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 #include <sys/endian.h> 30 31 #include <stand.h> 32 #include "openfirm.h" 33 #include "libofw.h" 34 #include "bootstrap.h" 35 36 #include <machine/asm.h> 37 #include <machine/psl.h> 38 39 struct arch_switch archsw; /* MI/MD interface boundary */ 40 41 extern char end[]; 42 43 uint32_t acells, scells; 44 45 static char bootargs[128]; 46 47 #define HEAP_SIZE 0x800000 48 static char heap[HEAP_SIZE]; // In BSS, so uses no space 49 50 #define OF_puts(fd, text) OF_write(fd, text, strlen(text)) 51 52 static __inline register_t 53 mfmsr(void) 54 { 55 register_t value; 56 57 __asm __volatile ("mfmsr %0" : "=r"(value)); 58 59 return (value); 60 } 61 62 void 63 init_heap(void) 64 { 65 bzero(heap, HEAP_SIZE); 66 67 setheap(heap, (void *)((uintptr_t)heap + HEAP_SIZE)); 68 } 69 70 uint64_t 71 memsize(void) 72 { 73 phandle_t memoryp; 74 cell_t reg[24]; 75 int i, sz; 76 uint64_t memsz; 77 78 memsz = 0; 79 memoryp = OF_instance_to_package(memory); 80 81 sz = OF_getencprop(memoryp, "reg", ®[0], sizeof(reg)); 82 sz /= sizeof(reg[0]); 83 84 for (i = 0; i < sz; i += (acells + scells)) { 85 if (scells > 1) 86 memsz += (uint64_t)reg[i + acells] << 32; 87 memsz += reg[i + acells + scells - 1]; 88 } 89 90 return (memsz); 91 } 92 93 #ifdef CAS 94 extern int ppc64_cas(void); 95 96 static int 97 ppc64_autoload(void) 98 { 99 const char *cas; 100 101 if ((cas = getenv("cas")) && cas[0] == '1') 102 if (ppc64_cas() != 0) 103 return (-1); 104 return (ofw_autoload()); 105 } 106 #endif 107 108 #if BYTE_ORDER == LITTLE_ENDIAN 109 /* 110 * In Little-endian, we cannot just branch to the client interface. Since 111 * the client interface is big endian, we have to rfid to it. 112 * Likewise, when execution resumes, we are in the wrong endianness so 113 * we must do a fixup before returning to the caller. 114 */ 115 static int (*openfirmware_entry)(void *); 116 extern int openfirmware_trampoline(void *buf, int (*cb)(void *)); 117 118 /* 119 * Wrapper to pass the real entry point to our trampoline. 120 */ 121 static int 122 openfirmware_docall(void *buf) 123 { 124 return openfirmware_trampoline(buf, openfirmware_entry); 125 } 126 #endif 127 128 int 129 main(int (*openfirm)(void *)) 130 { 131 phandle_t root; 132 int i; 133 char bootpath[64]; 134 char *ch; 135 int bargc; 136 char **bargv; 137 138 /* 139 * Initialise the Open Firmware routines by giving them the entry point. 140 */ 141 #if BYTE_ORDER == LITTLE_ENDIAN 142 /* 143 * Use a trampoline entry point for endian fixups. 144 */ 145 openfirmware_entry = openfirm; 146 OF_init(openfirmware_docall); 147 #else 148 OF_init(openfirm); 149 #endif 150 151 root = OF_finddevice("/"); 152 153 scells = acells = 1; 154 OF_getencprop(root, "#address-cells", &acells, sizeof(acells)); 155 OF_getencprop(root, "#size-cells", &scells, sizeof(scells)); 156 157 /* 158 * Initialise the heap as early as possible. Once this is done, 159 * alloc() is usable. The stack is buried inside us, so this is 160 * safe. 161 */ 162 init_heap(); 163 164 /* 165 * Set up console. 166 */ 167 cons_probe(); 168 169 archsw.arch_getdev = ofw_getdev; 170 archsw.arch_copyin = ofw_copyin; 171 archsw.arch_copyout = ofw_copyout; 172 archsw.arch_readin = ofw_readin; 173 #ifdef CAS 174 setenv("cas", "1", 0); 175 archsw.arch_autoload = ppc64_autoload; 176 #else 177 archsw.arch_autoload = ofw_autoload; 178 #endif 179 180 /* Set up currdev variable to have hooks in place. */ 181 env_setenv("currdev", EV_VOLATILE, "", gen_setcurrdev, env_nounset); 182 183 devinit(); 184 185 printf("\n%s", bootprog_info); 186 printf("Memory: %lldKB\n", memsize() / 1024); 187 188 OF_getprop(chosen, "bootpath", bootpath, 64); 189 ch = strchr(bootpath, ':'); 190 *ch = '\0'; 191 printf("Booted from: %s\n", bootpath); 192 193 printf("\n"); 194 195 /* 196 * Only parse the first bootarg if present. It should 197 * be simple to handle extra arguments 198 */ 199 OF_getprop(chosen, "bootargs", bootargs, sizeof(bootargs)); 200 bargc = 0; 201 parse(&bargc, &bargv, bootargs); 202 if (bargc == 1) 203 env_setenv("currdev", EV_VOLATILE, bargv[0], gen_setcurrdev, 204 env_nounset); 205 else 206 env_setenv("currdev", EV_VOLATILE, bootpath, 207 gen_setcurrdev, env_nounset); 208 env_setenv("loaddev", EV_VOLATILE, bootpath, env_noset, 209 env_nounset); 210 setenv("LINES", "24", 1); /* optional */ 211 212 /* 213 * On non-Apple hardware, where it works reliably, pass flattened 214 * device trees to the kernel by default instead of OF CI pointers. 215 * Apple hardware is the only virtual-mode OF implementation in 216 * existence, so far as I am aware, so use that as a flag. 217 */ 218 if (!(mfmsr() & PSL_DR)) 219 setenv("usefdt", "1", 1); 220 221 interact(); /* doesn't return */ 222 223 OF_exit(); 224 225 return 0; 226 } 227 228 COMMAND_SET(halt, "halt", "halt the system", command_halt); 229 230 static int 231 command_halt(int argc, char *argv[]) 232 { 233 234 OF_exit(); 235 return (CMD_OK); 236 } 237 238 COMMAND_SET(memmap, "memmap", "print memory map", command_memmap); 239 240 int 241 command_memmap(int argc, char **argv) 242 { 243 244 ofw_memmap(acells); 245 return (CMD_OK); 246 } 247