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re-order to allow NBPG/PGSHIFT/PGOFSET to work always.

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This commit is contained in:
mrg 1996-08-28 03:01:27 +00:00
parent 97227d64b3
commit 358f853f46
1 changed files with 17 additions and 16 deletions
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33
sys/arch/sparc/include/param.h
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@ -1,4 +1,4 @@
/* $NetBSD: param.h,v 1.24 1996/05/15 02:13:48 mrg Exp $ */
/* $NetBSD: param.h,v 1.25 1996/08/28 03:01:27 mrg Exp $ */
/*
* Copyright (c) 1992, 1993
@ -75,30 +75,31 @@
* Three possible cases:
* sun4 only 8192 bytes/page
* sun4c/sun4m only 4096 bytes/page
* sun4/sun4c/sun4m either of the above
* any machine either of the above
*
* In the later case NBPG, PGOFSET, and PGSHIFT are encoded in variables
* initialized early in locore.s. Since they are variables, rather than
* simple constants, the kernel will not perform slighly worse.
* simple constants, the kernel will perform slighly worse.
*/
#if defined(SUN4) && !defined(SUN4C) && !defined(SUN4M)
#define NBPG 8192 /* bytes/page */
#define PGOFSET (NBPG-1) /* byte offset into page */
#define PGSHIFT SUN4_PGSHIFT /* log2(NBPG) */
# define NBPG 8192 /* bytes/page */
# define PGOFSET (NBPG-1) /* byte offset into page */
# define PGSHIFT SUN4_PGSHIFT /* log2(NBPG) */
#else
# if !defined(SUN4) && (defined(SUN4C) || defined(SUN4M))
# define NBPG 4096 /* bytes/page */
# define PGOFSET (NBPG-1) /* byte offset into page */
# define PGSHIFT SUN4CM_PGSHIFT /* log2(NBPG) */
# else
# define NBPG nbpg /* bytes/page */
# define PGOFSET pgofset /* byte offset into page */
# define PGSHIFT pgshift /* log2(NBPG) */
# endif
#endif
#if !defined(SUN4) && (defined(SUN4C) || defined(SUN4M))
#define NBPG 4096 /* bytes/page */
#define PGOFSET (NBPG-1) /* byte offset into page */
#define PGSHIFT SUN4CM_PGSHIFT /* log2(NBPG) */
#endif
#if defined(SUN4) && (defined(SUN4C) || defined(SUN4M))
#if defined(_KERNEL) && !defined(_LOCORE)
extern int nbpg, pgofset, pgshift;
#endif
#define NBPG nbpg /* bytes/page */
#define PGOFSET pgofset /* byte offset into page */
#define PGSHIFT pgshift /* log2(NBPG) */
#endif
#define KERNBASE 0xf8000000 /* start of kernel virtual space */
#define KERNTEXTOFF 0xf8004000 /* start of kernel text */