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 */ 175