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 *
arg_skipsep(CHAR16 * argp)43 arg_skipsep(CHAR16 *argp)
44 {
45
46 while (*argp == ' ' || *argp == '\t' || *argp == '\n')
47 argp++;
48 return (argp);
49 }
50
51 static CHAR16 *
arg_skipword(CHAR16 * argp)52 arg_skipword(CHAR16 *argp)
53 {
54
55 while (*argp && *argp != ' ' && *argp != '\t' && *argp != '\n')
56 argp++;
57 return (argp);
58 }
59
60 void *
efi_get_table(EFI_GUID * tbl)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
exit(EFI_STATUS exit_code)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
efi_main(EFI_HANDLE image_handle,EFI_SYSTEM_TABLE * system_table)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