ar71xx_machdep.c revision 220096
1/*- 2 * Copyright (c) 2009 Oleksandr Tymoshenko 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27#include <sys/cdefs.h> 28__FBSDID("$FreeBSD: head/sys/mips/atheros/ar71xx_machdep.c 220096 2011-03-28 09:10:59Z adrian $"); 29 30#include <sys/param.h> 31#include <machine/cpuregs.h> 32 33#include <mips/sentry5/s5reg.h> 34 35#include "opt_ddb.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/bus.h> 42#include <sys/cons.h> 43#include <sys/kdb.h> 44#include <sys/reboot.h> 45 46#include <vm/vm.h> 47#include <vm/vm_page.h> 48 49#include <net/ethernet.h> 50 51#include <machine/clock.h> 52#include <machine/cpu.h> 53#include <machine/hwfunc.h> 54#include <machine/md_var.h> 55#include <machine/trap.h> 56#include <machine/vmparam.h> 57 58#include <mips/atheros/ar71xxreg.h> 59 60#include <mips/atheros/ar71xx_setup.h> 61#include <mips/atheros/ar71xx_cpudef.h> 62 63extern char edata[], end[]; 64 65uint32_t ar711_base_mac[ETHER_ADDR_LEN]; 66/* 4KB static data aread to keep a copy of the bootload env until 67 the dynamic kenv is setup */ 68char boot1_env[4096]; 69 70/* 71 * We get a string in from Redboot with the all the arguments together, 72 * "foo=bar bar=baz". Split them up and save in kenv. 73 */ 74static void 75parse_argv(char *str) 76{ 77 char *n, *v; 78 79 while ((v = strsep(&str, " ")) != NULL) { 80 if (*v == '\0') 81 continue; 82 if (*v == '-') { 83 while (*v != '\0') { 84 v++; 85 switch (*v) { 86 case 'a': boothowto |= RB_ASKNAME; break; 87 case 'd': boothowto |= RB_KDB; break; 88 case 'g': boothowto |= RB_GDB; break; 89 case 's': boothowto |= RB_SINGLE; break; 90 case 'v': boothowto |= RB_VERBOSE; break; 91 } 92 } 93 } else { 94 n = strsep(&v, "="); 95 if (v == NULL) 96 setenv(n, "1"); 97 else 98 setenv(n, v); 99 } 100 } 101} 102 103void 104platform_cpu_init() 105{ 106 /* Nothing special */ 107} 108 109void 110platform_halt(void) 111{ 112 113} 114 115void 116platform_identify(void) 117{ 118 119} 120 121void 122platform_reset(void) 123{ 124 ar71xx_device_stop(RST_RESET_FULL_CHIP); 125 /* Wait for reset */ 126 while(1) 127 ; 128} 129 130void 131platform_trap_enter(void) 132{ 133 134} 135 136void 137platform_trap_exit(void) 138{ 139 140} 141 142/* 143 * Obtain the MAC address via the Redboot environment. 144 */ 145static void 146ar71xx_redboot_get_macaddr(void) 147{ 148 char *var; 149 int count = 0; 150 151 /* 152 * "ethaddr" is passed via envp on RedBoot platforms 153 * "kmac" is passed via argv on RouterBOOT platforms 154 */ 155 if ((var = getenv("ethaddr")) != NULL || 156 (var = getenv("kmac")) != NULL) { 157 count = sscanf(var, "%x%*c%x%*c%x%*c%x%*c%x%*c%x", 158 &ar711_base_mac[0], &ar711_base_mac[1], 159 &ar711_base_mac[2], &ar711_base_mac[3], 160 &ar711_base_mac[4], &ar711_base_mac[5]); 161 if (count < 6) 162 memset(ar711_base_mac, 0, 163 sizeof(ar711_base_mac)); 164 freeenv(var); 165 } 166} 167 168void 169platform_start(__register_t a0 __unused, __register_t a1 __unused, 170 __register_t a2 __unused, __register_t a3 __unused) 171{ 172 uint64_t platform_counter_freq; 173 int argc, i; 174 char **argv, **envp; 175 vm_offset_t kernend; 176 177 /* 178 * clear the BSS and SBSS segments, this should be first call in 179 * the function 180 */ 181 kernend = (vm_offset_t)&end; 182 memset(&edata, 0, kernend - (vm_offset_t)(&edata)); 183 184 mips_postboot_fixup(); 185 186 /* Initialize pcpu stuff */ 187 mips_pcpu0_init(); 188 189 argc = a0; 190 argv = (char**)a1; 191 envp = (char**)a2; 192 /* 193 * Protect ourselves from garbage in registers 194 */ 195 if (MIPS_IS_VALID_PTR(envp)) { 196 for (i = 0; envp[i]; i += 2) { 197 if (strcmp(envp[i], "memsize") == 0) 198 realmem = btoc(strtoul(envp[i+1], NULL, 16)); 199 } 200 } 201 202 /* 203 * Just wild guess. RedBoot let us down and didn't reported 204 * memory size 205 */ 206 if (realmem == 0) 207 realmem = btoc(32*1024*1024); 208 209 /* 210 * Allow build-time override in case Redboot lies 211 * or in other situations (eg where there's u-boot) 212 * where there isn't (yet) a convienent method of 213 * being told how much RAM is available. 214 * 215 * This happens on at least the Ubiquiti LS-SR71A 216 * board, where redboot says there's 16mb of RAM 217 * but in fact there's 32mb. 218 */ 219#if defined(AR71XX_REALMEM) 220 realmem = btoc(AR71XX_REALMEM); 221#endif 222 223 /* phys_avail regions are in bytes */ 224 phys_avail[0] = MIPS_KSEG0_TO_PHYS(kernel_kseg0_end); 225 phys_avail[1] = ctob(realmem); 226 227 dump_avail[0] = phys_avail[0]; 228 dump_avail[1] = phys_avail[1] - phys_avail[0]; 229 230 physmem = realmem; 231 232 /* 233 * ns8250 uart code uses DELAY so ticker should be inititalized 234 * before cninit. And tick_init_params refers to hz, so * init_param1 235 * should be called first. 236 */ 237 init_param1(); 238 239 /* Detect the system type - this is needed for subsequent chipset-specific calls */ 240 ar71xx_detect_sys_type(); 241 ar71xx_detect_sys_frequency(); 242 243 platform_counter_freq = ar71xx_cpu_freq(); 244 mips_timer_init_params(platform_counter_freq, 1); 245 cninit(); 246 init_static_kenv(boot1_env, sizeof(boot1_env)); 247 248 printf("CPU platform: %s\n", ar71xx_get_system_type()); 249 printf("CPU Frequency=%d MHz\n", u_ar71xx_cpu_freq / 1000000); 250 printf("CPU DDR Frequency=%d MHz\n", u_ar71xx_ddr_freq / 1000000); 251 printf("CPU AHB Frequency=%d MHz\n", u_ar71xx_ahb_freq / 1000000); 252 253 printf("platform frequency: %lld\n", platform_counter_freq); 254 printf("arguments: \n"); 255 printf(" a0 = %08x\n", a0); 256 printf(" a1 = %08x\n", a1); 257 printf(" a2 = %08x\n", a2); 258 printf(" a3 = %08x\n", a3); 259 260 printf("Cmd line:"); 261 if (MIPS_IS_VALID_PTR(argv)) { 262 for (i = 0; i < argc; i++) { 263 printf(" %s", argv[i]); 264 parse_argv(argv[i]); 265 } 266 } 267 else 268 printf ("argv is invalid"); 269 printf("\n"); 270 271 printf("Environment:\n"); 272 if (MIPS_IS_VALID_PTR(envp)) { 273 for (i = 0; envp[i]; i+=2) { 274 printf(" %s = %s\n", envp[i], envp[i+1]); 275 setenv(envp[i], envp[i+1]); 276 } 277 } 278 else 279 printf ("envp is invalid\n"); 280 281 /* Redboot if_arge MAC address is in the environment */ 282 ar71xx_redboot_get_macaddr(); 283 284 init_param2(physmem); 285 mips_cpu_init(); 286 pmap_bootstrap(); 287 mips_proc0_init(); 288 mutex_init(); 289 290 /* 291 * Reset USB devices 292 */ 293 ar71xx_init_usb_peripheral(); 294 295 kdb_init(); 296#ifdef KDB 297 if (boothowto & RB_KDB) 298 kdb_enter(KDB_WHY_BOOTFLAGS, "Boot flags requested debugger"); 299#endif 300} 301