diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/powerpc/mm/init_64.c')
| -rw-r--r-- | ANDROID_3.4.5/arch/powerpc/mm/init_64.c | 302 |
1 files changed, 0 insertions, 302 deletions
diff --git a/ANDROID_3.4.5/arch/powerpc/mm/init_64.c b/ANDROID_3.4.5/arch/powerpc/mm/init_64.c deleted file mode 100644 index 620b7acd..00000000 --- a/ANDROID_3.4.5/arch/powerpc/mm/init_64.c +++ /dev/null @@ -1,302 +0,0 @@ -/* - * PowerPC version - * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org) - * - * Modifications by Paul Mackerras (PowerMac) (paulus@cs.anu.edu.au) - * and Cort Dougan (PReP) (cort@cs.nmt.edu) - * Copyright (C) 1996 Paul Mackerras - * - * Derived from "arch/i386/mm/init.c" - * Copyright (C) 1991, 1992, 1993, 1994 Linus Torvalds - * - * Dave Engebretsen <engebret@us.ibm.com> - * Rework for PPC64 port. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - * - */ - -#undef DEBUG - -#include <linux/signal.h> -#include <linux/sched.h> -#include <linux/kernel.h> -#include <linux/errno.h> -#include <linux/string.h> -#include <linux/types.h> -#include <linux/mman.h> -#include <linux/mm.h> -#include <linux/swap.h> -#include <linux/stddef.h> -#include <linux/vmalloc.h> -#include <linux/init.h> -#include <linux/delay.h> -#include <linux/bootmem.h> -#include <linux/highmem.h> -#include <linux/idr.h> -#include <linux/nodemask.h> -#include <linux/module.h> -#include <linux/poison.h> -#include <linux/memblock.h> -#include <linux/hugetlb.h> -#include <linux/slab.h> - -#include <asm/pgalloc.h> -#include <asm/page.h> -#include <asm/prom.h> -#include <asm/rtas.h> -#include <asm/io.h> -#include <asm/mmu_context.h> -#include <asm/pgtable.h> -#include <asm/mmu.h> -#include <asm/uaccess.h> -#include <asm/smp.h> -#include <asm/machdep.h> -#include <asm/tlb.h> -#include <asm/eeh.h> -#include <asm/processor.h> -#include <asm/mmzone.h> -#include <asm/cputable.h> -#include <asm/sections.h> -#include <asm/iommu.h> -#include <asm/abs_addr.h> -#include <asm/vdso.h> - -#include "mmu_decl.h" - -#ifdef CONFIG_PPC_STD_MMU_64 -#if PGTABLE_RANGE > USER_VSID_RANGE -#warning Limited user VSID range means pagetable space is wasted -#endif - -#if (TASK_SIZE_USER64 < PGTABLE_RANGE) && (TASK_SIZE_USER64 < USER_VSID_RANGE) -#warning TASK_SIZE is smaller than it needs to be. -#endif -#endif /* CONFIG_PPC_STD_MMU_64 */ - -phys_addr_t memstart_addr = ~0; -EXPORT_SYMBOL_GPL(memstart_addr); -phys_addr_t kernstart_addr; -EXPORT_SYMBOL_GPL(kernstart_addr); - -static void pgd_ctor(void *addr) -{ - memset(addr, 0, PGD_TABLE_SIZE); -} - -static void pmd_ctor(void *addr) -{ - memset(addr, 0, PMD_TABLE_SIZE); -} - -struct kmem_cache *pgtable_cache[MAX_PGTABLE_INDEX_SIZE]; - -/* - * Create a kmem_cache() for pagetables. This is not used for PTE - * pages - they're linked to struct page, come from the normal free - * pages pool and have a different entry size (see real_pte_t) to - * everything else. Caches created by this function are used for all - * the higher level pagetables, and for hugepage pagetables. - */ -void pgtable_cache_add(unsigned shift, void (*ctor)(void *)) -{ - char *name; - unsigned long table_size = sizeof(void *) << shift; - unsigned long align = table_size; - - /* When batching pgtable pointers for RCU freeing, we store - * the index size in the low bits. Table alignment must be - * big enough to fit it. - * - * Likewise, hugeapge pagetable pointers contain a (different) - * shift value in the low bits. All tables must be aligned so - * as to leave enough 0 bits in the address to contain it. */ - unsigned long minalign = max(MAX_PGTABLE_INDEX_SIZE + 1, - HUGEPD_SHIFT_MASK + 1); - struct kmem_cache *new; - - /* It would be nice if this was a BUILD_BUG_ON(), but at the - * moment, gcc doesn't seem to recognize is_power_of_2 as a - * constant expression, so so much for that. */ - BUG_ON(!is_power_of_2(minalign)); - BUG_ON((shift < 1) || (shift > MAX_PGTABLE_INDEX_SIZE)); - - if (PGT_CACHE(shift)) - return; /* Already have a cache of this size */ - - align = max_t(unsigned long, align, minalign); - name = kasprintf(GFP_KERNEL, "pgtable-2^%d", shift); - new = kmem_cache_create(name, table_size, align, 0, ctor); - PGT_CACHE(shift) = new; - - pr_debug("Allocated pgtable cache for order %d\n", shift); -} - - -void pgtable_cache_init(void) -{ - pgtable_cache_add(PGD_INDEX_SIZE, pgd_ctor); - pgtable_cache_add(PMD_INDEX_SIZE, pmd_ctor); - if (!PGT_CACHE(PGD_INDEX_SIZE) || !PGT_CACHE(PMD_INDEX_SIZE)) - panic("Couldn't allocate pgtable caches"); - - /* In all current configs, when the PUD index exists it's the - * same size as either the pgd or pmd index. Verify that the - * initialization above has also created a PUD cache. This - * will need re-examiniation if we add new possibilities for - * the pagetable layout. */ - BUG_ON(PUD_INDEX_SIZE && !PGT_CACHE(PUD_INDEX_SIZE)); -} - -#ifdef CONFIG_SPARSEMEM_VMEMMAP -/* - * Given an address within the vmemmap, determine the pfn of the page that - * represents the start of the section it is within. Note that we have to - * do this by hand as the proffered address may not be correctly aligned. - * Subtraction of non-aligned pointers produces undefined results. - */ -static unsigned long __meminit vmemmap_section_start(unsigned long page) -{ - unsigned long offset = page - ((unsigned long)(vmemmap)); - - /* Return the pfn of the start of the section. */ - return (offset / sizeof(struct page)) & PAGE_SECTION_MASK; -} - -/* - * Check if this vmemmap page is already initialised. If any section - * which overlaps this vmemmap page is initialised then this page is - * initialised already. - */ -static int __meminit vmemmap_populated(unsigned long start, int page_size) -{ - unsigned long end = start + page_size; - - for (; start < end; start += (PAGES_PER_SECTION * sizeof(struct page))) - if (pfn_valid(vmemmap_section_start(start))) - return 1; - - return 0; -} - -/* On hash-based CPUs, the vmemmap is bolted in the hash table. - * - * On Book3E CPUs, the vmemmap is currently mapped in the top half of - * the vmalloc space using normal page tables, though the size of - * pages encoded in the PTEs can be different - */ - -#ifdef CONFIG_PPC_BOOK3E -static void __meminit vmemmap_create_mapping(unsigned long start, - unsigned long page_size, - unsigned long phys) -{ - /* Create a PTE encoding without page size */ - unsigned long i, flags = _PAGE_PRESENT | _PAGE_ACCESSED | - _PAGE_KERNEL_RW; - - /* PTEs only contain page size encodings up to 32M */ - BUG_ON(mmu_psize_defs[mmu_vmemmap_psize].enc > 0xf); - - /* Encode the size in the PTE */ - flags |= mmu_psize_defs[mmu_vmemmap_psize].enc << 8; - - /* For each PTE for that area, map things. Note that we don't - * increment phys because all PTEs are of the large size and - * thus must have the low bits clear - */ - for (i = 0; i < page_size; i += PAGE_SIZE) - BUG_ON(map_kernel_page(start + i, phys, flags)); -} -#else /* CONFIG_PPC_BOOK3E */ -static void __meminit vmemmap_create_mapping(unsigned long start, - unsigned long page_size, - unsigned long phys) -{ - int mapped = htab_bolt_mapping(start, start + page_size, phys, - PAGE_KERNEL, mmu_vmemmap_psize, - mmu_kernel_ssize); - BUG_ON(mapped < 0); -} -#endif /* CONFIG_PPC_BOOK3E */ - -struct vmemmap_backing *vmemmap_list; - -static __meminit struct vmemmap_backing * vmemmap_list_alloc(int node) -{ - static struct vmemmap_backing *next; - static int num_left; - - /* allocate a page when required and hand out chunks */ - if (!next || !num_left) { - next = vmemmap_alloc_block(PAGE_SIZE, node); - if (unlikely(!next)) { - WARN_ON(1); - return NULL; - } - num_left = PAGE_SIZE / sizeof(struct vmemmap_backing); - } - - num_left--; - - return next++; -} - -static __meminit void vmemmap_list_populate(unsigned long phys, - unsigned long start, - int node) -{ - struct vmemmap_backing *vmem_back; - - vmem_back = vmemmap_list_alloc(node); - if (unlikely(!vmem_back)) { - WARN_ON(1); - return; - } - - vmem_back->phys = phys; - vmem_back->virt_addr = start; - vmem_back->list = vmemmap_list; - - vmemmap_list = vmem_back; -} - -int __meminit vmemmap_populate(struct page *start_page, - unsigned long nr_pages, int node) -{ - unsigned long start = (unsigned long)start_page; - unsigned long end = (unsigned long)(start_page + nr_pages); - unsigned long page_size = 1 << mmu_psize_defs[mmu_vmemmap_psize].shift; - - /* Align to the page size of the linear mapping. */ - start = _ALIGN_DOWN(start, page_size); - - pr_debug("vmemmap_populate page %p, %ld pages, node %d\n", - start_page, nr_pages, node); - pr_debug(" -> map %lx..%lx\n", start, end); - - for (; start < end; start += page_size) { - void *p; - - if (vmemmap_populated(start, page_size)) - continue; - - p = vmemmap_alloc_block(page_size, node); - if (!p) - return -ENOMEM; - - vmemmap_list_populate(__pa(p), start, node); - - pr_debug(" * %016lx..%016lx allocated at %p\n", - start, start + page_size, p); - - vmemmap_create_mapping(start, page_size, __pa(p)); - } - - return 0; -} -#endif /* CONFIG_SPARSEMEM_VMEMMAP */ - |