1 /* $NetBSD: promlib.c,v 1.1 2006/01/27 18:31:12 cdi Exp $ */ 2 3 /*- 4 * Copyright (c) 2005 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Paul Kranenburg. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * OPENPROM functions. These are here mainly to hide the OPENPROM interface 41 * from the rest of the kernel. 42 */ 43 44 #include <sys/types.h> 45 #include <machine/promlib.h> 46 47 #include "openfirm.h" 48 49 50 void *romp; 51 struct promops promops; 52 53 54 static void 55 openfirmware_fatal(void) 56 { 57 printf("Invalid Openfirmware environment\n"); 58 exit(0); 59 } 60 61 static int 62 openfirmware_chosen(void) 63 { 64 static int phandle = -1; 65 66 if (phandle == -1) { 67 if ( (phandle = OF_finddevice("/chosen")) == -1) { 68 exit(0); 69 } 70 } 71 72 return (phandle); 73 } 74 75 static const char* 76 openfirmware_bootpath(void) 77 { 78 static char bootpath[PROM_MAX_PATH]; 79 80 if (_prom_getprop(openfirmware_chosen(), "bootpath", bootpath, 81 sizeof(bootpath)) < 0) { 82 openfirmware_fatal(); 83 } 84 85 return bootpath; 86 } 87 88 static const char* 89 openfirmware_bootfile(void) 90 { 91 /* Default image name */ 92 return "netbsd"; 93 } 94 95 static const char* 96 openfirmware_bootargs(void) 97 { 98 static char bootargs[PROM_MAX_PATH * 2]; 99 100 if (_prom_getprop(openfirmware_chosen(), "bootargs", bootargs, 101 sizeof(bootargs)) < 0) { 102 openfirmware_fatal(); 103 } 104 105 return bootargs; 106 } 107 108 static int 109 openfirmware_getchar(void) 110 { 111 unsigned char ch = '\0'; 112 int l; 113 114 while ((l = OF_read(prom_stdin(), &ch, 1)) != 1) 115 if (l != -2 && l != 0) 116 return -1; 117 return ch; 118 } 119 120 static void 121 openfirmware_putchar(int c) 122 { 123 char ch = c; 124 125 if (c == '\n') 126 putchar('\r'); 127 OF_write(prom_stdout(), &ch, 1); 128 } 129 130 void 131 prom_halt(void) 132 { 133 _prom_halt(); 134 } 135 136 int 137 prom_findroot(void) 138 { 139 return OF_peer(0); 140 } 141 142 void 143 prom_init(void) 144 { 145 int phandle, size; 146 147 OF_initialize(); 148 149 memset(promops, 0, sizeof(promops)); 150 151 /* Access to boot arguments */ 152 promops.po_bootpath = openfirmware_bootpath; 153 promops.po_bootfile = openfirmware_bootfile; 154 promops.po_bootargs = openfirmware_bootargs; 155 156 /* I/O functions */ 157 promops.po_getchar = openfirmware_getchar; 158 promops.po_putchar = openfirmware_putchar; 159 promops.po_open = OF_open; 160 promops.po_close = OF_close; 161 promops.po_read = OF_read; 162 promops.po_write = OF_write; 163 promops.po_seek = OF_seek; 164 165 promops.po_instance_to_package = OF_instance_to_package; 166 167 /* Program termination control */ 168 promops.po_halt = OF_exit; 169 promops.po_abort = OF_enter; 170 promops.po_ticks = OF_milliseconds; 171 172 /* Device node traversal */ 173 promops.po_firstchild = OF_child; 174 promops.po_nextsibling = OF_peer; 175 176 /* Device node properties */ 177 promops.po_getprop = OF_getprop; 178 179 /* Device discovery */ 180 promops.po_finddevice = OF_finddevice; 181 182 /* Console I/O */ 183 phandle = openfirmware_chosen(); 184 size = _prom_getprop(phandle, "stdin", &promops.po_stdin, 185 sizeof(promops.po_stdin)); 186 size += _prom_getprop(phandle, "stdout", &promops.po_stdout, 187 sizeof(promops.po_stdout)); 188 if (size != (sizeof(promops.po_stdin) + sizeof(promops.po_stdout))) { 189 prom_halt(); 190 } 191 } 192