1#ifndef _SPARC_VADDRS_H
2#define _SPARC_VADDRS_H
3
4#include <asm/head.h>
5
6/*
7 * asm/vaddrs.h:  Here we define the virtual addresses at
8 *                      which important things will be mapped.
9 *
10 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
11 * Copyright (C) 2000 Anton Blanchard (anton@samba.org)
12 */
13
14#define SRMMU_MAXMEM		0x0c000000
15
16#define SRMMU_NOCACHE_VADDR	(KERNBASE + SRMMU_MAXMEM)
17				/* = 0x0fc000000 */
18/* XXX Empiricals - this needs to go away - KMW */
19#define SRMMU_MIN_NOCACHE_PAGES (550)
20#define SRMMU_MAX_NOCACHE_PAGES	(1280)
21
22/* The following constant is used in mm/srmmu.c::srmmu_nocache_calcsize()
23 * to determine the amount of memory that will be reserved as nocache:
24 *
25 * 256 pages will be taken as nocache per each
26 * SRMMU_NOCACHE_ALCRATIO MB of system memory.
27 *
28 * limits enforced:	nocache minimum = 256 pages
29 *			nocache maximum = 1280 pages
30 */
31#define SRMMU_NOCACHE_ALCRATIO	64	/* 256 pages per 64MB of system RAM */
32
33#ifndef __ASSEMBLY__
34#include <asm/kmap_types.h>
35
36enum fixed_addresses {
37	FIX_HOLE,
38#ifdef CONFIG_HIGHMEM
39	FIX_KMAP_BEGIN,
40	FIX_KMAP_END = (KM_TYPE_NR * NR_CPUS),
41#endif
42	__end_of_fixed_addresses
43};
44#endif
45
46/* Leave one empty page between IO pages at 0xfd000000 and
47 * the top of the fixmap.
48 */
49#define FIXADDR_TOP		(0xfcfff000UL)
50#define FIXADDR_SIZE		((FIX_KMAP_END + 1) << PAGE_SHIFT)
51#define FIXADDR_START		(FIXADDR_TOP - FIXADDR_SIZE)
52
53#define __fix_to_virt(x)        (FIXADDR_TOP - ((x) << PAGE_SHIFT))
54
55#define SUN4M_IOBASE_VADDR	0xfd000000 /* Base for mapping pages */
56#define IOBASE_VADDR		0xfe000000
57#define IOBASE_END		0xfe600000
58
59#define KADB_DEBUGGER_BEGVM	0xffc00000 /* Where kern debugger is in virt-mem */
60#define KADB_DEBUGGER_ENDVM	0xffd00000
61#define DEBUG_FIRSTVADDR	KADB_DEBUGGER_BEGVM
62#define DEBUG_LASTVADDR		KADB_DEBUGGER_ENDVM
63
64#define LINUX_OPPROM_BEGVM	0xffd00000
65#define LINUX_OPPROM_ENDVM	0xfff00000
66
67#define DVMA_VADDR		0xfff00000 /* Base area of the DVMA on suns */
68#define DVMA_END		0xfffc0000
69
70#endif /* !(_SPARC_VADDRS_H) */
71