From: Corneliu Doban corneliu.doban@broadcom.com
Add enumeration of gpt partitions and saving this information into U-Boot variables.
Signed-off-by: Corneliu Doban corneliu.doban@broadcom.com Signed-off-by: Vladimir Olovyannikov vladimir.olovyannikov@broadcom.com --- cmd/gpt.c | 95 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 95 insertions(+)
diff --git a/cmd/gpt.c b/cmd/gpt.c index 0c4349f4b2..061ffaa757 100644 --- a/cmd/gpt.c +++ b/cmd/gpt.c @@ -2,6 +2,8 @@ /* * cmd_gpt.c -- GPT (GUID Partition Table) handling command * + * Copyright (C) 2019 Broadcom + * author: Corneliu Doban corneliu.doban@broadcom.com * Copyright (C) 2015 * Lukasz Majewski l.majewski@majess.pl * @@ -804,6 +806,88 @@ static int do_rename_gpt_parts(struct blk_desc *dev_desc, char *subcomm, } #endif
+/* + * Enumerate partition names into environment variable. + */ +static int gpt_enumerate(struct blk_desc *blk_dev_desc) +{ + disk_partition_t pinfo; + struct part_driver *first_drv = + ll_entry_start(struct part_driver, part_driver); + const int n_drvs = ll_entry_count(struct part_driver, part_driver); + struct part_driver *part_drv; + char part_list[2048]; + + part_list[0] = 0; + + for (part_drv = first_drv; part_drv != first_drv + n_drvs; part_drv++) { + int ret; + int i; + + for (i = 1; i < part_drv->max_entries; i++) { + ret = part_drv->get_info(blk_dev_desc, i, &pinfo); + if (ret != 0) { + /* no more entries in table */ + break; + } + strcat(part_list, (const char *)pinfo.name); + strcat(part_list, " "); + } + } + if (strlen(part_list) > 0) + part_list[strlen(part_list) - 1] = 0; + debug("setenv gpt_partition_list %s\n", part_list); + env_set("gpt_partition_list", part_list); + return 0; +} + +/* + * Dynamically setup environment variables for name, index, offset and size + * for partition in GPT table after running "gpt setenv" for a partition name. + * gpt_partition_name, gpt_partition_entry, gpt_partition_addr and + * gpt_partition_size environment variables will be set. + */ +static int gpt_setenv(struct blk_desc *blk_dev_desc, const char *name) +{ + disk_partition_t pinfo; + struct part_driver *first_drv = + ll_entry_start(struct part_driver, part_driver); + const int n_drvs = ll_entry_count(struct part_driver, part_driver); + struct part_driver *part_drv; + char buf[32]; + + for (part_drv = first_drv; part_drv != first_drv + n_drvs; part_drv++) { + int ret; + int i; + + for (i = 1; i < part_drv->max_entries; i++) { + ret = part_drv->get_info(blk_dev_desc, i, &pinfo); + + if (ret != 0) { + /* no more entries in table */ + break; + } + if (strcmp(name, (const char *)pinfo.name) == 0) { + /* match found, setup environment variables */ + sprintf(buf, LBAF, pinfo.start); + debug("setenv gpt_partition_addr %s\n", buf); + env_set("gpt_partition_addr", buf); + sprintf(buf, LBAF, pinfo.size); + debug("setenv gpt_partition_size %s\n", buf); + env_set("gpt_partition_size", buf); + sprintf(buf, "%d", i); + debug("setenv gpt_partition_entry %s\n", buf); + env_set("gpt_partition_entry", buf); + sprintf(buf, "%s", pinfo.name); + debug("setenv gpt_partition_name %s\n", buf); + env_set("gpt_partition_name", buf); + return 0; + } + } + } + return -1; +} + /** * do_gpt(): Perform GPT operations * @@ -855,6 +939,10 @@ static int do_gpt(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) (strcmp(argv[1], "rename") == 0)) { ret = do_rename_gpt_parts(blk_dev_desc, argv[1], argv[4], argv[5]); #endif + } else if ((strcmp(argv[1], "setenv") == 0)) { + ret = gpt_setenv(blk_dev_desc, argv[4]); + } else if ((strcmp(argv[1], "enumerate") == 0)) { + ret = gpt_enumerate(blk_dev_desc); } else { return CMD_RET_USAGE; } @@ -897,4 +985,11 @@ U_BOOT_CMD(gpt, CONFIG_SYS_MAXARGS, 1, do_gpt, " gpt swap mmc 0 foo bar\n" " gpt rename mmc 0 3 foo\n" #endif + " gpt setenv mmc 0 $name\n" + " - setup environment variables for partition $name:\n" + " gpt_partition_addr, gpt_partition_size,\n" + " gpt_partition_name, gpt_partition_entry\n" + " gpt enumerate mmc 0\n" + " - store list of partitions to gpt_partition_list environment variable\n" + ); -- 2.17.1