71 lines
2.3 KiB
C
71 lines
2.3 KiB
C
|
/* $Id: vaddrs.h,v 1.27 2001/07/04 00:18:18 davem Exp $ */
|
||
|
|
#ifndef _SPARC_VADDRS_H
|
||
|
|
#define _SPARC_VADDRS_H
|
||
|
|
|
||
|
|
#include <asm/head.h>
|
||
|
|
|
||
|
|
/*
|
||
|
|
* asm-sparc/vaddrs.h: Here we define the virtual addresses at
|
||
|
|
* which important things will be mapped.
|
||
|
|
*
|
||
|
|
* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
|
||
|
|
* Copyright (C) 2000 Anton Blanchard (anton@samba.org)
|
||
|
|
*/
|
||
|
|
|
||
|
|
#define SRMMU_MAXMEM 0x0c000000
|
||
|
|
|
||
|
|
#define SRMMU_NOCACHE_VADDR (KERNBASE + SRMMU_MAXMEM)
|
||
|
|
/* = 0x0fc000000 */
|
||
|
|
/* XXX Empiricals - this needs to go away - KMW */
|
||
|
|
#define SRMMU_MIN_NOCACHE_PAGES (550)
|
||
|
|
#define SRMMU_MAX_NOCACHE_PAGES (1280)
|
||
|
|
|
||
|
|
/* The following constant is used in mm/srmmu.c::srmmu_nocache_calcsize()
|
||
|
|
* to determine the amount of memory that will be reserved as nocache:
|
||
|
|
*
|
||
|
|
* 256 pages will be taken as nocache per each
|
||
|
|
* SRMMU_NOCACHE_ALCRATIO MB of system memory.
|
||
|
|
*
|
||
|
|
* limits enforced: nocache minimum = 256 pages
|
||
|
|
* nocache maximum = 1280 pages
|
||
|
|
*/
|
||
|
|
#define SRMMU_NOCACHE_ALCRATIO 64 /* 256 pages per 64MB of system RAM */
|
||
|
|
|
||
|
|
#define SUN4M_IOBASE_VADDR 0xfd000000 /* Base for mapping pages */
|
||
|
|
#define IOBASE_VADDR 0xfe000000
|
||
|
|
#define IOBASE_END 0xfe600000
|
||
|
|
|
||
|
|
#define VMALLOC_START 0xfe600000
|
||
|
|
|
||
|
|
/* XXX Alter this when I get around to fixing sun4c - Anton */
|
||
|
|
#define VMALLOC_END 0xffc00000
|
||
|
|
|
||
|
|
/*
|
||
|
|
* On the sun4/4c we need a place
|
||
|
|
* to reliably map locked down kernel data. This includes the
|
||
|
|
* task_struct and kernel stack pages of each process plus the
|
||
|
|
* scsi buffers during dvma IO transfers, also the floppy buffers
|
||
|
|
* during pseudo dma which runs with traps off (no faults allowed).
|
||
|
|
* Some quick calculations yield:
|
||
|
|
* NR_TASKS <512> * (3 * PAGE_SIZE) == 0x600000
|
||
|
|
* Subtract this from 0xc00000 and you get 0x927C0 of vm left
|
||
|
|
* over to map SCSI dvma + floppy pseudo-dma buffers. So be
|
||
|
|
* careful if you change NR_TASKS or else there won't be enough
|
||
|
|
* room for it all.
|
||
|
|
*/
|
||
|
|
#define SUN4C_LOCK_VADDR 0xff000000
|
||
|
|
#define SUN4C_LOCK_END 0xffc00000
|
||
|
|
|
||
|
|
#define KADB_DEBUGGER_BEGVM 0xffc00000 /* Where kern debugger is in virt-mem */
|
||
|
|
#define KADB_DEBUGGER_ENDVM 0xffd00000
|
||
|
|
#define DEBUG_FIRSTVADDR KADB_DEBUGGER_BEGVM
|
||
|
|
#define DEBUG_LASTVADDR KADB_DEBUGGER_ENDVM
|
||
|
|
|
||
|
|
#define LINUX_OPPROM_BEGVM 0xffd00000
|
||
|
|
#define LINUX_OPPROM_ENDVM 0xfff00000
|
||
|
|
|
||
|
|
#define DVMA_VADDR 0xfff00000 /* Base area of the DVMA on suns */
|
||
|
|
#define DVMA_END 0xfffc0000
|
||
|
|
|
||
|
|
#endif /* !(_SPARC_VADDRS_H) */
|