diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/xtensa/mm/init.c')
| -rw-r--r-- | ANDROID_3.4.5/arch/xtensa/mm/init.c | 243 |
1 files changed, 0 insertions, 243 deletions
diff --git a/ANDROID_3.4.5/arch/xtensa/mm/init.c b/ANDROID_3.4.5/arch/xtensa/mm/init.c deleted file mode 100644 index ba150e5d..00000000 --- a/ANDROID_3.4.5/arch/xtensa/mm/init.c +++ /dev/null @@ -1,243 +0,0 @@ -/* - * arch/xtensa/mm/init.c - * - * Derived from MIPS, PPC. - * - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - * - * Copyright (C) 2001 - 2005 Tensilica Inc. - * - * Chris Zankel <chris@zankel.net> - * Joe Taylor <joe@tensilica.com, joetylr@yahoo.com> - * Marc Gauthier - * Kevin Chea - */ - -#include <linux/kernel.h> -#include <linux/errno.h> -#include <linux/bootmem.h> -#include <linux/gfp.h> -#include <linux/swap.h> -#include <linux/mman.h> -#include <linux/nodemask.h> -#include <linux/mm.h> - -#include <asm/bootparam.h> -#include <asm/page.h> - -/* References to section boundaries */ - -extern char _ftext, _etext, _fdata, _edata, _rodata_end; -extern char __init_begin, __init_end; - -/* - * mem_reserve(start, end, must_exist) - * - * Reserve some memory from the memory pool. - * - * Parameters: - * start Start of region, - * end End of region, - * must_exist Must exist in memory pool. - * - * Returns: - * 0 (memory area couldn't be mapped) - * -1 (success) - */ - -int __init mem_reserve(unsigned long start, unsigned long end, int must_exist) -{ - int i; - - if (start == end) - return 0; - - start = start & PAGE_MASK; - end = PAGE_ALIGN(end); - - for (i = 0; i < sysmem.nr_banks; i++) - if (start < sysmem.bank[i].end - && end >= sysmem.bank[i].start) - break; - - if (i == sysmem.nr_banks) { - if (must_exist) - printk (KERN_WARNING "mem_reserve: [0x%0lx, 0x%0lx) " - "not in any region!\n", start, end); - return 0; - } - - if (start > sysmem.bank[i].start) { - if (end < sysmem.bank[i].end) { - /* split entry */ - if (sysmem.nr_banks >= SYSMEM_BANKS_MAX) - panic("meminfo overflow\n"); - sysmem.bank[sysmem.nr_banks].start = end; - sysmem.bank[sysmem.nr_banks].end = sysmem.bank[i].end; - sysmem.nr_banks++; - } - sysmem.bank[i].end = start; - } else { - if (end < sysmem.bank[i].end) - sysmem.bank[i].start = end; - else { - /* remove entry */ - sysmem.nr_banks--; - sysmem.bank[i].start = sysmem.bank[sysmem.nr_banks].start; - sysmem.bank[i].end = sysmem.bank[sysmem.nr_banks].end; - } - } - return -1; -} - - -/* - * Initialize the bootmem system and give it all the memory we have available. - */ - -void __init bootmem_init(void) -{ - unsigned long pfn; - unsigned long bootmap_start, bootmap_size; - int i; - - max_low_pfn = max_pfn = 0; - min_low_pfn = ~0; - - for (i=0; i < sysmem.nr_banks; i++) { - pfn = PAGE_ALIGN(sysmem.bank[i].start) >> PAGE_SHIFT; - if (pfn < min_low_pfn) - min_low_pfn = pfn; - pfn = PAGE_ALIGN(sysmem.bank[i].end - 1) >> PAGE_SHIFT; - if (pfn > max_pfn) - max_pfn = pfn; - } - - if (min_low_pfn > max_pfn) - panic("No memory found!\n"); - - max_low_pfn = max_pfn < MAX_MEM_PFN >> PAGE_SHIFT ? - max_pfn : MAX_MEM_PFN >> PAGE_SHIFT; - - /* Find an area to use for the bootmem bitmap. */ - - bootmap_size = bootmem_bootmap_pages(max_low_pfn - min_low_pfn); - bootmap_size <<= PAGE_SHIFT; - bootmap_start = ~0; - - for (i=0; i<sysmem.nr_banks; i++) - if (sysmem.bank[i].end - sysmem.bank[i].start >= bootmap_size) { - bootmap_start = sysmem.bank[i].start; - break; - } - - if (bootmap_start == ~0UL) - panic("Cannot find %ld bytes for bootmap\n", bootmap_size); - - /* Reserve the bootmem bitmap area */ - - mem_reserve(bootmap_start, bootmap_start + bootmap_size, 1); - bootmap_size = init_bootmem_node(NODE_DATA(0), - bootmap_start >> PAGE_SHIFT, - min_low_pfn, - max_low_pfn); - - /* Add all remaining memory pieces into the bootmem map */ - - for (i=0; i<sysmem.nr_banks; i++) - free_bootmem(sysmem.bank[i].start, - sysmem.bank[i].end - sysmem.bank[i].start); - -} - - -void __init zones_init(void) -{ - unsigned long zones_size[MAX_NR_ZONES]; - int i; - - /* All pages are DMA-able, so we put them all in the DMA zone. */ - - zones_size[ZONE_DMA] = max_low_pfn - ARCH_PFN_OFFSET; - for (i = 1; i < MAX_NR_ZONES; i++) - zones_size[i] = 0; - -#ifdef CONFIG_HIGHMEM - zones_size[ZONE_HIGHMEM] = max_pfn - max_low_pfn; -#endif - - free_area_init_node(0, zones_size, ARCH_PFN_OFFSET, NULL); -} - -/* - * Initialize memory pages. - */ - -void __init mem_init(void) -{ - unsigned long codesize, reservedpages, datasize, initsize; - unsigned long highmemsize, tmp, ram; - - max_mapnr = num_physpages = max_low_pfn - ARCH_PFN_OFFSET; - high_memory = (void *) __va(max_low_pfn << PAGE_SHIFT); - highmemsize = 0; - -#ifdef CONFIG_HIGHMEM -#error HIGHGMEM not implemented in init.c -#endif - - totalram_pages += free_all_bootmem(); - - reservedpages = ram = 0; - for (tmp = 0; tmp < max_mapnr; tmp++) { - ram++; - if (PageReserved(mem_map+tmp)) - reservedpages++; - } - - codesize = (unsigned long) &_etext - (unsigned long) &_ftext; - datasize = (unsigned long) &_edata - (unsigned long) &_fdata; - initsize = (unsigned long) &__init_end - (unsigned long) &__init_begin; - - printk("Memory: %luk/%luk available (%ldk kernel code, %ldk reserved, " - "%ldk data, %ldk init %ldk highmem)\n", - nr_free_pages() << (PAGE_SHIFT-10), - ram << (PAGE_SHIFT-10), - codesize >> 10, - reservedpages << (PAGE_SHIFT-10), - datasize >> 10, - initsize >> 10, - highmemsize >> 10); -} - -void -free_reserved_mem(void *start, void *end) -{ - for (; start < end; start += PAGE_SIZE) { - ClearPageReserved(virt_to_page(start)); - init_page_count(virt_to_page(start)); - free_page((unsigned long)start); - totalram_pages++; - } -} - -#ifdef CONFIG_BLK_DEV_INITRD -extern int initrd_is_mapped; - -void free_initrd_mem(unsigned long start, unsigned long end) -{ - if (initrd_is_mapped) { - free_reserved_mem((void*)start, (void*)end); - printk ("Freeing initrd memory: %ldk freed\n",(end-start)>>10); - } -} -#endif - -void free_initmem(void) -{ - free_reserved_mem(&__init_begin, &__init_end); - printk("Freeing unused kernel memory: %dk freed\n", - (&__init_end - &__init_begin) >> 10); -} |