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Diffstat (limited to 'roms/ipxe/src/include/ipxe/efi/Protocol/Cpu.h')
| -rw-r--r-- | roms/ipxe/src/include/ipxe/efi/Protocol/Cpu.h | 302 |
1 files changed, 302 insertions, 0 deletions
diff --git a/roms/ipxe/src/include/ipxe/efi/Protocol/Cpu.h b/roms/ipxe/src/include/ipxe/efi/Protocol/Cpu.h new file mode 100644 index 000000000..665924e88 --- /dev/null +++ b/roms/ipxe/src/include/ipxe/efi/Protocol/Cpu.h @@ -0,0 +1,302 @@ +/** @file + CPU Architectural Protocol as defined in PI spec Volume 2 DXE + + This code abstracts the DXE core from processor implementation details. + + Copyright (c) 2006 - 2011, 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. + +**/ + +#ifndef __ARCH_PROTOCOL_CPU_H__ +#define __ARCH_PROTOCOL_CPU_H__ + +FILE_LICENCE ( BSD3 ); + +#include <ipxe/efi/Protocol/DebugSupport.h> + +#define EFI_CPU_ARCH_PROTOCOL_GUID \ + { 0x26baccb1, 0x6f42, 0x11d4, {0xbc, 0xe7, 0x0, 0x80, 0xc7, 0x3c, 0x88, 0x81 } } + +typedef struct _EFI_CPU_ARCH_PROTOCOL EFI_CPU_ARCH_PROTOCOL; + +/// +/// The type of flush operation +/// +typedef enum { + EfiCpuFlushTypeWriteBackInvalidate, + EfiCpuFlushTypeWriteBack, + EfiCpuFlushTypeInvalidate, + EfiCpuMaxFlushType +} EFI_CPU_FLUSH_TYPE; + +/// +/// The type of processor INIT. +/// +typedef enum { + EfiCpuInit, + EfiCpuMaxInitType +} EFI_CPU_INIT_TYPE; + +/** + EFI_CPU_INTERRUPT_HANDLER that is called when a processor interrupt occurs. + + @param InterruptType Defines the type of interrupt or exception that + occurred on the processor.This parameter is processor architecture specific. + @param SystemContext A pointer to the processor context when + the interrupt occurred on the processor. + + @return None + +**/ +typedef +VOID +(EFIAPI *EFI_CPU_INTERRUPT_HANDLER)( + IN CONST EFI_EXCEPTION_TYPE InterruptType, + IN CONST EFI_SYSTEM_CONTEXT SystemContext + ); + +/** + 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. + +**/ +typedef +EFI_STATUS +(EFIAPI *EFI_CPU_FLUSH_DATA_CACHE)( + 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. + +**/ +typedef +EFI_STATUS +(EFIAPI *EFI_CPU_ENABLE_INTERRUPT)( + 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. + +**/ +typedef +EFI_STATUS +(EFIAPI *EFI_CPU_DISABLE_INTERRUPT)( + 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. + +**/ +typedef +EFI_STATUS +(EFIAPI *EFI_CPU_GET_INTERRUPT_STATE)( + 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. + +**/ +typedef +EFI_STATUS +(EFIAPI *EFI_CPU_INIT)( + IN EFI_CPU_ARCH_PROTOCOL *This, + IN EFI_CPU_INIT_TYPE InitType + ); + + +/** + 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 This The EFI_CPU_ARCH_PROTOCOL instance. + @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. + +**/ +typedef +EFI_STATUS +(EFIAPI *EFI_CPU_REGISTER_INTERRUPT_HANDLER)( + IN EFI_CPU_ARCH_PROTOCOL *This, + IN EFI_EXCEPTION_TYPE InterruptType, + IN EFI_CPU_INTERRUPT_HANDLER InterruptHandler + ); + + +/** + This function reads the processor timer specified by TimerIndex and returns it in TimerValue. + + @param This The EFI_CPU_ARCH_PROTOCOL instance. + @param TimerIndex Specifies which processor timer is to be returned in TimerValue. This parameter + must be between 0 and NumberOfTimers-1. + @param TimerValue Pointer to the returned timer value. + @param TimerPeriod A pointer to the amount of time that passes in femtoseconds for each increment + of TimerValue. If TimerValue does not increment at a predictable rate, then 0 is + returned. This parameter is optional and may be NULL. + + @retval EFI_SUCCESS The processor timer value specified by TimerIndex was returned in TimerValue. + @retval EFI_DEVICE_ERROR An error occurred attempting to read one of the processor's timers. + @retval EFI_INVALID_PARAMETER TimerValue is NULL or TimerIndex is not valid. + @retval EFI_UNSUPPORTED The processor does not have any readable timers. + +**/ +typedef +EFI_STATUS +(EFIAPI *EFI_CPU_GET_TIMER_VALUE)( + IN EFI_CPU_ARCH_PROTOCOL *This, + IN UINT32 TimerIndex, + OUT UINT64 *TimerValue, + OUT UINT64 *TimerPeriod OPTIONAL + ); + + +/** + 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. + Attributes specified an illegal combination of attributes that + cannot be set together. + @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. + +**/ +typedef +EFI_STATUS +(EFIAPI *EFI_CPU_SET_MEMORY_ATTRIBUTES)( + IN EFI_CPU_ARCH_PROTOCOL *This, + IN EFI_PHYSICAL_ADDRESS BaseAddress, + IN UINT64 Length, + IN UINT64 Attributes + ); + + +/// +/// The EFI_CPU_ARCH_PROTOCOL is used to abstract processor-specific functions from the DXE +/// Foundation. This includes flushing caches, enabling and disabling interrupts, hooking interrupt +/// vectors and exception vectors, reading internal processor timers, resetting the processor, and +/// determining the processor frequency. +/// +struct _EFI_CPU_ARCH_PROTOCOL { + EFI_CPU_FLUSH_DATA_CACHE FlushDataCache; + EFI_CPU_ENABLE_INTERRUPT EnableInterrupt; + EFI_CPU_DISABLE_INTERRUPT DisableInterrupt; + EFI_CPU_GET_INTERRUPT_STATE GetInterruptState; + EFI_CPU_INIT Init; + EFI_CPU_REGISTER_INTERRUPT_HANDLER RegisterInterruptHandler; + EFI_CPU_GET_TIMER_VALUE GetTimerValue; + EFI_CPU_SET_MEMORY_ATTRIBUTES SetMemoryAttributes; + /// + /// The number of timers that are available in a processor. The value in this + /// field is a constant that must not be modified after the CPU Architectural + /// Protocol is installed. All consumers must treat this as a read-only field. + /// + UINT32 NumberOfTimers; + /// + /// The size, in bytes, of the alignment required for DMA buffer allocations. + /// This is typically the size of the largest data cache line in the platform. + /// The value in this field is a constant that must not be modified after the + /// CPU Architectural Protocol is installed. All consumers must treat this as + /// a read-only field. + /// + UINT32 DmaBufferAlignment; +}; + +extern EFI_GUID gEfiCpuArchProtocolGuid; + +#endif |