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

   1/* SPDX-License-Identifier: GPL-2.0-or-later */
   2/*
   3 *      include/asm-mips/dec/prom.h
   4 *
   5 *      DECstation PROM interface.
   6 *
   7 *      Copyright (C) 2002  Maciej W. Rozycki
   8 *
   9 *      Based on arch/mips/dec/prom/prom.h by the Anonymous.
  10 */
  11#ifndef _ASM_DEC_PROM_H
  12#define _ASM_DEC_PROM_H
  13
  14#include <linux/types.h>
  15
  16#include <asm/addrspace.h>
  17
  18/*
  19 * PMAX/3MAX PROM entry points for DS2100/3100's and DS5000/2xx's.
  20 * Many of these will work for MIPSen as well!
  21 */
  22#define VEC_RESET               (u64 *)CKSEG1ADDR(0x1fc00000)
  23                                                        /* Prom base address */
  24
  25#define PMAX_PROM_ENTRY(x)      (VEC_RESET + (x))       /* Prom jump table */
  26
  27#define PMAX_PROM_HALT          PMAX_PROM_ENTRY(2)      /* valid on MIPSen */
  28#define PMAX_PROM_AUTOBOOT      PMAX_PROM_ENTRY(5)      /* valid on MIPSen */
  29#define PMAX_PROM_OPEN          PMAX_PROM_ENTRY(6)
  30#define PMAX_PROM_READ          PMAX_PROM_ENTRY(7)
  31#define PMAX_PROM_CLOSE         PMAX_PROM_ENTRY(10)
  32#define PMAX_PROM_LSEEK         PMAX_PROM_ENTRY(11)
  33#define PMAX_PROM_GETCHAR       PMAX_PROM_ENTRY(12)
  34#define PMAX_PROM_PUTCHAR       PMAX_PROM_ENTRY(13)     /* 12 on MIPSen */
  35#define PMAX_PROM_GETS          PMAX_PROM_ENTRY(15)
  36#define PMAX_PROM_PRINTF        PMAX_PROM_ENTRY(17)
  37#define PMAX_PROM_GETENV        PMAX_PROM_ENTRY(33)     /* valid on MIPSen */
  38
  39
  40/*
  41 * Magic number indicating REX PROM available on DECstation.  Found in
  42 * register a2 on transfer of control to program from PROM.
  43 */
  44#define REX_PROM_MAGIC          0x30464354
  45
  46#ifdef CONFIG_64BIT
  47
  48#define prom_is_rex(magic)      1       /* KN04 and KN05 are REX PROMs.  */
  49
  50#else /* !CONFIG_64BIT */
  51
  52#define prom_is_rex(magic)      ((magic) == REX_PROM_MAGIC)
  53
  54#endif /* !CONFIG_64BIT */
  55
  56
  57/*
  58 * 3MIN/MAXINE PROM entry points for DS5000/1xx's, DS5000/xx's and
  59 * DS5000/2x0.
  60 */
  61#define REX_PROM_GETBITMAP      0x84/4  /* get mem bitmap */
  62#define REX_PROM_GETCHAR        0x24/4  /* getch() */
  63#define REX_PROM_GETENV         0x64/4  /* get env. variable */
  64#define REX_PROM_GETSYSID       0x80/4  /* get system id */
  65#define REX_PROM_GETTCINFO      0xa4/4
  66#define REX_PROM_PRINTF         0x30/4  /* printf() */
  67#define REX_PROM_SLOTADDR       0x6c/4  /* slotaddr */
  68#define REX_PROM_BOOTINIT       0x54/4  /* open() */
  69#define REX_PROM_BOOTREAD       0x58/4  /* read() */
  70#define REX_PROM_CLEARCACHE     0x7c/4
  71
  72
  73/*
  74 * Used by rex_getbitmap().
  75 */
  76typedef struct {
  77        int pagesize;
  78        unsigned char bitmap[0];
  79} memmap;
  80
  81
  82/*
  83 * Function pointers as read from a PROM's callback vector.
  84 */
  85extern int (*__rex_bootinit)(void);
  86extern int (*__rex_bootread)(void);
  87extern int (*__rex_getbitmap)(memmap *);
  88extern unsigned long *(*__rex_slot_address)(int);
  89extern void *(*__rex_gettcinfo)(void);
  90extern int (*__rex_getsysid)(void);
  91extern void (*__rex_clear_cache)(void);
  92
  93extern int (*__prom_getchar)(void);
  94extern char *(*__prom_getenv)(char *);
  95extern int (*__prom_printf)(char *, ...);
  96
  97extern int (*__pmax_open)(char*, int);
  98extern int (*__pmax_lseek)(int, long, int);
  99extern int (*__pmax_read)(int, void *, int);
 100extern int (*__pmax_close)(int);
 101
 102
 103#ifdef CONFIG_64BIT
 104
 105/*
 106 * On MIPS64 we have to call PROM functions via a helper
 107 * dispatcher to accommodate ABI incompatibilities.
 108 */
 109#define __DEC_PROM_O32(fun, arg) fun arg __asm__(#fun); \
 110                                 __asm__(#fun " = call_o32")
 111
 112int __DEC_PROM_O32(_rex_bootinit, (int (*)(void), void *));
 113int __DEC_PROM_O32(_rex_bootread, (int (*)(void), void *));
 114int __DEC_PROM_O32(_rex_getbitmap, (int (*)(memmap *), void *, memmap *));
 115unsigned long *__DEC_PROM_O32(_rex_slot_address,
 116                             (unsigned long *(*)(int), void *, int));
 117void *__DEC_PROM_O32(_rex_gettcinfo, (void *(*)(void), void *));
 118int __DEC_PROM_O32(_rex_getsysid, (int (*)(void), void *));
 119void __DEC_PROM_O32(_rex_clear_cache, (void (*)(void), void *));
 120
 121int __DEC_PROM_O32(_prom_getchar, (int (*)(void), void *));
 122char *__DEC_PROM_O32(_prom_getenv, (char *(*)(char *), void *, char *));
 123int __DEC_PROM_O32(_prom_printf, (int (*)(char *, ...), void *, char *, ...));
 124
 125
 126#define rex_bootinit()          _rex_bootinit(__rex_bootinit, NULL)
 127#define rex_bootread()          _rex_bootread(__rex_bootread, NULL)
 128#define rex_getbitmap(x)        _rex_getbitmap(__rex_getbitmap, NULL, x)
 129#define rex_slot_address(x)     _rex_slot_address(__rex_slot_address, NULL, x)
 130#define rex_gettcinfo()         _rex_gettcinfo(__rex_gettcinfo, NULL)
 131#define rex_getsysid()          _rex_getsysid(__rex_getsysid, NULL)
 132#define rex_clear_cache()       _rex_clear_cache(__rex_clear_cache, NULL)
 133
 134#define prom_getchar()          _prom_getchar(__prom_getchar, NULL)
 135#define prom_getenv(x)          _prom_getenv(__prom_getenv, NULL, x)
 136#define prom_printf(x...)       _prom_printf(__prom_printf, NULL, x)
 137
 138#else /* !CONFIG_64BIT */
 139
 140/*
 141 * On plain MIPS we just call PROM functions directly.
 142 */
 143#define rex_bootinit            __rex_bootinit
 144#define rex_bootread            __rex_bootread
 145#define rex_getbitmap           __rex_getbitmap
 146#define rex_slot_address        __rex_slot_address
 147#define rex_gettcinfo           __rex_gettcinfo
 148#define rex_getsysid            __rex_getsysid
 149#define rex_clear_cache         __rex_clear_cache
 150
 151#define prom_getchar            __prom_getchar
 152#define prom_getenv             __prom_getenv
 153#define prom_printf             __prom_printf
 154
 155#define pmax_open               __pmax_open
 156#define pmax_lseek              __pmax_lseek
 157#define pmax_read               __pmax_read
 158#define pmax_close              __pmax_close
 159
 160#endif /* !CONFIG_64BIT */
 161
 162
 163extern void prom_meminit(u32);
 164extern void prom_identify_arch(u32);
 165extern void prom_init_cmdline(s32, s32 *, u32);
 166
 167extern void register_prom_console(void);
 168extern void unregister_prom_console(void);
 169
 170#endif /* _ASM_DEC_PROM_H */
 171