1 /*- 2 * Copyright (c) 2000 Benno Rice <benno@jeamland.net> 3 * Copyright (c) 2000 Stephane Potvin <sepotvin@videotron.ca> 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 __FBSDID("$FreeBSD$"); 30 31 #include <stand.h> 32 #include "openfirm.h" 33 #include "libofw.h" 34 #include "bootstrap.h" 35 36 #include <machine/psl.h> 37 38 struct arch_switch archsw; /* MI/MD interface boundary */ 39 40 extern char end[]; 41 42 uint32_t acells, scells; 43 44 static char bootargs[128]; 45 46 #define HEAP_SIZE 0x800000 47 static char heap[HEAP_SIZE]; // In BSS, so uses no space 48 49 #define OF_puts(fd, text) OF_write(fd, text, strlen(text)) 50 51 static __inline register_t 52 mfmsr(void) 53 { 54 register_t value; 55 56 __asm __volatile ("mfmsr %0" : "=r"(value)); 57 58 return (value); 59 } 60 61 void 62 init_heap(void) 63 { 64 bzero(heap, HEAP_SIZE); 65 66 setheap(heap, (void *)((int)heap + HEAP_SIZE)); 67 } 68 69 uint64_t 70 memsize(void) 71 { 72 phandle_t memoryp; 73 cell_t reg[24]; 74 int i, sz; 75 uint64_t memsz; 76 77 memsz = 0; 78 memoryp = OF_instance_to_package(memory); 79 80 sz = OF_getprop(memoryp, "reg", ®, sizeof(reg)); 81 sz /= sizeof(reg[0]); 82 83 for (i = 0; i < sz; i += (acells + scells)) { 84 if (scells > 1) 85 memsz += (uint64_t)reg[i + acells] << 32; 86 memsz += reg[i + acells + scells - 1]; 87 } 88 89 return (memsz); 90 } 91 92 int 93 main(int (*openfirm)(void *)) 94 { 95 phandle_t root; 96 int i; 97 char bootpath[64]; 98 char *ch; 99 int bargc; 100 char **bargv; 101 102 /* 103 * Initialise the Open Firmware routines by giving them the entry point. 104 */ 105 OF_init(openfirm); 106 107 root = OF_finddevice("/"); 108 109 scells = acells = 1; 110 OF_getprop(root, "#address-cells", &acells, sizeof(acells)); 111 OF_getprop(root, "#size-cells", &scells, sizeof(scells)); 112 113 /* 114 * Initialise the heap as early as possible. Once this is done, 115 * alloc() is usable. The stack is buried inside us, so this is 116 * safe. 117 */ 118 init_heap(); 119 120 /* 121 * Set up console. 122 */ 123 cons_probe(); 124 125 /* 126 * March through the device switch probing for things. 127 */ 128 for (i = 0; devsw[i] != NULL; i++) 129 if (devsw[i]->dv_init != NULL) 130 (devsw[i]->dv_init)(); 131 132 printf("\n%s", bootprog_info); 133 printf("Memory: %lldKB\n", memsize() / 1024); 134 135 OF_getprop(chosen, "bootpath", bootpath, 64); 136 ch = strchr(bootpath, ':'); 137 *ch = '\0'; 138 printf("Booted from: %s\n", bootpath); 139 140 printf("\n"); 141 142 /* 143 * Only parse the first bootarg if present. It should 144 * be simple to handle extra arguments 145 */ 146 OF_getprop(chosen, "bootargs", bootargs, sizeof(bootargs)); 147 bargc = 0; 148 parse(&bargc, &bargv, bootargs); 149 if (bargc == 1) 150 env_setenv("currdev", EV_VOLATILE, bargv[0], ofw_setcurrdev, 151 env_nounset); 152 else 153 env_setenv("currdev", EV_VOLATILE, bootpath, 154 ofw_setcurrdev, env_nounset); 155 env_setenv("loaddev", EV_VOLATILE, bootpath, env_noset, 156 env_nounset); 157 setenv("LINES", "24", 1); /* optional */ 158 159 /* 160 * On non-Apple hardware, where it works reliably, pass flattened 161 * device trees to the kernel by default instead of OF CI pointers. 162 * Apple hardware is the only virtual-mode OF implementation in 163 * existence, so far as I am aware, so use that as a flag. 164 */ 165 if (!(mfmsr() & PSL_DR)) 166 setenv("usefdt", "1", 1); 167 168 archsw.arch_getdev = ofw_getdev; 169 archsw.arch_copyin = ofw_copyin; 170 archsw.arch_copyout = ofw_copyout; 171 archsw.arch_readin = ofw_readin; 172 archsw.arch_autoload = ofw_autoload; 173 174 interact(); /* doesn't return */ 175 176 OF_exit(); 177 178 return 0; 179 } 180 181 COMMAND_SET(halt, "halt", "halt the system", command_halt); 182 183 static int 184 command_halt(int argc, char *argv[]) 185 { 186 187 OF_exit(); 188 return (CMD_OK); 189 } 190 191 COMMAND_SET(memmap, "memmap", "print memory map", command_memmap); 192 193 int 194 command_memmap(int argc, char **argv) 195 { 196 197 ofw_memmap(acells); 198 return (CMD_OK); 199 } 200