/* $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 */ /* XXX Empiricals - this needs to go away - KMW */ #define SRMMU_MIN_NOCACHE_PAGES (550) #define SRMMU_MAX_NOCACHE_PAGES (1280) /* 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 0xfe600000 #define VMALLOC_START 0xfe600000 /* 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) */