arch/mips/include/asm/dec/prom.h

   1 /*
   2  *      include/asm-mips/dec/prom.h
   3  *
   4  *      DECstation PROM interface.
   5  *
   6  *      Copyright (C) 2002  Maciej W. Rozycki
   7  *
   8  *      This program is free software; you can redistribute it and/or
   9  *      modify it under the terms of the GNU General Public License
  10  *      as published by the Free Software Foundation; either version
  11  *      2 of the License, or (at your option) any later version.
  12  *
  13  *      Based on arch/mips/dec/prom/prom.h by the Anonymous.
  14  */
  15 #ifndef _ASM_DEC_PROM_H
  16 #define _ASM_DEC_PROM_H
  17
  18 #include <linux/types.h>
  19
  20 #include <asm/addrspace.h>
  21
  22 /*
  23  * PMAX/3MAX PROM entry points for DS2100/3100's and DS5000/2xx's.
  24  * Many of these will work for MIPSen as well!
  25  */
  26 #define VEC_RESET               (u64 *)CKSEG1ADDR(0x1fc00000)
  27                                                         /* Prom base address */
  28
  29 #define PMAX_PROM_ENTRY(x)      (VEC_RESET + (x))       /* Prom jump table */
  30
  31 #define PMAX_PROM_HALT          PMAX_PROM_ENTRY(2)      /* valid on MIPSen */
  32 #define PMAX_PROM_AUTOBOOT      PMAX_PROM_ENTRY(5)      /* valid on MIPSen */
  33 #define PMAX_PROM_OPEN          PMAX_PROM_ENTRY(6)
  34 #define PMAX_PROM_READ          PMAX_PROM_ENTRY(7)
  35 #define PMAX_PROM_CLOSE         PMAX_PROM_ENTRY(10)
  36 #define PMAX_PROM_LSEEK         PMAX_PROM_ENTRY(11)
  37 #define PMAX_PROM_GETCHAR       PMAX_PROM_ENTRY(12)
  38 #define PMAX_PROM_PUTCHAR       PMAX_PROM_ENTRY(13)     /* 12 on MIPSen */
  39 #define PMAX_PROM_GETS          PMAX_PROM_ENTRY(15)
  40 #define PMAX_PROM_PRINTF        PMAX_PROM_ENTRY(17)
  41 #define PMAX_PROM_GETENV        PMAX_PROM_ENTRY(33)     /* valid on MIPSen */
  42
  43
  44 /*
  45  * Magic number indicating REX PROM available on DECstation.  Found in
  46  * register a2 on transfer of control to program from PROM.
  47  */
  48 #define REX_PROM_MAGIC          0x30464354
  49
  50 #ifdef CONFIG_64BIT
  51
  52 #define prom_is_rex(magic)      1       /* KN04 and KN05 are REX PROMs.  */
  53
  54 #else /* !CONFIG_64BIT */
  55
  56 #define prom_is_rex(magic)      ((magic) == REX_PROM_MAGIC)
  57
  58 #endif /* !CONFIG_64BIT */
  59
  60
  61 /*
  62  * 3MIN/MAXINE PROM entry points for DS5000/1xx's, DS5000/xx's and
  63  * DS5000/2x0.
  64  */
  65 #define REX_PROM_GETBITMAP      0x84/4  /* get mem bitmap */
  66 #define REX_PROM_GETCHAR        0x24/4  /* getch() */
  67 #define REX_PROM_GETENV         0x64/4  /* get env. variable */
  68 #define REX_PROM_GETSYSID       0x80/4  /* get system id */
  69 #define REX_PROM_GETTCINFO      0xa4/4
  70 #define REX_PROM_PRINTF         0x30/4  /* printf() */
  71 #define REX_PROM_SLOTADDR       0x6c/4  /* slotaddr */
  72 #define REX_PROM_BOOTINIT       0x54/4  /* open() */
  73 #define REX_PROM_BOOTREAD       0x58/4  /* read() */
  74 #define REX_PROM_CLEARCACHE     0x7c/4
  75
  76
  77 /*
  78  * Used by rex_getbitmap().
  79  */
  80 typedef struct {
  81         int pagesize;
  82         unsigned char bitmap[0];
  83 } memmap;
  84
  85
  86 /*
  87  * Function pointers as read from a PROM's callback vector.
  88  */
  89 extern int (*__rex_bootinit)(void);
  90 extern int (*__rex_bootread)(void);
  91 extern int (*__rex_getbitmap)(memmap *);
  92 extern unsigned long *(*__rex_slot_address)(int);
  93 extern void *(*__rex_gettcinfo)(void);
  94 extern int (*__rex_getsysid)(void);
  95 extern void (*__rex_clear_cache)(void);
  96
  97 extern int (*__prom_getchar)(void);
  98 extern char *(*__prom_getenv)(char *);
  99 extern int (*__prom_printf)(char *, ...);
 100
 101 extern int (*__pmax_open)(char*, int);
 102 extern int (*__pmax_lseek)(int, long, int);
 103 extern int (*__pmax_read)(int, void *, int);
 104 extern int (*__pmax_close)(int);
 105
 106
 107 #ifdef CONFIG_64BIT
 108
 109 /*
 110  * On MIPS64 we have to call PROM functions via a helper
 111  * dispatcher to accommodate ABI incompatibilities.
 112  */
 113 #define __DEC_PROM_O32(fun, arg) fun arg __asm__(#fun); \
 114                                  __asm__(#fun " = call_o32")
 115
 116 int __DEC_PROM_O32(_rex_bootinit, (int (*)(void)));
 117 int __DEC_PROM_O32(_rex_bootread, (int (*)(void)));
 118 int __DEC_PROM_O32(_rex_getbitmap, (int (*)(memmap *), memmap *));
 119 unsigned long *__DEC_PROM_O32(_rex_slot_address,
 120                              (unsigned long *(*)(int), int));
 121 void *__DEC_PROM_O32(_rex_gettcinfo, (void *(*)(void)));
 122 int __DEC_PROM_O32(_rex_getsysid, (int (*)(void)));
 123 void __DEC_PROM_O32(_rex_clear_cache, (void (*)(void)));
 124
 125 int __DEC_PROM_O32(_prom_getchar, (int (*)(void)));
 126 char *__DEC_PROM_O32(_prom_getenv, (char *(*)(char *), char *));
 127 int __DEC_PROM_O32(_prom_printf, (int (*)(char *, ...), char *, ...));
 128
 129
 130 #define rex_bootinit()          _rex_bootinit(__rex_bootinit)
 131 #define rex_bootread()          _rex_bootread(__rex_bootread)
 132 #define rex_getbitmap(x)        _rex_getbitmap(__rex_getbitmap, x)
 133 #define rex_slot_address(x)     _rex_slot_address(__rex_slot_address, x)
 134 #define rex_gettcinfo()         _rex_gettcinfo(__rex_gettcinfo)
 135 #define rex_getsysid()          _rex_getsysid(__rex_getsysid)
 136 #define rex_clear_cache()       _rex_clear_cache(__rex_clear_cache)
 137
 138 #define prom_getchar()          _prom_getchar(__prom_getchar)
 139 #define prom_getenv(x)          _prom_getenv(__prom_getenv, x)
 140 #define prom_printf(x...)       _prom_printf(__prom_printf, x)
 141
 142 #else /* !CONFIG_64BIT */
 143
 144 /*
 145  * On plain MIPS we just call PROM functions directly.
 146  */
 147 #define rex_bootinit            __rex_bootinit
 148 #define rex_bootread            __rex_bootread
 149 #define rex_getbitmap           __rex_getbitmap
 150 #define rex_slot_address        __rex_slot_address
 151 #define rex_gettcinfo           __rex_gettcinfo
 152 #define rex_getsysid            __rex_getsysid
 153 #define rex_clear_cache         __rex_clear_cache
 154
 155 #define prom_getchar            __prom_getchar
 156 #define prom_getenv             __prom_getenv
 157 #define prom_printf             __prom_printf
 158
 159 #define pmax_open               __pmax_open
 160 #define pmax_lseek              __pmax_lseek
 161 #define pmax_read               __pmax_read
 162 #define pmax_close              __pmax_close
 163
 164 #endif /* !CONFIG_64BIT */
 165
 166
 167 extern void prom_meminit(u32);
 168 extern void prom_identify_arch(u32);
 169 extern void prom_init_cmdline(s32, s32 *, u32);
 170
 171 extern void register_prom_console(void);
 172 extern void unregister_prom_console(void);
 173
 174 #endif /* _ASM_DEC_PROM_H */