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 <asm/tlb.h>
  15 #include <asm/sections.h>
  16
  17 unsigned long empty_zero_page;
  18
  19 void __init
  20 mem_init(void)
  21 {
  22         int codesize, reservedpages, datasize, initsize;
  23         unsigned long tmp;
  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
  33         max_mapnr = num_physpages = max_low_pfn - min_low_pfn;
  34
  35         /* this will put all memory onto the freelists */
  36         totalram_pages = free_all_bootmem();
  37
  38         reservedpages = 0;
  39         for (tmp = 0; tmp < max_mapnr; tmp++) {
  40                 /*
  41                  * Only count reserved RAM pages
  42                  */
  43                 if (PageReserved(mem_map + tmp))
  44                         reservedpages++;
  45         }
  46
  47         codesize =  (unsigned long) &_etext - (unsigned long) &_stext;
  48         datasize =  (unsigned long) &_edata - (unsigned long) &_etext;
  49         initsize =  (unsigned long) &__init_end - (unsigned long) &__init_begin;
  50
  51         printk(KERN_INFO
  52                "Memory: %luk/%luk available (%dk kernel code, %dk reserved, %dk data, "
  53                "%dk init)\n" ,
  54                nr_free_pages() << (PAGE_SHIFT-10),
  55                max_mapnr << (PAGE_SHIFT-10),
  56                codesize >> 10,
  57                reservedpages << (PAGE_SHIFT-10),
  58                datasize >> 10,
  59                initsize >> 10
  60                );
  61 }
  62
  63 /* free the pages occupied by initialization code */
  64
  65 void
  66 free_initmem(void)
  67 {
  68         free_initmem_default(0);
  69 }