1 /** @file
2
3 Copyright (c) 2004 - 2014, Intel Corporation. All rights reserved.<BR>
4
5
6 This program and the accompanying materials are licensed and made available under
7
8 the terms and conditions of the BSD License that accompanies this distribution.
9
10 The full text of the license may be found at
11
12 http://opensource.org/licenses/bsd-license.php.
13
14
15
16 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
17
18 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
19
20
21
22
23 Module Name:
24
25
26 ExI.c
27
28 Abstract:
29
30 ExI configuration based on setup option
31
32
33 --*/
34
35
36 #include "PlatformDxe.h"
37
38 #define PchLpcPciCfg32(Register) MmioRead32 (MmPciAddress (0, DEFAULT_PCI_BUS_NUMBER_PCH, PCI_DEVICE_NUMBER_PCH_LPC, 0, Register))
39
40 //
41 // Procedure: GetPmcBase
GetPmcBase(VOID)42 //
43 // Description: This function read content of B:D:F 0:31:0, offset 44h (for
44 // PmcBase)
45 //
46 // Input: None
47 //
48 // Output: 32 bit PmcBase
49 //
50 UINT32
51 GetPmcBase (
52 VOID
53 )
54 {
55 return (PchLpcPciCfg32 (R_PCH_LPC_PMC_BASE) & B_PCH_LPC_PMC_BASE_BAR);
56 }
57
InitExI()58 /**
59 Configure ExI.
60
61 @param ImageHandle Pointer to the loaded image protocol for this driver
62 @param SystemTable Pointer to the EFI System Table
63
64 @retval EFI_SUCCESS The driver initializes correctly.
65 **/
66 VOID
67 InitExI (
68 )
69 {
70 EFI_STATUS Status;
71
72 SYSTEM_CONFIGURATION SystemConfiguration;
73 UINTN VarSize;
74
75 VarSize = sizeof(SYSTEM_CONFIGURATION);
76
77 Status = gRT->GetVariable(
78 L"Setup",
79 &gEfiNormalSetupGuid,
80 NULL,
81 &VarSize,
82 &SystemConfiguration
83 );
84
85 if (EFI_ERROR (Status) || VarSize != sizeof(SYSTEM_CONFIGURATION)) {
86 //The setup variable is corrupted
87 VarSize = sizeof(SYSTEM_CONFIGURATION);
88 Status = gRT->GetVariable(
89 L"SetupRecovery",
90 &gEfiNormalSetupGuid,
91 NULL,
92 &VarSize,
93 &SystemConfiguration
94 );
95 ASSERT_EFI_ERROR (Status);
96 }
97
98 if (SystemConfiguration.ExISupport == 1) {
99 MmioOr32 ((UINTN) (GetPmcBase() + R_PCH_PMC_MTPMC1), (UINT32) BIT0+BIT1+BIT2);
100 } else if (SystemConfiguration.ExISupport == 0) {
101 MmioAnd32 ((UINTN) (GetPmcBase() + R_PCH_PMC_MTPMC1), ~((UINT32) BIT0+BIT1+BIT2)); //clear bit 0,1,2
102 }
103 }
104