1/*- 2 * Copyright (c) 2006 Wojciech A. Koszek <wkoszek@FreeBSD.org> 3 * Copyright (c) 2012 Robert N. M. Watson 4 * All rights reserved. 5 * 6 * This software was developed by SRI International and the University of 7 * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237) 8 * ("CTSRD"), as part of the DARPA CRASH research programme. 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 AUTHOR AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31#include <sys/cdefs.h> 32__FBSDID("$FreeBSD$"); 33 34#include "opt_ddb.h" 35#include "opt_platform.h" 36 37#include <sys/param.h> 38#include <sys/conf.h> 39#include <sys/kernel.h> 40#include <sys/systm.h> 41#include <sys/imgact.h> 42#include <sys/bio.h> 43#include <sys/buf.h> 44#include <sys/bus.h> 45#include <sys/cpu.h> 46#include <sys/cons.h> 47#include <sys/exec.h> 48#include <sys/linker.h> 49#include <sys/ucontext.h> 50#include <sys/proc.h> 51#include <sys/kdb.h> 52#include <sys/ptrace.h> 53#include <sys/reboot.h> 54#include <sys/signalvar.h> 55#include <sys/sysent.h> 56#include <sys/sysproto.h> 57#include <sys/user.h> 58 59#ifdef FDT 60#include <dev/fdt/fdt_common.h> 61#include <dev/ofw/openfirm.h> 62#endif 63 64#include <vm/vm.h> 65#include <vm/vm_object.h> 66#include <vm/vm_page.h> 67 68#include <machine/clock.h> 69#include <machine/cpu.h> 70#include <machine/cpuregs.h> 71#include <machine/hwfunc.h> 72#include <machine/md_var.h> 73#include <machine/metadata.h> 74#include <machine/pmap.h> 75#include <machine/trap.h> 76 77extern int *edata; 78extern int *end; 79 80void 81platform_cpu_init() 82{ 83 /* Nothing special */ 84} 85 86static void 87mips_init(void) 88{ 89 int i; 90 91 for (i = 0; i < 10; i++) { 92 phys_avail[i] = 0; 93 } 94 95 /* phys_avail regions are in bytes */ 96 phys_avail[0] = MIPS_KSEG0_TO_PHYS(kernel_kseg0_end); 97 phys_avail[1] = ctob(realmem); 98 99 dump_avail[0] = phys_avail[0]; 100 dump_avail[1] = phys_avail[1]; 101 102 physmem = realmem; 103 104 init_param1(); 105 init_param2(physmem); 106 mips_cpu_init(); 107 pmap_bootstrap(); 108 mips_proc0_init(); 109 mutex_init(); 110 kdb_init(); 111#ifdef KDB 112 if (boothowto & RB_KDB) 113 kdb_enter(KDB_WHY_BOOTFLAGS, "Boot flags requested debugger"); 114#endif 115} 116 117/* 118 * Perform a board-level soft-reset. 119 */ 120void 121platform_reset(void) 122{ 123 124 /* XXX SMP will likely require us to do more. */ 125 __asm__ __volatile__( 126 "mfc0 $k0, $12\n\t" 127 "li $k1, 0x00100000\n\t" 128 "or $k0, $k0, $k1\n\t" 129 "mtc0 $k0, $12\n"); 130 for( ; ; ) 131 __asm__ __volatile("wait"); 132} 133 134#ifdef FDT 135/* Parse cmd line args as env - copied from xlp_machdep. */ 136/* XXX-BZ this should really be centrally provided for all (boot) code. */ 137static void 138_parse_bootargs(char *cmdline) 139{ 140 char *n, *v; 141 142 while ((v = strsep(&cmdline, " \n")) != NULL) { 143 if (*v == '\0') 144 continue; 145 if (*v == '-') { 146 while (*v != '\0') { 147 v++; 148 switch (*v) { 149 case 'a': boothowto |= RB_ASKNAME; break; 150 /* Someone should simulate that ;-) */ 151 case 'C': boothowto |= RB_CDROM; break; 152 case 'd': boothowto |= RB_KDB; break; 153 case 'D': boothowto |= RB_MULTIPLE; break; 154 case 'm': boothowto |= RB_MUTE; break; 155 case 'g': boothowto |= RB_GDB; break; 156 case 'h': boothowto |= RB_SERIAL; break; 157 case 'p': boothowto |= RB_PAUSE; break; 158 case 'r': boothowto |= RB_DFLTROOT; break; 159 case 's': boothowto |= RB_SINGLE; break; 160 case 'v': boothowto |= RB_VERBOSE; break; 161 } 162 } 163 } else { 164 n = strsep(&v, "="); 165 if (v == NULL) 166 setenv(n, "1"); 167 else 168 setenv(n, v); 169 } 170 } 171} 172#endif 173 174void 175platform_start(__register_t a0, __register_t a1, __register_t a2, 176 __register_t a3) 177{ 178 vm_offset_t kernend; 179 uint64_t platform_counter_freq; 180 int argc = a0; 181 char **argv = (char **)a1; 182 char **envp = (char **)a2; 183 unsigned int memsize = a3; 184#ifdef FDT 185 char buf[2048]; /* early stack supposedly big enough */ 186 vm_offset_t dtbp; 187 phandle_t chosen; 188 void *kmdp; 189#endif 190 int i; 191 192 /* clear the BSS and SBSS segments */ 193 kernend = (vm_offset_t)&end; 194 memset(&edata, 0, kernend - (vm_offset_t)(&edata)); 195 196 mips_postboot_fixup(); 197 198 mips_pcpu0_init(); 199 200#ifdef FDT 201 /* 202 * Find the dtb passed in by the boot loader (currently fictional). 203 */ 204 kmdp = preload_search_by_type("elf kernel"); 205 if (kmdp != NULL) 206 dtbp = MD_FETCH(kmdp, MODINFOMD_DTBP, vm_offset_t); 207 else 208 dtbp = (vm_offset_t)NULL; 209 210#if defined(FDT_DTB_STATIC) 211 /* 212 * In case the device tree blob was not retrieved (from metadata) try 213 * to use the statically embedded one. 214 */ 215 if (dtbp == (vm_offset_t)NULL) 216 dtbp = (vm_offset_t)&fdt_static_dtb; 217#else 218#error "Non-static FDT not yet supported on BERI" 219#endif 220 221 if (OF_install(OFW_FDT, 0) == FALSE) 222 while (1); 223 if (OF_init((void *)dtbp) != 0) 224 while (1); 225 226 /* 227 * Get bootargs from FDT if specified. 228 */ 229 chosen = OF_finddevice("/chosen"); 230 if (OF_getprop(chosen, "bootargs", buf, sizeof(buf)) != -1) 231 _parse_bootargs(buf); 232#endif 233 234 /* 235 * XXXRW: We have no way to compare wallclock time to cycle rate on 236 * BERI, so for now assume we run at the MALTA default (100MHz). 237 */ 238 platform_counter_freq = MIPS_DEFAULT_HZ; 239 mips_timer_early_init(platform_counter_freq); 240 241 cninit(); 242 printf("entry: platform_start()\n"); 243 244 bootverbose = 1; 245 if (bootverbose) { 246 printf("cmd line: "); 247 for (i = 0; i < argc; i++) 248 printf("%s ", argv[i]); 249 printf("\n"); 250 251 printf("envp:\n"); 252 for (i = 0; envp[i]; i += 2) 253 printf("\t%s = %s\n", envp[i], envp[i+1]); 254 255 printf("memsize = %08x\n", memsize); 256 } 257 258 realmem = btoc(memsize); 259 mips_init(); 260 261 mips_timer_init_params(platform_counter_freq, 0); 262} 263