drv/intel/gma/opregion: Add interface for GNVS ASLB handling

Add and use new interface to set and get GNVS' ASLB register.
To be used by Intel's gma driver to set ASLB at ACPI table
creation and to get ASLB on S3 resume.

Change-Id: If30c6b2270069783b0892774802f47406404da5f
Signed-off-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-on: https://review.coreboot.org/20435
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

4 files changed, 56 insertions, 4 deletions

diff --git a/src/northbridge/intel/fsp_sandybridge/gma.c b/src/northbridge/intel/fsp_sandybridge/gma.c
index 8e2d968cb3..224b674094 100644
--- a/src/northbridge/intel/fsp_sandybridge/gma.c
+++ b/src/northbridge/intel/fsp_sandybridge/gma.c
@@ -53,6 +53,19 @@ u32 map_oprom_vendev(u32 vendev)
 	return new_vendev;
 }
 
+uintptr_t gma_get_gnvs_aslb(const void *gnvs)
+{
+	const global_nvs_t *gnvs_ptr = gnvs;
+	return (uintptr_t)(gnvs_ptr ? gnvs_ptr->aslb : 0);
+}
+
+void gma_set_gnvs_aslb(void *gnvs, uintptr_t aslb)
+{
+	global_nvs_t *gnvs_ptr = gnvs;
+	if (gnvs_ptr)
+		gnvs_ptr->aslb = aslb;
+}
+
 static void gma_set_subsystem(device_t dev, unsigned vendor, unsigned device)
 {
 	if (!vendor || !device) {
@@ -121,7 +134,7 @@ gma_write_acpi_tables(struct device *const dev,
 	gnvs = cbmem_find(CBMEM_ID_ACPI_GNVS);
 	if (gnvs) {
 		/* IGD OpRegion Base Address */
-		gnvs->aslb = (u32)(uintptr_t)opregion;
+		gma_set_gnvs_aslb(gnvs, (uintptr_t)opregion);
 	} else {
 		printk(BIOS_ERR, "Error: GNVS table not found.\n");
 	}
diff --git a/src/northbridge/intel/haswell/gma.c b/src/northbridge/intel/haswell/gma.c
index 75f3b7a944..6cd1f6f1d7 100644
--- a/src/northbridge/intel/haswell/gma.c
+++ b/src/northbridge/intel/haswell/gma.c
@@ -215,6 +215,19 @@ int gtt_poll(u32 reg, u32 mask, u32 value)
 	return 0;
 }
 
+uintptr_t gma_get_gnvs_aslb(const void *gnvs)
+{
+	const global_nvs_t *gnvs_ptr = gnvs;
+	return (uintptr_t)(gnvs_ptr ? gnvs_ptr->aslb : 0);
+}
+
+void gma_set_gnvs_aslb(void *gnvs, uintptr_t aslb)
+{
+	global_nvs_t *gnvs_ptr = gnvs;
+	if (gnvs_ptr)
+		gnvs_ptr->aslb = aslb;
+}
+
 static void power_well_enable(void)
 {
 	gtt_write(HSW_PWR_WELL_CTL1, HSW_PWR_WELL_ENABLE);
@@ -527,7 +540,7 @@ gma_write_acpi_tables(struct device *const dev,
 	gnvs = cbmem_find(CBMEM_ID_ACPI_GNVS);
 	if (gnvs) {
 		/* IGD OpRegion Base Address */
-		gnvs->aslb = (u32)(uintptr_t)opregion;
+		gma_set_gnvs_aslb(gnvs, (uintptr_t)opregion);
 	} else {
 		printk(BIOS_ERR, "Error: GNVS table not found.\n");
 	}
diff --git a/src/northbridge/intel/nehalem/gma.c b/src/northbridge/intel/nehalem/gma.c
index fa84f784e4..7489fd4ed2 100644
--- a/src/northbridge/intel/nehalem/gma.c
+++ b/src/northbridge/intel/nehalem/gma.c
@@ -304,6 +304,19 @@ int gtt_poll(u32 reg, u32 mask, u32 value)
 	return 0;
 }
 
+uintptr_t gma_get_gnvs_aslb(const void *gnvs)
+{
+	const global_nvs_t *gnvs_ptr = gnvs;
+	return (uintptr_t)(gnvs_ptr ? gnvs_ptr->aslb : 0);
+}
+
+void gma_set_gnvs_aslb(void *gnvs, uintptr_t aslb)
+{
+	global_nvs_t *gnvs_ptr = gnvs;
+	if (gnvs_ptr)
+		gnvs_ptr->aslb = aslb;
+}
+
 static void gma_pm_init_pre_vbios(struct device *dev)
 {
 	u32 reg32;
@@ -1136,7 +1149,7 @@ gma_write_acpi_tables(struct device *const dev,
 	gnvs = cbmem_find(CBMEM_ID_ACPI_GNVS);
 	if (gnvs) {
 		/* IGD OpRegion Base Address */
-		gnvs->aslb = (u32)(uintptr_t)opregion;
+		gma_set_gnvs_aslb(gnvs, (uintptr_t)opregion);
 	} else {
 		printk(BIOS_ERR, "Error: GNVS table not found.\n");
 	}
diff --git a/src/northbridge/intel/sandybridge/gma.c b/src/northbridge/intel/sandybridge/gma.c
index 9611e64797..9de3895cab 100644
--- a/src/northbridge/intel/sandybridge/gma.c
+++ b/src/northbridge/intel/sandybridge/gma.c
@@ -311,6 +311,19 @@ int gtt_poll(u32 reg, u32 mask, u32 value)
 	return 0;
 }
 
+uintptr_t gma_get_gnvs_aslb(const void *gnvs)
+{
+	const global_nvs_t *gnvs_ptr = gnvs;
+	return (uintptr_t)(gnvs_ptr ? gnvs_ptr->aslb : 0);
+}
+
+void gma_set_gnvs_aslb(void *gnvs, uintptr_t aslb)
+{
+	global_nvs_t *gnvs_ptr = gnvs;
+	if (gnvs_ptr)
+		gnvs_ptr->aslb = aslb;
+}
+
 static void gma_pm_init_pre_vbios(struct device *dev)
 {
 	u32 reg32;
@@ -689,7 +702,7 @@ gma_write_acpi_tables(struct device *const dev,
 	gnvs = cbmem_find(CBMEM_ID_ACPI_GNVS);
 	if (gnvs) {
 		/* IGD OpRegion Base Address */
-		gnvs->aslb = (u32)(uintptr_t)opregion;
+		gma_set_gnvs_aslb(gnvs, (uintptr_t)opregion);
 	} else {
 		printk(BIOS_ERR, "Error: GNVS table not found.\n");
 	}