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wdenkc6097192002-11-03 00:24:07 +00001/*
2 * (C) Copyright 2002
3 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
4 * Marius Groeger <mgroeger@sysgo.de>
5 *
6 * Copyright (C) 2001 Erik Mouw (J.A.K.Mouw@its.tudelft.nl)
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
wdenk232c1502004-03-12 00:14:09 +000015 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
wdenkc6097192002-11-03 00:24:07 +000016 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
wdenk232c1502004-03-12 00:14:09 +000020 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
wdenkc6097192002-11-03 00:24:07 +000021 *
22 */
23
24#include <common.h>
25#include <command.h>
wdenkc6097192002-11-03 00:24:07 +000026#include <image.h>
Jean-Christophe PLAGNIOL-VILLARDa31e0912009-04-04 12:49:11 +020027#include <u-boot/zlib.h>
wdenkc6097192002-11-03 00:24:07 +000028#include <asm/byteorder.h>
John Rigby2d1916e2010-10-13 13:57:36 -060029#include <fdt.h>
30#include <libfdt.h>
31#include <fdt_support.h>
wdenkc6097192002-11-03 00:24:07 +000032
Wolfgang Denkd87080b2006-03-31 18:32:53 +020033DECLARE_GLOBAL_DATA_PTR;
34
wdenkc6097192002-11-03 00:24:07 +000035#if defined (CONFIG_SETUP_MEMORY_TAGS) || \
36 defined (CONFIG_CMDLINE_TAG) || \
37 defined (CONFIG_INITRD_TAG) || \
wdenkb6e4c402004-01-02 16:05:07 +000038 defined (CONFIG_SERIAL_TAG) || \
Minkyu Kang47ea6ed2010-06-18 19:31:10 +090039 defined (CONFIG_REVISION_TAG)
wdenk5779d8d2003-12-06 23:55:10 +000040static void setup_start_tag (bd_t *bd);
41
wdenk699b13a2002-11-03 18:03:52 +000042# ifdef CONFIG_SETUP_MEMORY_TAGS
wdenk5779d8d2003-12-06 23:55:10 +000043static void setup_memory_tags (bd_t *bd);
wdenk699b13a2002-11-03 18:03:52 +000044# endif
wdenk5779d8d2003-12-06 23:55:10 +000045static void setup_commandline_tag (bd_t *bd, char *commandline);
46
wdenk699b13a2002-11-03 18:03:52 +000047# ifdef CONFIG_INITRD_TAG
wdenk5779d8d2003-12-06 23:55:10 +000048static void setup_initrd_tag (bd_t *bd, ulong initrd_start,
49 ulong initrd_end);
wdenk699b13a2002-11-03 18:03:52 +000050# endif
wdenk5779d8d2003-12-06 23:55:10 +000051static void setup_end_tag (bd_t *bd);
52
wdenkc6097192002-11-03 00:24:07 +000053static struct tag *params;
54#endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */
55
John Rigby2d1916e2010-10-13 13:57:36 -060056static ulong get_sp(void);
57#if defined(CONFIG_OF_LIBFDT)
58static int bootm_linux_fdt(int machid, bootm_headers_t *images);
59#endif
60
61void arch_lmb_reserve(struct lmb *lmb)
62{
63 ulong sp;
64
65 /*
66 * Booting a (Linux) kernel image
67 *
68 * Allocate space for command line and board info - the
69 * address should be as high as possible within the reach of
70 * the kernel (see CONFIG_SYS_BOOTMAPSZ settings), but in unused
71 * memory, which means far enough below the current stack
72 * pointer.
73 */
74 sp = get_sp();
75 debug("## Current stack ends at 0x%08lx ", sp);
76
77 /* adjust sp by 1K to be safe */
78 sp -= 1024;
79 lmb_reserve(lmb, sp,
80 gd->bd->bi_dram[0].start + gd->bd->bi_dram[0].size - sp);
81}
82
83static void announce_and_cleanup(void)
84{
85 printf("\nStarting kernel ...\n\n");
86
87#ifdef CONFIG_USB_DEVICE
88 {
89 extern void udc_disconnect(void);
90 udc_disconnect();
91 }
92#endif
93 cleanup_before_linux();
94}
95
96int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
wdenkc6097192002-11-03 00:24:07 +000097{
Marian Balakowiczd5934ad2008-02-04 08:28:09 +010098 bd_t *bd = gd->bd;
99 char *s;
100 int machid = bd->bi_arch_number;
John Rigby2d1916e2010-10-13 13:57:36 -0600101 void (*kernel_entry)(int zero, int arch, uint params);
wdenk5779d8d2003-12-06 23:55:10 +0000102
wdenkc6097192002-11-03 00:24:07 +0000103#ifdef CONFIG_CMDLINE_TAG
wdenk5779d8d2003-12-06 23:55:10 +0000104 char *commandline = getenv ("bootargs");
wdenkc6097192002-11-03 00:24:07 +0000105#endif
106
Ilko Iliev263b7492008-11-09 15:53:14 +0100107 if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
Kumar Gala49c3a862008-10-21 17:25:45 -0500108 return 1;
109
Uwe Kleine-König3c234ef2008-01-30 09:08:49 +0100110 s = getenv ("machid");
111 if (s) {
112 machid = simple_strtoul (s, NULL, 16);
113 printf ("Using machid 0x%x from environment\n", machid);
114 }
115
Heiko Schocherfad63402007-07-13 09:54:17 +0200116 show_boot_progress (15);
wdenk384ae022002-11-05 00:17:55 +0000117
John Rigby2d1916e2010-10-13 13:57:36 -0600118#ifdef CONFIG_OF_LIBFDT
119 if (images->ft_len)
120 return bootm_linux_fdt(machid, images);
121#endif
122
123 kernel_entry = (void (*)(int, int, uint))images->ep;
124
wdenk5779d8d2003-12-06 23:55:10 +0000125 debug ("## Transferring control to Linux (at address %08lx) ...\n",
John Rigby2d1916e2010-10-13 13:57:36 -0600126 (ulong) kernel_entry);
wdenkc6097192002-11-03 00:24:07 +0000127
128#if defined (CONFIG_SETUP_MEMORY_TAGS) || \
129 defined (CONFIG_CMDLINE_TAG) || \
130 defined (CONFIG_INITRD_TAG) || \
wdenkb6e4c402004-01-02 16:05:07 +0000131 defined (CONFIG_SERIAL_TAG) || \
Minkyu Kang47ea6ed2010-06-18 19:31:10 +0900132 defined (CONFIG_REVISION_TAG)
wdenk5779d8d2003-12-06 23:55:10 +0000133 setup_start_tag (bd);
wdenkb6e4c402004-01-02 16:05:07 +0000134#ifdef CONFIG_SERIAL_TAG
135 setup_serial_tag (&params);
136#endif
137#ifdef CONFIG_REVISION_TAG
138 setup_revision_tag (&params);
139#endif
wdenkc6097192002-11-03 00:24:07 +0000140#ifdef CONFIG_SETUP_MEMORY_TAGS
wdenk5779d8d2003-12-06 23:55:10 +0000141 setup_memory_tags (bd);
wdenkc6097192002-11-03 00:24:07 +0000142#endif
143#ifdef CONFIG_CMDLINE_TAG
wdenk5779d8d2003-12-06 23:55:10 +0000144 setup_commandline_tag (bd, commandline);
wdenkc6097192002-11-03 00:24:07 +0000145#endif
146#ifdef CONFIG_INITRD_TAG
Kumar Galac4f94192008-08-15 08:24:37 -0500147 if (images->rd_start && images->rd_end)
148 setup_initrd_tag (bd, images->rd_start, images->rd_end);
wdenkc6097192002-11-03 00:24:07 +0000149#endif
John Rigby2d1916e2010-10-13 13:57:36 -0600150 setup_end_tag(bd);
wdenkc6097192002-11-03 00:24:07 +0000151#endif
152
John Rigby2d1916e2010-10-13 13:57:36 -0600153 announce_and_cleanup();
wdenkc6097192002-11-03 00:24:07 +0000154
John Rigby2d1916e2010-10-13 13:57:36 -0600155 kernel_entry(0, machid, bd->bi_boot_params);
Marian Balakowiczcd7c5962008-03-12 10:33:00 +0100156 /* does not return */
Wolfgang Denk10551712008-09-08 23:26:22 +0200157
Kumar Gala40d7e992008-08-15 08:24:45 -0500158 return 1;
wdenkc6097192002-11-03 00:24:07 +0000159}
160
John Rigby2d1916e2010-10-13 13:57:36 -0600161#if defined(CONFIG_OF_LIBFDT)
162static int fixup_memory_node(void *blob)
163{
164 bd_t *bd = gd->bd;
165 int bank;
166 u64 start[CONFIG_NR_DRAM_BANKS];
167 u64 size[CONFIG_NR_DRAM_BANKS];
168
169 for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) {
170 start[bank] = bd->bi_dram[bank].start;
171 size[bank] = bd->bi_dram[bank].size;
172 }
173
174 return fdt_fixup_memory_banks(blob, start, size, CONFIG_NR_DRAM_BANKS);
175}
176
177static int bootm_linux_fdt(int machid, bootm_headers_t *images)
178{
179 ulong rd_len;
John Rigby2d1916e2010-10-13 13:57:36 -0600180 void (*kernel_entry)(int zero, int dt_machid, void *dtblob);
John Rigby2d1916e2010-10-13 13:57:36 -0600181 ulong of_size = images->ft_len;
182 char **of_flat_tree = &images->ft_addr;
183 ulong *initrd_start = &images->initrd_start;
184 ulong *initrd_end = &images->initrd_end;
185 struct lmb *lmb = &images->lmb;
186 int ret;
187
188 kernel_entry = (void (*)(int, int, void *))images->ep;
189
Grant Likely55b0a392011-03-28 09:59:01 +0000190 boot_fdt_add_mem_rsv_regions(lmb, *of_flat_tree);
191
John Rigby2d1916e2010-10-13 13:57:36 -0600192 rd_len = images->rd_end - images->rd_start;
193 ret = boot_ramdisk_high(lmb, images->rd_start, rd_len,
194 initrd_start, initrd_end);
195 if (ret)
196 return ret;
197
Grant Likely590d3ca2011-03-28 09:58:34 +0000198 ret = boot_relocate_fdt(lmb, of_flat_tree, &of_size);
John Rigby2d1916e2010-10-13 13:57:36 -0600199 if (ret)
200 return ret;
201
202 debug("## Transferring control to Linux (at address %08lx) ...\n",
203 (ulong) kernel_entry);
204
205 fdt_chosen(*of_flat_tree, 1);
206
207 fixup_memory_node(*of_flat_tree);
208
209 fdt_initrd(*of_flat_tree, *initrd_start, *initrd_end, 1);
210
211 announce_and_cleanup();
212
213 kernel_entry(0, machid, *of_flat_tree);
214 /* does not return */
215
216 return 1;
217}
218#endif
wdenkc6097192002-11-03 00:24:07 +0000219
220#if defined (CONFIG_SETUP_MEMORY_TAGS) || \
221 defined (CONFIG_CMDLINE_TAG) || \
222 defined (CONFIG_INITRD_TAG) || \
wdenkb6e4c402004-01-02 16:05:07 +0000223 defined (CONFIG_SERIAL_TAG) || \
Minkyu Kang47ea6ed2010-06-18 19:31:10 +0900224 defined (CONFIG_REVISION_TAG)
wdenk5779d8d2003-12-06 23:55:10 +0000225static void setup_start_tag (bd_t *bd)
wdenkc6097192002-11-03 00:24:07 +0000226{
wdenk5779d8d2003-12-06 23:55:10 +0000227 params = (struct tag *) bd->bi_boot_params;
wdenkc6097192002-11-03 00:24:07 +0000228
wdenk5779d8d2003-12-06 23:55:10 +0000229 params->hdr.tag = ATAG_CORE;
230 params->hdr.size = tag_size (tag_core);
wdenkc6097192002-11-03 00:24:07 +0000231
wdenk5779d8d2003-12-06 23:55:10 +0000232 params->u.core.flags = 0;
233 params->u.core.pagesize = 0;
234 params->u.core.rootdev = 0;
wdenkc6097192002-11-03 00:24:07 +0000235
wdenk5779d8d2003-12-06 23:55:10 +0000236 params = tag_next (params);
wdenkc6097192002-11-03 00:24:07 +0000237}
238
239
wdenk699b13a2002-11-03 18:03:52 +0000240#ifdef CONFIG_SETUP_MEMORY_TAGS
wdenk5779d8d2003-12-06 23:55:10 +0000241static void setup_memory_tags (bd_t *bd)
wdenkc6097192002-11-03 00:24:07 +0000242{
wdenk5779d8d2003-12-06 23:55:10 +0000243 int i;
wdenkc6097192002-11-03 00:24:07 +0000244
wdenk5779d8d2003-12-06 23:55:10 +0000245 for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
246 params->hdr.tag = ATAG_MEM;
247 params->hdr.size = tag_size (tag_mem32);
wdenkc6097192002-11-03 00:24:07 +0000248
wdenk5779d8d2003-12-06 23:55:10 +0000249 params->u.mem.start = bd->bi_dram[i].start;
250 params->u.mem.size = bd->bi_dram[i].size;
wdenkc6097192002-11-03 00:24:07 +0000251
wdenk5779d8d2003-12-06 23:55:10 +0000252 params = tag_next (params);
253 }
wdenkc6097192002-11-03 00:24:07 +0000254}
wdenk5779d8d2003-12-06 23:55:10 +0000255#endif /* CONFIG_SETUP_MEMORY_TAGS */
wdenkc6097192002-11-03 00:24:07 +0000256
257
wdenk5779d8d2003-12-06 23:55:10 +0000258static void setup_commandline_tag (bd_t *bd, char *commandline)
wdenkc6097192002-11-03 00:24:07 +0000259{
wdenk5779d8d2003-12-06 23:55:10 +0000260 char *p;
wdenkc6097192002-11-03 00:24:07 +0000261
wdenk109c0e32004-03-23 21:43:07 +0000262 if (!commandline)
263 return;
264
wdenk5779d8d2003-12-06 23:55:10 +0000265 /* eat leading white space */
266 for (p = commandline; *p == ' '; p++);
wdenkc6097192002-11-03 00:24:07 +0000267
wdenk5779d8d2003-12-06 23:55:10 +0000268 /* skip non-existent command lines so the kernel will still
269 * use its default command line.
270 */
271 if (*p == '\0')
272 return;
wdenkc6097192002-11-03 00:24:07 +0000273
wdenk5779d8d2003-12-06 23:55:10 +0000274 params->hdr.tag = ATAG_CMDLINE;
275 params->hdr.size =
276 (sizeof (struct tag_header) + strlen (p) + 1 + 4) >> 2;
wdenkc6097192002-11-03 00:24:07 +0000277
wdenk5779d8d2003-12-06 23:55:10 +0000278 strcpy (params->u.cmdline.cmdline, p);
wdenkc6097192002-11-03 00:24:07 +0000279
wdenk5779d8d2003-12-06 23:55:10 +0000280 params = tag_next (params);
wdenkc6097192002-11-03 00:24:07 +0000281}
282
283
wdenk699b13a2002-11-03 18:03:52 +0000284#ifdef CONFIG_INITRD_TAG
wdenk5779d8d2003-12-06 23:55:10 +0000285static void setup_initrd_tag (bd_t *bd, ulong initrd_start, ulong initrd_end)
wdenkc6097192002-11-03 00:24:07 +0000286{
wdenk5779d8d2003-12-06 23:55:10 +0000287 /* an ATAG_INITRD node tells the kernel where the compressed
288 * ramdisk can be found. ATAG_RDIMG is a better name, actually.
289 */
wdenk498b8db2004-04-18 22:26:17 +0000290 params->hdr.tag = ATAG_INITRD2;
wdenk5779d8d2003-12-06 23:55:10 +0000291 params->hdr.size = tag_size (tag_initrd);
wdenkc6097192002-11-03 00:24:07 +0000292
wdenk5779d8d2003-12-06 23:55:10 +0000293 params->u.initrd.start = initrd_start;
294 params->u.initrd.size = initrd_end - initrd_start;
wdenkc6097192002-11-03 00:24:07 +0000295
wdenk5779d8d2003-12-06 23:55:10 +0000296 params = tag_next (params);
wdenkc6097192002-11-03 00:24:07 +0000297}
wdenk5779d8d2003-12-06 23:55:10 +0000298#endif /* CONFIG_INITRD_TAG */
wdenkc6097192002-11-03 00:24:07 +0000299
wdenk3a574cb2005-05-19 22:39:42 +0000300#ifdef CONFIG_SERIAL_TAG
301void setup_serial_tag (struct tag **tmp)
302{
303 struct tag *params = *tmp;
304 struct tag_serialnr serialnr;
305 void get_board_serial(struct tag_serialnr *serialnr);
306
307 get_board_serial(&serialnr);
308 params->hdr.tag = ATAG_SERIAL;
309 params->hdr.size = tag_size (tag_serialnr);
310 params->u.serialnr.low = serialnr.low;
311 params->u.serialnr.high= serialnr.high;
312 params = tag_next (params);
313 *tmp = params;
314}
315#endif
316
wdenk289f9322005-01-12 00:15:14 +0000317#ifdef CONFIG_REVISION_TAG
318void setup_revision_tag(struct tag **in_params)
319{
320 u32 rev = 0;
wdenk289f9322005-01-12 00:15:14 +0000321 u32 get_board_rev(void);
322
323 rev = get_board_rev();
wdenk289f9322005-01-12 00:15:14 +0000324 params->hdr.tag = ATAG_REVISION;
325 params->hdr.size = tag_size (tag_revision);
326 params->u.revision.rev = rev;
327 params = tag_next (params);
328}
329#endif /* CONFIG_REVISION_TAG */
330
wdenk5779d8d2003-12-06 23:55:10 +0000331static void setup_end_tag (bd_t *bd)
wdenkc6097192002-11-03 00:24:07 +0000332{
wdenk5779d8d2003-12-06 23:55:10 +0000333 params->hdr.tag = ATAG_NONE;
334 params->hdr.size = 0;
wdenkc6097192002-11-03 00:24:07 +0000335}
Po-Yu Chuang3a8a83e2011-02-15 22:54:35 +0000336#endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */
wdenkc6097192002-11-03 00:24:07 +0000337
John Rigby2d1916e2010-10-13 13:57:36 -0600338static ulong get_sp(void)
339{
340 ulong ret;
341
342 asm("mov %0, sp" : "=r"(ret) : );
343 return ret;
344}