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#define SUN4M_IOBASE_VADDR	0xfd000000 /* Base for mapping pages */
34#define IOBASE_VADDR		0xfe000000
35#define IOBASE_END		0xfe600000
36
37/*
38 * On the sun4/4c we need a place
39 * to reliably map locked down kernel data.  This includes the
40 * task_struct and kernel stack pages of each process plus the
41 * scsi buffers during dvma IO transfers, also the floppy buffers
42 * during pseudo dma which runs with traps off (no faults allowed).
43 * Some quick calculations yield:
44 *       NR_TASKS <512> * (3 * PAGE_SIZE) == 0x600000
45 * Subtract this from 0xc00000 and you get 0x927C0 of vm left
46 * over to map SCSI dvma + floppy pseudo-dma buffers.  So be
47 * careful if you change NR_TASKS or else there won't be enough
48 * room for it all.
49 */
50#define SUN4C_LOCK_VADDR	0xff000000
51#define SUN4C_LOCK_END		0xffc00000
52
53#define KADB_DEBUGGER_BEGVM	0xffc00000 /* Where kern debugger is in virt-mem */
54#define KADB_DEBUGGER_ENDVM	0xffd00000
55#define DEBUG_FIRSTVADDR	KADB_DEBUGGER_BEGVM
56#define DEBUG_LASTVADDR		KADB_DEBUGGER_ENDVM
57
58#define LINUX_OPPROM_BEGVM	0xffd00000
59#define LINUX_OPPROM_ENDVM	0xfff00000
60
61#define DVMA_VADDR		0xfff00000 /* Base area of the DVMA on suns */
62#define DVMA_END		0xfffc0000
63
64#endif /* !(_SPARC_VADDRS_H) */

 1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef _SPARC_VADDRS_H
 3#define _SPARC_VADDRS_H
 4
 5#include <asm/head.h>
 6
 7/*
 8 * asm/vaddrs.h:  Here we define the virtual addresses at
 9 *                      which important things will be mapped.
10 *
11 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
12 * Copyright (C) 2000 Anton Blanchard (anton@samba.org)
13 */
14
15#define SRMMU_MAXMEM		0x0c000000
16
17#define SRMMU_NOCACHE_VADDR	(KERNBASE + SRMMU_MAXMEM)
18				/* = 0x0fc000000 */
19/* XXX Empiricals - this needs to go away - KMW */
20#define SRMMU_MIN_NOCACHE_PAGES (550)
21#define SRMMU_MAX_NOCACHE_PAGES	(1280)
22
23/* The following constant is used in mm/srmmu.c::srmmu_nocache_calcsize()
24 * to determine the amount of memory that will be reserved as nocache:
25 *
26 * 256 pages will be taken as nocache per each
27 * SRMMU_NOCACHE_ALCRATIO MB of system memory.
28 *
29 * limits enforced:	nocache minimum = 256 pages
30 *			nocache maximum = 1280 pages
31 */
32#define SRMMU_NOCACHE_ALCRATIO	64	/* 256 pages per 64MB of system RAM */
33
34#ifndef __ASSEMBLY__
35#include <asm/kmap_size.h>
36
37enum fixed_addresses {
38	FIX_HOLE,
39#ifdef CONFIG_HIGHMEM
40	FIX_KMAP_BEGIN,
41	FIX_KMAP_END = (KM_MAX_IDX * NR_CPUS),
42#endif
43	__end_of_fixed_addresses
44};
45#endif
46
47/* Leave one empty page between IO pages at 0xfd000000 and
48 * the top of the fixmap.
49 */
50#define FIXADDR_TOP		(0xfcfff000UL)
51#define FIXADDR_SIZE		((FIX_KMAP_END + 1) << PAGE_SHIFT)
52#define FIXADDR_START		(FIXADDR_TOP - FIXADDR_SIZE)
53
54#define __fix_to_virt(x)        (FIXADDR_TOP - ((x) << PAGE_SHIFT))
55
56#define SUN4M_IOBASE_VADDR	0xfd000000 /* Base for mapping pages */
57#define IOBASE_VADDR		0xfe000000
58#define IOBASE_END		0xfe600000
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
59
60#define KADB_DEBUGGER_BEGVM	0xffc00000 /* Where kern debugger is in virt-mem */
61#define KADB_DEBUGGER_ENDVM	0xffd00000
62#define DEBUG_FIRSTVADDR	KADB_DEBUGGER_BEGVM
63#define DEBUG_LASTVADDR		KADB_DEBUGGER_ENDVM
64
65#define LINUX_OPPROM_BEGVM	0xffd00000
66#define LINUX_OPPROM_ENDVM	0xfff00000
67
68#define DVMA_VADDR		0xfff00000 /* Base area of the DVMA on suns */
69#define DVMA_END		0xfffc0000
70
71#endif /* !(_SPARC_VADDRS_H) */