blob: aa483b6d909a1ce882293693e67f28d09071ff66 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
|
/** @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/BaseLib.h>
#include <Library/DebugLib.h>
STATIC ARM_MEMORY_REGION_DESCRIPTOR mVirtualMemoryTable[2];
/**
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
EFIAPI
ArmVirtGetMemoryMap (
OUT ARM_MEMORY_REGION_DESCRIPTOR **VirtualMemoryMap
)
{
EFI_PHYSICAL_ADDRESS TopOfAddressSpace;
ASSERT (VirtualMemoryMap != NULL);
TopOfAddressSpace = LShiftU64 (1ULL, ArmGetPhysicalAddressBits ());
//
// Map the entire physical memory space as cached. The only device
// we care about is the GIC, which will be stage 2 mapped as a device
// by the hypervisor, overriding the cached mapping we install here.
//
mVirtualMemoryTable[0].PhysicalBase = 0x0;
mVirtualMemoryTable[0].VirtualBase = 0x0;
mVirtualMemoryTable[0].Length = TopOfAddressSpace;
mVirtualMemoryTable[0].Attributes = ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK;
mVirtualMemoryTable[1].PhysicalBase = 0x0;
mVirtualMemoryTable[1].VirtualBase = 0x0;
mVirtualMemoryTable[1].Length = 0x0;
mVirtualMemoryTable[1].Attributes = 0x0;
*VirtualMemoryMap = mVirtualMemoryTable;
}
|
