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71 lines
2.0 KiB
71 lines
2.0 KiB
/* 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 ([email protected]) |
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* Copyright (C) 2000 Anton Blanchard ([email protected]) |
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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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