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/** @file
Copyright (c) 2014-2017, Linaro Limited. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#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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