Adding support for BeagleBoard.
ArmPkg - Supoprt for ARM specific things that can change as the architecture changes. Plus semihosting JTAG drivers. EmbeddedPkg - Generic support for an embeddded platform. Including a light weight command line shell. BeagleBoardPkg - Platform specifics for BeagleBoard. SD Card works, but USB has issues. Looks like a bug in the open source USB stack (Our internal stack works fine). git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9518 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
AJFISH
238
ArmPkg/Drivers/CpuDxe/Exception.c
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238
ArmPkg/Drivers/CpuDxe/Exception.c
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/** @file
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Copyright (c) 2008-2009, Apple Inc. All rights reserved.
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All rights reserved. This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include "CpuDxe.h"
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#include <Library/CacheMaintenanceLib.h>
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VOID
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ExceptionHandlersStart (
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VOID
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);
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VOID
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ExceptionHandlersEnd (
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VOID
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);
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VOID
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CommonExceptionEntry (
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VOID
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);
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VOID
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AsmCommonExceptionEntry (
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VOID
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);
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EFI_EXCEPTION_CALLBACK gExceptionHandlers[MAX_ARM_EXCEPTION + 1];
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EFI_EXCEPTION_CALLBACK gDebuggerExceptionHandlers[MAX_ARM_EXCEPTION + 1];
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/**
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This function registers and enables the handler specified by InterruptHandler for a processor
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interrupt or exception type specified by InterruptType. If InterruptHandler is NULL, then the
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handler for the processor interrupt or exception type specified by InterruptType is uninstalled.
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The installed handler is called once for each processor interrupt or exception.
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@param InterruptType A pointer to the processor's current interrupt state. Set to TRUE if interrupts
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are enabled and FALSE if interrupts are disabled.
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@param InterruptHandler A pointer to a function of type EFI_CPU_INTERRUPT_HANDLER that is called
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when a processor interrupt occurs. If this parameter is NULL, then the handler
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will be uninstalled.
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@retval EFI_SUCCESS The handler for the processor interrupt was successfully installed or uninstalled.
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@retval EFI_ALREADY_STARTED InterruptHandler is not NULL, and a handler for InterruptType was
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previously installed.
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@retval EFI_INVALID_PARAMETER InterruptHandler is NULL, and a handler for InterruptType was not
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previously installed.
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@retval EFI_UNSUPPORTED The interrupt specified by InterruptType is not supported.
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**/
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EFI_STATUS
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RegisterInterruptHandler (
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IN EFI_EXCEPTION_TYPE InterruptType,
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IN EFI_CPU_INTERRUPT_HANDLER InterruptHandler
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)
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{
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if (InterruptType > MAX_ARM_EXCEPTION) {
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return EFI_UNSUPPORTED;
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}
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if ((InterruptHandler != NULL) && (gExceptionHandlers[InterruptType] != NULL)) {
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return EFI_ALREADY_STARTED;
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}
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gExceptionHandlers[InterruptType] = InterruptHandler;
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return EFI_SUCCESS;
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}
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/**
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This function registers and enables the handler specified by InterruptHandler for a processor
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interrupt or exception type specified by InterruptType. If InterruptHandler is NULL, then the
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handler for the processor interrupt or exception type specified by InterruptType is uninstalled.
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The installed handler is called once for each processor interrupt or exception.
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@param InterruptType A pointer to the processor's current interrupt state. Set to TRUE if interrupts
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are enabled and FALSE if interrupts are disabled.
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@param InterruptHandler A pointer to a function of type EFI_CPU_INTERRUPT_HANDLER that is called
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when a processor interrupt occurs. If this parameter is NULL, then the handler
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will be uninstalled.
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@retval EFI_SUCCESS The handler for the processor interrupt was successfully installed or uninstalled.
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@retval EFI_ALREADY_STARTED InterruptHandler is not NULL, and a handler for InterruptType was
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previously installed.
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@retval EFI_INVALID_PARAMETER InterruptHandler is NULL, and a handler for InterruptType was not
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previously installed.
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@retval EFI_UNSUPPORTED The interrupt specified by InterruptType is not supported.
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**/
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EFI_STATUS
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RegisterDebuggerInterruptHandler (
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IN EFI_EXCEPTION_TYPE InterruptType,
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IN EFI_CPU_INTERRUPT_HANDLER InterruptHandler
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)
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{
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if (InterruptType > MAX_ARM_EXCEPTION) {
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return EFI_UNSUPPORTED;
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}
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if ((InterruptHandler != NULL) && (gDebuggerExceptionHandlers[InterruptType] != NULL)) {
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return EFI_ALREADY_STARTED;
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}
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gDebuggerExceptionHandlers[InterruptType] = InterruptHandler;
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return EFI_SUCCESS;
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}
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VOID
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EFIAPI
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CommonCExceptionHandler (
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IN EFI_EXCEPTION_TYPE ExceptionType,
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IN OUT EFI_SYSTEM_CONTEXT SystemContext
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)
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{
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BOOLEAN Dispatched = FALSE;
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if (ExceptionType <= MAX_ARM_EXCEPTION) {
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if (gDebuggerExceptionHandlers[ExceptionType]) {
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//
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// If DebugSupport hooked the interrupt call the handler. This does not disable
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// the normal handler.
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//
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gDebuggerExceptionHandlers[ExceptionType] (ExceptionType, SystemContext);
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Dispatched = TRUE;
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}
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if (gExceptionHandlers[ExceptionType]) {
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gExceptionHandlers[ExceptionType] (ExceptionType, SystemContext);
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Dispatched = TRUE;
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}
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}
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if (Dispatched) {
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//
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// We did work so this was an expected ExceptionType
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//
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return;
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}
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if (ExceptionType == EXCEPT_ARM_SOFTWARE_INTERRUPT) {
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//
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// ARM JTAG debuggers some times use this vector, so it is not an error to get one
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//
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return;
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}
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//
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// Code after here is the default exception handler...
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//
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DEBUG ((EFI_D_ERROR, "Exception %d from %08x\n", ExceptionType, SystemContext.SystemContextArm->PC));
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ASSERT (FALSE);
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}
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EFI_STATUS
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InitializeExceptions (
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IN EFI_CPU_ARCH_PROTOCOL *Cpu
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)
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{
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EFI_STATUS Status;
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UINTN Offset;
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UINTN Length;
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UINTN Index;
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BOOLEAN Enabled;
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EFI_PHYSICAL_ADDRESS Base;
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//
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// Disable interrupts
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//
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Cpu->GetInterruptState (Cpu, &Enabled);
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Cpu->DisableInterrupt (Cpu);
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//
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// Initialize the C entry points for interrupts
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//
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for (Index = 0; Index <= MAX_ARM_EXCEPTION; Index++) {
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Status = RegisterInterruptHandler (Index, NULL);
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ASSERT_EFI_ERROR (Status);
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Status = RegisterDebuggerInterruptHandler (Index, NULL);
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ASSERT_EFI_ERROR (Status);
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}
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//
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// Copy an implementation of the ARM exception vectors to 0x0.
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//
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Length = (UINTN)ExceptionHandlersEnd - (UINTN)ExceptionHandlersStart;
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//
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// Reserve space for the exception handlers
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//
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Base = (EFI_PHYSICAL_ADDRESS)PcdGet32 (PcdCpuVectorBaseAddress);
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Status = gBS->AllocatePages (AllocateAddress, EfiBootServicesCode, EFI_SIZE_TO_PAGES (Length), &Base);
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// If the request was for memory that's not in the memory map (which is often the case for 0x00000000
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// on embedded systems, for example, we don't want to hang up. So we'll check here for a status of
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// EFI_NOT_FOUND, and continue in that case.
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if (EFI_ERROR(Status) && (Status != EFI_NOT_FOUND)) {
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ASSERT_EFI_ERROR (Status);
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}
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CopyMem ((VOID *)(UINTN)PcdGet32 (PcdCpuVectorBaseAddress), (VOID *)ExceptionHandlersStart, Length);
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//
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// Patch in the common Assembly exception handler
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//
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Offset = (UINTN)CommonExceptionEntry - (UINTN)ExceptionHandlersStart;
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*(UINTN *) ((UINT8 *)(UINTN)PcdGet32 (PcdCpuVectorBaseAddress) + Offset) = (UINTN)AsmCommonExceptionEntry;
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// Flush Caches since we updated executable stuff
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InvalidateInstructionCacheRange((VOID *)PcdGet32(PcdCpuVectorBaseAddress), Length);
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if (Enabled) {
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//
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// Restore interrupt state
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//
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Status = Cpu->EnableInterrupt (Cpu);
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}
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return Status;
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}
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