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/endian.h> 29 30 #include <stand.h> 31 #include "openfirm.h" 32 #include "libofw.h" 33 #include "bootstrap.h" 34 35 #include <machine/asm.h> 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 *)((uintptr_t)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_getencprop(memoryp, "reg", ®[0], 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 #ifdef CAS 93 extern int ppc64_cas(void); 94 95 static int 96 ppc64_autoload(void) 97 { 98 const char *cas; 99 100 if ((cas = getenv("cas")) && cas[0] == '1') 101 if (ppc64_cas() != 0) 102 return (-1); 103 return (ofw_autoload()); 104 } 105 #endif 106 107 #if BYTE_ORDER == LITTLE_ENDIAN 108 /* 109 * In Little-endian, we cannot just branch to the client interface. Since 110 * the client interface is big endian, we have to rfid to it. 111 * Likewise, when execution resumes, we are in the wrong endianness so 112 * we must do a fixup before returning to the caller. 113 */ 114 static int (*openfirmware_entry)(void *); 115 extern int openfirmware_trampoline(void *buf, int (*cb)(void *)); 116 117 /* 118 * Wrapper to pass the real entry point to our trampoline. 119 */ 120 static int 121 openfirmware_docall(void *buf) 122 { 123 return openfirmware_trampoline(buf, openfirmware_entry); 124 } 125 #endif 126 127 int 128 main(int (*openfirm)(void *)) 129 { 130 phandle_t root; 131 int i; 132 char bootpath[64]; 133 char *ch; 134 int bargc; 135 char **bargv; 136 137 /* 138 * Initialise the Open Firmware routines by giving them the entry point. 139 */ 140 #if BYTE_ORDER == LITTLE_ENDIAN 141 /* 142 * Use a trampoline entry point for endian fixups. 143 */ 144 openfirmware_entry = openfirm; 145 OF_init(openfirmware_docall); 146 #else 147 OF_init(openfirm); 148 #endif 149 150 root = OF_finddevice("/"); 151 152 scells = acells = 1; 153 OF_getencprop(root, "#address-cells", &acells, sizeof(acells)); 154 OF_getencprop(root, "#size-cells", &scells, sizeof(scells)); 155 156 /* 157 * Initialise the heap as early as possible. Once this is done, 158 * alloc() is usable. The stack is buried inside us, so this is 159 * safe. 160 */ 161 init_heap(); 162 163 /* 164 * Set up console. 165 */ 166 cons_probe(); 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 #ifdef CAS 173 setenv("cas", "1", 0); 174 archsw.arch_autoload = ppc64_autoload; 175 #else 176 archsw.arch_autoload = ofw_autoload; 177 #endif 178 179 /* Set up currdev variable to have hooks in place. */ 180 env_setenv("currdev", EV_VOLATILE, "", gen_setcurrdev, env_nounset); 181 182 devinit(); 183 184 printf("\n%s", bootprog_info); 185 printf("Memory: %lldKB\n", memsize() / 1024); 186 187 OF_getprop(chosen, "bootpath", bootpath, 64); 188 ch = strchr(bootpath, ':'); 189 *ch = '\0'; 190 printf("Booted from: %s\n", bootpath); 191 192 printf("\n"); 193 194 /* 195 * Only parse the first bootarg if present. It should 196 * be simple to handle extra arguments 197 */ 198 OF_getprop(chosen, "bootargs", bootargs, sizeof(bootargs)); 199 bargc = 0; 200 parse(&bargc, &bargv, bootargs); 201 if (bargc == 1) 202 env_setenv("currdev", EV_VOLATILE, bargv[0], gen_setcurrdev, 203 env_nounset); 204 else 205 env_setenv("currdev", EV_VOLATILE, bootpath, 206 gen_setcurrdev, env_nounset); 207 env_setenv("loaddev", EV_VOLATILE, bootpath, env_noset, 208 env_nounset); 209 setenv("LINES", "24", 1); /* optional */ 210 211 /* 212 * On non-Apple hardware, where it works reliably, pass flattened 213 * device trees to the kernel by default instead of OF CI pointers. 214 * Apple hardware is the only virtual-mode OF implementation in 215 * existence, so far as I am aware, so use that as a flag. 216 */ 217 if (!(mfmsr() & PSL_DR)) 218 setenv("usefdt", "1", 1); 219 220 interact(); /* doesn't return */ 221 222 OF_exit(); 223 224 return 0; 225 } 226 227 COMMAND_SET(halt, "halt", "halt the system", command_halt); 228 229 static int 230 command_halt(int argc, char *argv[]) 231 { 232 233 OF_exit(); 234 return (CMD_OK); 235 } 236 237 COMMAND_SET(memmap, "memmap", "print memory map", command_memmap); 238 239 int 240 command_memmap(int argc, char **argv) 241 { 242 243 ofw_memmap(acells); 244 return (CMD_OK); 245 } 246