OvmfPkg/RiscVVirt/Sec/SecMain.c

   1 /** @file
   2   RISC-V SEC phase module for Qemu Virt.
   3
   4   Copyright (c) 2008 - 2015, Intel Corporation. All rights reserved.<BR>
   5   Copyright (c) 2022, Ventana Micro Systems Inc. All rights reserved.<BR>
   6
   7   SPDX-License-Identifier: BSD-2-Clause-Patent
   8
   9 **/
  10
  11 #include "SecMain.h"
  12
  13 STATIC
  14 EFI_STATUS
  15 EFIAPI
  16 SecInitializePlatform (
  17   VOID
  18   )
  19 {
  20   EFI_STATUS  Status;
  21
  22   MemoryPeimInitialization ();
  23
  24   CpuPeimInitialization ();
  25
  26   // Set the Boot Mode
  27   SetBootMode (BOOT_WITH_FULL_CONFIGURATION);
  28
  29   Status = PlatformPeimInitialization ();
  30   ASSERT_EFI_ERROR (Status);
  31
  32   return EFI_SUCCESS;
  33 }
  34
  35 /**
  36
  37   Entry point to the C language phase of SEC. After the SEC assembly
  38   code has initialized some temporary memory and set up the stack,
  39   the control is transferred to this function.
  40
  41
  42   @param[in]  BootHartId         Hardware thread ID of boot hart.
  43   @param[in]  DeviceTreeAddress  Pointer to Device Tree (DTB)
  44 **/
  45 VOID
  46 NORETURN
  47 EFIAPI
  48 SecStartup (
  49   IN  UINTN  BootHartId,
  50   IN  VOID   *DeviceTreeAddress
  51   )
  52 {
  53   EFI_HOB_HANDOFF_INFO_TABLE  *HobList;
  54   EFI_RISCV_FIRMWARE_CONTEXT  FirmwareContext;
  55   EFI_STATUS                  Status;
  56   UINT64                      UefiMemoryBase;
  57   UINT64                      StackBase;
  58   UINT32                      StackSize;
  59
  60   //
  61   // Report Status Code to indicate entering SEC core
  62   //
  63   DEBUG ((
  64     DEBUG_INFO,
  65     "%a() BootHartId: 0x%x, DeviceTreeAddress=0x%x\n",
  66     __FUNCTION__,
  67     BootHartId,
  68     DeviceTreeAddress
  69     ));
  70
  71   FirmwareContext.BootHartId          = BootHartId;
  72   FirmwareContext.FlattenedDeviceTree = (UINT64)DeviceTreeAddress;
  73   SetFirmwareContextPointer (&FirmwareContext);
  74
  75   StackBase      = (UINT64)FixedPcdGet32 (PcdOvmfSecPeiTempRamBase);
  76   StackSize      = FixedPcdGet32 (PcdOvmfSecPeiTempRamSize);
  77   UefiMemoryBase = StackBase + StackSize - SIZE_32MB;
  78
  79   // Declare the PI/UEFI memory region
  80   HobList = HobConstructor (
  81               (VOID *)UefiMemoryBase,
  82               SIZE_32MB,
  83               (VOID *)UefiMemoryBase,
  84               (VOID *)StackBase // The top of the UEFI Memory is reserved for the stacks
  85               );
  86   PrePeiSetHobList (HobList);
  87
  88   SecInitializePlatform ();
  89
  90   BuildStackHob (StackBase, StackSize);
  91
  92   //
  93   // Process all libraries constructor function linked to SecMain.
  94   //
  95   ProcessLibraryConstructorList ();
  96
  97   // Assume the FV that contains the SEC (our code) also contains a compressed FV.
  98   Status = DecompressFirstFv ();
  99   ASSERT_EFI_ERROR (Status);
 100
 101   // Load the DXE Core and transfer control to it
 102   Status = LoadDxeCoreFromFv (NULL, 0);
 103   ASSERT_EFI_ERROR (Status);
 104   //
 105   // Should not come here.
 106   //
 107   UNREACHABLE ();
 108 }