From 3f15581faf31845029eeea2c917ea91ada714a02 Mon Sep 17 00:00:00 2001 From: Rex-BC Chen Date: Fri, 26 Nov 2021 14:18:20 +0800 Subject: soc/mediatek: Flush cache before triggering EC reset There will be no log in cbmem if we trigger ec reset on bootblock stage. Therefore, call dcache_clean_all() before triggering ec reset to flush cache to store logs on cbmem. BUG=b:207743045 TEST=show logs on cbmem Signed-off-by: Rex-BC Chen Change-Id: I1bd900beb4cc84f7121c5fb66907fa73b62517fa Reviewed-on: https://review.coreboot.org/c/coreboot/+/59683 Tested-by: build bot (Jenkins) Reviewed-by: Yu-Ping Wu --- src/soc/mediatek/common/wdt.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/src/soc/mediatek/common/wdt.c b/src/soc/mediatek/common/wdt.c index f06fbf066f..6e1b76110d 100644 --- a/src/soc/mediatek/common/wdt.c +++ b/src/soc/mediatek/common/wdt.c @@ -1,5 +1,6 @@ /* SPDX-License-Identifier: GPL-2.0-only */ +#include #include #include #include @@ -27,7 +28,10 @@ int mtk_wdt_init(void) * We trigger secondary reset by triggering WDT hardware to send signal to EC. * We do not use do_board_reset() to send signal to EC * which is controlled by software driver. + * Before triggering secondary reset, clean the data cache so the logs in cbmem + * console (either in SRAM or DRAM) can be flushed. */ + dcache_clean_all(); write32(&mtk_wdt->wdt_mode, MTK_WDT_MODE_EXTEN | MTK_WDT_MODE_KEY); write32(&mtk_wdt->wdt_swrst, MTK_WDT_SWRST_KEY); } else if (wdt_sta & MTK_WDT_STA_SW_RST) -- cgit v1.2.3