2 CPU exception handler library implemenation for SEC/PEIM modules.
4 Copyright (c) 2012 - 2013, Intel Corporation. All rights reserved.<BR>
5 This program and the accompanying materials are licensed and made available under
6 the terms and conditions of the BSD License that accompanies this distribution.
7 The full text of the license may be found at
8 http://opensource.org/licenses/bsd-license.php.
10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
16 #include "CpuExceptionCommon.h"
19 // Image Aglinment size for SEC/PEI phase
21 CONST UINTN mImageAlignSize
= 4;
22 CONST UINTN mDoFarReturnFlag
= 0;
25 Common exception handler.
27 @param ExceptionType Exception type.
28 @param SystemContext Pointer to EFI_SYSTEM_CONTEXT.
32 CommonExceptionHandler (
33 IN EFI_EXCEPTION_TYPE ExceptionType
,
34 IN EFI_SYSTEM_CONTEXT SystemContext
38 // Display ExceptionType, CPU information and Image information
40 DumpCpuContent (ExceptionType
, SystemContext
);
49 Initializes all CPU exceptions entries and provides the default exception handlers.
51 Caller should try to get an array of interrupt and/or exception vectors that are in use and need to
52 persist by EFI_VECTOR_HANDOFF_INFO defined in PI 1.3 specification.
53 If caller cannot get reserved vector list or it does not exists, set VectorInfo to NULL.
54 If VectorInfo is not NULL, the exception vectors will be initialized per vector attribute accordingly.
55 Note: Before invoking this API, caller must allocate memory for IDT table and load
56 IDTR by AsmWriteIdtr().
58 @param[in] VectorInfo Pointer to reserved vector list.
60 @retval EFI_SUCCESS CPU Exception Entries have been successfully initialized
61 with default exception handlers.
62 @retval EFI_INVALID_PARAMETER VectorInfo includes the invalid content if VectorInfo is not NULL.
63 @retval EFI_UNSUPPORTED This function is not supported.
68 InitializeCpuExceptionHandlers (
69 IN EFI_VECTOR_HANDOFF_INFO
*VectorInfo OPTIONAL
73 RESERVED_VECTORS_DATA ReservedVectorData
[CPU_EXCEPTION_NUM
];
74 IA32_DESCRIPTOR IdtDescriptor
;
77 EXCEPTION_HANDLER_TEMPLATE_MAP TemplateMap
;
78 IA32_IDT_GATE_DESCRIPTOR
*IdtTable
;
80 UINTN InterruptHandler
;
82 if (VectorInfo
!= NULL
) {
83 SetMem ((VOID
*) ReservedVectorData
, sizeof (RESERVED_VECTORS_DATA
) * CPU_EXCEPTION_NUM
, 0xff);
84 Status
= ReadAndVerifyVectorInfo (VectorInfo
, ReservedVectorData
, CPU_EXCEPTION_NUM
);
85 if (EFI_ERROR (Status
)) {
86 return EFI_INVALID_PARAMETER
;
90 // Read IDT descriptor and calculate IDT size
92 AsmReadIdtr (&IdtDescriptor
);
93 IdtEntryCount
= (IdtDescriptor
.Limit
+ 1) / sizeof (IA32_IDT_GATE_DESCRIPTOR
);
94 if (IdtEntryCount
> CPU_EXCEPTION_NUM
) {
96 // CPU exeption library only setup CPU_EXCEPTION_NUM exception handler at most
98 IdtEntryCount
= CPU_EXCEPTION_NUM
;
101 // Use current CS as the segment selector of interrupt gate in IDT
103 CodeSegment
= AsmReadCs ();
105 AsmGetTemplateAddressMap (&TemplateMap
);
106 IdtTable
= (IA32_IDT_GATE_DESCRIPTOR
*)IdtDescriptor
.Base
;
107 for (Index
= 0; Index
< IdtEntryCount
; Index
++) {
108 IdtTable
[Index
].Bits
.Selector
= CodeSegment
;
110 // Check reserved vectors attributes if has, only EFI_VECTOR_HANDOFF_DO_NOT_HOOK
111 // supported in this instance
113 if (VectorInfo
!= NULL
) {
114 if (ReservedVectorData
[Index
].Attribute
== EFI_VECTOR_HANDOFF_DO_NOT_HOOK
) {
121 InterruptHandler
= TemplateMap
.ExceptionStart
+ Index
* TemplateMap
.ExceptionStubHeaderSize
;
122 ArchUpdateIdtEntry (&IdtTable
[Index
], InterruptHandler
);
128 Initializes all CPU interrupt/exceptions entries and provides the default interrupt/exception handlers.
130 Caller should try to get an array of interrupt and/or exception vectors that are in use and need to
131 persist by EFI_VECTOR_HANDOFF_INFO defined in PI 1.3 specification.
132 If caller cannot get reserved vector list or it does not exists, set VectorInfo to NULL.
133 If VectorInfo is not NULL, the exception vectors will be initialized per vector attribute accordingly.
135 @param[in] VectorInfo Pointer to reserved vector list.
137 @retval EFI_SUCCESS All CPU interrupt/exception entries have been successfully initialized
138 with default interrupt/exception handlers.
139 @retval EFI_INVALID_PARAMETER VectorInfo includes the invalid content if VectorInfo is not NULL.
140 @retval EFI_UNSUPPORTED This function is not supported.
145 InitializeCpuInterruptHandlers (
146 IN EFI_VECTOR_HANDOFF_INFO
*VectorInfo OPTIONAL
149 return EFI_UNSUPPORTED
;
153 Registers a function to be called from the processor interrupt handler.
155 This function registers and enables the handler specified by InterruptHandler for a processor
156 interrupt or exception type specified by InterruptType. If InterruptHandler is NULL, then the
157 handler for the processor interrupt or exception type specified by InterruptType is uninstalled.
158 The installed handler is called once for each processor interrupt or exception.
159 NOTE: This function should be invoked after InitializeCpuExceptionHandlers() or
160 InitializeCpuInterruptHandlers() invoked, otherwise EFI_UNSUPPORTED returned.
162 @param[in] InterruptType Defines which interrupt or exception to hook.
163 @param[in] InterruptHandler A pointer to a function of type EFI_CPU_INTERRUPT_HANDLER that is called
164 when a processor interrupt occurs. If this parameter is NULL, then the handler
167 @retval EFI_SUCCESS The handler for the processor interrupt was successfully installed or uninstalled.
168 @retval EFI_ALREADY_STARTED InterruptHandler is not NULL, and a handler for InterruptType was
169 previously installed.
170 @retval EFI_INVALID_PARAMETER InterruptHandler is NULL, and a handler for InterruptType was not
171 previously installed.
172 @retval EFI_UNSUPPORTED The interrupt specified by InterruptType is not supported,
173 or this function is not supported.
177 RegisterCpuInterruptHandler (
178 IN EFI_EXCEPTION_TYPE InterruptType
,
179 IN EFI_CPU_INTERRUPT_HANDLER InterruptHandler
182 return EFI_UNSUPPORTED
;