1 /** @file 2 * 3 * Copyright (c) 2014, Linaro Limited. All rights reserved. 4 * 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 9 * 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. 12 * 13 **/ 14 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> 21 #include <ArmPlatform.h> 22 23 // Number of Virtual Memory Map Descriptors 24 #define MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS 5 25 26 // DDR attributes 27 #define DDR_ATTRIBUTES_CACHED ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK 28 #define DDR_ATTRIBUTES_UNCACHED ARM_MEMORY_REGION_ATTRIBUTE_UNCACHED_UNBUFFERED 29 30 EFI_PHYSICAL_ADDRESS 31 ArmGetPhysAddrTop ( 32 VOID 33 ); 34 35 /** 36 Return the Virtual Memory Map of your platform 37 38 This Virtual Memory Map is used by MemoryInitPei Module to initialize the MMU 39 on your platform. 40 41 @param[out] VirtualMemoryMap Array of ARM_MEMORY_REGION_DESCRIPTOR 42 describing a Physical-to-Virtual Memory 43 mapping. This array must be ended by a 44 zero-filled entry 45 46 **/ 47 VOID 48 ArmPlatformGetVirtualMemoryMap ( 49 IN ARM_MEMORY_REGION_DESCRIPTOR** VirtualMemoryMap 50 ) 51 { 52 ARM_MEMORY_REGION_ATTRIBUTES CacheAttributes; 53 ARM_MEMORY_REGION_DESCRIPTOR *VirtualMemoryTable; 54 55 ASSERT (VirtualMemoryMap != NULL); 56 57 VirtualMemoryTable = AllocatePages ( 58 EFI_SIZE_TO_PAGES ( 59 sizeof (ARM_MEMORY_REGION_DESCRIPTOR) 60 * MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS 61 ) 62 ); 63 64 if (VirtualMemoryTable == NULL) { 65 DEBUG ((EFI_D_ERROR, "%a: Error: Failed AllocatePages()\n", __FUNCTION__)); 66 return; 67 } 68 69 if (FeaturePcdGet (PcdCacheEnable) == TRUE) { 70 CacheAttributes = DDR_ATTRIBUTES_CACHED; 71 } else { 72 CacheAttributes = DDR_ATTRIBUTES_UNCACHED; 73 } 74 75 // System DRAM 76 VirtualMemoryTable[0].PhysicalBase = PcdGet64 (PcdSystemMemoryBase); 77 VirtualMemoryTable[0].VirtualBase = VirtualMemoryTable[0].PhysicalBase; 78 VirtualMemoryTable[0].Length = PcdGet64 (PcdSystemMemorySize); 79 VirtualMemoryTable[0].Attributes = CacheAttributes; 80 81 DEBUG ((EFI_D_INFO, "%a: Dumping System DRAM Memory Map:\n" 82 "\tPhysicalBase: 0x%lX\n" 83 "\tVirtualBase: 0x%lX\n" 84 "\tLength: 0x%lX\n", 85 __FUNCTION__, 86 VirtualMemoryTable[0].PhysicalBase, 87 VirtualMemoryTable[0].VirtualBase, 88 VirtualMemoryTable[0].Length)); 89 90 // Peripheral space before DRAM 91 VirtualMemoryTable[1].PhysicalBase = 0x0; 92 VirtualMemoryTable[1].VirtualBase = 0x0; 93 VirtualMemoryTable[1].Length = VirtualMemoryTable[0].PhysicalBase; 94 VirtualMemoryTable[1].Attributes = ARM_MEMORY_REGION_ATTRIBUTE_DEVICE; 95 96 // Peripheral space after DRAM 97 VirtualMemoryTable[2].PhysicalBase = VirtualMemoryTable[0].Length + VirtualMemoryTable[1].Length; 98 VirtualMemoryTable[2].VirtualBase = VirtualMemoryTable[2].PhysicalBase; 99 VirtualMemoryTable[2].Length = MIN (1ULL << FixedPcdGet8 (PcdPrePiCpuMemorySize), 100 ArmGetPhysAddrTop ()) - 101 VirtualMemoryTable[2].PhysicalBase; 102 VirtualMemoryTable[2].Attributes = ARM_MEMORY_REGION_ATTRIBUTE_DEVICE; 103 104 // Remap the FD region as normal executable memory 105 VirtualMemoryTable[3].PhysicalBase = FixedPcdGet64 (PcdFdBaseAddress); 106 VirtualMemoryTable[3].VirtualBase = VirtualMemoryTable[3].PhysicalBase; 107 VirtualMemoryTable[3].Length = FixedPcdGet32 (PcdFdSize); 108 VirtualMemoryTable[3].Attributes = CacheAttributes; 109 110 // End of Table 111 ZeroMem (&VirtualMemoryTable[4], sizeof (ARM_MEMORY_REGION_DESCRIPTOR)); 112 113 *VirtualMemoryMap = VirtualMemoryTable; 114 } 115