vaddrs.h
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- /* $Id: vaddrs.h,v 1.27 2001/07/04 00:18:18 davem Exp $ */
- #ifndef _SPARC_VADDRS_H
- #define _SPARC_VADDRS_H
- #include <asm/head.h>
- /*
- * asm-sparc/vaddrs.h: Here we define the virtual addresses at
- * which important things will be mapped.
- *
- * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
- * Copyright (C) 2000 Anton Blanchard (anton@samba.org)
- */
- #define SRMMU_MAXMEM 0x0c000000
- #define SRMMU_NOCACHE_VADDR (KERNBASE + SRMMU_MAXMEM)
- /* = 0x0fc000000 */
- /* The following constant is used in mm/srmmu.c::srmmu_nocache_calcsize()
- * to determine the amount of memory that will be reserved as nocache:
- *
- * 256 pages will be taken as nocache per each
- * SRMMU_NOCACHE_ALCRATIO MB of system memory.
- *
- * limits enforced: nocache minimum = 256 pages
- * nocache maximum = 1280 pages
- */
- #define SRMMU_NOCACHE_ALCRATIO 64 /* 256 pages per 64MB of system RAM */
- #define SUN4M_IOBASE_VADDR 0xfd000000 /* Base for mapping pages */
- #define IOBASE_VADDR 0xfe000000
- #define IOBASE_END 0xfe300000
- #define VMALLOC_START 0xfe300000
- /* XXX Alter this when I get around to fixing sun4c - Anton */
- #define VMALLOC_END 0xffc00000
- /*
- * On the sun4/4c we need a place
- * to reliably map locked down kernel data. This includes the
- * task_struct and kernel stack pages of each process plus the
- * scsi buffers during dvma IO transfers, also the floppy buffers
- * during pseudo dma which runs with traps off (no faults allowed).
- * Some quick calculations yield:
- * NR_TASKS <512> * (3 * PAGE_SIZE) == 0x600000
- * Subtract this from 0xc00000 and you get 0x927C0 of vm left
- * over to map SCSI dvma + floppy pseudo-dma buffers. So be
- * careful if you change NR_TASKS or else there won't be enough
- * room for it all.
- */
- #define SUN4C_LOCK_VADDR 0xff000000
- #define SUN4C_LOCK_END 0xffc00000
- #define KADB_DEBUGGER_BEGVM 0xffc00000 /* Where kern debugger is in virt-mem */
- #define KADB_DEBUGGER_ENDVM 0xffd00000
- #define DEBUG_FIRSTVADDR KADB_DEBUGGER_BEGVM
- #define DEBUG_LASTVADDR KADB_DEBUGGER_ENDVM
- #define LINUX_OPPROM_BEGVM 0xffd00000
- #define LINUX_OPPROM_ENDVM 0xfff00000
- #define DVMA_VADDR 0xfff00000 /* Base area of the DVMA on suns */
- #define DVMA_END 0xfffc0000
- #endif /* !(_SPARC_VADDRS_H) */