1 /* $NetBSD: promlib.c,v 1.3 2011/05/21 15:50:42 tsutsui 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * OPENPROM functions. These are here mainly to hide the OPENPROM interface 34 * from the rest of the kernel. 35 */ 36 37 #include <sys/types.h> 38 #include <machine/promlib.h> 39 40 #include <lib/libsa/stand.h> 41 #include <lib/libkern/libkern.h> 42 43 #include "openfirm.h" 44 45 46 void *romp; 47 struct promops promops; 48 49 50 static void 51 openfirmware_fatal(void) 52 { 53 printf("Invalid Openfirmware environment\n"); 54 exit(0); 55 } 56 57 static int 58 openfirmware_chosen(void) 59 { 60 static int phandle = -1; 61 62 if (phandle == -1) { 63 if ( (phandle = OF_finddevice("/chosen")) == -1) { 64 exit(0); 65 } 66 } 67 68 return (phandle); 69 } 70 71 static const char* 72 openfirmware_bootpath(void) 73 { 74 static char bootpath[PROM_MAX_PATH]; 75 76 if (_prom_getprop(openfirmware_chosen(), "bootpath", bootpath, 77 sizeof(bootpath)) < 0) { 78 openfirmware_fatal(); 79 } 80 81 return bootpath; 82 } 83 84 static const char* 85 openfirmware_bootfile(void) 86 { 87 /* Default image name */ 88 return "netbsd"; 89 } 90 91 static const char* 92 openfirmware_bootargs(void) 93 { 94 static char bootargs[PROM_MAX_PATH * 2]; 95 96 if (_prom_getprop(openfirmware_chosen(), "bootargs", bootargs, 97 sizeof(bootargs)) < 0) { 98 openfirmware_fatal(); 99 } 100 101 return bootargs; 102 } 103 104 static int 105 openfirmware_getchar(void) 106 { 107 unsigned char ch = '\0'; 108 int l; 109 110 while ((l = OF_read(prom_stdin(), &ch, 1)) != 1) 111 if (l != -2 && l != 0) 112 return -1; 113 return ch; 114 } 115 116 static void 117 openfirmware_putchar(int c) 118 { 119 char ch = c; 120 121 if (c == '\n') 122 putchar('\r'); 123 OF_write(prom_stdout(), &ch, 1); 124 } 125 126 void 127 prom_halt(void) 128 { 129 _prom_halt(); 130 } 131 132 int 133 prom_findroot(void) 134 { 135 return OF_peer(0); 136 } 137 138 void 139 prom_init(void) 140 { 141 int phandle, size; 142 143 OF_initialize(); 144 145 memset(&promops, 0, sizeof(promops)); 146 147 /* Access to boot arguments */ 148 promops.po_bootpath = openfirmware_bootpath; 149 promops.po_bootfile = openfirmware_bootfile; 150 promops.po_bootargs = openfirmware_bootargs; 151 152 /* I/O functions */ 153 promops.po_getchar = openfirmware_getchar; 154 promops.po_putchar = openfirmware_putchar; 155 promops.po_open = OF_open; 156 promops.po_close = OF_close; 157 promops.po_read = OF_read; 158 promops.po_write = OF_write; 159 promops.po_seek = OF_seek; 160 161 promops.po_instance_to_package = OF_instance_to_package; 162 163 /* Program termination control */ 164 promops.po_halt = OF_exit; 165 promops.po_abort = OF_enter; 166 promops.po_ticks = OF_milliseconds; 167 168 /* Device node traversal */ 169 promops.po_firstchild = OF_child; 170 promops.po_nextsibling = OF_peer; 171 172 /* Device node properties */ 173 promops.po_getprop = OF_getprop; 174 175 /* Device discovery */ 176 promops.po_finddevice = OF_finddevice; 177 178 /* Console I/O */ 179 phandle = openfirmware_chosen(); 180 size = _prom_getprop(phandle, "stdin", &promops.po_stdin, 181 sizeof(promops.po_stdin)); 182 size += _prom_getprop(phandle, "stdout", &promops.po_stdout, 183 sizeof(promops.po_stdout)); 184 if (size != (sizeof(promops.po_stdin) + sizeof(promops.po_stdout))) { 185 prom_halt(); 186 } 187 } 188