114 lines
2.9 KiB
C
114 lines
2.9 KiB
C
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/*
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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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/*
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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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int codek, datak;
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unsigned long tmp;
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unsigned long len = memory_end - memory_start;
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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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totalram_pages = free_all_bootmem();
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codek = (_etext - _stext) >> 10;
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datak = (_end - _sdata) >> 10;
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tmp = nr_free_pages() << PAGE_SHIFT;
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printk(KERN_INFO "Memory: %luk/%luk RAM (%dk kernel code, %dk data)\n",
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tmp >> 10, len >> 10, codek, datak);
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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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int pages = 0;
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for (; start < end; start += PAGE_SIZE) {
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ClearPageReserved(virt_to_page(start));
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init_page_count(virt_to_page(start));
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free_page(start);
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totalram_pages++;
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pages++;
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}
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printk(KERN_INFO "Freeing initrd memory: %luk freed\n",
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(pages * PAGE_SIZE) >> 10);
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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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unsigned long addr;
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/*
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* The following code should be cool even if these sections
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* are not page aligned.
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*/
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addr = PAGE_ALIGN((unsigned long)(__init_begin));
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/* next to check that the page we free is not a partial page */
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for (; addr + PAGE_SIZE < (unsigned long)(__init_end);
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addr += PAGE_SIZE) {
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ClearPageReserved(virt_to_page(addr));
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init_page_count(virt_to_page(addr));
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free_page(addr);
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totalram_pages++;
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}
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printk(KERN_INFO "Freeing unused kernel memory: %dK freed\n",
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(int) ((addr - PAGE_ALIGN((long) &__init_begin)) >> 10));
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}
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