diff options
Diffstat (limited to 'OvmfPkg/QemuFlashFvbServicesRuntimeDxe/FwBlockServiceDxe.c')
| -rw-r--r-- | OvmfPkg/QemuFlashFvbServicesRuntimeDxe/FwBlockServiceDxe.c | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/OvmfPkg/QemuFlashFvbServicesRuntimeDxe/FwBlockServiceDxe.c b/OvmfPkg/QemuFlashFvbServicesRuntimeDxe/FwBlockServiceDxe.c index 63b308658e..37deece363 100644 --- a/OvmfPkg/QemuFlashFvbServicesRuntimeDxe/FwBlockServiceDxe.c +++ b/OvmfPkg/QemuFlashFvbServicesRuntimeDxe/FwBlockServiceDxe.c @@ -17,6 +17,7 @@ #include <Guid/EventGroup.h>
#include <Library/DebugLib.h>
#include <Library/DevicePathLib.h>
+#include <Library/DxeServicesTableLib.h>
#include <Library/PcdLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/UefiRuntimeLib.h>
@@ -155,3 +156,52 @@ InstallVirtualAddressChangeHandler ( );
ASSERT_EFI_ERROR (Status);
}
+
+EFI_STATUS
+MarkIoMemoryRangeForRuntimeAccess (
+ IN EFI_PHYSICAL_ADDRESS BaseAddress,
+ IN UINTN Length
+ )
+{
+ EFI_STATUS Status;
+ EFI_GCD_MEMORY_SPACE_DESCRIPTOR GcdDescriptor;
+
+ //
+ // Mark flash region as runtime memory
+ //
+ Status = gDS->RemoveMemorySpace (
+ BaseAddress,
+ Length
+ );
+
+ Status = gDS->AddMemorySpace (
+ EfiGcdMemoryTypeMemoryMappedIo,
+ BaseAddress,
+ Length,
+ EFI_MEMORY_UC | EFI_MEMORY_RUNTIME
+ );
+ ASSERT_EFI_ERROR (Status);
+
+ Status = gDS->AllocateMemorySpace (
+ EfiGcdAllocateAddress,
+ EfiGcdMemoryTypeMemoryMappedIo,
+ 0,
+ Length,
+ &BaseAddress,
+ gImageHandle,
+ NULL
+ );
+ ASSERT_EFI_ERROR (Status);
+
+ Status = gDS->GetMemorySpaceDescriptor (BaseAddress, &GcdDescriptor);
+ ASSERT_EFI_ERROR (Status);
+
+ Status = gDS->SetMemorySpaceAttributes (
+ BaseAddress,
+ Length,
+ GcdDescriptor.Attributes | EFI_MEMORY_RUNTIME
+ );
+ ASSERT_EFI_ERROR (Status);
+
+ return Status;
+}
|