KvmtoolVirtMemInfoLib.c

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#include <Base.h>
#include <Library/ArmLib.h>
#include <Library/BaseLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/DebugLib.h>
#include <Library/MemoryAllocationLib.h>
 
// Number of Virtual Memory Map Descriptors
#define MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS  5
 
VOID
ArmVirtGetMemoryMap (
  OUT ARM_MEMORY_REGION_DESCRIPTOR  **VirtualMemoryMap
  )
{
  ARM_MEMORY_REGION_DESCRIPTOR  *VirtualMemoryTable;
  UINTN                         Idx;
  EFI_PHYSICAL_ADDRESS          TopOfAddressSpace;
 
  ASSERT (VirtualMemoryMap != NULL);
 
  TopOfAddressSpace = LShiftU64 (1ULL, ArmGetPhysicalAddressBits ());
 
  VirtualMemoryTable = (ARM_MEMORY_REGION_DESCRIPTOR *)
                       AllocatePages (
                         EFI_SIZE_TO_PAGES (
                           sizeof (ARM_MEMORY_REGION_DESCRIPTOR) *
                           MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS
                           )
                         );
  if (VirtualMemoryTable == NULL) {
    DEBUG ((
      DEBUG_ERROR,
      "%a: Error: Failed to Allocate Pages\n",
      __func__
      ));
    return;
  }
 
  Idx = 0;
  // System DRAM
  VirtualMemoryTable[Idx].PhysicalBase = PcdGet64 (PcdSystemMemoryBase);
  VirtualMemoryTable[Idx].VirtualBase  = VirtualMemoryTable[Idx].PhysicalBase;
  VirtualMemoryTable[Idx].Length       = PcdGet64 (PcdSystemMemorySize);
  VirtualMemoryTable[Idx].Attributes   = ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK;
 
  // Peripheral space before DRAM
  VirtualMemoryTable[++Idx].PhysicalBase = 0x0;
  VirtualMemoryTable[Idx].VirtualBase    = 0x0;
  VirtualMemoryTable[Idx].Length         = PcdGet64 (PcdSystemMemoryBase);
  VirtualMemoryTable[Idx].Attributes     = ARM_MEMORY_REGION_ATTRIBUTE_DEVICE;
 
  // Peripheral space after DRAM
  VirtualMemoryTable[++Idx].PhysicalBase = PcdGet64 (PcdSystemMemoryBase) +
                                           PcdGet64 (PcdSystemMemorySize);
  VirtualMemoryTable[Idx].VirtualBase = VirtualMemoryTable[Idx].PhysicalBase;
  VirtualMemoryTable[Idx].Length      = TopOfAddressSpace -
                                        VirtualMemoryTable[Idx].PhysicalBase;
  VirtualMemoryTable[Idx].Attributes = ARM_MEMORY_REGION_ATTRIBUTE_DEVICE;
 
  // Map the FV region as normal executable memory
  VirtualMemoryTable[++Idx].PhysicalBase = PcdGet64 (PcdFvBaseAddress);
  VirtualMemoryTable[Idx].VirtualBase    = VirtualMemoryTable[Idx].PhysicalBase;
  VirtualMemoryTable[Idx].Length         = FixedPcdGet32 (PcdFvSize);
  VirtualMemoryTable[Idx].Attributes     = ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK;
 
  // End of Table
  VirtualMemoryTable[++Idx].PhysicalBase = 0;
  VirtualMemoryTable[Idx].VirtualBase    = 0;
  VirtualMemoryTable[Idx].Length         = 0;
  VirtualMemoryTable[Idx].Attributes     = (ARM_MEMORY_REGION_ATTRIBUTES)0;
 
  ASSERT ((Idx + 1) <= MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS);
 
  *VirtualMemoryMap = VirtualMemoryTable;
}