OvmfPkg: Apply uncrustify changes

[mirror_edk2.git] / OvmfPkg / Fdt / HighMemDxe / HighMemDxe.c

/** @file\r
*  High memory node enumeration DXE driver for ARM and RISC-V\r
*  Virtual Machines\r
*\r
*  Copyright (c) 2015-2016, Linaro Ltd. All rights reserved.\r
*\r
*  SPDX-License-Identifier: BSD-2-Clause-Patent\r
*\r
**/\r
\r
#include <Library/BaseLib.h>\r
#include <Library/DebugLib.h>\r
#include <Library/DxeServicesTableLib.h>\r
#include <Library/PcdLib.h>\r
#include <Library/UefiBootServicesTableLib.h>\r
\r
#include <Protocol/Cpu.h>\r
#include <Protocol/FdtClient.h>\r
\r
EFI_STATUS\r
EFIAPI\r
InitializeHighMemDxe (\r
  IN EFI_HANDLE        ImageHandle,\r
  IN EFI_SYSTEM_TABLE  *SystemTable\r
  )\r
{\r
  FDT_CLIENT_PROTOCOL              *FdtClient;\r
  EFI_CPU_ARCH_PROTOCOL            *Cpu;\r
  EFI_STATUS                       Status, FindNodeStatus;\r
  INT32                            Node;\r
  CONST UINT32                     *Reg;\r
  UINT32                           RegSize;\r
  UINTN                            AddressCells, SizeCells;\r
  UINT64                           CurBase;\r
  UINT64                           CurSize;\r
  UINT64                           Attributes;\r
  EFI_GCD_MEMORY_SPACE_DESCRIPTOR  GcdDescriptor;\r
\r
  Status = gBS->LocateProtocol (\r
                  &gFdtClientProtocolGuid,\r
                  NULL,\r
                  (VOID **)&FdtClient\r
                  );\r
  ASSERT_EFI_ERROR (Status);\r
\r
  Status = gBS->LocateProtocol (\r
                  &gEfiCpuArchProtocolGuid,\r
                  NULL,\r
                  (VOID **)&Cpu\r
                  );\r
  ASSERT_EFI_ERROR (Status);\r
\r
  //\r
  // Check for memory node and add the memory spaces except the lowest one\r
  //\r
  for (FindNodeStatus = FdtClient->FindMemoryNodeReg (\r
                                     FdtClient,\r
                                     &Node,\r
                                     (CONST VOID **)&Reg,\r
                                     &AddressCells,\r
                                     &SizeCells,\r
                                     &RegSize\r
                                     );\r
       !EFI_ERROR (FindNodeStatus);\r
       FindNodeStatus = FdtClient->FindNextMemoryNodeReg (\r
                                     FdtClient,\r
                                     Node,\r
                                     &Node,\r
                                     (CONST VOID **)&Reg,\r
                                     &AddressCells,\r
                                     &SizeCells,\r
                                     &RegSize\r
                                     ))\r
  {\r
    ASSERT (AddressCells <= 2);\r
    ASSERT (SizeCells <= 2);\r
\r
    while (RegSize > 0) {\r
      CurBase = SwapBytes32 (*Reg++);\r
      if (AddressCells > 1) {\r
        CurBase = (CurBase << 32) | SwapBytes32 (*Reg++);\r
      }\r
\r
      CurSize = SwapBytes32 (*Reg++);\r
      if (SizeCells > 1) {\r
        CurSize = (CurSize << 32) | SwapBytes32 (*Reg++);\r
      }\r
\r
      RegSize -= (AddressCells + SizeCells) * sizeof (UINT32);\r
\r
      Status = gDS->GetMemorySpaceDescriptor (CurBase, &GcdDescriptor);\r
      if (EFI_ERROR (Status)) {\r
        DEBUG ((\r
          DEBUG_WARN,\r
          "%a: Region 0x%lx - 0x%lx not found in the GCD memory space map\n",\r
          __FUNCTION__,\r
          CurBase,\r
          CurBase + CurSize - 1\r
          ));\r
        continue;\r
      }\r
\r
      if (GcdDescriptor.GcdMemoryType == EfiGcdMemoryTypeNonExistent) {\r
        Status = gDS->AddMemorySpace (\r
                        EfiGcdMemoryTypeSystemMemory,\r
                        CurBase,\r
                        CurSize,\r
                        EFI_MEMORY_WB\r
                        );\r
\r
        if (EFI_ERROR (Status)) {\r
          DEBUG ((\r
            DEBUG_ERROR,\r
            "%a: Failed to add System RAM @ 0x%lx - 0x%lx (%r)\n",\r
            __FUNCTION__,\r
            CurBase,\r
            CurBase + CurSize - 1,\r
            Status\r
            ));\r
          continue;\r
        }\r
\r
        Status = gDS->SetMemorySpaceAttributes (\r
                        CurBase,\r
                        CurSize,\r
                        EFI_MEMORY_WB\r
                        );\r
        if (EFI_ERROR (Status)) {\r
          DEBUG ((\r
            DEBUG_WARN,\r
            "%a: gDS->SetMemorySpaceAttributes() failed on region 0x%lx - 0x%lx (%r)\n",\r
            __FUNCTION__,\r
            CurBase,\r
            CurBase + CurSize - 1,\r
            Status\r
            ));\r
        }\r
\r
        //\r
        // Due to the ambiguous nature of the RO/XP GCD memory space attributes,\r
        // it is impossible to add a memory space with the XP attribute in a way\r
        // that does not result in the XP attribute being set on *all* UEFI\r
        // memory map entries that are carved from it, including code regions\r
        // that require executable permissions.\r
        //\r
        // So instead, we never set the RO/XP attributes in the GCD memory space\r
        // capabilities or attribute fields, and apply any protections directly\r
        // on the page table mappings by going through the cpu arch protocol.\r
        //\r
        Attributes = EFI_MEMORY_WB;\r
        if ((PcdGet64 (PcdDxeNxMemoryProtectionPolicy) &\r
             (1U << (UINT32)EfiConventionalMemory)) != 0)\r
        {\r
          Attributes |= EFI_MEMORY_XP;\r
        }\r
\r
        Status = Cpu->SetMemoryAttributes (Cpu, CurBase, CurSize, Attributes);\r
\r
        if (EFI_ERROR (Status)) {\r
          DEBUG ((\r
            DEBUG_ERROR,\r
            "%a: Failed to set System RAM @ 0x%lx - 0x%lx attribute (%r)\n",\r
            __FUNCTION__,\r
            CurBase,\r
            CurBase + CurSize - 1,\r
            Status\r
            ));\r
        } else {\r
          DEBUG ((\r
            DEBUG_INFO,\r
            "%a: Add System RAM @ 0x%lx - 0x%lx\n",\r
            __FUNCTION__,\r
            CurBase,\r
            CurBase + CurSize - 1\r
            ));\r
        }\r
      }\r
    }\r
  }\r
\r
  return EFI_SUCCESS;\r
}\r