LXR linux/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 */
  80typedef 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 */
  89extern int (*__rex_bootinit)(void);
  90extern int (*__rex_bootread)(void);
  91extern int (*__rex_getbitmap)(memmap *);
  92extern unsigned long *(*__rex_slot_address)(int);
  93extern void *(*__rex_gettcinfo)(void);
  94extern int (*__rex_getsysid)(void);
  95extern void (*__rex_clear_cache)(void);
  96
  97extern int (*__prom_getchar)(void);
  98extern char *(*__prom_getenv)(char *);
  99extern int (*__prom_printf)(char *, ...);
 100
 101extern int (*__pmax_open)(char*, int);
 102extern int (*__pmax_lseek)(int, long, int);
 103extern int (*__pmax_read)(int, void *, int);
 104extern 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 accomodate ABI incompatibilities.
 112 */
 113#define __DEC_PROM_O32(fun, arg) fun arg __asm__(#fun); \
 114                                 __asm__(#fun " = call_o32")
 115
 116int __DEC_PROM_O32(_rex_bootinit, (int (*)(void)));
 117int __DEC_PROM_O32(_rex_bootread, (int (*)(void)));
 118int __DEC_PROM_O32(_rex_getbitmap, (int (*)(memmap *), memmap *));
 119unsigned long *__DEC_PROM_O32(_rex_slot_address,
 120                             (unsigned long *(*)(int), int));
 121void *__DEC_PROM_O32(_rex_gettcinfo, (void *(*)(void)));
 122int __DEC_PROM_O32(_rex_getsysid, (int (*)(void)));
 123void __DEC_PROM_O32(_rex_clear_cache, (void (*)(void)));
 124
 125int __DEC_PROM_O32(_prom_getchar, (int (*)(void)));
 126char *__DEC_PROM_O32(_prom_getenv, (char *(*)(char *), char *));
 127int __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
 167extern void prom_meminit(u32);
 168extern void prom_identify_arch(u32);
 169extern void prom_init_cmdline(s32, s32 *, u32);
 170
 171extern void register_prom_console(void);
 172extern void unregister_prom_console(void);
 173
 174#endif /* _ASM_DEC_PROM_H */
 175