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/init.h>
  12 #include <linux/bootmem.h>
  13 #include <asm/tlb.h>
  14
  15 DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
  16
  17 unsigned long empty_zero_page;
  18
  19 extern char _stext, _edata, _etext; /* From linkerscript */
  20 extern char __init_begin, __init_end;
  21
  22 void
  23 show_mem(void)
  24 {
  25         int i,free = 0,total = 0,cached = 0, reserved = 0, nonshared = 0;
  26         int shared = 0;
  27
  28         printk("\nMem-info:\n");
  29         show_free_areas();
  30         i = max_mapnr;
  31         while (i-- > 0) {
  32                 total++;
  33                 if (PageReserved(mem_map+i))
  34                         reserved++;
  35                 else if (PageSwapCache(mem_map+i))
  36                         cached++;
  37                 else if (!page_count(mem_map+i))
  38                         free++;
  39                 else if (page_count(mem_map+i) == 1)
  40                         nonshared++;
  41                 else
  42                         shared += page_count(mem_map+i) - 1;
  43         }
  44         printk("%d pages of RAM\n",total);
  45         printk("%d free pages\n",free);
  46         printk("%d reserved pages\n",reserved);
  47         printk("%d pages nonshared\n",nonshared);
  48         printk("%d pages shared\n",shared);
  49         printk("%d pages swap cached\n",cached);
  50 }
  51
  52 void __init
  53 mem_init(void)
  54 {
  55         int codesize, reservedpages, datasize, initsize;
  56         unsigned long tmp;
  57
  58         if(!mem_map)
  59                 BUG();
  60
  61         /* max/min_low_pfn was set by setup.c
  62          * now we just copy it to some other necessary places...
  63          *
  64          * high_memory was also set in setup.c
  65          */
  66
  67         max_mapnr = num_physpages = max_low_pfn - min_low_pfn;
  68
  69         /* this will put all memory onto the freelists */
  70         totalram_pages = free_all_bootmem();
  71
  72         reservedpages = 0;
  73         for (tmp = 0; tmp < max_mapnr; tmp++) {
  74                 /*
  75                  * Only count reserved RAM pages
  76                  */
  77                 if (PageReserved(mem_map + tmp))
  78                         reservedpages++;
  79         }
  80
  81         codesize =  (unsigned long) &_etext - (unsigned long) &_stext;
  82         datasize =  (unsigned long) &_edata - (unsigned long) &_etext;
  83         initsize =  (unsigned long) &__init_end - (unsigned long) &__init_begin;
  84
  85         printk(KERN_INFO
  86                "Memory: %luk/%luk available (%dk kernel code, %dk reserved, %dk data, "
  87                "%dk init)\n" ,
  88                (unsigned long) nr_free_pages() << (PAGE_SHIFT-10),
  89                max_mapnr << (PAGE_SHIFT-10),
  90                codesize >> 10,
  91                reservedpages << (PAGE_SHIFT-10),
  92                datasize >> 10,
  93                initsize >> 10
  94                );
  95 }
  96
  97 /* free the pages occupied by initialization code */
  98
  99 void
 100 free_initmem(void)
 101 {
 102         unsigned long addr;
 103
 104         addr = (unsigned long)(&__init_begin);
 105         for (; addr < (unsigned long)(&__init_end); addr += PAGE_SIZE) {
 106                 ClearPageReserved(virt_to_page(addr));
 107                 init_page_count(virt_to_page(addr));
 108                 free_page(addr);
 109                 totalram_pages++;
 110         }
 111         printk (KERN_INFO "Freeing unused kernel memory: %luk freed\n",
 112                 (unsigned long)((&__init_end - &__init_begin) >> 10));
 113 }