mirror of https://github.com/acidanthera/audk.git
102 lines
3.1 KiB
C
102 lines
3.1 KiB
C
/** @file
|
|
|
|
Copyright (c) 2014-2018, Linaro Ltd. All rights reserved.<BR>
|
|
|
|
This program and the accompanying materials
|
|
are licensed and made available under the terms and conditions of the BSD License
|
|
which accompanies this distribution. The full text of the license may be found at
|
|
http://opensource.org/licenses/bsd-license.php
|
|
|
|
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
|
|
|
|
**/
|
|
|
|
#include <Library/BaseLib.h>
|
|
#include <Library/DebugLib.h>
|
|
#include <Library/NorFlashPlatformLib.h>
|
|
#include <Library/UefiBootServicesTableLib.h>
|
|
|
|
#include <Protocol/FdtClient.h>
|
|
|
|
#define QEMU_NOR_BLOCK_SIZE SIZE_256KB
|
|
|
|
#define MAX_FLASH_BANKS 4
|
|
|
|
EFI_STATUS
|
|
NorFlashPlatformInitialization (
|
|
VOID
|
|
)
|
|
{
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
NOR_FLASH_DESCRIPTION mNorFlashDevices[MAX_FLASH_BANKS];
|
|
|
|
EFI_STATUS
|
|
NorFlashPlatformGetDevices (
|
|
OUT NOR_FLASH_DESCRIPTION **NorFlashDescriptions,
|
|
OUT UINT32 *Count
|
|
)
|
|
{
|
|
FDT_CLIENT_PROTOCOL *FdtClient;
|
|
INT32 Node;
|
|
EFI_STATUS Status;
|
|
EFI_STATUS FindNodeStatus;
|
|
CONST UINT32 *Reg;
|
|
UINT32 PropSize;
|
|
UINT32 Num;
|
|
UINT64 Base;
|
|
UINT64 Size;
|
|
|
|
Status = gBS->LocateProtocol (&gFdtClientProtocolGuid, NULL,
|
|
(VOID **)&FdtClient);
|
|
ASSERT_EFI_ERROR (Status);
|
|
|
|
Num = 0;
|
|
for (FindNodeStatus = FdtClient->FindCompatibleNode (FdtClient,
|
|
"cfi-flash", &Node);
|
|
!EFI_ERROR (FindNodeStatus) && Num < MAX_FLASH_BANKS;
|
|
FindNodeStatus = FdtClient->FindNextCompatibleNode (FdtClient,
|
|
"cfi-flash", Node, &Node)) {
|
|
|
|
Status = FdtClient->GetNodeProperty (FdtClient, Node, "reg",
|
|
(CONST VOID **)&Reg, &PropSize);
|
|
if (EFI_ERROR (Status)) {
|
|
DEBUG ((DEBUG_ERROR, "%a: GetNodeProperty () failed (Status == %r)\n",
|
|
__FUNCTION__, Status));
|
|
continue;
|
|
}
|
|
|
|
ASSERT ((PropSize % (4 * sizeof (UINT32))) == 0);
|
|
|
|
while (PropSize >= (4 * sizeof (UINT32)) && Num < MAX_FLASH_BANKS) {
|
|
Base = SwapBytes64 (ReadUnaligned64 ((VOID *)&Reg[0]));
|
|
Size = SwapBytes64 (ReadUnaligned64 ((VOID *)&Reg[2]));
|
|
Reg += 4;
|
|
|
|
PropSize -= 4 * sizeof (UINT32);
|
|
|
|
//
|
|
// Disregard any flash devices that overlap with the primary FV.
|
|
// The firmware is not updatable from inside the guest anyway.
|
|
//
|
|
if ((PcdGet64 (PcdFvBaseAddress) + PcdGet32 (PcdFvSize) > Base) &&
|
|
(Base + Size) > PcdGet64 (PcdFvBaseAddress)) {
|
|
continue;
|
|
}
|
|
|
|
mNorFlashDevices[Num].DeviceBaseAddress = (UINTN)Base;
|
|
mNorFlashDevices[Num].RegionBaseAddress = (UINTN)Base;
|
|
mNorFlashDevices[Num].Size = (UINTN)Size;
|
|
mNorFlashDevices[Num].BlockSize = QEMU_NOR_BLOCK_SIZE;
|
|
Num++;
|
|
}
|
|
}
|
|
|
|
*NorFlashDescriptions = mNorFlashDevices;
|
|
*Count = Num;
|
|
|
|
return EFI_SUCCESS;
|
|
}
|