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The BROM supports forcing it to enter download-mode, if an appropriate
result/cmd-word is returned to it. There already is a series to
support this in review, so this prepares the (newly C-version) of the
back-to-bootrom code to accept a cmd to passed on to the BROM.
All the existing call-sites are adjusted to match the changed function
signature.
Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Tested-by: Andy Yan <andy.yan@rock-chips.com>
Series-changes: 2
- also covers the RK3188 (which I had originally missed)
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The RK3188 implementation previously passed the address of the stack
frame created during save_boot_params via pmu->os_reg[2]. This was not
strictly necessary, as the save_boot_params() function was called
twice (first: for TPL, saving the context for the BROM; next: for SPL,
saving the context for the TPL) and a back-to-bootrom from the SPL
would thus return to TPL.
To simplify things, we now assume that the state of the TPL is not
corrupted during SPL (the binaries are non-overlapping) and that the
SPL can safely return to TPL using the back-to-bootrom mechanism.
Consequently, the TPL should expect the SPL to return control and then
further return to the actual bootrom by performing another
back-to-bootrom transition.
Series-changes: 2
- [added in v2] chain back_to_bootrom calls for SPL, first returning
to the TPL (using the same mechanism) and the to the BROM from the
TPL
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The back-to-bootrom option is rather unfortunately named
CONFIG_ROCKCHIP_SPL_BACK_TO_BOOTROM
instead of
CONFIG_SPL_ROCKCHIP_BACK_TO_BOOTROM
To make is selectable through CONFIG_IS_ENABLED(ROCKCHIP_BACK_TO_BOOTROM),
we need to rename it. At the same time, we introduce a TPL_ variant of
the option to give us finer-grained control over when it should be used.
This change is motivated by our RK3368 boot process, which returns to
the boot ROM only from the TPL stage, but not from the SPL stage.
Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
[added fix-up for evb-rk3229_defconfig and phycore-rk3288_defconfig:]
[fixed inverted CONFIG_IS_ENABLED test for rk3288:]
Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
include/configs/rock.h: undef
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The armclk starts in slow mode (24MHz) on the rk3188, which results in U-Boot
startup taking a lot of time (U-Boot itself, but also the rc4 decoding done
in the bootrom).
With default pmic settings we can always reach a safe frequency of 600MHz
which is also the frequency the proprietary loader left the armclk at,
without needing access to the systems pmic.
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Acked-by: Simon Glass <sjg@chromium.org>
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Rockchip spl driver needs using spl_early_init().
Fixes: b3d2861e (spl: Remove overwrite of relocated malloc limit)
Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
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The rk3188 needs 3 U-Boot stages: a tpl living in 1KB of sram, a spl
the resides in the rest of the sram and loads the regular U-Boot living
in regular ram.
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Tested-by: Kever Yang <kever.yang@rock-chips.com>
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