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author | Bernhard Nortmann <bernhard.nortmann@web.de> | 2016-06-09 05:37:35 (GMT) |
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committer | Hans de Goede <hdegoede@redhat.com> | 2016-07-15 06:34:34 (GMT) |
commit | 320e0570e67efbd093d7750655a758c66e9d5528 (patch) | |
tree | 5d438c122ac6c34dd49e6b9857a59f641f270ff2 /arch/arm/include/asm/arch-sunxi | |
parent | 19e99fb4ff73f648f2b316d0ddd8ee3c01496bd4 (diff) | |
download | u-boot-320e0570e67efbd093d7750655a758c66e9d5528.tar.xz |
sunxi: FEL - Add the ability to recognize and auto-import uEnv-style data
The patch converts one of the "reserved" fields in the sunxi SPL
header to a fel_uEnv_length entry. When booting over USB ("FEL
mode"), this enables the sunxi-fel utility to pass the string
length of uEnv.txt compatible data; at the same time requesting
that this data be imported into the U-Boot environment.
If parse_spl_header() in the sunxi board.c encounters a non-zero
value in this header field, it will therefore call himport_r() to
merge the string (lines) passed via FEL into the default settings.
Environment vars can be changed this way even before U-Boot will
attempt to autoboot - specifically, this also allows overriding
"bootcmd".
With fel_script_addr set and a zero fel_uEnv_length, U-Boot is
safe to assume that data in .scr format (a mkimage-type script)
was passed at fel_script_addr, and will handle it using the
existing mechanism ("bootcmd_fel").
Signed-off-by: Bernhard Nortmann <bernhard.nortmann@web.de>
Acked-by: Siarhei Siamashka <siarhei.siamashka@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Diffstat (limited to 'arch/arm/include/asm/arch-sunxi')
-rw-r--r-- | arch/arm/include/asm/arch-sunxi/spl.h | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/arch/arm/include/asm/arch-sunxi/spl.h b/arch/arm/include/asm/arch-sunxi/spl.h index ec73379..5d7ab55 100644 --- a/arch/arm/include/asm/arch-sunxi/spl.h +++ b/arch/arm/include/asm/arch-sunxi/spl.h @@ -51,7 +51,14 @@ struct boot_file_head { uint8_t spl_signature[4]; }; uint32_t fel_script_address; - uint32_t reserved1[3]; + /* + * If the fel_uEnv_length member below is set to a non-zero value, + * it specifies the size (byte count) of data at fel_script_address. + * At the same time this indicates that the data is in uEnv.txt + * compatible format, ready to be imported via "env import -t". + */ + uint32_t fel_uEnv_length; + uint32_t reserved1[2]; uint32_t boot_media; /* written here by the boot ROM */ uint32_t reserved2[5]; /* padding, align to 64 bytes */ }; |