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authorSrikant Patnaik2015-01-11 12:28:04 +0530
committerSrikant Patnaik2015-01-11 12:28:04 +0530
commit871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch)
tree8718f573808810c2a1e8cb8fb6ac469093ca2784 /ANDROID_3.4.5/arch/um/kernel/mem.c
parent9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff)
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Moved, renamed, and deleted files
The original directory structure was scattered and unorganized. Changes are basically to make it look like kernel structure.
Diffstat (limited to 'ANDROID_3.4.5/arch/um/kernel/mem.c')
-rw-r--r--ANDROID_3.4.5/arch/um/kernel/mem.c322
1 files changed, 0 insertions, 322 deletions
diff --git a/ANDROID_3.4.5/arch/um/kernel/mem.c b/ANDROID_3.4.5/arch/um/kernel/mem.c
deleted file mode 100644
index ebb86b21..00000000
--- a/ANDROID_3.4.5/arch/um/kernel/mem.c
+++ /dev/null
@@ -1,322 +0,0 @@
-/*
- * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
- * Licensed under the GPL
- */
-
-#include <linux/stddef.h>
-#include <linux/module.h>
-#include <linux/bootmem.h>
-#include <linux/highmem.h>
-#include <linux/mm.h>
-#include <linux/swap.h>
-#include <linux/slab.h>
-#include <asm/fixmap.h>
-#include <asm/page.h>
-#include "as-layout.h"
-#include "init.h"
-#include "kern.h"
-#include "kern_util.h"
-#include "mem_user.h"
-#include "os.h"
-
-/* allocated in paging_init, zeroed in mem_init, and unchanged thereafter */
-unsigned long *empty_zero_page = NULL;
-EXPORT_SYMBOL(empty_zero_page);
-/* allocated in paging_init and unchanged thereafter */
-static unsigned long *empty_bad_page = NULL;
-
-/*
- * Initialized during boot, and readonly for initializing page tables
- * afterwards
- */
-pgd_t swapper_pg_dir[PTRS_PER_PGD];
-
-/* Initialized at boot time, and readonly after that */
-unsigned long long highmem;
-int kmalloc_ok = 0;
-
-/* Used during early boot */
-static unsigned long brk_end;
-
-#ifdef CONFIG_HIGHMEM
-static void setup_highmem(unsigned long highmem_start,
- unsigned long highmem_len)
-{
- struct page *page;
- unsigned long highmem_pfn;
- int i;
-
- highmem_pfn = __pa(highmem_start) >> PAGE_SHIFT;
- for (i = 0; i < highmem_len >> PAGE_SHIFT; i++) {
- page = &mem_map[highmem_pfn + i];
- ClearPageReserved(page);
- init_page_count(page);
- __free_page(page);
- }
-}
-#endif
-
-void __init mem_init(void)
-{
- /* clear the zero-page */
- memset(empty_zero_page, 0, PAGE_SIZE);
-
- /* Map in the area just after the brk now that kmalloc is about
- * to be turned on.
- */
- brk_end = (unsigned long) UML_ROUND_UP(sbrk(0));
- map_memory(brk_end, __pa(brk_end), uml_reserved - brk_end, 1, 1, 0);
- free_bootmem(__pa(brk_end), uml_reserved - brk_end);
- uml_reserved = brk_end;
-
- /* this will put all low memory onto the freelists */
- totalram_pages = free_all_bootmem();
- max_low_pfn = totalram_pages;
-#ifdef CONFIG_HIGHMEM
- totalhigh_pages = highmem >> PAGE_SHIFT;
- totalram_pages += totalhigh_pages;
-#endif
- num_physpages = totalram_pages;
- max_pfn = totalram_pages;
- printk(KERN_INFO "Memory: %luk available\n",
- nr_free_pages() << (PAGE_SHIFT-10));
- kmalloc_ok = 1;
-
-#ifdef CONFIG_HIGHMEM
- setup_highmem(end_iomem, highmem);
-#endif
-}
-
-/*
- * Create a page table and place a pointer to it in a middle page
- * directory entry.
- */
-static void __init one_page_table_init(pmd_t *pmd)
-{
- if (pmd_none(*pmd)) {
- pte_t *pte = (pte_t *) alloc_bootmem_low_pages(PAGE_SIZE);
- set_pmd(pmd, __pmd(_KERNPG_TABLE +
- (unsigned long) __pa(pte)));
- if (pte != pte_offset_kernel(pmd, 0))
- BUG();
- }
-}
-
-static void __init one_md_table_init(pud_t *pud)
-{
-#ifdef CONFIG_3_LEVEL_PGTABLES
- pmd_t *pmd_table = (pmd_t *) alloc_bootmem_low_pages(PAGE_SIZE);
- set_pud(pud, __pud(_KERNPG_TABLE + (unsigned long) __pa(pmd_table)));
- if (pmd_table != pmd_offset(pud, 0))
- BUG();
-#endif
-}
-
-static void __init fixrange_init(unsigned long start, unsigned long end,
- pgd_t *pgd_base)
-{
- pgd_t *pgd;
- pud_t *pud;
- pmd_t *pmd;
- int i, j;
- unsigned long vaddr;
-
- vaddr = start;
- i = pgd_index(vaddr);
- j = pmd_index(vaddr);
- pgd = pgd_base + i;
-
- for ( ; (i < PTRS_PER_PGD) && (vaddr < end); pgd++, i++) {
- pud = pud_offset(pgd, vaddr);
- if (pud_none(*pud))
- one_md_table_init(pud);
- pmd = pmd_offset(pud, vaddr);
- for (; (j < PTRS_PER_PMD) && (vaddr < end); pmd++, j++) {
- one_page_table_init(pmd);
- vaddr += PMD_SIZE;
- }
- j = 0;
- }
-}
-
-#ifdef CONFIG_HIGHMEM
-pte_t *kmap_pte;
-pgprot_t kmap_prot;
-
-#define kmap_get_fixmap_pte(vaddr) \
- pte_offset_kernel(pmd_offset(pud_offset(pgd_offset_k(vaddr), (vaddr)),\
- (vaddr)), (vaddr))
-
-static void __init kmap_init(void)
-{
- unsigned long kmap_vstart;
-
- /* cache the first kmap pte */
- kmap_vstart = __fix_to_virt(FIX_KMAP_BEGIN);
- kmap_pte = kmap_get_fixmap_pte(kmap_vstart);
-
- kmap_prot = PAGE_KERNEL;
-}
-
-static void __init init_highmem(void)
-{
- pgd_t *pgd;
- pud_t *pud;
- pmd_t *pmd;
- pte_t *pte;
- unsigned long vaddr;
-
- /*
- * Permanent kmaps:
- */
- vaddr = PKMAP_BASE;
- fixrange_init(vaddr, vaddr + PAGE_SIZE*LAST_PKMAP, swapper_pg_dir);
-
- pgd = swapper_pg_dir + pgd_index(vaddr);
- pud = pud_offset(pgd, vaddr);
- pmd = pmd_offset(pud, vaddr);
- pte = pte_offset_kernel(pmd, vaddr);
- pkmap_page_table = pte;
-
- kmap_init();
-}
-#endif /* CONFIG_HIGHMEM */
-
-static void __init fixaddr_user_init( void)
-{
-#ifdef CONFIG_ARCH_REUSE_HOST_VSYSCALL_AREA
- long size = FIXADDR_USER_END - FIXADDR_USER_START;
- pgd_t *pgd;
- pud_t *pud;
- pmd_t *pmd;
- pte_t *pte;
- phys_t p;
- unsigned long v, vaddr = FIXADDR_USER_START;
-
- if (!size)
- return;
-
- fixrange_init( FIXADDR_USER_START, FIXADDR_USER_END, swapper_pg_dir);
- v = (unsigned long) alloc_bootmem_low_pages(size);
- memcpy((void *) v , (void *) FIXADDR_USER_START, size);
- p = __pa(v);
- for ( ; size > 0; size -= PAGE_SIZE, vaddr += PAGE_SIZE,
- p += PAGE_SIZE) {
- pgd = swapper_pg_dir + pgd_index(vaddr);
- pud = pud_offset(pgd, vaddr);
- pmd = pmd_offset(pud, vaddr);
- pte = pte_offset_kernel(pmd, vaddr);
- pte_set_val(*pte, p, PAGE_READONLY);
- }
-#endif
-}
-
-void __init paging_init(void)
-{
- unsigned long zones_size[MAX_NR_ZONES], vaddr;
- int i;
-
- empty_zero_page = (unsigned long *) alloc_bootmem_low_pages(PAGE_SIZE);
- empty_bad_page = (unsigned long *) alloc_bootmem_low_pages(PAGE_SIZE);
- for (i = 0; i < ARRAY_SIZE(zones_size); i++)
- zones_size[i] = 0;
-
- zones_size[ZONE_NORMAL] = (end_iomem >> PAGE_SHIFT) -
- (uml_physmem >> PAGE_SHIFT);
-#ifdef CONFIG_HIGHMEM
- zones_size[ZONE_HIGHMEM] = highmem >> PAGE_SHIFT;
-#endif
- free_area_init(zones_size);
-
- /*
- * Fixed mappings, only the page table structure has to be
- * created - mappings will be set by set_fixmap():
- */
- vaddr = __fix_to_virt(__end_of_fixed_addresses - 1) & PMD_MASK;
- fixrange_init(vaddr, FIXADDR_TOP, swapper_pg_dir);
-
- fixaddr_user_init();
-
-#ifdef CONFIG_HIGHMEM
- init_highmem();
-#endif
-}
-
-/*
- * This can't do anything because nothing in the kernel image can be freed
- * since it's not in kernel physical memory.
- */
-
-void free_initmem(void)
-{
-}
-
-#ifdef CONFIG_BLK_DEV_INITRD
-void free_initrd_mem(unsigned long start, unsigned long end)
-{
- if (start < end)
- printk(KERN_INFO "Freeing initrd memory: %ldk freed\n",
- (end - start) >> 10);
- for (; start < end; start += PAGE_SIZE) {
- ClearPageReserved(virt_to_page(start));
- init_page_count(virt_to_page(start));
- free_page(start);
- totalram_pages++;
- }
-}
-#endif
-
-/* Allocate and free page tables. */
-
-pgd_t *pgd_alloc(struct mm_struct *mm)
-{
- pgd_t *pgd = (pgd_t *)__get_free_page(GFP_KERNEL);
-
- if (pgd) {
- memset(pgd, 0, USER_PTRS_PER_PGD * sizeof(pgd_t));
- memcpy(pgd + USER_PTRS_PER_PGD,
- swapper_pg_dir + USER_PTRS_PER_PGD,
- (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
- }
- return pgd;
-}
-
-void pgd_free(struct mm_struct *mm, pgd_t *pgd)
-{
- free_page((unsigned long) pgd);
-}
-
-pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address)
-{
- pte_t *pte;
-
- pte = (pte_t *)__get_free_page(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO);
- return pte;
-}
-
-pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long address)
-{
- struct page *pte;
-
- pte = alloc_page(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO);
- if (pte)
- pgtable_page_ctor(pte);
- return pte;
-}
-
-#ifdef CONFIG_3_LEVEL_PGTABLES
-pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
-{
- pmd_t *pmd = (pmd_t *) __get_free_page(GFP_KERNEL);
-
- if (pmd)
- memset(pmd, 0, PAGE_SIZE);
-
- return pmd;
-}
-#endif
-
-void *uml_kmalloc(int size, int flags)
-{
- return kmalloc(size, flags);
-}