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/** @file
Copyright (c) 2014-2018, Linaro Ltd. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#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;
}
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