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spl_mmc/CONFIG_SPL_OS_BOOT: Allow environment to determine what to boot

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We add two new environment variables, falcon_args_file and
falcon_image_file, which when set will override the compiled in default
values for falcon mode.

Signed-off-by: Tom Rini <trini@ti.com>
This commit is contained in:
Tom Rini 2014-03-28 12:03:42 -04:00
parent 0092fa01a7
commit ae1590ed52
2 changed files with 31 additions and 0 deletions
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27
common/spl/spl_fat.c
View File

@ -74,11 +74,38 @@ end:
int spl_load_image_fat_os(block_dev_desc_t *block_dev, int partition)
{
int err;
__maybe_unused char *file;
err = spl_register_fat_device(block_dev, partition);
if (err)
return err;
#if defined(CONFIG_SPL_ENV_SUPPORT) && defined(CONFIG_SPL_OS_BOOT)
file = getenv("falcon_args_file");
if (file) {
err = file_fat_read(file, (void *)CONFIG_SYS_SPL_ARGS_ADDR, 0);
if (err <= 0) {
printf("spl: error reading image %s, err - %d, falling back to default\n",
file, err);
goto defaults;
}
file = getenv("falcon_image_file");
if (file) {
err = spl_load_image_fat(block_dev, partition, file);
if (err != 0) {
puts("spl: falling back to default\n");
goto defaults;
}
return 0;
} else
puts("spl: falcon_image_file not set in environment, falling back to default\n");
} else
puts("spl: falcon_args_file not set in environment, falling back to default\n");
defaults:
#endif
err = file_fat_read(CONFIG_SPL_FAT_LOAD_ARGS_NAME,
(void *)CONFIG_SYS_SPL_ARGS_ADDR, 0);
if (err <= 0) {

4
doc/README.falcon
View File

@ -89,6 +89,10 @@ mode. In this case the following variables may be supported:
boot_os : Set to yes/Yes/true/True/1 to enable booting to OS,
any other value to fall back to U-Boot (including
unset)
falcon_args_file : Filename to load as the 'args' portion of falcon mode
rather than the hard-coded value.
falcon_image_file : Filename to load as the OS image portion of falcon
mode rather than the hard-coded value.
Using spl command
-----------------