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Define macros for encoding I/O space bits into the physical address 

passed to pmap_enter().
This commit is contained in:
pk 1997-05-24 19:59:25 +00:00
parent 8b0030a6fc
commit 957b6c1c18
1 changed files with 19 additions and 6 deletions
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25
sys/arch/sparc/include/pmap.h
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@ -1,4 +1,4 @@
/* $NetBSD: pmap.h,v 1.25 1997/05/16 21:35:43 gwr Exp $ */
/* $NetBSD: pmap.h,v 1.26 1997/05/24 19:59:25 pk Exp $ */
/*
* Copyright (c) 1996
@ -203,14 +203,27 @@ extern vm_offset_t vm_first_phys, vm_num_phys;
#define PMAP_VME16 2 /* etc */
#define PMAP_VME32 3 /* etc */
#define PMAP_NC 4 /* tells pmap_enter to set PG_NC */
#define PMAP_TNC_4 7 /* mask to get PG_TYPE & PG_NC */
#define PMAP_T2PTE_4(x) (((x) & PMAP_TNC_4) << PG_TNC_SHIFT)
#define PMAP_IOENC_4(io) (io)
/*
* On a SRMMU machine, the iospace is encoded in bits [3-6] of the
* physical address passed to pmap_enter().
*/
#define PMAP_TYPE_SRMMU 0x78 /* mask to get 4m page type */
#define PMAP_PTESHFT_SRMMU 25 /* right shift to put type in pte */
#define PMAP_SHFT_SRMMU 3 /* left shift to extract iospace */
#define PMAP_TNC_SRMMU 127 /* mask to get PG_TYPE & PG_NC */
#define PMAP_TYPE4M 0x78 /* mask to get 4m page type */
#define PMAP_PTESHFT4M 25 /* right shift to put type in pte */
#define PMAP_SHFT4M 0x3 /* left shift to extract type */
#define PMAP_TNC \
(CPU_ISSUN4M?127:7) /* mask to get PG_TYPE & PG_NC */
/*#define PMAP_IOC 0x00800000 -* IO cacheable, NOT shifted */
#define PMAP_T2PTE_SRMMU(x) (((x) & PMAP_TYPE_SRMMU) << PMAP_PTESHFT_SRMMU)
#define PMAP_IOENC_SRMMU(io) ((io) << PMAP_SHFT_SRMMU)
/* Encode IO space for pmap_enter() */
#define PMAP_IOENC(io) (CPU_ISSUN4M ? PMAP_IOENC_SRMMU(io) : PMAP_IOENC_4(io))
#if xxx
void pmap_bootstrap __P((int nmmu, int nctx, int nregion));