1 /* $OpenBSD: prom.h,v 1.5 1996/11/28 20:09:29 niklas Exp $ */ 2 /* $NetBSD: prom.h,v 1.4 1996/10/15 23:52:49 cgd Exp $ */ 3 4 /* 5 * Copyright (c) 1994, 1995 Carnegie-Mellon University. 6 * All rights reserved. 7 * 8 * Author: Keith Bostic, Chris G. Demetriou 9 * 10 * Permission to use, copy, modify and distribute this software and 11 * its documentation is hereby granted, provided that both the copyright 12 * notice and this permission notice appear in all copies of the 13 * software, derivative works or modified versions, and any portions 14 * thereof, and that both notices appear in supporting documentation. 15 * 16 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 17 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 18 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 19 * 20 * Carnegie Mellon requests users of this software to return to 21 * 22 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 23 * School of Computer Science 24 * Carnegie Mellon University 25 * Pittsburgh PA 15213-3890 26 * 27 * any improvements or extensions that they make and grant Carnegie the 28 * rights to redistribute these changes. 29 */ 30 31 #ifndef ASSEMBLER 32 struct prom_vec { 33 int (*routine) __P((struct crd *)); 34 struct crd *routine_arg; 35 }; 36 37 /* The return value from a prom call. */ 38 typedef union { 39 struct { 40 u_int64_t 41 retval : 32, /* return value. */ 42 unit : 8, 43 mbz : 8, 44 error : 13, 45 status : 3; 46 } u; 47 u_int64_t bits; 48 } prom_return_t; 49 50 #ifdef STANDALONE 51 int getchar __P((void)); 52 int prom_open __P((char *, int)); 53 void putchar __P((int)); 54 #endif 55 56 void prom_halt __P((int)) __attribute__((__noreturn__)); 57 int prom_getenv __P((int, char *, int)); 58 59 void init_prom_interface __P((void)); 60 void hwrbp_restart_setup __P((void)); 61 int prom_dispatch __P((int, ...)); 62 int promcnlookc __P((dev_t, char *)); 63 #endif 64 65 /* Prom operation values. */ 66 #define PROM_R_CLOSE 0x11 67 #define PROM_R_GETC 0x01 68 #define PROM_R_GETENV 0x22 69 #define PROM_R_OPEN 0x10 70 #define PROM_R_PUTS 0x02 71 #define PROM_R_READ 0x13 72 #define PROM_R_WRITE 0x14 73 74 /* Environment variable values. */ 75 #define PROM_E_BOOTED_DEV 0x4 76 #define PROM_E_BOOTED_FILE 0x6 77 #define PROM_E_BOOTED_OSFLAGS 0x8 78 #define PROM_E_TTY_DEV 0xf 79 80 /* 81 * There have to be stub routines to do the copying that ensures that the 82 * PROM doesn't get called with an address larger than 32 bits. Calls that 83 * either don't need to copy anything, or don't need the copy because it's 84 * already being done elsewhere, are defined here. 85 */ 86 #define prom_close(chan) prom_dispatch(PROM_R_CLOSE, chan) 87 #define prom_read(chan, len, buf, blkno) \ 88 prom_dispatch(PROM_R_READ, chan, len, buf, blkno) 89 #define prom_write(chan, len, buf, blkno) \ 90 prom_dispatch(PROM_R_WRITE, chan, len, buf, blkno) 91