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16#include <common.h>
17#include <asm/io.h>
18#include <asm/ptrace.h>
19#include <asm/zimage.h>
20#include <asm/byteorder.h>
21#include <asm/bootm.h>
22#include <asm/bootparam.h>
23#ifdef CONFIG_SYS_COREBOOT
24#include <asm/arch/timestamp.h>
25#endif
26#include <linux/compiler.h>
27
28DECLARE_GLOBAL_DATA_PTR;
29
30
31
32
33
34
35
36
37
38
39#define DEFAULT_SETUP_BASE 0x90000
40#define COMMAND_LINE_OFFSET 0x9000
41#define HEAP_END_OFFSET 0x8e00
42
43#define COMMAND_LINE_SIZE 2048
44
45static void build_command_line(char *command_line, int auto_boot)
46{
47 char *env_command_line;
48
49 command_line[0] = '\0';
50
51 env_command_line = env_get("bootargs");
52
53
54 if (!strstr(env_command_line, "console=")) {
55 if (!strcmp(env_get("stdout"), "serial")) {
56
57
58 sprintf(command_line, "console=ttyS0,%s ",
59 env_get("baudrate"));
60 }
61 }
62
63 if (auto_boot)
64 strcat(command_line, "auto ");
65
66 if (env_command_line)
67 strcat(command_line, env_command_line);
68
69 printf("Kernel command line: \"%s\"\n", command_line);
70}
71
72static int kernel_magic_ok(struct setup_header *hdr)
73{
74 if (KERNEL_MAGIC != hdr->boot_flag) {
75 printf("Error: Invalid Boot Flag "
76 "(found 0x%04x, expected 0x%04x)\n",
77 hdr->boot_flag, KERNEL_MAGIC);
78 return 0;
79 } else {
80 printf("Valid Boot Flag\n");
81 return 1;
82 }
83}
84
85static int get_boot_protocol(struct setup_header *hdr)
86{
87 if (hdr->header == KERNEL_V2_MAGIC) {
88 printf("Magic signature found\n");
89 return hdr->version;
90 } else {
91
92 printf("Magic signature not found\n");
93 return 0x0100;
94 }
95}
96
97struct boot_params *load_zimage(char *image, unsigned long kernel_size,
98 ulong *load_addressp)
99{
100 struct boot_params *setup_base;
101 int setup_size;
102 int bootproto;
103 int big_image;
104
105 struct boot_params *params = (struct boot_params *)image;
106 struct setup_header *hdr = ¶ms->hdr;
107
108
109 setup_base = (struct boot_params *)DEFAULT_SETUP_BASE;
110
111 if (!kernel_magic_ok(hdr))
112 return 0;
113
114
115 if (0 == hdr->setup_sects) {
116 printf("Setup Sectors = 0 (defaulting to 4)\n");
117 setup_size = 5 * 512;
118 } else {
119 setup_size = (hdr->setup_sects + 1) * 512;
120 }
121
122 printf("Setup Size = 0x%8.8lx\n", (ulong)setup_size);
123
124 if (setup_size > SETUP_MAX_SIZE)
125 printf("Error: Setup is too large (%d bytes)\n", setup_size);
126
127
128 bootproto = get_boot_protocol(hdr);
129
130 printf("Using boot protocol version %x.%02x\n",
131 (bootproto & 0xff00) >> 8, bootproto & 0xff);
132
133 if (bootproto >= 0x0200) {
134 if (hdr->setup_sects >= 15) {
135 printf("Linux kernel version %s\n",
136 (char *)params +
137 hdr->kernel_version + 0x200);
138 } else {
139 printf("Setup Sectors < 15 - "
140 "Cannot print kernel version.\n");
141 }
142 }
143
144
145 big_image = (bootproto >= 0x0200) &&
146 (hdr->loadflags & BIG_KERNEL_FLAG);
147
148
149 if (big_image)
150 *load_addressp = BZIMAGE_LOAD_ADDR;
151 else
152 *load_addressp = ZIMAGE_LOAD_ADDR;
153
154 printf("Building boot_params at 0x%8.8lx\n", (ulong)setup_base);
155 memset(setup_base, 0, sizeof(*setup_base));
156 setup_base->hdr = params->hdr;
157
158 if (bootproto >= 0x0204)
159 kernel_size = hdr->syssize * 16;
160 else
161 kernel_size -= setup_size;
162
163 if (bootproto == 0x0100) {
164
165
166
167
168 if ((ulong)setup_base != 0x90000) {
169
170 memmove((void *)0x90000, setup_base, setup_size);
171
172
173 memmove((void *)0x99000,
174 (u8 *)setup_base + COMMAND_LINE_OFFSET,
175 COMMAND_LINE_SIZE);
176
177
178 setup_base = (struct boot_params *)0x90000;
179 }
180
181
182 memset((u8 *)0x90000 + setup_size, 0,
183 SETUP_MAX_SIZE - setup_size);
184 }
185
186 if (big_image) {
187 if (kernel_size > BZIMAGE_MAX_SIZE) {
188 printf("Error: bzImage kernel too big! "
189 "(size: %ld, max: %d)\n",
190 kernel_size, BZIMAGE_MAX_SIZE);
191 return 0;
192 }
193 } else if ((kernel_size) > ZIMAGE_MAX_SIZE) {
194 printf("Error: zImage kernel too big! (size: %ld, max: %d)\n",
195 kernel_size, ZIMAGE_MAX_SIZE);
196 return 0;
197 }
198
199 printf("Loading %s at address %lx (%ld bytes)\n",
200 big_image ? "bzImage" : "zImage", *load_addressp, kernel_size);
201
202 memmove((void *)*load_addressp, image + setup_size, kernel_size);
203
204 return setup_base;
205}
206
207int setup_zimage(struct boot_params *setup_base, char *cmd_line, int auto_boot,
208 unsigned long initrd_addr, unsigned long initrd_size)
209{
210 struct setup_header *hdr = &setup_base->hdr;
211 int bootproto = get_boot_protocol(hdr);
212
213 setup_base->e820_entries = install_e820_map(
214 ARRAY_SIZE(setup_base->e820_map), setup_base->e820_map);
215
216 if (bootproto == 0x0100) {
217 setup_base->screen_info.cl_magic = COMMAND_LINE_MAGIC;
218 setup_base->screen_info.cl_offset = COMMAND_LINE_OFFSET;
219 }
220 if (bootproto >= 0x0200) {
221 hdr->type_of_loader = 8;
222
223 if (initrd_addr) {
224 printf("Initial RAM disk at linear address "
225 "0x%08lx, size %ld bytes\n",
226 initrd_addr, initrd_size);
227
228 hdr->ramdisk_image = initrd_addr;
229 hdr->ramdisk_size = initrd_size;
230 }
231 }
232
233 if (bootproto >= 0x0201) {
234 hdr->heap_end_ptr = HEAP_END_OFFSET;
235 hdr->loadflags |= HEAP_FLAG;
236 }
237
238 if (cmd_line) {
239 if (bootproto >= 0x0202) {
240 hdr->cmd_line_ptr = (uintptr_t)cmd_line;
241 } else if (bootproto >= 0x0200) {
242 setup_base->screen_info.cl_magic = COMMAND_LINE_MAGIC;
243 setup_base->screen_info.cl_offset =
244 (uintptr_t)cmd_line - (uintptr_t)setup_base;
245
246 hdr->setup_move_size = 0x9100;
247 }
248
249#if defined(CONFIG_INTEL_MID)
250 hdr->hardware_subarch = X86_SUBARCH_INTEL_MID;
251#endif
252
253
254 build_command_line(cmd_line, auto_boot);
255 }
256
257 setup_video(&setup_base->screen_info);
258
259 return 0;
260}
261
262void setup_pcat_compatibility(void)
263 __attribute__((weak, alias("__setup_pcat_compatibility")));
264
265void __setup_pcat_compatibility(void)
266{
267}
268
269int do_zboot(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
270{
271 struct boot_params *base_ptr;
272 void *bzImage_addr = NULL;
273 ulong load_address;
274 char *s;
275 ulong bzImage_size = 0;
276 ulong initrd_addr = 0;
277 ulong initrd_size = 0;
278
279 disable_interrupts();
280
281
282 setup_pcat_compatibility();
283
284 if (argc >= 2) {
285
286 s = argv[1];
287 } else {
288 s = env_get("fileaddr");
289 }
290
291 if (s)
292 bzImage_addr = (void *)simple_strtoul(s, NULL, 16);
293
294 if (argc >= 3) {
295
296 bzImage_size = simple_strtoul(argv[2], NULL, 16);
297 }
298
299 if (argc >= 4)
300 initrd_addr = simple_strtoul(argv[3], NULL, 16);
301 if (argc >= 5)
302 initrd_size = simple_strtoul(argv[4], NULL, 16);
303
304
305 base_ptr = load_zimage(bzImage_addr, bzImage_size, &load_address);
306
307 if (!base_ptr) {
308 puts("## Kernel loading failed ...\n");
309 return -1;
310 }
311 if (setup_zimage(base_ptr, (char *)base_ptr + COMMAND_LINE_OFFSET,
312 0, initrd_addr, initrd_size)) {
313 puts("Setting up boot parameters failed ...\n");
314 return -1;
315 }
316
317
318 return boot_linux_kernel((ulong)base_ptr, load_address, false);
319}
320
321U_BOOT_CMD(
322 zboot, 5, 0, do_zboot,
323 "Boot bzImage",
324 "[addr] [size] [initrd addr] [initrd size]\n"
325 " addr - The optional starting address of the bzimage.\n"
326 " If not set it defaults to the environment\n"
327 " variable \"fileaddr\".\n"
328 " size - The optional size of the bzimage. Defaults to\n"
329 " zero.\n"
330 " initrd addr - The address of the initrd image to use, if any.\n"
331 " initrd size - The size of the initrd image to use, if any.\n"
332);
333
