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14#include <linux/module.h>
15#include <linux/mm.h>
16#include <linux/bootmem.h>
17#include <linux/gfp.h>
18#include <linux/delay.h>
19#include <linux/init.h>
20#include <linux/pci.h>
21#include <linux/initrd.h>
22#include <linux/swap.h>
23#include <linux/unistd.h>
24#include <linux/nodemask.h>
25#include <linux/pagemap.h>
26
27#include <asm/pgalloc.h>
28#include <asm/pgtable.h>
29#include <asm/tlb.h>
30#include <asm/pdc_chassis.h>
31#include <asm/mmzone.h>
32#include <asm/sections.h>
33
34extern int data_start;
35
36#if PT_NLEVELS == 3
37
38
39
40
41
42pmd_t pmd0[PTRS_PER_PMD] __attribute__ ((__section__ (".data..vm0.pmd"), aligned(PAGE_SIZE)));
43#endif
44
45pgd_t swapper_pg_dir[PTRS_PER_PGD] __attribute__ ((__section__ (".data..vm0.pgd"), aligned(PAGE_SIZE)));
46pte_t pg0[PT_INITIAL * PTRS_PER_PTE] __attribute__ ((__section__ (".data..vm0.pte"), aligned(PAGE_SIZE)));
47
48#ifdef CONFIG_DISCONTIGMEM
49struct node_map_data node_data[MAX_NUMNODES] __read_mostly;
50signed char pfnnid_map[PFNNID_MAP_MAX] __read_mostly;
51#endif
52
53static struct resource data_resource = {
54 .name = "Kernel data",
55 .flags = IORESOURCE_BUSY | IORESOURCE_MEM,
56};
57
58static struct resource code_resource = {
59 .name = "Kernel code",
60 .flags = IORESOURCE_BUSY | IORESOURCE_MEM,
61};
62
63static struct resource pdcdata_resource = {
64 .name = "PDC data (Page Zero)",
65 .start = 0,
66 .end = 0x9ff,
67 .flags = IORESOURCE_BUSY | IORESOURCE_MEM,
68};
69
70static struct resource sysram_resources[MAX_PHYSMEM_RANGES] __read_mostly;
71
72
73
74
75
76physmem_range_t pmem_ranges[MAX_PHYSMEM_RANGES] __read_mostly;
77int npmem_ranges __read_mostly;
78
79#ifdef CONFIG_64BIT
80#define MAX_MEM (~0UL)
81#else
82#define MAX_MEM (3584U*1024U*1024U)
83#endif
84
85static unsigned long mem_limit __read_mostly = MAX_MEM;
86
87static void __init mem_limit_func(void)
88{
89 char *cp, *end;
90 unsigned long limit;
91
92
93
94 limit = MAX_MEM;
95 for (cp = boot_command_line; *cp; ) {
96 if (memcmp(cp, "mem=", 4) == 0) {
97 cp += 4;
98 limit = memparse(cp, &end);
99 if (end != cp)
100 break;
101 cp = end;
102 } else {
103 while (*cp != ' ' && *cp)
104 ++cp;
105 while (*cp == ' ')
106 ++cp;
107 }
108 }
109
110 if (limit < mem_limit)
111 mem_limit = limit;
112}
113
114#define MAX_GAP (0x40000000UL >> PAGE_SHIFT)
115
116static void __init setup_bootmem(void)
117{
118 unsigned long bootmap_size;
119 unsigned long mem_max;
120 unsigned long bootmap_pages;
121 unsigned long bootmap_start_pfn;
122 unsigned long bootmap_pfn;
123#ifndef CONFIG_DISCONTIGMEM
124 physmem_range_t pmem_holes[MAX_PHYSMEM_RANGES - 1];
125 int npmem_holes;
126#endif
127 int i, sysram_resource_count;
128
129 disable_sr_hashing();
130
131
132
133
134
135
136
137 for (i = 1; i < npmem_ranges; i++) {
138 int j;
139
140 for (j = i; j > 0; j--) {
141 unsigned long tmp;
142
143 if (pmem_ranges[j-1].start_pfn <
144 pmem_ranges[j].start_pfn) {
145
146 break;
147 }
148 tmp = pmem_ranges[j-1].start_pfn;
149 pmem_ranges[j-1].start_pfn = pmem_ranges[j].start_pfn;
150 pmem_ranges[j].start_pfn = tmp;
151 tmp = pmem_ranges[j-1].pages;
152 pmem_ranges[j-1].pages = pmem_ranges[j].pages;
153 pmem_ranges[j].pages = tmp;
154 }
155 }
156
157#ifndef CONFIG_DISCONTIGMEM
158
159
160
161
162
163 for (i = 1; i < npmem_ranges; i++) {
164 if (pmem_ranges[i].start_pfn -
165 (pmem_ranges[i-1].start_pfn +
166 pmem_ranges[i-1].pages) > MAX_GAP) {
167 npmem_ranges = i;
168 printk("Large gap in memory detected (%ld pages). "
169 "Consider turning on CONFIG_DISCONTIGMEM\n",
170 pmem_ranges[i].start_pfn -
171 (pmem_ranges[i-1].start_pfn +
172 pmem_ranges[i-1].pages));
173 break;
174 }
175 }
176#endif
177
178 if (npmem_ranges > 1) {
179
180
181
182 printk(KERN_INFO "Memory Ranges:\n");
183
184 for (i = 0; i < npmem_ranges; i++) {
185 unsigned long start;
186 unsigned long size;
187
188 size = (pmem_ranges[i].pages << PAGE_SHIFT);
189 start = (pmem_ranges[i].start_pfn << PAGE_SHIFT);
190 printk(KERN_INFO "%2d) Start 0x%016lx End 0x%016lx Size %6ld MB\n",
191 i,start, start + (size - 1), size >> 20);
192 }
193 }
194
195 sysram_resource_count = npmem_ranges;
196 for (i = 0; i < sysram_resource_count; i++) {
197 struct resource *res = &sysram_resources[i];
198 res->name = "System RAM";
199 res->start = pmem_ranges[i].start_pfn << PAGE_SHIFT;
200 res->end = res->start + (pmem_ranges[i].pages << PAGE_SHIFT)-1;
201 res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
202 request_resource(&iomem_resource, res);
203 }
204
205
206
207
208
209
210
211
212
213
214 mem_limit_func();
215
216 mem_max = 0;
217 for (i = 0; i < npmem_ranges; i++) {
218 unsigned long rsize;
219
220 rsize = pmem_ranges[i].pages << PAGE_SHIFT;
221 if ((mem_max + rsize) > mem_limit) {
222 printk(KERN_WARNING "Memory truncated to %ld MB\n", mem_limit >> 20);
223 if (mem_max == mem_limit)
224 npmem_ranges = i;
225 else {
226 pmem_ranges[i].pages = (mem_limit >> PAGE_SHIFT)
227 - (mem_max >> PAGE_SHIFT);
228 npmem_ranges = i + 1;
229 mem_max = mem_limit;
230 }
231 break;
232 }
233 mem_max += rsize;
234 }
235
236 printk(KERN_INFO "Total Memory: %ld MB\n",mem_max >> 20);
237
238#ifndef CONFIG_DISCONTIGMEM
239
240
241 {
242 unsigned long end_pfn;
243 unsigned long hole_pages;
244
245 npmem_holes = 0;
246 end_pfn = pmem_ranges[0].start_pfn + pmem_ranges[0].pages;
247 for (i = 1; i < npmem_ranges; i++) {
248
249 hole_pages = pmem_ranges[i].start_pfn - end_pfn;
250 if (hole_pages) {
251 pmem_holes[npmem_holes].start_pfn = end_pfn;
252 pmem_holes[npmem_holes++].pages = hole_pages;
253 end_pfn += hole_pages;
254 }
255 end_pfn += pmem_ranges[i].pages;
256 }
257
258 pmem_ranges[0].pages = end_pfn - pmem_ranges[0].start_pfn;
259 npmem_ranges = 1;
260 }
261#endif
262
263 bootmap_pages = 0;
264 for (i = 0; i < npmem_ranges; i++)
265 bootmap_pages += bootmem_bootmap_pages(pmem_ranges[i].pages);
266
267 bootmap_start_pfn = PAGE_ALIGN(__pa((unsigned long) &_end)) >> PAGE_SHIFT;
268
269#ifdef CONFIG_DISCONTIGMEM
270 for (i = 0; i < MAX_PHYSMEM_RANGES; i++) {
271 memset(NODE_DATA(i), 0, sizeof(pg_data_t));
272 NODE_DATA(i)->bdata = &bootmem_node_data[i];
273 }
274 memset(pfnnid_map, 0xff, sizeof(pfnnid_map));
275
276 for (i = 0; i < npmem_ranges; i++) {
277 node_set_state(i, N_NORMAL_MEMORY);
278 node_set_online(i);
279 }
280#endif
281
282
283
284
285
286
287
288
289 bootmap_pfn = bootmap_start_pfn;
290 max_pfn = 0;
291 for (i = 0; i < npmem_ranges; i++) {
292 unsigned long start_pfn;
293 unsigned long npages;
294
295 start_pfn = pmem_ranges[i].start_pfn;
296 npages = pmem_ranges[i].pages;
297
298 bootmap_size = init_bootmem_node(NODE_DATA(i),
299 bootmap_pfn,
300 start_pfn,
301 (start_pfn + npages) );
302 free_bootmem_node(NODE_DATA(i),
303 (start_pfn << PAGE_SHIFT),
304 (npages << PAGE_SHIFT) );
305 bootmap_pfn += (bootmap_size + PAGE_SIZE - 1) >> PAGE_SHIFT;
306 if ((start_pfn + npages) > max_pfn)
307 max_pfn = start_pfn + npages;
308 }
309
310
311
312
313
314
315 max_low_pfn = max_pfn;
316
317
318 BUG_ON((bootmap_pfn - bootmap_start_pfn) != bootmap_pages);
319
320
321
322#define PDC_CONSOLE_IO_IODC_SIZE 32768
323
324 reserve_bootmem_node(NODE_DATA(0), 0UL,
325 (unsigned long)(PAGE0->mem_free +
326 PDC_CONSOLE_IO_IODC_SIZE), BOOTMEM_DEFAULT);
327 reserve_bootmem_node(NODE_DATA(0), __pa((unsigned long)_text),
328 (unsigned long)(_end - _text), BOOTMEM_DEFAULT);
329 reserve_bootmem_node(NODE_DATA(0), (bootmap_start_pfn << PAGE_SHIFT),
330 ((bootmap_pfn - bootmap_start_pfn) << PAGE_SHIFT),
331 BOOTMEM_DEFAULT);
332
333#ifndef CONFIG_DISCONTIGMEM
334
335
336
337 for (i = 0; i < npmem_holes; i++) {
338 reserve_bootmem_node(NODE_DATA(0),
339 (pmem_holes[i].start_pfn << PAGE_SHIFT),
340 (pmem_holes[i].pages << PAGE_SHIFT),
341 BOOTMEM_DEFAULT);
342 }
343#endif
344
345#ifdef CONFIG_BLK_DEV_INITRD
346 if (initrd_start) {
347 printk(KERN_INFO "initrd: %08lx-%08lx\n", initrd_start, initrd_end);
348 if (__pa(initrd_start) < mem_max) {
349 unsigned long initrd_reserve;
350
351 if (__pa(initrd_end) > mem_max) {
352 initrd_reserve = mem_max - __pa(initrd_start);
353 } else {
354 initrd_reserve = initrd_end - initrd_start;
355 }
356 initrd_below_start_ok = 1;
357 printk(KERN_INFO "initrd: reserving %08lx-%08lx (mem_max %08lx)\n", __pa(initrd_start), __pa(initrd_start) + initrd_reserve, mem_max);
358
359 reserve_bootmem_node(NODE_DATA(0), __pa(initrd_start),
360 initrd_reserve, BOOTMEM_DEFAULT);
361 }
362 }
363#endif
364
365 data_resource.start = virt_to_phys(&data_start);
366 data_resource.end = virt_to_phys(_end) - 1;
367 code_resource.start = virt_to_phys(_text);
368 code_resource.end = virt_to_phys(&data_start)-1;
369
370
371
372
373 for (i = 0; i < sysram_resource_count; i++) {
374 struct resource *res = &sysram_resources[i];
375 request_resource(res, &code_resource);
376 request_resource(res, &data_resource);
377 }
378 request_resource(&sysram_resources[0], &pdcdata_resource);
379}
380
381static void __init map_pages(unsigned long start_vaddr,
382 unsigned long start_paddr, unsigned long size,
383 pgprot_t pgprot, int force)
384{
385 pgd_t *pg_dir;
386 pmd_t *pmd;
387 pte_t *pg_table;
388 unsigned long end_paddr;
389 unsigned long start_pmd;
390 unsigned long start_pte;
391 unsigned long tmp1;
392 unsigned long tmp2;
393 unsigned long address;
394 unsigned long vaddr;
395 unsigned long ro_start;
396 unsigned long ro_end;
397 unsigned long fv_addr;
398 unsigned long gw_addr;
399 extern const unsigned long fault_vector_20;
400 extern void * const linux_gateway_page;
401
402 ro_start = __pa((unsigned long)_text);
403 ro_end = __pa((unsigned long)&data_start);
404 fv_addr = __pa((unsigned long)&fault_vector_20) & PAGE_MASK;
405 gw_addr = __pa((unsigned long)&linux_gateway_page) & PAGE_MASK;
406
407 end_paddr = start_paddr + size;
408
409 pg_dir = pgd_offset_k(start_vaddr);
410
411#if PTRS_PER_PMD == 1
412 start_pmd = 0;
413#else
414 start_pmd = ((start_vaddr >> PMD_SHIFT) & (PTRS_PER_PMD - 1));
415#endif
416 start_pte = ((start_vaddr >> PAGE_SHIFT) & (PTRS_PER_PTE - 1));
417
418 address = start_paddr;
419 vaddr = start_vaddr;
420 while (address < end_paddr) {
421#if PTRS_PER_PMD == 1
422 pmd = (pmd_t *)__pa(pg_dir);
423#else
424 pmd = (pmd_t *)pgd_address(*pg_dir);
425
426
427
428
429
430 if (!pmd) {
431 pmd = (pmd_t *) alloc_bootmem_low_pages_node(NODE_DATA(0), PAGE_SIZE << PMD_ORDER);
432 pmd = (pmd_t *) __pa(pmd);
433 }
434
435 pgd_populate(NULL, pg_dir, __va(pmd));
436#endif
437 pg_dir++;
438
439
440
441 pmd = (pmd_t *)__va(pmd) + start_pmd;
442 for (tmp1 = start_pmd; tmp1 < PTRS_PER_PMD; tmp1++, pmd++) {
443
444
445
446
447
448 pg_table = (pte_t *)pmd_address(*pmd);
449 if (!pg_table) {
450 pg_table = (pte_t *)
451 alloc_bootmem_low_pages_node(NODE_DATA(0), PAGE_SIZE);
452 pg_table = (pte_t *) __pa(pg_table);
453 }
454
455 pmd_populate_kernel(NULL, pmd, __va(pg_table));
456
457
458
459 pg_table = (pte_t *) __va(pg_table) + start_pte;
460 for (tmp2 = start_pte; tmp2 < PTRS_PER_PTE; tmp2++, pg_table++) {
461 pte_t pte;
462
463
464
465
466
467 if (force)
468 pte = __mk_pte(address, pgprot);
469 else if (core_kernel_text(vaddr) &&
470 address != fv_addr)
471 pte = __mk_pte(address, PAGE_KERNEL_EXEC);
472 else
473#if defined(CONFIG_PARISC_PAGE_SIZE_4KB)
474 if (address >= ro_start && address < ro_end
475 && address != fv_addr
476 && address != gw_addr)
477 pte = __mk_pte(address, PAGE_KERNEL_RO);
478 else
479#endif
480 pte = __mk_pte(address, pgprot);
481
482 if (address >= end_paddr) {
483 if (force)
484 break;
485 else
486 pte_val(pte) = 0;
487 }
488
489 set_pte(pg_table, pte);
490
491 address += PAGE_SIZE;
492 vaddr += PAGE_SIZE;
493 }
494 start_pte = 0;
495
496 if (address >= end_paddr)
497 break;
498 }
499 start_pmd = 0;
500 }
501}
502
503void free_initmem(void)
504{
505 unsigned long init_begin = (unsigned long)__init_begin;
506 unsigned long init_end = (unsigned long)__init_end;
507
508
509
510
511
512
513
514
515 map_pages(init_begin, __pa(init_begin), init_end - init_begin,
516 PAGE_KERNEL_RWX, 1);
517
518
519 map_pages(init_begin, __pa(init_begin), init_end - init_begin,
520 PAGE_KERNEL, 1);
521
522
523 __flush_tlb_range(0, init_begin, init_end);
524
525
526
527 memset((void *)init_begin, 0x00, init_end - init_begin);
528
529
530 flush_icache_range(init_begin, init_end);
531
532 free_initmem_default(-1);
533
534
535 pdc_chassis_send_status(PDC_CHASSIS_DIRECT_BCOMPLETE);
536}
537
538
539#ifdef CONFIG_DEBUG_RODATA
540void mark_rodata_ro(void)
541{
542
543
544 printk (KERN_INFO "Write protecting the kernel read-only data: %luk\n",
545 (unsigned long)(__end_rodata - __start_rodata) >> 10);
546}
547#endif
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562#if KERNEL_MAP_START < GATEWAY_PAGE_SIZE
563#error KERNEL_MAP_START is in gateway reserved region
564#endif
565#define MAP_START (KERNEL_MAP_START)
566
567#define VM_MAP_OFFSET (32*1024)
568#define SET_MAP_OFFSET(x) ((void *)(((unsigned long)(x) + VM_MAP_OFFSET) \
569 & ~(VM_MAP_OFFSET-1)))
570
571void *parisc_vmalloc_start __read_mostly;
572EXPORT_SYMBOL(parisc_vmalloc_start);
573
574#ifdef CONFIG_PA11
575unsigned long pcxl_dma_start __read_mostly;
576#endif
577
578void __init mem_init(void)
579{
580
581 BUILD_BUG_ON(PTE_ENTRY_SIZE != sizeof(pte_t));
582 BUILD_BUG_ON(PMD_ENTRY_SIZE != sizeof(pmd_t));
583 BUILD_BUG_ON(PGD_ENTRY_SIZE != sizeof(pgd_t));
584 BUILD_BUG_ON(PAGE_SHIFT + BITS_PER_PTE + BITS_PER_PMD + BITS_PER_PGD
585 > BITS_PER_LONG);
586
587 high_memory = __va((max_pfn << PAGE_SHIFT));
588 set_max_mapnr(page_to_pfn(virt_to_page(high_memory - 1)) + 1);
589 free_all_bootmem();
590
591#ifdef CONFIG_PA11
592 if (hppa_dma_ops == &pcxl_dma_ops) {
593 pcxl_dma_start = (unsigned long)SET_MAP_OFFSET(MAP_START);
594 parisc_vmalloc_start = SET_MAP_OFFSET(pcxl_dma_start
595 + PCXL_DMA_MAP_SIZE);
596 } else {
597 pcxl_dma_start = 0;
598 parisc_vmalloc_start = SET_MAP_OFFSET(MAP_START);
599 }
600#else
601 parisc_vmalloc_start = SET_MAP_OFFSET(MAP_START);
602#endif
603
604 mem_init_print_info(NULL);
605#ifdef CONFIG_DEBUG_KERNEL
606 printk("virtual kernel memory layout:\n"
607 " vmalloc : 0x%p - 0x%p (%4ld MB)\n"
608 " memory : 0x%p - 0x%p (%4ld MB)\n"
609 " .init : 0x%p - 0x%p (%4ld kB)\n"
610 " .data : 0x%p - 0x%p (%4ld kB)\n"
611 " .text : 0x%p - 0x%p (%4ld kB)\n",
612
613 (void*)VMALLOC_START, (void*)VMALLOC_END,
614 (VMALLOC_END - VMALLOC_START) >> 20,
615
616 __va(0), high_memory,
617 ((unsigned long)high_memory - (unsigned long)__va(0)) >> 20,
618
619 __init_begin, __init_end,
620 ((unsigned long)__init_end - (unsigned long)__init_begin) >> 10,
621
622 _etext, _edata,
623 ((unsigned long)_edata - (unsigned long)_etext) >> 10,
624
625 _text, _etext,
626 ((unsigned long)_etext - (unsigned long)_text) >> 10);
627#endif
628}
629
630unsigned long *empty_zero_page __read_mostly;
631EXPORT_SYMBOL(empty_zero_page);
632
633void show_mem(unsigned int filter)
634{
635 int i,free = 0,total = 0,reserved = 0;
636 int shared = 0, cached = 0;
637
638 printk(KERN_INFO "Mem-info:\n");
639 show_free_areas(filter);
640 if (filter & SHOW_MEM_FILTER_PAGE_COUNT)
641 return;
642#ifndef CONFIG_DISCONTIGMEM
643 i = max_mapnr;
644 while (i-- > 0) {
645 total++;
646 if (PageReserved(mem_map+i))
647 reserved++;
648 else if (PageSwapCache(mem_map+i))
649 cached++;
650 else if (!page_count(&mem_map[i]))
651 free++;
652 else
653 shared += page_count(&mem_map[i]) - 1;
654 }
655#else
656 for (i = 0; i < npmem_ranges; i++) {
657 int j;
658
659 for (j = node_start_pfn(i); j < node_end_pfn(i); j++) {
660 struct page *p;
661 unsigned long flags;
662
663 pgdat_resize_lock(NODE_DATA(i), &flags);
664 p = nid_page_nr(i, j) - node_start_pfn(i);
665
666 total++;
667 if (PageReserved(p))
668 reserved++;
669 else if (PageSwapCache(p))
670 cached++;
671 else if (!page_count(p))
672 free++;
673 else
674 shared += page_count(p) - 1;
675 pgdat_resize_unlock(NODE_DATA(i), &flags);
676 }
677 }
678#endif
679 printk(KERN_INFO "%d pages of RAM\n", total);
680 printk(KERN_INFO "%d reserved pages\n", reserved);
681 printk(KERN_INFO "%d pages shared\n", shared);
682 printk(KERN_INFO "%d pages swap cached\n", cached);
683
684
685#ifdef CONFIG_DISCONTIGMEM
686 {
687 struct zonelist *zl;
688 int i, j;
689
690 for (i = 0; i < npmem_ranges; i++) {
691 zl = node_zonelist(i, 0);
692 for (j = 0; j < MAX_NR_ZONES; j++) {
693 struct zoneref *z;
694 struct zone *zone;
695
696 printk("Zone list for zone %d on node %d: ", j, i);
697 for_each_zone_zonelist(zone, z, zl, j)
698 printk("[%d/%s] ", zone_to_nid(zone),
699 zone->name);
700 printk("\n");
701 }
702 }
703 }
704#endif
705}
706
707
708
709
710
711
712
713
714
715static void __init pagetable_init(void)
716{
717 int range;
718
719
720
721 for (range = 0; range < npmem_ranges; range++) {
722 unsigned long start_paddr;
723 unsigned long end_paddr;
724 unsigned long size;
725
726 start_paddr = pmem_ranges[range].start_pfn << PAGE_SHIFT;
727 end_paddr = start_paddr + (pmem_ranges[range].pages << PAGE_SHIFT);
728 size = pmem_ranges[range].pages << PAGE_SHIFT;
729
730 map_pages((unsigned long)__va(start_paddr), start_paddr,
731 size, PAGE_KERNEL, 0);
732 }
733
734#ifdef CONFIG_BLK_DEV_INITRD
735 if (initrd_end && initrd_end > mem_limit) {
736 printk(KERN_INFO "initrd: mapping %08lx-%08lx\n", initrd_start, initrd_end);
737 map_pages(initrd_start, __pa(initrd_start),
738 initrd_end - initrd_start, PAGE_KERNEL, 0);
739 }
740#endif
741
742 empty_zero_page = alloc_bootmem_pages(PAGE_SIZE);
743 memset(empty_zero_page, 0, PAGE_SIZE);
744}
745
746static void __init gateway_init(void)
747{
748 unsigned long linux_gateway_page_addr;
749
750
751 extern void * const linux_gateway_page;
752
753 linux_gateway_page_addr = LINUX_GATEWAY_ADDR & PAGE_MASK;
754
755
756
757
758
759
760
761
762 map_pages(linux_gateway_page_addr, __pa(&linux_gateway_page),
763 PAGE_SIZE, PAGE_GATEWAY, 1);
764}
765
766#ifdef CONFIG_HPUX
767void
768map_hpux_gateway_page(struct task_struct *tsk, struct mm_struct *mm)
769{
770 pgd_t *pg_dir;
771 pmd_t *pmd;
772 pte_t *pg_table;
773 unsigned long start_pmd;
774 unsigned long start_pte;
775 unsigned long address;
776 unsigned long hpux_gw_page_addr;
777
778
779 extern void * const hpux_gateway_page;
780
781 hpux_gw_page_addr = HPUX_GATEWAY_ADDR & PAGE_MASK;
782
783
784
785
786
787
788
789
790 pg_dir = pgd_offset(mm,hpux_gw_page_addr);
791
792#if PTRS_PER_PMD == 1
793 start_pmd = 0;
794#else
795 start_pmd = ((hpux_gw_page_addr >> PMD_SHIFT) & (PTRS_PER_PMD - 1));
796#endif
797 start_pte = ((hpux_gw_page_addr >> PAGE_SHIFT) & (PTRS_PER_PTE - 1));
798
799 address = __pa(&hpux_gateway_page);
800#if PTRS_PER_PMD == 1
801 pmd = (pmd_t *)__pa(pg_dir);
802#else
803 pmd = (pmd_t *) pgd_address(*pg_dir);
804
805
806
807
808
809 if (!pmd) {
810 pmd = (pmd_t *) get_zeroed_page(GFP_KERNEL);
811 pmd = (pmd_t *) __pa(pmd);
812 }
813
814 __pgd_val_set(*pg_dir, PxD_FLAG_PRESENT | PxD_FLAG_VALID | (unsigned long) pmd);
815#endif
816
817
818 pmd = (pmd_t *)__va(pmd) + start_pmd;
819
820
821
822
823
824 pg_table = (pte_t *) pmd_address(*pmd);
825 if (!pg_table)
826 pg_table = (pte_t *) __pa(get_zeroed_page(GFP_KERNEL));
827
828 __pmd_val_set(*pmd, PxD_FLAG_PRESENT | PxD_FLAG_VALID | (unsigned long) pg_table);
829
830
831
832 pg_table = (pte_t *) __va(pg_table) + start_pte;
833 set_pte(pg_table, __mk_pte(address, PAGE_GATEWAY));
834}
835EXPORT_SYMBOL(map_hpux_gateway_page);
836#endif
837
838void __init paging_init(void)
839{
840 int i;
841
842 setup_bootmem();
843 pagetable_init();
844 gateway_init();
845 flush_cache_all_local();
846 flush_tlb_all_local(NULL);
847
848 for (i = 0; i < npmem_ranges; i++) {
849 unsigned long zones_size[MAX_NR_ZONES] = { 0, };
850
851 zones_size[ZONE_NORMAL] = pmem_ranges[i].pages;
852
853#ifdef CONFIG_DISCONTIGMEM
854
855
856 {
857 int j;
858 for (j = (pmem_ranges[i].start_pfn >> PFNNID_SHIFT);
859 j <= ((pmem_ranges[i].start_pfn + pmem_ranges[i].pages) >> PFNNID_SHIFT);
860 j++) {
861 pfnnid_map[j] = i;
862 }
863 }
864#endif
865
866 free_area_init_node(i, zones_size,
867 pmem_ranges[i].start_pfn, NULL);
868 }
869}
870
871#ifdef CONFIG_PA20
872
873
874
875
876
877
878#define NR_SPACE_IDS 262144
879
880#else
881
882
883
884
885
886
887
888
889
890#define NR_SPACE_IDS 32768
891
892#endif
893
894#define RECYCLE_THRESHOLD (NR_SPACE_IDS / 2)
895#define SID_ARRAY_SIZE (NR_SPACE_IDS / (8 * sizeof(long)))
896
897static unsigned long space_id[SID_ARRAY_SIZE] = { 1 };
898static unsigned long dirty_space_id[SID_ARRAY_SIZE];
899static unsigned long space_id_index;
900static unsigned long free_space_ids = NR_SPACE_IDS - 1;
901static unsigned long dirty_space_ids = 0;
902
903static DEFINE_SPINLOCK(sid_lock);
904
905unsigned long alloc_sid(void)
906{
907 unsigned long index;
908
909 spin_lock(&sid_lock);
910
911 if (free_space_ids == 0) {
912 if (dirty_space_ids != 0) {
913 spin_unlock(&sid_lock);
914 flush_tlb_all();
915 spin_lock(&sid_lock);
916 }
917 BUG_ON(free_space_ids == 0);
918 }
919
920 free_space_ids--;
921
922 index = find_next_zero_bit(space_id, NR_SPACE_IDS, space_id_index);
923 space_id[index >> SHIFT_PER_LONG] |= (1L << (index & (BITS_PER_LONG - 1)));
924 space_id_index = index;
925
926 spin_unlock(&sid_lock);
927
928 return index << SPACEID_SHIFT;
929}
930
931void free_sid(unsigned long spaceid)
932{
933 unsigned long index = spaceid >> SPACEID_SHIFT;
934 unsigned long *dirty_space_offset;
935
936 dirty_space_offset = dirty_space_id + (index >> SHIFT_PER_LONG);
937 index &= (BITS_PER_LONG - 1);
938
939 spin_lock(&sid_lock);
940
941 BUG_ON(*dirty_space_offset & (1L << index));
942
943 *dirty_space_offset |= (1L << index);
944 dirty_space_ids++;
945
946 spin_unlock(&sid_lock);
947}
948
949
950#ifdef CONFIG_SMP
951static void get_dirty_sids(unsigned long *ndirtyptr,unsigned long *dirty_array)
952{
953 int i;
954
955
956
957 *ndirtyptr = dirty_space_ids;
958 if (dirty_space_ids != 0) {
959 for (i = 0; i < SID_ARRAY_SIZE; i++) {
960 dirty_array[i] = dirty_space_id[i];
961 dirty_space_id[i] = 0;
962 }
963 dirty_space_ids = 0;
964 }
965
966 return;
967}
968
969static void recycle_sids(unsigned long ndirty,unsigned long *dirty_array)
970{
971 int i;
972
973
974
975 if (ndirty != 0) {
976 for (i = 0; i < SID_ARRAY_SIZE; i++) {
977 space_id[i] ^= dirty_array[i];
978 }
979
980 free_space_ids += ndirty;
981 space_id_index = 0;
982 }
983}
984
985#else
986
987static void recycle_sids(void)
988{
989 int i;
990
991
992
993 if (dirty_space_ids != 0) {
994 for (i = 0; i < SID_ARRAY_SIZE; i++) {
995 space_id[i] ^= dirty_space_id[i];
996 dirty_space_id[i] = 0;
997 }
998
999 free_space_ids += dirty_space_ids;
1000 dirty_space_ids = 0;
1001 space_id_index = 0;
1002 }
1003}
1004#endif
1005
1006
1007
1008
1009
1010
1011
1012#ifdef CONFIG_SMP
1013
1014static unsigned long recycle_ndirty;
1015static unsigned long recycle_dirty_array[SID_ARRAY_SIZE];
1016static unsigned int recycle_inuse;
1017
1018void flush_tlb_all(void)
1019{
1020 int do_recycle;
1021
1022 __inc_irq_stat(irq_tlb_count);
1023 do_recycle = 0;
1024 spin_lock(&sid_lock);
1025 if (dirty_space_ids > RECYCLE_THRESHOLD) {
1026 BUG_ON(recycle_inuse);
1027 get_dirty_sids(&recycle_ndirty,recycle_dirty_array);
1028 recycle_inuse++;
1029 do_recycle++;
1030 }
1031 spin_unlock(&sid_lock);
1032 on_each_cpu(flush_tlb_all_local, NULL, 1);
1033 if (do_recycle) {
1034 spin_lock(&sid_lock);
1035 recycle_sids(recycle_ndirty,recycle_dirty_array);
1036 recycle_inuse = 0;
1037 spin_unlock(&sid_lock);
1038 }
1039}
1040#else
1041void flush_tlb_all(void)
1042{
1043 __inc_irq_stat(irq_tlb_count);
1044 spin_lock(&sid_lock);
1045 flush_tlb_all_local(NULL);
1046 recycle_sids();
1047 spin_unlock(&sid_lock);
1048}
1049#endif
1050
1051#ifdef CONFIG_BLK_DEV_INITRD
1052void free_initrd_mem(unsigned long start, unsigned long end)
1053{
1054 free_reserved_area((void *)start, (void *)end, -1, "initrd");
1055}
1056#endif
1057