1b6d06d820
sparc32 does not support fixmaps - so do not pretend so by having the fixmap.h file. Move relevant parts to vaddrs.h. I looked at simplifying this even more but failed to understand the reasoning behind the extra guard page involved and due to missing testing possibilities only the trivial conversion was done. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
70 lines
2 KiB
C
70 lines
2 KiB
C
#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_types.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_TYPE_NR * 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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