cf1d454983
Add FSP2.0 support. This series of patch is to support FSP2.0 specification at https://firmware.intel.com/sites/default/files/FSP_EAS_v2.0_Draft%20External.pdf Some major updates include: 1) One FSP binary is separated to multiple components: FSP-T, FSP-M, FSP-S, and optional FSP-O. Each component has its own configuration data region. 2) All FSP-APIs use same UPD format - FSP_UPD_HEADER. 3) Add EnumInitPhaseEndOfFirmware notifyphase. 4) FSP1.1/FSP1.0 compatibility is NOT maintained. 5) We also add rename Fsp* to FspWrapper* in IntelFsp2WrapperPkg, to indicate that it is for FspWrapper only. IntelFspPkg and IntelFspWrapperPkg will be deprecated. The new Intel platform will follow FSP2.0 and use IntelFsp2Pkg and IntelFsp2WrapperPkg. The old platform can still use IntelFspPkg and IntelFspWrapperPkg for compatibility consideration. Cc: Giri P Mudusuru <giri.p.mudusuru@intel.com> Cc: Maurice Ma <maurice.ma@intel.com> Cc: Ravi P Rangarajan <ravi.p.rangarajan@intel.com> Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Jiewen Yao <jiewen.yao@intel.com> Reviewed-by: Giri P Mudusuru <giri.p.mudusuru@intel.com> Reviewed-by: Maurice Ma <maurice.ma@intel.com> Reviewed-by: Ravi P Rangarajan <ravi.p.rangarajan@intel.com>
109 lines
3.4 KiB
C
109 lines
3.4 KiB
C
/** @file
|
|
Execute 32-bit code in Long Mode.
|
|
Provide a thunk function to transition from long mode to compatibility mode to execute 32-bit code and then transit
|
|
back to long mode.
|
|
|
|
Copyright (c) 2014 - 2016, Intel Corporation. All rights reserved.<BR>
|
|
This program and the accompanying materials
|
|
are licensed and made available under the terms and conditions of the BSD License
|
|
which accompanies this distribution. The full text of the license may be found at
|
|
http://opensource.org/licenses/bsd-license.php.
|
|
|
|
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
|
|
|
|
**/
|
|
|
|
#include <Uefi.h>
|
|
#include <Library/BaseLib.h>
|
|
#include <FspEas.h>
|
|
|
|
#pragma pack(1)
|
|
typedef union {
|
|
struct {
|
|
UINT32 LimitLow : 16;
|
|
UINT32 BaseLow : 16;
|
|
UINT32 BaseMid : 8;
|
|
UINT32 Type : 4;
|
|
UINT32 System : 1;
|
|
UINT32 Dpl : 2;
|
|
UINT32 Present : 1;
|
|
UINT32 LimitHigh : 4;
|
|
UINT32 Software : 1;
|
|
UINT32 Reserved : 1;
|
|
UINT32 DefaultSize : 1;
|
|
UINT32 Granularity : 1;
|
|
UINT32 BaseHigh : 8;
|
|
} Bits;
|
|
UINT64 Uint64;
|
|
} IA32_GDT;
|
|
#pragma pack()
|
|
|
|
GLOBAL_REMOVE_IF_UNREFERENCED IA32_GDT mGdtEntries[] = {
|
|
{{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, /* 0x0: reserve */
|
|
{{0xFFFF, 0, 0, 0xB, 1, 0, 1, 0xF, 0, 0, 1, 1, 0}}, /* 0x8: compatibility mode */
|
|
{{0xFFFF, 0, 0, 0xB, 1, 0, 1, 0xF, 0, 1, 0, 1, 0}}, /* 0x10: for long mode */
|
|
{{0xFFFF, 0, 0, 0x3, 1, 0, 1, 0xF, 0, 0, 1, 1, 0}}, /* 0x18: data */
|
|
{{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, /* 0x20: reserve */
|
|
};
|
|
|
|
//
|
|
// IA32 Gdt register
|
|
//
|
|
GLOBAL_REMOVE_IF_UNREFERENCED IA32_DESCRIPTOR mGdt = {
|
|
sizeof (mGdtEntries) - 1,
|
|
(UINTN) mGdtEntries
|
|
};
|
|
|
|
/**
|
|
Assembly function to transition from long mode to compatibility mode to execute 32-bit code and then transit back to
|
|
long mode.
|
|
|
|
@param[in] Function The 32bit code entry to be executed.
|
|
@param[in] Param1 The first parameter to pass to 32bit code
|
|
@param[in] Param2 The second parameter to pass to 32bit code
|
|
@param[in] InternalGdtr The GDT and GDT descriptor used by this library
|
|
|
|
@return status.
|
|
**/
|
|
UINT32
|
|
AsmExecute32BitCode (
|
|
IN UINT64 Function,
|
|
IN UINT64 Param1,
|
|
IN UINT64 Param2,
|
|
IN IA32_DESCRIPTOR *InternalGdtr
|
|
);
|
|
|
|
/**
|
|
Wrapper for a thunk to transition from long mode to compatibility mode to execute 32-bit code and then transit back to
|
|
long mode.
|
|
|
|
@param[in] Function The 32bit code entry to be executed.
|
|
@param[in] Param1 The first parameter to pass to 32bit code.
|
|
@param[in] Param2 The second parameter to pass to 32bit code.
|
|
|
|
@return EFI_STATUS.
|
|
**/
|
|
EFI_STATUS
|
|
Execute32BitCode (
|
|
IN UINT64 Function,
|
|
IN UINT64 Param1,
|
|
IN UINT64 Param2
|
|
)
|
|
{
|
|
EFI_STATUS Status;
|
|
IA32_DESCRIPTOR Idtr;
|
|
|
|
//
|
|
// Idtr might be changed inside of FSP. 32bit FSP only knows the <4G address.
|
|
// If IDTR.Base is >4G, FSP can not handle. So we need save/restore IDTR here for X64 only.
|
|
// Interrupt is already disabled here, so it is safety to update IDTR.
|
|
//
|
|
AsmReadIdtr (&Idtr);
|
|
Status = AsmExecute32BitCode (Function, Param1, Param2, &mGdt);
|
|
AsmWriteIdtr (&Idtr);
|
|
|
|
return Status;
|
|
}
|
|
|