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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> | |
9 | #include <linux/kernel.h> | |
10 | #include <linux/sched.h> | |
11 | #include <linux/string.h> | |
12 | #include <linux/init.h> | |
13 | #include <linux/bootmem.h> | |
14 | #include <linux/mm.h> | |
15 | #include <linux/hugetlb.h> | |
16 | #include <linux/slab.h> | |
17 | #include <linux/initrd.h> | |
18 | #include <linux/swap.h> | |
19 | #include <linux/pagemap.h> | |
20 | #include <linux/fs.h> | |
21 | #include <linux/seq_file.h> | |
05e14cb3 | 22 | #include <linux/kprobes.h> |
1ac4f5eb | 23 | #include <linux/cache.h> |
1da177e4 LT |
24 | |
25 | #include <asm/head.h> | |
26 | #include <asm/system.h> | |
27 | #include <asm/page.h> | |
28 | #include <asm/pgalloc.h> | |
29 | #include <asm/pgtable.h> | |
30 | #include <asm/oplib.h> | |
31 | #include <asm/iommu.h> | |
32 | #include <asm/io.h> | |
33 | #include <asm/uaccess.h> | |
34 | #include <asm/mmu_context.h> | |
35 | #include <asm/tlbflush.h> | |
36 | #include <asm/dma.h> | |
37 | #include <asm/starfire.h> | |
38 | #include <asm/tlb.h> | |
39 | #include <asm/spitfire.h> | |
40 | #include <asm/sections.h> | |
41 | ||
42 | extern void device_scan(void); | |
43 | ||
44 | struct sparc_phys_banks sp_banks[SPARC_PHYS_BANKS]; | |
45 | ||
46 | unsigned long *sparc64_valid_addr_bitmap; | |
47 | ||
48 | /* Ugly, but necessary... -DaveM */ | |
1ac4f5eb DM |
49 | unsigned long phys_base __read_mostly; |
50 | unsigned long kern_base __read_mostly; | |
51 | unsigned long kern_size __read_mostly; | |
52 | unsigned long pfn_base __read_mostly; | |
1da177e4 LT |
53 | |
54 | /* This is even uglier. We have a problem where the kernel may not be | |
55 | * located at phys_base. However, initial __alloc_bootmem() calls need to | |
56 | * be adjusted to be within the 4-8Megs that the kernel is mapped to, else | |
57 | * those page mappings wont work. Things are ok after inherit_prom_mappings | |
58 | * is called though. Dave says he'll clean this up some other time. | |
59 | * -- BenC | |
60 | */ | |
61 | static unsigned long bootmap_base; | |
62 | ||
63 | /* get_new_mmu_context() uses "cache + 1". */ | |
64 | DEFINE_SPINLOCK(ctx_alloc_lock); | |
65 | unsigned long tlb_context_cache = CTX_FIRST_VERSION - 1; | |
66 | #define CTX_BMAP_SLOTS (1UL << (CTX_NR_BITS - 6)) | |
67 | unsigned long mmu_context_bmap[CTX_BMAP_SLOTS]; | |
68 | ||
69 | /* References to special section boundaries */ | |
70 | extern char _start[], _end[]; | |
71 | ||
72 | /* Initial ramdisk setup */ | |
73 | extern unsigned long sparc_ramdisk_image64; | |
74 | extern unsigned int sparc_ramdisk_image; | |
75 | extern unsigned int sparc_ramdisk_size; | |
76 | ||
1ac4f5eb | 77 | struct page *mem_map_zero __read_mostly; |
1da177e4 LT |
78 | |
79 | int bigkernel = 0; | |
80 | ||
81 | /* XXX Tune this... */ | |
82 | #define PGT_CACHE_LOW 25 | |
83 | #define PGT_CACHE_HIGH 50 | |
84 | ||
85 | void check_pgt_cache(void) | |
86 | { | |
87 | preempt_disable(); | |
88 | if (pgtable_cache_size > PGT_CACHE_HIGH) { | |
89 | do { | |
90 | if (pgd_quicklist) | |
91 | free_pgd_slow(get_pgd_fast()); | |
92 | if (pte_quicklist[0]) | |
93 | free_pte_slow(pte_alloc_one_fast(NULL, 0)); | |
94 | if (pte_quicklist[1]) | |
95 | free_pte_slow(pte_alloc_one_fast(NULL, 1 << (PAGE_SHIFT + 10))); | |
96 | } while (pgtable_cache_size > PGT_CACHE_LOW); | |
97 | } | |
98 | preempt_enable(); | |
99 | } | |
100 | ||
101 | #ifdef CONFIG_DEBUG_DCFLUSH | |
102 | atomic_t dcpage_flushes = ATOMIC_INIT(0); | |
103 | #ifdef CONFIG_SMP | |
104 | atomic_t dcpage_flushes_xcall = ATOMIC_INIT(0); | |
105 | #endif | |
106 | #endif | |
107 | ||
108 | __inline__ void flush_dcache_page_impl(struct page *page) | |
109 | { | |
110 | #ifdef CONFIG_DEBUG_DCFLUSH | |
111 | atomic_inc(&dcpage_flushes); | |
112 | #endif | |
113 | ||
114 | #ifdef DCACHE_ALIASING_POSSIBLE | |
115 | __flush_dcache_page(page_address(page), | |
116 | ((tlb_type == spitfire) && | |
117 | page_mapping(page) != NULL)); | |
118 | #else | |
119 | if (page_mapping(page) != NULL && | |
120 | tlb_type == spitfire) | |
121 | __flush_icache_page(__pa(page_address(page))); | |
122 | #endif | |
123 | } | |
124 | ||
125 | #define PG_dcache_dirty PG_arch_1 | |
48b0e548 DM |
126 | #define PG_dcache_cpu_shift 24 |
127 | #define PG_dcache_cpu_mask (256 - 1) | |
128 | ||
129 | #if NR_CPUS > 256 | |
130 | #error D-cache dirty tracking and thread_info->cpu need fixing for > 256 cpus | |
131 | #endif | |
1da177e4 LT |
132 | |
133 | #define dcache_dirty_cpu(page) \ | |
48b0e548 | 134 | (((page)->flags >> PG_dcache_cpu_shift) & PG_dcache_cpu_mask) |
1da177e4 LT |
135 | |
136 | static __inline__ void set_dcache_dirty(struct page *page, int this_cpu) | |
137 | { | |
138 | unsigned long mask = this_cpu; | |
48b0e548 DM |
139 | unsigned long non_cpu_bits; |
140 | ||
141 | non_cpu_bits = ~(PG_dcache_cpu_mask << PG_dcache_cpu_shift); | |
142 | mask = (mask << PG_dcache_cpu_shift) | (1UL << PG_dcache_dirty); | |
143 | ||
1da177e4 LT |
144 | __asm__ __volatile__("1:\n\t" |
145 | "ldx [%2], %%g7\n\t" | |
146 | "and %%g7, %1, %%g1\n\t" | |
147 | "or %%g1, %0, %%g1\n\t" | |
148 | "casx [%2], %%g7, %%g1\n\t" | |
149 | "cmp %%g7, %%g1\n\t" | |
b445e26c | 150 | "membar #StoreLoad | #StoreStore\n\t" |
1da177e4 | 151 | "bne,pn %%xcc, 1b\n\t" |
b445e26c | 152 | " nop" |
1da177e4 LT |
153 | : /* no outputs */ |
154 | : "r" (mask), "r" (non_cpu_bits), "r" (&page->flags) | |
155 | : "g1", "g7"); | |
156 | } | |
157 | ||
158 | static __inline__ void clear_dcache_dirty_cpu(struct page *page, unsigned long cpu) | |
159 | { | |
160 | unsigned long mask = (1UL << PG_dcache_dirty); | |
161 | ||
162 | __asm__ __volatile__("! test_and_clear_dcache_dirty\n" | |
163 | "1:\n\t" | |
164 | "ldx [%2], %%g7\n\t" | |
48b0e548 | 165 | "srlx %%g7, %4, %%g1\n\t" |
1da177e4 LT |
166 | "and %%g1, %3, %%g1\n\t" |
167 | "cmp %%g1, %0\n\t" | |
168 | "bne,pn %%icc, 2f\n\t" | |
169 | " andn %%g7, %1, %%g1\n\t" | |
170 | "casx [%2], %%g7, %%g1\n\t" | |
171 | "cmp %%g7, %%g1\n\t" | |
b445e26c | 172 | "membar #StoreLoad | #StoreStore\n\t" |
1da177e4 | 173 | "bne,pn %%xcc, 1b\n\t" |
b445e26c | 174 | " nop\n" |
1da177e4 LT |
175 | "2:" |
176 | : /* no outputs */ | |
177 | : "r" (cpu), "r" (mask), "r" (&page->flags), | |
48b0e548 DM |
178 | "i" (PG_dcache_cpu_mask), |
179 | "i" (PG_dcache_cpu_shift) | |
1da177e4 LT |
180 | : "g1", "g7"); |
181 | } | |
182 | ||
183 | extern void __update_mmu_cache(unsigned long mmu_context_hw, unsigned long address, pte_t pte, int code); | |
184 | ||
185 | void update_mmu_cache(struct vm_area_struct *vma, unsigned long address, pte_t pte) | |
186 | { | |
187 | struct page *page; | |
188 | unsigned long pfn; | |
189 | unsigned long pg_flags; | |
190 | ||
191 | pfn = pte_pfn(pte); | |
192 | if (pfn_valid(pfn) && | |
193 | (page = pfn_to_page(pfn), page_mapping(page)) && | |
194 | ((pg_flags = page->flags) & (1UL << PG_dcache_dirty))) { | |
48b0e548 DM |
195 | int cpu = ((pg_flags >> PG_dcache_cpu_shift) & |
196 | PG_dcache_cpu_mask); | |
1da177e4 LT |
197 | int this_cpu = get_cpu(); |
198 | ||
199 | /* This is just to optimize away some function calls | |
200 | * in the SMP case. | |
201 | */ | |
202 | if (cpu == this_cpu) | |
203 | flush_dcache_page_impl(page); | |
204 | else | |
205 | smp_flush_dcache_page_impl(page, cpu); | |
206 | ||
207 | clear_dcache_dirty_cpu(page, cpu); | |
208 | ||
209 | put_cpu(); | |
210 | } | |
211 | ||
212 | if (get_thread_fault_code()) | |
213 | __update_mmu_cache(CTX_NRBITS(vma->vm_mm->context), | |
214 | address, pte, get_thread_fault_code()); | |
215 | } | |
216 | ||
217 | void flush_dcache_page(struct page *page) | |
218 | { | |
a9546f59 DM |
219 | struct address_space *mapping; |
220 | int this_cpu; | |
1da177e4 | 221 | |
a9546f59 DM |
222 | /* Do not bother with the expensive D-cache flush if it |
223 | * is merely the zero page. The 'bigcore' testcase in GDB | |
224 | * causes this case to run millions of times. | |
225 | */ | |
226 | if (page == ZERO_PAGE(0)) | |
227 | return; | |
228 | ||
229 | this_cpu = get_cpu(); | |
230 | ||
231 | mapping = page_mapping(page); | |
1da177e4 | 232 | if (mapping && !mapping_mapped(mapping)) { |
a9546f59 | 233 | int dirty = test_bit(PG_dcache_dirty, &page->flags); |
1da177e4 | 234 | if (dirty) { |
a9546f59 DM |
235 | int dirty_cpu = dcache_dirty_cpu(page); |
236 | ||
1da177e4 LT |
237 | if (dirty_cpu == this_cpu) |
238 | goto out; | |
239 | smp_flush_dcache_page_impl(page, dirty_cpu); | |
240 | } | |
241 | set_dcache_dirty(page, this_cpu); | |
242 | } else { | |
243 | /* We could delay the flush for the !page_mapping | |
244 | * case too. But that case is for exec env/arg | |
245 | * pages and those are %99 certainly going to get | |
246 | * faulted into the tlb (and thus flushed) anyways. | |
247 | */ | |
248 | flush_dcache_page_impl(page); | |
249 | } | |
250 | ||
251 | out: | |
252 | put_cpu(); | |
253 | } | |
254 | ||
05e14cb3 | 255 | void __kprobes flush_icache_range(unsigned long start, unsigned long end) |
1da177e4 LT |
256 | { |
257 | /* Cheetah has coherent I-cache. */ | |
258 | if (tlb_type == spitfire) { | |
259 | unsigned long kaddr; | |
260 | ||
261 | for (kaddr = start; kaddr < end; kaddr += PAGE_SIZE) | |
262 | __flush_icache_page(__get_phys(kaddr)); | |
263 | } | |
264 | } | |
265 | ||
266 | unsigned long page_to_pfn(struct page *page) | |
267 | { | |
268 | return (unsigned long) ((page - mem_map) + pfn_base); | |
269 | } | |
270 | ||
271 | struct page *pfn_to_page(unsigned long pfn) | |
272 | { | |
273 | return (mem_map + (pfn - pfn_base)); | |
274 | } | |
275 | ||
276 | void show_mem(void) | |
277 | { | |
278 | printk("Mem-info:\n"); | |
279 | show_free_areas(); | |
280 | printk("Free swap: %6ldkB\n", | |
281 | nr_swap_pages << (PAGE_SHIFT-10)); | |
282 | printk("%ld pages of RAM\n", num_physpages); | |
283 | printk("%d free pages\n", nr_free_pages()); | |
284 | printk("%d pages in page table cache\n",pgtable_cache_size); | |
285 | } | |
286 | ||
287 | void mmu_info(struct seq_file *m) | |
288 | { | |
289 | if (tlb_type == cheetah) | |
290 | seq_printf(m, "MMU Type\t: Cheetah\n"); | |
291 | else if (tlb_type == cheetah_plus) | |
292 | seq_printf(m, "MMU Type\t: Cheetah+\n"); | |
293 | else if (tlb_type == spitfire) | |
294 | seq_printf(m, "MMU Type\t: Spitfire\n"); | |
295 | else | |
296 | seq_printf(m, "MMU Type\t: ???\n"); | |
297 | ||
298 | #ifdef CONFIG_DEBUG_DCFLUSH | |
299 | seq_printf(m, "DCPageFlushes\t: %d\n", | |
300 | atomic_read(&dcpage_flushes)); | |
301 | #ifdef CONFIG_SMP | |
302 | seq_printf(m, "DCPageFlushesXC\t: %d\n", | |
303 | atomic_read(&dcpage_flushes_xcall)); | |
304 | #endif /* CONFIG_SMP */ | |
305 | #endif /* CONFIG_DEBUG_DCFLUSH */ | |
306 | } | |
307 | ||
308 | struct linux_prom_translation { | |
309 | unsigned long virt; | |
310 | unsigned long size; | |
311 | unsigned long data; | |
312 | }; | |
b206fc4c | 313 | static struct linux_prom_translation prom_trans[512] __initdata; |
1da177e4 LT |
314 | |
315 | extern unsigned long prom_boot_page; | |
316 | extern void prom_remap(unsigned long physpage, unsigned long virtpage, int mmu_ihandle); | |
317 | extern int prom_get_mmu_ihandle(void); | |
318 | extern void register_prom_callbacks(void); | |
319 | ||
320 | /* Exported for SMP bootup purposes. */ | |
321 | unsigned long kern_locked_tte_data; | |
322 | ||
1ac4f5eb DM |
323 | /* Exported for kernel TLB miss handling in ktlb.S */ |
324 | unsigned long prom_pmd_phys __read_mostly; | |
325 | unsigned int swapper_pgd_zero __read_mostly; | |
326 | ||
1da177e4 LT |
327 | void __init early_pgtable_allocfail(char *type) |
328 | { | |
329 | prom_printf("inherit_prom_mappings: Cannot alloc kernel %s.\n", type); | |
330 | prom_halt(); | |
331 | } | |
332 | ||
333 | #define BASE_PAGE_SIZE 8192 | |
334 | static pmd_t *prompmd; | |
335 | ||
336 | /* | |
337 | * Translate PROM's mapping we capture at boot time into physical address. | |
338 | * The second parameter is only set from prom_callback() invocations. | |
339 | */ | |
340 | unsigned long prom_virt_to_phys(unsigned long promva, int *error) | |
341 | { | |
342 | pmd_t *pmdp = prompmd + ((promva >> 23) & 0x7ff); | |
343 | pte_t *ptep; | |
344 | unsigned long base; | |
345 | ||
346 | if (pmd_none(*pmdp)) { | |
347 | if (error) | |
348 | *error = 1; | |
349 | return(0); | |
350 | } | |
351 | ptep = (pte_t *)__pmd_page(*pmdp) + ((promva >> 13) & 0x3ff); | |
352 | if (!pte_present(*ptep)) { | |
353 | if (error) | |
354 | *error = 1; | |
355 | return(0); | |
356 | } | |
357 | if (error) { | |
358 | *error = 0; | |
359 | return(pte_val(*ptep)); | |
360 | } | |
361 | base = pte_val(*ptep) & _PAGE_PADDR; | |
362 | return(base + (promva & (BASE_PAGE_SIZE - 1))); | |
363 | } | |
364 | ||
365 | static void inherit_prom_mappings(void) | |
366 | { | |
1da177e4 LT |
367 | unsigned long phys_page, tte_vaddr, tte_data; |
368 | void (*remap_func)(unsigned long, unsigned long, int); | |
369 | pmd_t *pmdp; | |
370 | pte_t *ptep; | |
371 | int node, n, i, tsz; | |
1da177e4 LT |
372 | |
373 | node = prom_finddevice("/virtual-memory"); | |
374 | n = prom_getproplen(node, "translations"); | |
375 | if (n == 0 || n == -1) { | |
b206fc4c | 376 | prom_printf("prom_mappings: Couldn't get size.\n"); |
1da177e4 LT |
377 | prom_halt(); |
378 | } | |
b206fc4c DM |
379 | n += 24 * sizeof(struct linux_prom_translation); |
380 | if (n > sizeof(prom_trans)) { | |
381 | prom_printf("prom_mappings: prom_trans too small, " | |
382 | "need %Zd bytes\n", n); | |
1da177e4 LT |
383 | prom_halt(); |
384 | } | |
b206fc4c DM |
385 | tsz = n; |
386 | if ((n = prom_getproperty(node, "translations", | |
387 | (char *)&prom_trans[0], tsz)) == -1) { | |
388 | prom_printf("prom_mappings: Couldn't get property.\n"); | |
1da177e4 LT |
389 | prom_halt(); |
390 | } | |
b206fc4c | 391 | n = n / sizeof(struct linux_prom_translation); |
1da177e4 | 392 | |
b206fc4c DM |
393 | /* The obp translations are saved based on 8k pagesize, since obp |
394 | * can use a mixture of pagesizes. Misses to the 0xf0000000 -> | |
395 | * 0x100000000, ie obp range, are handled in entry.S and do not | |
396 | * use the vpte scheme (see rant: inherit_locked_prom_mappings). | |
1da177e4 LT |
397 | */ |
398 | #define OBP_PMD_SIZE 2048 | |
399 | prompmd = __alloc_bootmem(OBP_PMD_SIZE, OBP_PMD_SIZE, bootmap_base); | |
400 | if (prompmd == NULL) | |
401 | early_pgtable_allocfail("pmd"); | |
402 | memset(prompmd, 0, OBP_PMD_SIZE); | |
403 | for (i = 0; i < n; i++) { | |
404 | unsigned long vaddr; | |
405 | ||
b206fc4c DM |
406 | if (prom_trans[i].virt >= LOW_OBP_ADDRESS && prom_trans[i].virt < HI_OBP_ADDRESS) { |
407 | for (vaddr = prom_trans[i].virt; | |
408 | ((vaddr < prom_trans[i].virt + prom_trans[i].size) && | |
1da177e4 LT |
409 | (vaddr < HI_OBP_ADDRESS)); |
410 | vaddr += BASE_PAGE_SIZE) { | |
411 | unsigned long val; | |
412 | ||
413 | pmdp = prompmd + ((vaddr >> 23) & 0x7ff); | |
414 | if (pmd_none(*pmdp)) { | |
415 | ptep = __alloc_bootmem(BASE_PAGE_SIZE, | |
416 | BASE_PAGE_SIZE, | |
417 | bootmap_base); | |
418 | if (ptep == NULL) | |
419 | early_pgtable_allocfail("pte"); | |
420 | memset(ptep, 0, BASE_PAGE_SIZE); | |
421 | pmd_set(pmdp, ptep); | |
422 | } | |
423 | ptep = (pte_t *)__pmd_page(*pmdp) + | |
424 | ((vaddr >> 13) & 0x3ff); | |
425 | ||
b206fc4c | 426 | val = prom_trans[i].data; |
1da177e4 LT |
427 | |
428 | /* Clear diag TTE bits. */ | |
429 | if (tlb_type == spitfire) | |
430 | val &= ~0x0003fe0000000000UL; | |
431 | ||
432 | set_pte_at(&init_mm, vaddr, | |
433 | ptep, __pte(val | _PAGE_MODIFIED)); | |
b206fc4c | 434 | prom_trans[i].data += BASE_PAGE_SIZE; |
1da177e4 LT |
435 | } |
436 | } | |
437 | } | |
1ac4f5eb | 438 | prom_pmd_phys = __pa(prompmd); |
1da177e4 LT |
439 | |
440 | /* Now fixup OBP's idea about where we really are mapped. */ | |
441 | prom_printf("Remapping the kernel... "); | |
442 | ||
443 | /* Spitfire Errata #32 workaround */ | |
444 | /* NOTE: Using plain zero for the context value is | |
445 | * correct here, we are not using the Linux trap | |
446 | * tables yet so we should not use the special | |
447 | * UltraSPARC-III+ page size encodings yet. | |
448 | */ | |
449 | __asm__ __volatile__("stxa %0, [%1] %2\n\t" | |
450 | "flush %%g6" | |
451 | : /* No outputs */ | |
452 | : "r" (0), "r" (PRIMARY_CONTEXT), "i" (ASI_DMMU)); | |
453 | ||
454 | switch (tlb_type) { | |
455 | default: | |
456 | case spitfire: | |
457 | phys_page = spitfire_get_dtlb_data(sparc64_highest_locked_tlbent()); | |
458 | break; | |
459 | ||
460 | case cheetah: | |
461 | case cheetah_plus: | |
462 | phys_page = cheetah_get_litlb_data(sparc64_highest_locked_tlbent()); | |
463 | break; | |
464 | }; | |
465 | ||
466 | phys_page &= _PAGE_PADDR; | |
467 | phys_page += ((unsigned long)&prom_boot_page - | |
468 | (unsigned long)KERNBASE); | |
469 | ||
470 | if (tlb_type == spitfire) { | |
471 | /* Lock this into i/d tlb entry 59 */ | |
472 | __asm__ __volatile__( | |
473 | "stxa %%g0, [%2] %3\n\t" | |
474 | "stxa %0, [%1] %4\n\t" | |
475 | "membar #Sync\n\t" | |
476 | "flush %%g6\n\t" | |
477 | "stxa %%g0, [%2] %5\n\t" | |
478 | "stxa %0, [%1] %6\n\t" | |
479 | "membar #Sync\n\t" | |
480 | "flush %%g6" | |
481 | : : "r" (phys_page | _PAGE_VALID | _PAGE_SZ8K | _PAGE_CP | | |
482 | _PAGE_CV | _PAGE_P | _PAGE_L | _PAGE_W), | |
483 | "r" (59 << 3), "r" (TLB_TAG_ACCESS), | |
484 | "i" (ASI_DMMU), "i" (ASI_DTLB_DATA_ACCESS), | |
485 | "i" (ASI_IMMU), "i" (ASI_ITLB_DATA_ACCESS) | |
486 | : "memory"); | |
487 | } else if (tlb_type == cheetah || tlb_type == cheetah_plus) { | |
488 | /* Lock this into i/d tlb-0 entry 11 */ | |
489 | __asm__ __volatile__( | |
490 | "stxa %%g0, [%2] %3\n\t" | |
491 | "stxa %0, [%1] %4\n\t" | |
492 | "membar #Sync\n\t" | |
493 | "flush %%g6\n\t" | |
494 | "stxa %%g0, [%2] %5\n\t" | |
495 | "stxa %0, [%1] %6\n\t" | |
496 | "membar #Sync\n\t" | |
497 | "flush %%g6" | |
498 | : : "r" (phys_page | _PAGE_VALID | _PAGE_SZ8K | _PAGE_CP | | |
499 | _PAGE_CV | _PAGE_P | _PAGE_L | _PAGE_W), | |
500 | "r" ((0 << 16) | (11 << 3)), "r" (TLB_TAG_ACCESS), | |
501 | "i" (ASI_DMMU), "i" (ASI_DTLB_DATA_ACCESS), | |
502 | "i" (ASI_IMMU), "i" (ASI_ITLB_DATA_ACCESS) | |
503 | : "memory"); | |
504 | } else { | |
505 | /* Implement me :-) */ | |
506 | BUG(); | |
507 | } | |
508 | ||
509 | tte_vaddr = (unsigned long) KERNBASE; | |
510 | ||
511 | /* Spitfire Errata #32 workaround */ | |
512 | /* NOTE: Using plain zero for the context value is | |
513 | * correct here, we are not using the Linux trap | |
514 | * tables yet so we should not use the special | |
515 | * UltraSPARC-III+ page size encodings yet. | |
516 | */ | |
517 | __asm__ __volatile__("stxa %0, [%1] %2\n\t" | |
518 | "flush %%g6" | |
519 | : /* No outputs */ | |
520 | : "r" (0), | |
521 | "r" (PRIMARY_CONTEXT), "i" (ASI_DMMU)); | |
522 | ||
523 | if (tlb_type == spitfire) | |
524 | tte_data = spitfire_get_dtlb_data(sparc64_highest_locked_tlbent()); | |
525 | else | |
526 | tte_data = cheetah_get_ldtlb_data(sparc64_highest_locked_tlbent()); | |
527 | ||
528 | kern_locked_tte_data = tte_data; | |
529 | ||
530 | remap_func = (void *) ((unsigned long) &prom_remap - | |
531 | (unsigned long) &prom_boot_page); | |
532 | ||
533 | ||
534 | /* Spitfire Errata #32 workaround */ | |
535 | /* NOTE: Using plain zero for the context value is | |
536 | * correct here, we are not using the Linux trap | |
537 | * tables yet so we should not use the special | |
538 | * UltraSPARC-III+ page size encodings yet. | |
539 | */ | |
540 | __asm__ __volatile__("stxa %0, [%1] %2\n\t" | |
541 | "flush %%g6" | |
542 | : /* No outputs */ | |
543 | : "r" (0), | |
544 | "r" (PRIMARY_CONTEXT), "i" (ASI_DMMU)); | |
545 | ||
546 | remap_func((tlb_type == spitfire ? | |
547 | (spitfire_get_dtlb_data(sparc64_highest_locked_tlbent()) & _PAGE_PADDR) : | |
548 | (cheetah_get_litlb_data(sparc64_highest_locked_tlbent()) & _PAGE_PADDR)), | |
549 | (unsigned long) KERNBASE, | |
550 | prom_get_mmu_ihandle()); | |
551 | ||
552 | if (bigkernel) | |
553 | remap_func(((tte_data + 0x400000) & _PAGE_PADDR), | |
554 | (unsigned long) KERNBASE + 0x400000, prom_get_mmu_ihandle()); | |
555 | ||
556 | /* Flush out that temporary mapping. */ | |
557 | spitfire_flush_dtlb_nucleus_page(0x0); | |
558 | spitfire_flush_itlb_nucleus_page(0x0); | |
559 | ||
560 | /* Now lock us back into the TLBs via OBP. */ | |
561 | prom_dtlb_load(sparc64_highest_locked_tlbent(), tte_data, tte_vaddr); | |
562 | prom_itlb_load(sparc64_highest_locked_tlbent(), tte_data, tte_vaddr); | |
563 | if (bigkernel) { | |
564 | prom_dtlb_load(sparc64_highest_locked_tlbent()-1, tte_data + 0x400000, | |
565 | tte_vaddr + 0x400000); | |
566 | prom_itlb_load(sparc64_highest_locked_tlbent()-1, tte_data + 0x400000, | |
567 | tte_vaddr + 0x400000); | |
568 | } | |
569 | ||
570 | /* Re-read translations property. */ | |
b206fc4c DM |
571 | if ((n = prom_getproperty(node, "translations", |
572 | (char *)&prom_trans[0], tsz)) == -1) { | |
573 | prom_printf("prom_mappings: Can't reread prom_trans.\n"); | |
1da177e4 LT |
574 | prom_halt(); |
575 | } | |
b206fc4c | 576 | n = n / sizeof(struct linux_prom_translation); |
1da177e4 LT |
577 | |
578 | for (i = 0; i < n; i++) { | |
b206fc4c DM |
579 | unsigned long vaddr = prom_trans[i].virt; |
580 | unsigned long size = prom_trans[i].size; | |
1da177e4 LT |
581 | |
582 | if (vaddr < 0xf0000000UL) { | |
583 | unsigned long avoid_start = (unsigned long) KERNBASE; | |
584 | unsigned long avoid_end = avoid_start + (4 * 1024 * 1024); | |
585 | ||
586 | if (bigkernel) | |
587 | avoid_end += (4 * 1024 * 1024); | |
588 | if (vaddr < avoid_start) { | |
589 | unsigned long top = vaddr + size; | |
590 | ||
591 | if (top > avoid_start) | |
592 | top = avoid_start; | |
593 | prom_unmap(top - vaddr, vaddr); | |
594 | } | |
595 | if ((vaddr + size) > avoid_end) { | |
596 | unsigned long bottom = vaddr; | |
597 | ||
598 | if (bottom < avoid_end) | |
599 | bottom = avoid_end; | |
600 | prom_unmap((vaddr + size) - bottom, bottom); | |
601 | } | |
602 | } | |
603 | } | |
604 | ||
605 | prom_printf("done.\n"); | |
606 | ||
607 | register_prom_callbacks(); | |
608 | } | |
609 | ||
610 | /* The OBP specifications for sun4u mark 0xfffffffc00000000 and | |
611 | * upwards as reserved for use by the firmware (I wonder if this | |
612 | * will be the same on Cheetah...). We use this virtual address | |
613 | * range for the VPTE table mappings of the nucleus so we need | |
614 | * to zap them when we enter the PROM. -DaveM | |
615 | */ | |
616 | static void __flush_nucleus_vptes(void) | |
617 | { | |
618 | unsigned long prom_reserved_base = 0xfffffffc00000000UL; | |
619 | int i; | |
620 | ||
621 | /* Only DTLB must be checked for VPTE entries. */ | |
622 | if (tlb_type == spitfire) { | |
623 | for (i = 0; i < 63; i++) { | |
624 | unsigned long tag; | |
625 | ||
626 | /* Spitfire Errata #32 workaround */ | |
627 | /* NOTE: Always runs on spitfire, so no cheetah+ | |
628 | * page size encodings. | |
629 | */ | |
630 | __asm__ __volatile__("stxa %0, [%1] %2\n\t" | |
631 | "flush %%g6" | |
632 | : /* No outputs */ | |
633 | : "r" (0), | |
634 | "r" (PRIMARY_CONTEXT), "i" (ASI_DMMU)); | |
635 | ||
636 | tag = spitfire_get_dtlb_tag(i); | |
637 | if (((tag & ~(PAGE_MASK)) == 0) && | |
638 | ((tag & (PAGE_MASK)) >= prom_reserved_base)) { | |
639 | __asm__ __volatile__("stxa %%g0, [%0] %1\n\t" | |
640 | "membar #Sync" | |
641 | : /* no outputs */ | |
642 | : "r" (TLB_TAG_ACCESS), "i" (ASI_DMMU)); | |
643 | spitfire_put_dtlb_data(i, 0x0UL); | |
644 | } | |
645 | } | |
646 | } else if (tlb_type == cheetah || tlb_type == cheetah_plus) { | |
647 | for (i = 0; i < 512; i++) { | |
648 | unsigned long tag = cheetah_get_dtlb_tag(i, 2); | |
649 | ||
650 | if ((tag & ~PAGE_MASK) == 0 && | |
651 | (tag & PAGE_MASK) >= prom_reserved_base) { | |
652 | __asm__ __volatile__("stxa %%g0, [%0] %1\n\t" | |
653 | "membar #Sync" | |
654 | : /* no outputs */ | |
655 | : "r" (TLB_TAG_ACCESS), "i" (ASI_DMMU)); | |
656 | cheetah_put_dtlb_data(i, 0x0UL, 2); | |
657 | } | |
658 | ||
659 | if (tlb_type != cheetah_plus) | |
660 | continue; | |
661 | ||
662 | tag = cheetah_get_dtlb_tag(i, 3); | |
663 | ||
664 | if ((tag & ~PAGE_MASK) == 0 && | |
665 | (tag & PAGE_MASK) >= prom_reserved_base) { | |
666 | __asm__ __volatile__("stxa %%g0, [%0] %1\n\t" | |
667 | "membar #Sync" | |
668 | : /* no outputs */ | |
669 | : "r" (TLB_TAG_ACCESS), "i" (ASI_DMMU)); | |
670 | cheetah_put_dtlb_data(i, 0x0UL, 3); | |
671 | } | |
672 | } | |
673 | } else { | |
674 | /* Implement me :-) */ | |
675 | BUG(); | |
676 | } | |
677 | } | |
678 | ||
679 | static int prom_ditlb_set; | |
680 | struct prom_tlb_entry { | |
681 | int tlb_ent; | |
682 | unsigned long tlb_tag; | |
683 | unsigned long tlb_data; | |
684 | }; | |
685 | struct prom_tlb_entry prom_itlb[16], prom_dtlb[16]; | |
686 | ||
687 | void prom_world(int enter) | |
688 | { | |
689 | unsigned long pstate; | |
690 | int i; | |
691 | ||
692 | if (!enter) | |
693 | set_fs((mm_segment_t) { get_thread_current_ds() }); | |
694 | ||
695 | if (!prom_ditlb_set) | |
696 | return; | |
697 | ||
698 | /* Make sure the following runs atomically. */ | |
699 | __asm__ __volatile__("flushw\n\t" | |
700 | "rdpr %%pstate, %0\n\t" | |
701 | "wrpr %0, %1, %%pstate" | |
702 | : "=r" (pstate) | |
703 | : "i" (PSTATE_IE)); | |
704 | ||
705 | if (enter) { | |
706 | /* Kick out nucleus VPTEs. */ | |
707 | __flush_nucleus_vptes(); | |
708 | ||
709 | /* Install PROM world. */ | |
710 | for (i = 0; i < 16; i++) { | |
711 | if (prom_dtlb[i].tlb_ent != -1) { | |
712 | __asm__ __volatile__("stxa %0, [%1] %2\n\t" | |
713 | "membar #Sync" | |
714 | : : "r" (prom_dtlb[i].tlb_tag), "r" (TLB_TAG_ACCESS), | |
715 | "i" (ASI_DMMU)); | |
716 | if (tlb_type == spitfire) | |
717 | spitfire_put_dtlb_data(prom_dtlb[i].tlb_ent, | |
718 | prom_dtlb[i].tlb_data); | |
719 | else if (tlb_type == cheetah || tlb_type == cheetah_plus) | |
720 | cheetah_put_ldtlb_data(prom_dtlb[i].tlb_ent, | |
721 | prom_dtlb[i].tlb_data); | |
722 | } | |
723 | if (prom_itlb[i].tlb_ent != -1) { | |
724 | __asm__ __volatile__("stxa %0, [%1] %2\n\t" | |
725 | "membar #Sync" | |
726 | : : "r" (prom_itlb[i].tlb_tag), | |
727 | "r" (TLB_TAG_ACCESS), | |
728 | "i" (ASI_IMMU)); | |
729 | if (tlb_type == spitfire) | |
730 | spitfire_put_itlb_data(prom_itlb[i].tlb_ent, | |
731 | prom_itlb[i].tlb_data); | |
732 | else if (tlb_type == cheetah || tlb_type == cheetah_plus) | |
733 | cheetah_put_litlb_data(prom_itlb[i].tlb_ent, | |
734 | prom_itlb[i].tlb_data); | |
735 | } | |
736 | } | |
737 | } else { | |
738 | for (i = 0; i < 16; i++) { | |
739 | if (prom_dtlb[i].tlb_ent != -1) { | |
740 | __asm__ __volatile__("stxa %%g0, [%0] %1\n\t" | |
741 | "membar #Sync" | |
742 | : : "r" (TLB_TAG_ACCESS), "i" (ASI_DMMU)); | |
743 | if (tlb_type == spitfire) | |
744 | spitfire_put_dtlb_data(prom_dtlb[i].tlb_ent, 0x0UL); | |
745 | else | |
746 | cheetah_put_ldtlb_data(prom_dtlb[i].tlb_ent, 0x0UL); | |
747 | } | |
748 | if (prom_itlb[i].tlb_ent != -1) { | |
749 | __asm__ __volatile__("stxa %%g0, [%0] %1\n\t" | |
750 | "membar #Sync" | |
751 | : : "r" (TLB_TAG_ACCESS), | |
752 | "i" (ASI_IMMU)); | |
753 | if (tlb_type == spitfire) | |
754 | spitfire_put_itlb_data(prom_itlb[i].tlb_ent, 0x0UL); | |
755 | else | |
756 | cheetah_put_litlb_data(prom_itlb[i].tlb_ent, 0x0UL); | |
757 | } | |
758 | } | |
759 | } | |
760 | __asm__ __volatile__("wrpr %0, 0, %%pstate" | |
761 | : : "r" (pstate)); | |
762 | } | |
763 | ||
764 | void inherit_locked_prom_mappings(int save_p) | |
765 | { | |
766 | int i; | |
767 | int dtlb_seen = 0; | |
768 | int itlb_seen = 0; | |
769 | ||
770 | /* Fucking losing PROM has more mappings in the TLB, but | |
771 | * it (conveniently) fails to mention any of these in the | |
772 | * translations property. The only ones that matter are | |
773 | * the locked PROM tlb entries, so we impose the following | |
774 | * irrecovable rule on the PROM, it is allowed 8 locked | |
775 | * entries in the ITLB and 8 in the DTLB. | |
776 | * | |
777 | * Supposedly the upper 16GB of the address space is | |
778 | * reserved for OBP, BUT I WISH THIS WAS DOCUMENTED | |
779 | * SOMEWHERE!!!!!!!!!!!!!!!!! Furthermore the entire interface | |
780 | * used between the client program and the firmware on sun5 | |
781 | * systems to coordinate mmu mappings is also COMPLETELY | |
782 | * UNDOCUMENTED!!!!!! Thanks S(t)un! | |
783 | */ | |
784 | if (save_p) { | |
785 | for (i = 0; i < 16; i++) { | |
786 | prom_itlb[i].tlb_ent = -1; | |
787 | prom_dtlb[i].tlb_ent = -1; | |
788 | } | |
789 | } | |
790 | if (tlb_type == spitfire) { | |
791 | int high = SPITFIRE_HIGHEST_LOCKED_TLBENT - bigkernel; | |
792 | for (i = 0; i < high; i++) { | |
793 | unsigned long data; | |
794 | ||
795 | /* Spitfire Errata #32 workaround */ | |
796 | /* NOTE: Always runs on spitfire, so no cheetah+ | |
797 | * page size encodings. | |
798 | */ | |
799 | __asm__ __volatile__("stxa %0, [%1] %2\n\t" | |
800 | "flush %%g6" | |
801 | : /* No outputs */ | |
802 | : "r" (0), | |
803 | "r" (PRIMARY_CONTEXT), "i" (ASI_DMMU)); | |
804 | ||
805 | data = spitfire_get_dtlb_data(i); | |
806 | if ((data & (_PAGE_L|_PAGE_VALID)) == (_PAGE_L|_PAGE_VALID)) { | |
807 | unsigned long tag; | |
808 | ||
809 | /* Spitfire Errata #32 workaround */ | |
810 | /* NOTE: Always runs on spitfire, so no | |
811 | * cheetah+ page size encodings. | |
812 | */ | |
813 | __asm__ __volatile__("stxa %0, [%1] %2\n\t" | |
814 | "flush %%g6" | |
815 | : /* No outputs */ | |
816 | : "r" (0), | |
817 | "r" (PRIMARY_CONTEXT), "i" (ASI_DMMU)); | |
818 | ||
819 | tag = spitfire_get_dtlb_tag(i); | |
820 | if (save_p) { | |
821 | prom_dtlb[dtlb_seen].tlb_ent = i; | |
822 | prom_dtlb[dtlb_seen].tlb_tag = tag; | |
823 | prom_dtlb[dtlb_seen].tlb_data = data; | |
824 | } | |
825 | __asm__ __volatile__("stxa %%g0, [%0] %1\n\t" | |
826 | "membar #Sync" | |
827 | : : "r" (TLB_TAG_ACCESS), "i" (ASI_DMMU)); | |
828 | spitfire_put_dtlb_data(i, 0x0UL); | |
829 | ||
830 | dtlb_seen++; | |
831 | if (dtlb_seen > 15) | |
832 | break; | |
833 | } | |
834 | } | |
835 | ||
836 | for (i = 0; i < high; i++) { | |
837 | unsigned long data; | |
838 | ||
839 | /* Spitfire Errata #32 workaround */ | |
840 | /* NOTE: Always runs on spitfire, so no | |
841 | * cheetah+ page size encodings. | |
842 | */ | |
843 | __asm__ __volatile__("stxa %0, [%1] %2\n\t" | |
844 | "flush %%g6" | |
845 | : /* No outputs */ | |
846 | : "r" (0), | |
847 | "r" (PRIMARY_CONTEXT), "i" (ASI_DMMU)); | |
848 | ||
849 | data = spitfire_get_itlb_data(i); | |
850 | if ((data & (_PAGE_L|_PAGE_VALID)) == (_PAGE_L|_PAGE_VALID)) { | |
851 | unsigned long tag; | |
852 | ||
853 | /* Spitfire Errata #32 workaround */ | |
854 | /* NOTE: Always runs on spitfire, so no | |
855 | * cheetah+ page size encodings. | |
856 | */ | |
857 | __asm__ __volatile__("stxa %0, [%1] %2\n\t" | |
858 | "flush %%g6" | |
859 | : /* No outputs */ | |
860 | : "r" (0), | |
861 | "r" (PRIMARY_CONTEXT), "i" (ASI_DMMU)); | |
862 | ||
863 | tag = spitfire_get_itlb_tag(i); | |
864 | if (save_p) { | |
865 | prom_itlb[itlb_seen].tlb_ent = i; | |
866 | prom_itlb[itlb_seen].tlb_tag = tag; | |
867 | prom_itlb[itlb_seen].tlb_data = data; | |
868 | } | |
869 | __asm__ __volatile__("stxa %%g0, [%0] %1\n\t" | |
870 | "membar #Sync" | |
871 | : : "r" (TLB_TAG_ACCESS), "i" (ASI_IMMU)); | |
872 | spitfire_put_itlb_data(i, 0x0UL); | |
873 | ||
874 | itlb_seen++; | |
875 | if (itlb_seen > 15) | |
876 | break; | |
877 | } | |
878 | } | |
879 | } else if (tlb_type == cheetah || tlb_type == cheetah_plus) { | |
880 | int high = CHEETAH_HIGHEST_LOCKED_TLBENT - bigkernel; | |
881 | ||
882 | for (i = 0; i < high; i++) { | |
883 | unsigned long data; | |
884 | ||
885 | data = cheetah_get_ldtlb_data(i); | |
886 | if ((data & (_PAGE_L|_PAGE_VALID)) == (_PAGE_L|_PAGE_VALID)) { | |
887 | unsigned long tag; | |
888 | ||
889 | tag = cheetah_get_ldtlb_tag(i); | |
890 | if (save_p) { | |
891 | prom_dtlb[dtlb_seen].tlb_ent = i; | |
892 | prom_dtlb[dtlb_seen].tlb_tag = tag; | |
893 | prom_dtlb[dtlb_seen].tlb_data = data; | |
894 | } | |
895 | __asm__ __volatile__("stxa %%g0, [%0] %1\n\t" | |
896 | "membar #Sync" | |
897 | : : "r" (TLB_TAG_ACCESS), "i" (ASI_DMMU)); | |
898 | cheetah_put_ldtlb_data(i, 0x0UL); | |
899 | ||
900 | dtlb_seen++; | |
901 | if (dtlb_seen > 15) | |
902 | break; | |
903 | } | |
904 | } | |
905 | ||
906 | for (i = 0; i < high; i++) { | |
907 | unsigned long data; | |
908 | ||
909 | data = cheetah_get_litlb_data(i); | |
910 | if ((data & (_PAGE_L|_PAGE_VALID)) == (_PAGE_L|_PAGE_VALID)) { | |
911 | unsigned long tag; | |
912 | ||
913 | tag = cheetah_get_litlb_tag(i); | |
914 | if (save_p) { | |
915 | prom_itlb[itlb_seen].tlb_ent = i; | |
916 | prom_itlb[itlb_seen].tlb_tag = tag; | |
917 | prom_itlb[itlb_seen].tlb_data = data; | |
918 | } | |
919 | __asm__ __volatile__("stxa %%g0, [%0] %1\n\t" | |
920 | "membar #Sync" | |
921 | : : "r" (TLB_TAG_ACCESS), "i" (ASI_IMMU)); | |
922 | cheetah_put_litlb_data(i, 0x0UL); | |
923 | ||
924 | itlb_seen++; | |
925 | if (itlb_seen > 15) | |
926 | break; | |
927 | } | |
928 | } | |
929 | } else { | |
930 | /* Implement me :-) */ | |
931 | BUG(); | |
932 | } | |
933 | if (save_p) | |
934 | prom_ditlb_set = 1; | |
935 | } | |
936 | ||
937 | /* Give PROM back his world, done during reboots... */ | |
938 | void prom_reload_locked(void) | |
939 | { | |
940 | int i; | |
941 | ||
942 | for (i = 0; i < 16; i++) { | |
943 | if (prom_dtlb[i].tlb_ent != -1) { | |
944 | __asm__ __volatile__("stxa %0, [%1] %2\n\t" | |
945 | "membar #Sync" | |
946 | : : "r" (prom_dtlb[i].tlb_tag), "r" (TLB_TAG_ACCESS), | |
947 | "i" (ASI_DMMU)); | |
948 | if (tlb_type == spitfire) | |
949 | spitfire_put_dtlb_data(prom_dtlb[i].tlb_ent, | |
950 | prom_dtlb[i].tlb_data); | |
951 | else if (tlb_type == cheetah || tlb_type == cheetah_plus) | |
952 | cheetah_put_ldtlb_data(prom_dtlb[i].tlb_ent, | |
953 | prom_dtlb[i].tlb_data); | |
954 | } | |
955 | ||
956 | if (prom_itlb[i].tlb_ent != -1) { | |
957 | __asm__ __volatile__("stxa %0, [%1] %2\n\t" | |
958 | "membar #Sync" | |
959 | : : "r" (prom_itlb[i].tlb_tag), | |
960 | "r" (TLB_TAG_ACCESS), | |
961 | "i" (ASI_IMMU)); | |
962 | if (tlb_type == spitfire) | |
963 | spitfire_put_itlb_data(prom_itlb[i].tlb_ent, | |
964 | prom_itlb[i].tlb_data); | |
965 | else | |
966 | cheetah_put_litlb_data(prom_itlb[i].tlb_ent, | |
967 | prom_itlb[i].tlb_data); | |
968 | } | |
969 | } | |
970 | } | |
971 | ||
972 | #ifdef DCACHE_ALIASING_POSSIBLE | |
973 | void __flush_dcache_range(unsigned long start, unsigned long end) | |
974 | { | |
975 | unsigned long va; | |
976 | ||
977 | if (tlb_type == spitfire) { | |
978 | int n = 0; | |
979 | ||
980 | for (va = start; va < end; va += 32) { | |
981 | spitfire_put_dcache_tag(va & 0x3fe0, 0x0); | |
982 | if (++n >= 512) | |
983 | break; | |
984 | } | |
985 | } else { | |
986 | start = __pa(start); | |
987 | end = __pa(end); | |
988 | for (va = start; va < end; va += 32) | |
989 | __asm__ __volatile__("stxa %%g0, [%0] %1\n\t" | |
990 | "membar #Sync" | |
991 | : /* no outputs */ | |
992 | : "r" (va), | |
993 | "i" (ASI_DCACHE_INVALIDATE)); | |
994 | } | |
995 | } | |
996 | #endif /* DCACHE_ALIASING_POSSIBLE */ | |
997 | ||
998 | /* If not locked, zap it. */ | |
999 | void __flush_tlb_all(void) | |
1000 | { | |
1001 | unsigned long pstate; | |
1002 | int i; | |
1003 | ||
1004 | __asm__ __volatile__("flushw\n\t" | |
1005 | "rdpr %%pstate, %0\n\t" | |
1006 | "wrpr %0, %1, %%pstate" | |
1007 | : "=r" (pstate) | |
1008 | : "i" (PSTATE_IE)); | |
1009 | if (tlb_type == spitfire) { | |
1010 | for (i = 0; i < 64; i++) { | |
1011 | /* Spitfire Errata #32 workaround */ | |
1012 | /* NOTE: Always runs on spitfire, so no | |
1013 | * cheetah+ page size encodings. | |
1014 | */ | |
1015 | __asm__ __volatile__("stxa %0, [%1] %2\n\t" | |
1016 | "flush %%g6" | |
1017 | : /* No outputs */ | |
1018 | : "r" (0), | |
1019 | "r" (PRIMARY_CONTEXT), "i" (ASI_DMMU)); | |
1020 | ||
1021 | if (!(spitfire_get_dtlb_data(i) & _PAGE_L)) { | |
1022 | __asm__ __volatile__("stxa %%g0, [%0] %1\n\t" | |
1023 | "membar #Sync" | |
1024 | : /* no outputs */ | |
1025 | : "r" (TLB_TAG_ACCESS), "i" (ASI_DMMU)); | |
1026 | spitfire_put_dtlb_data(i, 0x0UL); | |
1027 | } | |
1028 | ||
1029 | /* Spitfire Errata #32 workaround */ | |
1030 | /* NOTE: Always runs on spitfire, so no | |
1031 | * cheetah+ page size encodings. | |
1032 | */ | |
1033 | __asm__ __volatile__("stxa %0, [%1] %2\n\t" | |
1034 | "flush %%g6" | |
1035 | : /* No outputs */ | |
1036 | : "r" (0), | |
1037 | "r" (PRIMARY_CONTEXT), "i" (ASI_DMMU)); | |
1038 | ||
1039 | if (!(spitfire_get_itlb_data(i) & _PAGE_L)) { | |
1040 | __asm__ __volatile__("stxa %%g0, [%0] %1\n\t" | |
1041 | "membar #Sync" | |
1042 | : /* no outputs */ | |
1043 | : "r" (TLB_TAG_ACCESS), "i" (ASI_IMMU)); | |
1044 | spitfire_put_itlb_data(i, 0x0UL); | |
1045 | } | |
1046 | } | |
1047 | } else if (tlb_type == cheetah || tlb_type == cheetah_plus) { | |
1048 | cheetah_flush_dtlb_all(); | |
1049 | cheetah_flush_itlb_all(); | |
1050 | } | |
1051 | __asm__ __volatile__("wrpr %0, 0, %%pstate" | |
1052 | : : "r" (pstate)); | |
1053 | } | |
1054 | ||
1055 | /* Caller does TLB context flushing on local CPU if necessary. | |
1056 | * The caller also ensures that CTX_VALID(mm->context) is false. | |
1057 | * | |
1058 | * We must be careful about boundary cases so that we never | |
1059 | * let the user have CTX 0 (nucleus) or we ever use a CTX | |
1060 | * version of zero (and thus NO_CONTEXT would not be caught | |
1061 | * by version mis-match tests in mmu_context.h). | |
1062 | */ | |
1063 | void get_new_mmu_context(struct mm_struct *mm) | |
1064 | { | |
1065 | unsigned long ctx, new_ctx; | |
1066 | unsigned long orig_pgsz_bits; | |
1067 | ||
1068 | ||
1069 | spin_lock(&ctx_alloc_lock); | |
1070 | orig_pgsz_bits = (mm->context.sparc64_ctx_val & CTX_PGSZ_MASK); | |
1071 | ctx = (tlb_context_cache + 1) & CTX_NR_MASK; | |
1072 | new_ctx = find_next_zero_bit(mmu_context_bmap, 1 << CTX_NR_BITS, ctx); | |
1073 | if (new_ctx >= (1 << CTX_NR_BITS)) { | |
1074 | new_ctx = find_next_zero_bit(mmu_context_bmap, ctx, 1); | |
1075 | if (new_ctx >= ctx) { | |
1076 | int i; | |
1077 | new_ctx = (tlb_context_cache & CTX_VERSION_MASK) + | |
1078 | CTX_FIRST_VERSION; | |
1079 | if (new_ctx == 1) | |
1080 | new_ctx = CTX_FIRST_VERSION; | |
1081 | ||
1082 | /* Don't call memset, for 16 entries that's just | |
1083 | * plain silly... | |
1084 | */ | |
1085 | mmu_context_bmap[0] = 3; | |
1086 | mmu_context_bmap[1] = 0; | |
1087 | mmu_context_bmap[2] = 0; | |
1088 | mmu_context_bmap[3] = 0; | |
1089 | for (i = 4; i < CTX_BMAP_SLOTS; i += 4) { | |
1090 | mmu_context_bmap[i + 0] = 0; | |
1091 | mmu_context_bmap[i + 1] = 0; | |
1092 | mmu_context_bmap[i + 2] = 0; | |
1093 | mmu_context_bmap[i + 3] = 0; | |
1094 | } | |
1095 | goto out; | |
1096 | } | |
1097 | } | |
1098 | mmu_context_bmap[new_ctx>>6] |= (1UL << (new_ctx & 63)); | |
1099 | new_ctx |= (tlb_context_cache & CTX_VERSION_MASK); | |
1100 | out: | |
1101 | tlb_context_cache = new_ctx; | |
1102 | mm->context.sparc64_ctx_val = new_ctx | orig_pgsz_bits; | |
1103 | spin_unlock(&ctx_alloc_lock); | |
1104 | } | |
1105 | ||
1106 | #ifndef CONFIG_SMP | |
1107 | struct pgtable_cache_struct pgt_quicklists; | |
1108 | #endif | |
1109 | ||
1110 | /* OK, we have to color these pages. The page tables are accessed | |
1111 | * by non-Dcache enabled mapping in the VPTE area by the dtlb_backend.S | |
1112 | * code, as well as by PAGE_OFFSET range direct-mapped addresses by | |
1113 | * other parts of the kernel. By coloring, we make sure that the tlbmiss | |
1114 | * fast handlers do not get data from old/garbage dcache lines that | |
1115 | * correspond to an old/stale virtual address (user/kernel) that | |
1116 | * previously mapped the pagetable page while accessing vpte range | |
1117 | * addresses. The idea is that if the vpte color and PAGE_OFFSET range | |
1118 | * color is the same, then when the kernel initializes the pagetable | |
1119 | * using the later address range, accesses with the first address | |
1120 | * range will see the newly initialized data rather than the garbage. | |
1121 | */ | |
1122 | #ifdef DCACHE_ALIASING_POSSIBLE | |
1123 | #define DC_ALIAS_SHIFT 1 | |
1124 | #else | |
1125 | #define DC_ALIAS_SHIFT 0 | |
1126 | #endif | |
8edf72eb | 1127 | pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address) |
1da177e4 LT |
1128 | { |
1129 | struct page *page; | |
1130 | unsigned long color; | |
1131 | ||
1132 | { | |
1133 | pte_t *ptep = pte_alloc_one_fast(mm, address); | |
1134 | ||
1135 | if (ptep) | |
1136 | return ptep; | |
1137 | } | |
1138 | ||
1139 | color = VPTE_COLOR(address); | |
1140 | page = alloc_pages(GFP_KERNEL|__GFP_REPEAT, DC_ALIAS_SHIFT); | |
1141 | if (page) { | |
1142 | unsigned long *to_free; | |
1143 | unsigned long paddr; | |
1144 | pte_t *pte; | |
1145 | ||
1146 | #ifdef DCACHE_ALIASING_POSSIBLE | |
1147 | set_page_count(page, 1); | |
1148 | ClearPageCompound(page); | |
1149 | ||
1150 | set_page_count((page + 1), 1); | |
1151 | ClearPageCompound(page + 1); | |
1152 | #endif | |
1153 | paddr = (unsigned long) page_address(page); | |
1154 | memset((char *)paddr, 0, (PAGE_SIZE << DC_ALIAS_SHIFT)); | |
1155 | ||
1156 | if (!color) { | |
1157 | pte = (pte_t *) paddr; | |
1158 | to_free = (unsigned long *) (paddr + PAGE_SIZE); | |
1159 | } else { | |
1160 | pte = (pte_t *) (paddr + PAGE_SIZE); | |
1161 | to_free = (unsigned long *) paddr; | |
1162 | } | |
1163 | ||
1164 | #ifdef DCACHE_ALIASING_POSSIBLE | |
1165 | /* Now free the other one up, adjust cache size. */ | |
1166 | preempt_disable(); | |
1167 | *to_free = (unsigned long) pte_quicklist[color ^ 0x1]; | |
1168 | pte_quicklist[color ^ 0x1] = to_free; | |
1169 | pgtable_cache_size++; | |
1170 | preempt_enable(); | |
1171 | #endif | |
1172 | ||
1173 | return pte; | |
1174 | } | |
1175 | return NULL; | |
1176 | } | |
1177 | ||
1178 | void sparc_ultra_dump_itlb(void) | |
1179 | { | |
1180 | int slot; | |
1181 | ||
1182 | if (tlb_type == spitfire) { | |
1183 | printk ("Contents of itlb: "); | |
1184 | for (slot = 0; slot < 14; slot++) printk (" "); | |
1185 | printk ("%2x:%016lx,%016lx\n", | |
1186 | 0, | |
1187 | spitfire_get_itlb_tag(0), spitfire_get_itlb_data(0)); | |
1188 | for (slot = 1; slot < 64; slot+=3) { | |
1189 | printk ("%2x:%016lx,%016lx %2x:%016lx,%016lx %2x:%016lx,%016lx\n", | |
1190 | slot, | |
1191 | spitfire_get_itlb_tag(slot), spitfire_get_itlb_data(slot), | |
1192 | slot+1, | |
1193 | spitfire_get_itlb_tag(slot+1), spitfire_get_itlb_data(slot+1), | |
1194 | slot+2, | |
1195 | spitfire_get_itlb_tag(slot+2), spitfire_get_itlb_data(slot+2)); | |
1196 | } | |
1197 | } else if (tlb_type == cheetah || tlb_type == cheetah_plus) { | |
1198 | printk ("Contents of itlb0:\n"); | |
1199 | for (slot = 0; slot < 16; slot+=2) { | |
1200 | printk ("%2x:%016lx,%016lx %2x:%016lx,%016lx\n", | |
1201 | slot, | |
1202 | cheetah_get_litlb_tag(slot), cheetah_get_litlb_data(slot), | |
1203 | slot+1, | |
1204 | cheetah_get_litlb_tag(slot+1), cheetah_get_litlb_data(slot+1)); | |
1205 | } | |
1206 | printk ("Contents of itlb2:\n"); | |
1207 | for (slot = 0; slot < 128; slot+=2) { | |
1208 | printk ("%2x:%016lx,%016lx %2x:%016lx,%016lx\n", | |
1209 | slot, | |
1210 | cheetah_get_itlb_tag(slot), cheetah_get_itlb_data(slot), | |
1211 | slot+1, | |
1212 | cheetah_get_itlb_tag(slot+1), cheetah_get_itlb_data(slot+1)); | |
1213 | } | |
1214 | } | |
1215 | } | |
1216 | ||
1217 | void sparc_ultra_dump_dtlb(void) | |
1218 | { | |
1219 | int slot; | |
1220 | ||
1221 | if (tlb_type == spitfire) { | |
1222 | printk ("Contents of dtlb: "); | |
1223 | for (slot = 0; slot < 14; slot++) printk (" "); | |
1224 | printk ("%2x:%016lx,%016lx\n", 0, | |
1225 | spitfire_get_dtlb_tag(0), spitfire_get_dtlb_data(0)); | |
1226 | for (slot = 1; slot < 64; slot+=3) { | |
1227 | printk ("%2x:%016lx,%016lx %2x:%016lx,%016lx %2x:%016lx,%016lx\n", | |
1228 | slot, | |
1229 | spitfire_get_dtlb_tag(slot), spitfire_get_dtlb_data(slot), | |
1230 | slot+1, | |
1231 | spitfire_get_dtlb_tag(slot+1), spitfire_get_dtlb_data(slot+1), | |
1232 | slot+2, | |
1233 | spitfire_get_dtlb_tag(slot+2), spitfire_get_dtlb_data(slot+2)); | |
1234 | } | |
1235 | } else if (tlb_type == cheetah || tlb_type == cheetah_plus) { | |
1236 | printk ("Contents of dtlb0:\n"); | |
1237 | for (slot = 0; slot < 16; slot+=2) { | |
1238 | printk ("%2x:%016lx,%016lx %2x:%016lx,%016lx\n", | |
1239 | slot, | |
1240 | cheetah_get_ldtlb_tag(slot), cheetah_get_ldtlb_data(slot), | |
1241 | slot+1, | |
1242 | cheetah_get_ldtlb_tag(slot+1), cheetah_get_ldtlb_data(slot+1)); | |
1243 | } | |
1244 | printk ("Contents of dtlb2:\n"); | |
1245 | for (slot = 0; slot < 512; slot+=2) { | |
1246 | printk ("%2x:%016lx,%016lx %2x:%016lx,%016lx\n", | |
1247 | slot, | |
1248 | cheetah_get_dtlb_tag(slot, 2), cheetah_get_dtlb_data(slot, 2), | |
1249 | slot+1, | |
1250 | cheetah_get_dtlb_tag(slot+1, 2), cheetah_get_dtlb_data(slot+1, 2)); | |
1251 | } | |
1252 | if (tlb_type == cheetah_plus) { | |
1253 | printk ("Contents of dtlb3:\n"); | |
1254 | for (slot = 0; slot < 512; slot+=2) { | |
1255 | printk ("%2x:%016lx,%016lx %2x:%016lx,%016lx\n", | |
1256 | slot, | |
1257 | cheetah_get_dtlb_tag(slot, 3), cheetah_get_dtlb_data(slot, 3), | |
1258 | slot+1, | |
1259 | cheetah_get_dtlb_tag(slot+1, 3), cheetah_get_dtlb_data(slot+1, 3)); | |
1260 | } | |
1261 | } | |
1262 | } | |
1263 | } | |
1264 | ||
1265 | extern unsigned long cmdline_memory_size; | |
1266 | ||
1267 | unsigned long __init bootmem_init(unsigned long *pages_avail) | |
1268 | { | |
1269 | unsigned long bootmap_size, start_pfn, end_pfn; | |
1270 | unsigned long end_of_phys_memory = 0UL; | |
1271 | unsigned long bootmap_pfn, bytes_avail, size; | |
1272 | int i; | |
1273 | ||
1274 | #ifdef CONFIG_DEBUG_BOOTMEM | |
1275 | prom_printf("bootmem_init: Scan sp_banks, "); | |
1276 | #endif | |
1277 | ||
1278 | bytes_avail = 0UL; | |
1279 | for (i = 0; sp_banks[i].num_bytes != 0; i++) { | |
1280 | end_of_phys_memory = sp_banks[i].base_addr + | |
1281 | sp_banks[i].num_bytes; | |
1282 | bytes_avail += sp_banks[i].num_bytes; | |
1283 | if (cmdline_memory_size) { | |
1284 | if (bytes_avail > cmdline_memory_size) { | |
1285 | unsigned long slack = bytes_avail - cmdline_memory_size; | |
1286 | ||
1287 | bytes_avail -= slack; | |
1288 | end_of_phys_memory -= slack; | |
1289 | ||
1290 | sp_banks[i].num_bytes -= slack; | |
1291 | if (sp_banks[i].num_bytes == 0) { | |
1292 | sp_banks[i].base_addr = 0xdeadbeef; | |
1293 | } else { | |
1294 | sp_banks[i+1].num_bytes = 0; | |
1295 | sp_banks[i+1].base_addr = 0xdeadbeef; | |
1296 | } | |
1297 | break; | |
1298 | } | |
1299 | } | |
1300 | } | |
1301 | ||
1302 | *pages_avail = bytes_avail >> PAGE_SHIFT; | |
1303 | ||
1304 | /* Start with page aligned address of last symbol in kernel | |
1305 | * image. The kernel is hard mapped below PAGE_OFFSET in a | |
1306 | * 4MB locked TLB translation. | |
1307 | */ | |
1308 | start_pfn = PAGE_ALIGN(kern_base + kern_size) >> PAGE_SHIFT; | |
1309 | ||
1310 | bootmap_pfn = start_pfn; | |
1311 | ||
1312 | end_pfn = end_of_phys_memory >> PAGE_SHIFT; | |
1313 | ||
1314 | #ifdef CONFIG_BLK_DEV_INITRD | |
1315 | /* Now have to check initial ramdisk, so that bootmap does not overwrite it */ | |
1316 | if (sparc_ramdisk_image || sparc_ramdisk_image64) { | |
1317 | unsigned long ramdisk_image = sparc_ramdisk_image ? | |
1318 | sparc_ramdisk_image : sparc_ramdisk_image64; | |
1319 | if (ramdisk_image >= (unsigned long)_end - 2 * PAGE_SIZE) | |
1320 | ramdisk_image -= KERNBASE; | |
1321 | initrd_start = ramdisk_image + phys_base; | |
1322 | initrd_end = initrd_start + sparc_ramdisk_size; | |
1323 | if (initrd_end > end_of_phys_memory) { | |
1324 | printk(KERN_CRIT "initrd extends beyond end of memory " | |
1325 | "(0x%016lx > 0x%016lx)\ndisabling initrd\n", | |
1326 | initrd_end, end_of_phys_memory); | |
1327 | initrd_start = 0; | |
1328 | } | |
1329 | if (initrd_start) { | |
1330 | if (initrd_start >= (start_pfn << PAGE_SHIFT) && | |
1331 | initrd_start < (start_pfn << PAGE_SHIFT) + 2 * PAGE_SIZE) | |
1332 | bootmap_pfn = PAGE_ALIGN (initrd_end) >> PAGE_SHIFT; | |
1333 | } | |
1334 | } | |
1335 | #endif | |
1336 | /* Initialize the boot-time allocator. */ | |
1337 | max_pfn = max_low_pfn = end_pfn; | |
1338 | min_low_pfn = pfn_base; | |
1339 | ||
1340 | #ifdef CONFIG_DEBUG_BOOTMEM | |
1341 | prom_printf("init_bootmem(min[%lx], bootmap[%lx], max[%lx])\n", | |
1342 | min_low_pfn, bootmap_pfn, max_low_pfn); | |
1343 | #endif | |
1344 | bootmap_size = init_bootmem_node(NODE_DATA(0), bootmap_pfn, pfn_base, end_pfn); | |
1345 | ||
1346 | bootmap_base = bootmap_pfn << PAGE_SHIFT; | |
1347 | ||
1348 | /* Now register the available physical memory with the | |
1349 | * allocator. | |
1350 | */ | |
1351 | for (i = 0; sp_banks[i].num_bytes != 0; i++) { | |
1352 | #ifdef CONFIG_DEBUG_BOOTMEM | |
1353 | prom_printf("free_bootmem(sp_banks:%d): base[%lx] size[%lx]\n", | |
1354 | i, sp_banks[i].base_addr, sp_banks[i].num_bytes); | |
1355 | #endif | |
1356 | free_bootmem(sp_banks[i].base_addr, sp_banks[i].num_bytes); | |
1357 | } | |
1358 | ||
1359 | #ifdef CONFIG_BLK_DEV_INITRD | |
1360 | if (initrd_start) { | |
1361 | size = initrd_end - initrd_start; | |
1362 | ||
1363 | /* Resert the initrd image area. */ | |
1364 | #ifdef CONFIG_DEBUG_BOOTMEM | |
1365 | prom_printf("reserve_bootmem(initrd): base[%llx] size[%lx]\n", | |
1366 | initrd_start, initrd_end); | |
1367 | #endif | |
1368 | reserve_bootmem(initrd_start, size); | |
1369 | *pages_avail -= PAGE_ALIGN(size) >> PAGE_SHIFT; | |
1370 | ||
1371 | initrd_start += PAGE_OFFSET; | |
1372 | initrd_end += PAGE_OFFSET; | |
1373 | } | |
1374 | #endif | |
1375 | /* Reserve the kernel text/data/bss. */ | |
1376 | #ifdef CONFIG_DEBUG_BOOTMEM | |
1377 | prom_printf("reserve_bootmem(kernel): base[%lx] size[%lx]\n", kern_base, kern_size); | |
1378 | #endif | |
1379 | reserve_bootmem(kern_base, kern_size); | |
1380 | *pages_avail -= PAGE_ALIGN(kern_size) >> PAGE_SHIFT; | |
1381 | ||
1382 | /* Reserve the bootmem map. We do not account for it | |
1383 | * in pages_avail because we will release that memory | |
1384 | * in free_all_bootmem. | |
1385 | */ | |
1386 | size = bootmap_size; | |
1387 | #ifdef CONFIG_DEBUG_BOOTMEM | |
1388 | prom_printf("reserve_bootmem(bootmap): base[%lx] size[%lx]\n", | |
1389 | (bootmap_pfn << PAGE_SHIFT), size); | |
1390 | #endif | |
1391 | reserve_bootmem((bootmap_pfn << PAGE_SHIFT), size); | |
1392 | *pages_avail -= PAGE_ALIGN(size) >> PAGE_SHIFT; | |
1393 | ||
1394 | return end_pfn; | |
1395 | } | |
1396 | ||
1397 | /* paging_init() sets up the page tables */ | |
1398 | ||
1399 | extern void cheetah_ecache_flush_init(void); | |
1400 | ||
1401 | static unsigned long last_valid_pfn; | |
1402 | ||
1403 | void __init paging_init(void) | |
1404 | { | |
1405 | extern pmd_t swapper_pmd_dir[1024]; | |
1da177e4 LT |
1406 | unsigned long alias_base = kern_base + PAGE_OFFSET; |
1407 | unsigned long second_alias_page = 0; | |
1408 | unsigned long pt, flags, end_pfn, pages_avail; | |
1409 | unsigned long shift = alias_base - ((unsigned long)KERNBASE); | |
1410 | unsigned long real_end; | |
1411 | ||
1412 | set_bit(0, mmu_context_bmap); | |
1413 | ||
1414 | real_end = (unsigned long)_end; | |
1415 | if ((real_end > ((unsigned long)KERNBASE + 0x400000))) | |
1416 | bigkernel = 1; | |
1417 | #ifdef CONFIG_BLK_DEV_INITRD | |
1418 | if (sparc_ramdisk_image || sparc_ramdisk_image64) | |
1419 | real_end = (PAGE_ALIGN(real_end) + PAGE_ALIGN(sparc_ramdisk_size)); | |
1420 | #endif | |
1421 | ||
1422 | /* We assume physical memory starts at some 4mb multiple, | |
1423 | * if this were not true we wouldn't boot up to this point | |
1424 | * anyways. | |
1425 | */ | |
1426 | pt = kern_base | _PAGE_VALID | _PAGE_SZ4MB; | |
1427 | pt |= _PAGE_CP | _PAGE_CV | _PAGE_P | _PAGE_L | _PAGE_W; | |
1428 | local_irq_save(flags); | |
1429 | if (tlb_type == spitfire) { | |
1430 | __asm__ __volatile__( | |
1431 | " stxa %1, [%0] %3\n" | |
1432 | " stxa %2, [%5] %4\n" | |
1433 | " membar #Sync\n" | |
1434 | " flush %%g6\n" | |
1435 | " nop\n" | |
1436 | " nop\n" | |
1437 | " nop\n" | |
1438 | : /* No outputs */ | |
1439 | : "r" (TLB_TAG_ACCESS), "r" (alias_base), "r" (pt), | |
1440 | "i" (ASI_DMMU), "i" (ASI_DTLB_DATA_ACCESS), "r" (61 << 3) | |
1441 | : "memory"); | |
1442 | if (real_end >= KERNBASE + 0x340000) { | |
1443 | second_alias_page = alias_base + 0x400000; | |
1444 | __asm__ __volatile__( | |
1445 | " stxa %1, [%0] %3\n" | |
1446 | " stxa %2, [%5] %4\n" | |
1447 | " membar #Sync\n" | |
1448 | " flush %%g6\n" | |
1449 | " nop\n" | |
1450 | " nop\n" | |
1451 | " nop\n" | |
1452 | : /* No outputs */ | |
1453 | : "r" (TLB_TAG_ACCESS), "r" (second_alias_page), "r" (pt + 0x400000), | |
1454 | "i" (ASI_DMMU), "i" (ASI_DTLB_DATA_ACCESS), "r" (60 << 3) | |
1455 | : "memory"); | |
1456 | } | |
1457 | } else if (tlb_type == cheetah || tlb_type == cheetah_plus) { | |
1458 | __asm__ __volatile__( | |
1459 | " stxa %1, [%0] %3\n" | |
1460 | " stxa %2, [%5] %4\n" | |
1461 | " membar #Sync\n" | |
1462 | " flush %%g6\n" | |
1463 | " nop\n" | |
1464 | " nop\n" | |
1465 | " nop\n" | |
1466 | : /* No outputs */ | |
1467 | : "r" (TLB_TAG_ACCESS), "r" (alias_base), "r" (pt), | |
1468 | "i" (ASI_DMMU), "i" (ASI_DTLB_DATA_ACCESS), "r" ((0<<16) | (13<<3)) | |
1469 | : "memory"); | |
1470 | if (real_end >= KERNBASE + 0x340000) { | |
1471 | second_alias_page = alias_base + 0x400000; | |
1472 | __asm__ __volatile__( | |
1473 | " stxa %1, [%0] %3\n" | |
1474 | " stxa %2, [%5] %4\n" | |
1475 | " membar #Sync\n" | |
1476 | " flush %%g6\n" | |
1477 | " nop\n" | |
1478 | " nop\n" | |
1479 | " nop\n" | |
1480 | : /* No outputs */ | |
1481 | : "r" (TLB_TAG_ACCESS), "r" (second_alias_page), "r" (pt + 0x400000), | |
1482 | "i" (ASI_DMMU), "i" (ASI_DTLB_DATA_ACCESS), "r" ((0<<16) | (12<<3)) | |
1483 | : "memory"); | |
1484 | } | |
1485 | } | |
1486 | local_irq_restore(flags); | |
1487 | ||
1488 | /* Now set kernel pgd to upper alias so physical page computations | |
1489 | * work. | |
1490 | */ | |
1491 | init_mm.pgd += ((shift) / (sizeof(pgd_t))); | |
1492 | ||
1493 | memset(swapper_pmd_dir, 0, sizeof(swapper_pmd_dir)); | |
1494 | ||
1495 | /* Now can init the kernel/bad page tables. */ | |
1496 | pud_set(pud_offset(&swapper_pg_dir[0], 0), | |
1497 | swapper_pmd_dir + (shift / sizeof(pgd_t))); | |
1498 | ||
1ac4f5eb | 1499 | swapper_pgd_zero = pgd_val(init_mm.pgd[0]); |
1da177e4 LT |
1500 | |
1501 | /* Setup bootmem... */ | |
1502 | pages_avail = 0; | |
1503 | last_valid_pfn = end_pfn = bootmem_init(&pages_avail); | |
1504 | ||
1505 | /* Inherit non-locked OBP mappings. */ | |
1506 | inherit_prom_mappings(); | |
1507 | ||
1508 | /* Ok, we can use our TLB miss and window trap handlers safely. | |
1509 | * We need to do a quick peek here to see if we are on StarFire | |
1510 | * or not, so setup_tba can setup the IRQ globals correctly (it | |
1511 | * needs to get the hard smp processor id correctly). | |
1512 | */ | |
1513 | { | |
1514 | extern void setup_tba(int); | |
1515 | setup_tba(this_is_starfire); | |
1516 | } | |
1517 | ||
1518 | inherit_locked_prom_mappings(1); | |
1519 | ||
1520 | /* We only created DTLB mapping of this stuff. */ | |
1521 | spitfire_flush_dtlb_nucleus_page(alias_base); | |
1522 | if (second_alias_page) | |
1523 | spitfire_flush_dtlb_nucleus_page(second_alias_page); | |
1524 | ||
1525 | __flush_tlb_all(); | |
1526 | ||
1527 | { | |
1528 | unsigned long zones_size[MAX_NR_ZONES]; | |
1529 | unsigned long zholes_size[MAX_NR_ZONES]; | |
1530 | unsigned long npages; | |
1531 | int znum; | |
1532 | ||
1533 | for (znum = 0; znum < MAX_NR_ZONES; znum++) | |
1534 | zones_size[znum] = zholes_size[znum] = 0; | |
1535 | ||
1536 | npages = end_pfn - pfn_base; | |
1537 | zones_size[ZONE_DMA] = npages; | |
1538 | zholes_size[ZONE_DMA] = npages - pages_avail; | |
1539 | ||
1540 | free_area_init_node(0, &contig_page_data, zones_size, | |
1541 | phys_base >> PAGE_SHIFT, zholes_size); | |
1542 | } | |
1543 | ||
1544 | device_scan(); | |
1545 | } | |
1546 | ||
1547 | /* Ok, it seems that the prom can allocate some more memory chunks | |
1548 | * as a side effect of some prom calls we perform during the | |
1549 | * boot sequence. My most likely theory is that it is from the | |
1550 | * prom_set_traptable() call, and OBP is allocating a scratchpad | |
1551 | * for saving client program register state etc. | |
1552 | */ | |
1553 | static void __init sort_memlist(struct linux_mlist_p1275 *thislist) | |
1554 | { | |
1555 | int swapi = 0; | |
1556 | int i, mitr; | |
1557 | unsigned long tmpaddr, tmpsize; | |
1558 | unsigned long lowest; | |
1559 | ||
1560 | for (i = 0; thislist[i].theres_more != 0; i++) { | |
1561 | lowest = thislist[i].start_adr; | |
1562 | for (mitr = i+1; thislist[mitr-1].theres_more != 0; mitr++) | |
1563 | if (thislist[mitr].start_adr < lowest) { | |
1564 | lowest = thislist[mitr].start_adr; | |
1565 | swapi = mitr; | |
1566 | } | |
1567 | if (lowest == thislist[i].start_adr) | |
1568 | continue; | |
1569 | tmpaddr = thislist[swapi].start_adr; | |
1570 | tmpsize = thislist[swapi].num_bytes; | |
1571 | for (mitr = swapi; mitr > i; mitr--) { | |
1572 | thislist[mitr].start_adr = thislist[mitr-1].start_adr; | |
1573 | thislist[mitr].num_bytes = thislist[mitr-1].num_bytes; | |
1574 | } | |
1575 | thislist[i].start_adr = tmpaddr; | |
1576 | thislist[i].num_bytes = tmpsize; | |
1577 | } | |
1578 | } | |
1579 | ||
1580 | void __init rescan_sp_banks(void) | |
1581 | { | |
1582 | struct linux_prom64_registers memlist[64]; | |
1583 | struct linux_mlist_p1275 avail[64], *mlist; | |
1584 | unsigned long bytes, base_paddr; | |
1585 | int num_regs, node = prom_finddevice("/memory"); | |
1586 | int i; | |
1587 | ||
1588 | num_regs = prom_getproperty(node, "available", | |
1589 | (char *) memlist, sizeof(memlist)); | |
1590 | num_regs = (num_regs / sizeof(struct linux_prom64_registers)); | |
1591 | for (i = 0; i < num_regs; i++) { | |
1592 | avail[i].start_adr = memlist[i].phys_addr; | |
1593 | avail[i].num_bytes = memlist[i].reg_size; | |
1594 | avail[i].theres_more = &avail[i + 1]; | |
1595 | } | |
1596 | avail[i - 1].theres_more = NULL; | |
1597 | sort_memlist(avail); | |
1598 | ||
1599 | mlist = &avail[0]; | |
1600 | i = 0; | |
1601 | bytes = mlist->num_bytes; | |
1602 | base_paddr = mlist->start_adr; | |
1603 | ||
1604 | sp_banks[0].base_addr = base_paddr; | |
1605 | sp_banks[0].num_bytes = bytes; | |
1606 | ||
1607 | while (mlist->theres_more != NULL){ | |
1608 | i++; | |
1609 | mlist = mlist->theres_more; | |
1610 | bytes = mlist->num_bytes; | |
1611 | if (i >= SPARC_PHYS_BANKS-1) { | |
1612 | printk ("The machine has more banks than " | |
1613 | "this kernel can support\n" | |
1614 | "Increase the SPARC_PHYS_BANKS " | |
1615 | "setting (currently %d)\n", | |
1616 | SPARC_PHYS_BANKS); | |
1617 | i = SPARC_PHYS_BANKS-1; | |
1618 | break; | |
1619 | } | |
1620 | ||
1621 | sp_banks[i].base_addr = mlist->start_adr; | |
1622 | sp_banks[i].num_bytes = mlist->num_bytes; | |
1623 | } | |
1624 | ||
1625 | i++; | |
1626 | sp_banks[i].base_addr = 0xdeadbeefbeefdeadUL; | |
1627 | sp_banks[i].num_bytes = 0; | |
1628 | ||
1629 | for (i = 0; sp_banks[i].num_bytes != 0; i++) | |
1630 | sp_banks[i].num_bytes &= PAGE_MASK; | |
1631 | } | |
1632 | ||
1633 | static void __init taint_real_pages(void) | |
1634 | { | |
1635 | struct sparc_phys_banks saved_sp_banks[SPARC_PHYS_BANKS]; | |
1636 | int i; | |
1637 | ||
1638 | for (i = 0; i < SPARC_PHYS_BANKS; i++) { | |
1639 | saved_sp_banks[i].base_addr = | |
1640 | sp_banks[i].base_addr; | |
1641 | saved_sp_banks[i].num_bytes = | |
1642 | sp_banks[i].num_bytes; | |
1643 | } | |
1644 | ||
1645 | rescan_sp_banks(); | |
1646 | ||
1647 | /* Find changes discovered in the sp_bank rescan and | |
1648 | * reserve the lost portions in the bootmem maps. | |
1649 | */ | |
1650 | for (i = 0; saved_sp_banks[i].num_bytes; i++) { | |
1651 | unsigned long old_start, old_end; | |
1652 | ||
1653 | old_start = saved_sp_banks[i].base_addr; | |
1654 | old_end = old_start + | |
1655 | saved_sp_banks[i].num_bytes; | |
1656 | while (old_start < old_end) { | |
1657 | int n; | |
1658 | ||
1659 | for (n = 0; sp_banks[n].num_bytes; n++) { | |
1660 | unsigned long new_start, new_end; | |
1661 | ||
1662 | new_start = sp_banks[n].base_addr; | |
1663 | new_end = new_start + sp_banks[n].num_bytes; | |
1664 | ||
1665 | if (new_start <= old_start && | |
1666 | new_end >= (old_start + PAGE_SIZE)) { | |
1667 | set_bit (old_start >> 22, | |
1668 | sparc64_valid_addr_bitmap); | |
1669 | goto do_next_page; | |
1670 | } | |
1671 | } | |
1672 | reserve_bootmem(old_start, PAGE_SIZE); | |
1673 | ||
1674 | do_next_page: | |
1675 | old_start += PAGE_SIZE; | |
1676 | } | |
1677 | } | |
1678 | } | |
1679 | ||
1680 | void __init mem_init(void) | |
1681 | { | |
1682 | unsigned long codepages, datapages, initpages; | |
1683 | unsigned long addr, last; | |
1684 | int i; | |
1685 | ||
1686 | i = last_valid_pfn >> ((22 - PAGE_SHIFT) + 6); | |
1687 | i += 1; | |
1688 | sparc64_valid_addr_bitmap = (unsigned long *) | |
1689 | __alloc_bootmem(i << 3, SMP_CACHE_BYTES, bootmap_base); | |
1690 | if (sparc64_valid_addr_bitmap == NULL) { | |
1691 | prom_printf("mem_init: Cannot alloc valid_addr_bitmap.\n"); | |
1692 | prom_halt(); | |
1693 | } | |
1694 | memset(sparc64_valid_addr_bitmap, 0, i << 3); | |
1695 | ||
1696 | addr = PAGE_OFFSET + kern_base; | |
1697 | last = PAGE_ALIGN(kern_size) + addr; | |
1698 | while (addr < last) { | |
1699 | set_bit(__pa(addr) >> 22, sparc64_valid_addr_bitmap); | |
1700 | addr += PAGE_SIZE; | |
1701 | } | |
1702 | ||
1703 | taint_real_pages(); | |
1704 | ||
1705 | max_mapnr = last_valid_pfn - pfn_base; | |
1706 | high_memory = __va(last_valid_pfn << PAGE_SHIFT); | |
1707 | ||
1708 | #ifdef CONFIG_DEBUG_BOOTMEM | |
1709 | prom_printf("mem_init: Calling free_all_bootmem().\n"); | |
1710 | #endif | |
1711 | totalram_pages = num_physpages = free_all_bootmem() - 1; | |
1712 | ||
1713 | /* | |
1714 | * Set up the zero page, mark it reserved, so that page count | |
1715 | * is not manipulated when freeing the page from user ptes. | |
1716 | */ | |
1717 | mem_map_zero = alloc_pages(GFP_KERNEL|__GFP_ZERO, 0); | |
1718 | if (mem_map_zero == NULL) { | |
1719 | prom_printf("paging_init: Cannot alloc zero page.\n"); | |
1720 | prom_halt(); | |
1721 | } | |
1722 | SetPageReserved(mem_map_zero); | |
1723 | ||
1724 | codepages = (((unsigned long) _etext) - ((unsigned long) _start)); | |
1725 | codepages = PAGE_ALIGN(codepages) >> PAGE_SHIFT; | |
1726 | datapages = (((unsigned long) _edata) - ((unsigned long) _etext)); | |
1727 | datapages = PAGE_ALIGN(datapages) >> PAGE_SHIFT; | |
1728 | initpages = (((unsigned long) __init_end) - ((unsigned long) __init_begin)); | |
1729 | initpages = PAGE_ALIGN(initpages) >> PAGE_SHIFT; | |
1730 | ||
1731 | printk("Memory: %uk available (%ldk kernel code, %ldk data, %ldk init) [%016lx,%016lx]\n", | |
1732 | nr_free_pages() << (PAGE_SHIFT-10), | |
1733 | codepages << (PAGE_SHIFT-10), | |
1734 | datapages << (PAGE_SHIFT-10), | |
1735 | initpages << (PAGE_SHIFT-10), | |
1736 | PAGE_OFFSET, (last_valid_pfn << PAGE_SHIFT)); | |
1737 | ||
1738 | if (tlb_type == cheetah || tlb_type == cheetah_plus) | |
1739 | cheetah_ecache_flush_init(); | |
1740 | } | |
1741 | ||
1742 | void free_initmem (void) | |
1743 | { | |
1744 | unsigned long addr, initend; | |
1745 | ||
1746 | /* | |
1747 | * The init section is aligned to 8k in vmlinux.lds. Page align for >8k pagesizes. | |
1748 | */ | |
1749 | addr = PAGE_ALIGN((unsigned long)(__init_begin)); | |
1750 | initend = (unsigned long)(__init_end) & PAGE_MASK; | |
1751 | for (; addr < initend; addr += PAGE_SIZE) { | |
1752 | unsigned long page; | |
1753 | struct page *p; | |
1754 | ||
1755 | page = (addr + | |
1756 | ((unsigned long) __va(kern_base)) - | |
1757 | ((unsigned long) KERNBASE)); | |
1758 | memset((void *)addr, 0xcc, PAGE_SIZE); | |
1759 | p = virt_to_page(page); | |
1760 | ||
1761 | ClearPageReserved(p); | |
1762 | set_page_count(p, 1); | |
1763 | __free_page(p); | |
1764 | num_physpages++; | |
1765 | totalram_pages++; | |
1766 | } | |
1767 | } | |
1768 | ||
1769 | #ifdef CONFIG_BLK_DEV_INITRD | |
1770 | void free_initrd_mem(unsigned long start, unsigned long end) | |
1771 | { | |
1772 | if (start < end) | |
1773 | printk ("Freeing initrd memory: %ldk freed\n", (end - start) >> 10); | |
1774 | for (; start < end; start += PAGE_SIZE) { | |
1775 | struct page *p = virt_to_page(start); | |
1776 | ||
1777 | ClearPageReserved(p); | |
1778 | set_page_count(p, 1); | |
1779 | __free_page(p); | |
1780 | num_physpages++; | |
1781 | totalram_pages++; | |
1782 | } | |
1783 | } | |
1784 | #endif |