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system76-edk2/IntelFsp2Pkg/Library/BaseFspCommonLib/FspCommonLib.c
Satya Yarlagadda c44f9a42d4 IntelFsp2Pkg: Removing FSP Data Table 
FSP Base address is part of FSP_INFO_HEADER and we don't need additional
table to report the base address of FSP components. we expect Boot
loaders to parse the FSP INFO Header to get the base address. Also, this
the FSP_DATA_TABLE is not defined in the FSP EAS and we don't see a need
for it.

Cc: Maurice Ma <maurice.ma@intel.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Giri P Mudusuru <giri.p.mudusuru@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Satya Yarlagadda <satya.p.yarlagadda@intel.com>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>
Reviewed-by: Giri P Mudusuru <giri.p.mudusuru@intel.com>
2016-10-28 23:25:15 +08:00

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/** @file
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 <PiPei.h>
#include <Library/BaseLib.h>
#include <Library/DebugLib.h>
#include <Library/PcdLib.h>
#include <FspGlobalData.h>
#include <FspEas.h>
#include <Library/FspSwitchStackLib.h>
#pragma pack(1)
//
// API Parameter +0x34
// API return address +0x30
//
// push FspInfoHeader +0x2C
// pushfd +0x28
// cli
// pushad +0x24
// sub esp, 8 +0x00
// sidt fword ptr [esp]
//
typedef struct {
UINT16 IdtrLimit;
UINT32 IdtrBase;
UINT16 Reserved;
UINT32 Edi;
UINT32 Esi;
UINT32 Ebp;
UINT32 Esp;
UINT32 Ebx;
UINT32 Edx;
UINT32 Ecx;
UINT32 Eax;
UINT16 Flags[2];
UINT32 FspInfoHeader;
UINT32 ApiRet;
UINT32 ApiParam[2];
} CONTEXT_STACK;
#define CONTEXT_STACK_OFFSET(x) (UINT32)&((CONTEXT_STACK *)(UINTN)0)->x
#pragma pack()
/**
This function sets the FSP global data pointer.
@param[in] FspData FSP global data pointer.
**/
VOID
EFIAPI
SetFspGlobalDataPointer (
IN FSP_GLOBAL_DATA *FspData
)
{
ASSERT (FspData != NULL);
*((volatile UINT32 *)(UINTN)PcdGet32(PcdGlobalDataPointerAddress)) = (UINT32)(UINTN)FspData;
}
/**
This function gets the FSP global data pointer.
**/
FSP_GLOBAL_DATA *
EFIAPI
GetFspGlobalDataPointer (
VOID
)
{
FSP_GLOBAL_DATA *FspData;
FspData = *(FSP_GLOBAL_DATA **)(UINTN)PcdGet32(PcdGlobalDataPointerAddress);
return FspData;
}
/**
This function gets back the FSP API first parameter passed by the bootlaoder.
@retval ApiParameter FSP API first parameter passed by the bootlaoder.
**/
UINT32
EFIAPI
GetFspApiParameter (
VOID
)
{
FSP_GLOBAL_DATA *FspData;
FspData = GetFspGlobalDataPointer ();
return *(UINT32 *)(UINTN)(FspData->CoreStack + CONTEXT_STACK_OFFSET(ApiParam[0]));
}
/**
This function gets back the FSP API second parameter passed by the bootlaoder.
@retval ApiParameter FSP API second parameter passed by the bootlaoder.
**/
UINT32
EFIAPI
GetFspApiParameter2 (
VOID
)
{
FSP_GLOBAL_DATA *FspData;
FspData = GetFspGlobalDataPointer ();
return *(UINT32 *)(UINTN)(FspData->CoreStack + CONTEXT_STACK_OFFSET(ApiParam[1]));
}
/**
This function sets the FSP API parameter in the stack.
@param[in] Value New parameter value.
**/
VOID
EFIAPI
SetFspApiParameter (
IN UINT32 Value
)
{
FSP_GLOBAL_DATA *FspData;
FspData = GetFspGlobalDataPointer ();
*(UINT32 *)(UINTN)(FspData->CoreStack + CONTEXT_STACK_OFFSET(ApiParam)) = Value;
}
/**
This function set the API status code returned to the BootLoader.
@param[in] ReturnStatus Status code to return.
**/
VOID
EFIAPI
SetFspApiReturnStatus (
IN UINT32 ReturnStatus
)
{
FSP_GLOBAL_DATA *FspData;
FspData = GetFspGlobalDataPointer ();
*(UINT32 *)(UINTN)(FspData->CoreStack + CONTEXT_STACK_OFFSET(Eax)) = ReturnStatus;
}
/**
This function sets the context switching stack to a new stack frame.
@param[in] NewStackTop New core stack to be set.
**/
VOID
EFIAPI
SetFspCoreStackPointer (
IN VOID *NewStackTop
)
{
FSP_GLOBAL_DATA *FspData;
UINT32 *OldStack;
UINT32 *NewStack;
UINT32 StackContextLen;
FspData = GetFspGlobalDataPointer ();
StackContextLen = sizeof(CONTEXT_STACK) / sizeof(UINT32);
//
// Reserve space for the ContinuationFunc two parameters
//
OldStack = (UINT32 *)FspData->CoreStack;
NewStack = (UINT32 *)NewStackTop - StackContextLen - 2;
FspData->CoreStack = (UINT32)NewStack;
while (StackContextLen-- != 0) {
*NewStack++ = *OldStack++;
}
}
/**
This function sets the platform specific data pointer.
@param[in] PlatformData FSP platform specific data pointer.
**/
VOID
EFIAPI
SetFspPlatformDataPointer (
IN VOID *PlatformData
)
{
FSP_GLOBAL_DATA *FspData;
FspData = GetFspGlobalDataPointer ();
FspData->PlatformData.DataPtr = PlatformData;
}
/**
This function gets the platform specific data pointer.
@param[in] PlatformData FSP platform specific data pointer.
**/
VOID *
EFIAPI
GetFspPlatformDataPointer (
VOID
)
{
FSP_GLOBAL_DATA *FspData;
FspData = GetFspGlobalDataPointer ();
return FspData->PlatformData.DataPtr;
}
/**
This function sets the UPD data pointer.
@param[in] UpdDataPtr UPD data pointer.
**/
VOID
EFIAPI
SetFspUpdDataPointer (
IN VOID *UpdDataPtr
)
{
FSP_GLOBAL_DATA *FspData;
//
// Get the FSP Global Data Pointer
//
FspData = GetFspGlobalDataPointer ();
//
// Set the UPD pointer.
//
FspData->UpdDataPtr = UpdDataPtr;
}
/**
This function gets the UPD data pointer.
@return UpdDataPtr UPD data pointer.
**/
VOID *
EFIAPI
GetFspUpdDataPointer (
VOID
)
{
FSP_GLOBAL_DATA *FspData;
FspData = GetFspGlobalDataPointer ();
return FspData->UpdDataPtr;
}
/**
This function sets the FspMemoryInit UPD data pointer.
@param[in] MemoryInitUpdPtr FspMemoryInit UPD data pointer.
**/
VOID
EFIAPI
SetFspMemoryInitUpdDataPointer (
IN VOID *MemoryInitUpdPtr
)
{
FSP_GLOBAL_DATA *FspData;
//
// Get the FSP Global Data Pointer
//
FspData = GetFspGlobalDataPointer ();
//
// Set the FspMemoryInit UPD pointer.
//
FspData->MemoryInitUpdPtr = MemoryInitUpdPtr;
}
/**
This function gets the FspMemoryInit UPD data pointer.
@return FspMemoryInit UPD data pointer.
**/
VOID *
EFIAPI
GetFspMemoryInitUpdDataPointer (
VOID
)
{
FSP_GLOBAL_DATA *FspData;
FspData = GetFspGlobalDataPointer ();
return FspData->MemoryInitUpdPtr;
}
/**
This function sets the FspSiliconInit UPD data pointer.
@param[in] SiliconInitUpdPtr FspSiliconInit UPD data pointer.
**/
VOID
EFIAPI
SetFspSiliconInitUpdDataPointer (
IN VOID *SiliconInitUpdPtr
)
{
FSP_GLOBAL_DATA *FspData;
//
// Get the FSP Global Data Pointer
//
FspData = GetFspGlobalDataPointer ();
//
// Set the FspSiliconInit UPD data pointer.
//
FspData->SiliconInitUpdPtr = SiliconInitUpdPtr;
}
/**
This function gets the FspSiliconInit UPD data pointer.
@return FspSiliconInit UPD data pointer.
**/
VOID *
EFIAPI
GetFspSiliconInitUpdDataPointer (
VOID
)
{
FSP_GLOBAL_DATA *FspData;
FspData = GetFspGlobalDataPointer ();
return FspData->SiliconInitUpdPtr;
}
/**
Set FSP measurement point timestamp.
@param[in] Id Measurement point ID.
@return performance timestamp.
**/
UINT64
EFIAPI
SetFspMeasurePoint (
IN UINT8 Id
)
{
FSP_GLOBAL_DATA *FspData;
//
// Bit [55: 0] will be the timestamp
// Bit [63:56] will be the ID
//
FspData = GetFspGlobalDataPointer ();
if (FspData->PerfIdx < sizeof(FspData->PerfData) / sizeof(FspData->PerfData[0])) {
FspData->PerfData[FspData->PerfIdx] = AsmReadTsc ();
((UINT8 *)(&FspData->PerfData[FspData->PerfIdx]))[7] = Id;
}
return FspData->PerfData[(FspData->PerfIdx)++];
}
/**
This function gets the FSP info header pointer.
@retval FspInfoHeader FSP info header pointer
**/
FSP_INFO_HEADER *
EFIAPI
GetFspInfoHeader (
VOID
)
{
return GetFspGlobalDataPointer()->FspInfoHeader;
}
/**
This function sets the FSP info header pointer.
@param[in] FspInfoHeader FSP info header pointer
**/
VOID
EFIAPI
SetFspInfoHeader (
FSP_INFO_HEADER *FspInfoHeader
)
{
GetFspGlobalDataPointer()->FspInfoHeader = FspInfoHeader;
}
/**
This function gets the FSP info header pointer using the API stack context.
@retval FspInfoHeader FSP info header pointer using the API stack context
**/
FSP_INFO_HEADER *
EFIAPI
GetFspInfoHeaderFromApiContext (
VOID
)
{
FSP_GLOBAL_DATA *FspData;
FspData = GetFspGlobalDataPointer ();
return (FSP_INFO_HEADER *)(*(UINT32 *)(UINTN)(FspData->CoreStack + CONTEXT_STACK_OFFSET(FspInfoHeader)));
}
/**
This function gets the CfgRegion data pointer.
@return CfgRegion data pointer.
**/
VOID *
EFIAPI
GetFspCfgRegionDataPointer (
VOID
)
{
FSP_INFO_HEADER *FspInfoHeader;
FspInfoHeader = GetFspInfoHeader ();
return (VOID *)(FspInfoHeader->ImageBase + FspInfoHeader->CfgRegionOffset);
}
/**
This function gets FSP API calling index.
@retval API calling index
**/
UINT8
EFIAPI
GetFspApiCallingIndex (
VOID
)
{
return GetFspGlobalDataPointer()->ApiIdx;
}
/**
This function sets FSP API calling mode.
@param[in] Index API calling index
**/
VOID
EFIAPI
SetFspApiCallingIndex (
UINT8 Index
)
{
FSP_GLOBAL_DATA *FspData;
FspData = GetFspGlobalDataPointer ();
FspData->ApiIdx = Index;
}
/**
This function gets FSP Phase StatusCode.
@retval StatusCode
**/
UINT32
EFIAPI
GetPhaseStatusCode (
VOID
)
{
return GetFspGlobalDataPointer()->StatusCode;
}
/**
This function sets FSP Phase StatusCode.
@param[in] Mode Phase StatusCode
**/
VOID
EFIAPI
SetPhaseStatusCode (
UINT32 StatusCode
)
{
FSP_GLOBAL_DATA *FspData;
FspData = GetFspGlobalDataPointer ();
FspData->StatusCode = StatusCode;
}
/**
This function updates the return status of the FSP API with requested reset type and returns to Boot Loader.
@param[in] FspResetType Reset type that needs to returned as API return status
**/
VOID
EFIAPI
FspApiReturnStatusReset (
IN UINT32 FspResetType
)
{
volatile BOOLEAN LoopUntilReset;
LoopUntilReset = TRUE;
DEBUG ((DEBUG_INFO, "FSP returning control to Bootloader with reset required return status %x\n",FspResetType));
///
/// Below code is not an infinite loop.The control will go back to API calling function in BootLoader each time BootLoader
/// calls the FSP API without honoring the reset request by FSP
///
do {
SetFspApiReturnStatus ((EFI_STATUS)FspResetType);
Pei2LoaderSwitchStack ();
DEBUG ((DEBUG_ERROR, "!!!ERROR: FSP has requested BootLoader for reset. But BootLoader has not honored the reset\n"));
DEBUG ((DEBUG_ERROR, "!!!ERROR: Please add support in BootLoader to honor the reset request from FSP\n"));
} while (LoopUntilReset);
}
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