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| author | Sascha Hauer <s.hauer@pengutronix.de> | 2016-04-29 10:53:51 +0200 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2016-05-04 11:58:46 +0200 |
| commit | f66990af3cf2e1bfda60938beeadcb98557d9487 (patch) | |
| tree | 1396f22e661ba9d8fe12ba89922b73f6ec372484 /common | |
| parent | a9b18674c0ffefd08064dff898b1f621f8c258d5 (diff) | |
| download | barebox-f66990af3cf2e1bfda60938beeadcb98557d9487.tar.gz barebox-f66990af3cf2e1bfda60938beeadcb98557d9487.tar.xz | |
bootm: Optionally add a root= option to Kernel command line
It becomes a common case that the Kernel is loaded from the filesystem
which later becomes the rootfs. This adds a possibility to let bootm
automatically append the root= option to the kernel command line. This
is done when global.bootm.appendroot is true.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'common')
| -rw-r--r-- | common/bootm.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/common/bootm.c b/common/bootm.c index 6d22aab289..cad8c73efe 100644 --- a/common/bootm.c +++ b/common/bootm.c @@ -48,6 +48,8 @@ static struct image_handler *bootm_find_handler(enum filetype filetype, return NULL; } +static int bootm_appendroot; + void bootm_data_init_defaults(struct bootm_data *data) { data->initrd_address = UIMAGE_INVALID_ADDRESS; @@ -58,6 +60,7 @@ void bootm_data_init_defaults(struct bootm_data *data) getenv_ul("global.bootm.initrd.loadaddr", &data->initrd_address); data->initrd_file = getenv_nonempty("global.bootm.initrd"); data->verify = bootm_get_verify_mode(); + data->appendroot = bootm_appendroot; } static enum bootm_verify bootm_verify_mode = BOOTM_VERIFY_HASH; @@ -576,6 +579,18 @@ int bootm_boot(struct bootm_data *bootm_data) } } + if (bootm_data->appendroot) { + char *rootarg; + + rootarg = path_get_linux_rootarg(data->os_file); + if (!IS_ERR(rootarg)) { + printf("Adding \"%s\" to Kernel commandline\n", rootarg); + globalvar_add_simple("linux.bootargs.bootm.appendroot", + rootarg); + free(rootarg); + } + } + printf("\nLoading %s '%s'", file_type_to_string(os_type), data->os_file); if (os_type == filetype_uimage && @@ -621,6 +636,7 @@ err_out: if (data->of_root_node && data->of_root_node != of_get_root_node()) of_delete_node(data->of_root_node); + globalvar_remove("linux.bootargs.bootm.appendroot"); free(data->os_file); free(data->oftree_file); free(data->initrd_file); @@ -634,6 +650,7 @@ static int bootm_init(void) globalvar_add_simple("bootm.image", NULL); globalvar_add_simple("bootm.image.loadaddr", NULL); globalvar_add_simple("bootm.oftree", NULL); + globalvar_add_simple_bool("bootm.appendroot", &bootm_appendroot); if (IS_ENABLED(CONFIG_CMD_BOOTM_INITRD)) { globalvar_add_simple("bootm.initrd", NULL); globalvar_add_simple("bootm.initrd.loadaddr", NULL); |