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• Set the default value of PcdDxeIplSwitchToLongMode to TRUE.

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•	Make access to PcdDxeIplSwitchToLongMode to Ia32 specific code.
•	Introduce another feature flag named PcdDxeIplBuildShareCodeHobs to define whether to build hobs to DXE core to share code.
•	Remove the #progma bug 

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@2026 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
qhuang8
2006-11-28 07:59:59 +00:00
parent 2109b16ef8
commit 657d3918fe
8 changed files with 235 additions and 294 deletions
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121
EdkModulePkg/Core/DxeIplPeim/Ia32/DxeLoadFunc.c
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@@ -21,66 +21,69 @@ Abstract:
#include "DxeIpl.h"
EFI_STATUS
CreateArchSpecificHobs (
OUT EFI_PHYSICAL_ADDRESS *BspStore
)
/*++
Routine Description:
Creates architecture-specific HOBs.
Note: New parameters should NOT be added for any HOBs that are added to this
function. BspStore is a special case because it is required for the
call to SwitchStacks() in DxeLoad().
Arguments:
BspStore - The address of the BSP Store for those architectures that need
it. Otherwise 0.
Returns:
EFI_SUCCESS - The HOBs were created successfully.
--*/
{
*BspStore = 0;
return EFI_SUCCESS;
}
/**
Transfers control to a function starting with a new stack.
Transfers control to the function specified by EntryPoint using the new stack
specified by NewStack and passing in the parameters specified by Context1 and
Context2. Context1 and Context2 are optional and may be NULL. The function
EntryPoint must never return.
If EntryPoint is NULL, then ASSERT().
If NewStack is NULL, then ASSERT().
@param EntryPoint A pointer to function to call with the new stack.
@param Context1 A pointer to the context to pass into the EntryPoint
function.
@param Context2 A pointer to the context to pass into the EntryPoint
function.
@param NewStack A pointer to the new stack to use for the EntryPoint
function.
@param NewBsp A pointer to the new BSP for the EntryPoint on IPF. It's
Reserved on other architectures.
**/
VOID
EFIAPI
SwitchIplStacks (
IN SWITCH_STACK_ENTRY_POINT EntryPoint,
IN VOID *Context1, OPTIONAL
IN VOID *Context2, OPTIONAL
IN VOID *NewStack,
IN VOID *NewBsp
HandOffToDxeCore (
IN EFI_PHYSICAL_ADDRESS DxeCoreEntryPoint,
IN EFI_PEI_HOB_POINTERS HobList
)
{
SwitchStack (EntryPoint, Context1, Context2, NewStack);
EFI_STATUS Status;
EFI_PHYSICAL_ADDRESS BaseOfStack;
EFI_PHYSICAL_ADDRESS TopOfStack;
EFI_PHYSICAL_ADDRESS PageTables;
Status = PeiServicesAllocatePages (EfiBootServicesData, EFI_SIZE_TO_PAGES (STACK_SIZE), &BaseOfStack);
ASSERT_EFI_ERROR (Status);
if (FeaturePcdGet(PcdDxeIplSwitchToLongMode)) {
//
// Compute the top of the stack we were allocated, which is used to load X64 dxe core.
// Pre-allocate a 32 bytes which confroms to x64 calling convention.
//
// The first four parameters to a function are passed in rcx, rdx, r8 and r9.
// Any further parameters are pushed on the stack. Furthermore, space (4 * 8bytes) for the
// register parameters is reserved on the stack, in case the called function
// wants to spill them; this is important if the function is variadic.
//
TopOfStack = BaseOfStack + EFI_SIZE_TO_PAGES (STACK_SIZE) * EFI_PAGE_SIZE - 32;
//
// X64 Calling Conventions requires that the stack must be aligned to 16 bytes
//
TopOfStack = (EFI_PHYSICAL_ADDRESS) (UINTN) ALIGN_POINTER (TopOfStack, 16);
//
// Load the GDT of Go64. Since the GDT of 32-bit Tiano locates in the BS_DATA
// memory, it may be corrupted when copying FV to high-end memory
//
LoadGo64Gdt();
//
// Limit to 36 bits of addressing for debug. Should get it from CPU
//
PageTables = CreateIdentityMappingPageTables (36);
//
// Go to Long Mode. Interrupts will not get turned on until the CPU AP is loaded.
// Call x64 drivers passing in single argument, a pointer to the HOBs.
//
ActivateLongMode (
PageTables,
(EFI_PHYSICAL_ADDRESS)(UINTN)(HobList.Raw),
TopOfStack,
0x00000000,
DxeCoreEntryPoint
);
} else {
//
// Compute the top of the stack we were allocated. Pre-allocate a UINTN
// for safety.
//
TopOfStack = BaseOfStack + EFI_SIZE_TO_PAGES (STACK_SIZE) * EFI_PAGE_SIZE - CPU_STACK_ALIGNMENT;
TopOfStack = (EFI_PHYSICAL_ADDRESS) (UINTN) ALIGN_POINTER (TopOfStack, CPU_STACK_ALIGNMENT);
SwitchStack (
(SWITCH_STACK_ENTRY_POINT)(UINTN)DxeCoreEntryPoint,
HobList.Raw,
NULL,
(VOID *) (UINTN) TopOfStack
);
}
}