diff options
| author | Yidi Lin <yidilin@chromium.org> | 2024-01-16 15:08:41 +0800 |
|---|---|---|
| committer | Felix Held <felix-coreboot@felixheld.de> | 2024-01-17 14:41:00 +0000 |
| commit | c68176c14e5ded7e8b63f4deeaf9ea714e4b9969 (patch) | |
| tree | 9d788363c37f6ffc10a42ea2b9d11c80767b9d15 /src/soc/mediatek/mt8188 | |
| parent | 3dadbb9c209d90c66edcef75bd5bc7352fed8da7 (diff) | |
soc/mediatek: Add EARLY_MMU_INIT kconfig option
Accessing RAM before mmu initialized is time consuming. During mmu
initialization, `mmu_init()` and `mmu_config_range()` write logs to the
console buffer and contribue the extra boot time.
This patch adds a kconfig option to move `mtk_mmu_init()` to
`bootblock_soc_early_init()`. When `EARLY_MMU_INIT` is enabled, mmu is
initialized before `console_init()` ready. So `mmu_init()` and
`mmu_config_range()` won't write logs to the console buffer and save the
boot time.
It saves about 65ms on Geralt with EARLY_MMU_INIT enabled.
Before:
0:1st timestamp 239,841 (0)
11:start of bootblock 239,920 (79)
12:end of bootblock 323,191 (83,271)
After:
0:1st timestamp 239,804 (0)
11:start of bootblock 239,884 (80)
12:end of bootblock 258,846 (18,962)
BUG=b:320381143
TEST=check timestamps in cbmem
Change-Id: I7f4c3c6c836f7276119698c6de362794cf4222a6
Signed-off-by: Yidi Lin <yidilin@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/79990
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
Diffstat (limited to 'src/soc/mediatek/mt8188')
| -rw-r--r-- | src/soc/mediatek/mt8188/Makefile.inc | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/soc/mediatek/mt8188/Makefile.inc b/src/soc/mediatek/mt8188/Makefile.inc index 4731fab14c..14f7d38e3b 100644 --- a/src/soc/mediatek/mt8188/Makefile.inc +++ b/src/soc/mediatek/mt8188/Makefile.inc @@ -9,7 +9,7 @@ all-$(CONFIG_SPI_FLASH) += ../common/spi.c spi.c all-y += timer.c ../common/timer_prepare.c all-y += ../common/uart.c -bootblock-y += bootblock.c +bootblock-y += ../common/bootblock.c bootblock.c bootblock-y += ../common/eint_event.c bootblock-y += ../common/lastbus_v2.c lastbus.c bootblock-y += ../common/mmu_operations.c |