arch/sparc/include/asm/vaddrs.h

   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) */