diff 1991/0710/pc/mem.h

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1991/0710/pc/mem.h (diff list | history)

1991/0709/sys/src/9/pc/mem.h:96,103 – 1991/0710/sys/src/9/pc/mem.h:96,114 (short | long | prev | next)
1991/0627
#define SEGD (1<<22) /* default 1==32bit (for code) */

1991/0706
/* * virtual MMU entries

1991/0710
* virtual MMU

1991/0706
*/ #define PTEMAPMEM (1024*1024) /* ??? */ #define SEGMAPSIZE 16 /* ??? */ #define PTEPERTAB (PTEMAPMEM/BY2PG) /* ??? */

1991/0710
/* * physical MMU */ #define PPN(x) ((x)&~(BY2PG-1)) #define PTEVALID (1<<0) #define PTEUNCACHED 0 /* everything is uncached */ #define PTEWRITE (1<<1) #define PTERONLY (0<<1) #define PTEKERNEL (0<<2) #define PTEUSER (1<<2)


`1991/0709/sys/src/9/pc/mem.h:96,103 – 1991/0710/sys/src/9/pc/mem.h:96,114` (short \| long \| prev \| next)
1991/0627		#define SEGD (1<<22) /* default 1==32bit (for code) */
1991/0706		/* * virtual MMU entries
1991/0710		* virtual MMU
1991/0706		/ #define PTEMAPMEM (10241024) /* ??? / #define SEGMAPSIZE 16 / ??? / #define PTEPERTAB (PTEMAPMEM/BY2PG) / ??? */
1991/0710		/* * physical MMU / #define PPN(x) ((x)&~(BY2PG-1)) #define PTEVALID (1<<0) #define PTEUNCACHED 0 / everything is uncached */ #define PTEWRITE (1<<1) #define PTERONLY (0<<1) #define PTEKERNEL (0<<2) #define PTEUSER (1<<2)