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 #define SUN4M_IOBASE_VADDR 0xfd000000 /* Base for mapping pages */ 34 #define IOBASE_VADDR 0xfe000000 35 #define IOBASE_END 0xfe600000 36 37 /* 38 * On the sun4/4c we need a place 39 * to reliably map locked down kernel data. This includes the 40 * task_struct and kernel stack pages of each process plus the 41 * scsi buffers during dvma IO transfers, also the floppy buffers 42 * during pseudo dma which runs with traps off (no faults allowed). 43 * Some quick calculations yield: 44 * NR_TASKS <512> * (3 * PAGE_SIZE) == 0x600000 45 * Subtract this from 0xc00000 and you get 0x927C0 of vm left 46 * over to map SCSI dvma + floppy pseudo-dma buffers. So be 47 * careful if you change NR_TASKS or else there won't be enough 48 * room for it all. 49 */ 50 #define SUN4C_LOCK_VADDR 0xff000000 51 #define SUN4C_LOCK_END 0xffc00000 52 53 #define KADB_DEBUGGER_BEGVM 0xffc00000 /* Where kern debugger is in virt-mem */ 54 #define KADB_DEBUGGER_ENDVM 0xffd00000 55 #define DEBUG_FIRSTVADDR KADB_DEBUGGER_BEGVM 56 #define DEBUG_LASTVADDR KADB_DEBUGGER_ENDVM 57 58 #define LINUX_OPPROM_BEGVM 0xffd00000 59 #define LINUX_OPPROM_ENDVM 0xfff00000 60 61 #define DVMA_VADDR 0xfff00000 /* Base area of the DVMA on suns */ 62 #define DVMA_END 0xfffc0000 63 64 #endif /* !(_SPARC_VADDRS_H) */ 65