arch/cris/mm/init.c

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