--- /dev/null
+/*
+ * (C) Copyright 2000
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <cli.h>
+#include <fdtdec.h>
+#include <menu.h>
+#include <post.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#define MAX_DELAY_STOP_STR 32
+
+#ifndef DEBUG_BOOTKEYS
+#define DEBUG_BOOTKEYS 0
+#endif
+#define debug_bootkeys(fmt, args...) \
+ debug_cond(DEBUG_BOOTKEYS, fmt, ##args)
+
+/***************************************************************************
+ * Watch for 'delay' seconds for autoboot stop or autoboot delay string.
+ * returns: 0 - no key string, allow autoboot 1 - got key string, abort
+ */
+# if defined(CONFIG_AUTOBOOT_KEYED)
+static int abortboot_keyed(int bootdelay)
+{
+ int abort = 0;
+ uint64_t etime = endtick(bootdelay);
+ struct {
+ char *str;
+ u_int len;
+ int retry;
+ }
+ delaykey[] = {
+ { str: getenv("bootdelaykey"), retry: 1 },
+ { str: getenv("bootdelaykey2"), retry: 1 },
+ { str: getenv("bootstopkey"), retry: 0 },
+ { str: getenv("bootstopkey2"), retry: 0 },
+ };
+
+ char presskey[MAX_DELAY_STOP_STR];
+ u_int presskey_len = 0;
+ u_int presskey_max = 0;
+ u_int i;
+
+#ifndef CONFIG_ZERO_BOOTDELAY_CHECK
+ if (bootdelay == 0)
+ return 0;
+#endif
+
+# ifdef CONFIG_AUTOBOOT_PROMPT
+ printf(CONFIG_AUTOBOOT_PROMPT);
+# endif
+
+# ifdef CONFIG_AUTOBOOT_DELAY_STR
+ if (delaykey[0].str == NULL)
+ delaykey[0].str = CONFIG_AUTOBOOT_DELAY_STR;
+# endif
+# ifdef CONFIG_AUTOBOOT_DELAY_STR2
+ if (delaykey[1].str == NULL)
+ delaykey[1].str = CONFIG_AUTOBOOT_DELAY_STR2;
+# endif
+# ifdef CONFIG_AUTOBOOT_STOP_STR
+ if (delaykey[2].str == NULL)
+ delaykey[2].str = CONFIG_AUTOBOOT_STOP_STR;
+# endif
+# ifdef CONFIG_AUTOBOOT_STOP_STR2
+ if (delaykey[3].str == NULL)
+ delaykey[3].str = CONFIG_AUTOBOOT_STOP_STR2;
+# endif
+
+ for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i++) {
+ delaykey[i].len = delaykey[i].str == NULL ?
+ 0 : strlen(delaykey[i].str);
+ delaykey[i].len = delaykey[i].len > MAX_DELAY_STOP_STR ?
+ MAX_DELAY_STOP_STR : delaykey[i].len;
+
+ presskey_max = presskey_max > delaykey[i].len ?
+ presskey_max : delaykey[i].len;
+
+ debug_bootkeys("%s key:<%s>\n",
+ delaykey[i].retry ? "delay" : "stop",
+ delaykey[i].str ? delaykey[i].str : "NULL");
+ }
+
+ /* In order to keep up with incoming data, check timeout only
+ * when catch up.
+ */
+ do {
+ if (tstc()) {
+ if (presskey_len < presskey_max) {
+ presskey[presskey_len++] = getc();
+ } else {
+ for (i = 0; i < presskey_max - 1; i++)
+ presskey[i] = presskey[i + 1];
+
+ presskey[i] = getc();
+ }
+ }
+
+ for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i++) {
+ if (delaykey[i].len > 0 &&
+ presskey_len >= delaykey[i].len &&
+ memcmp(presskey + presskey_len -
+ delaykey[i].len, delaykey[i].str,
+ delaykey[i].len) == 0) {
+ debug_bootkeys("got %skey\n",
+ delaykey[i].retry ? "delay" :
+ "stop");
+
+# ifdef CONFIG_BOOT_RETRY_TIME
+ /* don't retry auto boot */
+ if (!delaykey[i].retry)
+ bootretry_dont_retry();
+# endif
+ abort = 1;
+ }
+ }
+ } while (!abort && get_ticks() <= etime);
+
+ if (!abort)
+ debug_bootkeys("key timeout\n");
+
+#ifdef CONFIG_SILENT_CONSOLE
+ if (abort)
+ gd->flags &= ~GD_FLG_SILENT;
+#endif
+
+ return abort;
+}
+
+# else /* !defined(CONFIG_AUTOBOOT_KEYED) */
+
+#ifdef CONFIG_MENUKEY
+static int menukey;
+#endif
+
+static int abortboot_normal(int bootdelay)
+{
+ int abort = 0;
+ unsigned long ts;
+
+#ifdef CONFIG_MENUPROMPT
+ printf(CONFIG_MENUPROMPT);
+#else
+ if (bootdelay >= 0)
+ printf("Hit any key to stop autoboot: %2d ", bootdelay);
+#endif
+
+#if defined CONFIG_ZERO_BOOTDELAY_CHECK
+ /*
+ * Check if key already pressed
+ * Don't check if bootdelay < 0
+ */
+ if (bootdelay >= 0) {
+ if (tstc()) { /* we got a key press */
+ (void) getc(); /* consume input */
+ puts("\b\b\b 0");
+ abort = 1; /* don't auto boot */
+ }
+ }
+#endif
+
+ while ((bootdelay > 0) && (!abort)) {
+ --bootdelay;
+ /* delay 1000 ms */
+ ts = get_timer(0);
+ do {
+ if (tstc()) { /* we got a key press */
+ abort = 1; /* don't auto boot */
+ bootdelay = 0; /* no more delay */
+# ifdef CONFIG_MENUKEY
+ menukey = getc();
+# else
+ (void) getc(); /* consume input */
+# endif
+ break;
+ }
+ udelay(10000);
+ } while (!abort && get_timer(ts) < 1000);
+
+ printf("\b\b\b%2d ", bootdelay);
+ }
+
+ putc('\n');
+
+#ifdef CONFIG_SILENT_CONSOLE
+ if (abort)
+ gd->flags &= ~GD_FLG_SILENT;
+#endif
+
+ return abort;
+}
+# endif /* CONFIG_AUTOBOOT_KEYED */
+
+static int abortboot(int bootdelay)
+{
+#ifdef CONFIG_AUTOBOOT_KEYED
+ return abortboot_keyed(bootdelay);
+#else
+ return abortboot_normal(bootdelay);
+#endif
+}
+
+/*
+ * Runs the given boot command securely. Specifically:
+ * - Doesn't run the command with the shell (run_command or parse_string_outer),
+ * since that's a lot of code surface that an attacker might exploit.
+ * Because of this, we don't do any argument parsing--the secure boot command
+ * has to be a full-fledged u-boot command.
+ * - Doesn't check for keypresses before booting, since that could be a
+ * security hole; also disables Ctrl-C.
+ * - Doesn't allow the command to return.
+ *
+ * Upon any failures, this function will drop into an infinite loop after
+ * printing the error message to console.
+ */
+
+#if defined(CONFIG_OF_CONTROL)
+static void secure_boot_cmd(char *cmd)
+{
+ cmd_tbl_t *cmdtp;
+ int rc;
+
+ if (!cmd) {
+ printf("## Error: Secure boot command not specified\n");
+ goto err;
+ }
+
+ /* Disable Ctrl-C just in case some command is used that checks it. */
+ disable_ctrlc(1);
+
+ /* Find the command directly. */
+ cmdtp = find_cmd(cmd);
+ if (!cmdtp) {
+ printf("## Error: \"%s\" not defined\n", cmd);
+ goto err;
+ }
+
+ /* Run the command, forcing no flags and faking argc and argv. */
+ rc = (cmdtp->cmd)(cmdtp, 0, 1, &cmd);
+
+ /* Shouldn't ever return from boot command. */
+ printf("## Error: \"%s\" returned (code %d)\n", cmd, rc);
+
+err:
+ /*
+ * Not a whole lot to do here. Rebooting won't help much, since we'll
+ * just end up right back here. Just loop.
+ */
+ hang();
+}
+
+static void process_fdt_options(const void *blob)
+{
+ ulong addr;
+
+ /* Add an env variable to point to a kernel payload, if available */
+ addr = fdtdec_get_config_int(gd->fdt_blob, "kernel-offset", 0);
+ if (addr)
+ setenv_addr("kernaddr", (void *)(CONFIG_SYS_TEXT_BASE + addr));
+
+ /* Add an env variable to point to a root disk, if available */
+ addr = fdtdec_get_config_int(gd->fdt_blob, "rootdisk-offset", 0);
+ if (addr)
+ setenv_addr("rootaddr", (void *)(CONFIG_SYS_TEXT_BASE + addr));
+}
+#endif /* CONFIG_OF_CONTROL */
+
+void bootdelay_process(void)
+{
+#ifdef CONFIG_OF_CONTROL
+ char *env;
+#endif
+ char *s;
+ int bootdelay;
+#ifdef CONFIG_BOOTCOUNT_LIMIT
+ unsigned long bootcount = 0;
+ unsigned long bootlimit = 0;
+#endif /* CONFIG_BOOTCOUNT_LIMIT */
+
+#ifdef CONFIG_BOOTCOUNT_LIMIT
+ bootcount = bootcount_load();
+ bootcount++;
+ bootcount_store(bootcount);
+ setenv_ulong("bootcount", bootcount);
+ bootlimit = getenv_ulong("bootlimit", 10, 0);
+#endif /* CONFIG_BOOTCOUNT_LIMIT */
+
+ s = getenv("bootdelay");
+ bootdelay = s ? (int)simple_strtol(s, NULL, 10) : CONFIG_BOOTDELAY;
+
+#ifdef CONFIG_OF_CONTROL
+ bootdelay = fdtdec_get_config_int(gd->fdt_blob, "bootdelay",
+ bootdelay);
+#endif
+
+ debug("### main_loop entered: bootdelay=%d\n\n", bootdelay);
+
+#if defined(CONFIG_MENU_SHOW)
+ bootdelay = menu_show(bootdelay);
+#endif
+# ifdef CONFIG_BOOT_RETRY_TIME
+ init_cmd_timeout();
+# endif /* CONFIG_BOOT_RETRY_TIME */
+
+#ifdef CONFIG_POST
+ if (gd->flags & GD_FLG_POSTFAIL) {
+ s = getenv("failbootcmd");
+ } else
+#endif /* CONFIG_POST */
+#ifdef CONFIG_BOOTCOUNT_LIMIT
+ if (bootlimit && (bootcount > bootlimit)) {
+ printf("Warning: Bootlimit (%u) exceeded. Using altbootcmd.\n",
+ (unsigned)bootlimit);
+ s = getenv("altbootcmd");
+ } else
+#endif /* CONFIG_BOOTCOUNT_LIMIT */
+ s = getenv("bootcmd");
+#ifdef CONFIG_OF_CONTROL
+ /* Allow the fdt to override the boot command */
+ env = fdtdec_get_config_string(gd->fdt_blob, "bootcmd");
+ if (env)
+ s = env;
+
+ process_fdt_options(gd->fdt_blob);
+
+ /*
+ * If the bootsecure option was chosen, use secure_boot_cmd().
+ * Always use 'env' in this case, since bootsecure requres that the
+ * bootcmd was specified in the FDT too.
+ */
+ if (fdtdec_get_config_int(gd->fdt_blob, "bootsecure", 0))
+ secure_boot_cmd(env);
+
+#endif /* CONFIG_OF_CONTROL */
+
+ debug("### main_loop: bootcmd=\"%s\"\n", s ? s : "<UNDEFINED>");
+
+ if (bootdelay != -1 && s && !abortboot(bootdelay)) {
+#if defined(CONFIG_AUTOBOOT_KEYED) && !defined(CONFIG_AUTOBOOT_KEYED_CTRLC)
+ int prev = disable_ctrlc(1); /* disable Control C checking */
+#endif
+
+ run_command_list(s, -1, 0);
+
+#if defined(CONFIG_AUTOBOOT_KEYED) && !defined(CONFIG_AUTOBOOT_KEYED_CTRLC)
+ disable_ctrlc(prev); /* restore Control C checking */
+#endif
+ }
+
+#ifdef CONFIG_MENUKEY
+ if (menukey == CONFIG_MENUKEY) {
+ s = getenv("menucmd");
+ if (s)
+ run_command_list(s, -1, 0);
+ }
+#endif /* CONFIG_MENUKEY */
+}
projects / karo-tx-uboot.git / blobdiff