prom.h (5251B)
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/* KN04 and KN05 are REX PROMs, so only do the check for R3k systems. */ 47static inline bool prom_is_rex(u32 magic) 48{ 49 return !IS_ENABLED(CONFIG_CPU_R3000) || magic == REX_PROM_MAGIC; 50} 51 52/* 53 * 3MIN/MAXINE PROM entry points for DS5000/1xx's, DS5000/xx's and 54 * DS5000/2x0. 55 */ 56#define REX_PROM_GETBITMAP 0x84/4 /* get mem bitmap */ 57#define REX_PROM_GETCHAR 0x24/4 /* getch() */ 58#define REX_PROM_GETENV 0x64/4 /* get env. variable */ 59#define REX_PROM_GETSYSID 0x80/4 /* get system id */ 60#define REX_PROM_GETTCINFO 0xa4/4 61#define REX_PROM_PRINTF 0x30/4 /* printf() */ 62#define REX_PROM_SLOTADDR 0x6c/4 /* slotaddr */ 63#define REX_PROM_BOOTINIT 0x54/4 /* open() */ 64#define REX_PROM_BOOTREAD 0x58/4 /* read() */ 65#define REX_PROM_CLEARCACHE 0x7c/4 66 67 68/* 69 * Used by rex_getbitmap(). 70 */ 71typedef struct { 72 int pagesize; 73 unsigned char bitmap[0]; 74} memmap; 75 76 77/* 78 * Function pointers as read from a PROM's callback vector. 79 */ 80extern int (*__rex_bootinit)(void); 81extern int (*__rex_bootread)(void); 82extern int (*__rex_getbitmap)(memmap *); 83extern unsigned long *(*__rex_slot_address)(int); 84extern void *(*__rex_gettcinfo)(void); 85extern int (*__rex_getsysid)(void); 86extern void (*__rex_clear_cache)(void); 87 88extern int (*__prom_getchar)(void); 89extern char *(*__prom_getenv)(char *); 90extern int (*__prom_printf)(char *, ...); 91 92extern int (*__pmax_open)(char*, int); 93extern int (*__pmax_lseek)(int, long, int); 94extern int (*__pmax_read)(int, void *, int); 95extern int (*__pmax_close)(int); 96 97 98#ifdef CONFIG_64BIT 99 100/* 101 * On MIPS64 we have to call PROM functions via a helper 102 * dispatcher to accommodate ABI incompatibilities. 103 */ 104#define __DEC_PROM_O32(fun, arg) fun arg __asm__(#fun); \ 105 __asm__(#fun " = call_o32") 106 107int __DEC_PROM_O32(_rex_bootinit, (int (*)(void), void *)); 108int __DEC_PROM_O32(_rex_bootread, (int (*)(void), void *)); 109int __DEC_PROM_O32(_rex_getbitmap, (int (*)(memmap *), void *, memmap *)); 110unsigned long *__DEC_PROM_O32(_rex_slot_address, 111 (unsigned long *(*)(int), void *, int)); 112void *__DEC_PROM_O32(_rex_gettcinfo, (void *(*)(void), void *)); 113int __DEC_PROM_O32(_rex_getsysid, (int (*)(void), void *)); 114void __DEC_PROM_O32(_rex_clear_cache, (void (*)(void), void *)); 115 116int __DEC_PROM_O32(_prom_getchar, (int (*)(void), void *)); 117char *__DEC_PROM_O32(_prom_getenv, (char *(*)(char *), void *, char *)); 118int __DEC_PROM_O32(_prom_printf, (int (*)(char *, ...), void *, char *, ...)); 119 120 121#define rex_bootinit() _rex_bootinit(__rex_bootinit, NULL) 122#define rex_bootread() _rex_bootread(__rex_bootread, NULL) 123#define rex_getbitmap(x) _rex_getbitmap(__rex_getbitmap, NULL, x) 124#define rex_slot_address(x) _rex_slot_address(__rex_slot_address, NULL, x) 125#define rex_gettcinfo() _rex_gettcinfo(__rex_gettcinfo, NULL) 126#define rex_getsysid() _rex_getsysid(__rex_getsysid, NULL) 127#define rex_clear_cache() _rex_clear_cache(__rex_clear_cache, NULL) 128 129#define prom_getchar() _prom_getchar(__prom_getchar, NULL) 130#define prom_getenv(x) _prom_getenv(__prom_getenv, NULL, x) 131#define prom_printf(x...) _prom_printf(__prom_printf, NULL, x) 132 133#else /* !CONFIG_64BIT */ 134 135/* 136 * On plain MIPS we just call PROM functions directly. 137 */ 138#define rex_bootinit __rex_bootinit 139#define rex_bootread __rex_bootread 140#define rex_getbitmap __rex_getbitmap 141#define rex_slot_address __rex_slot_address 142#define rex_gettcinfo __rex_gettcinfo 143#define rex_getsysid __rex_getsysid 144#define rex_clear_cache __rex_clear_cache 145 146#define prom_getchar __prom_getchar 147#define prom_getenv __prom_getenv 148#define prom_printf __prom_printf 149 150#define pmax_open __pmax_open 151#define pmax_lseek __pmax_lseek 152#define pmax_read __pmax_read 153#define pmax_close __pmax_close 154 155#endif /* !CONFIG_64BIT */ 156 157 158extern void prom_meminit(u32); 159extern void prom_identify_arch(u32); 160extern void prom_init_cmdline(s32, s32 *, u32); 161 162extern void register_prom_console(void); 163extern void unregister_prom_console(void); 164 165#endif /* _ASM_DEC_PROM_H */