diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/x86/mm/numa_32.c')
| -rw-r--r-- | ANDROID_3.4.5/arch/x86/mm/numa_32.c | 265 |
1 files changed, 0 insertions, 265 deletions
diff --git a/ANDROID_3.4.5/arch/x86/mm/numa_32.c b/ANDROID_3.4.5/arch/x86/mm/numa_32.c deleted file mode 100644 index 534255a3..00000000 --- a/ANDROID_3.4.5/arch/x86/mm/numa_32.c +++ /dev/null @@ -1,265 +0,0 @@ -/* - * Written by: Patricia Gaughen <gone@us.ibm.com>, IBM Corporation - * August 2002: added remote node KVA remap - Martin J. Bligh - * - * Copyright (C) 2002, IBM Corp. - * - * All rights reserved. - * - * 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. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or - * NON INFRINGEMENT. See the GNU General Public License for more - * details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - */ - -#include <linux/bootmem.h> -#include <linux/memblock.h> -#include <linux/module.h> - -#include "numa_internal.h" - -#ifdef CONFIG_DISCONTIGMEM -/* - * 4) physnode_map - the mapping between a pfn and owning node - * physnode_map keeps track of the physical memory layout of a generic - * numa node on a 64Mb break (each element of the array will - * represent 64Mb of memory and will be marked by the node id. so, - * if the first gig is on node 0, and the second gig is on node 1 - * physnode_map will contain: - * - * physnode_map[0-15] = 0; - * physnode_map[16-31] = 1; - * physnode_map[32- ] = -1; - */ -s8 physnode_map[MAX_SECTIONS] __read_mostly = { [0 ... (MAX_SECTIONS - 1)] = -1}; -EXPORT_SYMBOL(physnode_map); - -void memory_present(int nid, unsigned long start, unsigned long end) -{ - unsigned long pfn; - - printk(KERN_INFO "Node: %d, start_pfn: %lx, end_pfn: %lx\n", - nid, start, end); - printk(KERN_DEBUG " Setting physnode_map array to node %d for pfns:\n", nid); - printk(KERN_DEBUG " "); - for (pfn = start; pfn < end; pfn += PAGES_PER_SECTION) { - physnode_map[pfn / PAGES_PER_SECTION] = nid; - printk(KERN_CONT "%lx ", pfn); - } - printk(KERN_CONT "\n"); -} - -unsigned long node_memmap_size_bytes(int nid, unsigned long start_pfn, - unsigned long end_pfn) -{ - unsigned long nr_pages = end_pfn - start_pfn; - - if (!nr_pages) - return 0; - - return (nr_pages + 1) * sizeof(struct page); -} -#endif - -extern unsigned long highend_pfn, highstart_pfn; - -#define LARGE_PAGE_BYTES (PTRS_PER_PTE * PAGE_SIZE) - -static void *node_remap_start_vaddr[MAX_NUMNODES]; -void set_pmd_pfn(unsigned long vaddr, unsigned long pfn, pgprot_t flags); - -/* - * Remap memory allocator - */ -static unsigned long node_remap_start_pfn[MAX_NUMNODES]; -static void *node_remap_end_vaddr[MAX_NUMNODES]; -static void *node_remap_alloc_vaddr[MAX_NUMNODES]; - -/** - * alloc_remap - Allocate remapped memory - * @nid: NUMA node to allocate memory from - * @size: The size of allocation - * - * Allocate @size bytes from the remap area of NUMA node @nid. The - * size of the remap area is predetermined by init_alloc_remap() and - * only the callers considered there should call this function. For - * more info, please read the comment on top of init_alloc_remap(). - * - * The caller must be ready to handle allocation failure from this - * function and fall back to regular memory allocator in such cases. - * - * CONTEXT: - * Single CPU early boot context. - * - * RETURNS: - * Pointer to the allocated memory on success, %NULL on failure. - */ -void *alloc_remap(int nid, unsigned long size) -{ - void *allocation = node_remap_alloc_vaddr[nid]; - - size = ALIGN(size, L1_CACHE_BYTES); - - if (!allocation || (allocation + size) > node_remap_end_vaddr[nid]) - return NULL; - - node_remap_alloc_vaddr[nid] += size; - memset(allocation, 0, size); - - return allocation; -} - -#ifdef CONFIG_HIBERNATION -/** - * resume_map_numa_kva - add KVA mapping to the temporary page tables created - * during resume from hibernation - * @pgd_base - temporary resume page directory - */ -void resume_map_numa_kva(pgd_t *pgd_base) -{ - int node; - - for_each_online_node(node) { - unsigned long start_va, start_pfn, nr_pages, pfn; - - start_va = (unsigned long)node_remap_start_vaddr[node]; - start_pfn = node_remap_start_pfn[node]; - nr_pages = (node_remap_end_vaddr[node] - - node_remap_start_vaddr[node]) >> PAGE_SHIFT; - - printk(KERN_DEBUG "%s: node %d\n", __func__, node); - - for (pfn = 0; pfn < nr_pages; pfn += PTRS_PER_PTE) { - unsigned long vaddr = start_va + (pfn << PAGE_SHIFT); - pgd_t *pgd = pgd_base + pgd_index(vaddr); - pud_t *pud = pud_offset(pgd, vaddr); - pmd_t *pmd = pmd_offset(pud, vaddr); - - set_pmd(pmd, pfn_pmd(start_pfn + pfn, - PAGE_KERNEL_LARGE_EXEC)); - - printk(KERN_DEBUG "%s: %08lx -> pfn %08lx\n", - __func__, vaddr, start_pfn + pfn); - } - } -} -#endif - -/** - * init_alloc_remap - Initialize remap allocator for a NUMA node - * @nid: NUMA node to initizlie remap allocator for - * - * NUMA nodes may end up without any lowmem. As allocating pgdat and - * memmap on a different node with lowmem is inefficient, a special - * remap allocator is implemented which can be used by alloc_remap(). - * - * For each node, the amount of memory which will be necessary for - * pgdat and memmap is calculated and two memory areas of the size are - * allocated - one in the node and the other in lowmem; then, the area - * in the node is remapped to the lowmem area. - * - * As pgdat and memmap must be allocated in lowmem anyway, this - * doesn't waste lowmem address space; however, the actual lowmem - * which gets remapped over is wasted. The amount shouldn't be - * problematic on machines this feature will be used. - * - * Initialization failure isn't fatal. alloc_remap() is used - * opportunistically and the callers will fall back to other memory - * allocation mechanisms on failure. - */ -void __init init_alloc_remap(int nid, u64 start, u64 end) -{ - unsigned long start_pfn = start >> PAGE_SHIFT; - unsigned long end_pfn = end >> PAGE_SHIFT; - unsigned long size, pfn; - u64 node_pa, remap_pa; - void *remap_va; - - /* - * The acpi/srat node info can show hot-add memroy zones where - * memory could be added but not currently present. - */ - printk(KERN_DEBUG "node %d pfn: [%lx - %lx]\n", - nid, start_pfn, end_pfn); - - /* calculate the necessary space aligned to large page size */ - size = node_memmap_size_bytes(nid, start_pfn, end_pfn); - size += ALIGN(sizeof(pg_data_t), PAGE_SIZE); - size = ALIGN(size, LARGE_PAGE_BYTES); - - /* allocate node memory and the lowmem remap area */ - node_pa = memblock_find_in_range(start, end, size, LARGE_PAGE_BYTES); - if (!node_pa) { - pr_warning("remap_alloc: failed to allocate %lu bytes for node %d\n", - size, nid); - return; - } - memblock_reserve(node_pa, size); - - remap_pa = memblock_find_in_range(min_low_pfn << PAGE_SHIFT, - max_low_pfn << PAGE_SHIFT, - size, LARGE_PAGE_BYTES); - if (!remap_pa) { - pr_warning("remap_alloc: failed to allocate %lu bytes remap area for node %d\n", - size, nid); - memblock_free(node_pa, size); - return; - } - memblock_reserve(remap_pa, size); - remap_va = phys_to_virt(remap_pa); - - /* perform actual remap */ - for (pfn = 0; pfn < size >> PAGE_SHIFT; pfn += PTRS_PER_PTE) - set_pmd_pfn((unsigned long)remap_va + (pfn << PAGE_SHIFT), - (node_pa >> PAGE_SHIFT) + pfn, - PAGE_KERNEL_LARGE); - - /* initialize remap allocator parameters */ - node_remap_start_pfn[nid] = node_pa >> PAGE_SHIFT; - node_remap_start_vaddr[nid] = remap_va; - node_remap_end_vaddr[nid] = remap_va + size; - node_remap_alloc_vaddr[nid] = remap_va; - - printk(KERN_DEBUG "remap_alloc: node %d [%08llx-%08llx) -> [%p-%p)\n", - nid, node_pa, node_pa + size, remap_va, remap_va + size); -} - -void __init initmem_init(void) -{ - x86_numa_init(); - -#ifdef CONFIG_HIGHMEM - highstart_pfn = highend_pfn = max_pfn; - if (max_pfn > max_low_pfn) - highstart_pfn = max_low_pfn; - printk(KERN_NOTICE "%ldMB HIGHMEM available.\n", - pages_to_mb(highend_pfn - highstart_pfn)); - num_physpages = highend_pfn; - high_memory = (void *) __va(highstart_pfn * PAGE_SIZE - 1) + 1; -#else - num_physpages = max_low_pfn; - high_memory = (void *) __va(max_low_pfn * PAGE_SIZE - 1) + 1; -#endif - printk(KERN_NOTICE "%ldMB LOWMEM available.\n", - pages_to_mb(max_low_pfn)); - printk(KERN_DEBUG "max_low_pfn = %lx, highstart_pfn = %lx\n", - max_low_pfn, highstart_pfn); - - printk(KERN_DEBUG "Low memory ends at vaddr %08lx\n", - (ulong) pfn_to_kaddr(max_low_pfn)); - - printk(KERN_DEBUG "High memory starts at vaddr %08lx\n", - (ulong) pfn_to_kaddr(highstart_pfn)); - - setup_bootmem_allocator(); -} |