/** @file\r
- SEC Core Debug Agent Library instance implementition.\r
+ SEC Core Debug Agent Library instance implementation.\r
\r
- Copyright (c) 2010 - 2013, Intel Corporation. All rights reserved.<BR>\r
- This program and the accompanying materials\r
- are licensed and made available under the terms and conditions of the BSD License\r
- which accompanies this distribution. The full text of the license may be found at\r
- http://opensource.org/licenses/bsd-license.php.\r
-\r
- THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
- WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
+ Copyright (c) 2010 - 2017, Intel Corporation. All rights reserved.<BR>\r
+ SPDX-License-Identifier: BSD-2-Clause-Patent\r
\r
**/\r
\r
#include "SecPeiDebugAgentLib.h"\r
\r
-BOOLEAN mSkipBreakpoint = FALSE;\r
+GLOBAL_REMOVE_IF_UNREFERENCED BOOLEAN mSkipBreakpoint = FALSE;\r
+\r
+\r
+GLOBAL_REMOVE_IF_UNREFERENCED EFI_PEI_VECTOR_HANDOFF_INFO_PPI mVectorHandoffInfoPpi = {\r
+ &mVectorHandoffInfoDebugAgent[0]\r
+};\r
\r
-EFI_PEI_NOTIFY_DESCRIPTOR mMemoryDiscoveredNotifyList[1] = {\r
+//\r
+// Ppis to be installed\r
+//\r
+GLOBAL_REMOVE_IF_UNREFERENCED EFI_PEI_PPI_DESCRIPTOR mVectorHandoffInfoPpiList[] = {\r
+ {\r
+ (EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),\r
+ &gEfiVectorHandoffInfoPpiGuid,\r
+ &mVectorHandoffInfoPpi\r
+ }\r
+};\r
+\r
+GLOBAL_REMOVE_IF_UNREFERENCED EFI_PEI_NOTIFY_DESCRIPTOR mDebugAgentMemoryDiscoveredNotifyList[1] = {\r
{\r
(EFI_PEI_PPI_DESCRIPTOR_NOTIFY_CALLBACK | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),\r
&gEfiPeiMemoryDiscoveredPpiGuid,\r
//\r
// Try to read the start symbol\r
//\r
- DebugPortReadBuffer (Handle, Data8, 1, 0);\r
+ DebugAgentReadBuffer (Handle, Data8, 1, 0);\r
if (*Data8 == DEBUG_STARTING_SYMBOL_ATTACH) {\r
*BreakSymbol = *Data8;\r
DebugAgentMsgPrint (DEBUG_AGENT_INFO, "Debug Timer attach symbol received %x", *BreakSymbol);\r
return EFI_SUCCESS;\r
- } \r
+ }\r
if (*Data8 == DEBUG_STARTING_SYMBOL_NORMAL) {\r
Status = ReadRemainingBreakPacket (Handle, &DebugHeader);\r
if (Status == EFI_SUCCESS) {\r
}\r
}\r
}\r
- \r
+\r
return EFI_NOT_FOUND;\r
}\r
\r
UINT64 *MailboxLocationInIdt;\r
UINT64 *MailboxLocationInHob;\r
DEBUG_AGENT_MAILBOX *Mailbox;\r
- \r
+\r
//\r
// Get mailbox from IDT entry firstly\r
//\r
// If mailbox was setup in SEC or the current CPU arch is different from the init arch\r
// Debug Agent initialized, return the mailbox from IDT entry directly.\r
// Otherwise, we need to check the mailbox location saved in GUIDed HOB further.\r
- // \r
+ //\r
return Mailbox;\r
}\r
\r
MailboxLocationInHob = GetMailboxLocationFromHob ();\r
//\r
- // Compare mailbox in IDT enry with mailbox in HOB,\r
+ // Compare mailbox in IDT entry with mailbox in HOB,\r
// need to fix mailbox location if HOB moved by PEI CORE\r
//\r
if (MailboxLocationInHob != MailboxLocationInIdt && MailboxLocationInHob != NULL) {\r
// Fix up Debug Port handler and save new mailbox in IDT entry\r
//\r
Mailbox = (DEBUG_AGENT_MAILBOX *)((UINTN)Mailbox + ((UINTN)(MailboxLocationInHob) - (UINTN)MailboxLocationInIdt));\r
- DebugPortHandle = (UINT64)((UINTN)Mailbox->DebugPortHandle + ((UINTN)(MailboxLocationInHob) - (UINTN)MailboxLocationInIdt));\r
+ DebugPortHandle = (UINTN)Mailbox->DebugPortHandle + ((UINTN)(MailboxLocationInHob) - (UINTN)MailboxLocationInIdt);\r
UpdateMailboxContent (Mailbox, DEBUG_MAILBOX_DEBUG_PORT_HANDLE_INDEX, DebugPortHandle);\r
*MailboxLocationInHob = (UINT64)(UINTN)Mailbox;\r
SetLocationSavedMailboxPointerInIdtEntry (MailboxLocationInHob);\r
)\r
{\r
DEBUG_AGENT_MAILBOX *DebugAgentMailbox;\r
- \r
+\r
DebugAgentMailbox = GetMailboxPointer ();\r
\r
return (DEBUG_PORT_HANDLE) (UINTN)(DebugAgentMailbox->DebugPortHandle);\r
EFI_STATUS Status;\r
DEBUG_AGENT_MAILBOX *Mailbox;\r
BOOLEAN InterruptStatus;\r
- EFI_PHYSICAL_ADDRESS Address; \r
+ EFI_PHYSICAL_ADDRESS Address;\r
DEBUG_AGENT_MAILBOX *NewMailbox;\r
UINT64 *MailboxLocationInHob;\r
\r
// Restore interrupt state.\r
//\r
SetInterruptState (InterruptStatus);\r
- \r
+\r
return EFI_SUCCESS;\r
}\r
\r
\r
This function is used to set up debug environment for SEC and PEI phase.\r
\r
- If InitFlag is DEBUG_AGENT_INIT_PREMEM_SEC, it will overirde IDT table entries\r
+ If InitFlag is DEBUG_AGENT_INIT_PREMEM_SEC, it will override IDT table entries\r
and initialize debug port. It will enable interrupt to support break-in feature.\r
It will set up debug agent Mailbox in cache-as-ramfrom. It will be called before\r
physical memory is ready.\r
function and pass it into InitializeDebugAgent(). InitializeDebugAgent() is\r
responsible to invoke the passing-in function at the end of InitializeDebugAgent().\r
\r
- If the parameter Function is not NULL, Debug Agent Libary instance will invoke it by\r
+ If the parameter Function is not NULL, Debug Agent Library instance will invoke it by\r
passing in the Context to be its parameter.\r
\r
If Function() is NULL, Debug Agent Library instance will return after setup debug\r
)\r
{\r
DEBUG_AGENT_MAILBOX *Mailbox;\r
+ DEBUG_AGENT_MAILBOX *NewMailbox;\r
DEBUG_AGENT_MAILBOX MailboxInStack;\r
DEBUG_AGENT_PHASE2_CONTEXT Phase2Context;\r
DEBUG_AGENT_CONTEXT_POSTMEM_SEC *DebugAgentContext;\r
UINT64 DebugPortHandle;\r
UINT64 MailboxLocation;\r
UINT64 *MailboxLocationPointer;\r
- \r
- DisableInterrupts ();\r
+ EFI_PHYSICAL_ADDRESS Address;\r
+ UINT32 DebugTimerFrequency;\r
+ BOOLEAN CpuInterruptState;\r
+\r
+ //\r
+ // Disable interrupts and save current interrupt state\r
+ //\r
+ CpuInterruptState = SaveAndDisableInterrupts();\r
\r
switch (InitFlag) {\r
\r
// Save init arch type when debug agent initialized\r
//\r
SetDebugFlag (DEBUG_AGENT_FLAG_INIT_ARCH, DEBUG_ARCH_SYMBOL);\r
+ //\r
+ // Initialize Debug Timer hardware and save its frequency\r
+ //\r
+ InitializeDebugTimer (&DebugTimerFrequency, TRUE);\r
+ UpdateMailboxContent (Mailbox, DEBUG_MAILBOX_DEBUG_TIMER_FREQUENCY, DebugTimerFrequency);\r
\r
- InitializeDebugTimer ();\r
-\r
+ Phase2Context.InitFlag = InitFlag;\r
Phase2Context.Context = Context;\r
Phase2Context.Function = Function;\r
DebugPortInitialize ((VOID *) &Phase2Context, InitializeDebugAgentPhase2);\r
//\r
TriggerSoftInterrupt (MEMORY_READY_SIGNATURE);\r
}\r
-\r
//\r
- // Fix up Debug Port handle address and mailbox address\r
+ // Install Vector Handoff Info PPI to persist vectors used by Debug Agent\r
//\r
- DebugAgentContext = (DEBUG_AGENT_CONTEXT_POSTMEM_SEC *) Context;\r
- DebugPortHandle = (UINT64)(UINT32)(Mailbox->DebugPortHandle + DebugAgentContext->StackMigrateOffset);\r
- UpdateMailboxContent (Mailbox, DEBUG_MAILBOX_DEBUG_PORT_HANDLE_INDEX, DebugPortHandle);\r
- Mailbox = (DEBUG_AGENT_MAILBOX *) ((UINTN) Mailbox + DebugAgentContext->StackMigrateOffset);\r
- MailboxLocation = (UINT64)(UINTN)Mailbox;\r
+ Status = PeiServicesInstallPpi (&mVectorHandoffInfoPpiList[0]);\r
+ if (EFI_ERROR (Status)) {\r
+ DEBUG ((EFI_D_ERROR, "DebugAgent: Failed to install Vector Handoff Info PPI!\n"));\r
+ CpuDeadLoop ();\r
+ }\r
//\r
- // Build mailbox location in HOB and fix-up its address\r
+ // Fix up Debug Port handle address and mailbox address\r
//\r
- MailboxLocationPointer = BuildGuidDataHob (\r
- &gEfiDebugAgentGuid,\r
- &MailboxLocation,\r
- sizeof (UINT64)\r
- );\r
- MailboxLocationPointer = (UINT64 *) ((UINTN) MailboxLocationPointer + DebugAgentContext->HeapMigrateOffset);\r
+ DebugAgentContext = (DEBUG_AGENT_CONTEXT_POSTMEM_SEC *) Context;\r
+ if (DebugAgentContext != NULL) {\r
+ DebugPortHandle = (UINT64)(UINT32)(Mailbox->DebugPortHandle + DebugAgentContext->StackMigrateOffset);\r
+ UpdateMailboxContent (Mailbox, DEBUG_MAILBOX_DEBUG_PORT_HANDLE_INDEX, DebugPortHandle);\r
+ Mailbox = (DEBUG_AGENT_MAILBOX *) ((UINTN) Mailbox + DebugAgentContext->StackMigrateOffset);\r
+ MailboxLocation = (UINT64)(UINTN)Mailbox;\r
+ //\r
+ // Build mailbox location in HOB and fix-up its address\r
+ //\r
+ MailboxLocationPointer = BuildGuidDataHob (\r
+ &gEfiDebugAgentGuid,\r
+ &MailboxLocation,\r
+ sizeof (UINT64)\r
+ );\r
+ MailboxLocationPointer = (UINT64 *) ((UINTN) MailboxLocationPointer + DebugAgentContext->HeapMigrateOffset);\r
+ } else {\r
+ //\r
+ // DebugAgentContext is NULL. Then, Mailbox can directly be copied into memory.\r
+ // Allocate ACPI NVS memory for new Mailbox and Debug Port Handle buffer\r
+ //\r
+ Status = PeiServicesAllocatePages (\r
+ EfiACPIMemoryNVS,\r
+ EFI_SIZE_TO_PAGES (sizeof(DEBUG_AGENT_MAILBOX) + PcdGet16(PcdDebugPortHandleBufferSize)),\r
+ &Address\r
+ );\r
+ if (EFI_ERROR (Status)) {\r
+ DEBUG ((EFI_D_ERROR, "DebugAgent: Failed to allocate pages!\n"));\r
+ CpuDeadLoop ();\r
+ }\r
+ NewMailbox = (DEBUG_AGENT_MAILBOX *) (UINTN) Address;\r
+ //\r
+ // Copy Mailbox and Debug Port Handle buffer to new location in ACPI NVS memory, because original Mailbox\r
+ // and Debug Port Handle buffer in the allocated pool that may be marked as free by DXE Core after DXE Core\r
+ // reallocates the HOB.\r
+ //\r
+ CopyMem (NewMailbox, Mailbox, sizeof (DEBUG_AGENT_MAILBOX));\r
+ CopyMem (NewMailbox + 1, (VOID *)(UINTN)Mailbox->DebugPortHandle, PcdGet16(PcdDebugPortHandleBufferSize));\r
+ UpdateMailboxContent (NewMailbox, DEBUG_MAILBOX_DEBUG_PORT_HANDLE_INDEX, (UINT64)(UINTN)(NewMailbox + 1));\r
+ MailboxLocation = (UINT64)(UINTN)NewMailbox;\r
+ //\r
+ // Build mailbox location in HOB\r
+ //\r
+ MailboxLocationPointer = BuildGuidDataHob (\r
+ &gEfiDebugAgentGuid,\r
+ &MailboxLocation,\r
+ sizeof (UINT64)\r
+ );\r
+ }\r
//\r
// Update IDT entry to save the location saved mailbox pointer\r
//\r
SetLocationSavedMailboxPointerInIdtEntry (MailboxLocationPointer);\r
- //\r
- // Enable CPU interrupts so debug timer interrupts can be delivered\r
- //\r
- EnableInterrupts ();\r
-\r
break;\r
\r
case DEBUG_AGENT_INIT_PEI:\r
+ if (Context == NULL) {\r
+ DEBUG ((EFI_D_ERROR, "DebugAgent: Input parameter Context cannot be NULL!\n"));\r
+ CpuDeadLoop ();\r
+ }\r
//\r
// Check if Debug Agent has initialized before\r
//\r
break;\r
}\r
//\r
+ // Install Vector Handoff Info PPI to persist vectors used by Debug Agent\r
+ //\r
+ Status = PeiServicesInstallPpi (&mVectorHandoffInfoPpiList[0]);\r
+ if (EFI_ERROR (Status)) {\r
+ DEBUG ((EFI_D_ERROR, "DebugAgent: Failed to install Vector Handoff Info PPI!\n"));\r
+ CpuDeadLoop ();\r
+ }\r
+ //\r
// Set up IDT entries\r
//\r
InitializeDebugIdt ();\r
// Build mailbox in HOB and setup Mailbox Set In Pei flag\r
//\r
Mailbox = AllocateZeroPool (sizeof (DEBUG_AGENT_MAILBOX));\r
- MailboxLocation = (UINT64)(UINTN)Mailbox;\r
- MailboxLocationPointer = BuildGuidDataHob (\r
- &gEfiDebugAgentGuid,\r
- &MailboxLocation,\r
- sizeof (UINT64)\r
- );\r
-\r
- InitializeDebugTimer ();\r
- //\r
- // Update IDT entry to save the location pointer saved mailbox pointer\r
- //\r
- SetLocationSavedMailboxPointerInIdtEntry (MailboxLocationPointer);\r
+ if (Mailbox == NULL) {\r
+ DEBUG ((EFI_D_ERROR, "DebugAgent: Failed to allocate memory!\n"));\r
+ CpuDeadLoop ();\r
+ } else {\r
+ MailboxLocation = (UINT64)(UINTN)Mailbox;\r
+ MailboxLocationPointer = BuildGuidDataHob (\r
+ &gEfiDebugAgentGuid,\r
+ &MailboxLocation,\r
+ sizeof (UINT64)\r
+ );\r
+ //\r
+ // Initialize Debug Timer hardware and save its frequency\r
+ //\r
+ InitializeDebugTimer (&DebugTimerFrequency, TRUE);\r
+ UpdateMailboxContent (Mailbox, DEBUG_MAILBOX_DEBUG_TIMER_FREQUENCY, DebugTimerFrequency);\r
+ //\r
+ // Update IDT entry to save the location pointer saved mailbox pointer\r
+ //\r
+ SetLocationSavedMailboxPointerInIdtEntry (MailboxLocationPointer);\r
+ }\r
//\r
// Save init arch type when debug agent initialized\r
//\r
SetDebugFlag (DEBUG_AGENT_FLAG_INIT_ARCH, DEBUG_ARCH_SYMBOL);\r
//\r
// Register for a callback once memory has been initialized.\r
- // If memery has been ready, the callback funtion will be invoked immediately\r
+ // If memory has been ready, the callback function will be invoked immediately\r
//\r
- Status = PeiServicesNotifyPpi (&mMemoryDiscoveredNotifyList[0]);\r
- ASSERT_EFI_ERROR (Status);\r
+ Status = PeiServicesNotifyPpi (&mDebugAgentMemoryDiscoveredNotifyList[0]);\r
+ if (EFI_ERROR (Status)) {\r
+ DEBUG ((EFI_D_ERROR, "DebugAgent: Failed to register memory discovered callback function!\n"));\r
+ CpuDeadLoop ();\r
+ }\r
//\r
// Set HOB check flag if memory has not been ready yet\r
//\r
SetDebugFlag (DEBUG_AGENT_FLAG_CHECK_MAILBOX_IN_HOB, 1);\r
}\r
\r
+ Phase2Context.InitFlag = InitFlag;\r
Phase2Context.Context = Context;\r
Phase2Context.Function = Function;\r
DebugPortInitialize ((VOID *) &Phase2Context, InitializeDebugAgentPhase2);\r
} else {\r
Ia32Idtr = (IA32_DESCRIPTOR *) Context;\r
Ia32IdtEntry = (IA32_IDT_ENTRY *)(Ia32Idtr->Base);\r
- MailboxLocationPointer = (UINT64 *) (UINTN) (Ia32IdtEntry[DEBUG_MAILBOX_VECTOR].Bits.OffsetLow +\r
- (Ia32IdtEntry[DEBUG_MAILBOX_VECTOR].Bits.OffsetHigh << 16));\r
+ MailboxLocationPointer = (UINT64 *) ((UINTN) Ia32IdtEntry[DEBUG_MAILBOX_VECTOR].Bits.OffsetLow +\r
+ ((UINTN) Ia32IdtEntry[DEBUG_MAILBOX_VECTOR].Bits.OffsetHigh << 16));\r
Mailbox = (DEBUG_AGENT_MAILBOX *) (UINTN)(*MailboxLocationPointer);\r
//\r
// Mailbox should valid and setup before executing thunk code\r
\r
default:\r
//\r
- // Only DEBUG_AGENT_INIT_PREMEM_SEC and DEBUG_AGENT_INIT_POSTMEM_SEC are allowed for this \r
+ // Only DEBUG_AGENT_INIT_PREMEM_SEC and DEBUG_AGENT_INIT_POSTMEM_SEC are allowed for this\r
// Debug Agent library instance.\r
//\r
DEBUG ((EFI_D_ERROR, "Debug Agent: The InitFlag value is not allowed!\n"));\r
break;\r
}\r
\r
- EnableInterrupts ();\r
-\r
+ if (InitFlag == DEBUG_AGENT_INIT_POSTMEM_SEC) {\r
+ //\r
+ // Restore CPU Interrupt state and keep debug timer interrupt state as is\r
+ // in DEBUG_AGENT_INIT_POSTMEM_SEC case\r
+ //\r
+ SetInterruptState (CpuInterruptState);\r
+ } else {\r
+ //\r
+ // Enable Debug Timer interrupt\r
+ //\r
+ SaveAndSetDebugTimerInterrupt (TRUE);\r
+ //\r
+ // Enable CPU interrupts so debug timer interrupts can be delivered\r
+ //\r
+ EnableInterrupts ();\r
+ }\r
//\r
- // If Function is not NULL, invoke it always whatever debug agent was initialized sucesssfully or not.\r
+ // If Function is not NULL, invoke it always whatever debug agent was initialized successfully or not.\r
//\r
if (Function != NULL) {\r
Function (Context);\r
}\r
+ //\r
+ // Set return status for DEBUG_AGENT_INIT_PEI\r
+ //\r
+ if (InitFlag == DEBUG_AGENT_INIT_PEI && Context != NULL) {\r
+ *(EFI_STATUS *)Context = EFI_SUCCESS;\r
+ }\r
}\r
\r
/**\r
Caller provided function to be invoked at the end of DebugPortInitialize().\r
\r
- Refer to the descrption for DebugPortInitialize() for more details.\r
+ Refer to the description for DebugPortInitialize() for more details.\r
\r
@param[in] Context The first input argument of DebugPortInitialize().\r
- @param[in] DebugPortHandle Debug port handle created by Debug Communication Libary.\r
+ @param[in] DebugPortHandle Debug port handle created by Debug Communication Library.\r
\r
**/\r
VOID\r
MailboxLocation = GetLocationSavedMailboxPointerInIdtEntry ();\r
Mailbox = (DEBUG_AGENT_MAILBOX *)(UINTN)(*MailboxLocation);\r
BufferSize = PcdGet16(PcdDebugPortHandleBufferSize);\r
- if (Phase2Context->Function == NULL && DebugPortHandle != NULL && BufferSize != 0) {\r
+ if (Phase2Context->InitFlag == DEBUG_AGENT_INIT_PEI && BufferSize != 0) {\r
NewDebugPortHandle = (UINT64)(UINTN)AllocateCopyPool (BufferSize, DebugPortHandle);\r
} else {\r
NewDebugPortHandle = (UINT64)(UINTN)DebugPortHandle;\r
//\r
TriggerSoftInterrupt (SYSTEM_RESET_SIGNATURE);\r
\r
- //\r
- // If Temporary RAM region is below 128 MB, then send message to \r
- // host to disable low memory filtering.\r
- //\r
- SecCoreData = (EFI_SEC_PEI_HAND_OFF *)Phase2Context->Context;\r
- if ((UINTN)SecCoreData->TemporaryRamBase < BASE_128MB && IsHostAttached ()) {\r
- SetDebugFlag (DEBUG_AGENT_FLAG_MEMORY_READY, 1);\r
- TriggerSoftInterrupt (MEMORY_READY_SIGNATURE);\r
- }\r
-\r
- //\r
- // Enable CPU interrupts so debug timer interrupts can be delivered\r
- //\r
- EnableInterrupts ();\r
-\r
- //\r
- // Call continuation function if it is not NULL.\r
- //\r
- if (Phase2Context->Function != NULL) {\r
+ if (Phase2Context->InitFlag == DEBUG_AGENT_INIT_PREMEM_SEC) {\r
+ //\r
+ // If Temporary RAM region is below 128 MB, then send message to\r
+ // host to disable low memory filtering.\r
+ //\r
+ SecCoreData = (EFI_SEC_PEI_HAND_OFF *)Phase2Context->Context;\r
+ if ((UINTN)SecCoreData->TemporaryRamBase < BASE_128MB && IsHostAttached ()) {\r
+ SetDebugFlag (DEBUG_AGENT_FLAG_MEMORY_READY, 1);\r
+ TriggerSoftInterrupt (MEMORY_READY_SIGNATURE);\r
+ }\r
+ //\r
+ // Enable Debug Timer interrupt\r
+ //\r
+ SaveAndSetDebugTimerInterrupt (TRUE);\r
+ //\r
+ // Enable CPU interrupts so debug timer interrupts can be delivered\r
+ //\r
+ EnableInterrupts ();\r
+ //\r
+ // Call continuation function if it is not NULL.\r
+ //\r
Phase2Context->Function (Phase2Context->Context);\r
}\r
}\r
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