broadwell: Fixes for _SWS support

- These should be 64bit values so when they try to return -1
it is interpreted properly by the kernel.
- The GPE value needs to be reset at the start so it does not
return stale data from a previous resume.
- If a GPE register is zero the value should only be updated
if it has not yet found a set bit.

BUG=chrome-os-partner:34532
BRANCH=samus,auron
TEST=build and boot on samus, suspend/resume with various
wake sources and ensure the reported _SWS values are correct
in every case.

Original-Change-Id: Ic6897f20ad2f321f3566694c032b75a3db120556
Original-Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/235012
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
(cherry picked from commit be3c79b87b81563f744eb885708a52730debaccb)
Signed-off-by: Marc Jones <marc.jones@se-eng.com>

Change-Id: I801c6e4f90dde0f5f69685f987a9831ee5e99e4a
Reviewed-on: http://review.coreboot.org/9699
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

3 files changed, 23 insertions, 23 deletions

diff --git a/src/soc/intel/broadwell/acpi/globalnvs.asl b/src/soc/intel/broadwell/acpi/globalnvs.asl
index 9bddbc212c..223d21a676 100644
--- a/src/soc/intel/broadwell/acpi/globalnvs.asl
+++ b/src/soc/intel/broadwell/acpi/globalnvs.asl
@@ -53,16 +53,15 @@ Field (GNVS, ByteAcc, NoLock, Preserve)
 	TCRT,	8,	// 0x10 - Critical Threshold
 	TPSV,	8,	// 0x11 - Passive Threshold
 	TMAX,	8,	// 0x12 - CPU Tj_max
-	,	8,	// 0x13 - Unused
-	S5U0,	8,	// 0x14 - Enable USB in S5
-	S3U0,	8,	// 0x15 - Enable USB in S3
-	S33G,	8,	// 0x16 - Enable 3G in S3
-	LIDS,	8,	// 0x17 - LID State
-	PWRS,	8,	// 0x18 - AC Power State
-	CMEM,	32,	// 0x19 - 0x1c - CBMEM TOC
-	CBMC,	32,	// 0x1d - 0x20 - Coreboot Memory Console
-	PM1I,	32,	// 0x21 - 0x24 - PM1 wake status bit
-	GPEI,	32,	// 0x25 - 0x28 - GPE wake status bit
+	S5U0,	8,	// 0x13 - Enable USB in S5
+	S3U0,	8,	// 0x14 - Enable USB in S3
+	S33G,	8,	// 0x15 - Enable 3G in S3
+	LIDS,	8,	// 0x16 - LID State
+	PWRS,	8,	// 0x17 - AC Power State
+	CMEM,	32,	// 0x18 - 0x1b - CBMEM TOC
+	CBMC,	32,	// 0x1c - 0x1f - Coreboot Memory Console
+	PM1I,	64,	// 0x20 - 0x27 - PM1 wake status bit
+	GPEI,	64,	// 0x28 - 0x2f - GPE wake status bit
 
 	/* ChromeOS specific */
 	Offset (0x100),
diff --git a/src/soc/intel/broadwell/include/soc/nvs.h b/src/soc/intel/broadwell/include/soc/nvs.h
index 2f835c88ac..0f1e63a67a 100644
--- a/src/soc/intel/broadwell/include/soc/nvs.h
+++ b/src/soc/intel/broadwell/include/soc/nvs.h
@@ -44,17 +44,16 @@ typedef struct {
 	u8	tcrt; /* 0x10 - Critical Threshold */
 	u8	tpsv; /* 0x11 - Passive Threshold */
 	u8	tmax; /* 0x12 - CPU Tj_max */
-	u8	unused1; /* 0x13 - Unused */
-	u8	s5u0; /* 0x14 - Enable USB in S5 */
-	u8	s3u0; /* 0x15 - Enable USB in S3 */
-	u8	s33g; /* 0x16 - Enable 3G in S3 */
-	u8	lids; /* 0x17 - LID State */
-	u8	pwrs; /* 0x18 - AC Power State */
-	u32	obsolete_cmem; /* 0x19 - 0x1c - CBMEM TOC */
-	u32	cbmc; /* 0x1d - 0x20 - Coreboot Memory Console */
-	u32	pm1i; /* 0x21 - 0x24 - PM1 wake status bit */
-	u32	gpei; /* 0x25 - 0x28 - GPE wake status bit */
-	u8	unused[215];
+	u8	s5u0; /* 0x13 - Enable USB in S5 */
+	u8	s3u0; /* 0x14 - Enable USB in S3 */
+	u8	s33g; /* 0x15 - Enable 3G in S3 */
+	u8	lids; /* 0x16 - LID State */
+	u8	pwrs; /* 0x17 - AC Power State */
+	u32	cmem; /* 0x18 - 0x1b - CBMEM TOC */
+	u32	cbmc; /* 0x1c - 0x1f - Coreboot Memory Console */
+	u64	pm1i; /* 0x20 - 0x27 - PM1 wake status bit */
+	u64	gpei; /* 0x28 - 0x2f - GPE wake status bit */
+	u8	unused[208];
 
 	/* ChromeOS specific (0x100 - 0xfff) */
 	chromeos_acpi_t chromeos;
diff --git a/src/soc/intel/broadwell/ramstage.c b/src/soc/intel/broadwell/ramstage.c
index c9a422f8e4..eaa28d02f1 100644
--- a/src/soc/intel/broadwell/ramstage.c
+++ b/src/soc/intel/broadwell/ramstage.c
@@ -52,13 +52,15 @@ static void save_acpi_wake_source(global_nvs_t *gnvs)
 		gnvs->pm1i = -1;
 
 	/* Scan for first set bit in GPE registers */
+	gnvs->gpei = -1;
 	for (gpe_reg = 0; gpe_reg < GPE0_REG_MAX; gpe_reg++) {
 		u32 gpe = ps->gpe0_sts[gpe_reg] & ps->gpe0_en[gpe_reg];
 		int start = gpe_reg * GPE0_REG_SIZE;
 		int end = start + GPE0_REG_SIZE;
 
 		if (gpe == 0) {
-			gnvs->gpei = end;
+			if (!gnvs->gpei)
+				gnvs->gpei = end;
 			continue;
 		}
 
@@ -73,7 +75,7 @@ static void save_acpi_wake_source(global_nvs_t *gnvs)
 	if (gnvs->gpei >= (GPE0_REG_MAX * GPE0_REG_SIZE))
 		gnvs->gpei = -1;
 
-	printk(BIOS_DEBUG, "ACPI _SWS is PM1 Index %d GPE Index %d\n",
+	printk(BIOS_DEBUG, "ACPI _SWS is PM1 Index %lld GPE Index %lld\n",
 	       gnvs->pm1i, gnvs->gpei);
 }