Hi,
On 2/18/21 1:35 AM, grygorii tertychnyi wrote:
This patch allows to check the current boot partition. It is useful when you use two different sets of (bootloader, kernel) images and want to boot the corresponding kernel image in boot script. E.g.:
if mmc bootpart-check ${mmcdev} 1; then echo "booted from eMMC boot0 partition" ...load kernel image1 elif mmc bootpart-check ${mmcdev} 2; then echo "booted from eMMC boot1 partition" ...load kernel image2 fi
If mmc_bootpart-check <dev> <boot_partition> is used, it's just for your bootsripts. Your patch is doing nothing...
U-boot> mmc bootpart-check 1 1 U-boot> mmc bootpart-check 1 2 U-boot> mmc bootpart-check 1 3
To use this command by other developer, it needs to be more useful than now. So i think good that displayed the bootpart value in your patch.
Then it doesn't need to use "echo booted from.." in your bootscript.
e.g) if success.. U-boot> mmc bootpart-check 1 1 Boot partition 1 enabled for boot
if fail U-boot> mmc bootpart-check 1 1 Boot partition 2 enabled for boot
Code can be the below..
switch (part_emmc) { case 0x0: printf("Device not boot enabled"); break; case 0x1: printf("Boot partition 1 ...); break; case 0x2: ... default: printf("BOOT_PARTITION_ENABLE is reserved\n"); }
Then other developer and you can get more information with this command. Also when checking is failed, it can provide which bootpart is valid. And this patch's commit-msg can be described more common, not only bootscript's case.
how about this?
Signed-off-by: Grygorii Tertychnyi grygorii.tertychnyi@leica-geosystems.com
I think better that Signed-off-by and Author's email address maintains to same.
Author: grygorii tertychnyi grembeter@gmail.com Date: Wed Feb 17 17:35:16 2021 +0100
cmd: mmc: add mmc bootpart-check
Best Regards, Jaehoon Chung
v2:
- renamed the command, it is "bootpart-check" now
- added <> to mandatory arguments help string
- added more details to commit message
cmd/mmc.c | 39 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+)
diff --git a/cmd/mmc.c b/cmd/mmc.c index 1529a3e05ddd..3332dee4b130 100644 --- a/cmd/mmc.c +++ b/cmd/mmc.c @@ -771,6 +771,41 @@ static int do_mmc_boot_resize(struct cmd_tbl *cmdtp, int flag, return CMD_RET_SUCCESS; }
+static int do_mmc_boot_check(struct cmd_tbl *cmdtp, int flag,
int argc, char *const argv[])+{
- int dev;
- struct mmc *mmc;
- u8 part_args, part_emmc;
- if (argc != 3)
return CMD_RET_USAGE;- dev = simple_strtoul(argv[1], NULL, 10);
- mmc = init_mmc_device(dev, false);
- if (!mmc)
return CMD_RET_FAILURE;- if (IS_SD(mmc)) {
printf("It is not an eMMC device\n");return CMD_RET_FAILURE;- }
- if (mmc->part_config == MMCPART_NOAVAILABLE) {
printf("No part_config info for ver. 0x%x\n", mmc->version);return CMD_RET_FAILURE;- }
- part_emmc = EXT_CSD_EXTRACT_BOOT_PART(mmc->part_config);
- part_args = simple_strtoul(argv[2], NULL, 10);
- if (part_emmc == part_args)
return CMD_RET_SUCCESS;- else
return CMD_RET_FAILURE;+}
static int mmc_partconf_print(struct mmc *mmc) { u8 ack, access, part; @@ -952,6 +987,7 @@ static struct cmd_tbl cmd_mmc[] = { #endif #ifdef CONFIG_SUPPORT_EMMC_BOOT U_BOOT_CMD_MKENT(bootbus, 5, 0, do_mmc_bootbus, "", ""),
- U_BOOT_CMD_MKENT(bootpart-check, 3, 0, do_mmc_boot_check, "", ""), U_BOOT_CMD_MKENT(bootpart-resize, 4, 0, do_mmc_boot_resize, "", ""), U_BOOT_CMD_MKENT(partconf, 5, 0, do_mmc_partconf, "", ""), U_BOOT_CMD_MKENT(rst-function, 3, 0, do_mmc_rst_func, "", ""),
@@ -1019,6 +1055,9 @@ U_BOOT_CMD( #ifdef CONFIG_SUPPORT_EMMC_BOOT "mmc bootbus dev boot_bus_width reset_boot_bus_width boot_mode\n" " - Set the BOOT_BUS_WIDTH field of the specified device\n"
- "mmc bootpart-check <dev> <boot_partition>\n"
- " - Return success if the given boot_partition value matches BOOT_PARTITION_ENABLE\n"
- " bit field of the specified device\n" "mmc bootpart-resize <dev> <boot part size MB> <RPMB part size MB>\n" " - Change sizes of boot and RPMB partitions of specified device\n" "mmc partconf dev [boot_ack boot_partition partition_access]\n"