); | |
1678 | pmdp = pmd_offset(pudp, addr); | |
1679 | ptep = pte_offset_kernel(pmdp, addr); | |
1680 | ||
1681 | return pte_val(*ptep) & mask; | |
1682 | } | |
1683 | ||
1684 | /* If not locked, zap it. */ | |
1685 | void __flush_tlb_all(void) | |
1686 | { | |
1687 | unsigned long pstate; | |
1688 | int i; | |
1689 | ||
1690 | __asm__ __volatile__("flushw\n\t" | |
1691 | "rdpr %%pstate, %0\n\t" | |
1692 | "wrpr %0, %1, %%pstate" | |
1693 | : "=r" (pstate) | |
1694 | : "i" (PSTATE_IE)); | |
1695 | if (tlb_type == spitfire) { | |
1696 | for (i = 0; i < 64; i++) { | |
1697 | /* Spitfire Errata #32 workaround */ | |
1698 | /* NOTE: Always runs on spitfire, so no | |
1699 | * cheetah+ page size encodings. | |
1700 | */ | |
1701 | __asm__ __volatile__("stxa %0, [%1] %2\n\t" | |
1702 | "flush %%g6" | |
1703 | : /* No outputs */ | |
1704 | : "r" (0), | |
1705 | "r" (PRIMARY_CONTEXT), "i" (ASI_DMMU)); | |
1706 | ||
1707 | if (!(spitfire_get_dtlb_data(i) & _PAGE_L_4U)) { | |
1708 | __asm__ __volatile__("stxa %%g0, [%0] %1\n\t" | |
1709 | "membar #Sync" | |
1710 | : /* no outputs */ | |
1711 | : "r" (TLB_TAG_ACCESS), "i" (ASI_DMMU)); | |
1712 | spitfire_put_dtlb_data(i, 0x0UL); | |
1713 | } | |
1714 | ||
1715 | /* Spitfire Errata #32 workaround */ | |
1716 | /* NOTE: Always runs on spitfire, so no | |
1717 | * cheetah+ page size encodings. | |
1718 | */ | |
1719 | __asm__ __volatile__("stxa %0, [%1] %2\n\t" | |
1720 | "flush %%g6" | |
1721 | : /* No outputs */ | |
1722 | : "r" (0), | |
1723 | "r" (PRIMARY_CONTEXT), "i" (ASI_DMMU)); | |
1724 | ||
1725 | if (!(spitfire_get_itlb_data(i) & _PAGE_L_4U)) { | |
1726 | __asm__ __volatile__("stxa %%g0, [%0] %1\n\t" | |
1727 | "membar #Sync" | |
1728 | : /* no outputs */ | |
1729 | : "r" (TLB_TAG_ACCESS), "i" (ASI_IMMU)); | |
1730 | spitfire_put_itlb_data(i, 0x0UL); | |
1731 | } | |
1732 | } | |
1733 | } else if (tlb_type == cheetah || tlb_type == cheetah_plus) { | |
1734 | cheetah_flush_dtlb_all(); | |
1735 | cheetah_flush_itlb_all(); | |
1736 | } | |
1737 | __asm__ __volatile__("wrpr %0, 0, %%pstate" | |
1738 | : : "r" (pstate)); | |
1739 | } |