1 /*- 2 * Copyright (c) 2000 Doug Rabson 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 29 #include <efi.h> 30 #include <eficonsctl.h> 31 #include <efilib.h> 32 #include <stand.h> 33 34 EFI_HANDLE IH; 35 EFI_SYSTEM_TABLE *ST; 36 EFI_BOOT_SERVICES *BS; 37 EFI_RUNTIME_SERVICES *RS; 38 39 static EFI_PHYSICAL_ADDRESS heap; 40 static UINTN heapsize; 41 42 static CHAR16 * 43 arg_skipsep(CHAR16 *argp) 44 { 45 46 while (*argp == ' ' || *argp == '\t' || *argp == '\n') 47 argp++; 48 return (argp); 49 } 50 51 static CHAR16 * 52 arg_skipword(CHAR16 *argp) 53 { 54 55 while (*argp && *argp != ' ' && *argp != '\t' && *argp != '\n') 56 argp++; 57 return (argp); 58 } 59 60 void * 61 efi_get_table(EFI_GUID *tbl) 62 { 63 EFI_GUID *id; 64 int i; 65 66 for (i = 0; i < ST->NumberOfTableEntries; i++) { 67 id = &ST->ConfigurationTable[i].VendorGuid; 68 if (!memcmp(id, tbl, sizeof(EFI_GUID))) 69 return (ST->ConfigurationTable[i].VendorTable); 70 } 71 return (NULL); 72 } 73 74 void exit(EFI_STATUS exit_code) 75 { 76 77 BS->FreePages(heap, EFI_SIZE_TO_PAGES(heapsize)); 78 BS->Exit(IH, exit_code, 0, NULL); 79 } 80 81 void 82 efi_main(EFI_HANDLE image_handle, EFI_SYSTEM_TABLE *system_table) 83 { 84 static EFI_GUID image_protocol = LOADED_IMAGE_PROTOCOL; 85 static EFI_GUID console_control_protocol = 86 EFI_CONSOLE_CONTROL_PROTOCOL_GUID; 87 EFI_CONSOLE_CONTROL_PROTOCOL *console_control = NULL; 88 EFI_LOADED_IMAGE *img; 89 CHAR16 *argp, *args, **argv; 90 EFI_STATUS status; 91 SIMPLE_TEXT_OUTPUT_INTERFACE *conout; 92 UINTN i, max_dim, best_mode, cols, rows; 93 int argc, addprog; 94 95 IH = image_handle; 96 ST = system_table; 97 BS = ST->BootServices; 98 RS = ST->RuntimeServices; 99 100 status = BS->LocateProtocol(&console_control_protocol, NULL, 101 (VOID **)&console_control); 102 if (status == EFI_SUCCESS) 103 (void)console_control->SetMode(console_control, 104 EfiConsoleControlScreenText); 105 106 conout = ST->ConOut; 107 max_dim = best_mode = 0; 108 for (i = 0; i <= conout->Mode->MaxMode ; i++) { 109 status = conout->QueryMode(conout, i, &cols, &rows); 110 if (EFI_ERROR(status)) 111 continue; 112 if (cols * rows > max_dim) { 113 max_dim = cols * rows; 114 best_mode = i; 115 } 116 } 117 if (max_dim > 0) 118 conout->SetMode(conout, best_mode); 119 120 heapsize = 64 * 1024 * 1024; 121 /* 4GB upper limit, try to leave some space from 1MB */ 122 heap = 0x0000000100000000; 123 status = BS->AllocatePages(AllocateMaxAddress, EfiLoaderData, 124 EFI_SIZE_TO_PAGES(heapsize), &heap); 125 if (status != EFI_SUCCESS) 126 BS->Exit(IH, status, 0, NULL); 127 128 setheap((void *)(uintptr_t)heap, (void *)(uintptr_t)(heap + heapsize)); 129 130 status = conout->QueryMode(conout, best_mode, &cols, &rows); 131 if (EFI_ERROR(status)) { 132 setenv("LINES", "24", 1); 133 setenv("COLUMNS", "80", 1); 134 } else { 135 char buf[8]; 136 snprintf(buf, sizeof (buf), "%u", (unsigned)rows); 137 setenv("LINES", buf, 1); 138 snprintf(buf, sizeof (buf), "%u", (unsigned)cols); 139 setenv("COLUMNS", buf, 1); 140 } 141 142 /* Use exit() from here on... */ 143 144 status = BS->HandleProtocol(IH, &image_protocol, (VOID**)&img); 145 if (status != EFI_SUCCESS) 146 exit(status); 147 148 /* 149 * Pre-process the (optional) load options. If the option string 150 * is given as an ASCII string, we use a poor man's ASCII to 151 * Unicode-16 translation. The size of the option string as given 152 * to us includes the terminating null character. We assume the 153 * string is an ASCII string if strlen() plus the terminating 154 * '\0' is less than LoadOptionsSize. Even if all Unicode-16 155 * characters have the upper 8 bits non-zero, the terminating 156 * null character will cause a one-off. 157 * If the string is already in Unicode-16, we make a copy so that 158 * we know we can always modify the string. 159 */ 160 if (img->LoadOptionsSize > 0 && img->LoadOptions != NULL) { 161 if (img->LoadOptionsSize == strlen(img->LoadOptions) + 1) { 162 args = malloc(img->LoadOptionsSize << 1); 163 for (argc = 0; argc < img->LoadOptionsSize; argc++) 164 args[argc] = ((char*)img->LoadOptions)[argc]; 165 } else { 166 args = malloc(img->LoadOptionsSize); 167 memcpy(args, img->LoadOptions, img->LoadOptionsSize); 168 } 169 } else 170 args = NULL; 171 172 /* 173 * Use a quick and dirty algorithm to build the argv vector. We 174 * first count the number of words. Then, after allocating the 175 * vector, we split the string up. We don't deal with quotes or 176 * other more advanced shell features. 177 * The EFI shell will pass the name of the image as the first 178 * word in the argument list. This does not happen if we're 179 * loaded by the boot manager. This is not so easy to figure 180 * out though. The ParentHandle is not always NULL, because 181 * there can be a function (=image) that will perform the task 182 * for the boot manager. 183 */ 184 /* Part 1: Figure out if we need to add our program name. */ 185 addprog = (args == NULL || img->ParentHandle == NULL || 186 img->FilePath == NULL) ? 1 : 0; 187 if (!addprog) { 188 addprog = 189 (DevicePathType(img->FilePath) != MEDIA_DEVICE_PATH || 190 DevicePathSubType(img->FilePath) != MEDIA_FILEPATH_DP || 191 DevicePathNodeLength(img->FilePath) <= 192 sizeof(FILEPATH_DEVICE_PATH)) ? 1 : 0; 193 if (!addprog) { 194 /* XXX todo. */ 195 } 196 } 197 /* Part 2: count words. */ 198 argc = (addprog) ? 1 : 0; 199 argp = args; 200 while (argp != NULL && *argp != 0) { 201 argp = arg_skipsep(argp); 202 if (*argp == 0) 203 break; 204 argc++; 205 argp = arg_skipword(argp); 206 } 207 /* Part 3: build vector. */ 208 argv = malloc((argc + 1) * sizeof(CHAR16*)); 209 argc = 0; 210 if (addprog) 211 argv[argc++] = (CHAR16 *)L"loader.efi"; 212 argp = args; 213 while (argp != NULL && *argp != 0) { 214 argp = arg_skipsep(argp); 215 if (*argp == 0) 216 break; 217 argv[argc++] = argp; 218 argp = arg_skipword(argp); 219 /* Terminate the words. */ 220 if (*argp != 0) 221 *argp++ = 0; 222 } 223 argv[argc] = NULL; 224 225 status = main(argc, argv); 226 exit(status); 227 } 228