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 printf(CONFIG_AUTOBOOT_PROMPT); 60 # endif 61 62 # ifdef CONFIG_AUTOBOOT_DELAY_STR 63 if (delaykey[0].str == NULL) 64 delaykey[0].str = CONFIG_AUTOBOOT_DELAY_STR; 65 # endif 66 # ifdef CONFIG_AUTOBOOT_STOP_STR 67 if (delaykey[1].str == NULL) 68 delaykey[1].str = CONFIG_AUTOBOOT_STOP_STR; 69 # endif 70 71 for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i++) { 72 delaykey[i].len = delaykey[i].str == NULL ? 73 0 : strlen(delaykey[i].str); 74 delaykey[i].len = delaykey[i].len > MAX_DELAY_STOP_STR ? 75 MAX_DELAY_STOP_STR : delaykey[i].len; 76 77 presskey_max = presskey_max > delaykey[i].len ? 78 presskey_max : delaykey[i].len; 79 80 debug_bootkeys("%s key:<%s>\n", 81 delaykey[i].retry ? "delay" : "stop", 82 delaykey[i].str ? delaykey[i].str : "NULL"); 83 } 84 85 /* In order to keep up with incoming data, check timeout only 86 * when catch up. 87 */ 88 do { 89 if (tstc()) { 90 if (presskey_len < presskey_max) { 91 presskey[presskey_len++] = getc(); 92 } else { 93 for (i = 0; i < presskey_max - 1; i++) 94 presskey[i] = presskey[i + 1]; 95 96 presskey[i] = getc(); 97 } 98 } 99 100 for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i++) { 101 if (delaykey[i].len > 0 && 102 presskey_len >= delaykey[i].len && 103 memcmp(presskey + presskey_len - 104 delaykey[i].len, delaykey[i].str, 105 delaykey[i].len) == 0) { 106 debug_bootkeys("got %skey\n", 107 delaykey[i].retry ? "delay" : 108 "stop"); 109 110 /* don't retry auto boot */ 111 if (!delaykey[i].retry) 112 bootretry_dont_retry(); 113 abort = 1; 114 } 115 } 116 } while (!abort && get_ticks() <= etime); 117 118 if (!abort) 119 debug_bootkeys("key timeout\n"); 120 121 #ifdef CONFIG_SILENT_CONSOLE 122 if (abort) 123 gd->flags &= ~GD_FLG_SILENT; 124 #endif 125 126 return abort; 127 } 128 129 # else /* !defined(CONFIG_AUTOBOOT_KEYED) */ 130 131 #ifdef CONFIG_MENUKEY 132 static int menukey; 133 #endif 134 135 static int abortboot_normal(int bootdelay) 136 { 137 int abort = 0; 138 unsigned long ts; 139 140 #ifdef CONFIG_MENUPROMPT 141 printf(CONFIG_MENUPROMPT); 142 #else 143 if (bootdelay >= 0) 144 printf("Hit any key to stop autoboot: %2d ", bootdelay); 145 #endif 146 147 #if defined CONFIG_ZERO_BOOTDELAY_CHECK 148 /* 149 * Check if key already pressed 150 * Don't check if bootdelay < 0 151 */ 152 if (bootdelay >= 0) { 153 if (tstc()) { /* we got a key press */ 154 (void) getc(); /* consume input */ 155 puts("\b\b\b 0"); 156 abort = 1; /* don't auto boot */ 157 } 158 } 159 #endif 160 161 while ((bootdelay > 0) && (!abort)) { 162 --bootdelay; 163 /* delay 1000 ms */ 164 ts = get_timer(0); 165 do { 166 if (tstc()) { /* we got a key press */ 167 abort = 1; /* don't auto boot */ 168 bootdelay = 0; /* no more delay */ 169 # ifdef CONFIG_MENUKEY 170 menukey = getc(); 171 # else 172 (void) getc(); /* consume input */ 173 # endif 174 break; 175 } 176 udelay(10000); 177 } while (!abort && get_timer(ts) < 1000); 178 179 printf("\b\b\b%2d ", bootdelay); 180 } 181 182 putc('\n'); 183 184 #ifdef CONFIG_SILENT_CONSOLE 185 if (abort) 186 gd->flags &= ~GD_FLG_SILENT; 187 #endif 188 189 return abort; 190 } 191 # endif /* CONFIG_AUTOBOOT_KEYED */ 192 193 static int abortboot(int bootdelay) 194 { 195 #ifdef CONFIG_AUTOBOOT_KEYED 196 return abortboot_keyed(bootdelay); 197 #else 198 return abortboot_normal(bootdelay); 199 #endif 200 } 201 202 static void process_fdt_options(const void *blob) 203 { 204 #if defined(CONFIG_OF_CONTROL) 205 ulong addr; 206 207 /* Add an env variable to point to a kernel payload, if available */ 208 addr = fdtdec_get_config_int(gd->fdt_blob, "kernel-offset", 0); 209 if (addr) 210 setenv_addr("kernaddr", (void *)(CONFIG_SYS_TEXT_BASE + addr)); 211 212 /* Add an env variable to point to a root disk, if available */ 213 addr = fdtdec_get_config_int(gd->fdt_blob, "rootdisk-offset", 0); 214 if (addr) 215 setenv_addr("rootaddr", (void *)(CONFIG_SYS_TEXT_BASE + addr)); 216 #endif /* CONFIG_OF_CONTROL */ 217 } 218 219 const char *bootdelay_process(void) 220 { 221 char *s; 222 int bootdelay; 223 #ifdef CONFIG_BOOTCOUNT_LIMIT 224 unsigned long bootcount = 0; 225 unsigned long bootlimit = 0; 226 #endif /* CONFIG_BOOTCOUNT_LIMIT */ 227 228 #ifdef CONFIG_BOOTCOUNT_LIMIT 229 bootcount = bootcount_load(); 230 bootcount++; 231 bootcount_store(bootcount); 232 setenv_ulong("bootcount", bootcount); 233 bootlimit = getenv_ulong("bootlimit", 10, 0); 234 #endif /* CONFIG_BOOTCOUNT_LIMIT */ 235 236 s = getenv("bootdelay"); 237 bootdelay = s ? (int)simple_strtol(s, NULL, 10) : CONFIG_BOOTDELAY; 238 239 #ifdef CONFIG_OF_CONTROL 240 bootdelay = fdtdec_get_config_int(gd->fdt_blob, "bootdelay", 241 bootdelay); 242 #endif 243 244 debug("### main_loop entered: bootdelay=%d\n\n", bootdelay); 245 246 #if defined(CONFIG_MENU_SHOW) 247 bootdelay = menu_show(bootdelay); 248 #endif 249 bootretry_init_cmd_timeout(); 250 251 #ifdef CONFIG_POST 252 if (gd->flags & GD_FLG_POSTFAIL) { 253 s = getenv("failbootcmd"); 254 } else 255 #endif /* CONFIG_POST */ 256 #ifdef CONFIG_BOOTCOUNT_LIMIT 257 if (bootlimit && (bootcount > bootlimit)) { 258 printf("Warning: Bootlimit (%u) exceeded. Using altbootcmd.\n", 259 (unsigned)bootlimit); 260 s = getenv("altbootcmd"); 261 } else 262 #endif /* CONFIG_BOOTCOUNT_LIMIT */ 263 s = getenv("bootcmd"); 264 265 process_fdt_options(gd->fdt_blob); 266 stored_bootdelay = bootdelay; 267 268 return s; 269 } 270 271 void autoboot_command(const char *s) 272 { 273 debug("### main_loop: bootcmd=\"%s\"\n", s ? s : "<UNDEFINED>"); 274 275 if (stored_bootdelay != -1 && s && !abortboot(stored_bootdelay)) { 276 #if defined(CONFIG_AUTOBOOT_KEYED) && !defined(CONFIG_AUTOBOOT_KEYED_CTRLC) 277 int prev = disable_ctrlc(1); /* disable Control C checking */ 278 #endif 279 280 run_command_list(s, -1, 0); 281 282 #if defined(CONFIG_AUTOBOOT_KEYED) && !defined(CONFIG_AUTOBOOT_KEYED_CTRLC) 283 disable_ctrlc(prev); /* restore Control C checking */ 284 #endif 285 } 286 287 #ifdef CONFIG_MENUKEY 288 if (menukey == CONFIG_MENUKEY) { 289 s = getenv("menucmd"); 290 if (s) 291 run_command_list(s, -1, 0); 292 } 293 #endif /* CONFIG_MENUKEY */ 294 } 295