LXR linux/arch/cris/mm/init.c

   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 *  linux/arch/cris/mm/init.c
   4 *
   5 *  Copyright (C) 1995  Linus Torvalds
   6 *  Copyright (C) 2000,2001  Axis Communications AB
   7 *
   8 *  Authors:  Bjorn Wesen (bjornw@axis.com)
   9 *
  10 */
  11
  12#include <linux/gfp.h>
  13#include <linux/init.h>
  14#include <linux/bootmem.h>
  15#include <linux/proc_fs.h>
  16#include <linux/kcore.h>
  17#include <asm/tlb.h>
  18#include <asm/sections.h>
  19
  20unsigned long empty_zero_page;
  21EXPORT_SYMBOL(empty_zero_page);
  22
  23void __init mem_init(void)
  24{
  25        BUG_ON(!mem_map);
  26
  27        /* max/min_low_pfn was set by setup.c
  28         * now we just copy it to some other necessary places...
  29         *
  30         * high_memory was also set in setup.c
  31         */
  32        max_mapnr = max_low_pfn - min_low_pfn;
  33        free_all_bootmem();
  34        mem_init_print_info(NULL);
  35}
  36
  37/* Free a range of init pages. Virtual addresses. */
  38
  39void free_init_pages(const char *what, unsigned long begin, unsigned long end)
  40{
  41        unsigned long addr;
  42
  43        for (addr = begin; addr < end; addr += PAGE_SIZE) {
  44                ClearPageReserved(virt_to_page(addr));
  45                init_page_count(virt_to_page(addr));
  46                free_page(addr);
  47                totalram_pages++;
  48        }
  49
  50        printk(KERN_INFO "Freeing %s: %ldk freed\n", what, (end - begin) >> 10);
  51}
  52
  53/* Free the pages occupied by initialization code. */
  54
  55void free_initmem(void)
  56{
  57        free_initmem_default(-1);
  58}
  59
  60/* Free the pages occupied by initrd code. */
  61
  62#ifdef CONFIG_BLK_DEV_INITRD
  63void free_initrd_mem(unsigned long start, unsigned long end)
  64{
  65        free_init_pages("initrd memory",
  66                        start,
  67                        end);
  68}
  69#endif
  70