71 lines
2.3 KiB
C
71 lines
2.3 KiB
C
/* $Id: vaddrs.h,v 1.27 2001/07/04 00:18:18 davem Exp $ */
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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-sparc/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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#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 VMALLOC_START 0xfe600000
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/* XXX Alter this when I get around to fixing sun4c - Anton */
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#define VMALLOC_END 0xffc00000
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/*
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* On the sun4/4c we need a place
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* to reliably map locked down kernel data. This includes the
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* task_struct and kernel stack pages of each process plus the
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* scsi buffers during dvma IO transfers, also the floppy buffers
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* during pseudo dma which runs with traps off (no faults allowed).
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* Some quick calculations yield:
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* NR_TASKS <512> * (3 * PAGE_SIZE) == 0x600000
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* Subtract this from 0xc00000 and you get 0x927C0 of vm left
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* over to map SCSI dvma + floppy pseudo-dma buffers. So be
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* careful if you change NR_TASKS or else there won't be enough
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* room for it all.
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*/
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#define SUN4C_LOCK_VADDR 0xff000000
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#define SUN4C_LOCK_END 0xffc00000
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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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