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/** @file
*
* Copyright (c) 2011-2013, ARM Limited. All rights reserved.
* Copyright (c) 2014, Linaro Limited. All rights reserved.
* Copyright (c) 2014, Red Hat, Inc.
*
*
* 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/IoLib.h>
#include <Library/ArmPlatformLib.h>
#include <Library/DebugLib.h>
#include <Library/PcdLib.h>
#include <ArmPlatform.h>
#include <libfdt.h>
#include <Pi/PiBootMode.h>
#include <Uefi/UefiBaseType.h>
#include <Uefi/UefiMultiPhase.h>
/**
Return the current Boot Mode
This function returns the boot reason on the platform
@return Return the current Boot Mode of the platform
**/
EFI_BOOT_MODE
ArmPlatformGetBootMode (
VOID
)
{
return BOOT_WITH_FULL_CONFIGURATION;
}
/**
This function is called by PrePeiCore, in the SEC phase.
**/
RETURN_STATUS
ArmPlatformInitialize (
IN UINTN MpId
)
{
//
// We are relying on ArmPlatformInitializeSystemMemory () being called from
// InitializeMemory (), which only occurs if the following feature is disabled
//
ASSERT (!FeaturePcdGet (PcdSystemMemoryInitializeInSec));
return RETURN_SUCCESS;
}
/**
Initialize the system (or sometimes called permanent) memory
This memory is generally represented by the DRAM.
This function is called from InitializeMemory() in MemoryInitPeim, in the PEI
phase.
**/
VOID
ArmPlatformInitializeSystemMemory (
VOID
)
{
VOID *DeviceTreeBase;
INT32 Node, Prev;
UINT64 NewBase, CurBase;
UINT64 NewSize, CurSize;
CONST CHAR8 *Type;
INT32 Len;
CONST UINT64 *RegProp;
RETURN_STATUS PcdStatus;
NewBase = 0;
NewSize = 0;
DeviceTreeBase = (VOID *)(UINTN)PcdGet64 (PcdDeviceTreeInitialBaseAddress);
ASSERT (DeviceTreeBase != NULL);
//
// Make sure we have a valid device tree blob
//
ASSERT (fdt_check_header (DeviceTreeBase) == 0);
//
// Look for the lowest memory node
//
for (Prev = 0;; Prev = Node) {
Node = fdt_next_node (DeviceTreeBase, Prev, NULL);
if (Node < 0) {
break;
}
//
// Check for memory node
//
Type = fdt_getprop (DeviceTreeBase, Node, "device_type", &Len);
if (Type && AsciiStrnCmp (Type, "memory", Len) == 0) {
//
// Get the 'reg' property of this node. For now, we will assume
// two 8 byte quantities for base and size, respectively.
//
RegProp = fdt_getprop (DeviceTreeBase, Node, "reg", &Len);
if (RegProp != 0 && Len == (2 * sizeof (UINT64))) {
CurBase = fdt64_to_cpu (ReadUnaligned64 (RegProp));
CurSize = fdt64_to_cpu (ReadUnaligned64 (RegProp + 1));
DEBUG ((EFI_D_INFO, "%a: System RAM @ 0x%lx - 0x%lx\n",
__FUNCTION__, CurBase, CurBase + CurSize - 1));
if (NewBase > CurBase || NewBase == 0) {
NewBase = CurBase;
NewSize = CurSize;
}
} else {
DEBUG ((EFI_D_ERROR, "%a: Failed to parse FDT memory node\n",
__FUNCTION__));
}
}
}
//
// Make sure the start of DRAM matches our expectation
//
ASSERT (FixedPcdGet64 (PcdSystemMemoryBase) == NewBase);
PcdStatus = PcdSet64S (PcdSystemMemorySize, NewSize);
ASSERT_RETURN_ERROR (PcdStatus);
//
// We need to make sure that the machine we are running on has at least
// 128 MB of memory configured, and is currently executing this binary from
// NOR flash. This prevents a device tree image in DRAM from getting
// clobbered when our caller installs permanent PEI RAM, before we have a
// chance of marking its location as reserved or copy it to a freshly
// allocated block in the permanent PEI RAM in the platform PEIM.
//
ASSERT (NewSize >= SIZE_128MB);
ASSERT (
(((UINT64)PcdGet64 (PcdFdBaseAddress) +
(UINT64)PcdGet32 (PcdFdSize)) <= NewBase) ||
((UINT64)PcdGet64 (PcdFdBaseAddress) >= (NewBase + NewSize)));
}
VOID
ArmPlatformGetPlatformPpiList (
OUT UINTN *PpiListSize,
OUT EFI_PEI_PPI_DESCRIPTOR **PpiList
)
{
*PpiListSize = 0;
*PpiList = NULL;
}
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