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/*
* Memory and machine-specific definitions. Used in C and assembler.
*/
/*
* Sizes
*/
#define BI2BY 8 /* bits per byte */
#define BI2WD 32 /* bits per word */
#define BY2WD 4 /* bytes per word */
#define BY2PG 4096 /* bytes per page */
#define WD2PG (BY2PG/BY2WD) /* words per page */
#define PGSHIFT 12 /* log(BY2PG) */
#define PGROUND(s) (((s)+(BY2PG-1))&~(BY2PG-1))
#define MAXMACH 1 /* max # cpus system can run */
/*
* Time
*/
#define HZ (20) /* clock frequency */
#define MS2HZ (1000/HZ) /* millisec per clock tick */
#define TK2SEC(t) ((t)/HZ) /* ticks to seconds */
#define TK2MS(t) ((((ulong)(t))*1000)/HZ) /* ticks to milliseconds */
#define MS2TK(t) ((((ulong)(t))*HZ)/1000) /* milliseconds to ticks */
/*
* Fundamental addresses
*/
/*
* Address spaces
*
* Kernel is at 0x00008000
*/
#define KZERO 0x00000000 /* base of kernel address space */
#define KTZERO KZERO /* first address in kernel text */
#define MACHSIZE 4096
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