1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
|
/** @file
Sample to provide SaveSecContext function.
Copyright (c) 2014, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <PiPei.h>
#include <Library/DebugLib.h>
#include <Ppi/TopOfTemporaryRam.h>
#include <Ppi/SecPlatformInformation.h>
/**
Save BIST value before call FspInit.
@param[in] Bist BIST value.
**/
VOID
AsmSaveBistValue (
IN UINT32 Bist
);
/**
Save Ticker value before call FspInit.
@param[in] Ticker Ticker value.
**/
VOID
AsmSaveTickerValue (
IN UINT64 Ticker
);
/**
Save SEC context before call FspInit.
@param[in] PeiServices Pointer to PEI Services Table.
**/
VOID
EFIAPI
SaveSecContext (
IN CONST EFI_PEI_SERVICES **PeiServices
)
{
UINT32 *Bist;
UINT64 *Ticker;
UINT32 Size;
UINT32 Count;
UINT32 TopOfTemporaryRam;
VOID *TopOfTemporaryRamPpi;
EFI_STATUS Status;
DEBUG ((DEBUG_INFO, "SaveSecContext - 0x%x\n", PeiServices));
Status = (*PeiServices)->LocatePpi (
PeiServices,
&gTopOfTemporaryRamPpiGuid,
0,
NULL,
(VOID **) &TopOfTemporaryRamPpi
);
if (EFI_ERROR (Status)) {
return ;
}
DEBUG ((DEBUG_INFO, "TopOfTemporaryRamPpi - 0x%x\n", TopOfTemporaryRamPpi));
//
// The entries of BIST information, together with the number of them,
// reside in the bottom of stack, left untouched by normal stack operation.
// This routine copies the BIST information to the buffer pointed by
// PlatformInformationRecord for output.
//
// |--------------| <- TopOfTemporaryRam
// |Number of BSPs|
// |--------------|
// | BIST |
// |--------------|
// | .... |
// |--------------|
// | TSC[63:32] |
// |--------------|
// | TSC[31:00] |
// |--------------|
//
TopOfTemporaryRam = (UINT32)(UINTN)TopOfTemporaryRamPpi - sizeof(UINT32);
TopOfTemporaryRam -= sizeof(UINT32) * 2;
DEBUG ((DEBUG_INFO, "TopOfTemporaryRam - 0x%x\n", TopOfTemporaryRam));
Count = *(UINT32 *)(UINTN)(TopOfTemporaryRam - sizeof(UINT32));
DEBUG ((DEBUG_INFO, "Count - 0x%x\n", Count));
Size = Count * sizeof (IA32_HANDOFF_STATUS);
DEBUG ((DEBUG_INFO, "Size - 0x%x\n", Size));
Bist = (UINT32 *)(UINTN)(TopOfTemporaryRam - sizeof(UINT32) - Size);
DEBUG ((DEBUG_INFO, "Bist - 0x%x\n", *Bist));
Ticker = (UINT64 *)(UINTN)(TopOfTemporaryRam - sizeof(UINT32) - Size - sizeof(UINT64));
DEBUG ((DEBUG_INFO, "Ticker - 0x%lx\n", *Ticker));
// Just need record BSP
AsmSaveBistValue (*Bist);
AsmSaveTickerValue (*Ticker);
}
|
