Change in coreboot[master]: nb/intel/sandybridge/gma: Set up OpRegion in nb code

[Martin Roth (Code Review)]

Martin Roth has submitted this change and it was merged. ( https://review.coreboot.org/19310 )

Change subject: nb/intel/sandybridge/gma: Set up OpRegion in nb code
......................................................................

nb/intel/sandybridge/gma: Set up OpRegion in nb code

Set up IGD OpRegion in northbridge and fill in GNVS' aslb.
At this point GNVS already has been set up by SSDT injection.

Required for future VBT patches that will:
* Use ACPI memory instead of CBMEM
* Use common implementation to locate VBT
* Fill in platform specific values

Change-Id: I97c3402ac055991350732e55b0dda042b426c080
Signed-off-by: Patrick Rudolph 
Reviewed-on: https://review.coreboot.org/19310
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin 
---
M src/northbridge/intel/sandybridge/gma.c
M src/southbridge/intel/bd82x6x/lpc.c
2 files changed, 27 insertions(+), 6 deletions(-)

Approvals:
  Aaron Durbin: Looks good to me, approved
  build bot (Jenkins): Verified

diff --git a/src/northbridge/intel/sandybridge/gma.c b/src/northbridge/intel/sandybridge/gma.c
index dcc992c..868a961 100644
--- a/src/northbridge/intel/sandybridge/gma.c
+++ b/src/northbridge/intel/sandybridge/gma.c
@@ -24,6 +24,8 @@
 #include <device/pci_ops.h>
 #include <cpu/x86/msr.h>
 #include <cpu/x86/mtrr.h>
+#include <southbridge/intel/bd82x6x/nvs.h>
+#include <cbmem.h>

#include "chip.h"
 #include "sandybridge.h"
@@ -649,6 +651,30 @@
    drivers_intel_gma_displays_ssdt_generate(gfx);
 }

+static unsigned long
+gma_write_acpi_tables(struct device *const dev,
+		      unsigned long current,
+		      struct acpi_rsdp *const rsdp)
+{
+	igd_opregion_t *opregion;
+	global_nvs_t *gnvs;
+
+	// FIXME: Replace by common VBT implementation writing to current
+	opregion = igd_make_opregion();
+	if (opregion) {
+		/* GNVS has been already set up */
+		gnvs = cbmem_find(CBMEM_ID_ACPI_GNVS);
+		if (gnvs) {
+			/* IGD OpRegion Base Address */
+			gnvs->aslb = (u32)(uintptr_t)opregion;
+		} else {
+			printk(BIOS_ERR, "Error: GNVS table not found.\n");
+		}
+	}
+
+	return current;
+}
+
 /* called by pci set_vga_bridge function */
 static void gma_func0_disable(struct device *dev)
 {
@@ -676,6 +702,7 @@
    .enable			= 0,
    .disable		= gma_func0_disable,
    .ops_pci		= &gma_pci_ops,
+	.write_acpi_tables	= gma_write_acpi_tables,
 };

static const unsigned short pci_device_ids[] = { 0x0102, 0x0106, 0x010a, 0x0112,
diff --git a/src/southbridge/intel/bd82x6x/lpc.c b/src/southbridge/intel/bd82x6x/lpc.c
index 623482e..c9fee89 100644
--- a/src/southbridge/intel/bd82x6x/lpc.c
+++ b/src/southbridge/intel/bd82x6x/lpc.c
@@ -654,10 +654,6 @@
 static void southbridge_inject_dsdt(device_t dev)
 {
    global_nvs_t *gnvs = cbmem_add (CBMEM_ID_ACPI_GNVS, sizeof(*gnvs));
-	void *opregion;
-
-	/* Calling northbridge code as gnvs contains opregion address.  */
-	opregion = igd_make_opregion();

if (gnvs) {
    	const struct i915_gpu_controller_info *gfx = intel_gma_get_controller_info();
@@ -676,8 +672,6 @@
    	chromeos_init_vboot(&(gnvs->chromeos));
 #endif

-		/* IGD OpRegion Base Address */
-		gnvs->aslb = (u32)opregion;
    	/* And tell SMI about it */
    	smm_setup_structures(gnvs, NULL, NULL);