root/include/linux/mm.h

/* */

INCLUDED FROM

DEFINITIONS

1. oom

   1 #ifndef _MM_H
   2 #define _MM_H
   3 
   4 #define PAGE_SIZE 4096
   5 
   6 #include <linux/fs.h>
   7 #include <linux/kernel.h>
   8 #include <signal.h>
   9 
  10 extern unsigned int swap_device;
  11 extern struct inode * swap_file;
  12 
  13 extern void rw_swap_page(int rw, unsigned int nr, char * buf);
  14 
  15 #define read_swap_page(nr,buf) \
  16         rw_swap_page(READ,(nr),(buf))
  17 #define write_swap_page(nr,buf) \
  18         rw_swap_page(WRITE,(nr),(buf))
  19 
  20 extern unsigned long get_free_page(void);
  21 extern unsigned long put_dirty_page(unsigned long page,unsigned long address);
  22 extern void free_page(unsigned long addr);
  23 void swap_free(int page_nr);
  24 void swap_in(unsigned long *table_ptr);
  25 
  26 extern inline volatile void oom(void)
     /*  */
  27 {
  28         printk("out of memory\n\r");
  29         do_exit(SIGSEGV);
  30 }
  31 
  32 #define invalidate() \
  33 __asm__("movl %%eax,%%cr3"::"a" (0))
  34 
  35 /* these are not to be changed without changing head.s etc */
  36 #define LOW_MEM 0x100000
  37 extern unsigned long HIGH_MEMORY;
  38 #define PAGING_MEMORY (15*1024*1024)
  39 #define PAGING_PAGES (PAGING_MEMORY>>12)
  40 #define MAP_NR(addr) (((addr)-LOW_MEM)>>12)
  41 #define USED 100
  42 
  43 extern unsigned char mem_map [ PAGING_PAGES ];
  44 
  45 #define PAGE_DIRTY      0x40
  46 #define PAGE_ACCESSED   0x20
  47 #define PAGE_USER       0x04
  48 #define PAGE_RW         0x02
  49 #define PAGE_PRESENT    0x01
  50 
  51 #endif

/* */