2 * Corscience GmbH & Co. KG - Simon Schwarz <schwarz@corscience.de>
3 * - Added prep subcommand support
4 * - Reorganized source - modeled after powerpc version
7 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
8 * Marius Groeger <mgroeger@sysgo.de>
10 * Copyright (C) 2001 Erik Mouw (J.A.K.Mouw@its.tudelft.nl)
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
31 #include <u-boot/zlib.h>
32 #include <asm/byteorder.h>
35 #include <fdt_support.h>
36 #include <asm/bootm.h>
38 DECLARE_GLOBAL_DATA_PTR;
40 #if defined(CONFIG_SETUP_MEMORY_TAGS) || \
41 defined(CONFIG_CMDLINE_TAG) || \
42 defined(CONFIG_INITRD_TAG) || \
43 defined(CONFIG_SERIAL_TAG) || \
44 defined(CONFIG_REVISION_TAG)
45 static struct tag *params;
48 static ulong get_sp(void)
52 asm("mov %0, sp" : "=r"(ret) : );
56 void arch_lmb_reserve(struct lmb *lmb)
61 * Booting a (Linux) kernel image
63 * Allocate space for command line and board info - the
64 * address should be as high as possible within the reach of
65 * the kernel (see CONFIG_SYS_BOOTMAPSZ settings), but in unused
66 * memory, which means far enough below the current stack
70 debug("## Current stack ends at 0x%08lx ", sp);
72 /* adjust sp by 4K to be safe */
75 gd->bd->bi_dram[0].start + gd->bd->bi_dram[0].size - sp);
78 #ifdef CONFIG_OF_LIBFDT
79 static int fixup_memory_node(void *blob)
83 u64 start[CONFIG_NR_DRAM_BANKS];
84 u64 size[CONFIG_NR_DRAM_BANKS];
86 for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) {
87 start[bank] = bd->bi_dram[bank].start;
88 size[bank] = bd->bi_dram[bank].size;
91 return fdt_fixup_memory_banks(blob, start, size, CONFIG_NR_DRAM_BANKS);
95 static void announce_and_cleanup(void)
97 printf("\nStarting kernel ...\n\n");
98 bootstage_mark_name(BOOTSTAGE_ID_BOOTM_HANDOFF, "start_kernel");
99 #ifdef CONFIG_BOOTSTAGE_FDT
100 bootstage_fdt_add_report();
102 #ifdef CONFIG_BOOTSTAGE_REPORT
106 #ifdef CONFIG_USB_DEVICE
109 cleanup_before_linux();
112 #if defined(CONFIG_SETUP_MEMORY_TAGS) || \
113 defined(CONFIG_CMDLINE_TAG) || \
114 defined(CONFIG_INITRD_TAG) || \
115 defined(CONFIG_SERIAL_TAG) || \
116 defined(CONFIG_REVISION_TAG)
117 static void setup_start_tag (bd_t *bd)
119 params = (struct tag *)bd->bi_boot_params;
121 params->hdr.tag = ATAG_CORE;
122 params->hdr.size = tag_size (tag_core);
124 params->u.core.flags = 0;
125 params->u.core.pagesize = 0;
126 params->u.core.rootdev = 0;
128 params = tag_next (params);
132 #ifdef CONFIG_SETUP_MEMORY_TAGS
133 static void setup_memory_tags(bd_t *bd)
137 for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
138 params->hdr.tag = ATAG_MEM;
139 params->hdr.size = tag_size (tag_mem32);
141 params->u.mem.start = bd->bi_dram[i].start;
142 params->u.mem.size = bd->bi_dram[i].size;
144 params = tag_next (params);
149 #ifdef CONFIG_CMDLINE_TAG
150 static void setup_commandline_tag(bd_t *bd, char *commandline)
157 /* eat leading white space */
158 for (p = commandline; *p == ' '; p++);
160 /* skip non-existent command lines so the kernel will still
161 * use its default command line.
166 params->hdr.tag = ATAG_CMDLINE;
168 (sizeof (struct tag_header) + strlen (p) + 1 + 4) >> 2;
170 strcpy (params->u.cmdline.cmdline, p);
172 params = tag_next (params);
176 #ifdef CONFIG_INITRD_TAG
177 static void setup_initrd_tag(bd_t *bd, ulong initrd_start, ulong initrd_end)
179 /* an ATAG_INITRD node tells the kernel where the compressed
180 * ramdisk can be found. ATAG_RDIMG is a better name, actually.
182 params->hdr.tag = ATAG_INITRD2;
183 params->hdr.size = tag_size (tag_initrd);
185 params->u.initrd.start = initrd_start;
186 params->u.initrd.size = initrd_end - initrd_start;
188 params = tag_next (params);
192 #ifdef CONFIG_SERIAL_TAG
193 void setup_serial_tag(struct tag **tmp)
195 struct tag *params = *tmp;
196 struct tag_serialnr serialnr;
197 void get_board_serial(struct tag_serialnr *serialnr);
199 get_board_serial(&serialnr);
200 params->hdr.tag = ATAG_SERIAL;
201 params->hdr.size = tag_size (tag_serialnr);
202 params->u.serialnr.low = serialnr.low;
203 params->u.serialnr.high= serialnr.high;
204 params = tag_next (params);
209 #ifdef CONFIG_REVISION_TAG
210 void setup_revision_tag(struct tag **in_params)
213 u32 get_board_rev(void);
215 rev = get_board_rev();
216 params->hdr.tag = ATAG_REVISION;
217 params->hdr.size = tag_size (tag_revision);
218 params->u.revision.rev = rev;
219 params = tag_next (params);
223 #if defined(CONFIG_SETUP_MEMORY_TAGS) || \
224 defined(CONFIG_CMDLINE_TAG) || \
225 defined(CONFIG_INITRD_TAG) || \
226 defined(CONFIG_SERIAL_TAG) || \
227 defined(CONFIG_REVISION_TAG)
228 static void setup_end_tag(bd_t *bd)
230 params->hdr.tag = ATAG_NONE;
231 params->hdr.size = 0;
235 #ifdef CONFIG_OF_LIBFDT
236 static int create_fdt(bootm_headers_t *images)
238 ulong of_size = images->ft_len;
239 char **of_flat_tree = &images->ft_addr;
240 ulong *initrd_start = &images->initrd_start;
241 ulong *initrd_end = &images->initrd_end;
242 struct lmb *lmb = &images->lmb;
246 debug("using: FDT\n");
248 boot_fdt_add_mem_rsv_regions(lmb, *of_flat_tree);
250 rd_len = images->rd_end - images->rd_start;
251 ret = boot_ramdisk_high(lmb, images->rd_start, rd_len,
252 initrd_start, initrd_end);
256 ret = boot_relocate_fdt(lmb, of_flat_tree, &of_size);
260 fdt_chosen(*of_flat_tree, 1);
261 fixup_memory_node(*of_flat_tree);
262 fdt_fixup_ethernet(*of_flat_tree);
263 fdt_initrd(*of_flat_tree, *initrd_start, *initrd_end, 1);
264 #ifdef CONFIG_OF_BOARD_SETUP
265 ft_board_setup(*of_flat_tree, gd->bd);
272 /* Subcommand: PREP */
273 static void boot_prep_linux(bootm_headers_t *images)
275 #ifdef CONFIG_CMDLINE_TAG
276 char *commandline = getenv("bootargs");
279 #ifdef CONFIG_OF_LIBFDT
280 if (images->ft_len) {
281 debug("using: FDT\n");
282 if (create_fdt(images)) {
283 printf("FDT creation failed! hanging...");
289 #if defined(CONFIG_SETUP_MEMORY_TAGS) || \
290 defined(CONFIG_CMDLINE_TAG) || \
291 defined(CONFIG_INITRD_TAG) || \
292 defined(CONFIG_SERIAL_TAG) || \
293 defined(CONFIG_REVISION_TAG)
294 debug("using: ATAGS\n");
295 setup_start_tag(gd->bd);
296 #ifdef CONFIG_SERIAL_TAG
297 setup_serial_tag(¶ms);
299 #ifdef CONFIG_CMDLINE_TAG
300 setup_commandline_tag(gd->bd, commandline);
302 #ifdef CONFIG_REVISION_TAG
303 setup_revision_tag(¶ms);
305 #ifdef CONFIG_SETUP_MEMORY_TAGS
306 setup_memory_tags(gd->bd);
308 #ifdef CONFIG_INITRD_TAG
309 if (images->rd_start && images->rd_end)
310 setup_initrd_tag(gd->bd, images->rd_start,
313 setup_end_tag(gd->bd);
315 printf("FDT and ATAGS support not compiled in - hanging\n");
317 #endif /* all tags */
322 static void boot_jump_linux(bootm_headers_t *images)
324 unsigned long machid = gd->bd->bi_arch_number;
326 void (*kernel_entry)(int zero, int arch, uint params);
329 kernel_entry = (void (*)(int, int, uint))images->ep;
331 s = getenv("machid");
333 strict_strtoul(s, 16, &machid);
334 printf("Using machid 0x%lx from environment\n", machid);
337 debug("## Transferring control to Linux (at address %08lx)" \
338 "...\n", (ulong) kernel_entry);
339 bootstage_mark(BOOTSTAGE_ID_RUN_OS);
340 announce_and_cleanup();
342 #ifdef CONFIG_OF_LIBFDT
344 r2 = (unsigned long)images->ft_addr;
347 r2 = gd->bd->bi_boot_params;
349 kernel_entry(0, machid, r2);
352 /* Main Entry point for arm bootm implementation
354 * Modeled after the powerpc implementation
355 * DIFFERENCE: Instead of calling prep and go at the end
356 * they are called if subcommand is equal 0.
358 int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
360 /* No need for those on ARM */
361 if (flag & BOOTM_STATE_OS_BD_T || flag & BOOTM_STATE_OS_CMDLINE)
364 if (flag & BOOTM_STATE_OS_PREP) {
365 boot_prep_linux(images);
369 if (flag & BOOTM_STATE_OS_GO) {
370 boot_jump_linux(images);
374 boot_prep_linux(images);
375 boot_jump_linux(images);
379 #ifdef CONFIG_CMD_BOOTZ
381 struct zimage_header {
388 #define LINUX_ARM_ZIMAGE_MAGIC 0x016f2818
390 int bootz_setup(void *image, void **start, void **end)
392 struct zimage_header *zi = (struct zimage_header *)image;
394 if (zi->zi_magic != LINUX_ARM_ZIMAGE_MAGIC) {
395 puts("Bad Linux ARM zImage magic!\n");
399 *start = (void *)zi->zi_start;
400 *end = (void *)zi->zi_end;
402 debug("Kernel image @ 0x%08x [ 0x%08x - 0x%08x ]\n",
403 (uint32_t)image, (uint32_t)*start, (uint32_t)*end);
407 #endif /* CONFIG_CMD_BOOTZ */