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/* * Port on Texas Instruments TMS320C6x architecture * * Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com) * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include <linux/mm.h> #include <linux/swap.h> #include <linux/module.h> #include <linux/bootmem.h> #ifdef CONFIG_BLK_DEV_RAM #include <linux/blkdev.h> #endif #include <linux/initrd.h> #include <asm/sections.h> /* * ZERO_PAGE is a special page that is used for zero-initialized * data and COW. */ unsigned long empty_zero_page; EXPORT_SYMBOL(empty_zero_page); /* * paging_init() continues the virtual memory environment setup which * was begun by the code in arch/head.S. * The parameters are pointers to where to stick the starting and ending * addresses of available kernel virtual memory. */ void __init paging_init(void) { struct pglist_data *pgdat = NODE_DATA(0); unsigned long zones_size[MAX_NR_ZONES] = {0, }; empty_zero_page = (unsigned long) alloc_bootmem_pages(PAGE_SIZE); memset((void *)empty_zero_page, 0, PAGE_SIZE); /* * Set up user data space */ set_fs(KERNEL_DS); /* * Define zones */ zones_size[ZONE_NORMAL] = (memory_end - PAGE_OFFSET) >> PAGE_SHIFT; pgdat->node_zones[ZONE_NORMAL].zone_start_pfn = __pa(PAGE_OFFSET) >> PAGE_SHIFT; free_area_init(zones_size); } void __init mem_init(void) { int codek, datak; unsigned long tmp; unsigned long len = memory_end - memory_start; high_memory = (void *)(memory_end & PAGE_MASK); /* this will put all memory onto the freelists */ totalram_pages = free_all_bootmem(); codek = (_etext - _stext) >> 10; datak = (_end - _sdata) >> 10; tmp = nr_free_pages() << PAGE_SHIFT; printk(KERN_INFO "Memory: %luk/%luk RAM (%dk kernel code, %dk data)\n", tmp >> 10, len >> 10, codek, datak); } #ifdef CONFIG_BLK_DEV_INITRD void __init free_initrd_mem(unsigned long start, unsigned long end) { int pages = 0; for (; start < end; start += PAGE_SIZE) { ClearPageReserved(virt_to_page(start)); init_page_count(virt_to_page(start)); free_page(start); totalram_pages++; pages++; } printk(KERN_INFO "Freeing initrd memory: %luk freed\n", (pages * PAGE_SIZE) >> 10); } #endif void __init free_initmem(void) { unsigned long addr; /* * The following code should be cool even if these sections * are not page aligned. */ addr = PAGE_ALIGN((unsigned long)(__init_begin)); /* next to check that the page we free is not a partial page */ for (; addr + PAGE_SIZE < (unsigned long)(__init_end); addr += PAGE_SIZE) { ClearPageReserved(virt_to_page(addr)); init_page_count(virt_to_page(addr)); free_page(addr); totalram_pages++; } printk(KERN_INFO "Freeing unused kernel memory: %dK freed\n", (int) ((addr - PAGE_ALIGN((long) &__init_begin)) >> 10)); }
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