Hi Kever,
On 9/4/22 13:49, Kever Yang wrote:
Hi Quentin,
The Kconfig from env/Kconfig
config ENV_IS_NOWHERE bool "Environment is not stored" default y if !ENV_IS_IN_EEPROM && !ENV_IS_IN_EXT4 && \ !ENV_IS_IN_FAT && !ENV_IS_IN_FLASH && \ !ENV_IS_IN_MMC && !ENV_IS_IN_NAND && \ !ENV_IS_IN_NVRAM && !ENV_IS_IN_ONENAND && \ !ENV_IS_IN_REMOTE && !ENV_IS_IN_SPI_FLASH && \ !ENV_IS_IN_UBI
I think the logic is the env parameter is stored on some kind of storage, or NOWHERE.
It's *default* to yes if none is defined. It's not a requirement.
And what you want to do is to load from the same medium as SPL boot device(location of U-Boot proper),
this could not be NOWHERE.
This can be nowhere in case the proper config option is not selected. E.g. we're booting from SPI-NOR but the ENV_IS_IN_SPI_FLASH is not set. How does one handle this scenario? Since we don't want fallbacks, it needs to be "nowhere". What you're suggesting is to let the user run a broken build and have it cryptically crash with the following error:
initcall sequence 00000000002866c0 failed at call 0000000000256b34 (err=-19)
Instead, I suggest to more gracefully error out at runtime by letting the user know that the option is not compiled in but U-Boot is still usable.
If you have another way to forbid fallbacks but not crash U-Boot in case the option is not selected, let me know.
Cheers, Quentin
Thanks,
- Kever
On 2022/9/1 21:13, Quentin Schulz wrote:
Hi Kever
On 9/1/22 15:03, Kever Yang wrote:
Hi Quentin,
On 2022/7/23 00:06, Quentin Schulz wrote:
From: Quentin Schulz quentin.schulz@theobroma-systems.com
Chances are when one boots U-Boot proper from a given storage medium, they want the same medium to be used to load and store the environment.
This basically allows to have completely separate U-Boot (TPL/SPL/U-Boot proper/environment) per storage medium which is convenient when working with recovery from SD-Card as one would just need to insert a properly configured SD-Card into the device to have access to their whole debug setup.
No fallback mechanism is provided as to not dirty other storage medium environment by mistake. However, since arch_env_get_location() is called by env_init() which is part of the pre-relocation process, a valid, non-ENVL_UNKNOWN, value shall be returned otherwise the relocation fails with the following message: initcall sequence 00000000002866c0 failed at call 0000000000256b34 (err=-19)
This valid, non-ENVL_UNKNOWN, value is ENVL_NOWHERE which requires to always select CONFIG_ENV_IS_NOWHERE otherwise this work-around does not work.
Cc: Quentin Schulz foss+uboot@0leil.net Signed-off-by: Quentin Schulz quentin.schulz@theobroma-systems.com
Depends on https://urldefense.proofpoint.com/v2/url?u=https-3A__lore.kernel.org_u-2Dboo... https://urldefense.proofpoint.com/v2/url?u=https-3A__lore.kernel.org_u-2Dboo... .../puma_rk3399/puma-rk3399.c | 37 +++++++++++++++++++ configs/puma-rk3399_defconfig | 1 + 2 files changed, 38 insertions(+)
diff --git a/board/theobroma-systems/puma_rk3399/puma-rk3399.c b/board/theobroma-systems/puma_rk3399/puma-rk3399.c index 5e5e58c88e..7ef4bac24b 100644 --- a/board/theobroma-systems/puma_rk3399/puma-rk3399.c +++ b/board/theobroma-systems/puma_rk3399/puma-rk3399.c @@ -6,6 +6,7 @@ #include <common.h> #include <dm.h> #include <env.h> +#include <env_internal.h> #include <init.h> #include <log.h> #include <misc.h> @@ -135,6 +136,42 @@ int mmc_get_env_dev(void) return CONFIG_SYS_MMC_ENV_DEV; } +#if !IS_ENABLED(CONFIG_ENV_IS_NOWHERE) +#error Please enable CONFIG_ENV_IS_NOWHERE +#endif
+enum env_location arch_env_get_location(enum env_operation op, int prio) +{ + const char *boot_device = + ofnode_read_chosen_string("u-boot,spl-boot-device");
+ if (prio > 0) + return ENVL_UNKNOWN;
+ if (!boot_device) { + debug("%s: /chosen/u-boot,spl-boot-device not set\n", + __func__); + return ENVL_NOWHERE; + }
+ debug("%s: booted from %s\n", __func__, boot_device);
+ if (IS_ENABLED(CONFIG_ENV_IS_IN_SPI_FLASH) && + !strcmp(boot_device, "/spi@ff1d0000/flash@0")) + return ENVL_SPI_FLASH;
+ if (IS_ENABLED(CONFIG_ENV_IS_IN_MMC) && + (!strcmp(boot_device, "/mmc@fe320000") || + !strcmp(boot_device, "/mmc@fe330000"))) + return ENVL_MMC;
+ printf("%s: No environment available: booted from %s but U-Boot " + "config does not allow loading environment from it.", + __func__, boot_device);
+ return ENVL_NOWHERE; +}
int misc_init_r(void) { const u32 cpuid_offset = 0x7; diff --git a/configs/puma-rk3399_defconfig b/configs/puma-rk3399_defconfig index 87d7e4f57c..e218532d70 100644 --- a/configs/puma-rk3399_defconfig +++ b/configs/puma-rk3399_defconfig @@ -44,6 +44,7 @@ CONFIG_SPL_OF_CONTROL=y CONFIG_OF_LIVE=y CONFIG_OF_SPL_REMOVE_PROPS="interrupt-parent assigned-clocks assigned-clock-rates assigned-clock-parents" CONFIG_ENV_OVERWRITE=y +CONFIG_ENV_IS_NOWHERE=y
This option is conflict with CONFIG_ENV_IS_IN_MMC, please check again where should be this board get the env.
I created the defconfig with make savedefconfig, so if you're talking about KConfig conflict, that is incorrect, there is no conflict.
If you're talking about something else, please clarify because I don't see the issue right now.
Cheers, Quentin