/** @file
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*
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* Copyright (c) 2019, Pete Batard <pete@akeo.ie>
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* Copyright (c) 2017-2018, Andrey Warkentin <andrey.warkentin@gmail.com>
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* Copyright (c) 2014, Linaro Limited. All rights reserved.
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* Copyright (c) 2013-2018, ARM Limited. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-2-Clause-Patent
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*
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**/
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#include <Library/ArmPlatformLib.h>
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#include <Library/DebugLib.h>
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#include <Library/MemoryAllocationLib.h>
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#include <Library/PcdLib.h>
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#include <Library/RPiMem.h>
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#include <IndustryStandard/Bcm2711.h>
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#include <IndustryStandard/Bcm2836.h>
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UINT64 mSystemMemoryBase;
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extern UINT64 mSystemMemoryEnd;
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UINT64 mVideoCoreBase;
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UINT64 mVideoCoreSize;
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UINT32 mBoardRevision;
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// The total number of descriptors, including the final "end-of-table" descriptor.
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#define MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS 11
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STATIC BOOLEAN VirtualMemoryInfoInitialized = FALSE;
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STATIC RPI_MEMORY_REGION_INFO VirtualMemoryInfo[MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS];
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#define VariablesSize (FixedPcdGet32(PcdFlashNvStorageVariableSize) + \
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FixedPcdGet32(PcdFlashNvStorageFtwWorkingSize) + \
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FixedPcdGet32(PcdFlashNvStorageFtwSpareSize) + \
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FixedPcdGet32(PcdNvStorageEventLogSize))
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#define VariablesBase (FixedPcdGet64(PcdFdBaseAddress) + \
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FixedPcdGet32(PcdFdSize) - \
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VariablesSize)
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/**
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Return the Virtual Memory Map of your platform
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This Virtual Memory Map is used by MemoryInitPei Module to initialize the MMU
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on your platform.
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@param[out] VirtualMemoryMap Array of ARM_MEMORY_REGION_DESCRIPTOR
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describing a Physical-to-Virtual Memory
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mapping. This array must be ended by a
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zero-filled entry
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**/
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VOID
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ArmPlatformGetVirtualMemoryMap (
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IN ARM_MEMORY_REGION_DESCRIPTOR** VirtualMemoryMap
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)
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{
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UINTN Index = 0;
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INT64 TotalMemorySize;
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INT64 MemorySizeBelow3GB;
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INT64 MemorySizeBelow4GB;
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ARM_MEMORY_REGION_DESCRIPTOR *VirtualMemoryTable;
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// Early output of the info we got from VideoCore can prove valuable.
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DEBUG ((DEBUG_INFO, "Board Rev: 0x%lX\n", mBoardRevision));
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DEBUG ((DEBUG_INFO, "RAM < 1GB: 0x%ll08X (Size 0x%ll08X)\n", mSystemMemoryBase, mSystemMemoryEnd + 1));
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DEBUG ((DEBUG_INFO, "VideoCore: 0x%ll08X (Size 0x%ll08X)\n", mVideoCoreBase, mVideoCoreSize));
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ASSERT (mSystemMemoryBase == 0);
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ASSERT (VirtualMemoryMap != NULL);
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// Compute the total RAM size available on this platform
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TotalMemorySize = SIZE_256MB;
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TotalMemorySize <<= (mBoardRevision >> 20) & 0x07;
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DEBUG ((DEBUG_INFO, "Total RAM: 0x%ll08X\n", TotalMemorySize));
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//
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// Ensure that what we declare as System Memory doesn't overlap with the
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// SoC MMIO registers. This can be achieved through a MIN () with the
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// base address since SystemMemoryBase is 0 (we assert if it isn't).
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//
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ASSERT (BCM2836_SOC_REGISTERS < 4UL * SIZE_1GB);
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MemorySizeBelow4GB = MIN(TotalMemorySize, 4UL * SIZE_1GB);
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MemorySizeBelow4GB = MIN(MemorySizeBelow4GB, BCM2836_SOC_REGISTERS);
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if (BCM2711_SOC_REGISTERS > 0) {
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ASSERT (BCM2836_SOC_REGISTERS < 4UL * SIZE_1GB);
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MemorySizeBelow4GB = MIN(MemorySizeBelow4GB, BCM2711_SOC_REGISTERS);
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}
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//
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// By default we limit the memory to 3 GB to work around OS support for
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// DMA bugs in the SoC, for OSes that don't support _DMA range descriptors.
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// On boards with more RAM (4GB, 8GB), the extra memory is added by ConfigDxe
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// provided the configuration setting for 3GB limit is off.
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//
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MemorySizeBelow3GB = MIN(MemorySizeBelow4GB, 3UL * SIZE_1GB);
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//
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// On Pi 3 we've seen SoC registers may overlap the reported VideoCore range,
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// so clamp that down as well.
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//
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if (mVideoCoreBase + mVideoCoreSize > BCM2836_SOC_REGISTERS) {
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mVideoCoreSize = BCM2836_SOC_REGISTERS - mVideoCoreBase;
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DEBUG ((DEBUG_WARN, "VideoCore range overlapped SoC MMIO, now 0x%ll08X (Size 0x%ll08X)\n",
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mVideoCoreBase, mVideoCoreSize));
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}
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VirtualMemoryTable = (ARM_MEMORY_REGION_DESCRIPTOR*)AllocatePages
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(EFI_SIZE_TO_PAGES (sizeof (ARM_MEMORY_REGION_DESCRIPTOR) *
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MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS));
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if (VirtualMemoryTable == NULL) {
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return;
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}
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// Firmware Volume
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VirtualMemoryTable[Index].PhysicalBase = FixedPcdGet64 (PcdFdBaseAddress);
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VirtualMemoryTable[Index].VirtualBase = VirtualMemoryTable[Index].PhysicalBase;
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VirtualMemoryTable[Index].Length = FixedPcdGet32 (PcdFdSize) - VariablesSize;
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VirtualMemoryTable[Index].Attributes = ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK;
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VirtualMemoryInfo[Index].Type = RPI_MEM_RESERVED_REGION;
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VirtualMemoryInfo[Index++].Name = L"FD";
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// Variable Volume
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VirtualMemoryTable[Index].PhysicalBase = VariablesBase;
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VirtualMemoryTable[Index].VirtualBase = VirtualMemoryTable[Index].PhysicalBase;
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VirtualMemoryTable[Index].Length = VariablesSize;
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VirtualMemoryTable[Index].Attributes = ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK;
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VirtualMemoryInfo[Index].Type = RPI_MEM_RUNTIME_REGION;
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VirtualMemoryInfo[Index++].Name = L"FD Variables";
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//
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// Both the the Pi 4 and Pi 3 implementations expect the DTB to directly follow the FD.
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//
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VirtualMemoryTable[Index].PhysicalBase = FixedPcdGet32 (PcdFdtBaseAddress);
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VirtualMemoryTable[Index].VirtualBase = VirtualMemoryTable[Index].PhysicalBase;
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VirtualMemoryTable[Index].Length = FixedPcdGet32 (PcdFdtSize);;
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VirtualMemoryTable[Index].Attributes = ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK;
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VirtualMemoryInfo[Index].Type = RPI_MEM_RESERVED_REGION;
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VirtualMemoryInfo[Index++].Name = L"Flattened Device Tree";
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if (BCM2711_SOC_REGISTERS == 0) {
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//
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// TF-A reserved RAM only exists for the Pi 3 TF-A.
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//
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// This is 2MB that directly follows the FD.
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//
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VirtualMemoryTable[Index].PhysicalBase = (FixedPcdGet64(PcdFdBaseAddress) + FixedPcdGet32(PcdFdSize));
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VirtualMemoryTable[Index].VirtualBase = VirtualMemoryTable[Index].PhysicalBase;
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VirtualMemoryTable[Index].Length = FixedPcdGet64 (PcdSystemMemoryBase) - VirtualMemoryTable[Index].PhysicalBase;
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VirtualMemoryTable[Index].Attributes = ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK;
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VirtualMemoryInfo[Index].Type = RPI_MEM_RESERVED_REGION;
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VirtualMemoryInfo[Index++].Name = L"TF-A RAM";
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}
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// Base System RAM
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VirtualMemoryTable[Index].PhysicalBase = FixedPcdGet64 (PcdSystemMemoryBase);
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VirtualMemoryTable[Index].VirtualBase = VirtualMemoryTable[Index].PhysicalBase;
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VirtualMemoryTable[Index].Length = mSystemMemoryEnd + 1 - FixedPcdGet64 (PcdSystemMemoryBase);
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VirtualMemoryTable[Index].Attributes = ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK;
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VirtualMemoryInfo[Index].Type = RPI_MEM_BASIC_REGION;
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VirtualMemoryInfo[Index++].Name = L"System RAM < 1GB";
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// GPU Reserved
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VirtualMemoryTable[Index].PhysicalBase = mVideoCoreBase;
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VirtualMemoryTable[Index].VirtualBase = VirtualMemoryTable[Index].PhysicalBase;
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VirtualMemoryTable[Index].Length = mVideoCoreSize;
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VirtualMemoryTable[Index].Attributes = ARM_MEMORY_REGION_ATTRIBUTE_DEVICE;
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VirtualMemoryInfo[Index].Type = RPI_MEM_UNMAPPED_REGION;
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VirtualMemoryInfo[Index++].Name = L"GPU Reserved";
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// Extended SoC registers (PCIe, genet, ...)
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if (BCM2711_SOC_REGISTERS > 0) {
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VirtualMemoryTable[Index].PhysicalBase = BCM2711_SOC_REGISTERS;
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VirtualMemoryTable[Index].VirtualBase = VirtualMemoryTable[Index].PhysicalBase;
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VirtualMemoryTable[Index].Length = BCM2711_SOC_REGISTER_LENGTH;
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VirtualMemoryTable[Index].Attributes = ARM_MEMORY_REGION_ATTRIBUTE_DEVICE;
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VirtualMemoryInfo[Index].Type = RPI_MEM_UNMAPPED_REGION;
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VirtualMemoryInfo[Index++].Name = L"SoC Reserved (27xx)";
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}
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// Base SoC registers
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VirtualMemoryTable[Index].PhysicalBase = BCM2836_SOC_REGISTERS;
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VirtualMemoryTable[Index].VirtualBase = VirtualMemoryTable[Index].PhysicalBase;
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VirtualMemoryTable[Index].Length = BCM2836_SOC_REGISTER_LENGTH;
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VirtualMemoryTable[Index].Attributes = ARM_MEMORY_REGION_ATTRIBUTE_DEVICE;
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VirtualMemoryInfo[Index].Type = RPI_MEM_UNMAPPED_REGION;
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VirtualMemoryInfo[Index++].Name = L"SoC Reserved (283x)";
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// Memory in the 1GB - 3GB range is always available.
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if (MemorySizeBelow3GB > SIZE_1GB) {
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VirtualMemoryTable[Index].PhysicalBase = SIZE_1GB;
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VirtualMemoryTable[Index].VirtualBase = VirtualMemoryTable[Index].PhysicalBase;
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VirtualMemoryTable[Index].Length = MemorySizeBelow3GB - VirtualMemoryTable[Index].PhysicalBase;
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VirtualMemoryTable[Index].Attributes = ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK;
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VirtualMemoryInfo[Index].Type = RPI_MEM_BASIC_REGION;
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VirtualMemoryInfo[Index++].Name = L"Extended System RAM < 3GB";
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}
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//
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// If we have RAM in the 3GB - 4GB range, declare it as mapped, but don't
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// add it to the memory map. This is done later by ConfigDxe if necessary.
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//
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if (MemorySizeBelow4GB > 3UL * SIZE_1GB) {
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VirtualMemoryTable[Index].PhysicalBase = 3UL * SIZE_1GB;
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VirtualMemoryTable[Index].VirtualBase = VirtualMemoryTable[Index].PhysicalBase;
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VirtualMemoryTable[Index].Length = MemorySizeBelow4GB - VirtualMemoryTable[Index].PhysicalBase;
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VirtualMemoryTable[Index].Attributes = ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK;
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VirtualMemoryInfo[Index].Type = RPI_MEM_UNMAPPED_REGION;
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VirtualMemoryInfo[Index++].Name = L"Extended System RAM < 4GB";
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}
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// Same treatment for the memory above 4GB.
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if (TotalMemorySize > 4UL * SIZE_1GB) {
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VirtualMemoryTable[Index].PhysicalBase = 4UL * SIZE_1GB;
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VirtualMemoryTable[Index].VirtualBase = VirtualMemoryTable[Index].PhysicalBase;
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VirtualMemoryTable[Index].Length = TotalMemorySize - VirtualMemoryTable[Index].PhysicalBase;
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VirtualMemoryTable[Index].Attributes = ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK;
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VirtualMemoryInfo[Index].Type = RPI_MEM_UNMAPPED_REGION;
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VirtualMemoryInfo[Index++].Name = L"Extended System RAM >= 4GB";
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}
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// End of Table
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VirtualMemoryTable[Index].PhysicalBase = 0;
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VirtualMemoryTable[Index].VirtualBase = 0;
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VirtualMemoryTable[Index].Length = 0;
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VirtualMemoryTable[Index++].Attributes = (ARM_MEMORY_REGION_ATTRIBUTES)0;
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ASSERT(Index <= MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS);
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*VirtualMemoryMap = VirtualMemoryTable;
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VirtualMemoryInfoInitialized = TRUE;
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}
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/**
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Return additional memory info not populated by the above call.
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This call should follow the one to ArmPlatformGetVirtualMemoryMap ().
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**/
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VOID
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RpiPlatformGetVirtualMemoryInfo (
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IN RPI_MEMORY_REGION_INFO** MemoryInfo
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)
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{
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ASSERT (VirtualMemoryInfo != NULL);
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if (!VirtualMemoryInfoInitialized) {
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DEBUG ((DEBUG_ERROR,
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"ArmPlatformGetVirtualMemoryMap must be called before RpiPlatformGetVirtualMemoryInfo.\n"));
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return;
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}
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*MemoryInfo = VirtualMemoryInfo;
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}
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