[coreboot-gerrit] Patch set updated for coreboot: soc/intel/apollolake: provide fake PM1 SMI status bit
Aaron Durbin (adurbin@chromium.org)
gerrit at coreboot.org
Sat Jun 11 05:36:13 CEST 2016
Aaron Durbin (adurbin at chromium.org) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/15155
-gerrit
commit cf4682b6830988424b985fcf55b9b2f241132cd2
Author: Aaron Durbin <adurbin at chromium.org>
Date: Fri Jun 10 18:04:21 2016 -0500
soc/intel/apollolake: provide fake PM1 SMI status bit
It appears that PM1 is not wired up to the SMI status register, but
it does definitely cuase SMIs to trigger. Therefore, provide a fake
PM1 status bit by checking the power button status when SMI status
is indicating no status as well as the PM1 control indicating that
SCI mode is not enabled.
BUG=chrome-os-partner:54262
TEST=Smashed power button on reef to cause SMI in firmware. No longer
loops infinitely with constant SMIs firing.
Change-Id: I9aa1b5f79b651cbc19a2d3353d9ef65429386889
Signed-off-by: Aaron Durbin <adurbin at chromium.org>
---
src/soc/intel/apollolake/include/soc/pm.h | 1 +
src/soc/intel/apollolake/pmutil.c | 19 ++++++++++++++++++-
src/soc/intel/apollolake/smihandler.c | 1 +
3 files changed, 20 insertions(+), 1 deletion(-)
diff --git a/src/soc/intel/apollolake/include/soc/pm.h b/src/soc/intel/apollolake/include/soc/pm.h
index c889453..856872e 100644
--- a/src/soc/intel/apollolake/include/soc/pm.h
+++ b/src/soc/intel/apollolake/include/soc/pm.h
@@ -100,6 +100,7 @@
#define MC_SMI_STS 12
#define GPIO_UNLOCK_SMI_STS 11
#define GPIO_SMI_STS 10
+#define FAKE_PM1_SMI_STS 8
#define SWSMI_TMR_SMI_STS 6
#define APM_SMI_STS 5
#define SLP_SMI_STS 4
diff --git a/src/soc/intel/apollolake/pmutil.c b/src/soc/intel/apollolake/pmutil.c
index bebc1c7..6e47911 100644
--- a/src/soc/intel/apollolake/pmutil.c
+++ b/src/soc/intel/apollolake/pmutil.c
@@ -60,6 +60,7 @@ static uint32_t print_smi_status(uint32_t smi_sts)
[SLP_SMI_STS] = "SLP_SMI",
[APM_SMI_STS] = "APM",
[SWSMI_TMR_SMI_STS] = "SWSMI_TMR",
+ [FAKE_PM1_SMI_STS] = "PM1",
[GPIO_SMI_STS]= "GPIO_SMI",
[GPIO_UNLOCK_SMI_STS]= "GPIO_UNLOCK_SSMI",
[MC_SMI_STS] = "MCSMI",
@@ -96,7 +97,23 @@ static uint32_t reset_smi_status(void)
uint32_t clear_smi_status(void)
{
- return print_smi_status(reset_smi_status());
+ uint32_t sts = reset_smi_status();
+
+ /*
+ * Check for power button status if nothing else is indicating an SMI
+ * and SMIs aren't turned into SCIs. Apparently, there is no PM1 status
+ * bit in the SMI status register. That makes things difficult for
+ * determining if the power button caused an SMI.
+ */
+ if (sts == 0 && !(inl(ACPI_PMIO_BASE + PM1_CNT) & SCI_EN)) {
+ uint16_t pm1_sts = inw(ACPI_PMIO_BASE + PM1_STS);
+
+ /* Fake PM1 status bit if power button pressed. */
+ if (pm1_sts & PWRBTN_STS)
+ sts |= (1 << FAKE_PM1_SMI_STS);
+ }
+
+ return print_smi_status(sts);
}
uint32_t get_smi_en(void)
diff --git a/src/soc/intel/apollolake/smihandler.c b/src/soc/intel/apollolake/smihandler.c
index fd175e3..1521920 100644
--- a/src/soc/intel/apollolake/smihandler.c
+++ b/src/soc/intel/apollolake/smihandler.c
@@ -46,6 +46,7 @@ const struct smm_save_state_ops *get_smm_save_state_ops(void)
const smi_handler_t southbridge_smi[32] = {
[SLP_SMI_STS] = southbridge_smi_sleep,
[APM_SMI_STS] = southbridge_smi_apmc,
+ [FAKE_PM1_SMI_STS] = southbridge_smi_pm1,
[TCO_SMI_STS] = southbridge_smi_tco,
[PERIODIC_SMI_STS] = southbridge_smi_periodic,
};
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