diff options
Diffstat (limited to 'Vlv2TbltDevicePkg/Library/PchPlatformLib/PchPlatformLibrary.c')
-rw-r--r-- | Vlv2TbltDevicePkg/Library/PchPlatformLib/PchPlatformLibrary.c | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/Vlv2TbltDevicePkg/Library/PchPlatformLib/PchPlatformLibrary.c b/Vlv2TbltDevicePkg/Library/PchPlatformLib/PchPlatformLibrary.c new file mode 100644 index 0000000000..c92308f4e9 --- /dev/null +++ b/Vlv2TbltDevicePkg/Library/PchPlatformLib/PchPlatformLibrary.c @@ -0,0 +1,131 @@ +/**
+
+Copyright (c) 2012 - 2014, Intel Corporation. All rights reserved
+
+ This program and the accompanying materials are licensed and made available under
+ the terms and conditions of the BSD License that 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.
+
+
+ @file
+ PchPlatformLib.c
+
+ @brief
+ PCH Platform Lib implementation.
+
+**/
+
+#include "PchPlatformLibrary.h"
+
+//
+// Silicon Steppings
+//
+/**
+ Return Pch stepping type
+
+ @param[in] None
+
+ @retval PCH_STEPPING Pch stepping type
+
+**/
+PCH_STEPPING
+EFIAPI
+PchStepping (
+ VOID
+ )
+{
+ UINT8 RevId;
+
+ RevId = MmioRead8 (
+ MmPciAddress (0,
+ DEFAULT_PCI_BUS_NUMBER_PCH,
+ PCI_DEVICE_NUMBER_PCH_LPC,
+ PCI_FUNCTION_NUMBER_PCH_LPC,
+ R_PCH_LPC_RID_CC)
+ );
+
+ switch (RevId) {
+ case V_PCH_LPC_RID_0:
+ case V_PCH_LPC_RID_1:
+ return PchA0;
+ break;
+
+ case V_PCH_LPC_RID_2:
+ case V_PCH_LPC_RID_3:
+ return PchA1;
+ break;
+
+ case V_PCH_LPC_RID_4:
+ case V_PCH_LPC_RID_5:
+ return PchB0;
+ break;
+
+ case V_PCH_LPC_RID_6:
+ case V_PCH_LPC_RID_7:
+ return PchB1;
+ break;
+
+ case V_PCH_LPC_RID_8:
+ case V_PCH_LPC_RID_9:
+ return PchB2;
+ break;
+
+ case V_PCH_LPC_RID_A:
+ case V_PCH_LPC_RID_B:
+ return PchB3;
+ break;
+
+ case V_PCH_LPC_RID_C:
+ case V_PCH_LPC_RID_D:
+ return PchC0;
+ break;
+
+ default:
+ return PchSteppingMax;
+ break;
+
+ }
+}
+
+/**
+ Determine if PCH is supported
+
+ @param[in] None
+
+ @retval TRUE PCH is supported
+ @retval FALSE PCH is not supported
+
+**/
+BOOLEAN
+IsPchSupported (
+ VOID
+ )
+{
+ UINT32 Identifiers;
+ UINT16 PcuVendorId;
+ UINT16 PcuDeviceId;
+
+ Identifiers = MmioRead32 (
+ MmPciAddress (0,
+ DEFAULT_PCI_BUS_NUMBER_PCH,
+ PCI_DEVICE_NUMBER_PCH_LPC,
+ PCI_FUNCTION_NUMBER_PCH_LPC,
+ R_PCH_LPC_REG_ID)
+ );
+
+ PcuDeviceId = (UINT16) ((Identifiers & B_PCH_LPC_DEVICE_ID) >> 16);
+ PcuVendorId = (UINT16) (Identifiers & B_PCH_LPC_VENDOR_ID);
+
+ //
+ // Verify that this is a supported chipset
+ //
+ if (PcuVendorId != (UINT16) V_PCH_LPC_VENDOR_ID || !IS_PCH_VLV_LPC_DEVICE_ID (PcuDeviceId)) {
+ DEBUG ((EFI_D_ERROR, "VLV SC code doesn't support the PcuDeviceId: 0x%04x!\n", PcuDeviceId));
+ return FALSE;
+ }
+ return TRUE;
+}
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