| Greg Hartman | 76d05dc | 2016-11-23 15:51:27 -0800 | [diff] [blame] | 1 | |
| 2 | |
| 3 | /* |
| 4 | * Copyright (C) 2013 Jerry Hoemann <jerry.hoemann@hp.com> |
| 5 | * |
| 6 | * Application to allocate memory at EFI. Syntax of command |
| 7 | * mimics the EFI Boot Service "FreePages." |
| 8 | * |
| 9 | * See UEFI spec 2.3, Section 6.2. |
| 10 | * |
| 11 | |
| 12 | Example freeing a 5 page BS_Code setment at address: 0000000020000000 (hex) |
| 13 | |
| 14 | |
| 15 | FS1:\> memmap |
| 16 | Type Start End #pages Attributes |
| 17 | BS_Code 0000000000000000-0000000000000FFF 0000000000000001 000000000000000F |
| 18 | Available 0000000000001000-000000000008DFFF 000000000000008D 000000000000000F |
| 19 | Reserved 000000000008E000-000000000008FFFF 0000000000000002 000000000000000F |
| 20 | Available 0000000000090000-000000000009FFFF 0000000000000010 000000000000000F |
| 21 | Available 0000000000100000-000000000FFFFFFF 000000000000FF00 000000000000000F |
| 22 | BS_Code 0000000010000000-0000000010061FFF 0000000000000062 000000000000000F |
| 23 | Available 0000000010062000-000000001FFFFFFF 000000000000FF9E 000000000000000F |
| 24 | BS_Code 0000000020000000-0000000020004FFF 0000000000000005 000000000000000F |
| 25 | Available 0000000020005000-000000005DDFFFFF 000000000003DDFB 000000000000000F |
| 26 | BS_Data 000000005DE00000-000000005DFFFFFF 0000000000000200 000000000000000F |
| 27 | Available 000000005E000000-000000006DE7CFFF 000000000000FE7D 000000000000000F |
| 28 | ACPI_NVS 000000006DE7D000-000000006EE7CFFF 0000000000001000 000000000000000F |
| 29 | BS_Data 000000006EE7D000-00000000709FBFFF 0000000000001B7F 000000000000000F |
| 30 | Available 00000000709FC000-00000000710E3FFF 00000000000006E8 000000000000000F |
| 31 | |
| 32 | |
| 33 | FS1:\> FreePages 0000000020000000 5 |
| 34 | FreePages: __PhysAddr__ __PgCnt__ |
| 35 | __PhysAddr__ 0... 3FFFFFFFFFFF |
| 36 | __PgCnt__ [0..F000000] |
| 37 | All numbers hex w/ no leading 0x |
| 38 | |
| 39 | FreePages(20000000,5) |
| 40 | |
| 41 | |
| 42 | |
| 43 | FS1:\> memmap |
| 44 | Type Start End #pages Attributes |
| 45 | BS_Code 0000000000000000-0000000000000FFF 0000000000000001 000000000000000F |
| 46 | Available 0000000000001000-000000000008DFFF 000000000000008D 000000000000000F |
| 47 | Reserved 000000000008E000-000000000008FFFF 0000000000000002 000000000000000F |
| 48 | Available 0000000000090000-000000000009FFFF 0000000000000010 000000000000000F |
| 49 | Available 0000000000100000-000000000FFFFFFF 000000000000FF00 000000000000000F |
| 50 | BS_Code 0000000010000000-0000000010061FFF 0000000000000062 000000000000000F |
| 51 | Available 0000000010062000-000000005DDFFFFF 000000000004DD9E 000000000000000F |
| 52 | BS_Data 000000005DE00000-000000005DFFFFFF 0000000000000200 000000000000000F |
| 53 | Available 000000005E000000-000000006DE7CFFF 000000000000FE7D 000000000000000F |
| 54 | ACPI_NVS 000000006DE7D000-000000006EE7CFFF 0000000000001000 000000000000000F |
| 55 | BS_Data 000000006EE7D000-00000000709FBFFF 0000000000001B7F 000000000000000F |
| 56 | Available 00000000709FC000-00000000710E3FFF 00000000000006E8 000000000000000F |
| 57 | |
| 58 | |
| 59 | */ |
| 60 | |
| 61 | #include <efi.h> |
| 62 | #include <efilib.h> |
| 63 | #include <argify.h> |
| 64 | |
| 65 | /* |
| 66 | * FreePages: __PhysAddr__ __PgCnt__ |
| 67 | * |
| 68 | */ |
| 69 | |
| 70 | #define MAX_NUM_PAGES 0x000000000F000000 |
| 71 | |
| 72 | #define MAX_ADDR ((1ULL << 46) - 1) |
| 73 | |
| 74 | #ifdef DEBUG |
| 75 | #undef DEBUG |
| 76 | #endif |
| 77 | #define DEBUG 0 |
| 78 | |
| 79 | |
| 80 | EFI_STATUS |
| 81 | efi_main (EFI_HANDLE image, EFI_SYSTEM_TABLE *systab) |
| 82 | { |
| 83 | |
| 84 | EFI_STATUS efi_status; |
| 85 | EFI_GUID LoadedImageProtocol = LOADED_IMAGE_PROTOCOL; |
| 86 | EFI_LOADED_IMAGE *info; |
| 87 | |
| 88 | CHAR16 arglist[MAX_ARGS+1] = {0}; |
| 89 | CHAR16 *argv[MAX_ARGS]; |
| 90 | INTN argc = 0; |
| 91 | INTN err = 0; |
| 92 | |
| 93 | INTN PgCnt = -1; |
| 94 | UINTN PhysAddr = 0; |
| 95 | |
| 96 | InitializeLib(image, systab); |
| 97 | |
| 98 | efi_status = uefi_call_wrapper( BS->HandleProtocol, 3, image, |
| 99 | &LoadedImageProtocol, &info); |
| 100 | |
| 101 | |
| 102 | Print(L"FreePages: __PhysAddr__ __PgCnt__\n"); |
| 103 | Print(L"__PhysAddr__ 0... %llx\n", MAX_ADDR); |
| 104 | Print(L"__PgCnt__ [0..%lx]\n", MAX_NUM_PAGES); |
| 105 | Print(L"All numbers hex w/ no leading 0x\n"); |
| 106 | Print(L"\n"); |
| 107 | |
| 108 | #if DEBUG |
| 109 | Print(L"%s\n", info->LoadOptions); |
| 110 | #endif |
| 111 | |
| 112 | |
| 113 | #if DEBUG |
| 114 | Print(L"Set up arglist\n"); |
| 115 | #endif |
| 116 | CopyMem(arglist, info->LoadOptions, info->LoadOptionsSize); |
| 117 | #if DEBUG |
| 118 | Print(L"arglist = <%s>\n", arglist); |
| 119 | #endif |
| 120 | |
| 121 | #if DEBUG |
| 122 | Print(L"Now try argify\n"); |
| 123 | #endif |
| 124 | argc = argify(arglist, info->LoadOptionsSize, argv); |
| 125 | #if DEBUG |
| 126 | Print(L"argc = %d\n", argc); |
| 127 | #endif |
| 128 | |
| 129 | #if DEBUG |
| 130 | for (c = 0; c < argc; c++ ) { |
| 131 | Print(L"argv[%d] = <%s>\n", c, argv[c]); |
| 132 | } |
| 133 | #endif |
| 134 | if (argc != 3) { |
| 135 | Print(L"Invalid argument count\n"); |
| 136 | return EFI_SUCCESS; |
| 137 | } |
| 138 | |
| 139 | PhysAddr = xtoi(argv[1]); |
| 140 | PgCnt = xtoi(argv[2]); |
| 141 | |
| 142 | if ( (PgCnt < 0) || (PgCnt > MAX_NUM_PAGES) ) { |
| 143 | Print(L"Inavlid PgCnt\n"); |
| 144 | err++; |
| 145 | } |
| 146 | if ( PhysAddr > MAX_ADDR ) { |
| 147 | Print(L"Inavlid Address\n"); |
| 148 | err++; |
| 149 | } |
| 150 | if ( err ) { |
| 151 | return EFI_SUCCESS; |
| 152 | } |
| 153 | |
| 154 | Print(L"FreePages(%lx,%d)\n", PhysAddr, PgCnt); |
| 155 | |
| 156 | efi_status = uefi_call_wrapper(BS->FreePages, 2, PhysAddr, PgCnt); |
| 157 | |
| 158 | if ( EFI_ERROR(efi_status) ) { |
| 159 | Print(L"Free Pages Failed: %d\n", efi_status); |
| 160 | return efi_status; |
| 161 | } |
| 162 | |
| 163 | return EFI_SUCCESS; |
| 164 | } |
