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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 | 132 | |
d1112018 | 133 | /* Kernel physical address base and size in bytes. */ |
1ac4f5eb DM |
134 | unsigned long kern_base __read_mostly; |
135 | unsigned long kern_size __read_mostly; | |
1da177e4 | 136 | |
1da177e4 LT |
137 | /* get_new_mmu_context() uses "cache + 1". */ |
138 | DEFINE_SPINLOCK(ctx_alloc_lock); | |
139 | unsigned long tlb_context_cache = CTX_FIRST_VERSION - 1; | |
140 | #define CTX_BMAP_SLOTS (1UL << (CTX_NR_BITS - 6)) | |
141 | unsigned long mmu_context_bmap[CTX_BMAP_SLOTS]; | |
142 | ||
143 | /* References to special section boundaries */ | |
144 | extern char _start[], _end[]; | |
145 | ||
146 | /* Initial ramdisk setup */ | |
147 | extern unsigned long sparc_ramdisk_image64; | |
148 | extern unsigned int sparc_ramdisk_image; | |
149 | extern unsigned int sparc_ramdisk_size; | |
150 | ||
1ac4f5eb | 151 | struct page *mem_map_zero __read_mostly; |
1da177e4 | 152 | |
0835ae0f DM |
153 | unsigned int sparc64_highest_unlocked_tlb_ent __read_mostly; |
154 | ||
155 | unsigned long sparc64_kern_pri_context __read_mostly; | |
156 | unsigned long sparc64_kern_pri_nuc_bits __read_mostly; | |
157 | unsigned long sparc64_kern_sec_context __read_mostly; | |
158 | ||
1da177e4 LT |
159 | int bigkernel = 0; |
160 | ||
3c936465 | 161 | kmem_cache_t *pgtable_cache __read_mostly; |
1da177e4 | 162 | |
3c936465 DM |
163 | static void zero_ctor(void *addr, kmem_cache_t *cache, unsigned long flags) |
164 | { | |
165 | clear_page(addr); | |
166 | } | |
05e28f9d | 167 | |
9b4006dc DM |
168 | extern void tsb_cache_init(void); |
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) { | |
9b4006dc | 179 | prom_printf("Could not create pgtable_cache\n"); |
3c936465 | 180 | prom_halt(); |
1da177e4 | 181 | } |
9b4006dc | 182 | tsb_cache_init(); |
1da177e4 LT |
183 | } |
184 | ||
185 | #ifdef CONFIG_DEBUG_DCFLUSH | |
186 | atomic_t dcpage_flushes = ATOMIC_INIT(0); | |
187 | #ifdef CONFIG_SMP | |
188 | atomic_t dcpage_flushes_xcall = ATOMIC_INIT(0); | |
189 | #endif | |
190 | #endif | |
191 | ||
7a591cfe | 192 | inline void flush_dcache_page_impl(struct page *page) |
1da177e4 | 193 | { |
7a591cfe | 194 | BUG_ON(tlb_type == hypervisor); |
1da177e4 LT |
195 | #ifdef CONFIG_DEBUG_DCFLUSH |
196 | atomic_inc(&dcpage_flushes); | |
197 | #endif | |
198 | ||
199 | #ifdef DCACHE_ALIASING_POSSIBLE | |
200 | __flush_dcache_page(page_address(page), | |
201 | ((tlb_type == spitfire) && | |
202 | page_mapping(page) != NULL)); | |
203 | #else | |
204 | if (page_mapping(page) != NULL && | |
205 | tlb_type == spitfire) | |
206 | __flush_icache_page(__pa(page_address(page))); | |
207 | #endif | |
208 | } | |
209 | ||
210 | #define PG_dcache_dirty PG_arch_1 | |
17b0e199 DM |
211 | #define PG_dcache_cpu_shift 24UL |
212 | #define PG_dcache_cpu_mask (256UL - 1UL) | |
48b0e548 DM |
213 | |
214 | #if NR_CPUS > 256 | |
215 | #error D-cache dirty tracking and thread_info->cpu need fixing for > 256 cpus | |
216 | #endif | |
1da177e4 LT |
217 | |
218 | #define dcache_dirty_cpu(page) \ | |
48b0e548 | 219 | (((page)->flags >> PG_dcache_cpu_shift) & PG_dcache_cpu_mask) |
1da177e4 LT |
220 | |
221 | static __inline__ void set_dcache_dirty(struct page *page, int this_cpu) | |
222 | { | |
223 | unsigned long mask = this_cpu; | |
48b0e548 DM |
224 | unsigned long non_cpu_bits; |
225 | ||
226 | non_cpu_bits = ~(PG_dcache_cpu_mask << PG_dcache_cpu_shift); | |
227 | mask = (mask << PG_dcache_cpu_shift) | (1UL << PG_dcache_dirty); | |
228 | ||
1da177e4 LT |
229 | __asm__ __volatile__("1:\n\t" |
230 | "ldx [%2], %%g7\n\t" | |
231 | "and %%g7, %1, %%g1\n\t" | |
232 | "or %%g1, %0, %%g1\n\t" | |
233 | "casx [%2], %%g7, %%g1\n\t" | |
234 | "cmp %%g7, %%g1\n\t" | |
b445e26c | 235 | "membar #StoreLoad | #StoreStore\n\t" |
1da177e4 | 236 | "bne,pn %%xcc, 1b\n\t" |
b445e26c | 237 | " nop" |
1da177e4 LT |
238 | : /* no outputs */ |
239 | : "r" (mask), "r" (non_cpu_bits), "r" (&page->flags) | |
240 | : "g1", "g7"); | |
241 | } | |
242 | ||
243 | static __inline__ void clear_dcache_dirty_cpu(struct page *page, unsigned long cpu) | |
244 | { | |
245 | unsigned long mask = (1UL << PG_dcache_dirty); | |
246 | ||
247 | __asm__ __volatile__("! test_and_clear_dcache_dirty\n" | |
248 | "1:\n\t" | |
249 | "ldx [%2], %%g7\n\t" | |
48b0e548 | 250 | "srlx %%g7, %4, %%g1\n\t" |
1da177e4 LT |
251 | "and %%g1, %3, %%g1\n\t" |
252 | "cmp %%g1, %0\n\t" | |
253 | "bne,pn %%icc, 2f\n\t" | |
254 | " andn %%g7, %1, %%g1\n\t" | |
255 | "casx [%2], %%g7, %%g1\n\t" | |
256 | "cmp %%g7, %%g1\n\t" | |
b445e26c | 257 | "membar #StoreLoad | #StoreStore\n\t" |
1da177e4 | 258 | "bne,pn %%xcc, 1b\n\t" |
b445e26c | 259 | " nop\n" |
1da177e4 LT |
260 | "2:" |
261 | : /* no outputs */ | |
262 | : "r" (cpu), "r" (mask), "r" (&page->flags), | |
48b0e548 DM |
263 | "i" (PG_dcache_cpu_mask), |
264 | "i" (PG_dcache_cpu_shift) | |
1da177e4 LT |
265 | : "g1", "g7"); |
266 | } | |
267 | ||
517af332 DM |
268 | static inline void tsb_insert(struct tsb *ent, unsigned long tag, unsigned long pte) |
269 | { | |
270 | unsigned long tsb_addr = (unsigned long) ent; | |
271 | ||
3b3ab2eb | 272 | if (tlb_type == cheetah_plus || tlb_type == hypervisor) |
517af332 DM |
273 | tsb_addr = __pa(tsb_addr); |
274 | ||
275 | __tsb_insert(tsb_addr, tag, pte); | |
276 | } | |
277 | ||
c4bce90e DM |
278 | unsigned long _PAGE_ALL_SZ_BITS __read_mostly; |
279 | unsigned long _PAGE_SZBITS __read_mostly; | |
280 | ||
1da177e4 LT |
281 | void update_mmu_cache(struct vm_area_struct *vma, unsigned long address, pte_t pte) |
282 | { | |
bd40791e | 283 | struct mm_struct *mm; |
74ae9987 | 284 | struct tsb *tsb; |
7a1ac526 | 285 | unsigned long tag, flags; |
7a591cfe DM |
286 | |
287 | if (tlb_type != hypervisor) { | |
288 | unsigned long pfn = pte_pfn(pte); | |
289 | unsigned long pg_flags; | |
290 | struct page *page; | |
291 | ||
292 | if (pfn_valid(pfn) && | |
293 | (page = pfn_to_page(pfn), page_mapping(page)) && | |
294 | ((pg_flags = page->flags) & (1UL << PG_dcache_dirty))) { | |
295 | int cpu = ((pg_flags >> PG_dcache_cpu_shift) & | |
296 | PG_dcache_cpu_mask); | |
297 | int this_cpu = get_cpu(); | |
298 | ||
299 | /* This is just to optimize away some function calls | |
300 | * in the SMP case. | |
301 | */ | |
302 | if (cpu == this_cpu) | |
303 | flush_dcache_page_impl(page); | |
304 | else | |
305 | smp_flush_dcache_page_impl(page, cpu); | |
306 | ||
307 | clear_dcache_dirty_cpu(page, cpu); | |
308 | ||
309 | put_cpu(); | |
310 | } | |
1da177e4 | 311 | } |
bd40791e DM |
312 | |
313 | mm = vma->vm_mm; | |
7a1ac526 DM |
314 | |
315 | spin_lock_irqsave(&mm->context.lock, flags); | |
316 | ||
74ae9987 DM |
317 | tsb = &mm->context.tsb[(address >> PAGE_SHIFT) & |
318 | (mm->context.tsb_nentries - 1UL)]; | |
319 | tag = (address >> 22UL); | |
320 | tsb_insert(tsb, tag, pte_val(pte)); | |
7a1ac526 DM |
321 | |
322 | spin_unlock_irqrestore(&mm->context.lock, flags); | |
1da177e4 LT |
323 | } |
324 | ||
325 | void flush_dcache_page(struct page *page) | |
326 | { | |
a9546f59 DM |
327 | struct address_space *mapping; |
328 | int this_cpu; | |
1da177e4 | 329 | |
7a591cfe DM |
330 | if (tlb_type == hypervisor) |
331 | return; | |
332 | ||
a9546f59 DM |
333 | /* Do not bother with the expensive D-cache flush if it |
334 | * is merely the zero page. The 'bigcore' testcase in GDB | |
335 | * causes this case to run millions of times. | |
336 | */ | |
337 | if (page == ZERO_PAGE(0)) | |
338 | return; | |
339 | ||
340 | this_cpu = get_cpu(); | |
341 | ||
342 | mapping = page_mapping(page); | |
1da177e4 | 343 | if (mapping && !mapping_mapped(mapping)) { |
a9546f59 | 344 | int dirty = test_bit(PG_dcache_dirty, &page->flags); |
1da177e4 | 345 | if (dirty) { |
a9546f59 DM |
346 | int dirty_cpu = dcache_dirty_cpu(page); |
347 | ||
1da177e4 LT |
348 | if (dirty_cpu == this_cpu) |
349 | goto out; | |
350 | smp_flush_dcache_page_impl(page, dirty_cpu); | |
351 | } | |
352 | set_dcache_dirty(page, this_cpu); | |
353 | } else { | |
354 | /* We could delay the flush for the !page_mapping | |
355 | * case too. But that case is for exec env/arg | |
356 | * pages and those are %99 certainly going to get | |
357 | * faulted into the tlb (and thus flushed) anyways. | |
358 | */ | |
359 | flush_dcache_page_impl(page); | |
360 | } | |
361 | ||
362 | out: | |
363 | put_cpu(); | |
364 | } | |
365 | ||
05e14cb3 | 366 | void __kprobes flush_icache_range(unsigned long start, unsigned long end) |
1da177e4 | 367 | { |
a43fe0e7 | 368 | /* Cheetah and Hypervisor platform cpus have coherent I-cache. */ |
1da177e4 LT |
369 | if (tlb_type == spitfire) { |
370 | unsigned long kaddr; | |
371 | ||
372 | for (kaddr = start; kaddr < end; kaddr += PAGE_SIZE) | |
373 | __flush_icache_page(__get_phys(kaddr)); | |
374 | } | |
375 | } | |
376 | ||
1da177e4 LT |
377 | void show_mem(void) |
378 | { | |
379 | printk("Mem-info:\n"); | |
380 | show_free_areas(); | |
381 | printk("Free swap: %6ldkB\n", | |
382 | nr_swap_pages << (PAGE_SHIFT-10)); | |
383 | printk("%ld pages of RAM\n", num_physpages); | |
384 | printk("%d free pages\n", nr_free_pages()); | |
1da177e4 LT |
385 | } |
386 | ||
387 | void mmu_info(struct seq_file *m) | |
388 | { | |
389 | if (tlb_type == cheetah) | |
390 | seq_printf(m, "MMU Type\t: Cheetah\n"); | |
391 | else if (tlb_type == cheetah_plus) | |
392 | seq_printf(m, "MMU Type\t: Cheetah+\n"); | |
393 | else if (tlb_type == spitfire) | |
394 | seq_printf(m, "MMU Type\t: Spitfire\n"); | |
a43fe0e7 DM |
395 | else if (tlb_type == hypervisor) |
396 | seq_printf(m, "MMU Type\t: Hypervisor (sun4v)\n"); | |
1da177e4 LT |
397 | else |
398 | seq_printf(m, "MMU Type\t: ???\n"); | |
399 | ||
400 | #ifdef CONFIG_DEBUG_DCFLUSH | |
401 | seq_printf(m, "DCPageFlushes\t: %d\n", | |
402 | atomic_read(&dcpage_flushes)); | |
403 | #ifdef CONFIG_SMP | |
404 | seq_printf(m, "DCPageFlushesXC\t: %d\n", | |
405 | atomic_read(&dcpage_flushes_xcall)); | |
406 | #endif /* CONFIG_SMP */ | |
407 | #endif /* CONFIG_DEBUG_DCFLUSH */ | |
408 | } | |
409 | ||
410 | struct linux_prom_translation { | |
411 | unsigned long virt; | |
412 | unsigned long size; | |
413 | unsigned long data; | |
414 | }; | |
c9c10830 DM |
415 | |
416 | /* Exported for kernel TLB miss handling in ktlb.S */ | |
417 | struct linux_prom_translation prom_trans[512] __read_mostly; | |
418 | unsigned int prom_trans_ents __read_mostly; | |
1da177e4 | 419 | |
1da177e4 LT |
420 | /* Exported for SMP bootup purposes. */ |
421 | unsigned long kern_locked_tte_data; | |
422 | ||
c9c10830 DM |
423 | /* The obp translations are saved based on 8k pagesize, since obp can |
424 | * use a mixture of pagesizes. Misses to the LOW_OBP_ADDRESS -> | |
74bf4312 | 425 | * HI_OBP_ADDRESS range are handled in ktlb.S. |
c9c10830 | 426 | */ |
5085b4a5 DM |
427 | static inline int in_obp_range(unsigned long vaddr) |
428 | { | |
429 | return (vaddr >= LOW_OBP_ADDRESS && | |
430 | vaddr < HI_OBP_ADDRESS); | |
431 | } | |
432 | ||
c9c10830 | 433 | static int cmp_ptrans(const void *a, const void *b) |
405599bd | 434 | { |
c9c10830 | 435 | const struct linux_prom_translation *x = a, *y = b; |
405599bd | 436 | |
c9c10830 DM |
437 | if (x->virt > y->virt) |
438 | return 1; | |
439 | if (x->virt < y->virt) | |
440 | return -1; | |
441 | return 0; | |
405599bd DM |
442 | } |
443 | ||
c9c10830 | 444 | /* Read OBP translations property into 'prom_trans[]'. */ |
9ad98c5b | 445 | static void __init read_obp_translations(void) |
405599bd | 446 | { |
c9c10830 | 447 | int n, node, ents, first, last, i; |
1da177e4 LT |
448 | |
449 | node = prom_finddevice("/virtual-memory"); | |
450 | n = prom_getproplen(node, "translations"); | |
405599bd | 451 | if (unlikely(n == 0 || n == -1)) { |
b206fc4c | 452 | prom_printf("prom_mappings: Couldn't get size.\n"); |
1da177e4 LT |
453 | prom_halt(); |
454 | } | |
405599bd DM |
455 | if (unlikely(n > sizeof(prom_trans))) { |
456 | prom_printf("prom_mappings: Size %Zd is too big.\n", n); | |
1da177e4 LT |
457 | prom_halt(); |
458 | } | |
405599bd | 459 | |
b206fc4c | 460 | if ((n = prom_getproperty(node, "translations", |
405599bd DM |
461 | (char *)&prom_trans[0], |
462 | sizeof(prom_trans))) == -1) { | |
b206fc4c | 463 | prom_printf("prom_mappings: Couldn't get property.\n"); |
1da177e4 LT |
464 | prom_halt(); |
465 | } | |
9ad98c5b | 466 | |
b206fc4c | 467 | n = n / sizeof(struct linux_prom_translation); |
9ad98c5b | 468 | |
c9c10830 DM |
469 | ents = n; |
470 | ||
471 | sort(prom_trans, ents, sizeof(struct linux_prom_translation), | |
472 | cmp_ptrans, NULL); | |
473 | ||
474 | /* Now kick out all the non-OBP entries. */ | |
475 | for (i = 0; i < ents; i++) { | |
476 | if (in_obp_range(prom_trans[i].virt)) | |
477 | break; | |
478 | } | |
479 | first = i; | |
480 | for (; i < ents; i++) { | |
481 | if (!in_obp_range(prom_trans[i].virt)) | |
482 | break; | |
483 | } | |
484 | last = i; | |
485 | ||
486 | for (i = 0; i < (last - first); i++) { | |
487 | struct linux_prom_translation *src = &prom_trans[i + first]; | |
488 | struct linux_prom_translation *dest = &prom_trans[i]; | |
489 | ||
490 | *dest = *src; | |
491 | } | |
492 | for (; i < ents; i++) { | |
493 | struct linux_prom_translation *dest = &prom_trans[i]; | |
494 | dest->virt = dest->size = dest->data = 0x0UL; | |
495 | } | |
496 | ||
497 | prom_trans_ents = last - first; | |
498 | ||
499 | if (tlb_type == spitfire) { | |
500 | /* Clear diag TTE bits. */ | |
501 | for (i = 0; i < prom_trans_ents; i++) | |
502 | prom_trans[i].data &= ~0x0003fe0000000000UL; | |
503 | } | |
405599bd | 504 | } |
1da177e4 | 505 | |
d82ace7d DM |
506 | static void __init hypervisor_tlb_lock(unsigned long vaddr, |
507 | unsigned long pte, | |
508 | unsigned long mmu) | |
509 | { | |
164c220f DM |
510 | register unsigned long func asm("%o5"); |
511 | register unsigned long arg0 asm("%o0"); | |
512 | register unsigned long arg1 asm("%o1"); | |
513 | register unsigned long arg2 asm("%o2"); | |
514 | register unsigned long arg3 asm("%o3"); | |
d82ace7d DM |
515 | |
516 | func = HV_FAST_MMU_MAP_PERM_ADDR; | |
517 | arg0 = vaddr; | |
518 | arg1 = 0; | |
519 | arg2 = pte; | |
520 | arg3 = mmu; | |
521 | __asm__ __volatile__("ta 0x80" | |
522 | : "=&r" (func), "=&r" (arg0), | |
523 | "=&r" (arg1), "=&r" (arg2), | |
524 | "=&r" (arg3) | |
525 | : "0" (func), "1" (arg0), "2" (arg1), | |
526 | "3" (arg2), "4" (arg3)); | |
12e126ad DM |
527 | if (arg0 != 0) { |
528 | prom_printf("hypervisor_tlb_lock[%lx:%lx:%lx:%lx]: " | |
529 | "errors with %lx\n", vaddr, 0, pte, mmu, arg0); | |
530 | prom_halt(); | |
531 | } | |
d82ace7d DM |
532 | } |
533 | ||
c4bce90e DM |
534 | static unsigned long kern_large_tte(unsigned long paddr); |
535 | ||
898cf0ec | 536 | static void __init remap_kernel(void) |
405599bd DM |
537 | { |
538 | unsigned long phys_page, tte_vaddr, tte_data; | |
405599bd DM |
539 | int tlb_ent = sparc64_highest_locked_tlbent(); |
540 | ||
1da177e4 | 541 | tte_vaddr = (unsigned long) KERNBASE; |
bff06d55 | 542 | phys_page = (prom_boot_mapping_phys_low >> 22UL) << 22UL; |
c4bce90e | 543 | tte_data = kern_large_tte(phys_page); |
1da177e4 LT |
544 | |
545 | kern_locked_tte_data = tte_data; | |
546 | ||
d82ace7d DM |
547 | /* Now lock us into the TLBs via Hypervisor or OBP. */ |
548 | if (tlb_type == hypervisor) { | |
549 | hypervisor_tlb_lock(tte_vaddr, tte_data, HV_MMU_DMMU); | |
550 | hypervisor_tlb_lock(tte_vaddr, tte_data, HV_MMU_IMMU); | |
551 | if (bigkernel) { | |
552 | tte_vaddr += 0x400000; | |
553 | tte_data += 0x400000; | |
554 | hypervisor_tlb_lock(tte_vaddr, tte_data, HV_MMU_DMMU); | |
555 | hypervisor_tlb_lock(tte_vaddr, tte_data, HV_MMU_IMMU); | |
556 | } | |
557 | } else { | |
558 | prom_dtlb_load(tlb_ent, tte_data, tte_vaddr); | |
559 | prom_itlb_load(tlb_ent, tte_data, tte_vaddr); | |
560 | if (bigkernel) { | |
561 | tlb_ent -= 1; | |
562 | prom_dtlb_load(tlb_ent, | |
563 | tte_data + 0x400000, | |
564 | tte_vaddr + 0x400000); | |
565 | prom_itlb_load(tlb_ent, | |
566 | tte_data + 0x400000, | |
567 | tte_vaddr + 0x400000); | |
568 | } | |
569 | sparc64_highest_unlocked_tlb_ent = tlb_ent - 1; | |
1da177e4 | 570 | } |
0835ae0f DM |
571 | if (tlb_type == cheetah_plus) { |
572 | sparc64_kern_pri_context = (CTX_CHEETAH_PLUS_CTX0 | | |
573 | CTX_CHEETAH_PLUS_NUC); | |
574 | sparc64_kern_pri_nuc_bits = CTX_CHEETAH_PLUS_NUC; | |
575 | sparc64_kern_sec_context = CTX_CHEETAH_PLUS_CTX0; | |
576 | } | |
405599bd | 577 | } |
1da177e4 | 578 | |
405599bd | 579 | |
c9c10830 | 580 | static void __init inherit_prom_mappings(void) |
9ad98c5b DM |
581 | { |
582 | read_obp_translations(); | |
405599bd DM |
583 | |
584 | /* Now fixup OBP's idea about where we really are mapped. */ | |
585 | prom_printf("Remapping the kernel... "); | |
586 | remap_kernel(); | |
1da177e4 | 587 | prom_printf("done.\n"); |
1da177e4 LT |
588 | } |
589 | ||
1da177e4 LT |
590 | void prom_world(int enter) |
591 | { | |
1da177e4 LT |
592 | if (!enter) |
593 | set_fs((mm_segment_t) { get_thread_current_ds() }); | |
594 | ||
3487d1d4 | 595 | __asm__ __volatile__("flushw"); |
1da177e4 LT |
596 | } |
597 | ||
598 | #ifdef DCACHE_ALIASING_POSSIBLE | |
599 | void __flush_dcache_range(unsigned long start, unsigned long end) | |
600 | { | |
601 | unsigned long va; | |
602 | ||
603 | if (tlb_type == spitfire) { | |
604 | int n = 0; | |
605 | ||
606 | for (va = start; va < end; va += 32) { | |
607 | spitfire_put_dcache_tag(va & 0x3fe0, 0x0); | |
608 | if (++n >= 512) | |
609 | break; | |
610 | } | |
a43fe0e7 | 611 | } else if (tlb_type == cheetah || tlb_type == cheetah_plus) { |
1da177e4 LT |
612 | start = __pa(start); |
613 | end = __pa(end); | |
614 | for (va = start; va < end; va += 32) | |
615 | __asm__ __volatile__("stxa %%g0, [%0] %1\n\t" | |
616 | "membar #Sync" | |
617 | : /* no outputs */ | |
618 | : "r" (va), | |
619 | "i" (ASI_DCACHE_INVALIDATE)); | |
620 | } | |
621 | } | |
622 | #endif /* DCACHE_ALIASING_POSSIBLE */ | |
623 | ||
1da177e4 LT |
624 | /* Caller does TLB context flushing on local CPU if necessary. |
625 | * The caller also ensures that CTX_VALID(mm->context) is false. | |
626 | * | |
627 | * We must be careful about boundary cases so that we never | |
628 | * let the user have CTX 0 (nucleus) or we ever use a CTX | |
629 | * version of zero (and thus NO_CONTEXT would not be caught | |
630 | * by version mis-match tests in mmu_context.h). | |
a0663a79 DM |
631 | * |
632 | * Always invoked with interrupts disabled. | |
1da177e4 LT |
633 | */ |
634 | void get_new_mmu_context(struct mm_struct *mm) | |
635 | { | |
636 | unsigned long ctx, new_ctx; | |
637 | unsigned long orig_pgsz_bits; | |
a77754b4 | 638 | unsigned long flags; |
a0663a79 | 639 | int new_version; |
1da177e4 | 640 | |
a77754b4 | 641 | spin_lock_irqsave(&ctx_alloc_lock, flags); |
1da177e4 LT |
642 | orig_pgsz_bits = (mm->context.sparc64_ctx_val & CTX_PGSZ_MASK); |
643 | ctx = (tlb_context_cache + 1) & CTX_NR_MASK; | |
644 | new_ctx = find_next_zero_bit(mmu_context_bmap, 1 << CTX_NR_BITS, ctx); | |
a0663a79 | 645 | new_version = 0; |
1da177e4 LT |
646 | if (new_ctx >= (1 << CTX_NR_BITS)) { |
647 | new_ctx = find_next_zero_bit(mmu_context_bmap, ctx, 1); | |
648 | if (new_ctx >= ctx) { | |
649 | int i; | |
650 | new_ctx = (tlb_context_cache & CTX_VERSION_MASK) + | |
651 | CTX_FIRST_VERSION; | |
652 | if (new_ctx == 1) | |
653 | new_ctx = CTX_FIRST_VERSION; | |
654 | ||
655 | /* Don't call memset, for 16 entries that's just | |
656 | * plain silly... | |
657 | */ | |
658 | mmu_context_bmap[0] = 3; | |
659 | mmu_context_bmap[1] = 0; | |
660 | mmu_context_bmap[2] = 0; | |
661 | mmu_context_bmap[3] = 0; | |
662 | for (i = 4; i < CTX_BMAP_SLOTS; i += 4) { | |
663 | mmu_context_bmap[i + 0] = 0; | |
664 | mmu_context_bmap[i + 1] = 0; | |
665 | mmu_context_bmap[i + 2] = 0; | |
666 | mmu_context_bmap[i + 3] = 0; | |
667 | } | |
a0663a79 | 668 | new_version = 1; |
1da177e4 LT |
669 | goto out; |
670 | } | |
671 | } | |
672 | mmu_context_bmap[new_ctx>>6] |= (1UL << (new_ctx & 63)); | |
673 | new_ctx |= (tlb_context_cache & CTX_VERSION_MASK); | |
674 | out: | |
675 | tlb_context_cache = new_ctx; | |
676 | mm->context.sparc64_ctx_val = new_ctx | orig_pgsz_bits; | |
a77754b4 | 677 | spin_unlock_irqrestore(&ctx_alloc_lock, flags); |
a0663a79 DM |
678 | |
679 | if (unlikely(new_version)) | |
680 | smp_new_mmu_context_version(); | |
1da177e4 LT |
681 | } |
682 | ||
1da177e4 LT |
683 | void sparc_ultra_dump_itlb(void) |
684 | { | |
685 | int slot; | |
686 | ||
687 | if (tlb_type == spitfire) { | |
688 | printk ("Contents of itlb: "); | |
689 | for (slot = 0; slot < 14; slot++) printk (" "); | |
690 | printk ("%2x:%016lx,%016lx\n", | |
691 | 0, | |
692 | spitfire_get_itlb_tag(0), spitfire_get_itlb_data(0)); | |
693 | for (slot = 1; slot < 64; slot+=3) { | |
694 | printk ("%2x:%016lx,%016lx %2x:%016lx,%016lx %2x:%016lx,%016lx\n", | |
695 | slot, | |
696 | spitfire_get_itlb_tag(slot), spitfire_get_itlb_data(slot), | |
697 | slot+1, | |
698 | spitfire_get_itlb_tag(slot+1), spitfire_get_itlb_data(slot+1), | |
699 | slot+2, | |
700 | spitfire_get_itlb_tag(slot+2), spitfire_get_itlb_data(slot+2)); | |
701 | } | |
702 | } else if (tlb_type == cheetah || tlb_type == cheetah_plus) { | |
703 | printk ("Contents of itlb0:\n"); | |
704 | for (slot = 0; slot < 16; slot+=2) { | |
705 | printk ("%2x:%016lx,%016lx %2x:%016lx,%016lx\n", | |
706 | slot, | |
707 | cheetah_get_litlb_tag(slot), cheetah_get_litlb_data(slot), | |
708 | slot+1, | |
709 | cheetah_get_litlb_tag(slot+1), cheetah_get_litlb_data(slot+1)); | |
710 | } | |
711 | printk ("Contents of itlb2:\n"); | |
712 | for (slot = 0; slot < 128; slot+=2) { | |
713 | printk ("%2x:%016lx,%016lx %2x:%016lx,%016lx\n", | |
714 | slot, | |
715 | cheetah_get_itlb_tag(slot), cheetah_get_itlb_data(slot), | |
716 | slot+1, | |
717 | cheetah_get_itlb_tag(slot+1), cheetah_get_itlb_data(slot+1)); | |
718 | } | |
719 | } | |
720 | } | |
721 | ||
722 | void sparc_ultra_dump_dtlb(void) | |
723 | { | |
724 | int slot; | |
725 | ||
726 | if (tlb_type == spitfire) { | |
727 | printk ("Contents of dtlb: "); | |
728 | for (slot = 0; slot < 14; slot++) printk (" "); | |
729 | printk ("%2x:%016lx,%016lx\n", 0, | |
730 | spitfire_get_dtlb_tag(0), spitfire_get_dtlb_data(0)); | |
731 | for (slot = 1; slot < 64; slot+=3) { | |
732 | printk ("%2x:%016lx,%016lx %2x:%016lx,%016lx %2x:%016lx,%016lx\n", | |
733 | slot, | |
734 | spitfire_get_dtlb_tag(slot), spitfire_get_dtlb_data(slot), | |
735 | slot+1, | |
736 | spitfire_get_dtlb_tag(slot+1), spitfire_get_dtlb_data(slot+1), | |
737 | slot+2, | |
738 | spitfire_get_dtlb_tag(slot+2), spitfire_get_dtlb_data(slot+2)); | |
739 | } | |
740 | } else if (tlb_type == cheetah || tlb_type == cheetah_plus) { | |
741 | printk ("Contents of dtlb0:\n"); | |
742 | for (slot = 0; slot < 16; slot+=2) { | |
743 | printk ("%2x:%016lx,%016lx %2x:%016lx,%016lx\n", | |
744 | slot, | |
745 | cheetah_get_ldtlb_tag(slot), cheetah_get_ldtlb_data(slot), | |
746 | slot+1, | |
747 | cheetah_get_ldtlb_tag(slot+1), cheetah_get_ldtlb_data(slot+1)); | |
748 | } | |
749 | printk ("Contents of dtlb2:\n"); | |
750 | for (slot = 0; slot < 512; slot+=2) { | |
751 | printk ("%2x:%016lx,%016lx %2x:%016lx,%016lx\n", | |
752 | slot, | |
753 | cheetah_get_dtlb_tag(slot, 2), cheetah_get_dtlb_data(slot, 2), | |
754 | slot+1, | |
755 | cheetah_get_dtlb_tag(slot+1, 2), cheetah_get_dtlb_data(slot+1, 2)); | |
756 | } | |
757 | if (tlb_type == cheetah_plus) { | |
758 | printk ("Contents of dtlb3:\n"); | |
759 | for (slot = 0; slot < 512; slot+=2) { | |
760 | printk ("%2x:%016lx,%016lx %2x:%016lx,%016lx\n", | |
761 | slot, | |
762 | cheetah_get_dtlb_tag(slot, 3), cheetah_get_dtlb_data(slot, 3), | |
763 | slot+1, | |
764 | cheetah_get_dtlb_tag(slot+1, 3), cheetah_get_dtlb_data(slot+1, 3)); | |
765 | } | |
766 | } | |
767 | } | |
768 | } | |
769 | ||
770 | extern unsigned long cmdline_memory_size; | |
771 | ||
d1112018 DM |
772 | /* Find a free area for the bootmem map, avoiding the kernel image |
773 | * and the initial ramdisk. | |
774 | */ | |
775 | static unsigned long __init choose_bootmap_pfn(unsigned long start_pfn, | |
776 | unsigned long end_pfn) | |
1da177e4 | 777 | { |
d1112018 DM |
778 | unsigned long avoid_start, avoid_end, bootmap_size; |
779 | int i; | |
780 | ||
781 | bootmap_size = ((end_pfn - start_pfn) + 7) / 8; | |
782 | bootmap_size = ALIGN(bootmap_size, sizeof(long)); | |
783 | ||
784 | avoid_start = avoid_end = 0; | |
785 | #ifdef CONFIG_BLK_DEV_INITRD | |
786 | avoid_start = initrd_start; | |
787 | avoid_end = PAGE_ALIGN(initrd_end); | |
788 | #endif | |
789 | ||
790 | #ifdef CONFIG_DEBUG_BOOTMEM | |
791 | prom_printf("choose_bootmap_pfn: kern[%lx:%lx] avoid[%lx:%lx]\n", | |
792 | kern_base, PAGE_ALIGN(kern_base + kern_size), | |
793 | avoid_start, avoid_end); | |
794 | #endif | |
795 | for (i = 0; i < pavail_ents; i++) { | |
796 | unsigned long start, end; | |
797 | ||
798 | start = pavail[i].phys_addr; | |
799 | end = start + pavail[i].reg_size; | |
800 | ||
801 | while (start < end) { | |
802 | if (start >= kern_base && | |
803 | start < PAGE_ALIGN(kern_base + kern_size)) { | |
804 | start = PAGE_ALIGN(kern_base + kern_size); | |
805 | continue; | |
806 | } | |
807 | if (start >= avoid_start && start < avoid_end) { | |
808 | start = avoid_end; | |
809 | continue; | |
810 | } | |
811 | ||
812 | if ((end - start) < bootmap_size) | |
813 | break; | |
814 | ||
815 | if (start < kern_base && | |
816 | (start + bootmap_size) > kern_base) { | |
817 | start = PAGE_ALIGN(kern_base + kern_size); | |
818 | continue; | |
819 | } | |
820 | ||
821 | if (start < avoid_start && | |
822 | (start + bootmap_size) > avoid_start) { | |
823 | start = avoid_end; | |
824 | continue; | |
825 | } | |
826 | ||
827 | /* OK, it doesn't overlap anything, use it. */ | |
828 | #ifdef CONFIG_DEBUG_BOOTMEM | |
829 | prom_printf("choose_bootmap_pfn: Using %lx [%lx]\n", | |
830 | start >> PAGE_SHIFT, start); | |
831 | #endif | |
832 | return start >> PAGE_SHIFT; | |
833 | } | |
834 | } | |
835 | ||
836 | prom_printf("Cannot find free area for bootmap, aborting.\n"); | |
837 | prom_halt(); | |
838 | } | |
839 | ||
840 | static unsigned long __init bootmem_init(unsigned long *pages_avail, | |
841 | unsigned long phys_base) | |
842 | { | |
843 | unsigned long bootmap_size, end_pfn; | |
1da177e4 LT |
844 | unsigned long end_of_phys_memory = 0UL; |
845 | unsigned long bootmap_pfn, bytes_avail, size; | |
846 | int i; | |
847 | ||
848 | #ifdef CONFIG_DEBUG_BOOTMEM | |
13edad7a | 849 | prom_printf("bootmem_init: Scan pavail, "); |
1da177e4 LT |
850 | #endif |
851 | ||
852 | bytes_avail = 0UL; | |
13edad7a DM |
853 | for (i = 0; i < pavail_ents; i++) { |
854 | end_of_phys_memory = pavail[i].phys_addr + | |
855 | pavail[i].reg_size; | |
856 | bytes_avail += pavail[i].reg_size; | |
1da177e4 LT |
857 | if (cmdline_memory_size) { |
858 | if (bytes_avail > cmdline_memory_size) { | |
859 | unsigned long slack = bytes_avail - cmdline_memory_size; | |
860 | ||
861 | bytes_avail -= slack; | |
862 | end_of_phys_memory -= slack; | |
863 | ||
13edad7a DM |
864 | pavail[i].reg_size -= slack; |
865 | if ((long)pavail[i].reg_size <= 0L) { | |
866 | pavail[i].phys_addr = 0xdeadbeefUL; | |
867 | pavail[i].reg_size = 0UL; | |
868 | pavail_ents = i; | |
1da177e4 | 869 | } else { |
13edad7a DM |
870 | pavail[i+1].reg_size = 0Ul; |
871 | pavail[i+1].phys_addr = 0xdeadbeefUL; | |
872 | pavail_ents = i + 1; | |
1da177e4 LT |
873 | } |
874 | break; | |
875 | } | |
876 | } | |
877 | } | |
878 | ||
879 | *pages_avail = bytes_avail >> PAGE_SHIFT; | |
880 | ||
1da177e4 LT |
881 | end_pfn = end_of_phys_memory >> PAGE_SHIFT; |
882 | ||
883 | #ifdef CONFIG_BLK_DEV_INITRD | |
884 | /* Now have to check initial ramdisk, so that bootmap does not overwrite it */ | |
885 | if (sparc_ramdisk_image || sparc_ramdisk_image64) { | |
886 | unsigned long ramdisk_image = sparc_ramdisk_image ? | |
887 | sparc_ramdisk_image : sparc_ramdisk_image64; | |
888 | if (ramdisk_image >= (unsigned long)_end - 2 * PAGE_SIZE) | |
889 | ramdisk_image -= KERNBASE; | |
890 | initrd_start = ramdisk_image + phys_base; | |
891 | initrd_end = initrd_start + sparc_ramdisk_size; | |
892 | if (initrd_end > end_of_phys_memory) { | |
893 | printk(KERN_CRIT "initrd extends beyond end of memory " | |
894 | "(0x%016lx > 0x%016lx)\ndisabling initrd\n", | |
895 | initrd_end, end_of_phys_memory); | |
896 | initrd_start = 0; | |
d1112018 | 897 | initrd_end = 0; |
1da177e4 LT |
898 | } |
899 | } | |
900 | #endif | |
901 | /* Initialize the boot-time allocator. */ | |
902 | max_pfn = max_low_pfn = end_pfn; | |
d1112018 DM |
903 | min_low_pfn = (phys_base >> PAGE_SHIFT); |
904 | ||
905 | bootmap_pfn = choose_bootmap_pfn(min_low_pfn, end_pfn); | |
1da177e4 LT |
906 | |
907 | #ifdef CONFIG_DEBUG_BOOTMEM | |
908 | prom_printf("init_bootmem(min[%lx], bootmap[%lx], max[%lx])\n", | |
909 | min_low_pfn, bootmap_pfn, max_low_pfn); | |
910 | #endif | |
d1112018 | 911 | bootmap_size = init_bootmem_node(NODE_DATA(0), bootmap_pfn, |
17b0e199 | 912 | min_low_pfn, end_pfn); |
1da177e4 | 913 | |
1da177e4 LT |
914 | /* Now register the available physical memory with the |
915 | * allocator. | |
916 | */ | |
13edad7a | 917 | for (i = 0; i < pavail_ents; i++) { |
1da177e4 | 918 | #ifdef CONFIG_DEBUG_BOOTMEM |
13edad7a DM |
919 | prom_printf("free_bootmem(pavail:%d): base[%lx] size[%lx]\n", |
920 | i, pavail[i].phys_addr, pavail[i].reg_size); | |
1da177e4 | 921 | #endif |
13edad7a | 922 | free_bootmem(pavail[i].phys_addr, pavail[i].reg_size); |
1da177e4 LT |
923 | } |
924 | ||
925 | #ifdef CONFIG_BLK_DEV_INITRD | |
926 | if (initrd_start) { | |
927 | size = initrd_end - initrd_start; | |
928 | ||
929 | /* Resert the initrd image area. */ | |
930 | #ifdef CONFIG_DEBUG_BOOTMEM | |
931 | prom_printf("reserve_bootmem(initrd): base[%llx] size[%lx]\n", | |
932 | initrd_start, initrd_end); | |
933 | #endif | |
934 | reserve_bootmem(initrd_start, size); | |
935 | *pages_avail -= PAGE_ALIGN(size) >> PAGE_SHIFT; | |
936 | ||
937 | initrd_start += PAGE_OFFSET; | |
938 | initrd_end += PAGE_OFFSET; | |
939 | } | |
940 | #endif | |
941 | /* Reserve the kernel text/data/bss. */ | |
942 | #ifdef CONFIG_DEBUG_BOOTMEM | |
943 | prom_printf("reserve_bootmem(kernel): base[%lx] size[%lx]\n", kern_base, kern_size); | |
944 | #endif | |
945 | reserve_bootmem(kern_base, kern_size); | |
946 | *pages_avail -= PAGE_ALIGN(kern_size) >> PAGE_SHIFT; | |
947 | ||
948 | /* Reserve the bootmem map. We do not account for it | |
949 | * in pages_avail because we will release that memory | |
950 | * in free_all_bootmem. | |
951 | */ | |
952 | size = bootmap_size; | |
953 | #ifdef CONFIG_DEBUG_BOOTMEM | |
954 | prom_printf("reserve_bootmem(bootmap): base[%lx] size[%lx]\n", | |
955 | (bootmap_pfn << PAGE_SHIFT), size); | |
956 | #endif | |
957 | reserve_bootmem((bootmap_pfn << PAGE_SHIFT), size); | |
958 | *pages_avail -= PAGE_ALIGN(size) >> PAGE_SHIFT; | |
959 | ||
d1112018 DM |
960 | for (i = 0; i < pavail_ents; i++) { |
961 | unsigned long start_pfn, end_pfn; | |
962 | ||
963 | start_pfn = pavail[i].phys_addr >> PAGE_SHIFT; | |
964 | end_pfn = (start_pfn + (pavail[i].reg_size >> PAGE_SHIFT)); | |
965 | #ifdef CONFIG_DEBUG_BOOTMEM | |
966 | prom_printf("memory_present(0, %lx, %lx)\n", | |
967 | start_pfn, end_pfn); | |
968 | #endif | |
969 | memory_present(0, start_pfn, end_pfn); | |
970 | } | |
971 | ||
972 | sparse_init(); | |
973 | ||
1da177e4 LT |
974 | return end_pfn; |
975 | } | |
976 | ||
9cc3a1ac DM |
977 | static struct linux_prom64_registers pall[MAX_BANKS] __initdata; |
978 | static int pall_ents __initdata; | |
979 | ||
56425306 DM |
980 | #ifdef CONFIG_DEBUG_PAGEALLOC |
981 | static unsigned long kernel_map_range(unsigned long pstart, unsigned long pend, pgprot_t prot) | |
982 | { | |
983 | unsigned long vstart = PAGE_OFFSET + pstart; | |
984 | unsigned long vend = PAGE_OFFSET + pend; | |
985 | unsigned long alloc_bytes = 0UL; | |
986 | ||
987 | if ((vstart & ~PAGE_MASK) || (vend & ~PAGE_MASK)) { | |
13edad7a | 988 | prom_printf("kernel_map: Unaligned physmem[%lx:%lx]\n", |
56425306 DM |
989 | vstart, vend); |
990 | prom_halt(); | |
991 | } | |
992 | ||
993 | while (vstart < vend) { | |
994 | unsigned long this_end, paddr = __pa(vstart); | |
995 | pgd_t *pgd = pgd_offset_k(vstart); | |
996 | pud_t *pud; | |
997 | pmd_t *pmd; | |
998 | pte_t *pte; | |
999 | ||
1000 | pud = pud_offset(pgd, vstart); | |
1001 | if (pud_none(*pud)) { | |
1002 | pmd_t *new; | |
1003 | ||
1004 | new = __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, PAGE_SIZE); | |
1005 | alloc_bytes += PAGE_SIZE; | |
1006 | pud_populate(&init_mm, pud, new); | |
1007 | } | |
1008 | ||
1009 | pmd = pmd_offset(pud, vstart); | |
1010 | if (!pmd_present(*pmd)) { | |
1011 | pte_t *new; | |
1012 | ||
1013 | new = __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, PAGE_SIZE); | |
1014 | alloc_bytes += PAGE_SIZE; | |
1015 | pmd_populate_kernel(&init_mm, pmd, new); | |
1016 | } | |
1017 | ||
1018 | pte = pte_offset_kernel(pmd, vstart); | |
1019 | this_end = (vstart + PMD_SIZE) & PMD_MASK; | |
1020 | if (this_end > vend) | |
1021 | this_end = vend; | |
1022 | ||
1023 | while (vstart < this_end) { | |
1024 | pte_val(*pte) = (paddr | pgprot_val(prot)); | |
1025 | ||
1026 | vstart += PAGE_SIZE; | |
1027 | paddr += PAGE_SIZE; | |
1028 | pte++; | |
1029 | } | |
1030 | } | |
1031 | ||
1032 | return alloc_bytes; | |
1033 | } | |
1034 | ||
56425306 | 1035 | extern unsigned int kvmap_linear_patch[1]; |
9cc3a1ac DM |
1036 | #endif /* CONFIG_DEBUG_PAGEALLOC */ |
1037 | ||
1038 | static void __init mark_kpte_bitmap(unsigned long start, unsigned long end) | |
1039 | { | |
1040 | const unsigned long shift_256MB = 28; | |
1041 | const unsigned long mask_256MB = ((1UL << shift_256MB) - 1UL); | |
1042 | const unsigned long size_256MB = (1UL << shift_256MB); | |
1043 | ||
1044 | while (start < end) { | |
1045 | long remains; | |
1046 | ||
f7c00338 DM |
1047 | remains = end - start; |
1048 | if (remains < size_256MB) | |
1049 | break; | |
1050 | ||
9cc3a1ac DM |
1051 | if (start & mask_256MB) { |
1052 | start = (start + size_256MB) & ~mask_256MB; | |
1053 | continue; | |
1054 | } | |
1055 | ||
9cc3a1ac DM |
1056 | while (remains >= size_256MB) { |
1057 | unsigned long index = start >> shift_256MB; | |
1058 | ||
1059 | __set_bit(index, kpte_linear_bitmap); | |
1060 | ||
1061 | start += size_256MB; | |
1062 | remains -= size_256MB; | |
1063 | } | |
1064 | } | |
1065 | } | |
56425306 DM |
1066 | |
1067 | static void __init kernel_physical_mapping_init(void) | |
1068 | { | |
9cc3a1ac DM |
1069 | unsigned long i; |
1070 | #ifdef CONFIG_DEBUG_PAGEALLOC | |
1071 | unsigned long mem_alloced = 0UL; | |
1072 | #endif | |
56425306 | 1073 | |
13edad7a DM |
1074 | read_obp_memory("reg", &pall[0], &pall_ents); |
1075 | ||
1076 | for (i = 0; i < pall_ents; i++) { | |
56425306 DM |
1077 | unsigned long phys_start, phys_end; |
1078 | ||
13edad7a DM |
1079 | phys_start = pall[i].phys_addr; |
1080 | phys_end = phys_start + pall[i].reg_size; | |
9cc3a1ac DM |
1081 | |
1082 | mark_kpte_bitmap(phys_start, phys_end); | |
1083 | ||
1084 | #ifdef CONFIG_DEBUG_PAGEALLOC | |
56425306 DM |
1085 | mem_alloced += kernel_map_range(phys_start, phys_end, |
1086 | PAGE_KERNEL); | |
9cc3a1ac | 1087 | #endif |
56425306 DM |
1088 | } |
1089 | ||
9cc3a1ac | 1090 | #ifdef CONFIG_DEBUG_PAGEALLOC |
56425306 DM |
1091 | printk("Allocated %ld bytes for kernel page tables.\n", |
1092 | mem_alloced); | |
1093 | ||
1094 | kvmap_linear_patch[0] = 0x01000000; /* nop */ | |
1095 | flushi(&kvmap_linear_patch[0]); | |
1096 | ||
1097 | __flush_tlb_all(); | |
9cc3a1ac | 1098 | #endif |
56425306 DM |
1099 | } |
1100 | ||
9cc3a1ac | 1101 | #ifdef CONFIG_DEBUG_PAGEALLOC |
56425306 DM |
1102 | void kernel_map_pages(struct page *page, int numpages, int enable) |
1103 | { | |
1104 | unsigned long phys_start = page_to_pfn(page) << PAGE_SHIFT; | |
1105 | unsigned long phys_end = phys_start + (numpages * PAGE_SIZE); | |
1106 | ||
1107 | kernel_map_range(phys_start, phys_end, | |
1108 | (enable ? PAGE_KERNEL : __pgprot(0))); | |
1109 | ||
74bf4312 DM |
1110 | flush_tsb_kernel_range(PAGE_OFFSET + phys_start, |
1111 | PAGE_OFFSET + phys_end); | |
1112 | ||
56425306 DM |
1113 | /* we should perform an IPI and flush all tlbs, |
1114 | * but that can deadlock->flush only current cpu. | |
1115 | */ | |
1116 | __flush_tlb_kernel_range(PAGE_OFFSET + phys_start, | |
1117 | PAGE_OFFSET + phys_end); | |
1118 | } | |
1119 | #endif | |
1120 | ||
10147570 DM |
1121 | unsigned long __init find_ecache_flush_span(unsigned long size) |
1122 | { | |
0836a0eb DM |
1123 | int i; |
1124 | ||
13edad7a DM |
1125 | for (i = 0; i < pavail_ents; i++) { |
1126 | if (pavail[i].reg_size >= size) | |
1127 | return pavail[i].phys_addr; | |
0836a0eb DM |
1128 | } |
1129 | ||
13edad7a | 1130 | return ~0UL; |
0836a0eb DM |
1131 | } |
1132 | ||
517af332 DM |
1133 | static void __init tsb_phys_patch(void) |
1134 | { | |
d257d5da | 1135 | struct tsb_ldquad_phys_patch_entry *pquad; |
517af332 DM |
1136 | struct tsb_phys_patch_entry *p; |
1137 | ||
d257d5da DM |
1138 | pquad = &__tsb_ldquad_phys_patch; |
1139 | while (pquad < &__tsb_ldquad_phys_patch_end) { | |
1140 | unsigned long addr = pquad->addr; | |
1141 | ||
1142 | if (tlb_type == hypervisor) | |
1143 | *(unsigned int *) addr = pquad->sun4v_insn; | |
1144 | else | |
1145 | *(unsigned int *) addr = pquad->sun4u_insn; | |
1146 | wmb(); | |
1147 | __asm__ __volatile__("flush %0" | |
1148 | : /* no outputs */ | |
1149 | : "r" (addr)); | |
1150 | ||
1151 | pquad++; | |
1152 | } | |
1153 | ||
517af332 DM |
1154 | p = &__tsb_phys_patch; |
1155 | while (p < &__tsb_phys_patch_end) { | |
1156 | unsigned long addr = p->addr; | |
1157 | ||
1158 | *(unsigned int *) addr = p->insn; | |
1159 | wmb(); | |
1160 | __asm__ __volatile__("flush %0" | |
1161 | : /* no outputs */ | |
1162 | : "r" (addr)); | |
1163 | ||
1164 | p++; | |
1165 | } | |
1166 | } | |
1167 | ||
490384e7 DM |
1168 | /* Don't mark as init, we give this to the Hypervisor. */ |
1169 | static struct hv_tsb_descr ktsb_descr[2]; | |
1170 | extern struct tsb swapper_tsb[KERNEL_TSB_NENTRIES]; | |
1171 | ||
1172 | static void __init sun4v_ktsb_init(void) | |
1173 | { | |
1174 | unsigned long ktsb_pa; | |
1175 | ||
d7744a09 | 1176 | /* First KTSB for PAGE_SIZE mappings. */ |
490384e7 DM |
1177 | ktsb_pa = kern_base + ((unsigned long)&swapper_tsb[0] - KERNBASE); |
1178 | ||
1179 | switch (PAGE_SIZE) { | |
1180 | case 8 * 1024: | |
1181 | default: | |
1182 | ktsb_descr[0].pgsz_idx = HV_PGSZ_IDX_8K; | |
1183 | ktsb_descr[0].pgsz_mask = HV_PGSZ_MASK_8K; | |
1184 | break; | |
1185 | ||
1186 | case 64 * 1024: | |
1187 | ktsb_descr[0].pgsz_idx = HV_PGSZ_IDX_64K; | |
1188 | ktsb_descr[0].pgsz_mask = HV_PGSZ_MASK_64K; | |
1189 | break; | |
1190 | ||
1191 | case 512 * 1024: | |
1192 | ktsb_descr[0].pgsz_idx = HV_PGSZ_IDX_512K; | |
1193 | ktsb_descr[0].pgsz_mask = HV_PGSZ_MASK_512K; | |
1194 | break; | |
1195 | ||
1196 | case 4 * 1024 * 1024: | |
1197 | ktsb_descr[0].pgsz_idx = HV_PGSZ_IDX_4MB; | |
1198 | ktsb_descr[0].pgsz_mask = HV_PGSZ_MASK_4MB; | |
1199 | break; | |
1200 | }; | |
1201 | ||
3f19a84e | 1202 | ktsb_descr[0].assoc = 1; |
490384e7 DM |
1203 | ktsb_descr[0].num_ttes = KERNEL_TSB_NENTRIES; |
1204 | ktsb_descr[0].ctx_idx = 0; | |
1205 | ktsb_descr[0].tsb_base = ktsb_pa; | |
1206 | ktsb_descr[0].resv = 0; | |
1207 | ||
d7744a09 DM |
1208 | /* Second KTSB for 4MB/256MB mappings. */ |
1209 | ktsb_pa = (kern_base + | |
1210 | ((unsigned long)&swapper_4m_tsb[0] - KERNBASE)); | |
1211 | ||
1212 | ktsb_descr[1].pgsz_idx = HV_PGSZ_IDX_4MB; | |
1213 | ktsb_descr[1].pgsz_mask = (HV_PGSZ_MASK_4MB | | |
1214 | HV_PGSZ_MASK_256MB); | |
1215 | ktsb_descr[1].assoc = 1; | |
1216 | ktsb_descr[1].num_ttes = KERNEL_TSB4M_NENTRIES; | |
1217 | ktsb_descr[1].ctx_idx = 0; | |
1218 | ktsb_descr[1].tsb_base = ktsb_pa; | |
1219 | ktsb_descr[1].resv = 0; | |
490384e7 DM |
1220 | } |
1221 | ||
1222 | void __cpuinit sun4v_ktsb_register(void) | |
1223 | { | |
1224 | register unsigned long func asm("%o5"); | |
1225 | register unsigned long arg0 asm("%o0"); | |
1226 | register unsigned long arg1 asm("%o1"); | |
1227 | unsigned long pa; | |
1228 | ||
1229 | pa = kern_base + ((unsigned long)&ktsb_descr[0] - KERNBASE); | |
1230 | ||
1231 | func = HV_FAST_MMU_TSB_CTX0; | |
d7744a09 | 1232 | arg0 = 2; |
490384e7 DM |
1233 | arg1 = pa; |
1234 | __asm__ __volatile__("ta %6" | |
1235 | : "=&r" (func), "=&r" (arg0), "=&r" (arg1) | |
1236 | : "0" (func), "1" (arg0), "2" (arg1), | |
1237 | "i" (HV_FAST_TRAP)); | |
1238 | } | |
1239 | ||
1da177e4 LT |
1240 | /* paging_init() sets up the page tables */ |
1241 | ||
1242 | extern void cheetah_ecache_flush_init(void); | |
d257d5da | 1243 | extern void sun4v_patch_tlb_handlers(void); |
1da177e4 LT |
1244 | |
1245 | static unsigned long last_valid_pfn; | |
56425306 | 1246 | pgd_t swapper_pg_dir[2048]; |
1da177e4 | 1247 | |
c4bce90e DM |
1248 | static void sun4u_pgprot_init(void); |
1249 | static void sun4v_pgprot_init(void); | |
1250 | ||
1da177e4 LT |
1251 | void __init paging_init(void) |
1252 | { | |
d1112018 | 1253 | unsigned long end_pfn, pages_avail, shift, phys_base; |
0836a0eb DM |
1254 | unsigned long real_end, i; |
1255 | ||
481295f9 DM |
1256 | kern_base = (prom_boot_mapping_phys_low >> 22UL) << 22UL; |
1257 | kern_size = (unsigned long)&_end - (unsigned long)KERNBASE; | |
1258 | ||
d7744a09 | 1259 | /* Invalidate both kernel TSBs. */ |
8b234274 | 1260 | memset(swapper_tsb, 0x40, sizeof(swapper_tsb)); |
d7744a09 | 1261 | memset(swapper_4m_tsb, 0x40, sizeof(swapper_4m_tsb)); |
8b234274 | 1262 | |
c4bce90e DM |
1263 | if (tlb_type == hypervisor) |
1264 | sun4v_pgprot_init(); | |
1265 | else | |
1266 | sun4u_pgprot_init(); | |
1267 | ||
d257d5da DM |
1268 | if (tlb_type == cheetah_plus || |
1269 | tlb_type == hypervisor) | |
517af332 DM |
1270 | tsb_phys_patch(); |
1271 | ||
490384e7 | 1272 | if (tlb_type == hypervisor) { |
d257d5da | 1273 | sun4v_patch_tlb_handlers(); |
490384e7 DM |
1274 | sun4v_ktsb_init(); |
1275 | } | |
d257d5da | 1276 | |
13edad7a DM |
1277 | /* Find available physical memory... */ |
1278 | read_obp_memory("available", &pavail[0], &pavail_ents); | |
0836a0eb DM |
1279 | |
1280 | phys_base = 0xffffffffffffffffUL; | |
13edad7a DM |
1281 | for (i = 0; i < pavail_ents; i++) |
1282 | phys_base = min(phys_base, pavail[i].phys_addr); | |
0836a0eb | 1283 | |
1da177e4 LT |
1284 | set_bit(0, mmu_context_bmap); |
1285 | ||
2bdb3cb2 DM |
1286 | shift = kern_base + PAGE_OFFSET - ((unsigned long)KERNBASE); |
1287 | ||
1da177e4 LT |
1288 | real_end = (unsigned long)_end; |
1289 | if ((real_end > ((unsigned long)KERNBASE + 0x400000))) | |
1290 | bigkernel = 1; | |
2bdb3cb2 DM |
1291 | if ((real_end > ((unsigned long)KERNBASE + 0x800000))) { |
1292 | prom_printf("paging_init: Kernel > 8MB, too large.\n"); | |
1293 | prom_halt(); | |
1da177e4 | 1294 | } |
2bdb3cb2 DM |
1295 | |
1296 | /* Set kernel pgd to upper alias so physical page computations | |
1da177e4 LT |
1297 | * work. |
1298 | */ | |
1299 | init_mm.pgd += ((shift) / (sizeof(pgd_t))); | |
1300 | ||
56425306 | 1301 | memset(swapper_low_pmd_dir, 0, sizeof(swapper_low_pmd_dir)); |
1da177e4 LT |
1302 | |
1303 | /* Now can init the kernel/bad page tables. */ | |
1304 | pud_set(pud_offset(&swapper_pg_dir[0], 0), | |
56425306 | 1305 | swapper_low_pmd_dir + (shift / sizeof(pgd_t))); |
1da177e4 | 1306 | |
c9c10830 | 1307 | inherit_prom_mappings(); |
5085b4a5 | 1308 | |
a8b900d8 DM |
1309 | /* Ok, we can use our TLB miss and window trap handlers safely. */ |
1310 | setup_tba(); | |
1da177e4 | 1311 | |
c9c10830 | 1312 | __flush_tlb_all(); |
9ad98c5b | 1313 | |
490384e7 DM |
1314 | if (tlb_type == hypervisor) |
1315 | sun4v_ktsb_register(); | |
1316 | ||
2bdb3cb2 DM |
1317 | /* Setup bootmem... */ |
1318 | pages_avail = 0; | |
d1112018 DM |
1319 | last_valid_pfn = end_pfn = bootmem_init(&pages_avail, phys_base); |
1320 | ||
17b0e199 | 1321 | max_mapnr = last_valid_pfn; |
2bdb3cb2 | 1322 | |
56425306 | 1323 | kernel_physical_mapping_init(); |
56425306 | 1324 | |
1da177e4 LT |
1325 | { |
1326 | unsigned long zones_size[MAX_NR_ZONES]; | |
1327 | unsigned long zholes_size[MAX_NR_ZONES]; | |
1da177e4 LT |
1328 | int znum; |
1329 | ||
1330 | for (znum = 0; znum < MAX_NR_ZONES; znum++) | |
1331 | zones_size[znum] = zholes_size[znum] = 0; | |
1332 | ||
17b0e199 DM |
1333 | zones_size[ZONE_DMA] = end_pfn; |
1334 | zholes_size[ZONE_DMA] = end_pfn - pages_avail; | |
1da177e4 LT |
1335 | |
1336 | free_area_init_node(0, &contig_page_data, zones_size, | |
17b0e199 DM |
1337 | __pa(PAGE_OFFSET) >> PAGE_SHIFT, |
1338 | zholes_size); | |
1da177e4 LT |
1339 | } |
1340 | ||
1341 | device_scan(); | |
1342 | } | |
1343 | ||
1da177e4 LT |
1344 | static void __init taint_real_pages(void) |
1345 | { | |
1da177e4 LT |
1346 | int i; |
1347 | ||
13edad7a | 1348 | read_obp_memory("available", &pavail_rescan[0], &pavail_rescan_ents); |
1da177e4 | 1349 | |
13edad7a | 1350 | /* Find changes discovered in the physmem available rescan and |
1da177e4 LT |
1351 | * reserve the lost portions in the bootmem maps. |
1352 | */ | |
13edad7a | 1353 | for (i = 0; i < pavail_ents; i++) { |
1da177e4 LT |
1354 | unsigned long old_start, old_end; |
1355 | ||
13edad7a | 1356 | old_start = pavail[i].phys_addr; |
1da177e4 | 1357 | old_end = old_start + |
13edad7a | 1358 | pavail[i].reg_size; |
1da177e4 LT |
1359 | while (old_start < old_end) { |
1360 | int n; | |
1361 | ||
13edad7a | 1362 | for (n = 0; pavail_rescan_ents; n++) { |
1da177e4 LT |
1363 | unsigned long new_start, new_end; |
1364 | ||
13edad7a DM |
1365 | new_start = pavail_rescan[n].phys_addr; |
1366 | new_end = new_start + | |
1367 | pavail_rescan[n].reg_size; | |
1da177e4 LT |
1368 | |
1369 | if (new_start <= old_start && | |
1370 | new_end >= (old_start + PAGE_SIZE)) { | |
13edad7a DM |
1371 | set_bit(old_start >> 22, |
1372 | sparc64_valid_addr_bitmap); | |
1da177e4 LT |
1373 | goto do_next_page; |
1374 | } | |
1375 | } | |
1376 | reserve_bootmem(old_start, PAGE_SIZE); | |
1377 | ||
1378 | do_next_page: | |
1379 | old_start += PAGE_SIZE; | |
1380 | } | |
1381 | } | |
1382 | } | |
1383 | ||
1384 | void __init mem_init(void) | |
1385 | { | |
1386 | unsigned long codepages, datapages, initpages; | |
1387 | unsigned long addr, last; | |
1388 | int i; | |
1389 | ||
1390 | i = last_valid_pfn >> ((22 - PAGE_SHIFT) + 6); | |
1391 | i += 1; | |
2bdb3cb2 | 1392 | sparc64_valid_addr_bitmap = (unsigned long *) alloc_bootmem(i << 3); |
1da177e4 LT |
1393 | if (sparc64_valid_addr_bitmap == NULL) { |
1394 | prom_printf("mem_init: Cannot alloc valid_addr_bitmap.\n"); | |
1395 | prom_halt(); | |
1396 | } | |
1397 | memset(sparc64_valid_addr_bitmap, 0, i << 3); | |
1398 | ||
1399 | addr = PAGE_OFFSET + kern_base; | |
1400 | last = PAGE_ALIGN(kern_size) + addr; | |
1401 | while (addr < last) { | |
1402 | set_bit(__pa(addr) >> 22, sparc64_valid_addr_bitmap); | |
1403 | addr += PAGE_SIZE; | |
1404 | } | |
1405 | ||
1406 | taint_real_pages(); | |
1407 | ||
1da177e4 LT |
1408 | high_memory = __va(last_valid_pfn << PAGE_SHIFT); |
1409 | ||
1410 | #ifdef CONFIG_DEBUG_BOOTMEM | |
1411 | prom_printf("mem_init: Calling free_all_bootmem().\n"); | |
1412 | #endif | |
1413 | totalram_pages = num_physpages = free_all_bootmem() - 1; | |
1414 | ||
1415 | /* | |
1416 | * Set up the zero page, mark it reserved, so that page count | |
1417 | * is not manipulated when freeing the page from user ptes. | |
1418 | */ | |
1419 | mem_map_zero = alloc_pages(GFP_KERNEL|__GFP_ZERO, 0); | |
1420 | if (mem_map_zero == NULL) { | |
1421 | prom_printf("paging_init: Cannot alloc zero page.\n"); | |
1422 | prom_halt(); | |
1423 | } | |
1424 | SetPageReserved(mem_map_zero); | |
1425 | ||
1426 | codepages = (((unsigned long) _etext) - ((unsigned long) _start)); | |
1427 | codepages = PAGE_ALIGN(codepages) >> PAGE_SHIFT; | |
1428 | datapages = (((unsigned long) _edata) - ((unsigned long) _etext)); | |
1429 | datapages = PAGE_ALIGN(datapages) >> PAGE_SHIFT; | |
1430 | initpages = (((unsigned long) __init_end) - ((unsigned long) __init_begin)); | |
1431 | initpages = PAGE_ALIGN(initpages) >> PAGE_SHIFT; | |
1432 | ||
1433 | printk("Memory: %uk available (%ldk kernel code, %ldk data, %ldk init) [%016lx,%016lx]\n", | |
1434 | nr_free_pages() << (PAGE_SHIFT-10), | |
1435 | codepages << (PAGE_SHIFT-10), | |
1436 | datapages << (PAGE_SHIFT-10), | |
1437 | initpages << (PAGE_SHIFT-10), | |
1438 | PAGE_OFFSET, (last_valid_pfn << PAGE_SHIFT)); | |
1439 | ||
1440 | if (tlb_type == cheetah || tlb_type == cheetah_plus) | |
1441 | cheetah_ecache_flush_init(); | |
1442 | } | |
1443 | ||
898cf0ec | 1444 | void free_initmem(void) |
1da177e4 LT |
1445 | { |
1446 | unsigned long addr, initend; | |
1447 | ||
1448 | /* | |
1449 | * The init section is aligned to 8k in vmlinux.lds. Page align for >8k pagesizes. | |
1450 | */ | |
1451 | addr = PAGE_ALIGN((unsigned long)(__init_begin)); | |
1452 | initend = (unsigned long)(__init_end) & PAGE_MASK; | |
1453 | for (; addr < initend; addr += PAGE_SIZE) { | |
1454 | unsigned long page; | |
1455 | struct page *p; | |
1456 | ||
1457 | page = (addr + | |
1458 | ((unsigned long) __va(kern_base)) - | |
1459 | ((unsigned long) KERNBASE)); | |
1460 | memset((void *)addr, 0xcc, PAGE_SIZE); | |
1461 | p = virt_to_page(page); | |
1462 | ||
1463 | ClearPageReserved(p); | |
7835e98b | 1464 | init_page_count(p); |
1da177e4 LT |
1465 | __free_page(p); |
1466 | num_physpages++; | |
1467 | totalram_pages++; | |
1468 | } | |
1469 | } | |
1470 | ||
1471 | #ifdef CONFIG_BLK_DEV_INITRD | |
1472 | void free_initrd_mem(unsigned long start, unsigned long end) | |
1473 | { | |
1474 | if (start < end) | |
1475 | printk ("Freeing initrd memory: %ldk freed\n", (end - start) >> 10); | |
1476 | for (; start < end; start += PAGE_SIZE) { | |
1477 | struct page *p = virt_to_page(start); | |
1478 | ||
1479 | ClearPageReserved(p); | |
7835e98b | 1480 | init_page_count(p); |
1da177e4 LT |
1481 | __free_page(p); |
1482 | num_physpages++; | |
1483 | totalram_pages++; | |
1484 | } | |
1485 | } | |
1486 | #endif | |
c4bce90e | 1487 | |
c4bce90e DM |
1488 | #define _PAGE_CACHE_4U (_PAGE_CP_4U | _PAGE_CV_4U) |
1489 | #define _PAGE_CACHE_4V (_PAGE_CP_4V | _PAGE_CV_4V) | |
1490 | #define __DIRTY_BITS_4U (_PAGE_MODIFIED_4U | _PAGE_WRITE_4U | _PAGE_W_4U) | |
1491 | #define __DIRTY_BITS_4V (_PAGE_MODIFIED_4V | _PAGE_WRITE_4V | _PAGE_W_4V) | |
1492 | #define __ACCESS_BITS_4U (_PAGE_ACCESSED_4U | _PAGE_READ_4U | _PAGE_R) | |
1493 | #define __ACCESS_BITS_4V (_PAGE_ACCESSED_4V | _PAGE_READ_4V | _PAGE_R) | |
1494 | ||
1495 | pgprot_t PAGE_KERNEL __read_mostly; | |
1496 | EXPORT_SYMBOL(PAGE_KERNEL); | |
1497 | ||
1498 | pgprot_t PAGE_KERNEL_LOCKED __read_mostly; | |
1499 | pgprot_t PAGE_COPY __read_mostly; | |
0f15952a DM |
1500 | |
1501 | pgprot_t PAGE_SHARED __read_mostly; | |
1502 | EXPORT_SYMBOL(PAGE_SHARED); | |
1503 | ||
c4bce90e DM |
1504 | pgprot_t PAGE_EXEC __read_mostly; |
1505 | unsigned long pg_iobits __read_mostly; | |
1506 | ||
1507 | unsigned long _PAGE_IE __read_mostly; | |
b2bef442 | 1508 | |
c4bce90e | 1509 | unsigned long _PAGE_E __read_mostly; |
b2bef442 DM |
1510 | EXPORT_SYMBOL(_PAGE_E); |
1511 | ||
c4bce90e | 1512 | unsigned long _PAGE_CACHE __read_mostly; |
b2bef442 | 1513 | EXPORT_SYMBOL(_PAGE_CACHE); |
c4bce90e DM |
1514 | |
1515 | static void prot_init_common(unsigned long page_none, | |
1516 | unsigned long page_shared, | |
1517 | unsigned long page_copy, | |
1518 | unsigned long page_readonly, | |
1519 | unsigned long page_exec_bit) | |
1520 | { | |
1521 | PAGE_COPY = __pgprot(page_copy); | |
0f15952a | 1522 | PAGE_SHARED = __pgprot(page_shared); |
c4bce90e DM |
1523 | |
1524 | protection_map[0x0] = __pgprot(page_none); | |
1525 | protection_map[0x1] = __pgprot(page_readonly & ~page_exec_bit); | |
1526 | protection_map[0x2] = __pgprot(page_copy & ~page_exec_bit); | |
1527 | protection_map[0x3] = __pgprot(page_copy & ~page_exec_bit); | |
1528 | protection_map[0x4] = __pgprot(page_readonly); | |
1529 | protection_map[0x5] = __pgprot(page_readonly); | |
1530 | protection_map[0x6] = __pgprot(page_copy); | |
1531 | protection_map[0x7] = __pgprot(page_copy); | |
1532 | protection_map[0x8] = __pgprot(page_none); | |
1533 | protection_map[0x9] = __pgprot(page_readonly & ~page_exec_bit); | |
1534 | protection_map[0xa] = __pgprot(page_shared & ~page_exec_bit); | |
1535 | protection_map[0xb] = __pgprot(page_shared & ~page_exec_bit); | |
1536 | protection_map[0xc] = __pgprot(page_readonly); | |
1537 | protection_map[0xd] = __pgprot(page_readonly); | |
1538 | protection_map[0xe] = __pgprot(page_shared); | |
1539 | protection_map[0xf] = __pgprot(page_shared); | |
1540 | } | |
1541 | ||
1542 | static void __init sun4u_pgprot_init(void) | |
1543 | { | |
1544 | unsigned long page_none, page_shared, page_copy, page_readonly; | |
1545 | unsigned long page_exec_bit; | |
1546 | ||
1547 | PAGE_KERNEL = __pgprot (_PAGE_PRESENT_4U | _PAGE_VALID | | |
1548 | _PAGE_CACHE_4U | _PAGE_P_4U | | |
1549 | __ACCESS_BITS_4U | __DIRTY_BITS_4U | | |
1550 | _PAGE_EXEC_4U); | |
1551 | PAGE_KERNEL_LOCKED = __pgprot (_PAGE_PRESENT_4U | _PAGE_VALID | | |
1552 | _PAGE_CACHE_4U | _PAGE_P_4U | | |
1553 | __ACCESS_BITS_4U | __DIRTY_BITS_4U | | |
1554 | _PAGE_EXEC_4U | _PAGE_L_4U); | |
1555 | PAGE_EXEC = __pgprot(_PAGE_EXEC_4U); | |
1556 | ||
1557 | _PAGE_IE = _PAGE_IE_4U; | |
1558 | _PAGE_E = _PAGE_E_4U; | |
1559 | _PAGE_CACHE = _PAGE_CACHE_4U; | |
1560 | ||
1561 | pg_iobits = (_PAGE_VALID | _PAGE_PRESENT_4U | __DIRTY_BITS_4U | | |
1562 | __ACCESS_BITS_4U | _PAGE_E_4U); | |
1563 | ||
9cc3a1ac | 1564 | kern_linear_pte_xor[0] = (_PAGE_VALID | _PAGE_SZ4MB_4U) ^ |
c4bce90e | 1565 | 0xfffff80000000000; |
9cc3a1ac DM |
1566 | kern_linear_pte_xor[0] |= (_PAGE_CP_4U | _PAGE_CV_4U | |
1567 | _PAGE_P_4U | _PAGE_W_4U); | |
1568 | ||
1569 | /* XXX Should use 256MB on Panther. XXX */ | |
1570 | kern_linear_pte_xor[1] = kern_linear_pte_xor[0]; | |
c4bce90e DM |
1571 | |
1572 | _PAGE_SZBITS = _PAGE_SZBITS_4U; | |
1573 | _PAGE_ALL_SZ_BITS = (_PAGE_SZ4MB_4U | _PAGE_SZ512K_4U | | |
1574 | _PAGE_SZ64K_4U | _PAGE_SZ8K_4U | | |
1575 | _PAGE_SZ32MB_4U | _PAGE_SZ256MB_4U); | |
1576 | ||
1577 | ||
1578 | page_none = _PAGE_PRESENT_4U | _PAGE_ACCESSED_4U | _PAGE_CACHE_4U; | |
1579 | page_shared = (_PAGE_VALID | _PAGE_PRESENT_4U | _PAGE_CACHE_4U | | |
1580 | __ACCESS_BITS_4U | _PAGE_WRITE_4U | _PAGE_EXEC_4U); | |
1581 | page_copy = (_PAGE_VALID | _PAGE_PRESENT_4U | _PAGE_CACHE_4U | | |
1582 | __ACCESS_BITS_4U | _PAGE_EXEC_4U); | |
1583 | page_readonly = (_PAGE_VALID | _PAGE_PRESENT_4U | _PAGE_CACHE_4U | | |
1584 | __ACCESS_BITS_4U | _PAGE_EXEC_4U); | |
1585 | ||
1586 | page_exec_bit = _PAGE_EXEC_4U; | |
1587 | ||
1588 | prot_init_common(page_none, page_shared, page_copy, page_readonly, | |
1589 | page_exec_bit); | |
1590 | } | |
1591 | ||
1592 | static void __init sun4v_pgprot_init(void) | |
1593 | { | |
1594 | unsigned long page_none, page_shared, page_copy, page_readonly; | |
1595 | unsigned long page_exec_bit; | |
1596 | ||
1597 | PAGE_KERNEL = __pgprot (_PAGE_PRESENT_4V | _PAGE_VALID | | |
1598 | _PAGE_CACHE_4V | _PAGE_P_4V | | |
1599 | __ACCESS_BITS_4V | __DIRTY_BITS_4V | | |
1600 | _PAGE_EXEC_4V); | |
1601 | PAGE_KERNEL_LOCKED = PAGE_KERNEL; | |
1602 | PAGE_EXEC = __pgprot(_PAGE_EXEC_4V); | |
1603 | ||
1604 | _PAGE_IE = _PAGE_IE_4V; | |
1605 | _PAGE_E = _PAGE_E_4V; | |
1606 | _PAGE_CACHE = _PAGE_CACHE_4V; | |
1607 | ||
9cc3a1ac DM |
1608 | kern_linear_pte_xor[0] = (_PAGE_VALID | _PAGE_SZ4MB_4V) ^ |
1609 | 0xfffff80000000000; | |
1610 | kern_linear_pte_xor[0] |= (_PAGE_CP_4V | _PAGE_CV_4V | | |
1611 | _PAGE_P_4V | _PAGE_W_4V); | |
1612 | ||
1613 | kern_linear_pte_xor[1] = (_PAGE_VALID | _PAGE_SZ256MB_4V) ^ | |
c4bce90e | 1614 | 0xfffff80000000000; |
9cc3a1ac DM |
1615 | kern_linear_pte_xor[1] |= (_PAGE_CP_4V | _PAGE_CV_4V | |
1616 | _PAGE_P_4V | _PAGE_W_4V); | |
c4bce90e DM |
1617 | |
1618 | pg_iobits = (_PAGE_VALID | _PAGE_PRESENT_4V | __DIRTY_BITS_4V | | |
1619 | __ACCESS_BITS_4V | _PAGE_E_4V); | |
1620 | ||
1621 | _PAGE_SZBITS = _PAGE_SZBITS_4V; | |
1622 | _PAGE_ALL_SZ_BITS = (_PAGE_SZ16GB_4V | _PAGE_SZ2GB_4V | | |
1623 | _PAGE_SZ256MB_4V | _PAGE_SZ32MB_4V | | |
1624 | _PAGE_SZ4MB_4V | _PAGE_SZ512K_4V | | |
1625 | _PAGE_SZ64K_4V | _PAGE_SZ8K_4V); | |
1626 | ||
1627 | page_none = _PAGE_PRESENT_4V | _PAGE_ACCESSED_4V | _PAGE_CACHE_4V; | |
1628 | page_shared = (_PAGE_VALID | _PAGE_PRESENT_4V | _PAGE_CACHE_4V | | |
1629 | __ACCESS_BITS_4V | _PAGE_WRITE_4V | _PAGE_EXEC_4V); | |
1630 | page_copy = (_PAGE_VALID | _PAGE_PRESENT_4V | _PAGE_CACHE_4V | | |
1631 | __ACCESS_BITS_4V | _PAGE_EXEC_4V); | |
1632 | page_readonly = (_PAGE_VALID | _PAGE_PRESENT_4V | _PAGE_CACHE_4V | | |
1633 | __ACCESS_BITS_4V | _PAGE_EXEC_4V); | |
1634 | ||
1635 | page_exec_bit = _PAGE_EXEC_4V; | |
1636 | ||
1637 | prot_init_common(page_none, page_shared, page_copy, page_readonly, | |
1638 | page_exec_bit); | |
1639 | } | |
1640 | ||
1641 | unsigned long pte_sz_bits(unsigned long sz) | |
1642 | { | |
1643 | if (tlb_type == hypervisor) { | |
1644 | switch (sz) { | |
1645 | case 8 * 1024: | |
1646 | default: | |
1647 | return _PAGE_SZ8K_4V; | |
1648 | case 64 * 1024: | |
1649 | return _PAGE_SZ64K_4V; | |
1650 | case 512 * 1024: | |
1651 | return _PAGE_SZ512K_4V; | |
1652 | case 4 * 1024 * 1024: | |
1653 | return _PAGE_SZ4MB_4V; | |
1654 | }; | |
1655 | } else { | |
1656 | switch (sz) { | |
1657 | case 8 * 1024: | |
1658 | default: | |
1659 | return _PAGE_SZ8K_4U; | |
1660 | case 64 * 1024: | |
1661 | return _PAGE_SZ64K_4U; | |
1662 | case 512 * 1024: | |
1663 | return _PAGE_SZ512K_4U; | |
1664 | case 4 * 1024 * 1024: | |
1665 | return _PAGE_SZ4MB_4U; | |
1666 | }; | |
1667 | } | |
1668 | } | |
1669 | ||
1670 | pte_t mk_pte_io(unsigned long page, pgprot_t prot, int space, unsigned long page_size) | |
1671 | { | |
1672 | pte_t pte; | |
cf627156 DM |
1673 | |
1674 | pte_val(pte) = page | pgprot_val(pgprot_noncached(prot)); | |
c4bce90e DM |
1675 | pte_val(pte) |= (((unsigned long)space) << 32); |
1676 | pte_val(pte) |= pte_sz_bits(page_size); | |
c4bce90e | 1677 | |
cf627156 | 1678 | return pte; |
c4bce90e DM |
1679 | } |
1680 | ||
1681 | static unsigned long kern_large_tte(unsigned long paddr) | |
1682 | { | |
1683 | unsigned long val; | |
1684 | ||
1685 | val = (_PAGE_VALID | _PAGE_SZ4MB_4U | | |
1686 | _PAGE_CP_4U | _PAGE_CV_4U | _PAGE_P_4U | | |
1687 | _PAGE_EXEC_4U | _PAGE_L_4U | _PAGE_W_4U); | |
1688 | if (tlb_type == hypervisor) | |
1689 | val = (_PAGE_VALID | _PAGE_SZ4MB_4V | | |
1690 | _PAGE_CP_4V | _PAGE_CV_4V | _PAGE_P_4V | | |
1691 | _PAGE_EXEC_4V | _PAGE_W_4V); | |
1692 | ||
1693 | return val | paddr; | |
1694 | } | |
1695 | ||
1696 | /* | |
1697 | * Translate PROM's mapping we capture at boot time into physical address. | |
1698 | * The second parameter is only set from prom_callback() invocations. | |
1699 | */ | |
1700 | unsigned long prom_virt_to_phys(unsigned long promva, int *error) | |
1701 | { | |
1702 | unsigned long mask; | |
1703 | int i; | |
1704 | ||
1705 | mask = _PAGE_PADDR_4U; | |
1706 | if (tlb_type == hypervisor) | |
1707 | mask = _PAGE_PADDR_4V; | |
1708 | ||
1709 | for (i = 0; i < prom_trans_ents; i++) { | |
1710 | struct linux_prom_translation *p = &prom_trans[i]; | |
1711 | ||
1712 | if (promva >= p->virt && | |
1713 | promva < (p->virt + p->size)) { | |
1714 | unsigned long base = p->data & mask; | |
1715 | ||
1716 | if (error) | |
1717 | *error = 0; | |
1718 | return base + (promva & (8192 - 1)); | |
1719 | } | |
1720 | } | |
1721 | if (error) | |
1722 | *error = 1; | |
1723 | return 0UL; | |
1724 | } | |
1725 | ||
1726 | /* XXX We should kill off this ugly thing at so me point. XXX */ | |
1727 | unsigned long sun4u_get_pte(unsigned long addr) | |
1728 | { | |
1729 | pgd_t *pgdp; | |
1730 | pud_t *pudp; | |
1731 | pmd_t *pmdp; | |
1732 | pte_t *ptep; | |
1733 | unsigned long mask = _PAGE_PADDR_4U; | |
1734 | ||
1735 | if (tlb_type == hypervisor) | |
1736 | mask = _PAGE_PADDR_4V; | |
1737 | ||
1738 | if (addr >= PAGE_OFFSET) | |
1739 | return addr & mask; | |
1740 | ||
1741 | if ((addr >= LOW_OBP_ADDRESS) && (addr < HI_OBP_ADDRESS)) | |
1742 | return prom_virt_to_phys(addr, NULL); | |
1743 | ||
1744 | pgdp = pgd_offset_k(addr); | |
1745 | pudp = pud_offset(pgdp, addr); | |
1746 | pmdp = pmd_offset(pudp, addr); | |
1747 | ptep = pte_offset_kernel(pmdp, addr); | |
1748 | ||
1749 | return pte_val(*ptep) & mask; | |
1750 | } | |
1751 | ||
1752 | /* If not locked, zap it. */ | |
1753 | void __flush_tlb_all(void) | |
1754 | { | |
1755 | unsigned long pstate; | |
1756 | int i; | |
1757 | ||
1758 | __asm__ __volatile__("flushw\n\t" | |
1759 | "rdpr %%pstate, %0\n\t" | |
1760 | "wrpr %0, %1, %%pstate" | |
1761 | : "=r" (pstate) | |
1762 | : "i" (PSTATE_IE)); | |
1763 | if (tlb_type == spitfire) { | |
1764 | for (i = 0; i < 64; i++) { | |
1765 | /* Spitfire Errata #32 workaround */ | |
1766 | /* NOTE: Always runs on spitfire, so no | |
1767 | * cheetah+ page size encodings. | |
1768 | */ | |
1769 | __asm__ __volatile__("stxa %0, [%1] %2\n\t" | |
1770 | "flush %%g6" | |
1771 | : /* No outputs */ | |
1772 | : "r" (0), | |
1773 | "r" (PRIMARY_CONTEXT), "i" (ASI_DMMU)); | |
1774 | ||
1775 | if (!(spitfire_get_dtlb_data(i) & _PAGE_L_4U)) { | |
1776 | __asm__ __volatile__("stxa %%g0, [%0] %1\n\t" | |
1777 | "membar #Sync" | |
1778 | : /* no outputs */ | |
1779 | : "r" (TLB_TAG_ACCESS), "i" (ASI_DMMU)); | |
1780 | spitfire_put_dtlb_data(i, 0x0UL); | |
1781 | } | |
1782 | ||
1783 | /* Spitfire Errata #32 workaround */ | |
1784 | /* NOTE: Always runs on spitfire, so no | |
1785 | * cheetah+ page size encodings. | |
1786 | */ | |
1787 | __asm__ __volatile__("stxa %0, [%1] %2\n\t" | |
1788 | "flush %%g6" | |
1789 | : /* No outputs */ | |
1790 | : "r" (0), | |
1791 | "r" (PRIMARY_CONTEXT), "i" (ASI_DMMU)); | |
1792 | ||
1793 | if (!(spitfire_get_itlb_data(i) & _PAGE_L_4U)) { | |
1794 | __asm__ __volatile__("stxa %%g0, [%0] %1\n\t" | |
1795 | "membar #Sync" | |
1796 | : /* no outputs */ | |
1797 | : "r" (TLB_TAG_ACCESS), "i" (ASI_IMMU)); | |
1798 | spitfire_put_itlb_data(i, 0x0UL); | |
1799 | } | |
1800 | } | |
1801 | } else if (tlb_type == cheetah || tlb_type == cheetah_plus) { | |
1802 | cheetah_flush_dtlb_all(); | |
1803 | cheetah_flush_itlb_all(); | |
1804 | } | |
1805 | __asm__ __volatile__("wrpr %0, 0, %%pstate" | |
1806 | : : "r" (pstate)); | |
1807 | } | |
88d70794 DM |
1808 | |
1809 | #ifdef CONFIG_MEMORY_HOTPLUG | |
1810 | ||
1811 | void online_page(struct page *page) | |
1812 | { | |
1813 | ClearPageReserved(page); | |
1814 | set_page_count(page, 0); | |
1815 | free_cold_page(page); | |
1816 | totalram_pages++; | |
1817 | num_physpages++; | |
1818 | } | |
1819 | ||
1820 | int remove_memory(u64 start, u64 size) | |
1821 | { | |
1822 | return -EINVAL; | |
1823 | } | |
1824 | ||
1825 | #endif /* CONFIG_MEMORY_HOTPLUG */ |