mk-rootfs.sh

hc

2023-12-11 072de836f53be56a70cecf70b43ae43b7ce17376

 u-boot/common/spl/spl_ab.c
..
..
@@ -319,3 +319,38 @@
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 out:
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 	return ret;
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 }
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+
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+/*
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+ * If boot A/B system fail, tries-remaining decrease 1
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+ * and do reset automatically if still bootable.
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+ */
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+int spl_ab_decrease_reset(struct blk_desc *dev_desc)
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+{
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+	AvbABData ab_data;
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+	int ret;
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+
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+	ret = spl_ab_data_read(dev_desc, &ab_data, "misc");
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+	if (ret)
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+		return ret;
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+
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+	/* If current device cannot boot, return and try other devices. */
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+	if (!spl_slot_is_bootable(&ab_data.slots[0]) &&
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+	    !spl_slot_is_bootable(&ab_data.slots[1])) {
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+		printf("A/B: no bootable slot\n");
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+		return -ENODEV;
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+	}
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+
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+	/* If current device still can boot, decrease and do reset. */
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+	ret = spl_ab_decrease_tries(dev_desc);
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+	if (ret)
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+		return ret;
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+
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+	printf("A/B: slot boot fail, do reset\n");
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+	do_reset(NULL, 0, 0, NULL);
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+
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+	/*
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+	 * Only do_reset() fail will arrive here, return a
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+	 * negative number, then enter maskrom in the caller.
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+	 */
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+	return -EINVAL;
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+}