+++ /dev/null
-/** @file\r
-\r
- Copyright (c) 2008-2009, Apple Inc. All rights reserved.\r
- \r
- All rights reserved. This program and the accompanying materials\r
- are licensed and made available under the terms and conditions of the BSD License\r
- which accompanies this distribution. The full text of the license may be found at\r
- http://opensource.org/licenses/bsd-license.php\r
-\r
- THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
- WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
-\r
-**/\r
- \r
-#include <CpuDxe.h>\r
-#include <Library/CacheMaintenanceLib.h>\r
-\r
-VOID\r
-ExceptionHandlersStart (\r
- VOID\r
- );\r
-\r
-VOID\r
-ExceptionHandlersEnd (\r
- VOID\r
- );\r
-\r
-VOID\r
-CommonExceptionEntry (\r
- VOID\r
- );\r
-\r
-VOID\r
-AsmCommonExceptionEntry (\r
- VOID\r
- );\r
-\r
-\r
-EFI_EXCEPTION_CALLBACK gExceptionHandlers[MAX_ARM_EXCEPTION + 1];\r
-\r
-\r
-/**\r
- This function registers and enables the handler specified by InterruptHandler for a processor \r
- interrupt or exception type specified by InterruptType. If InterruptHandler is NULL, then the \r
- handler for the processor interrupt or exception type specified by InterruptType is uninstalled. \r
- The installed handler is called once for each processor interrupt or exception.\r
-\r
- @param InterruptType A pointer to the processor's current interrupt state. Set to TRUE if interrupts\r
- are enabled and FALSE if interrupts are disabled.\r
- @param InterruptHandler A pointer to a function of type EFI_CPU_INTERRUPT_HANDLER that is called\r
- when a processor interrupt occurs. If this parameter is NULL, then the handler\r
- will be uninstalled.\r
-\r
- @retval EFI_SUCCESS The handler for the processor interrupt was successfully installed or uninstalled.\r
- @retval EFI_ALREADY_STARTED InterruptHandler is not NULL, and a handler for InterruptType was\r
- previously installed.\r
- @retval EFI_INVALID_PARAMETER InterruptHandler is NULL, and a handler for InterruptType was not\r
- previously installed.\r
- @retval EFI_UNSUPPORTED The interrupt specified by InterruptType is not supported.\r
-\r
-**/\r
-EFI_STATUS\r
-RegisterInterruptHandler (\r
- IN EFI_EXCEPTION_TYPE InterruptType,\r
- IN EFI_CPU_INTERRUPT_HANDLER InterruptHandler\r
- )\r
-{\r
- if (InterruptType > MAX_ARM_EXCEPTION) {\r
- return EFI_UNSUPPORTED;\r
- }\r
-\r
- if ((InterruptHandler == NULL) && (gExceptionHandlers[InterruptType] == NULL)) {\r
- return EFI_INVALID_PARAMETER;\r
- }\r
-\r
- if ((InterruptHandler != NULL) && (gExceptionHandlers[InterruptType] != NULL)) {\r
- return EFI_ALREADY_STARTED;\r
- }\r
-\r
- gExceptionHandlers[InterruptType] = InterruptHandler;\r
-\r
- return EFI_SUCCESS;\r
-}\r
-\r
-\r
-\r
-\r
-VOID\r
-EFIAPI\r
-DefaultSWIExceptionHandler(\r
- IN EFI_EXCEPTION_TYPE ExceptionType,\r
- IN OUT EFI_SYSTEM_CONTEXT SystemContext\r
- )\r
-{\r
- return;\r
-}\r
-\r
-\r
-VOID\r
-EFIAPI\r
-DefaultExceptionHandler(\r
- IN EFI_EXCEPTION_TYPE ExceptionType,\r
- IN OUT EFI_SYSTEM_CONTEXT SystemContext\r
- )\r
-{\r
- DEBUG ((EFI_D_ERROR, "Exception %d from %x\n", ExceptionType, SystemContext.SystemContextArm->PC));\r
- ASSERT (FALSE);\r
-\r
- return;\r
-}\r
-\r
-\r
-\r
-EFI_STATUS\r
-InitializeExceptions (\r
- IN EFI_CPU_ARCH_PROTOCOL *Cpu\r
- )\r
-{\r
- EFI_STATUS Status = EFI_SUCCESS;\r
- UINTN Offset;\r
- UINTN Length;\r
- UINTN Index;\r
- BOOLEAN Enabled;\r
-\r
- //\r
- // Disable interrupts\r
- //\r
- Cpu->GetInterruptState (Cpu, &Enabled);\r
- Cpu->DisableInterrupt (Cpu);\r
-\r
- //\r
- // Initialize the C entry points for interrupts\r
- //\r
- for (Index = 0; Index <= MAX_ARM_EXCEPTION; Index++) {\r
- if (Index == EXCEPT_ARM_SOFTWARE_INTERRUPT) {\r
- Status = Cpu->RegisterInterruptHandler (Cpu, Index, DefaultSWIExceptionHandler);\r
- } else {\r
- Status = Cpu->RegisterInterruptHandler (Cpu, Index, DefaultExceptionHandler);\r
- }\r
- ASSERT_EFI_ERROR (Status);\r
- }\r
-\r
- //\r
- // Copy an implementation of the ARM exception vectors to 0x0.\r
- //\r
- Length = (UINTN)ExceptionHandlersEnd - (UINTN)ExceptionHandlersStart;\r
-\r
- CopyMem ((VOID *)(UINTN)PcdGet32 (PcdCpuVectorBaseAddress), (VOID *)ExceptionHandlersStart, Length);\r
-\r
- //\r
- // Patch in the common Assembly exception handler\r
- //\r
- Offset = (UINTN)CommonExceptionEntry - (UINTN)ExceptionHandlersStart;\r
- *(UINTN *) ((UINT8 *)(UINTN)PcdGet32 (PcdCpuVectorBaseAddress) + Offset) = (UINTN)AsmCommonExceptionEntry;\r
-\r
- //\r
- // Flush Caches since we updated executable stuff\r
- //\r
- InvalidateInstructionCache ();\r
-\r
- if (Enabled) {\r
- // \r
- // Restore interrupt state\r
- //\r
- Status = Cpu->EnableInterrupt (Cpu);\r
- }\r
-\r
- return Status;\r
-}\r
-\r
-\r
-\r
-/**\r
- This function reads the processor timer specified by TimerIndex and returns it in TimerValue.\r
-\r
- @param TimerIndex Specifies which processor timer is to be returned in TimerValue. This parameter\r
- must be between 0 and NumberOfTimers-1.\r
- @param TimerValue Pointer to the returned timer value.\r
- @param TimerPeriod A pointer to the amount of time that passes in femtoseconds for each increment\r
- of TimerValue.\r
-\r
- @retval EFI_SUCCESS The processor timer value specified by TimerIndex was returned in TimerValue.\r
- @retval EFI_DEVICE_ERROR An error occurred attempting to read one of the processor's timers.\r
- @retval EFI_INVALID_PARAMETER TimerValue is NULL or TimerIndex is not valid.\r
- @retval EFI_UNSUPPORTED The processor does not have any readable timers.\r
-\r
-**/\r
-EFI_STATUS\r
-EFIAPI\r
-GetTimerValue (\r
- IN UINT32 TimerIndex,\r
- OUT UINT64 *TimerValue,\r
- OUT UINT64 *TimerPeriod OPTIONAL\r
- )\r
-{\r
- return EFI_UNSUPPORTED;\r
-}\r
-\r
-\r
-/**\r
- This function flushes the range of addresses from Start to Start+Length \r
- from the processor's data cache. If Start is not aligned to a cache line \r
- boundary, then the bytes before Start to the preceding cache line boundary \r
- are also flushed. If Start+Length is not aligned to a cache line boundary, \r
- then the bytes past Start+Length to the end of the next cache line boundary \r
- are also flushed. The FlushType of EfiCpuFlushTypeWriteBackInvalidate must be \r
- supported. If the data cache is fully coherent with all DMA operations, then \r
- this function can just return EFI_SUCCESS. If the processor does not support \r
- flushing a range of the data cache, then the entire data cache can be flushed.\r
-\r
- @param Start The beginning physical address to flush from the processor's data\r
- cache.\r
- @param Length The number of bytes to flush from the processor's data cache. This\r
- function may flush more bytes than Length specifies depending upon\r
- the granularity of the flush operation that the processor supports.\r
- @param FlushType Specifies the type of flush operation to perform.\r
-\r
- @retval EFI_SUCCESS The address range from Start to Start+Length was flushed from\r
- the processor's data cache.\r
- @retval EFI_UNSUPPORTED The processor does not support the cache flush type specified\r
- by FlushType.\r
- @retval EFI_DEVICE_ERROR The address range from Start to Start+Length could not be flushed\r
- from the processor's data cache.\r
-\r
-**/\r
-EFI_STATUS\r
-EFIAPI\r
-FlushCpuDataCache (\r
- IN EFI_PHYSICAL_ADDRESS Start,\r
- IN UINT64 Length,\r
- IN EFI_CPU_FLUSH_TYPE FlushType\r
- )\r
-{\r
- if (FlushType == EfiCpuFlushTypeWriteBackInvalidate) {\r
- WriteBackInvalidateDataCacheRange((VOID *)(UINTN)Start, (UINTN)Length);\r
- return EFI_SUCCESS;\r
- } else if (FlushType == EfiCpuFlushTypeInvalidate) {\r
- InvalidateDataCacheRange((VOID *)(UINTN)Start, (UINTN)Length);\r
- return EFI_SUCCESS;\r
- } else if (FlushType == EfiCpuFlushTypeWriteBack) {\r
- WriteBackDataCacheRange((VOID *)(UINTN)Start, (UINTN)Length);\r
- return EFI_SUCCESS;\r
- } else {\r
- return EFI_UNSUPPORTED;\r
- }\r
-}\r
-\r
-\r
-\r
-\r
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