include/asm-mips/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/config.h>
  19 #include <linux/types.h>
  20
  21 #include <asm/addrspace.h>
  22
  23 /*
  24  * PMAX/3MAX PROM entry points for DS2100/3100's and DS5000/2xx's.
  25  * Many of these will work for MIPSen as well!
  26  */
  27 #define VEC_RESET               (u64 *)KSEG1ADDR(0x1fc00000)
  28                                                         /* Prom base address */
  29
  30 #define PMAX_PROM_ENTRY(x)      (VEC_RESET + (x))       /* Prom jump table */
  31
  32 #define PMAX_PROM_HALT          PMAX_PROM_ENTRY(2)      /* valid on MIPSen */
  33 #define PMAX_PROM_AUTOBOOT      PMAX_PROM_ENTRY(5)      /* valid on MIPSen */
  34 #define PMAX_PROM_OPEN          PMAX_PROM_ENTRY(6)
  35 #define PMAX_PROM_READ          PMAX_PROM_ENTRY(7)
  36 #define PMAX_PROM_CLOSE         PMAX_PROM_ENTRY(10)
  37 #define PMAX_PROM_LSEEK         PMAX_PROM_ENTRY(11)
  38 #define PMAX_PROM_GETCHAR       PMAX_PROM_ENTRY(12)
  39 #define PMAX_PROM_PUTCHAR       PMAX_PROM_ENTRY(13)     /* 12 on MIPSen */
  40 #define PMAX_PROM_GETS          PMAX_PROM_ENTRY(15)
  41 #define PMAX_PROM_PRINTF        PMAX_PROM_ENTRY(17)
  42 #define PMAX_PROM_GETENV        PMAX_PROM_ENTRY(33)     /* valid on MIPSen */
  43
  44
  45 /*
  46  * Magic number indicating REX PROM available on DECstation.  Found in
  47  * register a2 on transfer of control to program from PROM.
  48  */
  49 #define REX_PROM_MAGIC          0x30464354
  50
  51 #ifdef CONFIG_MIPS64
  52
  53 #define prom_is_rex(magic)      1       /* KN04 and KN05 are REX PROMs.  */
  54
  55 #else /* !CONFIG_MIPS64 */
  56
  57 #define prom_is_rex(magic)      ((magic) == REX_PROM_MAGIC)
  58
  59 #endif /* !CONFIG_MIPS64 */
  60
  61
  62 /*
  63  * 3MIN/MAXINE PROM entry points for DS5000/1xx's, DS5000/xx's and
  64  * DS5000/2x0.
  65  */
  66 #define REX_PROM_GETBITMAP      0x84/4  /* get mem bitmap */
  67 #define REX_PROM_GETCHAR        0x24/4  /* getch() */
  68 #define REX_PROM_GETENV         0x64/4  /* get env. variable */
  69 #define REX_PROM_GETSYSID       0x80/4  /* get system id */
  70 #define REX_PROM_GETTCINFO      0xa4/4
  71 #define REX_PROM_PRINTF         0x30/4  /* printf() */
  72 #define REX_PROM_SLOTADDR       0x6c/4  /* slotaddr */
  73 #define REX_PROM_BOOTINIT       0x54/4  /* open() */
  74 #define REX_PROM_BOOTREAD       0x58/4  /* read() */
  75 #define REX_PROM_CLEARCACHE     0x7c/4
  76
  77
  78 /*
  79  * Used by rex_getbitmap().
  80  */
  81 typedef struct {
  82         int pagesize;
  83         unsigned char bitmap[0];
  84 } memmap;
  85
  86
  87 /*
  88  * Function pointers as read from a PROM's callback vector.
  89  */
  90 extern int (*__rex_bootinit)(void);
  91 extern int (*__rex_bootread)(void);
  92 extern int (*__rex_getbitmap)(memmap *);
  93 extern unsigned long *(*__rex_slot_address)(int);
  94 extern void *(*__rex_gettcinfo)(void);
  95 extern int (*__rex_getsysid)(void);
  96 extern void (*__rex_clear_cache)(void);
  97
  98 extern int (*__prom_getchar)(void);
  99 extern char *(*__prom_getenv)(char *);
 100 extern int (*__prom_printf)(char *, ...);
 101
 102 extern int (*__pmax_open)(char*, int);
 103 extern int (*__pmax_lseek)(int, long, int);
 104 extern int (*__pmax_read)(int, void *, int);
 105 extern int (*__pmax_close)(int);
 106
 107
 108 #ifdef CONFIG_MIPS64
 109
 110 /*
 111  * On MIPS64 we have to call PROM functions via a helper
 112  * dispatcher to accomodate ABI incompatibilities.
 113  */
 114 #define __DEC_PROM_O32 __attribute__((alias("call_o32")))
 115
 116 int _rex_bootinit(int (*)(void)) __DEC_PROM_O32;
 117 int _rex_bootread(int (*)(void)) __DEC_PROM_O32;
 118 int _rex_getbitmap(int (*)(memmap *), memmap *) __DEC_PROM_O32;
 119 unsigned long *_rex_slot_address(unsigned long *(*)(int), int) __DEC_PROM_O32;
 120 void *_rex_gettcinfo(void *(*)(void)) __DEC_PROM_O32;
 121 int _rex_getsysid(int (*)(void)) __DEC_PROM_O32;
 122 void _rex_clear_cache(void (*)(void)) __DEC_PROM_O32;
 123
 124 int _prom_getchar(int (*)(void)) __DEC_PROM_O32;
 125 char *_prom_getenv(char *(*)(char *), char *) __DEC_PROM_O32;
 126 int _prom_printf(int (*)(char *, ...), char *, ...) __DEC_PROM_O32;
 127
 128
 129 #define rex_bootinit()          _rex_bootinit(__rex_bootinit)
 130 #define rex_bootread()          _rex_bootread(__rex_bootread)
 131 #define rex_getbitmap(x)        _rex_getbitmap(__rex_getbitmap, x)
 132 #define rex_slot_address(x)     _rex_slot_address(__rex_slot_address, x)
 133 #define rex_gettcinfo()         _rex_gettcinfo(__rex_gettcinfo)
 134 #define rex_getsysid()          _rex_getsysid(__rex_getsysid)
 135 #define rex_clear_cache()       _rex_clear_cache(__rex_clear_cache)
 136
 137 #define prom_getchar()          _prom_getchar(__prom_getchar)
 138 #define prom_getenv(x)          _prom_getenv(__prom_getenv, x)
 139 #define prom_printf(x...)       _prom_printf(__prom_printf, x)
 140
 141 #else /* !CONFIG_MIPS64 */
 142
 143 /*
 144  * On plain MIPS we just call PROM functions directly.
 145  */
 146 #define rex_bootinit            __rex_bootinit
 147 #define rex_bootread            __rex_bootread
 148 #define rex_getbitmap           __rex_getbitmap
 149 #define rex_slot_address        __rex_slot_address
 150 #define rex_gettcinfo           __rex_gettcinfo
 151 #define rex_getsysid            __rex_getsysid
 152 #define rex_clear_cache         __rex_clear_cache
 153
 154 #define prom_getchar            __prom_getchar
 155 #define prom_getenv             __prom_getenv
 156 #define prom_printf             __prom_printf
 157
 158 #define pmax_open               __pmax_open
 159 #define pmax_lseek              __pmax_lseek
 160 #define pmax_read               __pmax_read
 161 #define pmax_close              __pmax_close
 162
 163 #endif /* !CONFIG_MIPS64 */
 164
 165
 166 extern void prom_meminit(u32);
 167 extern void prom_identify_arch(u32);
 168 extern void prom_init_cmdline(s32, s32 *, u32);
 169
 170 extern void register_prom_console(void);
 171 extern void unregister_prom_console(void);
 172
 173 #endif /* _ASM_DEC_PROM_H */