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UefiCpuPkg: Add CpuDxe driver for LoongArch64 

Added LoongArch64 CPU driver into CpuDxe.

BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=4734

Cc: Ray Ni <ray.ni@intel.com>
Cc: Rahul Kumar <rahul1.kumar@intel.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Chao Li <lichao@loongson.cn>
Co-authored-by: Baoqi Zhang <zhangbaoqi@loongson.cn>
Co-authored-by: Dongyan Qian <qiandongyan@loongson.cn>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Ray Ni <ray.ni@intel.com>
This commit is contained in:
Chao Li 2024-04-16 10:24:54 +08:00 committed by mergify[bot]
parent abaf405ed9
commit 0b2f97c00a
5 changed files with 1527 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

25
UefiCpuPkg/CpuDxe/CpuDxe.inf
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@ -3,6 +3,7 @@
#
# Copyright (c) 2008 - 2019, Intel Corporation. All rights reserved.<BR>
# Copyright (c) 2017, AMD Incorporated. All rights reserved.<BR>
# Copyright (c) 2024, Loongson Technology Corporation Limited. All rights reserved.<BR>
#
# SPDX-License-Identifier: BSD-2-Clause-Patent
#
@ -22,7 +23,7 @@
MdeModulePkg/MdeModulePkg.dec
UefiCpuPkg/UefiCpuPkg.dec
[LibraryClasses]
[LibraryClasses.common]
BaseLib
BaseMemoryLib
CpuExceptionHandlerLib
@ -30,9 +31,7 @@
DebugLib
DxeServicesTableLib
HobLib
LocalApicLib
MemoryAllocationLib
MtrrLib
MpInitLib
PeCoffGetEntryPointLib
ReportStatusCodeLib
@ -41,7 +40,15 @@
UefiDriverEntryPoint
UefiLib
[Sources]
[LibraryClasses.IA32, LibraryClasses.X64]
LocalApicLib
MtrrLib
[LibraryClasses.LoongArch64]
CacheMaintenanceLib
CpuMmuLib
[Sources.IA32, Sources.X64]
CpuDxe.c
CpuDxe.h
CpuGdt.c
@ -59,6 +66,13 @@
X64/CpuAsm.nasm
X64/PagingAttribute.c
[Sources.LoongArch64]
CpuMp.h
LoongArch64/CpuDxe.c
LoongArch64/CpuMp.c
LoongArch64/Exception.c
LoongArch64/CpuDxe.h
[Protocols]
gEfiCpuArchProtocolGuid ## PRODUCES
gEfiMpServiceProtocolGuid ## PRODUCES
@ -81,6 +95,9 @@
gUefiCpuPkgTokenSpaceGuid.PcdCpuStackSwitchExceptionList ## CONSUMES
gUefiCpuPkgTokenSpaceGuid.PcdCpuKnownGoodStackSize ## CONSUMES
[Pcd.LoongArch64]
gUefiCpuPkgTokenSpaceGuid.PcdLoongArchExceptionVectorBaseAddress ## CONSUMES
[Depex]
TRUE

515
UefiCpuPkg/CpuDxe/LoongArch64/CpuDxe.c Normal file
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@ -0,0 +1,515 @@
/** @file CpuDxe.c
CPU DXE Module to produce CPU ARCH Protocol.
Copyright (c) 2024, Loongson Technology Corporation Limited. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include "CpuDxe.h"
#include "CpuMp.h"
#include <Guid/IdleLoopEvent.h>
#include <Library/CpuMmuLib.h>
#include <Library/TimerLib.h>
#include <Register/LoongArch64/Csr.h>
UINT64 mTimerPeriod = 0;
/**
IPI Interrupt Handler.
@param InterruptType The type of interrupt that occurred
@param SystemContext A pointer to the system context when the interrupt occurred
**/
VOID
EFIAPI
IpiInterruptHandler (
IN EFI_EXCEPTION_TYPE InterruptType,
IN EFI_SYSTEM_CONTEXT SystemContext
);
//
// Globals used to initialize the protocol
//
EFI_HANDLE mCpuHandle = NULL;
EFI_CPU_ARCH_PROTOCOL gCpu = {
CpuFlushCpuDataCache,
CpuEnableInterrupt,
CpuDisableInterrupt,
CpuGetInterruptState,
CpuInit,
CpuRegisterInterruptHandler,
CpuGetTimerValue,
CpuSetMemoryAttributes,
0, // NumberOfTimers
4, // DmaBufferAlignment
};
/**
This function flushes the range of addresses from Start to Start+Length
from the processor's data cache. If Start is not aligned to a cache line
boundary, then the bytes before Start to the preceding cache line boundary
are also flushed. If Start+Length is not aligned to a cache line boundary,
then the bytes past Start+Length to the end of the next cache line boundary
are also flushed. The FlushType of EfiCpuFlushTypeWriteBackInvalidate must be
supported. If the data cache is fully coherent with all DMA operations, then
this function can just return EFI_SUCCESS. If the processor does not support
flushing a range of the data cache, then the entire data cache can be flushed.
@param This The EFI_CPU_ARCH_PROTOCOL instance.
@param Start The beginning physical address to flush from the processor's data
cache.
@param Length The number of bytes to flush from the processor's data cache. This
function may flush more bytes than Length specifies depending upon
the granularity of the flush operation that the processor supports.
@param FlushType Specifies the type of flush operation to perform.
@retval EFI_SUCCESS The address range from Start to Start+Length was flushed from
the processor's data cache.
@retval EFI_INVALID_PARAMETER The processor does not support the cache flush type specified
by FlushType.
**/
EFI_STATUS
EFIAPI
CpuFlushCpuDataCache (
IN EFI_CPU_ARCH_PROTOCOL *This,
IN EFI_PHYSICAL_ADDRESS Start,
IN UINT64 Length,
IN EFI_CPU_FLUSH_TYPE FlushType
)
{
switch (FlushType) {
case EfiCpuFlushTypeWriteBack:
WriteBackDataCacheRange ((VOID *)(UINTN)Start, (UINTN)Length);
break;
case EfiCpuFlushTypeInvalidate:
InvalidateDataCacheRange ((VOID *)(UINTN)Start, (UINTN)Length);
break;
case EfiCpuFlushTypeWriteBackInvalidate:
WriteBackInvalidateDataCacheRange ((VOID *)(UINTN)Start, (UINTN)Length);
break;
default:
return EFI_INVALID_PARAMETER;
}
return EFI_SUCCESS;
}
/**
This function enables interrupt processing by the processor.
@param This The EFI_CPU_ARCH_PROTOCOL instance.
@retval EFI_SUCCESS Interrupts are enabled on the processor.
@retval EFI_DEVICE_ERROR Interrupts could not be enabled on the processor.
**/
EFI_STATUS
EFIAPI
CpuEnableInterrupt (
IN EFI_CPU_ARCH_PROTOCOL *This
)
{
EnableInterrupts ();
return EFI_SUCCESS;
}
/**
This function disables interrupt processing by the processor.
@param This The EFI_CPU_ARCH_PROTOCOL instance.
@retval EFI_SUCCESS Interrupts are disabled on the processor.
@retval EFI_DEVICE_ERROR Interrupts could not be disabled on the processor.
**/
EFI_STATUS
EFIAPI
CpuDisableInterrupt (
IN EFI_CPU_ARCH_PROTOCOL *This
)
{
DisableInterrupts ();
return EFI_SUCCESS;
}
/**
This function retrieves the processor's current interrupt state a returns it in
State. If interrupts are currently enabled, then TRUE is returned. If interrupts
are currently disabled, then FALSE is returned.
@param This The EFI_CPU_ARCH_PROTOCOL instance.
@param State A pointer to the processor's current interrupt state. Set to TRUE if
interrupts are enabled and FALSE if interrupts are disabled.
@retval EFI_SUCCESS The processor's current interrupt state was returned in State.
@retval EFI_INVALID_PARAMETER State is NULL.
**/
EFI_STATUS
EFIAPI
CpuGetInterruptState (
IN EFI_CPU_ARCH_PROTOCOL *This,
OUT BOOLEAN *State
)
{
if (State == NULL) {
return EFI_INVALID_PARAMETER;
}
*State = GetInterruptState ();
return EFI_SUCCESS;
}
/**
This function generates an INIT on the processor. If this function succeeds, then the
processor will be reset, and control will not be returned to the caller. If InitType is
not supported by this processor, or the processor cannot programmatically generate an
INIT without help from external hardware, then EFI_UNSUPPORTED is returned. If an error
occurs attempting to generate an INIT, then EFI_DEVICE_ERROR is returned.
@param This The EFI_CPU_ARCH_PROTOCOL instance.
@param InitType The type of processor INIT to perform.
@retval EFI_SUCCESS The processor INIT was performed. This return code should never be seen.
@retval EFI_UNSUPPORTED The processor INIT operation specified by InitType is not supported
by this processor.
@retval EFI_DEVICE_ERROR The processor INIT failed.
**/
EFI_STATUS
EFIAPI
CpuInit (
IN EFI_CPU_ARCH_PROTOCOL *This,
IN EFI_CPU_INIT_TYPE InitType
)
{
return EFI_UNSUPPORTED;
}
/**
Registers a function to be called from the CPU interrupt handler.
@param This Protocol instance structure
@param InterruptType Defines which interrupt to hook. IA-32
valid range is 0x00 through 0xFF
@param InterruptHandler A pointer to a function of type
EFI_CPU_INTERRUPT_HANDLER that is called
when a processor interrupt occurs. A null
pointer is an error condition.
@retval EFI_SUCCESS If handler installed or uninstalled.
@retval EFI_ALREADY_STARTED InterruptHandler is not NULL, and a handler
for InterruptType was previously installed.
@retval EFI_INVALID_PARAMETER InterruptHandler is NULL, and a handler for
InterruptType was not previously installed.
@retval EFI_UNSUPPORTED The interrupt specified by InterruptType
is not supported.
**/
EFI_STATUS
EFIAPI
CpuRegisterInterruptHandler (
IN EFI_CPU_ARCH_PROTOCOL *This,
IN EFI_EXCEPTION_TYPE InterruptType,
IN EFI_CPU_INTERRUPT_HANDLER InterruptHandler
)
{
return RegisterInterruptHandler (InterruptType, InterruptHandler);
}
/**
Returns a timer value from one of the CPU's internal timers. There is no
inherent time interval between ticks but is a function of the CPU frequency.
@param This - Protocol instance structure.
@param TimerIndex - Specifies which CPU timer is requested.
@param TimerValue - Pointer to the returned timer value.
@param TimerPeriod - A pointer to the amount of time that passes
in femtoseconds (10-15) for each increment
of TimerValue. If TimerValue does not
increment at a predictable rate, then 0 is
returned. The amount of time that has
passed between two calls to GetTimerValue()
can be calculated with the formula
(TimerValue2 - TimerValue1) * TimerPeriod.
This parameter is optional and may be NULL.
@retval EFI_SUCCESS - If the CPU timer count was returned.
@retval EFI_UNSUPPORTED - If the CPU does not have any readable timers.
@retval EFI_DEVICE_ERROR - If an error occurred while reading the timer.
@retval EFI_INVALID_PARAMETER - TimerIndex is not valid or TimerValue is NULL.
**/
EFI_STATUS
EFIAPI
CpuGetTimerValue (
IN EFI_CPU_ARCH_PROTOCOL *This,
IN UINT32 TimerIndex,
OUT UINT64 *TimerValue,
OUT UINT64 *TimerPeriod OPTIONAL
)
{
UINT64 BeginValue;
UINT64 EndValue;
if (TimerValue == NULL) {
return EFI_INVALID_PARAMETER;
}
if (TimerIndex != 0) {
return EFI_INVALID_PARAMETER;
}
*TimerValue = AsmReadStableCounter ();
if (TimerPeriod != NULL) {
if (mTimerPeriod == 0) {
//
// Read time stamp counter before and after delay of 100 microseconds
//
BeginValue = AsmReadStableCounter ();
MicroSecondDelay (100);
EndValue = AsmReadStableCounter ();
//
// Calculate the actual frequency
//
mTimerPeriod = DivU64x64Remainder (
MultU64x32 (
1000 * 1000 * 1000,
100
),
EndValue - BeginValue,
NULL
);
}
*TimerPeriod = mTimerPeriod;
}
return EFI_SUCCESS;
}
/**
This function modifies the attributes for the memory region specified by BaseAddress and
Length from their current attributes to the attributes specified by Attributes.
@param This The EFI_CPU_ARCH_PROTOCOL instance.
@param BaseAddress The physical address that is the start address of a memory region.
@param Length The size in bytes of the memory region.
@param EfiAttributes The bit mask of attributes to set for the memory region.
@retval EFI_SUCCESS The attributes were set for the memory region.
@retval EFI_ACCESS_DENIED The attributes for the memory resource range specified by
BaseAddress and Length cannot be modified.
@retval EFI_INVALID_PARAMETER Length is zero.
@retval EFI_OUT_OF_RESOURCES There are not enough system resources to modify the attributes of
the memory resource range.
@retval EFI_UNSUPPORTED The processor does not support one or more bytes of the memory
resource range specified by BaseAddress and Length.
The bit mask of attributes is not support for the memory resource
range specified by BaseAddress and Length.
**/
EFI_STATUS
EFIAPI
CpuSetMemoryAttributes (
IN EFI_CPU_ARCH_PROTOCOL *This,
IN EFI_PHYSICAL_ADDRESS BaseAddress,
IN UINT64 Length,
IN UINT64 EfiAttributes
)
{
EFI_STATUS Status;
UINTN PageTable;
UINT64 PageWalkCfg;
Status = EFI_SUCCESS;
PageTable = CsrRead (LOONGARCH_CSR_PGDL);
PageWalkCfg = ((UINT64)CsrRead (LOONGARCH_CSR_PWCTL1)) << 32 | CsrRead (LOONGARCH_CSR_PWCTL0);
if ((BaseAddress & (EFI_PAGE_SIZE - 1)) != 0) {
//
// Minimum granularity is SIZE_4KB.
//
DEBUG ((
DEBUG_INFO,
"MemoryRegionMap(%lx, %lx, %lx, %lx, %lx): Minimum granularity is SIZE_4KB\n",
&PageTable,
PageWalkCfg,
BaseAddress,
Length,
EfiAttributes
));
Status = EFI_UNSUPPORTED;
return Status;
}
Status = MemoryRegionMap (
&PageTable,
PageWalkCfg,
BaseAddress,
Length,
EfiAttributes,
0x0
);
ASSERT_EFI_ERROR (Status);
return Status;
}
/**
Callback function for idle events.
@param Event Event whose notification function is being invoked.
@param Context The pointer to the notification function's context,
which is implementation-dependent.
**/
VOID
EFIAPI
IdleLoopEventCallback (
IN EFI_EVENT Event,
IN VOID *Context
)
{
CpuSleep ();
}
/**
Refreshes the GCD Memory Space attributes according to Default Config
This function refreshes the GCD Memory Space attributes according to DefaultConfig
@retval EFI_SUCCESS Refresh GCD success.
**/
EFI_STATUS
RefreshGcdMemoryAttributes (
VOID
)
{
EFI_STATUS Status;
UINT32 Index;
UINTN NumberOfDescriptors;
EFI_GCD_MEMORY_SPACE_DESCRIPTOR *MemorySpaceMap;
DEBUG ((DEBUG_PAGE, "RefreshGcdMemoryAttributes()\n"));
//
// Get the memory space map from GCD
//
MemorySpaceMap = NULL;
Status = gDS->GetMemorySpaceMap (&NumberOfDescriptors, &MemorySpaceMap);
if (EFI_ERROR (Status)) {
DEBUG ((
DEBUG_ERROR,
"RefreshGcdMemoryAttributes - GetMemorySpaceMap() failed! Status: %r\n",
Status
));
ASSERT_EFI_ERROR (Status);
return Status;
}
for ( Index = 0; Index < NumberOfDescriptors; Index++ ) {
//
// If this is system memory, not a class resource like MMIO, and the capability
// contains a Memory cacheability attributes and the attribute feature is set
// to 0, we will set its attribute to the WriteBack memory of the LoongArch
// architecture for the first time.
//
if (((MemorySpaceMap[Index].GcdMemoryType == EfiGcdMemoryTypeSystemMemory) &&
MemorySpaceMap[Index].Capabilities & EFI_CACHE_ATTRIBUTE_MASK) &&
(MemorySpaceMap[Index].Attributes == 0))
{
if (!(MemorySpaceMap[Index].Capabilities & EFI_MEMORY_WB)) {
DEBUG ((
DEBUG_WARN,
"RefreshGcdMemoryAttributes - SystemMemory Capabilities should support EFI_MEMORY_WB ! \n"
));
}
//
// Refresh or Sync Gcd's memory attributes according to Default Paging (CACHE_CC)
//
gDS->SetMemorySpaceAttributes (
MemorySpaceMap[Index].BaseAddress,
MemorySpaceMap[Index].Length,
(MemorySpaceMap[Index].Attributes & ~EFI_CACHE_ATTRIBUTE_MASK) |
(MemorySpaceMap[Index].Capabilities & EFI_MEMORY_WB)
);
}
}
return EFI_SUCCESS;
}
/**
Initialize the state information for the CPU Architectural Protocol.
@param ImageHandle Image handle this driver.
@param SystemTable Pointer to the System Table.
@retval EFI_SUCCESS Thread can be successfully created
@retval EFI_OUT_OF_RESOURCES Cannot allocate protocol data structure
@retval EFI_DEVICE_ERROR Cannot create the thread
**/
EFI_STATUS
InitializeCpu (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
EFI_EVENT IdleLoopEvent;
InitializeExceptions (&gCpu);
Status = gBS->InstallMultipleProtocolInterfaces (
&mCpuHandle,
&gEfiCpuArchProtocolGuid,
&gCpu,
NULL
);
ASSERT_EFI_ERROR (Status);
//
// Refresh GCD memory space map according to Default Paging.
//
RefreshGcdMemoryAttributes ();
Status = gCpu.RegisterInterruptHandler (
&gCpu,
EXCEPT_LOONGARCH_INT_IPI,
IpiInterruptHandler
);
ASSERT_EFI_ERROR (Status);
//
// Setup a callback for idle events
//
Status = gBS->CreateEventEx (
EVT_NOTIFY_SIGNAL,
TPL_NOTIFY,
IdleLoopEventCallback,
NULL,
&gIdleLoopEventGuid,
&IdleLoopEvent
);
ASSERT_EFI_ERROR (Status);
InitializeMpSupport ();
return Status;
}

288
UefiCpuPkg/CpuDxe/LoongArch64/CpuDxe.h Normal file
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@ -0,0 +1,288 @@
/** @file CpuDxe.c
CPU DXE Module to produce CPU ARCH Protocol.
Copyright (c) 2024, Loongson Technology Corporation Limited. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#ifndef CPU_DXE_H_
#define CPU_DXE_H_
#include <Uefi.h>
#include <Library/BaseMemoryLib.h>
#include <Library/CacheMaintenanceLib.h>
#include <Library/CpuLib.h>
#include <Library/DebugLib.h>
#include <Library/DxeServicesTableLib.h>
#include <Library/MpInitLib.h>
#include <Library/PcdLib.h>
#include <Library/PeCoffGetEntryPointLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/UefiLib.h>
#include <Guid/DebugImageInfoTable.h>
#include <Protocol/Cpu.h>
#include <Protocol/DebugSupport.h>
#include <Protocol/LoadedImage.h>
//
// For coding convenience, define the maximum valid
// LoongArch exception.
// Since UEFI V2.11, it will be present in DebugSupport.h.
//
#define MAX_LOONGARCH_EXCEPTION 64
/*
This function flushes the range of addresses from Start to Start+Length
from the processor's data cache. If Start is not aligned to a cache line
boundary, then the bytes before Start to the preceding cache line boundary
are also flushed. If Start+Length is not aligned to a cache line boundary,
then the bytes past Start+Length to the end of the next cache line boundary
are also flushed. The FlushType of EfiCpuFlushTypeWriteBackInvalidate must be
supported. If the data cache is fully coherent with all DMA operations, then
this function can just return EFI_SUCCESS. If the processor does not support
flushing a range of the data cache, then the entire data cache can be flushed.
@param This The EFI_CPU_ARCH_PROTOCOL instance.
@param Start The beginning physical address to flush from the processor's data
cache.
@param Length The number of bytes to flush from the processor's data cache. This
function may flush more bytes than Length specifies depending upon
the granularity of the flush operation that the processor supports.
@param FlushType Specifies the type of flush operation to perform.
@retval EFI_SUCCESS The address range from Start to Start+Length was flushed from
the processor's data cache.
@retval EFI_UNSUPPORTEDT The processor does not support the cache flush type specified
by FlushType.
@retval EFI_DEVICE_ERROR The address range from Start to Start+Length could not be flushed
from the processor's data cache.
**/
EFI_STATUS
EFIAPI
CpuFlushCpuDataCache (
IN EFI_CPU_ARCH_PROTOCOL *This,
IN EFI_PHYSICAL_ADDRESS Start,
IN UINT64 Length,
IN EFI_CPU_FLUSH_TYPE FlushType
);
/**
This function enables interrupt processing by the processor.
@param This The EFI_CPU_ARCH_PROTOCOL instance.
@retval EFI_SUCCESS Interrupts are enabled on the processor.
@retval EFI_DEVICE_ERROR Interrupts could not be enabled on the processor.
**/
EFI_STATUS
EFIAPI
CpuEnableInterrupt (
IN EFI_CPU_ARCH_PROTOCOL *This
);
/**
This function disables interrupt processing by the processor.
@param This The EFI_CPU_ARCH_PROTOCOL instance.
@retval EFI_SUCCESS Interrupts are disabled on the processor.
@retval EFI_DEVICE_ERROR Interrupts could not be disabled on the processor.
**/
EFI_STATUS
EFIAPI
CpuDisableInterrupt (
IN EFI_CPU_ARCH_PROTOCOL *This
);
/**
This function retrieves the processor's current interrupt state a returns it in
State. If interrupts are currently enabled, then TRUE is returned. If interrupts
are currently disabled, then FALSE is returned.
@param This The EFI_CPU_ARCH_PROTOCOL instance.
@param State A pointer to the processor's current interrupt state. Set to TRUE if
interrupts are enabled and FALSE if interrupts are disabled.
@retval EFI_SUCCESS The processor's current interrupt state was returned in State.
@retval EFI_INVALID_PARAMETER State is NULL.
**/
EFI_STATUS
EFIAPI
CpuGetInterruptState (
IN EFI_CPU_ARCH_PROTOCOL *This,
OUT BOOLEAN *State
);
/**
This function generates an INIT on the processor. If this function succeeds, then the
processor will be reset, and control will not be returned to the caller. If InitType is
not supported by this processor, or the processor cannot programmatically generate an
INIT without help from external hardware, then EFI_UNSUPPORTED is returned. If an error
occurs attempting to generate an INIT, then EFI_DEVICE_ERROR is returned.
@param This The EFI_CPU_ARCH_PROTOCOL instance.
@param InitType The type of processor INIT to perform.
@retval EFI_SUCCESS The processor INIT was performed. This return code should never be seen.
@retval EFI_UNSUPPORTED The processor INIT operation specified by InitType is not supported
by this processor.
@retval EFI_DEVICE_ERROR The processor INIT failed.
**/
EFI_STATUS
EFIAPI
CpuInit (
IN EFI_CPU_ARCH_PROTOCOL *This,
IN EFI_CPU_INIT_TYPE InitType
);
/**
Registers a function to be called from the CPU interrupt handler.
@param This Protocol instance structure
@param InterruptType Defines which interrupt to hook. IA-32
valid range is 0x00 through 0xFF
@param InterruptHandler A pointer to a function of type
EFI_CPU_INTERRUPT_HANDLER that is called
when a processor interrupt occurs. A null
pointer is an error condition.
@retval EFI_SUCCESS If handler installed or uninstalled.
@retval EFI_ALREADY_STARTED InterruptHandler is not NULL, and a handler
for InterruptType was previously installed.
@retval EFI_INVALID_PARAMETER InterruptHandler is NULL, and a handler for
InterruptType was not previously installed.
@retval EFI_UNSUPPORTED The interrupt specified by InterruptType
is not supported.
**/
EFI_STATUS
EFIAPI
CpuRegisterInterruptHandler (
IN EFI_CPU_ARCH_PROTOCOL *This,
IN EFI_EXCEPTION_TYPE InterruptType,
IN EFI_CPU_INTERRUPT_HANDLER InterruptHandler
);
/**
Returns a timer value from one of the CPU's internal timers. There is no
inherent time interval between ticks but is a function of the CPU frequency.
@param This - Protocol instance structure.
@param TimerIndex - Specifies which CPU timer is requested.
@param TimerValue - Pointer to the returned timer value.
@param TimerPeriod - A pointer to the amount of time that passes
in femtoseconds (10-15) for each increment
of TimerValue. If TimerValue does not
increment at a predictable rate, then 0 is
returned. The amount of time that has
passed between two calls to GetTimerValue()
can be calculated with the formula
(TimerValue2 - TimerValue1) * TimerPeriod.
This parameter is optional and may be NULL.
@retval EFI_SUCCESS - If the CPU timer count was returned.
@retval EFI_UNSUPPORTED - If the CPU does not have any readable timers.
@retval EFI_DEVICE_ERROR - If an error occurred while reading the timer.
@retval EFI_INVALID_PARAMETER - TimerIndex is not valid or TimerValue is NULL.
**/
EFI_STATUS
EFIAPI
CpuGetTimerValue (
IN EFI_CPU_ARCH_PROTOCOL *This,
IN UINT32 TimerIndex,
OUT UINT64 *TimerValue,
OUT UINT64 *TimerPeriod OPTIONAL
);
/**
This function registers and enables the handler specified by InterruptHandler for a processor
interrupt or exception type specified by InterruptType. If InterruptHandler is NULL, then the
handler for the processor interrupt or exception type specified by InterruptType is uninstalled.
The installed handler is called once for each processor interrupt or exception.
@param InterruptType A pointer to the processor's current interrupt state. Set to TRUE if interrupts
are enabled and FALSE if interrupts are disabled.
@param InterruptHandler A pointer to a function of type EFI_CPU_INTERRUPT_HANDLER that is called
when a processor interrupt occurs. If this parameter is NULL, then the handler
will be uninstalled.
@retval EFI_SUCCESS The handler for the processor interrupt was successfully installed or uninstalled.
@retval EFI_ALREADY_STARTED InterruptHandler is not NULL, and a handler for InterruptType was
previously installed.
@retval EFI_INVALID_PARAMETER InterruptHandler is NULL, and a handler for InterruptType was not
previously installed.
@retval EFI_UNSUPPORTED The interrupt specified by InterruptType is not supported.
**/
EFI_STATUS
RegisterInterruptHandler (
IN EFI_EXCEPTION_TYPE InterruptType,
IN EFI_CPU_INTERRUPT_HANDLER InterruptHandler
);
/**
This function modifies the attributes for the memory region specified by BaseAddress and
Length from their current attributes to the attributes specified by Attributes.
@param This The EFI_CPU_ARCH_PROTOCOL instance.
@param BaseAddress The physical address that is the start address of a memory region.
@param Length The size in bytes of the memory region.
@param Attributes The bit mask of attributes to set for the memory region.
@retval EFI_SUCCESS The attributes were set for the memory region.
@retval EFI_ACCESS_DENIED The attributes for the memory resource range specified by
BaseAddress and Length cannot be modified.
@retval EFI_INVALID_PARAMETER Length is zero.
@retval EFI_OUT_OF_RESOURCES There are not enough system resources to modify the attributes of
the memory resource range.
@retval EFI_UNSUPPORTED The processor does not support one or more bytes of the memory
resource range specified by BaseAddress and Length.
The bit mask of attributes is not support for the memory resource
range specified by BaseAddress and Length.
**/
EFI_STATUS
EFIAPI
CpuSetMemoryAttributes (
IN EFI_CPU_ARCH_PROTOCOL *This,
IN EFI_PHYSICAL_ADDRESS BaseAddress,
IN UINT64 Length,
IN UINT64 Attributes
);
/**
Initialize interrupt handling for DXE phase.
@param Cpu A pointer of EFI_CPU_ARCH_PROTOCOL instance.
@return VOID.
**/
VOID
InitializeExceptions (
IN EFI_CPU_ARCH_PROTOCOL *gCpu
);
/**
Converts EFI Attributes to corresponding architecture Attributes.
@param[in] EfiAttributes Efi Attributes.
@retval Corresponding architecture attributes.
**/
UINTN
EFIAPI
EfiAttributeConverse (
IN UINTN EfiAttributes
);
#endif // CPU_DXE_H_

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/** @file
CPU DXE Module to produce CPU MP Protocol.
Copyright (c) 2024, Loongson Technology Corporation Limited. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include "CpuDxe.h"
#include "CpuMp.h"
EFI_HANDLE mMpServiceHandle = NULL;
UINTN mNumberOfProcessors = 1;
EFI_MP_SERVICES_PROTOCOL mMpServicesTemplate = {
GetNumberOfProcessors,
GetProcessorInfo,
StartupAllAPs,
StartupThisAP,
SwitchBSP,
EnableDisableAP,
WhoAmI
};
/**
This service retrieves the number of logical processor in the platform
and the number of those logical processors that are enabled on this boot.
This service may only be called from the BSP.
This function is used to retrieve the following information:
- The number of logical processors that are present in the system.
- The number of enabled logical processors in the system at the instant
this call is made.
Because MP Service Protocol provides services to enable and disable processors
dynamically, the number of enabled logical processors may vary during the
course of a boot session.
If this service is called from an AP, then EFI_DEVICE_ERROR is returned.
If NumberOfProcessors or NumberOfEnabledProcessors is NULL, then
EFI_INVALID_PARAMETER is returned. Otherwise, the total number of processors
is returned in NumberOfProcessors, the number of currently enabled processor
is returned in NumberOfEnabledProcessors, and EFI_SUCCESS is returned.
@param[in] This A pointer to the EFI_MP_SERVICES_PROTOCOL
instance.
@param[out] NumberOfProcessors Pointer to the total number of logical
processors in the system, including the BSP
and disabled APs.
@param[out] NumberOfEnabledProcessors Pointer to the number of enabled logical
processors that exist in system, including
the BSP.
@retval EFI_SUCCESS The number of logical processors and enabled
logical processors was retrieved.
@retval EFI_DEVICE_ERROR The calling processor is an AP.
@retval EFI_INVALID_PARAMETER NumberOfProcessors is NULL.
@retval EFI_INVALID_PARAMETER NumberOfEnabledProcessors is NULL.
**/
EFI_STATUS
EFIAPI
GetNumberOfProcessors (
IN EFI_MP_SERVICES_PROTOCOL *This,
OUT UINTN *NumberOfProcessors,
OUT UINTN *NumberOfEnabledProcessors
)
{
if ((NumberOfProcessors == NULL) || (NumberOfEnabledProcessors == NULL)) {
return EFI_INVALID_PARAMETER;
}
return MpInitLibGetNumberOfProcessors (
NumberOfProcessors,
NumberOfEnabledProcessors
);
}
/**
Gets detailed MP-related information on the requested processor at the
instant this call is made. This service may only be called from the BSP.
This service retrieves detailed MP-related information about any processor
on the platform. Note the following:
- The processor information may change during the course of a boot session.
- The information presented here is entirely MP related.
Information regarding the number of caches and their sizes, frequency of operation,
slot numbers is all considered platform-related information and is not provided
by this service.
@param[in] This A pointer to the EFI_MP_SERVICES_PROTOCOL
instance.
@param[in] ProcessorNumber The handle number of processor.
@param[out] ProcessorInfoBuffer A pointer to the buffer where information for
the requested processor is deposited.
@retval EFI_SUCCESS Processor information was returned.
@retval EFI_DEVICE_ERROR The calling processor is an AP.
@retval EFI_INVALID_PARAMETER ProcessorInfoBuffer is NULL.
@retval EFI_NOT_FOUND The processor with the handle specified by
ProcessorNumber does not exist in the platform.
**/
EFI_STATUS
EFIAPI
GetProcessorInfo (
IN EFI_MP_SERVICES_PROTOCOL *This,
IN UINTN ProcessorNumber,
OUT EFI_PROCESSOR_INFORMATION *ProcessorInfoBuffer
)
{
return MpInitLibGetProcessorInfo (ProcessorNumber, ProcessorInfoBuffer, NULL);
}
/**
This service executes a caller provided function on all enabled APs. APs can
run either simultaneously or one at a time in sequence. This service supports
both blocking and non-blocking requests. The non-blocking requests use EFI
events so the BSP can detect when the APs have finished. This service may only
be called from the BSP.
This function is used to dispatch all the enabled APs to the function specified
by Procedure. If any enabled AP is busy, then EFI_NOT_READY is returned
immediately and Procedure is not started on any AP.
If SingleThread is TRUE, all the enabled APs execute the function specified by
Procedure one by one, in ascending order of processor handle number. Otherwise,
all the enabled APs execute the function specified by Procedure simultaneously.
If WaitEvent is NULL, execution is in blocking mode. The BSP waits until all
APs finish or TimeoutInMicroseconds expires. Otherwise, execution is in non-blocking
mode, and the BSP returns from this service without waiting for APs. If a
non-blocking mode is requested after the UEFI Event EFI_EVENT_GROUP_READY_TO_BOOT
is signaled, then EFI_UNSUPPORTED must be returned.
If the timeout specified by TimeoutInMicroseconds expires before all APs return
from Procedure, then Procedure on the failed APs is terminated. All enabled APs
are always available for further calls to EFI_MP_SERVICES_PROTOCOL.StartupAllAPs()
and EFI_MP_SERVICES_PROTOCOL.StartupThisAP(). If FailedCpuList is not NULL, its
content points to the list of processor handle numbers in which Procedure was
terminated.
Note: It is the responsibility of the consumer of the EFI_MP_SERVICES_PROTOCOL.StartupAllAPs()
to make sure that the nature of the code that is executed on the BSP and the
dispatched APs is well controlled. The MP Services Protocol does not guarantee
that the Procedure function is MP-safe. Hence, the tasks that can be run in
parallel are limited to certain independent tasks and well-controlled exclusive
code. EFI services and protocols may not be called by APs unless otherwise
specified.
In blocking execution mode, BSP waits until all APs finish or
TimeoutInMicroseconds expires.
In non-blocking execution mode, BSP is freed to return to the caller and then
proceed to the next task without having to wait for APs. The following
sequence needs to occur in a non-blocking execution mode:
-# The caller that intends to use this MP Services Protocol in non-blocking
mode creates WaitEvent by calling the EFI CreateEvent() service. The caller
invokes EFI_MP_SERVICES_PROTOCOL.StartupAllAPs(). If the parameter WaitEvent
is not NULL, then StartupAllAPs() executes in non-blocking mode. It requests
the function specified by Procedure to be started on all the enabled APs,
and releases the BSP to continue with other tasks.
-# The caller can use the CheckEvent() and WaitForEvent() services to check
the state of the WaitEvent created in step 1.
-# When the APs complete their task or TimeoutInMicroSecondss expires, the MP
Service signals WaitEvent by calling the EFI SignalEvent() function. If
FailedCpuList is not NULL, its content is available when WaitEvent is
signaled. If all APs returned from Procedure prior to the timeout, then
FailedCpuList is set to NULL. If not all APs return from Procedure before
the timeout, then FailedCpuList is filled in with the list of the failed
APs. The buffer is allocated by MP Service Protocol using AllocatePool().
It is the caller's responsibility to free the buffer with FreePool() service.
-# This invocation of SignalEvent() function informs the caller that invoked
EFI_MP_SERVICES_PROTOCOL.StartupAllAPs() that either all the APs completed
the specified task or a timeout occurred. The contents of FailedCpuList
can be examined to determine which APs did not complete the specified task
prior to the timeout.
@param[in] This A pointer to the EFI_MP_SERVICES_PROTOCOL
instance.
@param[in] Procedure A pointer to the function to be run on
enabled APs of the system. See type
EFI_AP_PROCEDURE.
@param[in] SingleThread If TRUE, then all the enabled APs execute
the function specified by Procedure one by
one, in ascending order of processor handle
number. If FALSE, then all the enabled APs
execute the function specified by Procedure
simultaneously.
@param[in] WaitEvent The event created by the caller with CreateEvent()
service. If it is NULL, then execute in
blocking mode. BSP waits until all APs finish
or TimeoutInMicroseconds expires. If it's
not NULL, then execute in non-blocking mode.
BSP requests the function specified by
Procedure to be started on all the enabled
APs, and go on executing immediately. If
all return from Procedure, or TimeoutInMicroseconds
expires, this event is signaled. The BSP
can use the CheckEvent() or WaitForEvent()
services to check the state of event. Type
EFI_EVENT is defined in CreateEvent() in
the Unified Extensible Firmware Interface
Specification.
@param[in] TimeoutInMicroseconds Indicates the time limit in microseconds for
APs to return from Procedure, either for
blocking or non-blocking mode. Zero means
infinity. If the timeout expires before
all APs return from Procedure, then Procedure
on the failed APs is terminated. All enabled
APs are available for next function assigned
by EFI_MP_SERVICES_PROTOCOL.StartupAllAPs()
or EFI_MP_SERVICES_PROTOCOL.StartupThisAP().
If the timeout expires in blocking mode,
BSP returns EFI_TIMEOUT. If the timeout
expires in non-blocking mode, WaitEvent
is signaled with SignalEvent().
@param[in] ProcedureArgument The parameter passed into Procedure for
all APs.
@param[out] FailedCpuList If NULL, this parameter is ignored. Otherwise,
if all APs finish successfully, then its
content is set to NULL. If not all APs
finish before timeout expires, then its
content is set to address of the buffer
holding handle numbers of the failed APs.
The buffer is allocated by MP Service Protocol,
and it's the caller's responsibility to
free the buffer with FreePool() service.
In blocking mode, it is ready for consumption
when the call returns. In non-blocking mode,
it is ready when WaitEvent is signaled. The
list of failed CPU is terminated by
END_OF_CPU_LIST.
@retval EFI_SUCCESS In blocking mode, all APs have finished before
the timeout expired.
@retval EFI_SUCCESS In non-blocking mode, function has been dispatched
to all enabled APs.
@retval EFI_UNSUPPORTED A non-blocking mode request was made after the
UEFI event EFI_EVENT_GROUP_READY_TO_BOOT was
signaled.
@retval EFI_DEVICE_ERROR Caller processor is AP.
@retval EFI_NOT_STARTED No enabled APs exist in the system.
@retval EFI_NOT_READY Any enabled APs are busy.
@retval EFI_TIMEOUT In blocking mode, the timeout expired before
all enabled APs have finished.
@retval EFI_INVALID_PARAMETER Procedure is NULL.
**/
EFI_STATUS
EFIAPI
StartupAllAPs (
IN EFI_MP_SERVICES_PROTOCOL *This,
IN EFI_AP_PROCEDURE Procedure,
IN BOOLEAN SingleThread,
IN EFI_EVENT WaitEvent OPTIONAL,
IN UINTN TimeoutInMicroseconds,
IN VOID *ProcedureArgument OPTIONAL,
OUT UINTN **FailedCpuList OPTIONAL
)
{
return MpInitLibStartupAllAPs (
Procedure,
SingleThread,
WaitEvent,
TimeoutInMicroseconds,
ProcedureArgument,
FailedCpuList
);
}
/**
This service lets the caller get one enabled AP to execute a caller-provided
function. The caller can request the BSP to either wait for the completion
of the AP or just proceed with the next task by using the EFI event mechanism.
See EFI_MP_SERVICES_PROTOCOL.StartupAllAPs() for more details on non-blocking
execution support. This service may only be called from the BSP.
This function is used to dispatch one enabled AP to the function specified by
Procedure passing in the argument specified by ProcedureArgument. If WaitEvent
is NULL, execution is in blocking mode. The BSP waits until the AP finishes or
TimeoutInMicroSecondss expires. Otherwise, execution is in non-blocking mode.
BSP proceeds to the next task without waiting for the AP. If a non-blocking mode
is requested after the UEFI Event EFI_EVENT_GROUP_READY_TO_BOOT is signaled,
then EFI_UNSUPPORTED must be returned.
If the timeout specified by TimeoutInMicroseconds expires before the AP returns
from Procedure, then execution of Procedure by the AP is terminated. The AP is
available for subsequent calls to EFI_MP_SERVICES_PROTOCOL.StartupAllAPs() and
EFI_MP_SERVICES_PROTOCOL.StartupThisAP().
@param[in] This A pointer to the EFI_MP_SERVICES_PROTOCOL
instance.
@param[in] Procedure A pointer to the function to be run on the
designated AP of the system. See type
EFI_AP_PROCEDURE.
@param[in] ProcessorNumber The handle number of the AP. The range is
from 0 to the total number of logical
processors minus 1. The total number of
logical processors can be retrieved by
EFI_MP_SERVICES_PROTOCOL.GetNumberOfProcessors().
@param[in] WaitEvent The event created by the caller with CreateEvent()
service. If it is NULL, then execute in
blocking mode. BSP waits until this AP finish
or TimeoutInMicroSeconds expires. If it's
not NULL, then execute in non-blocking mode.
BSP requests the function specified by
Procedure to be started on this AP,
and go on executing immediately. If this AP
return from Procedure or TimeoutInMicroSeconds
expires, this event is signaled. The BSP
can use the CheckEvent() or WaitForEvent()
services to check the state of event. Type
EFI_EVENT is defined in CreateEvent() in
the Unified Extensible Firmware Interface
Specification.
@param[in] TimeoutInMicroseconds Indicates the time limit in microseconds for
this AP to finish this Procedure, either for
blocking or non-blocking mode. Zero means
infinity. If the timeout expires before
this AP returns from Procedure, then Procedure
on the AP is terminated. The
AP is available for next function assigned
by EFI_MP_SERVICES_PROTOCOL.StartupAllAPs()
or EFI_MP_SERVICES_PROTOCOL.StartupThisAP().
If the timeout expires in blocking mode,
BSP returns EFI_TIMEOUT. If the timeout
expires in non-blocking mode, WaitEvent
is signaled with SignalEvent().
@param[in] ProcedureArgument The parameter passed into Procedure on the
specified AP.
@param[out] Finished If NULL, this parameter is ignored. In
blocking mode, this parameter is ignored.
In non-blocking mode, if AP returns from
Procedure before the timeout expires, its
content is set to TRUE. Otherwise, the
value is set to FALSE. The caller can
determine if the AP returned from Procedure
by evaluating this value.
@retval EFI_SUCCESS In blocking mode, specified AP finished before
the timeout expires.
@retval EFI_SUCCESS In non-blocking mode, the function has been
dispatched to specified AP.
@retval EFI_UNSUPPORTED A non-blocking mode request was made after the
UEFI event EFI_EVENT_GROUP_READY_TO_BOOT was
signaled.
@retval EFI_DEVICE_ERROR The calling processor is an AP.
@retval EFI_TIMEOUT In blocking mode, the timeout expired before
the specified AP has finished.
@retval EFI_NOT_READY The specified AP is busy.
@retval EFI_NOT_FOUND The processor with the handle specified by
ProcessorNumber does not exist.
@retval EFI_INVALID_PARAMETER ProcessorNumber specifies the BSP or disabled AP.
@retval EFI_INVALID_PARAMETER Procedure is NULL.
**/
EFI_STATUS
EFIAPI
StartupThisAP (
IN EFI_MP_SERVICES_PROTOCOL *This,
IN EFI_AP_PROCEDURE Procedure,
IN UINTN ProcessorNumber,
IN EFI_EVENT WaitEvent OPTIONAL,
IN UINTN TimeoutInMicroseconds,
IN VOID *ProcedureArgument OPTIONAL,
OUT BOOLEAN *Finished OPTIONAL
)
{
return MpInitLibStartupThisAP (
Procedure,
ProcessorNumber,
WaitEvent,
TimeoutInMicroseconds,
ProcedureArgument,
Finished
);
}
/**
This service switches the requested AP to be the BSP from that point onward.
This service changes the BSP for all purposes. This call can only be performed
by the current BSP.
This service switches the requested AP to be the BSP from that point onward.
This service changes the BSP for all purposes. The new BSP can take over the
execution of the old BSP and continue seamlessly from where the old one left
off. This service may not be supported after the UEFI Event EFI_EVENT_GROUP_READY_TO_BOOT
is signaled.
If the BSP cannot be switched prior to the return from this service, then
EFI_UNSUPPORTED must be returned.
@param[in] This A pointer to the EFI_MP_SERVICES_PROTOCOL instance.
@param[in] ProcessorNumber The handle number of AP that is to become the new
BSP. The range is from 0 to the total number of
logical processors minus 1. The total number of
logical processors can be retrieved by
EFI_MP_SERVICES_PROTOCOL.GetNumberOfProcessors().
@param[in] EnableOldBSP If TRUE, then the old BSP will be listed as an
enabled AP. Otherwise, it will be disabled.
@retval EFI_SUCCESS BSP successfully switched.
@retval EFI_UNSUPPORTED Switching the BSP cannot be completed prior to
this service returning.
@retval EFI_UNSUPPORTED Switching the BSP is not supported.
@retval EFI_DEVICE_ERROR The calling processor is an AP.
@retval EFI_NOT_FOUND The processor with the handle specified by
ProcessorNumber does not exist.
@retval EFI_INVALID_PARAMETER ProcessorNumber specifies the current BSP or
a disabled AP.
@retval EFI_NOT_READY The specified AP is busy.
**/
EFI_STATUS
EFIAPI
SwitchBSP (
IN EFI_MP_SERVICES_PROTOCOL *This,
IN UINTN ProcessorNumber,
IN BOOLEAN EnableOldBSP
)
{
return MpInitLibSwitchBSP (ProcessorNumber, EnableOldBSP);
}
/**
This service lets the caller enable or disable an AP from this point onward.
This service may only be called from the BSP.
This service allows the caller enable or disable an AP from this point onward.
The caller can optionally specify the health status of the AP by Health. If
an AP is being disabled, then the state of the disabled AP is implementation
dependent. If an AP is enabled, then the implementation must guarantee that a
complete initialization sequence is performed on the AP, so the AP is in a state
that is compatible with an MP operating system. This service may not be supported
after the UEFI Event EFI_EVENT_GROUP_READY_TO_BOOT is signaled.
If the enable or disable AP operation cannot be completed prior to the return
from this service, then EFI_UNSUPPORTED must be returned.
@param[in] This A pointer to the EFI_MP_SERVICES_PROTOCOL instance.
@param[in] ProcessorNumber The handle number of AP.
The range is from 0 to the total number of
logical processors minus 1. The total number of
logical processors can be retrieved by
EFI_MP_SERVICES_PROTOCOL.GetNumberOfProcessors().
@param[in] EnableAP Specifies the new state for the processor for
enabled, FALSE for disabled.
@param[in] HealthFlag If not NULL, a pointer to a value that specifies
the new health status of the AP. This flag
corresponds to StatusFlag defined in
EFI_MP_SERVICES_PROTOCOL.GetProcessorInfo(). Only
the PROCESSOR_HEALTH_STATUS_BIT is used. All other
bits are ignored. If it is NULL, this parameter
is ignored.
@retval EFI_SUCCESS The specified AP was enabled or disabled successfully.
@retval EFI_UNSUPPORTED Enabling or disabling an AP cannot be completed
prior to this service returning.
@retval EFI_UNSUPPORTED Enabling or disabling an AP is not supported.
@retval EFI_DEVICE_ERROR The calling processor is an AP.
@retval EFI_NOT_FOUND Processor with the handle specified by ProcessorNumber
does not exist.
@retval EFI_INVALID_PARAMETER ProcessorNumber specifies the BSP.
**/
EFI_STATUS
EFIAPI
EnableDisableAP (
IN EFI_MP_SERVICES_PROTOCOL *This,
IN UINTN ProcessorNumber,
IN BOOLEAN EnableAP,
IN UINT32 *HealthFlag OPTIONAL
)
{
return MpInitLibEnableDisableAP (ProcessorNumber, EnableAP, HealthFlag);
}
/**
This return the handle number for the calling processor. This service may be
called from the BSP and APs.
This service returns the processor handle number for the calling processor.
The returned value is in the range from 0 to the total number of logical
processors minus 1. The total number of logical processors can be retrieved
with EFI_MP_SERVICES_PROTOCOL.GetNumberOfProcessors(). This service may be
called from the BSP and APs. If ProcessorNumber is NULL, then EFI_INVALID_PARAMETER
is returned. Otherwise, the current processors handle number is returned in
ProcessorNumber, and EFI_SUCCESS is returned.
@param[in] This A pointer to the EFI_MP_SERVICES_PROTOCOL instance.
@param[out] ProcessorNumber Pointer to the handle number of AP.
The range is from 0 to the total number of
logical processors minus 1. The total number of
logical processors can be retrieved by
EFI_MP_SERVICES_PROTOCOL.GetNumberOfProcessors().
@retval EFI_SUCCESS The current processor handle number was returned
in ProcessorNumber.
@retval EFI_INVALID_PARAMETER ProcessorNumber is NULL.
**/
EFI_STATUS
EFIAPI
WhoAmI (
IN EFI_MP_SERVICES_PROTOCOL *This,
OUT UINTN *ProcessorNumber
)
{
return MpInitLibWhoAmI (ProcessorNumber);
}
/**
Initialize Multi-processor support.
**/
VOID
InitializeMpSupport (
VOID
)
{
EFI_STATUS Status;
UINTN NumberOfProcessors;
UINTN NumberOfEnabledProcessors;
//
// Wakeup APs to do initialization
//
Status = MpInitLibInitialize ();
ASSERT_EFI_ERROR (Status);
MpInitLibGetNumberOfProcessors (&NumberOfProcessors, &NumberOfEnabledProcessors);
mNumberOfProcessors = NumberOfProcessors;
DEBUG ((DEBUG_INFO, "Detect CPU count: %d\n", mNumberOfProcessors));
Status = gBS->InstallMultipleProtocolInterfaces (
&mMpServiceHandle,
&gEfiMpServiceProtocolGuid,
&mMpServicesTemplate,
NULL
);
ASSERT_EFI_ERROR (Status);
}

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/** @file Exception.c
CPU DXE Module initialization exception instance.
Copyright (c) 2024, Loongson Technology Corporation Limited. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include "CpuDxe.h"
#include <Guid/VectorHandoffTable.h>
#include <Library/CpuExceptionHandlerLib.h>
#include <Register/LoongArch64/Csr.h>
VOID
ExceptionEntryStart (
VOID
);
VOID
ExceptionEntryEnd (
VOID
);
/**
This function registers and enables the handler specified by InterruptHandler for a processor
interrupt or exception type specified by InterruptType. If InterruptHandler is NULL, then the
handler for the processor interrupt or exception type specified by InterruptType is uninstalled.
The installed handler is called once for each processor interrupt or exception.
@param InterruptType A pointer to the processor's current interrupt state. Set to TRUE if interrupts
are enabled and FALSE if interrupts are disabled.
@param InterruptHandler A pointer to a function of type EFI_CPU_INTERRUPT_HANDLER that is called
when a processor interrupt occurs. If this parameter is NULL, then the handler
will be uninstalled.
@retval EFI_SUCCESS The handler for the processor interrupt was successfully installed or uninstalled.
@retval EFI_ALREADY_STARTED InterruptHandler is not NULL, and a handler for InterruptType was
previously installed.
@retval EFI_INVALID_PARAMETER InterruptHandler is NULL, and a handler for InterruptType was not
previously installed.
@retval EFI_UNSUPPORTED The interrupt specified by InterruptType is not supported.
**/
EFI_STATUS
RegisterInterruptHandler (
IN EFI_EXCEPTION_TYPE InterruptType,
IN EFI_CPU_INTERRUPT_HANDLER InterruptHandler
)
{
return (EFI_STATUS)RegisterCpuInterruptHandler (InterruptType, InterruptHandler);
}
/**
Update the exception start entry code.
@retval EFI_SUCCESS Update the exception start entry code down.
@retval EFI_OUT_OF_RESOURCES The start entry code size out of bounds.
**/
EFI_STATUS
EFIAPI
UpdateExceptionStartEntry (
VOID
)
{
EFI_PHYSICAL_ADDRESS ExceptionStartEntry;
UINTN VectorLength;
UINTN MaxLength;
UINTN MaxSizeOfVector;
VectorLength = (UINTN)ExceptionEntryEnd - (UINTN)ExceptionEntryStart;
//
// A vector is up to 512 bytes.
//
MaxSizeOfVector = 512;
MaxLength = (MAX_LOONGARCH_EXCEPTION + MAX_LOONGARCH_INTERRUPT) * MaxSizeOfVector;
if (VectorLength > MaxLength) {
return EFI_OUT_OF_RESOURCES;
}
ExceptionStartEntry = PcdGet64 (PcdLoongArchExceptionVectorBaseAddress);
InvalidateInstructionCacheRange ((VOID *)ExceptionStartEntry, VectorLength);
CopyMem ((VOID *)ExceptionStartEntry, (VOID *)ExceptionEntryStart, VectorLength);
InvalidateInstructionCacheRange ((VOID *)ExceptionStartEntry, VectorLength);
InvalidateDataCache ();
//
// If PcdLoongArchExceptionVectorBaseAddress is not used during SEC and PEI stages, the exception
// base addres is set to PcdLoongArchExceptionVectorBaseAddress.
//
if (CsrRead (LOONGARCH_CSR_EBASE) != ExceptionStartEntry) {
SetExceptionBaseAddress (ExceptionStartEntry);
}
return EFI_SUCCESS;
}
/**
Initialize interrupt handling for DXE phase.
@param Cpu A pointer of EFI_CPU_ARCH_PROTOCOL instance.
@return VOID.
**/
VOID
InitializeExceptions (
IN EFI_CPU_ARCH_PROTOCOL *Cpu
)
{
EFI_STATUS Status;
EFI_VECTOR_HANDOFF_INFO *VectorInfoList;
EFI_VECTOR_HANDOFF_INFO *VectorInfo;
BOOLEAN IrqEnabled;
VectorInfo = (EFI_VECTOR_HANDOFF_INFO *)NULL;
Status = EfiGetSystemConfigurationTable (&gEfiVectorHandoffTableGuid, (VOID **)&VectorInfoList);
if ((Status == EFI_SUCCESS) && (VectorInfoList != NULL)) {
VectorInfo = VectorInfoList;
}
//
// Disable interrupts
//
Cpu->GetInterruptState (Cpu, &IrqEnabled);
if (IrqEnabled) {
Cpu->DisableInterrupt (Cpu);
}
//
// Update the Exception Start Entry code to point into CpuDxe.
//
Status = UpdateExceptionStartEntry ();
if (EFI_ERROR (Status)) {
DebugPrint (EFI_D_ERROR, "[%a]: Exception start entry code out of bounds!\n", __func__);
ASSERT_EFI_ERROR (Status);
}
//
// Intialize the CpuExceptionHandlerLib so we take over the exception vector table from the DXE Core
//
Status = InitializeCpuExceptionHandlers (VectorInfo);
ASSERT_EFI_ERROR (Status);
//
// Enable interrupts
//
DebugPrint (EFI_D_INFO, "InitializeExceptions,IrqEnabled = %x\n", IrqEnabled);
if (!IrqEnabled) {
Status = Cpu->EnableInterrupt (Cpu);
}
ASSERT_EFI_ERROR (Status);
}