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79 lines
1.9 KiB
79 lines
1.9 KiB
/* |
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* Port on Texas Instruments TMS320C6x architecture |
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* |
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* Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated |
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* Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com) |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License version 2 as |
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* published by the Free Software Foundation. |
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*/ |
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#include <linux/mm.h> |
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#include <linux/swap.h> |
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#include <linux/module.h> |
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#include <linux/bootmem.h> |
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#ifdef CONFIG_BLK_DEV_RAM |
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#include <linux/blkdev.h> |
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#endif |
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#include <linux/initrd.h> |
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#include <asm/sections.h> |
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#include <asm/uaccess.h> |
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/* |
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* ZERO_PAGE is a special page that is used for zero-initialized |
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* data and COW. |
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*/ |
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unsigned long empty_zero_page; |
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EXPORT_SYMBOL(empty_zero_page); |
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/* |
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* paging_init() continues the virtual memory environment setup which |
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* was begun by the code in arch/head.S. |
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* The parameters are pointers to where to stick the starting and ending |
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* addresses of available kernel virtual memory. |
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*/ |
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void __init paging_init(void) |
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{ |
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struct pglist_data *pgdat = NODE_DATA(0); |
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unsigned long zones_size[MAX_NR_ZONES] = {0, }; |
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empty_zero_page = (unsigned long) alloc_bootmem_pages(PAGE_SIZE); |
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memset((void *)empty_zero_page, 0, PAGE_SIZE); |
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/* |
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* Set up user data space |
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*/ |
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set_fs(KERNEL_DS); |
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/* |
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* Define zones |
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*/ |
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zones_size[ZONE_NORMAL] = (memory_end - PAGE_OFFSET) >> PAGE_SHIFT; |
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pgdat->node_zones[ZONE_NORMAL].zone_start_pfn = |
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__pa(PAGE_OFFSET) >> PAGE_SHIFT; |
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free_area_init(zones_size); |
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} |
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void __init mem_init(void) |
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{ |
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high_memory = (void *)(memory_end & PAGE_MASK); |
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/* this will put all memory onto the freelists */ |
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free_all_bootmem(); |
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mem_init_print_info(NULL); |
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} |
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#ifdef CONFIG_BLK_DEV_INITRD |
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void __init free_initrd_mem(unsigned long start, unsigned long end) |
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{ |
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free_reserved_area((void *)start, (void *)end, -1, "initrd"); |
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} |
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#endif |
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void __init free_initmem(void) |
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{ |
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free_initmem_default(-1); |
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}
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