bootstd: Introduce programmatic boot

At present bootstd requires CONFIG_CMDLINE to operate. Add a new
'programmatic' boot which can be used when no command line is available.
For now it does almost nothing, since most bootmeths require the
command line.

Signed-off-by: Simon Glass <sjg@chromium.org>

1 files changed, 51 insertions, 0 deletions

diff --git a/boot/prog_boot.c b/boot/prog_boot.c
new file mode 100644
index 00000000000..045554b93db
--- /dev/null
+++ b/boot/prog_boot.c
@@ -0,0 +1,51 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2021 Google LLC
+ * Written by Simon Glass <sjg@chromium.org>
+ */
+
+#define LOG_CATEGORY UCLASS_BOOTSTD
+
+#include <bootflow.h>
+#include <bootstd.h>
+#include <command.h>
+#include <dm.h>
+
+/*
+ * show_bootmeths() - List available bootmeths
+ *
+ * We could refactor this to use do_bootmeth_list() if more detail (or ordering)
+ * are needed
+ */
+static void show_bootmeths(void)
+{
+	struct udevice *dev;
+	struct uclass *uc;
+
+	printf("Bootmeths: ");
+	uclass_id_foreach_dev(UCLASS_BOOTMETH, dev, uc)
+		printf(" %s", dev->name);
+	printf("\n");
+}
+
+int bootstd_prog_boot(void)
+{
+	struct bootflow_iter iter;
+	struct bootflow bflow;
+	int ret, flags, i;
+
+	printf("Programmatic boot starting\n");
+	show_bootmeths();
+	flags = BOOTFLOWIF_HUNT | BOOTFLOWIF_SHOW | BOOTFLOWIF_SKIP_GLOBAL;
+
+	bootstd_clear_glob();
+	for (i = 0, ret = bootflow_scan_first(NULL, NULL, &iter, flags, &bflow);
+	     i < 1000 && ret != -ENODEV;
+	     i++, ret = bootflow_scan_next(&iter, &bflow)) {
+		if (!bflow.err)
+			bootflow_run_boot(&iter, &bflow);
+		bootflow_free(&bflow);
+	}
+
+	return -EFAULT;
+}