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/** @file
C language wrapper to build DSDT generated data.
Copyright (c) 2014 - 2016, AMD Inc. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include <AmdStyxAcpiLib.h>
#include <Library/BaseLib.h>
#include <Library/DebugLib.h>
#include <Library/PcdLib.h>
#include <Dsdt.hex>
#include <Dsdt.offset.h>
UINTN
ShiftLeftByteToUlong (
IN UINT8 Byte,
IN UINTN Shift
)
{
UINTN Data;
Data = (UINTN)Byte;
Data <<= Shift;
return Data;
}
UINTN
AmlGetPkgLength (
IN UINT8 *Buffer,
OUT UINTN *PkgLength
)
{
UINTN Bytes, Length;
Bytes = (UINTN)((Buffer[0] >> 6) & 0x3) + 1;
switch (Bytes) {
case 1:
Length = (UINTN)Buffer[0];
break;
case 2:
Length = ShiftLeftByteToUlong(Buffer[1], 4) +
(UINTN)(Buffer[0] & 0x0F);
break;
case 3:
Length = ShiftLeftByteToUlong(Buffer[2], 12) +
ShiftLeftByteToUlong(Buffer[1], 4) +
(UINTN)(Buffer[0] & 0x0F);
break;
default: /* 4 bytes */
Length = ShiftLeftByteToUlong(Buffer[3], 20) +
ShiftLeftByteToUlong(Buffer[2], 12) +
ShiftLeftByteToUlong(Buffer[1], 4) +
(UINTN)(Buffer[0] & 0x0F);
break;
}
*PkgLength = Length;
return Bytes;
}
UINT8 *
AmlSearchStringPackage (
IN UINT8 *Buffer,
IN UINTN Length,
IN CHAR8 *String
)
{
UINTN StrLength;
StrLength = AsciiStrLen (String) + 1;
if (Length > StrLength ) {
Length -= StrLength;
while (AsciiStrCmp((CHAR8 *)Buffer, String) != 0 && Length) {
--Length;
++Buffer;
}
if (Length) {
return &Buffer[StrLength];
}
}
return NULL;
}
VOID
OverrideMacAddr (
IN UINT8 *DSD_Data,
IN UINT64 MacAddr
)
{
UINT8 *MacAddrPkg;
UINTN Bytes, Length, Index = 0;
// AML encoding: PackageOp
if (DSD_Data[0] == 0x12) {
// AML encoding: PkgLength
Bytes = AmlGetPkgLength (&DSD_Data[1], &Length);
// Search for "mac-address" property
MacAddrPkg = AmlSearchStringPackage (&DSD_Data[Bytes + 1],
Length - Bytes,
"mac-address");
if (MacAddrPkg &&
MacAddrPkg[0] == 0x12 && // PackageOp
MacAddrPkg[1] == 0x0E && // PkgLength
MacAddrPkg[2] == 0x06) { // NumElements (element must have a BytePrefix)
MacAddrPkg += 3;
do {
MacAddrPkg[0] = 0x0A; // BytePrefix
MacAddrPkg[1] = (UINT8)(MacAddr & 0xFF);
MacAddrPkg += 2;
MacAddr >>= 8;
} while (++Index < 6);
}
}
}
VOID
OverrideStatus (
IN UINT8 *DSD_Data,
IN BOOLEAN Enable
)
{
if (Enable) {
// AML encoding: ReturnOp + BytePrefix
if (DSD_Data[1] == 0xA4 && DSD_Data[2] == 0x0A) {
DSD_Data[3] = 0x0F;
}
} else {
// AML encoding: ReturnOp
if (DSD_Data[1] == 0xA4) {
// AML encoding: BytePrefix?
if (DSD_Data[2] == 0x0A) {
DSD_Data[3] = 0x00;
} else {
DSD_Data[2] = 0x00;
}
}
}
}
EFI_ACPI_DESCRIPTION_HEADER *
DsdtHeader (
VOID
)
{
AML_OFFSET_TABLE_ENTRY *Table;
BOOLEAN EnableOnB1;
UINT32 CpuId = PcdGet32 (PcdSocCpuId);
// Enable features on Styx-B1 or later
EnableOnB1 = (CpuId & 0xFF0) && (CpuId & 0x00F);
Table = &DSDT_SEATTLE__OffsetTable[0];
while (Table->Pathname) {
if (AsciiStrCmp(Table->Pathname, "_SB_.ETH0._DSD") == 0) {
OverrideMacAddr ((UINT8 *)&AmlCode[Table->Offset], PcdGet64 (PcdEthMacA));
}
else if (AsciiStrCmp(Table->Pathname, "_SB_.ETH1._DSD") == 0) {
OverrideMacAddr ((UINT8 *)&AmlCode[Table->Offset], PcdGet64 (PcdEthMacB));
}
else if (AsciiStrCmp(Table->Pathname, "_SB_.AHC1._STA") == 0) {
OverrideStatus ((UINT8 *)&AmlCode[Table->Offset],
EnableOnB1 && FixedPcdGet8(PcdSata1PortCount) > 0);
}
else if (AsciiStrCmp(Table->Pathname, "_SB_.GIO2._STA") == 0) {
OverrideStatus ((UINT8 *)&AmlCode[Table->Offset], EnableOnB1);
}
else if (AsciiStrCmp(Table->Pathname, "_SB_.GIO3._STA") == 0) {
OverrideStatus ((UINT8 *)&AmlCode[Table->Offset], EnableOnB1);
}
++Table;
}
return (EFI_ACPI_DESCRIPTION_HEADER *) &AmlCode[0];
}
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