1991/0627/pc/mem.h (diff list | history)

1991/0625/sys/src/9/pc/mem.h:78,80 – 1991/0627/sys/src/9/pc/mem.h:78,97 (short | long | prev | next)
1991/0613		#define UDSEL SELECTOR(UDSEG, SELGDT, 3) #define USSEL SELECTOR(UDSEG, SELGDT, 3)
1991/0627		/* * fields in segment descriptors */ #define SEGDATA (0x10<<8) /* data/stack segment */ #define SEGEXEC (0x18<<8) /* executable segment */ #define SEGCG (0x0C<<8) /* call gate */ #define SEGIG (0x0E<<8) /* interrupt gate */ #define SEGTG (0x0F<<8) /* task gate */ #define SEGP (1<<15) /* segment present */ #define SEGPL(x) ((x)<<13) /* priority level */ #define SEGB (1<<22) /* granularity 1==4k (for expand-down) */ #define SEGG (1<<23) /* granularity 1==4k (for other) */ #define SEGE (1<<10) /* expand down */ #define SEGW (1<<9) /* writable (for data/stack) */ #define SEGR (1<<9) /* readable (for code) */ #define SEGD (1<<22) /* default 1==32bit (for code) */