Sync/gnu-efi/lib/hw.c
Curle d588e232c4 Major overhaul of this branch.
This branch has been dedicated to purely the UEFI bootloader.
As such, all other code has been removed.

This code can be compiled with Visual Studio, gcc or llvm.
2019-07-17 21:10:29 +01:00

133 lines
3.2 KiB
C

/*++
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 EFI_UNUSED,
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 EFI_UNUSED;
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 EFI_UNUSED;
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 EFI_UNUSED;
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 EFI_UNUSED;
Status = uefi_call_wrapper(GlobalIoFncs->Pci.Write, 5, GlobalIoFncs, Width, (UINT64)Address, 1, &Data);
ASSERT(!EFI_ERROR(Status));
return (UINT32)Data;
}