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10#include <linux/config.h>
11#include <linux/signal.h>
12#include <linux/sched.h>
13#include <linux/kernel.h>
14#include <linux/errno.h>
15#include <linux/string.h>
16#include <linux/types.h>
17#include <linux/ptrace.h>
18#include <linux/mman.h>
19#include <linux/mm.h>
20#include <linux/swap.h>
21#include <linux/swapctl.h>
22#ifdef CONFIG_BLK_DEV_INITRD
23#include <linux/blk.h>
24#endif
25#include <linux/init.h>
26#include <linux/highmem.h>
27#include <linux/bootmem.h>
28
29#include <asm/system.h>
30#include <asm/segment.h>
31#include <asm/vac-ops.h>
32#include <asm/page.h>
33#include <asm/pgtable.h>
34#include <asm/vaddrs.h>
35#include <asm/tlb.h>
36
37mmu_gather_t mmu_gathers[NR_CPUS];
38
39unsigned long *sparc_valid_addr_bitmap;
40
41unsigned long phys_base;
42
43unsigned long page_kernel;
44
45struct sparc_phys_banks sp_banks[SPARC_PHYS_BANKS];
46unsigned long sparc_unmapped_base;
47
48struct pgtable_cache_struct pgt_quicklists;
49
50
51extern char __init_begin, __init_end, _start, _end, etext , edata;
52
53
54extern unsigned int sparc_ramdisk_image;
55extern unsigned int sparc_ramdisk_size;
56
57unsigned long highstart_pfn, highend_pfn;
58unsigned long totalram_pages;
59unsigned long totalhigh_pages;
60
61pte_t *kmap_pte;
62pgprot_t kmap_prot;
63
64
65unsigned long fix_kmap_begin;
66unsigned long fix_kmap_end;
67
68#define kmap_get_fixed_pte(vaddr) \
69 pte_offset(pmd_offset(pgd_offset_k(vaddr), (vaddr)), (vaddr))
70
71void __init kmap_init(void)
72{
73
74 kmap_pte = kmap_get_fixed_pte(fix_kmap_begin);
75 kmap_prot = __pgprot(SRMMU_ET_PTE | SRMMU_PRIV | SRMMU_CACHE);
76}
77
78void show_mem(void)
79{
80 printk("Mem-info:\n");
81 show_free_areas();
82 printk("Free swap: %6dkB\n",
83 nr_swap_pages << (PAGE_SHIFT-10));
84 printk("%ld pages of RAM\n", totalram_pages);
85 printk("%d free pages\n", nr_free_pages());
86 printk("%ld pages in page table cache\n",pgtable_cache_size);
87#ifndef CONFIG_SMP
88 if (sparc_cpu_model == sun4m || sparc_cpu_model == sun4d)
89 printk("%ld entries in page dir cache\n",pgd_cache_size);
90#endif
91 show_buffers();
92}
93
94extern pgprot_t protection_map[16];
95
96void __init sparc_context_init(int numctx)
97{
98 int ctx;
99
100 ctx_list_pool = __alloc_bootmem(numctx * sizeof(struct ctx_list), SMP_CACHE_BYTES, 0UL);
101
102 for(ctx = 0; ctx < numctx; ctx++) {
103 struct ctx_list *clist;
104
105 clist = (ctx_list_pool + ctx);
106 clist->ctx_number = ctx;
107 clist->ctx_mm = 0;
108 }
109 ctx_free.next = ctx_free.prev = &ctx_free;
110 ctx_used.next = ctx_used.prev = &ctx_used;
111 for(ctx = 0; ctx < numctx; ctx++)
112 add_to_free_ctxlist(ctx_list_pool + ctx);
113}
114
115#define DEBUG_BOOTMEM
116
117extern unsigned long cmdline_memory_size;
118unsigned long last_valid_pfn;
119
120unsigned long calc_highpages(void)
121{
122 int i;
123 int nr = 0;
124
125 for (i = 0; sp_banks[i].num_bytes != 0; i++) {
126 unsigned long start_pfn = sp_banks[i].base_addr >> PAGE_SHIFT;
127 unsigned long end_pfn = (sp_banks[i].base_addr + sp_banks[i].num_bytes) >> PAGE_SHIFT;
128
129 if (end_pfn <= max_low_pfn)
130 continue;
131
132 if (start_pfn < max_low_pfn)
133 start_pfn = max_low_pfn;
134
135 nr += end_pfn - start_pfn;
136 }
137
138 return nr;
139}
140
141unsigned long calc_max_low_pfn(void)
142{
143 int i;
144 unsigned long tmp = (SRMMU_MAXMEM >> PAGE_SHIFT);
145 unsigned long curr_pfn, last_pfn;
146
147 last_pfn = (sp_banks[0].base_addr + sp_banks[0].num_bytes) >> PAGE_SHIFT;
148 for (i = 1; sp_banks[i].num_bytes != 0; i++) {
149 curr_pfn = sp_banks[i].base_addr >> PAGE_SHIFT;
150
151 if (curr_pfn >= tmp) {
152 if (last_pfn < tmp)
153 tmp = last_pfn;
154 break;
155 }
156
157 last_pfn = (sp_banks[i].base_addr + sp_banks[i].num_bytes) >> PAGE_SHIFT;
158 }
159
160 return tmp;
161}
162
163unsigned long __init bootmem_init(unsigned long *pages_avail)
164{
165 unsigned long bootmap_size, start_pfn, max_pfn;
166 unsigned long end_of_phys_memory = 0UL;
167 unsigned long bootmap_pfn, bytes_avail, size;
168 int i;
169
170#ifdef DEBUG_BOOTMEM
171 prom_printf("bootmem_init: Scan sp_banks, ");
172#endif
173 bytes_avail = 0UL;
174 for (i = 0; sp_banks[i].num_bytes != 0; i++) {
175 end_of_phys_memory = sp_banks[i].base_addr +
176 sp_banks[i].num_bytes;
177 bytes_avail += sp_banks[i].num_bytes;
178 if (cmdline_memory_size) {
179 if (bytes_avail > cmdline_memory_size) {
180 unsigned long slack = bytes_avail - cmdline_memory_size;
181
182 bytes_avail -= slack;
183 end_of_phys_memory -= slack;
184
185 sp_banks[i].num_bytes -= slack;
186 if (sp_banks[i].num_bytes == 0) {
187 sp_banks[i].base_addr = 0xdeadbeef;
188 } else {
189 sp_banks[i+1].num_bytes = 0;
190 sp_banks[i+1].base_addr = 0xdeadbeef;
191 }
192 break;
193 }
194 }
195 }
196
197
198
199
200 start_pfn = (unsigned long)__pa(PAGE_ALIGN((unsigned long) &_end));
201
202
203 start_pfn += phys_base;
204
205
206 start_pfn >>= PAGE_SHIFT;
207
208 bootmap_pfn = start_pfn;
209
210 max_pfn = end_of_phys_memory >> PAGE_SHIFT;
211
212 max_low_pfn = max_pfn;
213 highstart_pfn = highend_pfn = max_pfn;
214
215 if (max_low_pfn > (SRMMU_MAXMEM >> PAGE_SHIFT)) {
216 highstart_pfn = (SRMMU_MAXMEM >> PAGE_SHIFT);
217 max_low_pfn = calc_max_low_pfn();
218 printk(KERN_NOTICE "%ldMB HIGHMEM available.\n", calc_highpages());
219 }
220
221#ifdef CONFIG_BLK_DEV_INITRD
222
223 if (sparc_ramdisk_image) {
224 if (sparc_ramdisk_image >= (unsigned long)&_end - 2 * PAGE_SIZE)
225 sparc_ramdisk_image -= KERNBASE;
226 initrd_start = sparc_ramdisk_image + phys_base;
227 initrd_end = initrd_start + sparc_ramdisk_size;
228 if (initrd_end > end_of_phys_memory) {
229 printk(KERN_CRIT "initrd extends beyond end of memory "
230 "(0x%016lx > 0x%016lx)\ndisabling initrd\n",
231 initrd_end, end_of_phys_memory);
232 initrd_start = 0;
233 }
234 if (initrd_start) {
235 if (initrd_start >= (start_pfn << PAGE_SHIFT) &&
236 initrd_start < (start_pfn << PAGE_SHIFT) + 2 * PAGE_SIZE)
237 bootmap_pfn = PAGE_ALIGN (initrd_end) >> PAGE_SHIFT;
238 }
239 }
240#endif
241
242#ifdef DEBUG_BOOTMEM
243 prom_printf("init_bootmem(spfn[%lx],bpfn[%lx],mlpfn[%lx])\n",
244 start_pfn, bootmap_pfn, max_low_pfn);
245#endif
246 bootmap_size = init_bootmem_node(NODE_DATA(0), bootmap_pfn, phys_base>>PAGE_SHIFT, max_low_pfn);
247
248
249
250
251 *pages_avail = 0;
252 for (i = 0; sp_banks[i].num_bytes != 0; i++) {
253 unsigned long curr_pfn, last_pfn;
254
255 curr_pfn = sp_banks[i].base_addr >> PAGE_SHIFT;
256 if (curr_pfn >= max_low_pfn)
257 break;
258
259 last_pfn = (sp_banks[i].base_addr + sp_banks[i].num_bytes) >> PAGE_SHIFT;
260 if (last_pfn > max_low_pfn)
261 last_pfn = max_low_pfn;
262
263
264
265
266
267 if (last_pfn <= curr_pfn)
268 continue;
269
270 size = (last_pfn - curr_pfn) << PAGE_SHIFT;
271 *pages_avail += last_pfn - curr_pfn;
272#ifdef DEBUG_BOOTMEM
273 prom_printf("free_bootmem: base[%lx] size[%lx]\n",
274 sp_banks[i].base_addr,
275 size);
276#endif
277 free_bootmem(sp_banks[i].base_addr,
278 size);
279 }
280
281#ifdef CONFIG_BLK_DEV_INITRD
282 if (initrd_start) {
283 size = initrd_end - initrd_start;
284#ifdef DEBUG_BOOTMEM
285 prom_printf("reserve_bootmem: base[%lx] size[%lx]\n",
286 initrd_start, size);
287#endif
288
289 reserve_bootmem(initrd_start, size);
290 *pages_avail -= PAGE_ALIGN(size) >> PAGE_SHIFT;
291
292 initrd_start += PAGE_OFFSET;
293 initrd_end += PAGE_OFFSET;
294 }
295#endif
296
297 size = (start_pfn << PAGE_SHIFT) - phys_base;
298#ifdef DEBUG_BOOTMEM
299 prom_printf("reserve_bootmem: base[%lx] size[%lx]\n", phys_base, size);
300#endif
301 reserve_bootmem(phys_base, size);
302 *pages_avail -= PAGE_ALIGN(size) >> PAGE_SHIFT;
303
304
305
306
307
308 size = bootmap_size;
309#ifdef DEBUG_BOOTMEM
310 prom_printf("reserve_bootmem: base[%lx] size[%lx]\n",
311 (bootmap_pfn << PAGE_SHIFT), size);
312#endif
313 reserve_bootmem((bootmap_pfn << PAGE_SHIFT), size);
314 *pages_avail -= PAGE_ALIGN(size) >> PAGE_SHIFT;
315
316 return max_pfn;
317}
318
319
320
321
322
323
324extern void sun4c_paging_init(void);
325extern void srmmu_paging_init(void);
326extern void device_scan(void);
327
328void __init paging_init(void)
329{
330 switch(sparc_cpu_model) {
331 case sun4c:
332 case sun4e:
333 case sun4:
334 sun4c_paging_init();
335 sparc_unmapped_base = 0xe0000000;
336 BTFIXUPSET_SETHI(sparc_unmapped_base, 0xe0000000);
337 break;
338 case sun4m:
339 case sun4d:
340 srmmu_paging_init();
341 sparc_unmapped_base = 0x50000000;
342 BTFIXUPSET_SETHI(sparc_unmapped_base, 0x50000000);
343 break;
344 default:
345 prom_printf("paging_init: Cannot init paging on this Sparc\n");
346 prom_printf("paging_init: sparc_cpu_model = %d\n", sparc_cpu_model);
347 prom_printf("paging_init: Halting...\n");
348 prom_halt();
349 };
350
351
352 protection_map[0] = PAGE_NONE;
353 protection_map[1] = PAGE_READONLY;
354 protection_map[2] = PAGE_COPY;
355 protection_map[3] = PAGE_COPY;
356 protection_map[4] = PAGE_READONLY;
357 protection_map[5] = PAGE_READONLY;
358 protection_map[6] = PAGE_COPY;
359 protection_map[7] = PAGE_COPY;
360 protection_map[8] = PAGE_NONE;
361 protection_map[9] = PAGE_READONLY;
362 protection_map[10] = PAGE_SHARED;
363 protection_map[11] = PAGE_SHARED;
364 protection_map[12] = PAGE_READONLY;
365 protection_map[13] = PAGE_READONLY;
366 protection_map[14] = PAGE_SHARED;
367 protection_map[15] = PAGE_SHARED;
368 btfixup();
369 device_scan();
370}
371
372struct cache_palias *sparc_aliases;
373
374static void __init taint_real_pages(void)
375{
376 int i;
377
378 for (i = 0; sp_banks[i].num_bytes; i++) {
379 unsigned long start, end;
380
381 start = sp_banks[i].base_addr;
382 end = start + sp_banks[i].num_bytes;
383
384 while (start < end) {
385 set_bit (start >> 20,
386 sparc_valid_addr_bitmap);
387 start += PAGE_SIZE;
388 }
389 }
390}
391
392void map_high_region(unsigned long start_pfn, unsigned long end_pfn)
393{
394 unsigned long tmp;
395
396#ifdef DEBUG_HIGHMEM
397 printk("mapping high region %08lx - %08lx\n", start_pfn, end_pfn);
398#endif
399
400 for (tmp = start_pfn; tmp < end_pfn; tmp++) {
401 struct page *page = mem_map + tmp;
402
403 ClearPageReserved(page);
404 set_bit(PG_highmem, &page->flags);
405 atomic_set(&page->count, 1);
406 __free_page(page);
407 totalhigh_pages++;
408 }
409}
410
411void __init mem_init(void)
412{
413 int codepages = 0;
414 int datapages = 0;
415 int initpages = 0;
416 int i;
417
418 highmem_start_page = mem_map + highstart_pfn;
419
420
421 memset((void *)&empty_zero_page, 0, PAGE_SIZE);
422
423 i = last_valid_pfn >> ((20 - PAGE_SHIFT) + 5);
424 i += 1;
425 sparc_valid_addr_bitmap = (unsigned long *)
426 __alloc_bootmem(i << 2, SMP_CACHE_BYTES, 0UL);
427
428 if (sparc_valid_addr_bitmap == NULL) {
429 prom_printf("mem_init: Cannot alloc valid_addr_bitmap.\n");
430 prom_halt();
431 }
432 memset(sparc_valid_addr_bitmap, 0, i << 2);
433
434 taint_real_pages();
435
436 max_mapnr = last_valid_pfn - (phys_base >> PAGE_SHIFT);
437 high_memory = __va(max_low_pfn << PAGE_SHIFT);
438
439#ifdef DEBUG_BOOTMEM
440 prom_printf("mem_init: Calling free_all_bootmem().\n");
441#endif
442 num_physpages = totalram_pages = free_all_bootmem();
443
444 for (i = 0; sp_banks[i].num_bytes != 0; i++) {
445 unsigned long start_pfn = sp_banks[i].base_addr >> PAGE_SHIFT;
446 unsigned long end_pfn = (sp_banks[i].base_addr + sp_banks[i].num_bytes) >> PAGE_SHIFT;
447
448 if (end_pfn <= highstart_pfn)
449 continue;
450
451 if (start_pfn < highstart_pfn)
452 start_pfn = highstart_pfn;
453
454 map_high_region(start_pfn, end_pfn);
455 }
456
457 totalram_pages += totalhigh_pages;
458
459 codepages = (((unsigned long) &etext) - ((unsigned long)&_start));
460 codepages = PAGE_ALIGN(codepages) >> PAGE_SHIFT;
461 datapages = (((unsigned long) &edata) - ((unsigned long)&etext));
462 datapages = PAGE_ALIGN(datapages) >> PAGE_SHIFT;
463 initpages = (((unsigned long) &__init_end) - ((unsigned long) &__init_begin));
464 initpages = PAGE_ALIGN(initpages) >> PAGE_SHIFT;
465
466 printk(KERN_INFO "Memory: %dk available (%dk kernel code, %dk data, %dk init, %ldk highmem) [%08lx,%08lx]\n",
467 nr_free_pages() << (PAGE_SHIFT-10),
468 codepages << (PAGE_SHIFT-10),
469 datapages << (PAGE_SHIFT-10),
470 initpages << (PAGE_SHIFT-10),
471 totalhigh_pages << (PAGE_SHIFT-10),
472 (unsigned long)PAGE_OFFSET, (last_valid_pfn << PAGE_SHIFT));
473}
474
475void free_initmem (void)
476{
477 unsigned long addr;
478
479 addr = (unsigned long)(&__init_begin);
480 for (; addr < (unsigned long)(&__init_end); addr += PAGE_SIZE) {
481 unsigned long page;
482 struct page *p;
483
484 page = addr + phys_base;
485 p = virt_to_page(page);
486
487 ClearPageReserved(p);
488 set_page_count(p, 1);
489 __free_page(p);
490 totalram_pages++;
491 num_physpages++;
492 }
493 printk (KERN_INFO "Freeing unused kernel memory: %dk freed\n", (&__init_end - &__init_begin) >> 10);
494}
495
496#ifdef CONFIG_BLK_DEV_INITRD
497void free_initrd_mem(unsigned long start, unsigned long end)
498{
499 if (start < end)
500 printk (KERN_INFO "Freeing initrd memory: %ldk freed\n", (end - start) >> 10);
501 for (; start < end; start += PAGE_SIZE) {
502 struct page *p = virt_to_page(start);
503
504 ClearPageReserved(p);
505 set_page_count(p, 1);
506 __free_page(p);
507 num_physpages++;
508 }
509}
510#endif
511
512void si_meminfo(struct sysinfo *val)
513{
514 val->totalram = totalram_pages;
515 val->sharedram = 0;
516 val->freeram = nr_free_pages();
517 val->bufferram = atomic_read(&buffermem_pages);
518 val->totalhigh = totalhigh_pages;
519 val->freehigh = nr_free_highpages();
520
521 val->mem_unit = PAGE_SIZE;
522}
523
524void flush_page_to_ram(struct page *page)
525{
526 unsigned long vaddr = (unsigned long)page_address(page);
527
528 if (vaddr)
529 __flush_page_to_ram(vaddr);
530}
531
