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authorVladimir Serbinenko <phcoder@gmail.com>2014-09-05 16:29:41 +0200
committerVladimir Serbinenko <phcoder@gmail.com>2014-10-16 14:46:55 +0200
commit332f14b60b241d1793401ea50b22785ad81c97cd (patch)
tree3b92dfc8af555c75228fd620b887f3b4d72299a1 /src/southbridge
parentc845b43f0a404adaf96808a122c591c5552dc818 (diff)
downloadcoreboot-332f14b60b241d1793401ea50b22785ad81c97cd.tar.xz
bd82x6x: Move common bd82x6x S3 detect to bd82x6x code.
Change-Id: I9ba1fa5f9ad38cb619466c6199eacd219bc53281 Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com> Reviewed-on: http://review.coreboot.org/6921 Tested-by: build bot (Jenkins) Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Diffstat (limited to 'src/southbridge')
-rw-r--r--src/southbridge/intel/bd82x6x/early_pch.c31
-rw-r--r--src/southbridge/intel/bd82x6x/pch.h1
2 files changed, 32 insertions, 0 deletions
diff --git a/src/southbridge/intel/bd82x6x/early_pch.c b/src/southbridge/intel/bd82x6x/early_pch.c
index 9f80d41aa4..3438a0ad53 100644
--- a/src/southbridge/intel/bd82x6x/early_pch.c
+++ b/src/southbridge/intel/bd82x6x/early_pch.c
@@ -20,6 +20,9 @@
#include <arch/io.h>
#include <timestamp.h>
+#include "pch.h"
+#include <arch/acpi.h>
+#include <console/console.h>
#if CONFIG_COLLECT_TIMESTAMPS
tsc_t get_initial_timestamp(void)
@@ -31,3 +34,31 @@ tsc_t get_initial_timestamp(void)
return base_time;
}
#endif
+
+
+int southbridge_detect_s3_resume(void)
+{
+ u32 pm1_cnt;
+ u16 pm1_sts;
+
+ /* Check PM1_STS[15] to see if we are waking from Sx */
+ pm1_sts = inw(DEFAULT_PMBASE + PM1_STS);
+
+ /* Read PM1_CNT[12:10] to determine which Sx state */
+ pm1_cnt = inl(DEFAULT_PMBASE + PM1_CNT);
+
+ if ((pm1_sts & WAK_STS) && ((pm1_cnt >> 10) & 7) == 5) {
+ if (acpi_s3_resume_allowed()) {
+ printk(BIOS_DEBUG, "Resume from S3 detected.\n");
+ /* Clear SLP_TYPE. This will break stage2 but
+ * we care for that when we get there.
+ */
+ outl(pm1_cnt & ~(7 << 10), DEFAULT_PMBASE + PM1_CNT);
+ return 1;
+ } else {
+ printk(BIOS_DEBUG, "Resume from S3 detected, but disabled.\n");
+ }
+ }
+
+ return 0;
+}
diff --git a/src/southbridge/intel/bd82x6x/pch.h b/src/southbridge/intel/bd82x6x/pch.h
index 83128e2540..aabf617d3a 100644
--- a/src/southbridge/intel/bd82x6x/pch.h
+++ b/src/southbridge/intel/bd82x6x/pch.h
@@ -76,6 +76,7 @@ int smbus_read_byte(unsigned device, unsigned address);
int early_spi_read(u32 offset, u32 size, u8 *buffer);
void early_thermal_init(void);
void early_pch_init_native(void);
+int southbridge_detect_s3_resume(void);
#endif
#endif