OvmfPkg/RiscVVirt: Add SEC module
Add the SEC module for RISC-V Qemu virt machine support. It uses the PEI less design. Cc: Ard Biesheuvel <ardb+tianocore@kernel.org> Cc: Jiewen Yao <jiewen.yao@intel.com> Cc: Jordan Justen <jordan.l.justen@intel.com> Cc: Gerd Hoffmann <kraxel@redhat.com> Signed-off-by: Sunil V L <sunilvl@ventanamicro.com> Acked-by: Abner Chang <abner.chang@amd.com> Reviewed-by: Andrei Warkentin <andrei.warkentin@intel.com> Acked-by: Jiewen Yao <Jiewen.yao@intel.com> Acked-by: Ard Biesheuvel <ardb@kernel.org>
This commit is contained in:
Sunil V L
mergify[bot]
263
OvmfPkg/RiscVVirt/Sec/Memory.c
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263
OvmfPkg/RiscVVirt/Sec/Memory.c
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/** @file
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Memory Detection for Virtual Machines.
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Copyright (c) 2021, Hewlett Packard Enterprise Development LP. All rights reserved.<BR>
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Copyright (c) 2006 - 2014, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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Module Name:
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MemDetect.c
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**/
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//
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// The package level header files this module uses
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//
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#include <PiPei.h>
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//
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// The Library classes this module consumes
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//
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#include <Library/BaseMemoryLib.h>
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#include <Library/DebugLib.h>
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#include <Library/HobLib.h>
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#include <Library/IoLib.h>
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#include <Library/PcdLib.h>
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#include <Library/PeimEntryPoint.h>
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#include <Library/ResourcePublicationLib.h>
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#include <Library/BaseRiscVSbiLib.h>
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#include <Register/RiscV64/RiscVEncoding.h>
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#include <Library/PrePiLib.h>
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#include <libfdt.h>
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#include <Guid/FdtHob.h>
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VOID
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BuildMemoryTypeInformationHob (
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VOID
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);
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/**
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Build reserved memory range resource HOB.
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@param MemoryBase Reserved memory range base address.
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@param MemorySize Reserved memory range size.
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**/
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STATIC
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VOID
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AddReservedMemoryBaseSizeHob (
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EFI_PHYSICAL_ADDRESS MemoryBase,
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UINT64 MemorySize
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)
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{
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BuildResourceDescriptorHob (
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EFI_RESOURCE_MEMORY_RESERVED,
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EFI_RESOURCE_ATTRIBUTE_PRESENT |
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EFI_RESOURCE_ATTRIBUTE_INITIALIZED |
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EFI_RESOURCE_ATTRIBUTE_UNCACHEABLE |
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EFI_RESOURCE_ATTRIBUTE_TESTED,
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MemoryBase,
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MemorySize
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);
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}
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/**
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Create memory range resource HOB using the memory base
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address and size.
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@param MemoryBase Memory range base address.
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@param MemorySize Memory range size.
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**/
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STATIC
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VOID
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AddMemoryBaseSizeHob (
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EFI_PHYSICAL_ADDRESS MemoryBase,
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UINT64 MemorySize
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)
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{
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BuildResourceDescriptorHob (
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EFI_RESOURCE_SYSTEM_MEMORY,
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EFI_RESOURCE_ATTRIBUTE_PRESENT |
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EFI_RESOURCE_ATTRIBUTE_INITIALIZED |
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EFI_RESOURCE_ATTRIBUTE_UNCACHEABLE |
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EFI_RESOURCE_ATTRIBUTE_WRITE_COMBINEABLE |
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EFI_RESOURCE_ATTRIBUTE_WRITE_THROUGH_CACHEABLE |
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EFI_RESOURCE_ATTRIBUTE_WRITE_BACK_CACHEABLE |
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EFI_RESOURCE_ATTRIBUTE_TESTED,
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MemoryBase,
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MemorySize
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);
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}
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/**
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Create memory range resource HOB using memory base
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address and top address of the memory range.
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@param MemoryBase Memory range base address.
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@param MemoryLimit Memory range size.
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**/
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STATIC
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VOID
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AddMemoryRangeHob (
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EFI_PHYSICAL_ADDRESS MemoryBase,
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EFI_PHYSICAL_ADDRESS MemoryLimit
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)
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{
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AddMemoryBaseSizeHob (MemoryBase, (UINT64)(MemoryLimit - MemoryBase));
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}
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/**
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Configure MMU
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**/
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STATIC
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VOID
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InitMmu (
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)
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{
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//
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// Set supervisor translation mode to Bare mode
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//
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RiscVSetSupervisorAddressTranslationRegister ((UINT64)SATP_MODE_OFF << 60);
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DEBUG ((DEBUG_INFO, "%a: Set Supervisor address mode to bare-metal mode.\n", __FUNCTION__));
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}
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/**
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Publish system RAM and reserve memory regions.
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**/
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STATIC
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VOID
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InitializeRamRegions (
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EFI_PHYSICAL_ADDRESS SystemMemoryBase,
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UINT64 SystemMemorySize,
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EFI_PHYSICAL_ADDRESS MmodeResvBase,
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UINT64 MmodeResvSize
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)
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{
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/*
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* M-mode FW can be loaded anywhere in memory but should not overlap
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* with the EDK2. This can happen if some other boot code loads the
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* M-mode firmware.
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*
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* The M-mode firmware memory should be marked as reserved memory
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* so that OS doesn't use it.
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*/
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DEBUG ((
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DEBUG_INFO,
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"%a: M-mode FW Memory Start:0x%lx End:0x%lx\n",
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__FUNCTION__,
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MmodeResvBase,
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MmodeResvBase + MmodeResvSize
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));
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AddReservedMemoryBaseSizeHob (MmodeResvBase, MmodeResvSize);
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if (MmodeResvBase > SystemMemoryBase) {
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AddMemoryRangeHob (SystemMemoryBase, MmodeResvBase);
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}
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AddMemoryRangeHob (
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MmodeResvBase + MmodeResvSize,
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SystemMemoryBase + SystemMemorySize
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);
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}
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/**
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Initialize memory hob based on the DTB information.
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@return EFI_SUCCESS The memory hob added successfully.
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**/
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EFI_STATUS
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MemoryPeimInitialization (
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VOID
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)
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{
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EFI_RISCV_FIRMWARE_CONTEXT *FirmwareContext;
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CONST UINT64 *RegProp;
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CONST CHAR8 *Type;
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UINT64 CurBase, CurSize;
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INT32 Node, Prev;
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INT32 Len;
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VOID *FdtPointer;
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EFI_PHYSICAL_ADDRESS MmodeResvBase;
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UINT64 MmodeResvSize;
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FirmwareContext = NULL;
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GetFirmwareContextPointer (&FirmwareContext);
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if (FirmwareContext == NULL) {
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DEBUG ((DEBUG_ERROR, "%a: Firmware Context is NULL\n", __FUNCTION__));
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return EFI_UNSUPPORTED;
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}
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FdtPointer = (VOID *)FirmwareContext->FlattenedDeviceTree;
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if (FdtPointer == NULL) {
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DEBUG ((DEBUG_ERROR, "%a: Invalid FDT pointer\n", __FUNCTION__));
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return EFI_UNSUPPORTED;
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}
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/* try to locate the reserved memory opensbi node */
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Node = fdt_path_offset (FdtPointer, "/reserved-memory/mmode_resv0");
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if (Node >= 0) {
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RegProp = fdt_getprop (FdtPointer, Node, "reg", &Len);
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if ((RegProp != 0) && (Len == (2 * sizeof (UINT64)))) {
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MmodeResvBase = fdt64_to_cpu (ReadUnaligned64 (RegProp));
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MmodeResvSize = fdt64_to_cpu (ReadUnaligned64 (RegProp + 1));
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}
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}
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// Look for the lowest memory node
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for (Prev = 0; ; Prev = Node) {
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Node = fdt_next_node (FdtPointer, Prev, NULL);
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if (Node < 0) {
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break;
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}
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// Check for memory node
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Type = fdt_getprop (FdtPointer, Node, "device_type", &Len);
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if (Type && (AsciiStrnCmp (Type, "memory", Len) == 0)) {
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// Get the 'reg' property of this node. For now, we will assume
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// two 8 byte quantities for base and size, respectively.
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RegProp = fdt_getprop (FdtPointer, Node, "reg", &Len);
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if ((RegProp != 0) && (Len == (2 * sizeof (UINT64)))) {
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CurBase = fdt64_to_cpu (ReadUnaligned64 (RegProp));
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CurSize = fdt64_to_cpu (ReadUnaligned64 (RegProp + 1));
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DEBUG ((
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DEBUG_INFO,
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"%a: System RAM @ 0x%lx - 0x%lx\n",
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__FUNCTION__,
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CurBase,
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CurBase + CurSize - 1
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));
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if ((MmodeResvBase >= CurBase) && ((MmodeResvBase + MmodeResvSize) <= (CurBase + CurSize))) {
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InitializeRamRegions (
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CurBase,
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CurSize,
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MmodeResvBase,
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MmodeResvSize
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);
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} else {
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AddMemoryBaseSizeHob (CurBase, CurSize);
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}
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} else {
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DEBUG ((
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DEBUG_ERROR,
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"%a: Failed to parse FDT memory node\n",
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__FUNCTION__
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));
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}
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}
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}
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InitMmu ();
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BuildMemoryTypeInformationHob ();
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return EFI_SUCCESS;
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}
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