vaddrs.h

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#ifndef _SPARC_VADDRS_H
#define _SPARC_VADDRS_H

#include <asm/head.h>

/*
 * asm/vaddrs.h:  Here we define the virtual addresses at
 *                      which important things will be mapped.
 *
 * Copyright (C) 1995 David S. Miller ([email protected])
 * Copyright (C) 2000 Anton Blanchard ([email protected])
 */

#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 */

#ifndef __ASSEMBLY__
#include <asm/kmap_types.h>

enum fixed_addresses {
    FIX_HOLE,
#ifdef CONFIG_HIGHMEM
    FIX_KMAP_BEGIN,
    FIX_KMAP_END = (KM_TYPE_NR * NR_CPUS),
#endif
    __end_of_fixed_addresses
};
#endif

/* Leave one empty page between IO pages at 0xfd000000 and
 * the top of the fixmap.
 */
#define FIXADDR_TOP     (0xfcfff000UL)
#define FIXADDR_SIZE        ((FIX_KMAP_END + 1) << PAGE_SHIFT)
#define FIXADDR_START       (FIXADDR_TOP - FIXADDR_SIZE)

#define __fix_to_virt(x)        (FIXADDR_TOP - ((x) << PAGE_SHIFT))

#define SUN4M_IOBASE_VADDR  0xfd000000 /* Base for mapping pages */
#define IOBASE_VADDR        0xfe000000
#define IOBASE_END      0xfe600000

#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) */