diff options
| author | Michael Casadevall <michael.casadevall@linaro.org> | 2014-09-18 18:05:03 +0000 |
|---|---|---|
| committer | oliviermartin <oliviermartin@6f19259b-4bc3-4df7-8a09-765794883524> | 2014-09-18 18:05:03 +0000 |
| commit | a36d531f5d565e6cb5496ea53824e36487a227dd (patch) | |
| tree | 6a45629bae831ddda272da6c08678d71f8a98fd4 | |
| parent | ad10693231b9bc5ba7bab0f20ce1bf8d8f868c52 (diff) | |
| download | edk2-platforms-a36d531f5d565e6cb5496ea53824e36487a227dd.tar.xz | |
ArmPlatformPkg/ArmVirtualizationPkg: add ArmVirtualizationPlatformLib library
This is an implementation of ArmPlatformLib that discovers the size of system
DRAM from a device tree blob located at the address passed in
gArmTokenSpaceGuid.PcdDeviceTreeBaseAddress, which should equal the value in
gArmTokenSpaceGuid.PcdSystemMemoryBase.
As the device tree blob is passed in system DRAM, this library can only be used
if sufficient DRAM is available (>= 128 MB) and if not using shadowed NOR. The
reason for this is that it makes it easier to guarantee that such a device tree
blob at base of DRAM will not be clobbered before we get a chance to preserve it.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Michael Casadevall <michael.casadevall@linaro.org>
Acked-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-By: Olivier Martin <olivier.martin@arm.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16138 6f19259b-4bc3-4df7-8a09-765794883524
6 files changed, 609 insertions, 0 deletions
diff --git a/ArmPlatformPkg/ArmVirtualizationPkg/Library/ArmVirtualizationPlatformLib/AARCH64/VirtHelper.S b/ArmPlatformPkg/ArmVirtualizationPkg/Library/ArmVirtualizationPlatformLib/AARCH64/VirtHelper.S new file mode 100644 index 0000000000..14200fc17b --- /dev/null +++ b/ArmPlatformPkg/ArmVirtualizationPkg/Library/ArmVirtualizationPlatformLib/AARCH64/VirtHelper.S @@ -0,0 +1,86 @@ +#
+# Copyright (c) 2011-2013, ARM Limited. All rights reserved.
+#
+# This program and the accompanying materials
+# are licensed and made available under the terms and conditions of the BSD License
+# which accompanies this distribution. The full text of the license may be found at
+# http://opensource.org/licenses/bsd-license.php
+#
+# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+#
+#
+
+#include <AsmMacroIoLibV8.h>
+#include <Base.h>
+#include <Library/ArmLib.h>
+#include <Library/PcdLib.h>
+#include <AutoGen.h>
+
+.text
+.align 2
+
+GCC_ASM_EXPORT(ArmPlatformPeiBootAction)
+GCC_ASM_EXPORT(ArmPlatformIsPrimaryCore)
+GCC_ASM_EXPORT(ArmPlatformGetPrimaryCoreMpId)
+GCC_ASM_EXPORT(ArmPlatformGetCorePosition)
+GCC_ASM_EXPORT(ArmGetPhysAddrTop)
+
+GCC_ASM_IMPORT(_gPcd_FixedAtBuild_PcdArmPrimaryCore)
+GCC_ASM_IMPORT(_gPcd_FixedAtBuild_PcdArmPrimaryCoreMask)
+GCC_ASM_IMPORT(_gPcd_FixedAtBuild_PcdCoreCount)
+
+ASM_PFX(ArmPlatformPeiBootAction):
+ ret
+
+//UINTN
+//ArmPlatformGetPrimaryCoreMpId (
+// VOID
+// );
+ASM_PFX(ArmPlatformGetPrimaryCoreMpId):
+ LoadConstantToReg (_gPcd_FixedAtBuild_PcdArmPrimaryCore, x0)
+ ldrh w0, [x0]
+ ret
+
+//UINTN
+//ArmPlatformIsPrimaryCore (
+// IN UINTN MpId
+// );
+ASM_PFX(ArmPlatformIsPrimaryCore):
+ mov x0, #1
+ ret
+
+//UINTN
+//ArmPlatformGetCorePosition (
+// IN UINTN MpId
+// );
+// With this function: CorePos = (ClusterId * 4) + CoreId
+ASM_PFX(ArmPlatformGetCorePosition):
+ and x1, x0, #ARM_CORE_MASK
+ and x0, x0, #ARM_CLUSTER_MASK
+ add x0, x1, x0, LSR #6
+ ret
+
+//EFI_PHYSICAL_ADDRESS
+//GetPhysAddrTop (
+// VOID
+// );
+ASM_PFX(ArmGetPhysAddrTop):
+ mrs x0, id_aa64mmfr0_el1
+ adr x1, .LPARanges
+ and x0, x0, #7
+ ldrb w1, [x1, x0]
+ mov x0, #1
+ lsl x0, x0, x1
+ ret
+
+//
+// Bits 0..2 of the AA64MFR0_EL1 system register encode the size of the
+// physical address space support on this CPU:
+// 0 == 32 bits, 1 == 36 bits, etc etc
+// 6 and 7 are reserved
+//
+.LPARanges:
+ .byte 32, 36, 40, 42, 44, 48, -1, -1
+
+ASM_FUNCTION_REMOVE_IF_UNREFERENCED
diff --git a/ArmPlatformPkg/ArmVirtualizationPkg/Library/ArmVirtualizationPlatformLib/ARM/VirtHelper.S b/ArmPlatformPkg/ArmVirtualizationPkg/Library/ArmVirtualizationPlatformLib/ARM/VirtHelper.S new file mode 100644 index 0000000000..255f995987 --- /dev/null +++ b/ArmPlatformPkg/ArmVirtualizationPkg/Library/ArmVirtualizationPlatformLib/ARM/VirtHelper.S @@ -0,0 +1,74 @@ +#
+# Copyright (c) 2011-2013, ARM Limited. All rights reserved.
+# Copyright (c) 2014, Linaro Limited. All rights reserved.
+#
+# This program and the accompanying materials
+# are licensed and made available under the terms and conditions of the BSD License
+# which accompanies this distribution. The full text of the license may be found at
+# http://opensource.org/licenses/bsd-license.php
+#
+# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+#
+#
+
+#include <AsmMacroIoLib.h>
+#include <Base.h>
+#include <Library/ArmLib.h>
+#include <Library/PcdLib.h>
+#include <AutoGen.h>
+
+.text
+.align 2
+
+GCC_ASM_EXPORT(ArmPlatformPeiBootAction)
+GCC_ASM_EXPORT(ArmPlatformIsPrimaryCore)
+GCC_ASM_EXPORT(ArmPlatformGetPrimaryCoreMpId)
+GCC_ASM_EXPORT(ArmPlatformGetCorePosition)
+GCC_ASM_EXPORT(ArmGetPhysAddrTop)
+
+GCC_ASM_IMPORT(_gPcd_FixedAtBuild_PcdArmPrimaryCore)
+GCC_ASM_IMPORT(_gPcd_FixedAtBuild_PcdArmPrimaryCoreMask)
+GCC_ASM_IMPORT(_gPcd_FixedAtBuild_PcdCoreCount)
+
+ASM_PFX(ArmPlatformPeiBootAction):
+ bx lr
+
+//UINTN
+//ArmPlatformGetPrimaryCoreMpId (
+// VOID
+// );
+ASM_PFX(ArmPlatformGetPrimaryCoreMpId):
+ LoadConstantToReg (_gPcd_FixedAtBuild_PcdArmPrimaryCore, r0)
+ ldr r0, [r0]
+ bx lr
+
+//UINTN
+//ArmPlatformIsPrimaryCore (
+// IN UINTN MpId
+// );
+ASM_PFX(ArmPlatformIsPrimaryCore):
+ mov r0, #1
+ bx lr
+
+//UINTN
+//ArmPlatformGetCorePosition (
+// IN UINTN MpId
+// );
+// With this function: CorePos = (ClusterId * 4) + CoreId
+ASM_PFX(ArmPlatformGetCorePosition):
+ and r1, r0, #ARM_CORE_MASK
+ and r0, r0, #ARM_CLUSTER_MASK
+ add r0, r1, r0, LSR #6
+ bx lr
+
+//EFI_PHYSICAL_ADDRESS
+//GetPhysAddrTop (
+// VOID
+// );
+ASM_PFX(ArmGetPhysAddrTop):
+ mov r0, #0x00000000
+ mov r1, #0x10000
+ bx lr
+
+ASM_FUNCTION_REMOVE_IF_UNREFERENCED
diff --git a/ArmPlatformPkg/ArmVirtualizationPkg/Library/ArmVirtualizationPlatformLib/ARM/VirtHelper.asm b/ArmPlatformPkg/ArmVirtualizationPkg/Library/ArmVirtualizationPlatformLib/ARM/VirtHelper.asm new file mode 100644 index 0000000000..63f17f41b2 --- /dev/null +++ b/ArmPlatformPkg/ArmVirtualizationPkg/Library/ArmVirtualizationPlatformLib/ARM/VirtHelper.asm @@ -0,0 +1,78 @@ +#
+# Copyright (c) 2011-2014, ARM Limited. All rights reserved.
+# Copyright (c) 2014, Linaro Limited. All rights reserved.
+#
+# This program and the accompanying materials
+# are licensed and made available under the terms and conditions of the BSD License
+# which accompanies this distribution. The full text of the license may be found at
+# http://opensource.org/licenses/bsd-license.php
+#
+# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+#
+#
+
+#include <AsmMacroIoLib.h>
+#include <Base.h>
+#include <Library/ArmLib.h>
+#include <Library/PcdLib.h>
+#include <AutoGen.h>
+
+ INCLUDE AsmMacroIoLib.inc
+
+ EXPORT ArmPlatformPeiBootAction
+ EXPORT ArmPlatformIsPrimaryCore
+ EXPORT ArmPlatformGetPrimaryCoreMpId
+ EXPORT ArmPlatformGetCorePosition
+ EXPORT ArmGetPhysAddrTop
+
+ IMPORT _gPcd_FixedAtBuild_PcdArmPrimaryCore
+ IMPORT _gPcd_FixedAtBuild_PcdArmPrimaryCoreMask
+ IMPORT _gPcd_FixedAtBuild_PcdCoreCount
+
+ArmPlatformPeiBootAction FUNCTION
+ bx lr
+ ENDFUNC
+
+//UINTN
+//ArmPlatformGetPrimaryCoreMpId (
+// VOID
+// );
+ArmPlatformGetPrimaryCoreMpId FUNCTION
+ LoadConstantToReg (_gPcd_FixedAtBuild_PcdArmPrimaryCore, r0)
+ ldr r0, [r0]
+ bx lr
+ ENDFUNC
+
+//UINTN
+//ArmPlatformIsPrimaryCore (
+// IN UINTN MpId
+// );
+ArmPlatformIsPrimaryCore FUNCTION
+ mov r0, #1
+ bx lr
+ ENDFUNC
+
+//UINTN
+//ArmPlatformGetCorePosition (
+// IN UINTN MpId
+// );
+// With this function: CorePos = (ClusterId * 4) + CoreId
+ArmPlatformGetCorePosition FUNCTION
+ and r1, r0, #ARM_CORE_MASK
+ and r0, r0, #ARM_CLUSTER_MASK
+ add r0, r1, r0, LSR #6
+ bx lr
+ ENDFUNC
+
+//EFI_PHYSICAL_ADDRESS
+//GetPhysAddrTop (
+// VOID
+// );
+ArmGetPhysAddrTop FUNCTION
+ mov r0, #0x00000000
+ mov r1, #0x10000
+ bx lr
+ ENDFUNC
+
+ END
diff --git a/ArmPlatformPkg/ArmVirtualizationPkg/Library/ArmVirtualizationPlatformLib/ArmVirtualizationPlatformLib.inf b/ArmPlatformPkg/ArmVirtualizationPkg/Library/ArmVirtualizationPlatformLib/ArmVirtualizationPlatformLib.inf new file mode 100644 index 0000000000..57bebff13e --- /dev/null +++ b/ArmPlatformPkg/ArmVirtualizationPkg/Library/ArmVirtualizationPlatformLib/ArmVirtualizationPlatformLib.inf @@ -0,0 +1,67 @@ +#/* @file
+# Copyright (c) 2011-2014, ARM Limited. All rights reserved.
+# Copyright (c) 2014, Linaro Limited. All rights reserved.
+#
+# This program and the accompanying materials
+# are licensed and made available under the terms and conditions of the BSD License
+# which accompanies this distribution. The full text of the license may be found at
+# http://opensource.org/licenses/bsd-license.php
+#
+# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+#
+#*/
+
+[Defines]
+ INF_VERSION = 0x00010005
+ BASE_NAME = ArmVirtualizationPlatformLib
+ FILE_GUID = 00214cc1-06d1-45fe-9700-dca5726ad7bf
+ MODULE_TYPE = BASE
+ VERSION_STRING = 1.0
+ LIBRARY_CLASS = ArmPlatformLib|SEC PEIM
+
+[Packages]
+ MdePkg/MdePkg.dec
+ MdeModulePkg/MdeModulePkg.dec
+ EmbeddedPkg/EmbeddedPkg.dec
+ ArmPkg/ArmPkg.dec
+ ArmPlatformPkg/ArmPlatformPkg.dec
+ ArmPlatformPkg/ArmVirtualizationPkg/ArmVirtualizationPkg.dec
+
+[LibraryClasses]
+ IoLib
+ ArmLib
+ PrintLib
+ FdtLib
+ SerialPortLib
+ HobLib
+
+[Sources.common]
+ Virt.c
+ VirtMem.c
+
+[Sources.AARCH64]
+ AARCH64/VirtHelper.S | GCC
+
+[Sources.ARM]
+ ARM/VirtHelper.S | GCC
+ ARM/VirtHelper.asm | RVCT
+
+[FeaturePcd]
+ gEmbeddedTokenSpaceGuid.PcdCacheEnable
+ gArmPlatformTokenSpaceGuid.PcdSystemMemoryInitializeInSec
+
+[Pcd]
+ gArmTokenSpaceGuid.PcdSystemMemorySize
+
+[FixedPcd]
+ gArmVirtualizationTokenSpaceGuid.PcdDeviceTreeInitialBaseAddress
+ gArmPlatformTokenSpaceGuid.PcdCoreCount
+ gArmTokenSpaceGuid.PcdSystemMemoryBase
+ gArmTokenSpaceGuid.PcdArmPrimaryCoreMask
+ gArmTokenSpaceGuid.PcdArmPrimaryCore
+ gArmTokenSpaceGuid.PcdFdBaseAddress
+ gArmTokenSpaceGuid.PcdFdSize
+
+[Guids]
+ gEarlyPL011BaseAddressGuid
diff --git a/ArmPlatformPkg/ArmVirtualizationPkg/Library/ArmVirtualizationPlatformLib/Virt.c b/ArmPlatformPkg/ArmVirtualizationPkg/Library/ArmVirtualizationPlatformLib/Virt.c new file mode 100644 index 0000000000..7961b0524e --- /dev/null +++ b/ArmPlatformPkg/ArmVirtualizationPkg/Library/ArmVirtualizationPlatformLib/Virt.c @@ -0,0 +1,197 @@ +/** @file
+*
+* Copyright (c) 2011-2013, ARM Limited. All rights reserved.
+* Copyright (c) 2014, Linaro Limited. All rights reserved.
+* Copyright (c) 2014, Red Hat, Inc.
+*
+*
+* This program and the accompanying materials
+* are licensed and made available under the terms and conditions of the BSD License
+* which accompanies this distribution. The full text of the license may be found at
+* http://opensource.org/licenses/bsd-license.php
+*
+* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+*
+**/
+
+#include <Library/IoLib.h>
+#include <Library/ArmPlatformLib.h>
+#include <Library/DebugLib.h>
+#include <Library/PcdLib.h>
+#include <ArmPlatform.h>
+#include <libfdt.h>
+#include <Pi/PiBootMode.h>
+#include <Uefi/UefiBaseType.h>
+#include <Uefi/UefiMultiPhase.h>
+#include <Pi/PiHob.h>
+#include <Library/HobLib.h>
+#include <Guid/EarlyPL011BaseAddress.h>
+
+/**
+ Return the current Boot Mode
+
+ This function returns the boot reason on the platform
+
+ @return Return the current Boot Mode of the platform
+
+**/
+EFI_BOOT_MODE
+ArmPlatformGetBootMode (
+ VOID
+ )
+{
+ return BOOT_WITH_FULL_CONFIGURATION;
+}
+
+/**
+ This function is called by PrePeiCore, in the SEC phase.
+**/
+RETURN_STATUS
+ArmPlatformInitialize (
+ IN UINTN MpId
+ )
+{
+ //
+ // We are relying on ArmPlatformInitializeSystemMemory () being called from
+ // InitializeMemory (), which only occurs if the following feature is disabled
+ //
+ ASSERT (!FeaturePcdGet (PcdSystemMemoryInitializeInSec));
+ return RETURN_SUCCESS;
+}
+
+/**
+ Initialize the system (or sometimes called permanent) memory
+
+ This memory is generally represented by the DRAM.
+
+ This function is called from InitializeMemory() in MemoryInitPeim, in the PEI
+ phase.
+**/
+VOID
+ArmPlatformInitializeSystemMemory (
+ VOID
+ )
+{
+ VOID *DeviceTreeBase;
+ INT32 Node, Prev;
+ UINT64 NewBase;
+ UINT64 NewSize;
+ BOOLEAN HaveMemory, HaveUART;
+ UINT64 *HobData;
+ CONST CHAR8 *Type;
+ CONST CHAR8 *Compatible;
+ CONST CHAR8 *CompItem;
+ INT32 Len;
+ CONST UINT64 *RegProp;
+ UINT64 UartBase;
+
+ NewBase = 0;
+ NewSize = 0;
+
+ HaveMemory = FALSE;
+ HaveUART = FALSE;
+
+ HobData = BuildGuidHob (&gEarlyPL011BaseAddressGuid, sizeof *HobData);
+ ASSERT (HobData != NULL);
+ *HobData = 0;
+
+ DeviceTreeBase = (VOID *)(UINTN)FixedPcdGet64 (PcdDeviceTreeInitialBaseAddress);
+ ASSERT (DeviceTreeBase != NULL);
+
+ //
+ // Make sure we have a valid device tree blob
+ //
+ ASSERT (fdt_check_header (DeviceTreeBase) == 0);
+
+ //
+ // Look for a memory node
+ //
+ for (Prev = 0; !(HaveMemory && HaveUART); Prev = Node) {
+ Node = fdt_next_node (DeviceTreeBase, Prev, NULL);
+ if (Node < 0) {
+ break;
+ }
+
+ //
+ // Check for memory node
+ //
+ Type = fdt_getprop (DeviceTreeBase, Node, "device_type", &Len);
+ if (Type && AsciiStrnCmp (Type, "memory", Len) == 0) {
+ //
+ // Get the 'reg' property of this node. For now, we will assume
+ // two 8 byte quantities for base and size, respectively.
+ //
+ RegProp = fdt_getprop (DeviceTreeBase, Node, "reg", &Len);
+ if (RegProp != 0 && Len == (2 * sizeof (UINT64))) {
+
+ NewBase = fdt64_to_cpu (ReadUnaligned64 (RegProp));
+ NewSize = fdt64_to_cpu (ReadUnaligned64 (RegProp + 1));
+
+ //
+ // Make sure the start of DRAM matches our expectation
+ //
+ ASSERT (FixedPcdGet64 (PcdSystemMemoryBase) == NewBase);
+ PcdSet64 (PcdSystemMemorySize, NewSize);
+
+ DEBUG ((EFI_D_INFO, "%a: System RAM @ 0x%lx - 0x%lx\n",
+ __FUNCTION__, NewBase, NewBase + NewSize - 1));
+ } else {
+ DEBUG ((EFI_D_ERROR, "%a: Failed to parse FDT memory node\n",
+ __FUNCTION__));
+ }
+ HaveMemory = TRUE;
+ continue;
+ }
+
+ //
+ // Check for UART node
+ //
+ Compatible = fdt_getprop (DeviceTreeBase, Node, "compatible", &Len);
+
+ //
+ // Iterate over the NULL-separated items in the compatible string
+ //
+ for (CompItem = Compatible; CompItem != NULL && CompItem < Compatible + Len;
+ CompItem += 1 + AsciiStrLen (CompItem)) {
+
+ if (AsciiStrCmp (CompItem, "arm,pl011") == 0) {
+ RegProp = fdt_getprop (DeviceTreeBase, Node, "reg", &Len);
+ ASSERT (Len == 16);
+
+ UartBase = fdt64_to_cpu (ReadUnaligned64 (RegProp));
+
+ DEBUG ((EFI_D_INFO, "%a: PL011 UART @ 0x%lx\n", __FUNCTION__, UartBase));
+
+ *HobData = UartBase;
+
+ HaveUART = TRUE;
+ continue;
+ }
+ }
+ }
+
+ //
+ // We need to make sure that the machine we are running on has at least
+ // 128 MB of memory configured, and is currently executing this binary from
+ // NOR flash. This prevents a device tree image in DRAM from getting
+ // clobbered when our caller installs permanent PEI RAM, before we have a
+ // chance of marking its location as reserved or copy it to a freshly
+ // allocated block in the permanent PEI RAM in the platform PEIM.
+ //
+ ASSERT (NewSize >= SIZE_128MB);
+ ASSERT (
+ (((UINT64)PcdGet32 (PcdFdBaseAddress) +
+ (UINT64)PcdGet32 (PcdFdSize)) <= NewBase) ||
+ ((UINT64)PcdGet32 (PcdFdBaseAddress) >= (NewBase + NewSize)));
+}
+
+VOID
+ArmPlatformGetPlatformPpiList (
+ OUT UINTN *PpiListSize,
+ OUT EFI_PEI_PPI_DESCRIPTOR **PpiList
+ )
+{
+ *PpiListSize = 0;
+ *PpiList = NULL;
+}
diff --git a/ArmPlatformPkg/ArmVirtualizationPkg/Library/ArmVirtualizationPlatformLib/VirtMem.c b/ArmPlatformPkg/ArmVirtualizationPkg/Library/ArmVirtualizationPlatformLib/VirtMem.c new file mode 100644 index 0000000000..d5d288fb1b --- /dev/null +++ b/ArmPlatformPkg/ArmVirtualizationPkg/Library/ArmVirtualizationPlatformLib/VirtMem.c @@ -0,0 +1,107 @@ +/** @file
+*
+* Copyright (c) 2014, Linaro Limited. All rights reserved.
+*
+* This program and the accompanying materials
+* are licensed and made available under the terms and conditions of the BSD License
+* which accompanies this distribution. The full text of the license may be found at
+* http://opensource.org/licenses/bsd-license.php
+*
+* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+*
+**/
+
+#include <Library/ArmPlatformLib.h>
+#include <Library/DebugLib.h>
+#include <Library/BaseMemoryLib.h>
+#include <Library/PcdLib.h>
+#include <Library/IoLib.h>
+#include <Library/MemoryAllocationLib.h>
+#include <Library/ArmPlatformGlobalVariableLib.h>
+#include <ArmPlatform.h>
+
+// Number of Virtual Memory Map Descriptors
+#define MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS 4
+
+// DDR attributes
+#define DDR_ATTRIBUTES_CACHED ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK
+#define DDR_ATTRIBUTES_UNCACHED ARM_MEMORY_REGION_ATTRIBUTE_UNCACHED_UNBUFFERED
+
+EFI_PHYSICAL_ADDRESS
+ArmGetPhysAddrTop (
+ VOID
+ );
+
+/**
+ Return the Virtual Memory Map of your platform
+
+ This Virtual Memory Map is used by MemoryInitPei Module to initialize the MMU
+ on your platform.
+
+ @param[out] VirtualMemoryMap Array of ARM_MEMORY_REGION_DESCRIPTOR
+ describing a Physical-to-Virtual Memory
+ mapping. This array must be ended by a
+ zero-filled entry
+
+**/
+VOID
+ArmPlatformGetVirtualMemoryMap (
+ IN ARM_MEMORY_REGION_DESCRIPTOR** VirtualMemoryMap
+ )
+{
+ ARM_MEMORY_REGION_ATTRIBUTES CacheAttributes;
+ ARM_MEMORY_REGION_DESCRIPTOR *VirtualMemoryTable;
+
+ ASSERT (VirtualMemoryMap != NULL);
+
+ VirtualMemoryTable = AllocatePages (
+ EFI_SIZE_TO_PAGES (
+ sizeof (ARM_MEMORY_REGION_DESCRIPTOR)
+ * MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS
+ )
+ );
+
+ if (VirtualMemoryTable == NULL) {
+ DEBUG ((EFI_D_ERROR, "%a: Error: Failed AllocatePages()\n", __FUNCTION__));
+ return;
+ }
+
+ if (FeaturePcdGet (PcdCacheEnable) == TRUE) {
+ CacheAttributes = DDR_ATTRIBUTES_CACHED;
+ } else {
+ CacheAttributes = DDR_ATTRIBUTES_UNCACHED;
+ }
+
+ // System DRAM
+ VirtualMemoryTable[0].PhysicalBase = PcdGet64 (PcdSystemMemoryBase);
+ VirtualMemoryTable[0].VirtualBase = VirtualMemoryTable[0].PhysicalBase;
+ VirtualMemoryTable[0].Length = PcdGet64 (PcdSystemMemorySize);
+ VirtualMemoryTable[0].Attributes = CacheAttributes;
+
+ DEBUG ((EFI_D_INFO, "%a: Dumping System DRAM Memory Map:\n"
+ "\tPhysicalBase: 0x%lX\n"
+ "\tVirtualBase: 0x%lX\n"
+ "\tLength: 0x%lX\n",
+ __FUNCTION__,
+ VirtualMemoryTable[0].PhysicalBase,
+ VirtualMemoryTable[0].VirtualBase,
+ VirtualMemoryTable[0].Length));
+
+ // Peripheral space before DRAM
+ VirtualMemoryTable[1].PhysicalBase = 0x0;
+ VirtualMemoryTable[1].VirtualBase = 0x0;
+ VirtualMemoryTable[1].Length = VirtualMemoryTable[0].PhysicalBase;
+ VirtualMemoryTable[1].Attributes = ARM_MEMORY_REGION_ATTRIBUTE_DEVICE;
+
+ // Peripheral space after DRAM
+ VirtualMemoryTable[2].PhysicalBase = VirtualMemoryTable[0].Length + VirtualMemoryTable[1].Length;
+ VirtualMemoryTable[2].VirtualBase = VirtualMemoryTable[2].PhysicalBase;
+ VirtualMemoryTable[2].Length = ArmGetPhysAddrTop () - VirtualMemoryTable[2].PhysicalBase;
+ VirtualMemoryTable[2].Attributes = ARM_MEMORY_REGION_ATTRIBUTE_DEVICE;
+
+ // End of Table
+ ZeroMem (&VirtualMemoryTable[3], sizeof (ARM_MEMORY_REGION_DESCRIPTOR));
+
+ *VirtualMemoryMap = VirtualMemoryTable;
+}
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