1 /* 2 * (C) Copyright 2000 3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 6 */ 7 8 #include <common.h> 9 #include <autoboot.h> 10 #include <bootretry.h> 11 #include <cli.h> 12 #include <fdtdec.h> 13 #include <menu.h> 14 #include <post.h> 15 16 DECLARE_GLOBAL_DATA_PTR; 17 18 #define MAX_DELAY_STOP_STR 32 19 20 #ifndef DEBUG_BOOTKEYS 21 #define DEBUG_BOOTKEYS 0 22 #endif 23 #define debug_bootkeys(fmt, args...) \ 24 debug_cond(DEBUG_BOOTKEYS, fmt, ##args) 25 26 /* Stored value of bootdelay, used by autoboot_command() */ 27 static int stored_bootdelay; 28 29 /*************************************************************************** 30 * Watch for 'delay' seconds for autoboot stop or autoboot delay string. 31 * returns: 0 - no key string, allow autoboot 1 - got key string, abort 32 */ 33 # if defined(CONFIG_AUTOBOOT_KEYED) 34 static int abortboot_keyed(int bootdelay) 35 { 36 int abort = 0; 37 uint64_t etime = endtick(bootdelay); 38 struct { 39 char *str; 40 u_int len; 41 int retry; 42 } 43 delaykey[] = { 44 { .str = getenv("bootdelaykey"), .retry = 1 }, 45 { .str = getenv("bootstopkey"), .retry = 0 }, 46 }; 47 48 char presskey[MAX_DELAY_STOP_STR]; 49 u_int presskey_len = 0; 50 u_int presskey_max = 0; 51 u_int i; 52 53 #ifndef CONFIG_ZERO_BOOTDELAY_CHECK 54 if (bootdelay == 0) 55 return 0; 56 #endif 57 58 # ifdef CONFIG_AUTOBOOT_PROMPT 59 /* 60 * CONFIG_AUTOBOOT_PROMPT includes the %d for all boards. 61 * To print the bootdelay value upon bootup. 62 */ 63 printf(CONFIG_AUTOBOOT_PROMPT, bootdelay); 64 # endif 65 66 # ifdef CONFIG_AUTOBOOT_DELAY_STR 67 if (delaykey[0].str == NULL) 68 delaykey[0].str = CONFIG_AUTOBOOT_DELAY_STR; 69 # endif 70 # ifdef CONFIG_AUTOBOOT_STOP_STR 71 if (delaykey[1].str == NULL) 72 delaykey[1].str = CONFIG_AUTOBOOT_STOP_STR; 73 # endif 74 75 for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i++) { 76 delaykey[i].len = delaykey[i].str == NULL ? 77 0 : strlen(delaykey[i].str); 78 delaykey[i].len = delaykey[i].len > MAX_DELAY_STOP_STR ? 79 MAX_DELAY_STOP_STR : delaykey[i].len; 80 81 presskey_max = presskey_max > delaykey[i].len ? 82 presskey_max : delaykey[i].len; 83 84 debug_bootkeys("%s key:<%s>\n", 85 delaykey[i].retry ? "delay" : "stop", 86 delaykey[i].str ? delaykey[i].str : "NULL"); 87 } 88 89 /* In order to keep up with incoming data, check timeout only 90 * when catch up. 91 */ 92 do { 93 if (tstc()) { 94 if (presskey_len < presskey_max) { 95 presskey[presskey_len++] = getc(); 96 } else { 97 for (i = 0; i < presskey_max - 1; i++) 98 presskey[i] = presskey[i + 1]; 99 100 presskey[i] = getc(); 101 } 102 } 103 104 for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i++) { 105 if (delaykey[i].len > 0 && 106 presskey_len >= delaykey[i].len && 107 memcmp(presskey + presskey_len - 108 delaykey[i].len, delaykey[i].str, 109 delaykey[i].len) == 0) { 110 debug_bootkeys("got %skey\n", 111 delaykey[i].retry ? "delay" : 112 "stop"); 113 114 /* don't retry auto boot */ 115 if (!delaykey[i].retry) 116 bootretry_dont_retry(); 117 abort = 1; 118 } 119 } 120 } while (!abort && get_ticks() <= etime); 121 122 if (!abort) 123 debug_bootkeys("key timeout\n"); 124 125 #ifdef CONFIG_SILENT_CONSOLE 126 if (abort) 127 gd->flags &= ~GD_FLG_SILENT; 128 #endif 129 130 return abort; 131 } 132 133 # else /* !defined(CONFIG_AUTOBOOT_KEYED) */ 134 135 #ifdef CONFIG_MENUKEY 136 static int menukey; 137 #endif 138 139 static int abortboot_normal(int bootdelay) 140 { 141 int abort = 0; 142 unsigned long ts; 143 144 #ifdef CONFIG_MENUPROMPT 145 printf(CONFIG_MENUPROMPT); 146 #else 147 if (bootdelay >= 0) 148 printf("Hit any key to stop autoboot: %2d ", bootdelay); 149 #endif 150 151 #if defined CONFIG_ZERO_BOOTDELAY_CHECK 152 /* 153 * Check if key already pressed 154 * Don't check if bootdelay < 0 155 */ 156 if (bootdelay >= 0) { 157 if (tstc()) { /* we got a key press */ 158 (void) getc(); /* consume input */ 159 puts("\b\b\b 0"); 160 abort = 1; /* don't auto boot */ 161 } 162 } 163 #endif 164 165 while ((bootdelay > 0) && (!abort)) { 166 --bootdelay; 167 /* delay 1000 ms */ 168 ts = get_timer(0); 169 do { 170 if (tstc()) { /* we got a key press */ 171 abort = 1; /* don't auto boot */ 172 bootdelay = 0; /* no more delay */ 173 # ifdef CONFIG_MENUKEY 174 menukey = getc(); 175 # else 176 (void) getc(); /* consume input */ 177 # endif 178 break; 179 } 180 udelay(10000); 181 } while (!abort && get_timer(ts) < 1000); 182 183 printf("\b\b\b%2d ", bootdelay); 184 } 185 186 putc('\n'); 187 188 #ifdef CONFIG_SILENT_CONSOLE 189 if (abort) 190 gd->flags &= ~GD_FLG_SILENT; 191 #endif 192 193 return abort; 194 } 195 # endif /* CONFIG_AUTOBOOT_KEYED */ 196 197 static int abortboot(int bootdelay) 198 { 199 #ifdef CONFIG_AUTOBOOT_KEYED 200 return abortboot_keyed(bootdelay); 201 #else 202 return abortboot_normal(bootdelay); 203 #endif 204 } 205 206 static void process_fdt_options(const void *blob) 207 { 208 #if defined(CONFIG_OF_CONTROL) 209 ulong addr; 210 211 /* Add an env variable to point to a kernel payload, if available */ 212 addr = fdtdec_get_config_int(gd->fdt_blob, "kernel-offset", 0); 213 if (addr) 214 setenv_addr("kernaddr", (void *)(CONFIG_SYS_TEXT_BASE + addr)); 215 216 /* Add an env variable to point to a root disk, if available */ 217 addr = fdtdec_get_config_int(gd->fdt_blob, "rootdisk-offset", 0); 218 if (addr) 219 setenv_addr("rootaddr", (void *)(CONFIG_SYS_TEXT_BASE + addr)); 220 #endif /* CONFIG_OF_CONTROL */ 221 } 222 223 const char *bootdelay_process(void) 224 { 225 char *s; 226 int bootdelay; 227 #ifdef CONFIG_BOOTCOUNT_LIMIT 228 unsigned long bootcount = 0; 229 unsigned long bootlimit = 0; 230 #endif /* CONFIG_BOOTCOUNT_LIMIT */ 231 232 #ifdef CONFIG_BOOTCOUNT_LIMIT 233 bootcount = bootcount_load(); 234 bootcount++; 235 bootcount_store(bootcount); 236 setenv_ulong("bootcount", bootcount); 237 bootlimit = getenv_ulong("bootlimit", 10, 0); 238 #endif /* CONFIG_BOOTCOUNT_LIMIT */ 239 240 s = getenv("bootdelay"); 241 bootdelay = s ? (int)simple_strtol(s, NULL, 10) : CONFIG_BOOTDELAY; 242 243 #ifdef CONFIG_OF_CONTROL 244 bootdelay = fdtdec_get_config_int(gd->fdt_blob, "bootdelay", 245 bootdelay); 246 #endif 247 248 debug("### main_loop entered: bootdelay=%d\n\n", bootdelay); 249 250 #if defined(CONFIG_MENU_SHOW) 251 bootdelay = menu_show(bootdelay); 252 #endif 253 bootretry_init_cmd_timeout(); 254 255 #ifdef CONFIG_POST 256 if (gd->flags & GD_FLG_POSTFAIL) { 257 s = getenv("failbootcmd"); 258 } else 259 #endif /* CONFIG_POST */ 260 #ifdef CONFIG_BOOTCOUNT_LIMIT 261 if (bootlimit && (bootcount > bootlimit)) { 262 printf("Warning: Bootlimit (%u) exceeded. Using altbootcmd.\n", 263 (unsigned)bootlimit); 264 s = getenv("altbootcmd"); 265 } else 266 #endif /* CONFIG_BOOTCOUNT_LIMIT */ 267 s = getenv("bootcmd"); 268 269 process_fdt_options(gd->fdt_blob); 270 stored_bootdelay = bootdelay; 271 272 return s; 273 } 274 275 void autoboot_command(const char *s) 276 { 277 debug("### main_loop: bootcmd=\"%s\"\n", s ? s : "<UNDEFINED>"); 278 279 if (stored_bootdelay != -1 && s && !abortboot(stored_bootdelay)) { 280 #if defined(CONFIG_AUTOBOOT_KEYED) && !defined(CONFIG_AUTOBOOT_KEYED_CTRLC) 281 int prev = disable_ctrlc(1); /* disable Control C checking */ 282 #endif 283 284 run_command_list(s, -1, 0); 285 286 #if defined(CONFIG_AUTOBOOT_KEYED) && !defined(CONFIG_AUTOBOOT_KEYED_CTRLC) 287 disable_ctrlc(prev); /* restore Control C checking */ 288 #endif 289 } 290 291 #ifdef CONFIG_MENUKEY 292 if (menukey == CONFIG_MENUKEY) { 293 s = getenv("menucmd"); 294 if (s) 295 run_command_list(s, -1, 0); 296 } 297 #endif /* CONFIG_MENUKEY */ 298 } 299