sch: Switch to per-device ACPI

Change-Id: I4cf0a67b0251d2d3adff5de74bf56b7d4c4524ee
Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com>
Reviewed-on: http://review.coreboot.org/6811
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>

src/southbridge/intel/sch/acpi/globalnvs.asl

@@ -30,8 +30,8 @@ Name(\DSEN, 1)		// Display Output Switching Enable
  * we have to fix it up in coreboot's ACPI creation phase.
  */
 
-
-OperationRegion (GNVS, SystemMemory, 0xC0DEBABE, 0x100)
+External(NVSA)
+OperationRegion (GNVS, SystemMemory, NVSA, 0x100)
 Field (GNVS, ByteAcc, NoLock, Preserve)
 {
 	/* Miscellaneous */

src/southbridge/intel/sch/lpc.c

@@ -24,6 +24,12 @@
 #include <device/pci_ids.h>
 #include <arch/io.h>
 #include <arch/ioapic.h>
+#include <arch/acpigen.h>
+#include <arch/acpigen.h>
+#include <cpu/cpu.h>
+#include <cbmem.h>
+#include <string.h>
+#include "nvs.h"
 #include "chip.h"
 
 /* SCH LPC defines */
@@ -182,6 +188,24 @@ static void set_subsystem(device_t dev, unsigned vendor, unsigned device)
 	}
 }
 
+static void southbridge_inject_dsdt(void)
+{
+	global_nvs_t *gnvs = cbmem_add (CBMEM_ID_ACPI_GNVS, sizeof (*gnvs));
+
+	if (gnvs) {
+		int scopelen;
+		memset(gnvs, 0, sizeof(*gnvs));
+		acpi_create_gnvs(gnvs);
+		/* And tell SMI about it */
+		smm_setup_structures(gnvs, NULL, NULL);
+
+		/* Add it to SSDT.  */
+		scopelen = acpigen_write_scope("\\");
+		scopelen += acpigen_write_name_dword("NVSA", (u32) gnvs);
+		acpigen_patch_len(scopelen - 1);
+	}
+}
+
 static struct pci_operations pci_ops = {
 	.set_subsystem = set_subsystem,
 };
@@ -190,6 +214,8 @@ static struct device_operations device_ops = {
 	.read_resources		= sch_lpc_read_resources,
 	.set_resources		= pci_dev_set_resources,
 	.enable_resources	= pci_dev_enable_resources,
+	.acpi_inject_dsdt_generator = southbridge_inject_dsdt,
+	.write_acpi_tables      = acpi_write_hpet,
 	.init			= lpc_init,
 	.scan_bus		= scan_static_bus,
 	.ops_pci		= &pci_ops,

src/southbridge/intel/sch/nvs.h

@@ -135,3 +135,5 @@ typedef struct {
 	u8	bten;
 	u8	rsvd13[14];
 } __attribute__((packed)) global_nvs_t;
+
+void acpi_create_gnvs(global_nvs_t * gnvs);