1#ifndef _SPARC_VADDRS_H 2#define _SPARC_VADDRS_H 3 4#include <asm/head.h> 5 6/* 7 * asm/vaddrs.h: Here we define the virtual addresses at 8 * which important things will be mapped. 9 * 10 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) 11 * Copyright (C) 2000 Anton Blanchard (anton@samba.org) 12 */ 13 14#define SRMMU_MAXMEM 0x0c000000 15 16#define SRMMU_NOCACHE_VADDR (KERNBASE + SRMMU_MAXMEM) 17 /* = 0x0fc000000 */ 18#define SRMMU_MIN_NOCACHE_PAGES (550) 19#define SRMMU_MAX_NOCACHE_PAGES (1280) 20 21/* The following constant is used in mm/srmmu.c::srmmu_nocache_calcsize() 22 * to determine the amount of memory that will be reserved as nocache: 23 * 24 * 256 pages will be taken as nocache per each 25 * SRMMU_NOCACHE_ALCRATIO MB of system memory. 26 * 27 * limits enforced: nocache minimum = 256 pages 28 * nocache maximum = 1280 pages 29 */ 30#define SRMMU_NOCACHE_ALCRATIO 64 /* 256 pages per 64MB of system RAM */ 31 32#define SUN4M_IOBASE_VADDR 0xfd000000 /* Base for mapping pages */ 33#define IOBASE_VADDR 0xfe000000 34#define IOBASE_END 0xfe600000 35 36/* 37 * On the sun4/4c we need a place 38 * to reliably map locked down kernel data. This includes the 39 * task_struct and kernel stack pages of each process plus the 40 * scsi buffers during dvma IO transfers, also the floppy buffers 41 * during pseudo dma which runs with traps off (no faults allowed). 42 * Some quick calculations yield: 43 * NR_TASKS <512> * (3 * PAGE_SIZE) == 0x600000 44 * Subtract this from 0xc00000 and you get 0x927C0 of vm left 45 * over to map SCSI dvma + floppy pseudo-dma buffers. So be 46 * careful if you change NR_TASKS or else there won't be enough 47 * room for it all. 48 */ 49#define SUN4C_LOCK_VADDR 0xff000000 50#define SUN4C_LOCK_END 0xffc00000 51 52#define KADB_DEBUGGER_BEGVM 0xffc00000 /* Where kern debugger is in virt-mem */ 53#define KADB_DEBUGGER_ENDVM 0xffd00000 54#define DEBUG_FIRSTVADDR KADB_DEBUGGER_BEGVM 55#define DEBUG_LASTVADDR KADB_DEBUGGER_ENDVM 56 57#define LINUX_OPPROM_BEGVM 0xffd00000 58#define LINUX_OPPROM_ENDVM 0xfff00000 59 60#define DVMA_VADDR 0xfff00000 /* Base area of the DVMA on suns */ 61#define DVMA_END 0xfffc0000 62 63#endif /* !(_SPARC_VADDRS_H) */ 64