70 строки
1.5 KiB
C
70 строки
1.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* linux/arch/cris/mm/init.c
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*
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* Copyright (C) 1995 Linus Torvalds
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* Copyright (C) 2000,2001 Axis Communications AB
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*
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* Authors: Bjorn Wesen (bjornw@axis.com)
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*
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*/
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#include <linux/gfp.h>
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#include <linux/init.h>
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#include <linux/bootmem.h>
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#include <linux/proc_fs.h>
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#include <linux/kcore.h>
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#include <asm/tlb.h>
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#include <asm/sections.h>
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unsigned long empty_zero_page;
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EXPORT_SYMBOL(empty_zero_page);
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void __init mem_init(void)
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{
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BUG_ON(!mem_map);
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/* max/min_low_pfn was set by setup.c
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* now we just copy it to some other necessary places...
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*
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* high_memory was also set in setup.c
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*/
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max_mapnr = max_low_pfn - min_low_pfn;
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free_all_bootmem();
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mem_init_print_info(NULL);
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}
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/* Free a range of init pages. Virtual addresses. */
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void free_init_pages(const char *what, unsigned long begin, unsigned long end)
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{
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unsigned long addr;
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for (addr = begin; addr < end; 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 %s: %ldk freed\n", what, (end - begin) >> 10);
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}
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/* Free the pages occupied by initialization code. */
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void free_initmem(void)
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{
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free_initmem_default(-1);
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}
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/* Free the pages occupied by initrd code. */
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#ifdef CONFIG_BLK_DEV_INITRD
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void free_initrd_mem(unsigned long start, unsigned long end)
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{
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free_init_pages("initrd memory",
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start,
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end);
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}
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#endif
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