3 * Copyright (c) 2014, Linaro Limited. All rights reserved.
5 * This program and the accompanying materials
6 * are licensed and made available under the terms and conditions of the BSD License
7 * which accompanies this distribution. The full text of the license may be found at
8 * http://opensource.org/licenses/bsd-license.php
10 * THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
15 #include <Library/ArmPlatformLib.h>
16 #include <Library/DebugLib.h>
17 #include <Library/BaseMemoryLib.h>
18 #include <Library/PcdLib.h>
19 #include <Library/IoLib.h>
20 #include <Library/MemoryAllocationLib.h>
22 // Number of Virtual Memory Map Descriptors
23 #define MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS 5
26 #define DDR_ATTRIBUTES_CACHED ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK
27 #define DDR_ATTRIBUTES_UNCACHED ARM_MEMORY_REGION_ATTRIBUTE_UNCACHED_UNBUFFERED
35 Return the Virtual Memory Map of your platform
37 This Virtual Memory Map is used by MemoryInitPei Module to initialize the MMU
40 @param[out] VirtualMemoryMap Array of ARM_MEMORY_REGION_DESCRIPTOR
41 describing a Physical-to-Virtual Memory
42 mapping. This array must be ended by a
47 ArmPlatformGetVirtualMemoryMap (
48 IN ARM_MEMORY_REGION_DESCRIPTOR
** VirtualMemoryMap
51 ARM_MEMORY_REGION_DESCRIPTOR
*VirtualMemoryTable
;
53 ASSERT (VirtualMemoryMap
!= NULL
);
55 VirtualMemoryTable
= AllocatePages (
57 sizeof (ARM_MEMORY_REGION_DESCRIPTOR
)
58 * MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS
62 if (VirtualMemoryTable
== NULL
) {
63 DEBUG ((EFI_D_ERROR
, "%a: Error: Failed AllocatePages()\n", __FUNCTION__
));
68 VirtualMemoryTable
[0].PhysicalBase
= PcdGet64 (PcdSystemMemoryBase
);
69 VirtualMemoryTable
[0].VirtualBase
= VirtualMemoryTable
[0].PhysicalBase
;
70 VirtualMemoryTable
[0].Length
= PcdGet64 (PcdSystemMemorySize
);
71 VirtualMemoryTable
[0].Attributes
= DDR_ATTRIBUTES_CACHED
;
73 DEBUG ((EFI_D_INFO
, "%a: Dumping System DRAM Memory Map:\n"
74 "\tPhysicalBase: 0x%lX\n"
75 "\tVirtualBase: 0x%lX\n"
78 VirtualMemoryTable
[0].PhysicalBase
,
79 VirtualMemoryTable
[0].VirtualBase
,
80 VirtualMemoryTable
[0].Length
));
82 // Peripheral space before DRAM
83 VirtualMemoryTable
[1].PhysicalBase
= 0x0;
84 VirtualMemoryTable
[1].VirtualBase
= 0x0;
85 VirtualMemoryTable
[1].Length
= VirtualMemoryTable
[0].PhysicalBase
;
86 VirtualMemoryTable
[1].Attributes
= ARM_MEMORY_REGION_ATTRIBUTE_DEVICE
;
88 // Peripheral space after DRAM
89 VirtualMemoryTable
[2].PhysicalBase
= VirtualMemoryTable
[0].Length
+ VirtualMemoryTable
[1].Length
;
90 VirtualMemoryTable
[2].VirtualBase
= VirtualMemoryTable
[2].PhysicalBase
;
91 VirtualMemoryTable
[2].Length
= MIN (1ULL << FixedPcdGet8 (PcdPrePiCpuMemorySize
),
92 ArmGetPhysAddrTop ()) -
93 VirtualMemoryTable
[2].PhysicalBase
;
94 VirtualMemoryTable
[2].Attributes
= ARM_MEMORY_REGION_ATTRIBUTE_DEVICE
;
96 // Remap the FD region as normal executable memory
97 VirtualMemoryTable
[3].PhysicalBase
= PcdGet64 (PcdFdBaseAddress
);
98 VirtualMemoryTable
[3].VirtualBase
= VirtualMemoryTable
[3].PhysicalBase
;
99 VirtualMemoryTable
[3].Length
= FixedPcdGet32 (PcdFdSize
);
100 VirtualMemoryTable
[3].Attributes
= DDR_ATTRIBUTES_CACHED
;
103 ZeroMem (&VirtualMemoryTable
[4], sizeof (ARM_MEMORY_REGION_DESCRIPTOR
));
105 *VirtualMemoryMap
= VirtualMemoryTable
;