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authorMarshall Dawson <marshall.dawson@scarletltd.com>2018-03-20 10:27:41 -0600
committerPatrick Georgi <pgeorgi@google.com>2018-03-22 09:01:03 +0000
commit70f051f236dd483536681c19ff5d1ba1e6c99034 (patch)
tree1d0abf0d93292bef0b032439dbc32cf9641981f5
parent5479525c74ce301754aee8a0955f258bdb751614 (diff)
downloadcoreboot-70f051f236dd483536681c19ff5d1ba1e6c99034.tar.xz
amd/stoneyridge: Add PM1 wake status to boot log
Print the wake status bits to the console. The format is kept similar to Intel's to maintain compatilibity with inspection utilities. Add relevant wake events from the register to the ELOG. Clear the register before continuing. TEST=Inspect console and ELOG for Grunt BUG=b:75020968 Change-Id: Idc9d12326abb290e4f7a5c60677eb6e057d475b2 Signed-off-by: Marshall Dawson <marshalldawson3rd@gmail.com> Reviewed-on: https://review.coreboot.org/25300 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Martin Roth <martinroth@google.com> Reviewed-by: Aaron Durbin <adurbin@chromium.org> Reviewed-by: Marc Jones <marc@marcjonesconsulting.com>
-rw-r--r--src/soc/amd/stoneyridge/southbridge.c71
1 files changed, 71 insertions, 0 deletions
diff --git a/src/soc/amd/stoneyridge/southbridge.c b/src/soc/amd/stoneyridge/southbridge.c
index 55e39569d0..a2a54c211c 100644
--- a/src/soc/amd/stoneyridge/southbridge.c
+++ b/src/soc/amd/stoneyridge/southbridge.c
@@ -23,6 +23,7 @@
#include <device/pci_ids.h>
#include <device/pci_ops.h>
#include <cbmem.h>
+#include <elog.h>
#include <amdblocks/amd_pci_util.h>
#include <soc/southbridge.h>
#include <soc/smi.h>
@@ -604,9 +605,79 @@ static void sb_init_acpi_ports(void)
PM_ACPI_TIMER_EN_EN);
}
+static void print_num_status_bits(int num_bits, uint32_t status,
+ const char *const bit_names[])
+{
+ int i;
+
+ if (!status)
+ return;
+
+ for (i = num_bits - 1; i >= 0; i--) {
+ if (status & (1 << i)) {
+ if (bit_names[i])
+ printk(BIOS_DEBUG, "%s ", bit_names[i]);
+ else
+ printk(BIOS_DEBUG, "BIT%d ", i);
+ }
+ }
+}
+
+static uint16_t reset_pm1_status(void)
+{
+ uint16_t pm1_sts = inw(ACPI_PM_EVT_BLK);
+ outw(pm1_sts, ACPI_PM_EVT_BLK);
+ return pm1_sts;
+}
+
+static uint16_t print_pm1_status(uint16_t pm1_sts)
+{
+ static const char *const pm1_sts_bits[] = {
+ [0] = "TMROF",
+ [4] = "BMSTATUS",
+ [5] = "GBL",
+ [8] = "PWRBTN",
+ [10] = "RTC",
+ [14] = "PCIEXPWAK",
+ [15] = "WAK",
+ };
+
+ if (!pm1_sts)
+ return 0;
+
+ printk(BIOS_SPEW, "PM1_STS: ");
+ print_num_status_bits(ARRAY_SIZE(pm1_sts_bits), pm1_sts, pm1_sts_bits);
+ printk(BIOS_SPEW, "\n");
+
+ return pm1_sts;
+}
+
+static void sb_log_pm1_status(uint16_t pm1_sts)
+{
+ if (!IS_ENABLED(CONFIG_ELOG))
+ return;
+
+ if (pm1_sts & PWRBTN_STS)
+ elog_add_event_wake(ELOG_WAKE_SOURCE_PWRBTN, 0);
+
+ if (pm1_sts & RTC_STS)
+ elog_add_event_wake(ELOG_WAKE_SOURCE_RTC, 0);
+
+ if (pm1_sts & PCIEXPWAK_STS)
+ elog_add_event_wake(ELOG_WAKE_SOURCE_PCIE, 0);
+}
+
+static void sb_clear_pm1_status(void)
+{
+ uint16_t pm1_sts = reset_pm1_status();
+ sb_log_pm1_status(pm1_sts);
+ print_pm1_status(pm1_sts);
+}
+
void southbridge_init(void *chip_info)
{
sb_init_acpi_ports();
+ sb_clear_pm1_status();
}
void southbridge_final(void *chip_info)