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

1991/0710/sys/src/9/pc/mem.h:10,16 – 1991/0711/sys/src/9/pc/mem.h:10,16 (short | long | prev | next)
1991/0625		#define BY2WD 4 /* bytes per word */ #define BY2PG 4096 /* bytes per page */ #define WD2PG (BY2PG/BY2WD) /* words per page */ #define PGSHIFT 13 /* log(BY2PG) */
1991/0711		#define PGSHIFT 12 /* log(BY2PG) */
1991/0625		#define PGROUND(s) (((s)+(BY2PG-1))&~(BY2PG-1)) #define MAXMACH 1 /* max # cpus system can run */
1991/0710/sys/src/9/pc/mem.h:47,53 – 1991/0711/sys/src/9/pc/mem.h:47,53
1991/0625		#define MACHSIZE 4096 #define isphys(x) ((x)&KZERO)
1991/0711		#define isphys(x) (((ulong)x)&KZERO)
1991/0625
1991/0613		/*
1991/0706		* known 80386 segments (in GDT) and their selectors
1991/0710/sys/src/9/pc/mem.h:101,111 – 1991/0711/sys/src/9/pc/mem.h:101,111
1991/0706		#define PTEMAPMEM (1024*1024) /* ??? */ #define SEGMAPSIZE 16 /* ??? */ #define PTEPERTAB (PTEMAPMEM/BY2PG) /* ??? */
1991/0711		#define PPN(x) ((x)&~(BY2PG-1))
1991/0710		/* * physical MMU */ #define PPN(x) ((x)&~(BY2PG-1)) #define PTEVALID (1<<0) #define PTEUNCACHED 0 /* everything is uncached */ #define PTEWRITE (1<<1)