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Updated BaseLib for THUNK functions and some CPU functions

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git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@158 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
bxing
2006-05-15 11:14:20 +00:00
parent 7c28d0e095
commit 97d92bdaf0
9 changed files with 664 additions and 256 deletions
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41
MdePkg/Include/Library/BaseLib.h
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@@ -2969,15 +2969,16 @@ typedef union {
// Byte packed structure for an 16-bit real mode thunks
//
typedef struct {
IA32_REGISTER_SET RealModeState;
IA32_REGISTER_SET *RealModeState;
VOID *RealModeBuffer;
UINTN RealModeBufferSize;
VOID *CallStack;
UINTN CallStackSize;
VOID *RealModeCode;
UINTN RealModeCodeSize;
UINT32 RealModeBufferSize;
UINT32 ThunkAttributes;
} THUNK_CONTEXT;
#define THUNK_ATTRIBUTE_BIG_REAL_MODE 0x00000001
#define THUNK_ATTRIBUTE_DISABLE_A20_MASK_INT_15 0x00000002
#define THUNK_ATTRIBUTE_DISABLE_A20_MASK_KBD_CTRL 0x00000004
/**
Retrieves CPUID information.
@@ -4798,6 +4799,34 @@ AsmDisablePaging64 (
// 16-bit thunking services
//
/**
Retrieves the properties for 16-bit thunk functions.
Computes the size of the buffer and stack below 1MB required to use the
AsmPrepareThunk16(), AsmThunk16() and AsmPrepareAndThunk16() functions. This
buffer size is returned in RealModeBufferSize, and the stack size is returned
in ExtraStackSize. If parameters are passed to the 16-bit real mode code,
then the actual minimum stack size is ExtraStackSize plus the maximum number
of bytes that need to be passed to the 16-bit real mode code.
If RealModeBufferSize is NULL, then ASSERT().
If ExtraStackSize is NULL, then ASSERT().
@param RealModeBufferSize A pointer to the size of the buffer below 1MB
required to use the 16-bit thunk functions.
@param ExtraStackSize A pointer to the extra size of stack below 1MB
that the 16-bit thunk functions require for
temporary storage in the transition to and from
16-bit real mode.
**/
VOID
EFIAPI
AsmGetThunk16Properties (
OUT UINT32 *RealModeBufferSize,
OUT UINT32 *ExtraStackSize
);
/**
Prepares all structures a code required to use AsmThunk16().