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authorSimon Glass <sjg@chromium.org>2017-08-03 21:21:58 +0300
committerTom Rini <trini@konsulko.com>2017-08-15 15:18:53 +0300
commit4415f1d1f1c57d43f6bc8ff156554c2b2da45b52 (patch)
tree0fdd6865c364cb7b68af1e9240a997a0fd686880 /env/nvram.c
parent42a8180d19ad8f45b4639015050bc709caa4f32c (diff)
downloadu-boot-4415f1d1f1c57d43f6bc8ff156554c2b2da45b52.tar.xz
env: Create a location driver for each location
Set up a location driver for each supported environment location. At present this just points to the global functions and is not used. A later patch will switch this over to use private functions in each driver. There are several special cases here in various drivers to handle peculiarities of certain boards: 1. Some boards define CONFIG_ENV_IS_IN_FAT and CONFIG_SPL_ENV_SUPPORT but do not actually load the environment in SPL. The env load code was optimised out before but with the driver, it is not. Therefore a special case is added to env/fat.c. The correct fix (depending on board testing might be to disable CONFIG_SPL_ENV_SUPPORT. 2. A similar situations happens with CONFIG_ENV_IS_IN_FLASH. Some boards do not actually load the environment in SPL, so to reduce code size we need to drop that code. A similar fix may be possible with these boards, or it may be possible to adjust the environment CONFIG settings. Added to the above is that the CONFIG_SPL_ENV_SUPPORT option does not apply when the environment is in flash. Obviously the above has been discovered through painful and time-consuming trial and error. Hopefully board maintainers can take a look and figure out what is actually needed. Signed-off-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'env/nvram.c')
-rw-r--r--env/nvram.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/env/nvram.c b/env/nvram.c
index d046c9393c..4f45eae73e 100644
--- a/env/nvram.c
+++ b/env/nvram.c
@@ -112,3 +112,13 @@ int env_init(void)
return 0;
}
+
+U_BOOT_ENV_LOCATION(nvram) = {
+ .location = ENVL_NVRAM,
+#ifdef CONFIG_SYS_NVRAM_ACCESS_ROUTINE
+ .get_char = env_get_char_spec,
+#endif
+ .load = env_relocate_spec,
+ .save = env_save_ptr(saveenv),
+ .init = env_init,
+};