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| author | Julius Werner <jwerner@chromium.org> | 2018-05-14 11:43:30 -0700 |
|---|---|---|
| committer | Julius Werner <jwerner@chromium.org> | 2018-05-22 02:44:33 +0000 |
| commit | 8f25a6680e23663f4c88f7fe61a7a62e8fe284c4 (patch) | |
| tree | bb18eb627d3381267506d9fa1ff762c0c905f30d /src/soc/rockchip/rk3399/Kconfig | |
| parent | 99f4683adf3203d11c164b15a5455e778709a3e0 (diff) | |
| download | coreboot-8f25a6680e23663f4c88f7fe61a7a62e8fe284c4.tar.xz | |
rk3399: Enable bootblock compression
This patch enables the new bootblock compression feature on RK3399,
which requires moving MMU initialization into the decompressor stage and
linking the decompressor (rather than the bootblock) into the entry
point jumped to by the masked ROM.
RK3399's masked ROM seems to be using a bitbang SPI driver to load us
(very long pauses between clocking in each byte), with an effective data
rate of about 1Mbit. Bootblock loading time (as measured on a SPI
analyzer) is reduced by almost 100ms (about a third), while the
decompression time is trivial (under 1ms).
Change-Id: I48967ca5bb51cc4481d69dbacb4ca3c6b96cccea
Signed-off-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://review.coreboot.org/26341
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Diffstat (limited to 'src/soc/rockchip/rk3399/Kconfig')
| -rw-r--r-- | src/soc/rockchip/rk3399/Kconfig | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/src/soc/rockchip/rk3399/Kconfig b/src/soc/rockchip/rk3399/Kconfig index 7bc923efce..1d2960be1f 100644 --- a/src/soc/rockchip/rk3399/Kconfig +++ b/src/soc/rockchip/rk3399/Kconfig @@ -13,6 +13,7 @@ config SOC_ROCKCHIP_RK3399 select HAVE_MONOTONIC_TIMER select UART_OVERRIDE_REFCLK select HAVE_LINEAR_FRAMEBUFFER if MAINBOARD_DO_NATIVE_VGA_INIT + select COMPRESS_BOOTBLOCK if SOC_ROCKCHIP_RK3399 |