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Notes: @(#)param.h 13.1 (RC Computer) 91/02/02 */
Names: »param.h«
└─⟦50656ff4a⟧ Bits:30010538 TX 3.1 Coldstart
└─⟦bbf173f5c⟧ »0004«
└─⟦this⟧ »./usr/include/rc/param.h«
/* @(#)param.h 13.1 (RC Computer) 91/02/02 */
/*
* Machine dependent constants for RC9000.
*/
#ifndef __RC_PARAM
#define __RC_PARAM
#define NSLOTS 16 /* max number of slots in one pu */
#define SLOTSIZE 0x100 /* number of pages in one slot */
#define NBPG 4096 /* bytes/page */
#define PGOFSET (NBPG-1) /* byte offset into page */
#define PGSHIFT 12 /* LOG2(NBPG) */
#define DBSHIFT 10 /* LOG2(Disk block size) */
#define CLSIZE 1
#define CLSIZELOG2 0
#define SSIZE 1 /* initial stack size/NBPG */
#define SINCR 1 /* increment of stack/NBPG */
#define UPAGES 2 /* pages of u-area */
#define KERNELSTACK 0xffffe000 /* Top of kernel stack */
#define UADDR 0xffffc000 /* address of u */
#define UVPN (UADDR>>PGSHIFT)/* virtual page number of u */
/*
* Some macros for units conversion
*/
/* Core clicks (4096 bytes) to segments and vice versa */
#define ctos(x) (x)
#define stoc(x) (x)
/* Core clicks (4096 bytes) to disk blocks */
#define ctod(x) ((x)<<(PGSHIFT-DBSHIFT))
#define dtoc(x) ((unsigned)(x)>>(PGSHIFT-DBSHIFT))
#define dtob(x) ((x)<<DBSHIFT)
#define btod(x) ((unsigned)(x)>>DBSHIFT)
/* clicks to bytes */
#define ctob(x) ((x)<<PGSHIFT)
/* bytes to clicks */
#define btoc(x) (((unsigned)(x)+PGOFSET)>>PGSHIFT)
/*
* Macros to decode processor status word.
*/
#define USERMODE(sr) (((sr) & SR_KUP) == SR_KUP)
#define BASEPRI(sr) (((sr) & SR_IMASK) == SR_IMASK)
/*
* DELAY(n) should be n microseconds, roughly. This is a first guess.
*/
#ifdef SABLE
#define DELAY(n) { register int N = 3*(n); while (--N > 0); }
#else SABLE
#define DELAY(n) { \
extern int delay_mult; \
register int N = delay_mult*(n); \
while (--N > 0); \
}
#endif SABLE
#endif __RC_PARAM