mirror of https://github.com/acidanthera/audk.git
110 lines
3.5 KiB
C
110 lines
3.5 KiB
C
/** @file
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* High memory node enumeration DXE driver for ARM Virtual Machines
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*
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* Copyright (c) 2015, Linaro Ltd. All rights reserved.
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*
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* This program and the accompanying materials are licensed and made available
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* under the terms and conditions of the BSD License which accompanies this
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* distribution. The full text of the license may be found at
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* http://opensource.org/licenses/bsd-license.php
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*
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* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR
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* IMPLIED.
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*
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**/
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#include <Library/BaseLib.h>
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#include <Library/UefiDriverEntryPoint.h>
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#include <Library/DebugLib.h>
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#include <Library/PcdLib.h>
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#include <Library/HobLib.h>
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#include <libfdt.h>
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#include <Library/DxeServicesTableLib.h>
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EFI_STATUS
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EFIAPI
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InitializeHighMemDxe (
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IN EFI_HANDLE ImageHandle,
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IN EFI_SYSTEM_TABLE *SystemTable
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)
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{
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VOID *Hob;
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VOID *DeviceTreeBase;
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INT32 Node, Prev;
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EFI_STATUS Status;
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CONST CHAR8 *Type;
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INT32 Len;
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CONST VOID *RegProp;
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UINT64 CurBase;
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UINT64 CurSize;
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Hob = GetFirstGuidHob(&gFdtHobGuid);
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if (Hob == NULL || GET_GUID_HOB_DATA_SIZE (Hob) != sizeof (UINT64)) {
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return EFI_NOT_FOUND;
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}
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DeviceTreeBase = (VOID *)(UINTN)*(UINT64 *)GET_GUID_HOB_DATA (Hob);
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if (fdt_check_header (DeviceTreeBase) != 0) {
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DEBUG ((EFI_D_ERROR, "%a: No DTB found @ 0x%p\n", __FUNCTION__,
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DeviceTreeBase));
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return EFI_NOT_FOUND;
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}
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DEBUG ((EFI_D_INFO, "%a: DTB @ 0x%p\n", __FUNCTION__, DeviceTreeBase));
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//
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// Check for memory node and add the memory spaces expect the lowest one
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//
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for (Prev = 0;; Prev = Node) {
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Node = fdt_next_node (DeviceTreeBase, Prev, NULL);
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if (Node < 0) {
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break;
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}
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Type = fdt_getprop (DeviceTreeBase, Node, "device_type", &Len);
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if (Type && AsciiStrnCmp (Type, "memory", Len) == 0) {
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//
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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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//
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RegProp = fdt_getprop (DeviceTreeBase, Node, "reg", &Len);
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if (RegProp != NULL && Len == (2 * sizeof (UINT64))) {
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CurBase = fdt64_to_cpu (((UINT64 *)RegProp)[0]);
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CurSize = fdt64_to_cpu (((UINT64 *)RegProp)[1]);
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if (FixedPcdGet64 (PcdSystemMemoryBase) != CurBase) {
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Status = gDS->AddMemorySpace (
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EfiGcdMemoryTypeSystemMemory,
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CurBase, CurSize,
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EFI_MEMORY_WB | EFI_MEMORY_WC |
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EFI_MEMORY_WT | EFI_MEMORY_UC);
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if (EFI_ERROR (Status)) {
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DEBUG ((EFI_D_ERROR,
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"%a: Failed to add System RAM @ 0x%lx - 0x%lx (%r)\n",
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__FUNCTION__, CurBase, CurBase + CurSize - 1, Status));
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continue;
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}
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Status = gDS->SetMemorySpaceAttributes (
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CurBase, CurSize,
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EFI_MEMORY_WB);
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if (EFI_ERROR (Status)) {
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DEBUG ((EFI_D_ERROR,
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"%a: Failed to set System RAM @ 0x%lx - 0x%lx attribute (%r)\n",
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__FUNCTION__, CurBase, CurBase + CurSize - 1, Status));
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} else {
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DEBUG ((EFI_D_INFO, "%a: Add System RAM @ 0x%lx - 0x%lx\n",
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__FUNCTION__, CurBase, CurBase + CurSize - 1));
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}
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}
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}
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}
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}
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return EFI_SUCCESS;
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}
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