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/** @file
Copyright (c) 2014-2017, 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 <Base.h>
#include <Library/ArmLib.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
//
// mach-virt's core peripherals such as the UART, the GIC and the RTC are
// all mapped in the 'miscellaneous device I/O' region, which we just map
// in its entirety rather than device by device. Note that it does not
// cover any of the NOR flash banks or PCI resource windows.
//
#define MACH_VIRT_PERIPH_BASE 0x08000000
#define MACH_VIRT_PERIPH_SIZE SIZE_128MB
/**
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. The allocated memory
will not be freed.
**/
VOID
ArmVirtGetMemoryMap (
OUT ARM_MEMORY_REGION_DESCRIPTOR **VirtualMemoryMap
)
{
ARM_MEMORY_REGION_DESCRIPTOR *VirtualMemoryTable;
ASSERT (VirtualMemoryMap != NULL);
VirtualMemoryTable = AllocatePool (sizeof (ARM_MEMORY_REGION_DESCRIPTOR) *
MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS);
if (VirtualMemoryTable == NULL) {
DEBUG ((DEBUG_ERROR, "%a: Error: Failed AllocatePool()\n", __FUNCTION__));
return;
}
// System DRAM
VirtualMemoryTable[0].PhysicalBase = PcdGet64 (PcdSystemMemoryBase);
VirtualMemoryTable[0].VirtualBase = VirtualMemoryTable[0].PhysicalBase;
VirtualMemoryTable[0].Length = PcdGet64 (PcdSystemMemorySize);
VirtualMemoryTable[0].Attributes = ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK;
DEBUG ((DEBUG_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));
// Memory mapped peripherals (UART, RTC, GIC, virtio-mmio, etc)
VirtualMemoryTable[1].PhysicalBase = MACH_VIRT_PERIPH_BASE;
VirtualMemoryTable[1].VirtualBase = MACH_VIRT_PERIPH_BASE;
VirtualMemoryTable[1].Length = MACH_VIRT_PERIPH_SIZE;
VirtualMemoryTable[1].Attributes = ARM_MEMORY_REGION_ATTRIBUTE_DEVICE;
// Map the FV region as normal executable memory
VirtualMemoryTable[2].PhysicalBase = PcdGet64 (PcdFvBaseAddress);
VirtualMemoryTable[2].VirtualBase = VirtualMemoryTable[2].PhysicalBase;
VirtualMemoryTable[2].Length = FixedPcdGet32 (PcdFvSize);
VirtualMemoryTable[2].Attributes = ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK;
// End of Table
ZeroMem (&VirtualMemoryTable[3], sizeof (ARM_MEMORY_REGION_DESCRIPTOR));
*VirtualMemoryMap = VirtualMemoryTable;
}
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