summaryrefslogtreecommitdiff
path: root/src/soc
diff options
context:
space:
mode:
authorJulius Werner <jwerner@chromium.org>2014-11-24 13:50:46 -0800
committerStefan Reinauer <stefan.reinauer@coreboot.org>2015-04-15 16:27:23 +0200
commit2460a5564f9a5c3c30922a5faba080cedc7b726f (patch)
tree961557018fafd8bdbf67b7e40758f2fa5cb06f6b /src/soc
parent5984aad9c8a0fad5b20db7d03832d3b3510bcfd6 (diff)
downloadcoreboot-2460a5564f9a5c3c30922a5faba080cedc7b726f.tar.xz
veyron: Trigger hard reset (via GPIO) if last reboot was caused by watchdog
Like Nyan, Veyron boards use a GPIO to reset the system so that we can make the accompanying TPM reset secure and unforgeable. The normal kernel reboot driver knows that, but the SoC-internal watchdog doesn't. This patch implements a check for the global reset status register in the early bootblock and triggers a hard_reset() when it matches "first global watchdog reset" or "second global watchdog reset". Seems that the difference between the two is is a choice controlled by wdt_glb_srst_ctrl (unconfirmed), and we want this code to run in both cases. BRANCH=None BUG=chrome-os-partner:33141 TEST=Run 'mem w 0xff800000 0x9' from the command line, watch how you end up in recovery without this patch but can boot normally with it. Change-Id: Ice79648831e1e97d22325711da9e82bbf6bf3c75 Signed-off-by: Stefan Reinauer <reinauer@chromium.org> Original-Commit-Id: 5d7cb52b2c2dcb2fff0bf83fc168439dade4b1b7 Original-Change-Id: I2581bde84f0445c15896060544e9acb60de91c8c Original-Signed-off-by: Julius Werner <jwerner@chromium.org> Original-Reviewed-on: https://chromium-review.googlesource.com/231734 Original-Reviewed-by: David Hendricks <dhendrix@chromium.org> Reviewed-on: http://review.coreboot.org/9629 Tested-by: build bot (Jenkins) Reviewed-by: Marc Jones <marc.jones@se-eng.com>
Diffstat (limited to 'src/soc')
-rw-r--r--src/soc/rockchip/rk3288/clock.c6
-rw-r--r--src/soc/rockchip/rk3288/include/soc/clock.h1
2 files changed, 7 insertions, 0 deletions
diff --git a/src/soc/rockchip/rk3288/clock.c b/src/soc/rockchip/rk3288/clock.c
index fe42910dde..ab12e8c896 100644
--- a/src/soc/rockchip/rk3288/clock.c
+++ b/src/soc/rockchip/rk3288/clock.c
@@ -640,3 +640,9 @@ int rkclk_configure_vop_dclk(u32 vop_id, u32 dclk_hz)
}
return 0;
}
+
+int rkclk_was_watchdog_reset(void)
+{
+ /* Bits 5 and 4 are "second" and "first" global watchdog reset. */
+ return readl(&cru_ptr->cru_glb_rst_st) & 0x30;
+}
diff --git a/src/soc/rockchip/rk3288/include/soc/clock.h b/src/soc/rockchip/rk3288/include/soc/clock.h
index b8f892bbed..cbf4ba0df3 100644
--- a/src/soc/rockchip/rk3288/include/soc/clock.h
+++ b/src/soc/rockchip/rk3288/include/soc/clock.h
@@ -49,4 +49,5 @@ void rkclk_configure_tsadc(unsigned int hz);
void rkclk_configure_vop_aclk(u32 vop_id, u32 aclk_hz);
int rkclk_configure_vop_dclk(u32 vop_id, u32 dclk_hz);
void rkclk_configure_edp(void);
+int rkclk_was_watchdog_reset(void);
#endif /* __SOC_ROCKCHIP_RK3288_CLOCK_H__ */