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 1K 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_REPORT
103 #ifdef CONFIG_USB_DEVICE
106 cleanup_before_linux();
109 #if defined(CONFIG_SETUP_MEMORY_TAGS) || \
110 defined(CONFIG_CMDLINE_TAG) || \
111 defined(CONFIG_INITRD_TAG) || \
112 defined(CONFIG_SERIAL_TAG) || \
113 defined(CONFIG_REVISION_TAG)
114 static void setup_start_tag (bd_t *bd)
116 params = (struct tag *)bd->bi_boot_params;
118 params->hdr.tag = ATAG_CORE;
119 params->hdr.size = tag_size (tag_core);
121 params->u.core.flags = 0;
122 params->u.core.pagesize = 0;
123 params->u.core.rootdev = 0;
125 params = tag_next (params);
129 #ifdef CONFIG_SETUP_MEMORY_TAGS
130 static void setup_memory_tags(bd_t *bd)
134 for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
135 params->hdr.tag = ATAG_MEM;
136 params->hdr.size = tag_size (tag_mem32);
138 params->u.mem.start = bd->bi_dram[i].start;
139 params->u.mem.size = bd->bi_dram[i].size;
141 params = tag_next (params);
146 #ifdef CONFIG_CMDLINE_TAG
147 static void setup_commandline_tag(bd_t *bd, char *commandline)
154 /* eat leading white space */
155 for (p = commandline; *p == ' '; p++);
157 /* skip non-existent command lines so the kernel will still
158 * use its default command line.
163 params->hdr.tag = ATAG_CMDLINE;
165 (sizeof (struct tag_header) + strlen (p) + 1 + 4) >> 2;
167 strcpy (params->u.cmdline.cmdline, p);
169 params = tag_next (params);
173 #ifdef CONFIG_INITRD_TAG
174 static void setup_initrd_tag(bd_t *bd, ulong initrd_start, ulong initrd_end)
176 /* an ATAG_INITRD node tells the kernel where the compressed
177 * ramdisk can be found. ATAG_RDIMG is a better name, actually.
179 params->hdr.tag = ATAG_INITRD2;
180 params->hdr.size = tag_size (tag_initrd);
182 params->u.initrd.start = initrd_start;
183 params->u.initrd.size = initrd_end - initrd_start;
185 params = tag_next (params);
189 #ifdef CONFIG_SERIAL_TAG
190 void setup_serial_tag(struct tag **tmp)
192 struct tag *params = *tmp;
193 struct tag_serialnr serialnr;
194 void get_board_serial(struct tag_serialnr *serialnr);
196 get_board_serial(&serialnr);
197 params->hdr.tag = ATAG_SERIAL;
198 params->hdr.size = tag_size (tag_serialnr);
199 params->u.serialnr.low = serialnr.low;
200 params->u.serialnr.high= serialnr.high;
201 params = tag_next (params);
206 #ifdef CONFIG_REVISION_TAG
207 void setup_revision_tag(struct tag **in_params)
210 u32 get_board_rev(void);
212 rev = get_board_rev();
213 params->hdr.tag = ATAG_REVISION;
214 params->hdr.size = tag_size (tag_revision);
215 params->u.revision.rev = rev;
216 params = tag_next (params);
220 #if defined(CONFIG_SETUP_MEMORY_TAGS) || \
221 defined(CONFIG_CMDLINE_TAG) || \
222 defined(CONFIG_INITRD_TAG) || \
223 defined(CONFIG_SERIAL_TAG) || \
224 defined(CONFIG_REVISION_TAG)
225 static void setup_end_tag(bd_t *bd)
227 params->hdr.tag = ATAG_NONE;
228 params->hdr.size = 0;
232 #ifdef CONFIG_OF_LIBFDT
233 static int create_fdt(bootm_headers_t *images)
235 ulong of_size = images->ft_len;
236 char **of_flat_tree = &images->ft_addr;
237 ulong *initrd_start = &images->initrd_start;
238 ulong *initrd_end = &images->initrd_end;
239 struct lmb *lmb = &images->lmb;
243 debug("using: FDT\n");
245 boot_fdt_add_mem_rsv_regions(lmb, *of_flat_tree);
247 rd_len = images->rd_end - images->rd_start;
248 ret = boot_ramdisk_high(lmb, images->rd_start, rd_len,
249 initrd_start, initrd_end);
253 ret = boot_relocate_fdt(lmb, of_flat_tree, &of_size);
257 fdt_chosen(*of_flat_tree, 1);
258 fixup_memory_node(*of_flat_tree);
259 fdt_fixup_ethernet(*of_flat_tree);
260 fdt_initrd(*of_flat_tree, *initrd_start, *initrd_end, 1);
266 /* Subcommand: PREP */
267 static void boot_prep_linux(bootm_headers_t *images)
269 #ifdef CONFIG_CMDLINE_TAG
270 char *commandline = getenv("bootargs");
273 #ifdef CONFIG_OF_LIBFDT
274 if (images->ft_len) {
275 debug("using: FDT\n");
276 if (create_fdt(images)) {
277 printf("FDT creation failed! hanging...");
283 #if defined(CONFIG_SETUP_MEMORY_TAGS) || \
284 defined(CONFIG_CMDLINE_TAG) || \
285 defined(CONFIG_INITRD_TAG) || \
286 defined(CONFIG_SERIAL_TAG) || \
287 defined(CONFIG_REVISION_TAG)
288 debug("using: ATAGS\n");
289 setup_start_tag(gd->bd);
290 #ifdef CONFIG_SERIAL_TAG
291 setup_serial_tag(¶ms);
293 #ifdef CONFIG_CMDLINE_TAG
294 setup_commandline_tag(gd->bd, commandline);
296 #ifdef CONFIG_REVISION_TAG
297 setup_revision_tag(¶ms);
299 #ifdef CONFIG_SETUP_MEMORY_TAGS
300 setup_memory_tags(gd->bd);
302 #ifdef CONFIG_INITRD_TAG
303 if (images->rd_start && images->rd_end)
304 setup_initrd_tag(gd->bd, images->rd_start,
307 setup_end_tag(gd->bd);
309 printf("FDT and ATAGS support not compiled in - hanging\n");
311 #endif /* all tags */
316 static void boot_jump_linux(bootm_headers_t *images)
318 unsigned long machid = gd->bd->bi_arch_number;
320 void (*kernel_entry)(int zero, int arch, uint params);
323 kernel_entry = (void (*)(int, int, uint))images->ep;
325 s = getenv("machid");
327 strict_strtoul(s, 16, &machid);
328 printf("Using machid 0x%lx from environment\n", machid);
331 debug("## Transferring control to Linux (at address %08lx)" \
332 "...\n", (ulong) kernel_entry);
333 bootstage_mark(BOOTSTAGE_ID_RUN_OS);
334 announce_and_cleanup();
336 #ifdef CONFIG_OF_LIBFDT
338 r2 = (unsigned long)images->ft_addr;
341 r2 = gd->bd->bi_boot_params;
343 kernel_entry(0, machid, r2);
346 /* Main Entry point for arm bootm implementation
348 * Modeled after the powerpc implementation
349 * DIFFERENCE: Instead of calling prep and go at the end
350 * they are called if subcommand is equal 0.
352 int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
354 /* No need for those on ARM */
355 if (flag & BOOTM_STATE_OS_BD_T || flag & BOOTM_STATE_OS_CMDLINE)
358 if (flag & BOOTM_STATE_OS_PREP) {
359 boot_prep_linux(images);
363 if (flag & BOOTM_STATE_OS_GO) {
364 boot_jump_linux(images);
368 boot_prep_linux(images);
369 boot_jump_linux(images);
373 #ifdef CONFIG_CMD_BOOTZ
375 struct zimage_header {
382 #define LINUX_ARM_ZIMAGE_MAGIC 0x016f2818
384 int bootz_setup(void *image, void **start, void **end)
386 struct zimage_header *zi = (struct zimage_header *)image;
388 if (zi->zi_magic != LINUX_ARM_ZIMAGE_MAGIC) {
389 puts("Bad Linux ARM zImage magic!\n");
393 *start = (void *)zi->zi_start;
394 *end = (void *)zi->zi_end;
396 debug("Kernel image @ 0x%08x [ 0x%08x - 0x%08x ]\n",
397 (uint32_t)image, (uint32_t)*start, (uint32_t)*end);
401 #endif /* CONFIG_CMD_BOOTZ */