Fix definitions to be in terms of a minimum number of constants by
using the SHIFT value as the basis for the other values, for example
instead of:
#define NBPG 4096
#define PGSHIFT 12
use:
#define PGSHIFT 12
#define NBPG (1 << PGSHIFT)
===================================================================
RCS file: /a/cvs/386BSD/src/sys/i386/include/param.h,v
retrieving revision 1.3
diff -c -r1.3 param.h
*** 1.3 1993/10/08 12:49:55
--- param.h 1993/10/08 12:53:19
***************
*** 52,76 ****
#define ALIGNBYTES (sizeof(int) - 1)
#define ALIGN(p) (((u_int)(p) + ALIGNBYTES) &~ ALIGNBYTES)
- #define NBPG 4096 /* bytes/page */
- #define PGOFSET (NBPG-1) /* byte offset into page */
#define PGSHIFT 12 /* LOG2(NBPG) */
#define NPTEPG (NBPG/(sizeof (struct pte)))
- #define NBPDR (1024*NBPG) /* bytes/page dir */
- #define PDROFSET (NBPDR-1) /* byte offset into page dir */
#define PDRSHIFT 22 /* LOG2(NBPDR) */
#define KERNBASE 0xFE000000 /* start of kernel virtual */
#define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT)
! #define DEV_BSIZE 512
#define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */
#define BLKDEV_IOSIZE 2048
#define MAXPHYS (64 * 1024) /* max raw I/O transfer size */
- #define CLSIZE 1
#define CLSIZELOG2 0
/* NOTE: SSIZE, SINCR and UPAGES must be multiples of CLSIZE */
#define SSIZE 1 /* initial stack size/NBPG */
--- 52,79 ----
#define ALIGNBYTES (sizeof(int) - 1)
#define ALIGN(p) (((u_int)(p) + ALIGNBYTES) &~ ALIGNBYTES)
#define PGSHIFT 12 /* LOG2(NBPG) */
+ #define NBPG (1 << PGSHIFT) /* bytes/page */
+ #define PGOFSET (NBPG-1) /* byte offset into page */
#define NPTEPG (NBPG/(sizeof (struct pte)))
#define PDRSHIFT 22 /* LOG2(NBPDR) */
+ #define NBPDR (1 << PDRSHIFT) /* bytes/page dir */
+ #define PDROFSET (NBPDR-1) /* byte offset into page dir */
#define KERNBASE 0xFE000000 /* start of kernel virtual */
#define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT)
! #define KERNSIZE 0x00C00000 /* size of kernel virtual */
!
#define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */
+ #define DEV_BSIZE (1 << DEV_BSHIFT)
+
#define BLKDEV_IOSIZE 2048
#define MAXPHYS (64 * 1024) /* max raw I/O transfer size */
#define CLSIZELOG2 0
+ #define CLSIZE (1 << CLSIZELOG2)
/* NOTE: SSIZE, SINCR and UPAGES must be multiples of CLSIZE */
#define SSIZE 1 /* initial stack size/NBPG */
***************
*** 92,99 ****
#ifndef MCLSHIFT
#define MCLSHIFT 11 /* convert bytes to m_buf clusters */
#endif /* MCLSHIFT */
! #define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */
! #define MCLOFSET (MCLBYTES - 1) /* offset within a m_buf cluster */
#ifndef NMBCLUSTERS
#ifdef GATEWAY
--- 95,102 ----
#ifndef MCLSHIFT
#define MCLSHIFT 11 /* convert bytes to m_buf clusters */
#endif /* MCLSHIFT */
! #define MCLBYTES (1 << MCLSHIFT) /* size of an m_buf cluster */
! #define MCLOFSET (MCLBYTES - 1) /* offset within an m_buf cluster */
#ifndef NMBCLUSTERS
#ifdef GATEWAY
UnifiedSplitRaw
