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         printk("Free swap:       %6ldkB\n", nr_swap_pages<<(PAGE_SHIFT-10));
  31         i = max_mapnr;
  32         while (i-- > 0) {
  33                 total++;
  34                 if (PageReserved(mem_map+i))
  35                         reserved++;
  36                 else if (PageSwapCache(mem_map+i))
  37                         cached++;
  38                 else if (!page_count(mem_map+i))
  39                         free++;
  40                 else if (page_count(mem_map+i) == 1)
  41                         nonshared++;
  42                 else
  43                         shared += page_count(mem_map+i) - 1;
  44         }
  45         printk("%d pages of RAM\n",total);
  46         printk("%d free pages\n",free);
  47         printk("%d reserved pages\n",reserved);
  48         printk("%d pages nonshared\n",nonshared);
  49         printk("%d pages shared\n",shared);
  50         printk("%d pages swap cached\n",cached);
  51 }
  52
  53 void __init
  54 mem_init(void)
  55 {
  56         int codesize, reservedpages, datasize, initsize;
  57         unsigned long tmp;
  58
  59         if(!mem_map)
  60                 BUG();
  61
  62         /* max/min_low_pfn was set by setup.c
  63          * now we just copy it to some other necessary places...
  64          *
  65          * high_memory was also set in setup.c
  66          */
  67
  68         max_mapnr = num_physpages = max_low_pfn - min_low_pfn;
  69
  70         /* this will put all memory onto the freelists */
  71         totalram_pages = free_all_bootmem();
  72
  73         reservedpages = 0;
  74         for (tmp = 0; tmp < max_mapnr; tmp++) {
  75                 /*
  76                  * Only count reserved RAM pages
  77                  */
  78                 if (PageReserved(mem_map + tmp))
  79                         reservedpages++;
  80         }
  81
  82         codesize =  (unsigned long) &_etext - (unsigned long) &_stext;
  83         datasize =  (unsigned long) &_edata - (unsigned long) &_etext;
  84         initsize =  (unsigned long) &__init_end - (unsigned long) &__init_begin;
  85
  86         printk(KERN_INFO
  87                "Memory: %luk/%luk available (%dk kernel code, %dk reserved, %dk data, "
  88                "%dk init)\n" ,
  89                (unsigned long) nr_free_pages() << (PAGE_SHIFT-10),
  90                max_mapnr << (PAGE_SHIFT-10),
  91                codesize >> 10,
  92                reservedpages << (PAGE_SHIFT-10),
  93                datasize >> 10,
  94                initsize >> 10
  95                );
  96 }
  97
  98 /* free the pages occupied by initialization code */
  99
 100 void
 101 free_initmem(void)
 102 {
 103         unsigned long addr;
 104
 105         addr = (unsigned long)(&__init_begin);
 106         for (; addr < (unsigned long)(&__init_end); addr += PAGE_SIZE) {
 107                 ClearPageReserved(virt_to_page(addr));
 108                 init_page_count(virt_to_page(addr));
 109                 free_page(addr);
 110                 totalram_pages++;
 111         }
 112         printk (KERN_INFO "Freeing unused kernel memory: %luk freed\n",
 113                 (unsigned long)((&__init_end - &__init_begin) >> 10));
 114 }