[PATCH v2 u-boot-mvebu 1/4] tools: kwboot: Fix MMC partitions documentation

Pali Rohár
2023-04-13T20:59:20Z

Boot configuration stored in EXT_CSD_PART_CONF register is completely
ignored by BootROM.

Fixes: fa03279e198d ("tools: kwboot: Add image type documentation")
Signed-off-by: Pali Rohár <pali@kernel.org>
---
tools/kwboot.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/tools/kwboot.c b/tools/kwboot.c
index 6bef4610ff8f..550d2494ff68 100644
--- a/tools/kwboot.c
+++ b/tools/kwboot.c
@@ -119,9 +119,12 @@
* 1024 bytes long sector sizes and also can be changed at runtime.
*
* For MMC-compatible devices, image can be stored at offset 0 or at offset
- * 2 MB. If MMC device supports HW boot partitions then image must be stored
- * on the HW partition as is configured in the EXT_CSC register (it can be
- * either boot or user data).
+ * 2 MB. If eMMC device supports HW/boot partitions then image is read from
+ * partitions in following order: Boot 1, Boot 2, RPMB, GP 1, GP 2, GP 3,
+ * GP 4, User Data, Boot 1, Boot 2. (Boot 1 and Boot 2 are really repeated).
+ * Boot configuration stored in EXT_CSD_PART_CONF eMMC register is completely
+ * ignored by the BootROM. But it sets PARTITION_ACCESS bits of that register
+ * to the selected partition from which it loaded image.
*
* Note that source address for SDIO image is stored in byte unit, like for
* any other images (except SATA). Marvell Functional Specifications for
--
2.20.1