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Allocate ACPImemoryNVS type memory to save mailbox and debug port handle buffer since original allocated pool memory may be marked as free by DXE Core. 

Signed-off-by: Jeff Fan <jeff.fan@intel.com>
Reviewed-by: Ruiyu Ni <ruiyu.ni@intel.com>

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@14285 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
vanjeff 2013-04-18 05:08:50 +00:00
parent 8908e764fe
commit dca18202a1
1 changed files with 34 additions and 6 deletions
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40
SourceLevelDebugPkg/Library/DebugAgent/SecPeiDebugAgent/SecPeiDebugAgentLib.c
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@ -244,23 +244,51 @@ DebugAgentCallbackMemoryDiscoveredPpi (
IN VOID *Ppi
)
{
EFI_STATUS Status;
DEBUG_AGENT_MAILBOX *Mailbox;
BOOLEAN InterruptStatus;
EFI_PHYSICAL_ADDRESS Memory;
DEBUG_AGENT_MAILBOX *NewMailbox;
UINT64 *MailboxLocationInHob;
//
// Save and disable original interrupt status
//
InterruptStatus = SaveAndDisableInterrupts ();
//
// Allocate ACPI NVS memory for new Mailbox and Debug Port Handle buffer
//
Status = PeiServicesAllocatePages (
EfiACPIMemoryNVS,
EFI_SIZE_TO_PAGES (sizeof(DEBUG_AGENT_MAILBOX) + PcdGet16(PcdDebugPortHandleBufferSize)),
&Memory
);
ASSERT_EFI_ERROR (Status);
NewMailbox = (DEBUG_AGENT_MAILBOX *) (UINTN) Memory;
//
// Copy Mailbox and Debug Port Handle buffer to new location in ACPI NVS memory, because original Mailbox
// and Debug Port Handle buffer in the allocated pool that may be marked as free by DXE Core after DXE Core
// reallocates the HOB.
//
Mailbox = GetMailboxPointer ();
CopyMem (NewMailbox, Mailbox, sizeof (DEBUG_AGENT_MAILBOX));
CopyMem (NewMailbox + 1, (VOID *)(UINTN)Mailbox->DebugPortHandle, PcdGet16(PcdDebugPortHandleBufferSize));
//
// Update Mailbox Location pointer in GUIDed HOB and IDT entry with new one
//
MailboxLocationInHob = GetMailboxLocationFromHob ();
*MailboxLocationInHob = (UINT64)(UINTN)NewMailbox;
SetLocationSavedMailboxPointerInIdtEntry (MailboxLocationInHob);
//
// Update Debug Port Handle in new Mailbox
//
UpdateMailboxContent (NewMailbox, DEBUG_MAILBOX_DEBUG_PORT_HANDLE_INDEX, (UINT64)(UINTN)(NewMailbox + 1));
//
// Set physical memory ready flag
//
Mailbox = GetMailboxPointer ();
SetDebugFlag (DEBUG_AGENT_FLAG_MEMORY_READY, 1);
//
// Memory has been ready
//
if (IsHostAttached ()) {
//
// Trigger one software interrupt to inform HOST