diff options
Diffstat (limited to 'src/vendorcode/amd/cimx/sb800/ACPILIB.c')
| -rw-r--r-- | src/vendorcode/amd/cimx/sb800/ACPILIB.c | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/src/vendorcode/amd/cimx/sb800/ACPILIB.c b/src/vendorcode/amd/cimx/sb800/ACPILIB.c new file mode 100644 index 0000000000..3771673257 --- /dev/null +++ b/src/vendorcode/amd/cimx/sb800/ACPILIB.c @@ -0,0 +1,158 @@ +/*
+ *****************************************************************************
+ *
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2010 Advanced Micro Devices, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ * ***************************************************************************
+ *
+ */
+
+#include "SBPLATFORM.h"
+
+//
+//
+// Routine Description:
+//
+// Locate ACPI table
+//
+// Arguments:
+//
+// Signature - table signature
+//
+//Returns:
+//
+// pointer to ACPI table
+//
+//
+VOID*
+ACPI_LocateTable (
+ IN UINT32 Signature
+ )
+{
+ UINT32 i;
+ UINT32* RsdPtr;
+ UINT32* Rsdt;
+ UINTN tableOffset;
+ DESCRIPTION_HEADER* CurrentTable;
+
+ RsdPtr = (UINT32*) (UINTN)0xe0000;
+ Rsdt = NULL;
+ do {
+ //if ( *RsdPtr == ' DSR' && *(RsdPtr + 1) == ' RTP' ) { //gcc multi-character character constant warning
+ if ( *RsdPtr == 0x20445352 && *(RsdPtr + 1) == 0x20525450) {
+
+ Rsdt = (UINT32*) (UINTN) ((RSDP*)RsdPtr)->RsdtAddress;
+ break;
+ }
+ RsdPtr += 4;
+ } while ( RsdPtr <= (UINT32*) (UINTN)0xffff0 );
+ if ( Rsdt != NULL && ACPI_GetTableChecksum (Rsdt) == 0 ) {
+ for ( i = 0; i < (((DESCRIPTION_HEADER*)Rsdt)->Length - sizeof (DESCRIPTION_HEADER)) / 4; i++ ) {
+ tableOffset = *(UINTN*) ((UINT8*)Rsdt + sizeof (DESCRIPTION_HEADER) + i * 4);
+ CurrentTable = (DESCRIPTION_HEADER*)tableOffset;
+ if ( CurrentTable->Signature == Signature ) {
+ return CurrentTable;
+ }
+ }
+ }
+ return NULL;
+}
+
+//
+//
+// Routine Description:
+//
+// Update table checksum
+//
+// Arguments:
+//
+// TablePtr - table pointer
+//
+// Returns:
+//
+// none
+//
+//
+VOID
+ACPI_SetTableChecksum (
+ IN VOID* TablePtr
+ )
+{
+ UINT8 Checksum;
+ Checksum = 0;
+ ((DESCRIPTION_HEADER*)TablePtr)->Checksum = 0;
+ Checksum = ACPI_GetTableChecksum (TablePtr);
+ ((DESCRIPTION_HEADER*)TablePtr)->Checksum = (UINT8)(0x100 - Checksum);
+}
+
+//
+//
+// Routine Description:
+//
+// Get table checksum
+//
+// Arguments:
+//
+// TablePtr - table pointer
+//
+// Returns:
+//
+// none
+//
+//
+UINT8
+ACPI_GetTableChecksum (
+ IN VOID* TablePtr
+ )
+{
+ return GetByteSum (TablePtr, ((DESCRIPTION_HEADER*)TablePtr)->Length);
+}
+
+
+UINT8
+GetByteSum (
+ IN VOID* pData,
+ IN UINT32 Length
+ )
+{
+ UINT32 i;
+ UINT8 Checksum;
+ Checksum = 0;
+ for ( i = 0; i < Length; i++ ) {
+ Checksum = Checksum + (*((UINT8*)pData + i));
+ }
+ return Checksum;
+}
+VOID
+GetSbAcpiMmioBase (
+ OUT UINT32* AcpiMmioBase
+ )
+{
+ UINT32 Value16;
+
+ ReadPMIO (SB_PMIOA_REG24 + 2, AccWidthUint16, &Value16);
+ *AcpiMmioBase = Value16 << 16;
+}
+
+VOID
+GetSbAcpiPmBase (
+ OUT UINT16* AcpiPmBase
+ )
+{
+ ReadPMIO (SB_PMIOA_REG60, AccWidthUint16, AcpiPmBase);
+}
+
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