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 36 enum 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