1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _SPARC_VADDRS_H 3 #define _SPARC_VADDRS_H 4 5 #include <asm/head.h> 6 7 /* 8 * asm/vaddrs.h: Here we define the virtual addresses at 9 * which important things will be mapped. 10 * 11 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) 12 * Copyright (C) 2000 Anton Blanchard (anton@samba.org) 13 */ 14 15 #define SRMMU_MAXMEM 0x0c000000 16 17 #define SRMMU_NOCACHE_VADDR (KERNBASE + SRMMU_MAXMEM) 18 /* = 0x0fc000000 */ 19 /* XXX Empiricals - this needs to go away - KMW */ 20 #define SRMMU_MIN_NOCACHE_PAGES (550) 21 #define SRMMU_MAX_NOCACHE_PAGES (1280) 22 23 /* The following constant is used in mm/srmmu.c::srmmu_nocache_calcsize() 24 * to determine the amount of memory that will be reserved as nocache: 25 * 26 * 256 pages will be taken as nocache per each 27 * SRMMU_NOCACHE_ALCRATIO MB of system memory. 28 * 29 * limits enforced: nocache minimum = 256 pages 30 * nocache maximum = 1280 pages 31 */ 32 #define SRMMU_NOCACHE_ALCRATIO 64 /* 256 pages per 64MB of system RAM */ 33 34 #ifndef __ASSEMBLY__ 35 #include <asm/kmap_types.h> 36 37 enum fixed_addresses { 38 FIX_HOLE, 39 #ifdef CONFIG_HIGHMEM 40 FIX_KMAP_BEGIN, 41 FIX_KMAP_END = (KM_TYPE_NR * NR_CPUS), 42 #endif 43 __end_of_fixed_addresses 44 }; 45 #endif 46 47 /* Leave one empty page between IO pages at 0xfd000000 and 48 * the top of the fixmap. 49 */ 50 #define FIXADDR_TOP (0xfcfff000UL) 51 #define FIXADDR_SIZE ((FIX_KMAP_END + 1) << PAGE_SHIFT) 52 #define FIXADDR_START (FIXADDR_TOP - FIXADDR_SIZE) 53 54 #define __fix_to_virt(x) (FIXADDR_TOP - ((x) << PAGE_SHIFT)) 55 56 #define SUN4M_IOBASE_VADDR 0xfd000000 /* Base for mapping pages */ 57 #define IOBASE_VADDR 0xfe000000 58 #define IOBASE_END 0xfe600000 59 60 #define KADB_DEBUGGER_BEGVM 0xffc00000 /* Where kern debugger is in virt-mem */ 61 #define KADB_DEBUGGER_ENDVM 0xffd00000 62 #define DEBUG_FIRSTVADDR KADB_DEBUGGER_BEGVM 63 #define DEBUG_LASTVADDR KADB_DEBUGGER_ENDVM 64 65 #define LINUX_OPPROM_BEGVM 0xffd00000 66 #define LINUX_OPPROM_ENDVM 0xfff00000 67 68 #define DVMA_VADDR 0xfff00000 /* Base area of the DVMA on suns */ 69 #define DVMA_END 0xfffc0000 70 71 #endif /* !(_SPARC_VADDRS_H) */ 72
