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/*++
Copyright (c) 1998 Intel Corporation
Module Name:
hw.c
Abstract:
Debug library functions for Hardware IO access
Revision History
--*/
#include "lib.h"
EFI_STATUS
InitializeGlobalIoDevice (
IN EFI_DEVICE_PATH *DevicePath,
IN EFI_GUID *Protocol,
IN CHAR8 *ErrorStr,
OUT EFI_DEVICE_IO_INTERFACE **GlobalIoFncs
)
/*++
Routine Description:
Check to see if DevicePath exists for a given Protocol. Return Error if it
exists. Return GlobalIoFuncs set match the DevicePath
Arguments:
DevicePath - to operate on
Protocol - to check the DevicePath against
ErrorStr - ASCII string to display on error
GlobalIoFncs - Returned with DeviceIoProtocol for the DevicePath
Returns:
Pass or Fail based on wether GlobalIoFncs where found
--*/
{
EFI_STATUS Status;
EFI_HANDLE Handle;
//
// Check to see if this device path already has Protocol on it.
// if so we are loading recursivly and should exit with an error
//
Status = uefi_call_wrapper(BS->LocateDevicePath, 3, Protocol, &DevicePath, &Handle);
if (!EFI_ERROR(Status)) {
DEBUG ((D_INIT, "Device Already Loaded for %a device\n", ErrorStr));
return EFI_LOAD_ERROR;
}
Status = uefi_call_wrapper(BS->LocateDevicePath, 3, &DeviceIoProtocol, &DevicePath, &Handle);
if (!EFI_ERROR(Status)) {
Status = uefi_call_wrapper(BS->HandleProtocol, 3, Handle, &DeviceIoProtocol, (VOID*)GlobalIoFncs);
}
ASSERT (!EFI_ERROR(Status));
return Status;
}
UINT32
ReadPort (
IN EFI_DEVICE_IO_INTERFACE *GlobalIoFncs,
IN EFI_IO_WIDTH Width,
IN UINTN Port
)
{
UINT32 Data;
EFI_STATUS Status;
Status = uefi_call_wrapper(GlobalIoFncs->Io.Read, 5, GlobalIoFncs, Width, (UINT64)Port, 1, &Data);
ASSERT(!EFI_ERROR(Status));
return Data;
}
UINT32
WritePort (
IN EFI_DEVICE_IO_INTERFACE *GlobalIoFncs,
IN EFI_IO_WIDTH Width,
IN UINTN Port,
IN UINTN Data
)
{
EFI_STATUS Status;
Status = uefi_call_wrapper(GlobalIoFncs->Io.Write, 5, GlobalIoFncs, Width, (UINT64)Port, 1, &Data);
ASSERT(!EFI_ERROR(Status));
return (UINT32)Data;
}
UINT32
ReadPciConfig (
IN EFI_DEVICE_IO_INTERFACE *GlobalIoFncs,
IN EFI_IO_WIDTH Width,
IN UINTN Address
)
{
UINT32 Data;
EFI_STATUS Status;
Status = uefi_call_wrapper(GlobalIoFncs->Pci.Read, 5, GlobalIoFncs, Width, (UINT64)Address, 1, &Data);
ASSERT(!EFI_ERROR(Status));
return Data;
}
UINT32
WritePciConfig (
IN EFI_DEVICE_IO_INTERFACE *GlobalIoFncs,
IN EFI_IO_WIDTH Width,
IN UINTN Address,
IN UINTN Data
)
{
EFI_STATUS Status;
Status = uefi_call_wrapper(GlobalIoFncs->Pci.Write, 5, GlobalIoFncs, Width, (UINT64)Address, 1, &Data);
ASSERT(!EFI_ERROR(Status));
return (UINT32)Data;
}
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