72 lines
2.0 KiB
C
72 lines
2.0 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _SPARC_VADDRS_H
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#define _SPARC_VADDRS_H
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#include <asm/head.h>
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/*
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* asm/vaddrs.h: Here we define the virtual addresses at
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* which important things will be mapped.
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*
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* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
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* Copyright (C) 2000 Anton Blanchard (anton@samba.org)
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*/
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#define SRMMU_MAXMEM 0x0c000000
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#define SRMMU_NOCACHE_VADDR (KERNBASE + SRMMU_MAXMEM)
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/* = 0x0fc000000 */
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/* XXX Empiricals - this needs to go away - KMW */
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#define SRMMU_MIN_NOCACHE_PAGES (550)
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#define SRMMU_MAX_NOCACHE_PAGES (1280)
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/* The following constant is used in mm/srmmu.c::srmmu_nocache_calcsize()
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* to determine the amount of memory that will be reserved as nocache:
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*
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* 256 pages will be taken as nocache per each
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* SRMMU_NOCACHE_ALCRATIO MB of system memory.
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*
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* limits enforced: nocache minimum = 256 pages
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* nocache maximum = 1280 pages
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*/
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#define SRMMU_NOCACHE_ALCRATIO 64 /* 256 pages per 64MB of system RAM */
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#ifndef __ASSEMBLY__
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#include <asm/kmap_size.h>
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enum fixed_addresses {
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FIX_HOLE,
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#ifdef CONFIG_HIGHMEM
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FIX_KMAP_BEGIN,
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FIX_KMAP_END = (KM_MAX_IDX * NR_CPUS),
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#endif
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__end_of_fixed_addresses
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};
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#endif
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/* Leave one empty page between IO pages at 0xfd000000 and
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* the top of the fixmap.
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*/
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#define FIXADDR_TOP (0xfcfff000UL)
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#define FIXADDR_SIZE ((FIX_KMAP_END + 1) << PAGE_SHIFT)
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#define FIXADDR_START (FIXADDR_TOP - FIXADDR_SIZE)
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#define __fix_to_virt(x) (FIXADDR_TOP - ((x) << PAGE_SHIFT))
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#define SUN4M_IOBASE_VADDR 0xfd000000 /* Base for mapping pages */
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#define IOBASE_VADDR 0xfe000000
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#define IOBASE_END 0xfe600000
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#define KADB_DEBUGGER_BEGVM 0xffc00000 /* Where kern debugger is in virt-mem */
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#define KADB_DEBUGGER_ENDVM 0xffd00000
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#define DEBUG_FIRSTVADDR KADB_DEBUGGER_BEGVM
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#define DEBUG_LASTVADDR KADB_DEBUGGER_ENDVM
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#define LINUX_OPPROM_BEGVM 0xffd00000
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#define LINUX_OPPROM_ENDVM 0xfff00000
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#define DVMA_VADDR 0xfff00000 /* Base area of the DVMA on suns */
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#define DVMA_END 0xfffc0000
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#endif /* !(_SPARC_VADDRS_H) */
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