To implement dual-boot strategy we need to know what is the current boot partition for U-Boot. It can be easily identified by looking at the PARTITION_CONFIG value shown by "mmc partconf dev", but I didn't find any way to use it in the boot script.
Hence, modify it, so that "mmc partboot dev part_num" command returns true if "part_num" is the current boot partition, otherwise it returns false.
Signed-off-by: Grygorii Tertychnyi grygorii.tertychnyi@leica-geosystems.com --- cmd/mmc.c | 23 ++++++++++++++++++++++- 1 file changed, 22 insertions(+), 1 deletion(-)
diff --git a/cmd/mmc.c b/cmd/mmc.c index 1529a3e05ddd..c8db008bc90d 100644 --- a/cmd/mmc.c +++ b/cmd/mmc.c @@ -792,6 +792,23 @@ static int mmc_partconf_print(struct mmc *mmc) return CMD_RET_SUCCESS; }
+static int mmc_partnum_cmp(struct mmc *mmc, u8 part_num) +{ + u8 part; + + if (mmc->part_config == MMCPART_NOAVAILABLE) { + printf("No part_config info for ver. 0x%x\n", mmc->version); + return CMD_RET_FAILURE; + } + + part = EXT_CSD_EXTRACT_BOOT_PART(mmc->part_config); + + if (part == part_num) + return CMD_RET_SUCCESS; + else + return CMD_RET_FAILURE; +} + static int do_mmc_partconf(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]) { @@ -799,7 +816,7 @@ static int do_mmc_partconf(struct cmd_tbl *cmdtp, int flag, struct mmc *mmc; u8 ack, part_num, access;
- if (argc != 2 && argc != 5) + if (argc != 2 && argc != 3 && argc != 5) return CMD_RET_USAGE;
dev = simple_strtoul(argv[1], NULL, 10); @@ -815,6 +832,10 @@ static int do_mmc_partconf(struct cmd_tbl *cmdtp, int flag,
if (argc == 2) return mmc_partconf_print(mmc); + if (argc == 3) { + part_num = simple_strtoul(argv[2], NULL, 10); + return mmc_partnum_cmp(mmc, part_num); + }
ack = simple_strtoul(argv[2], NULL, 10); part_num = simple_strtoul(argv[3], NULL, 10);