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 2 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_DESCRIPTOR *VirtualMemoryTable; 53 54 ASSERT (VirtualMemoryMap != NULL); 55 56 VirtualMemoryTable = AllocatePages ( 57 EFI_SIZE_TO_PAGES ( 58 sizeof (ARM_MEMORY_REGION_DESCRIPTOR) 59 * MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS 60 ) 61 ); 62 63 if (VirtualMemoryTable == NULL) { 64 DEBUG ((EFI_D_ERROR, "%a: Error: Failed AllocatePages()\n", __FUNCTION__)); 65 return; 66 } 67 68 // 69 // Map the entire physical memory space as cached. The only device 70 // we care about is the GIC, which will be stage 2 mapped as a device 71 // by the hypervisor, which will override the cached mapping we install 72 // here. 73 // 74 VirtualMemoryTable[0].PhysicalBase = 0x0; 75 VirtualMemoryTable[0].VirtualBase = 0x0; 76 VirtualMemoryTable[0].Length = ArmGetPhysAddrTop (); 77 VirtualMemoryTable[0].Attributes = DDR_ATTRIBUTES_CACHED; 78 79 // End of Table 80 ZeroMem (&VirtualMemoryTable[1], sizeof (ARM_MEMORY_REGION_DESCRIPTOR)); 81 82 *VirtualMemoryMap = VirtualMemoryTable; 83 } 84
