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>
37 #include <linux/compiler.h>
39 DECLARE_GLOBAL_DATA_PTR;
41 #if defined(CONFIG_SETUP_MEMORY_TAGS) || \
42 defined(CONFIG_CMDLINE_TAG) || \
43 defined(CONFIG_INITRD_TAG) || \
44 defined(CONFIG_SERIAL_TAG) || \
45 defined(CONFIG_REVISION_TAG)
46 static struct tag *params;
49 static ulong get_sp(void)
53 asm("mov %0, sp" : "=r"(ret) : );
57 void arch_lmb_reserve(struct lmb *lmb)
62 * Booting a (Linux) kernel image
64 * Allocate space for command line and board info - the
65 * address should be as high as possible within the reach of
66 * the kernel (see CONFIG_SYS_BOOTMAPSZ settings), but in unused
67 * memory, which means far enough below the current stack
71 debug("## Current stack ends at 0x%08lx ", sp);
73 /* adjust sp by 4K to be safe */
76 gd->bd->bi_dram[0].start + gd->bd->bi_dram[0].size - sp);
79 #ifdef CONFIG_OF_LIBFDT
80 static int fixup_memory_node(void *blob)
84 u64 start[CONFIG_NR_DRAM_BANKS];
85 u64 size[CONFIG_NR_DRAM_BANKS];
87 for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) {
88 start[bank] = bd->bi_dram[bank].start;
89 size[bank] = bd->bi_dram[bank].size;
92 return fdt_fixup_memory_banks(blob, start, size, CONFIG_NR_DRAM_BANKS);
96 static void announce_and_cleanup(void)
98 printf("\nStarting kernel ...\n\n");
99 bootstage_mark_name(BOOTSTAGE_ID_BOOTM_HANDOFF, "start_kernel");
100 #ifdef CONFIG_BOOTSTAGE_FDT
101 bootstage_fdt_add_report();
103 #ifdef CONFIG_BOOTSTAGE_REPORT
107 #ifdef CONFIG_USB_DEVICE
110 cleanup_before_linux();
113 #if defined(CONFIG_SETUP_MEMORY_TAGS) || \
114 defined(CONFIG_CMDLINE_TAG) || \
115 defined(CONFIG_INITRD_TAG) || \
116 defined(CONFIG_SERIAL_TAG) || \
117 defined(CONFIG_REVISION_TAG)
118 static void setup_start_tag (bd_t *bd)
120 params = (struct tag *)bd->bi_boot_params;
122 params->hdr.tag = ATAG_CORE;
123 params->hdr.size = tag_size (tag_core);
125 params->u.core.flags = 0;
126 params->u.core.pagesize = 0;
127 params->u.core.rootdev = 0;
129 params = tag_next (params);
133 #ifdef CONFIG_SETUP_MEMORY_TAGS
134 static void setup_memory_tags(bd_t *bd)
138 for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
139 params->hdr.tag = ATAG_MEM;
140 params->hdr.size = tag_size (tag_mem32);
142 params->u.mem.start = bd->bi_dram[i].start;
143 params->u.mem.size = bd->bi_dram[i].size;
145 params = tag_next (params);
150 #ifdef CONFIG_CMDLINE_TAG
151 static void setup_commandline_tag(bd_t *bd, char *commandline)
158 /* eat leading white space */
159 for (p = commandline; *p == ' '; p++);
161 /* skip non-existent command lines so the kernel will still
162 * use its default command line.
167 params->hdr.tag = ATAG_CMDLINE;
169 (sizeof (struct tag_header) + strlen (p) + 1 + 4) >> 2;
171 strcpy (params->u.cmdline.cmdline, p);
173 params = tag_next (params);
177 #ifdef CONFIG_INITRD_TAG
178 static void setup_initrd_tag(bd_t *bd, ulong initrd_start, ulong initrd_end)
180 /* an ATAG_INITRD node tells the kernel where the compressed
181 * ramdisk can be found. ATAG_RDIMG is a better name, actually.
183 params->hdr.tag = ATAG_INITRD2;
184 params->hdr.size = tag_size (tag_initrd);
186 params->u.initrd.start = initrd_start;
187 params->u.initrd.size = initrd_end - initrd_start;
189 params = tag_next (params);
193 #ifdef CONFIG_SERIAL_TAG
194 void setup_serial_tag(struct tag **tmp)
196 struct tag *params = *tmp;
197 struct tag_serialnr serialnr;
198 void get_board_serial(struct tag_serialnr *serialnr);
200 get_board_serial(&serialnr);
201 params->hdr.tag = ATAG_SERIAL;
202 params->hdr.size = tag_size (tag_serialnr);
203 params->u.serialnr.low = serialnr.low;
204 params->u.serialnr.high= serialnr.high;
205 params = tag_next (params);
210 #ifdef CONFIG_REVISION_TAG
211 void setup_revision_tag(struct tag **in_params)
214 u32 get_board_rev(void);
216 rev = get_board_rev();
217 params->hdr.tag = ATAG_REVISION;
218 params->hdr.size = tag_size (tag_revision);
219 params->u.revision.rev = rev;
220 params = tag_next (params);
224 #if defined(CONFIG_SETUP_MEMORY_TAGS) || \
225 defined(CONFIG_CMDLINE_TAG) || \
226 defined(CONFIG_INITRD_TAG) || \
227 defined(CONFIG_SERIAL_TAG) || \
228 defined(CONFIG_REVISION_TAG)
229 static void setup_end_tag(bd_t *bd)
231 params->hdr.tag = ATAG_NONE;
232 params->hdr.size = 0;
236 #ifdef CONFIG_OF_LIBFDT
237 static int create_fdt(bootm_headers_t *images)
239 ulong of_size = images->ft_len;
240 char **of_flat_tree = &images->ft_addr;
241 ulong *initrd_start = &images->initrd_start;
242 ulong *initrd_end = &images->initrd_end;
243 struct lmb *lmb = &images->lmb;
247 debug("using: FDT\n");
249 boot_fdt_add_mem_rsv_regions(lmb, *of_flat_tree);
251 rd_len = images->rd_end - images->rd_start;
252 ret = boot_ramdisk_high(lmb, images->rd_start, rd_len,
253 initrd_start, initrd_end);
257 ret = boot_relocate_fdt(lmb, of_flat_tree, &of_size);
261 fdt_chosen(*of_flat_tree, 1);
262 fixup_memory_node(*of_flat_tree);
263 fdt_fixup_ethernet(*of_flat_tree);
264 fdt_initrd(*of_flat_tree, *initrd_start, *initrd_end, 1);
265 #ifdef CONFIG_OF_BOARD_SETUP
266 ft_board_setup(*of_flat_tree, gd->bd);
273 __weak void setup_board_tags(struct tag **in_params) {}
275 /* Subcommand: PREP */
276 static void boot_prep_linux(bootm_headers_t *images)
278 #ifdef CONFIG_CMDLINE_TAG
279 char *commandline = getenv("bootargs");
282 #ifdef CONFIG_OF_LIBFDT
283 if (images->ft_len) {
284 debug("using: FDT\n");
285 if (create_fdt(images)) {
286 printf("FDT creation failed! hanging...");
292 #if defined(CONFIG_SETUP_MEMORY_TAGS) || \
293 defined(CONFIG_CMDLINE_TAG) || \
294 defined(CONFIG_INITRD_TAG) || \
295 defined(CONFIG_SERIAL_TAG) || \
296 defined(CONFIG_REVISION_TAG)
297 debug("using: ATAGS\n");
298 setup_start_tag(gd->bd);
299 #ifdef CONFIG_SERIAL_TAG
300 setup_serial_tag(¶ms);
302 #ifdef CONFIG_CMDLINE_TAG
303 setup_commandline_tag(gd->bd, commandline);
305 #ifdef CONFIG_REVISION_TAG
306 setup_revision_tag(¶ms);
308 #ifdef CONFIG_SETUP_MEMORY_TAGS
309 setup_memory_tags(gd->bd);
311 #ifdef CONFIG_INITRD_TAG
312 if (images->rd_start && images->rd_end)
313 setup_initrd_tag(gd->bd, images->rd_start,
316 setup_board_tags(¶ms);
317 setup_end_tag(gd->bd);
319 printf("FDT and ATAGS support not compiled in - hanging\n");
321 #endif /* all tags */
326 static void boot_jump_linux(bootm_headers_t *images)
328 unsigned long machid = gd->bd->bi_arch_number;
330 void (*kernel_entry)(int zero, int arch, uint params);
333 kernel_entry = (void (*)(int, int, uint))images->ep;
335 s = getenv("machid");
337 strict_strtoul(s, 16, &machid);
338 printf("Using machid 0x%lx from environment\n", machid);
341 debug("## Transferring control to Linux (at address %08lx)" \
342 "...\n", (ulong) kernel_entry);
343 bootstage_mark(BOOTSTAGE_ID_RUN_OS);
344 announce_and_cleanup();
346 #ifdef CONFIG_OF_LIBFDT
348 r2 = (unsigned long)images->ft_addr;
351 r2 = gd->bd->bi_boot_params;
353 kernel_entry(0, machid, r2);
356 /* Main Entry point for arm bootm implementation
358 * Modeled after the powerpc implementation
359 * DIFFERENCE: Instead of calling prep and go at the end
360 * they are called if subcommand is equal 0.
362 int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
364 /* No need for those on ARM */
365 if (flag & BOOTM_STATE_OS_BD_T || flag & BOOTM_STATE_OS_CMDLINE)
368 if (flag & BOOTM_STATE_OS_PREP) {
369 boot_prep_linux(images);
373 if (flag & BOOTM_STATE_OS_GO) {
374 boot_jump_linux(images);
378 boot_prep_linux(images);
379 boot_jump_linux(images);
383 #ifdef CONFIG_CMD_BOOTZ
385 struct zimage_header {
392 #define LINUX_ARM_ZIMAGE_MAGIC 0x016f2818
394 int bootz_setup(void *image, void **start, void **end)
396 struct zimage_header *zi = (struct zimage_header *)image;
398 if (zi->zi_magic != LINUX_ARM_ZIMAGE_MAGIC) {
399 puts("Bad Linux ARM zImage magic!\n");
403 *start = (void *)zi->zi_start;
404 *end = (void *)zi->zi_end;
406 debug("Kernel image @ 0x%08x [ 0x%08x - 0x%08x ]\n",
407 (uint32_t)image, (uint32_t)*start, (uint32_t)*end);
411 #endif /* CONFIG_CMD_BOOTZ */