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_MIPS_DEC_PROM_H 16#define __ASM_MIPS_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 *)KSEG1ADDR(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_MIPS64 51 52#define prom_is_rex(magic) 1 /* KN04 and KN05 are REX PROMs. */ 53 54#else /* !CONFIG_MIPS64 */ 55 56#define prom_is_rex(magic) ((magic) == REX_PROM_MAGIC) 57 58#endif /* !CONFIG_MIPS64 */ 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_MIPS64 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 __attribute__((alias("call_o32"))) 114 115int _rex_bootinit(int (*)(void)) __DEC_PROM_O32; 116int _rex_bootread(int (*)(void)) __DEC_PROM_O32; 117int _rex_getbitmap(int (*)(memmap *), memmap *) __DEC_PROM_O32; 118unsigned long *_rex_slot_address(unsigned long *(*)(int), int) __DEC_PROM_O32; 119void *_rex_gettcinfo(void *(*)(void)) __DEC_PROM_O32; 120int _rex_getsysid(int (*)(void)) __DEC_PROM_O32; 121void _rex_clear_cache(void (*)(void)) __DEC_PROM_O32; 122 123int _prom_getchar(int (*)(void)) __DEC_PROM_O32; 124char *_prom_getenv(char *(*)(char *), char *) __DEC_PROM_O32; 125int _prom_printf(int (*)(char *, ...), char *, ...) __DEC_PROM_O32; 126 127 128#define rex_bootinit() _rex_bootinit(__rex_bootinit) 129#define rex_bootread() _rex_bootread(__rex_bootread) 130#define rex_getbitmap(x) _rex_getbitmap(__rex_getbitmap, x) 131#define rex_slot_address(x) _rex_slot_address(__rex_slot_address, x) 132#define rex_gettcinfo() _rex_gettcinfo(__rex_gettcinfo) 133#define rex_getsysid() _rex_getsysid(__rex_getsysid) 134#define rex_clear_cache() _rex_clear_cache(__rex_clear_cache) 135 136#define prom_getchar() _prom_getchar(__prom_getchar) 137#define prom_getenv(x) _prom_getenv(__prom_getenv, x) 138#define prom_printf(x...) _prom_printf(__prom_printf, x) 139 140#else /* !CONFIG_MIPS64 */ 141 142/* 143 * On plain MIPS we just call PROM functions directly. 144 */ 145#define rex_bootinit __rex_bootinit 146#define rex_bootread __rex_bootread 147#define rex_getbitmap __rex_getbitmap 148#define rex_slot_address __rex_slot_address 149#define rex_gettcinfo __rex_gettcinfo 150#define rex_getsysid __rex_getsysid 151#define rex_clear_cache __rex_clear_cache 152 153#define prom_getchar __prom_getchar 154#define prom_getenv __prom_getenv 155#define prom_printf __prom_printf 156 157#define pmax_open __pmax_open 158#define pmax_lseek __pmax_lseek 159#define pmax_read __pmax_read 160#define pmax_close __pmax_close 161 162#endif /* !CONFIG_MIPS64 */ 163 164 165extern void prom_meminit(u32); 166extern void prom_identify_arch(u32); 167extern void prom_init_cmdline(s32, s32 *, u32); 168 169#endif /* __ASM_MIPS_DEC_PROM_H */ 170