diff options
Diffstat (limited to 'ArmPkg/Drivers/CpuDxe/CpuDxe.c')
| -rw-r--r-- | ArmPkg/Drivers/CpuDxe/CpuDxe.c | 113 |
1 files changed, 100 insertions, 13 deletions
diff --git a/ArmPkg/Drivers/CpuDxe/CpuDxe.c b/ArmPkg/Drivers/CpuDxe/CpuDxe.c index d3f0ff5..a4ac97c 100644 --- a/ArmPkg/Drivers/CpuDxe/CpuDxe.c +++ b/ArmPkg/Drivers/CpuDxe/CpuDxe.c @@ -16,6 +16,34 @@ BOOLEAN mInterruptState = FALSE;
+
+/**
+ 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 (
@@ -25,6 +53,8 @@ CpuFlushCpuDataCache ( IN EFI_CPU_FLUSH_TYPE FlushType
)
{
+ DEBUG ((EFI_D_ERROR, "CpuFlushCpuDataCache (%lx, %lx, %x)\n", Start, Length, FlushType));
+
switch (FlushType) {
case EfiCpuFlushTypeWriteBack:
WriteBackDataCacheRange ((VOID *)(UINTN)Start, (UINTN)Length);
@@ -42,6 +72,16 @@ CpuFlushCpuDataCache ( 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 (
@@ -55,6 +95,15 @@ CpuEnableInterrupt ( }
+/**
+ 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 (
@@ -67,6 +116,20 @@ CpuDisableInterrupt ( 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 (
@@ -82,6 +145,23 @@ CpuGetInterruptState ( 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 (
@@ -115,17 +195,6 @@ CpuGetTimerValue ( return EFI_UNSUPPORTED;
}
-EFI_STATUS
-EFIAPI
-CpuSetMemoryAttributes (
- IN EFI_CPU_ARCH_PROTOCOL *This,
- IN EFI_PHYSICAL_ADDRESS BaseAddress,
- IN UINT64 Length,
- IN UINT64 Attributes
- )
-{
- return EFI_UNSUPPORTED;
-}
//
// Globals used to initialize the protocol
@@ -149,8 +218,26 @@ CpuDxeInitialize ( IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
-{
+{
+ EFI_STATUS Status;
+
InitializeExceptions (&mCpu);
- return gBS->InstallMultipleProtocolInterfaces (&mCpuHandle, &gEfiCpuArchProtocolGuid, &mCpu, NULL);
+
+
+ Status = gBS->InstallMultipleProtocolInterfaces (
+ &mCpuHandle,
+ &gEfiCpuArchProtocolGuid, &mCpu,
+ &gVirtualUncachedPagesProtocolGuid, &gVirtualUncachedPages,
+ NULL
+ );
+
+ //
+ // Make sure GCD and MMU settings match. This API calls gDS->SetMemorySpaceAttributes ()
+ // and that calls EFI_CPU_ARCH_PROTOCOL.SetMemoryAttributes, so this code needs to go
+ // after the protocol is installed
+ //
+ SyncCacheConfig (&mCpu);
+
+ return Status;
}
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