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/* XXX Empiricals - this needs to go away - KMW */ 19#define SRMMU_MIN_NOCACHE_PAGES (550) 20#define SRMMU_MAX_NOCACHE_PAGES (1280) 21 22/* The following constant is used in mm/srmmu.c::srmmu_nocache_calcsize() 23 * to determine the amount of memory that will be reserved as nocache: 24 * 25 * 256 pages will be taken as nocache per each 26 * SRMMU_NOCACHE_ALCRATIO MB of system memory. 27 * 28 * limits enforced: nocache minimum = 256 pages 29 * nocache maximum = 1280 pages 30 */ 31#define SRMMU_NOCACHE_ALCRATIO 64 /* 256 pages per 64MB of system RAM */ 32 33#ifndef __ASSEMBLY__ 34#include <asm/kmap_types.h> 35 36enum fixed_addresses { 37 FIX_HOLE, 38#ifdef CONFIG_HIGHMEM 39 FIX_KMAP_BEGIN, 40 FIX_KMAP_END = (KM_TYPE_NR * NR_CPUS), 41#endif 42 __end_of_fixed_addresses 43}; 44#endif 45 46/* Leave one empty page between IO pages at 0xfd000000 and 47 * the top of the fixmap. 48 */ 49#define FIXADDR_TOP (0xfcfff000UL) 50#define FIXADDR_SIZE ((FIX_KMAP_END + 1) << PAGE_SHIFT) 51#define FIXADDR_START (FIXADDR_TOP - FIXADDR_SIZE) 52 53#define __fix_to_virt(x) (FIXADDR_TOP - ((x) << PAGE_SHIFT)) 54 55#define SUN4M_IOBASE_VADDR 0xfd000000 /* Base for mapping pages */ 56#define IOBASE_VADDR 0xfe000000 57#define IOBASE_END 0xfe600000 58 59#define KADB_DEBUGGER_BEGVM 0xffc00000 /* Where kern debugger is in virt-mem */ 60#define KADB_DEBUGGER_ENDVM 0xffd00000 61#define DEBUG_FIRSTVADDR KADB_DEBUGGER_BEGVM 62#define DEBUG_LASTVADDR KADB_DEBUGGER_ENDVM 63 64#define LINUX_OPPROM_BEGVM 0xffd00000 65#define LINUX_OPPROM_ENDVM 0xfff00000 66 67#define DVMA_VADDR 0xfff00000 /* Base area of the DVMA on suns */ 68#define DVMA_END 0xfffc0000 69 70#endif /* !(_SPARC_VADDRS_H) */ 71