46 lines
1.1 KiB
C
46 lines
1.1 KiB
C
#ifndef _MM_H
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#define _MM_H
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#define PAGE_SIZE 4096
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#include <linux/kernel.h>
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#include <signal.h>
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extern int SWAP_DEV;
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#define read_swap_page(nr,buffer) ll_rw_page(READ,SWAP_DEV,(nr),(buffer));
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#define write_swap_page(nr,buffer) ll_rw_page(WRITE,SWAP_DEV,(nr),(buffer));
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extern unsigned long get_free_page(void);
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extern unsigned long put_dirty_page(unsigned long page,unsigned long address);
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extern void free_page(unsigned long addr);
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void swap_free(int page_nr);
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void swap_in(unsigned long *table_ptr);
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extern inline volatile void oom(void)
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{
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printk("out of memory\n\r");
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do_exit(SIGSEGV);
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}
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#define invalidate() \
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__asm__("movl %%eax,%%cr3"::"a" (0))
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/* these are not to be changed without changing head.s etc */
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#define LOW_MEM 0x100000
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extern unsigned long HIGH_MEMORY;
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#define PAGING_MEMORY (15*1024*1024)
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#define PAGING_PAGES (PAGING_MEMORY>>12)
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#define MAP_NR(addr) (((addr)-LOW_MEM)>>12)
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#define USED 100
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extern unsigned char mem_map [ PAGING_PAGES ];
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#define PAGE_DIRTY 0x40
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#define PAGE_ACCESSED 0x20
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#define PAGE_USER 0x04
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#define PAGE_RW 0x02
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#define PAGE_PRESENT 0x01
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#endif
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