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Marian Balakowicz5d3cc552008-01-08 18:11:43 +01001/*
2 * (C) Copyright 2008 Semihalf
3 *
4 * (C) Copyright 2000-2006
5 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
6 *
7 * See file CREDITS for list of people who contributed to this
8 * project.
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License as
12 * published by the Free Software Foundation; either version 2 of
13 * the License, or (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
23 * MA 02111-1307 USA
24 */
25
Marian Balakowicz75824382008-01-31 13:20:06 +010026
Marian Balakowicz5d3cc552008-01-08 18:11:43 +010027#include <common.h>
28#include <watchdog.h>
29#include <command.h>
30#include <image.h>
31#include <malloc.h>
32#include <zlib.h>
33#include <bzlib.h>
34#include <environment.h>
35#include <asm/byteorder.h>
36
37#if defined(CONFIG_OF_LIBFDT)
38#include <fdt.h>
39#include <libfdt.h>
40#include <fdt_support.h>
Marian Balakowiczd3c5eb62008-01-31 13:20:08 +010041
Marian Balakowicz5d3cc552008-01-08 18:11:43 +010042#endif
43
Marian Balakowicz5d3cc552008-01-08 18:11:43 +010044#ifdef CFG_INIT_RAM_LOCK
45#include <asm/cache.h>
46#endif
47
Marian Balakowicz5d3cc552008-01-08 18:11:43 +010048DECLARE_GLOBAL_DATA_PTR;
Marian Balakowicz5d3cc552008-01-08 18:11:43 +010049
Kumar Galae822d7f2008-02-27 21:51:49 -060050extern ulong get_effective_memsize(void);
Marian Balakowiczceaed2b2008-01-31 13:57:17 +010051static ulong get_sp (void);
Marian Balakowiczb6b0fe62008-01-31 13:58:13 +010052static void set_clocks_in_mhz (bd_t *kbd);
Marian Balakowicz5d3cc552008-01-08 18:11:43 +010053
Kumar Galad3f2fa02008-02-27 21:51:50 -060054#ifndef CFG_LINUX_LOWMEM_MAX_SIZE
55#define CFG_LINUX_LOWMEM_MAX_SIZE (768*1024*1024)
56#endif
57
Kumar Gala40d7e992008-08-15 08:24:45 -050058__attribute__((noinline))
59int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
Marian Balakowicz5d3cc552008-01-08 18:11:43 +010060{
Kumar Galae822d7f2008-02-27 21:51:49 -060061 ulong sp;
Marian Balakowiczb6b0fe62008-01-31 13:58:13 +010062
Marian Balakowiczf13e7b22008-01-08 18:12:17 +010063 ulong initrd_start, initrd_end;
Kumar Galac4f94192008-08-15 08:24:37 -050064 ulong rd_len;
Kumar Galad3f2fa02008-02-27 21:51:50 -060065 ulong size;
Becky Bruce391fd932008-06-09 20:37:18 -050066 phys_size_t bootm_size;
Marian Balakowiczf13e7b22008-01-08 18:12:17 +010067
Kumar Galae822d7f2008-02-27 21:51:49 -060068 ulong cmd_start, cmd_end, bootmap_base;
Marian Balakowicz5d3cc552008-01-08 18:11:43 +010069 bd_t *kbd;
Kumar Galaa15b0712008-08-15 08:24:31 -050070 void (*kernel)(bd_t *, ulong r4, ulong r5, ulong r6,
71 ulong r7, ulong r8, ulong r9);
Kumar Galad2bc0952008-02-27 21:51:45 -060072 int ret;
Kumar Gala06a09912008-08-15 08:24:38 -050073 ulong of_size = images->ft_len;
Kumar Galae906cfa2008-08-15 08:24:40 -050074 struct lmb *lmb = &images->lmb;
Marian Balakowiczf13e7b22008-01-08 18:12:17 +010075
Marian Balakowicz4a2ad5f2008-01-31 13:20:07 +010076#if defined(CONFIG_OF_LIBFDT)
Kumar Gala06a09912008-08-15 08:24:38 -050077 char *of_flat_tree = images->ft_addr;
Marian Balakowicz5d3cc552008-01-08 18:11:43 +010078#endif
79
Kumar Galac160a952008-08-15 08:24:36 -050080 kernel = (void (*)(bd_t *, ulong, ulong, ulong,
81 ulong, ulong, ulong))images->ep;
82
Kumar Galad3f2fa02008-02-27 21:51:50 -060083 bootmap_base = getenv_bootm_low();
Becky Bruce391fd932008-06-09 20:37:18 -050084 bootm_size = getenv_bootm_size();
Kumar Galad3f2fa02008-02-27 21:51:50 -060085
86#ifdef DEBUG
Becky Bruce391fd932008-06-09 20:37:18 -050087 if (((u64)bootmap_base + bootm_size) >
88 (CFG_SDRAM_BASE + (u64)gd->ram_size))
Kumar Galad3f2fa02008-02-27 21:51:50 -060089 puts("WARNING: bootm_low + bootm_size exceed total memory\n");
Becky Bruce391fd932008-06-09 20:37:18 -050090 if ((bootmap_base + bootm_size) > get_effective_memsize())
Kumar Galad3f2fa02008-02-27 21:51:50 -060091 puts("WARNING: bootm_low + bootm_size exceed eff. memory\n");
92#endif
93
Becky Bruce391fd932008-06-09 20:37:18 -050094 size = min(bootm_size, get_effective_memsize());
Kumar Galad3f2fa02008-02-27 21:51:50 -060095 size = min(size, CFG_LINUX_LOWMEM_MAX_SIZE);
96
Becky Bruce391fd932008-06-09 20:37:18 -050097 if (size < bootm_size) {
Kumar Galad3f2fa02008-02-27 21:51:50 -060098 ulong base = bootmap_base + size;
Andrew Klossnerdc4b0b32008-07-07 06:41:14 -070099 printf("WARNING: adjusting available memory to %lx\n", size);
Becky Bruce391fd932008-06-09 20:37:18 -0500100 lmb_reserve(lmb, base, bootm_size - size);
Kumar Galad3f2fa02008-02-27 21:51:50 -0600101 }
Kumar Galae822d7f2008-02-27 21:51:49 -0600102
Marian Balakowicz5d3cc552008-01-08 18:11:43 +0100103 /*
104 * Booting a (Linux) kernel image
105 *
106 * Allocate space for command line and board info - the
107 * address should be as high as possible within the reach of
108 * the kernel (see CFG_BOOTMAPSZ settings), but in unused
109 * memory, which means far enough below the current stack
110 * pointer.
111 */
Marian Balakowiczb6b0fe62008-01-31 13:58:13 +0100112 sp = get_sp();
Kumar Galad3f2fa02008-02-27 21:51:50 -0600113 debug ("## Current stack ends at 0x%08lx\n", sp);
Marian Balakowicz5d3cc552008-01-08 18:11:43 +0100114
Kumar Galae822d7f2008-02-27 21:51:49 -0600115 /* adjust sp by 1K to be safe */
116 sp -= 1024;
117 lmb_reserve(lmb, sp, (CFG_SDRAM_BASE + get_effective_memsize() - sp));
Marian Balakowicz5d3cc552008-01-08 18:11:43 +0100118
Kumar Gala27953492008-02-27 21:51:44 -0600119 if (!of_size) {
120 /* allocate space and init command line */
Marian Balakowicz9a4daad2008-02-29 14:58:34 +0100121 ret = boot_get_cmdline (lmb, &cmd_start, &cmd_end, bootmap_base);
Kumar Galae822d7f2008-02-27 21:51:49 -0600122 if (ret) {
123 puts("ERROR with allocation of cmdline\n");
124 goto error;
125 }
Kumar Gala27953492008-02-27 21:51:44 -0600126
127 /* allocate space for kernel copy of board info */
Marian Balakowicz9a4daad2008-02-29 14:58:34 +0100128 ret = boot_get_kbd (lmb, &kbd, bootmap_base);
Kumar Galae822d7f2008-02-27 21:51:49 -0600129 if (ret) {
130 puts("ERROR with allocation of kernel bd\n");
131 goto error;
132 }
Kumar Gala27953492008-02-27 21:51:44 -0600133 set_clocks_in_mhz(kbd);
134 }
Marian Balakowicz5d3cc552008-01-08 18:11:43 +0100135
Kumar Galac4f94192008-08-15 08:24:37 -0500136 rd_len = images->rd_end - images->rd_start;
Marian Balakowicz5d3cc552008-01-08 18:11:43 +0100137
Marian Balakowicz4a2ad5f2008-01-31 13:20:07 +0100138#if defined(CONFIG_OF_LIBFDT)
Kumar Gala06a09912008-08-15 08:24:38 -0500139 ret = boot_relocate_fdt(lmb, bootmap_base, &of_flat_tree, &of_size);
140 if (ret)
141 goto error;
Marian Balakowicz4a2ad5f2008-01-31 13:20:07 +0100142
Marian Balakowicz5d3cc552008-01-08 18:11:43 +0100143 /*
144 * Add the chosen node if it doesn't exist, add the env and bd_t
145 * if the user wants it (the logic is in the subroutines).
146 */
Marian Balakowiczd2ced9e2008-02-04 08:28:17 +0100147 if (of_size) {
Kumar Galad2bc0952008-02-27 21:51:45 -0600148 /* pass in dummy initrd info, we'll fix up later */
Kumar Galac4f94192008-08-15 08:24:37 -0500149 if (fdt_chosen(of_flat_tree, images->rd_start, images->rd_end, 0) < 0) {
Kumar Gala06a09912008-08-15 08:24:38 -0500150 puts ("ERROR: ");
151 puts ("/chosen node create failed");
152 puts (" - must RESET the board to recover.\n");
Kumar Gala274cea22008-02-27 21:51:46 -0600153 goto error;
Marian Balakowicz5d3cc552008-01-08 18:11:43 +0100154 }
Marian Balakowicz5d3cc552008-01-08 18:11:43 +0100155#ifdef CONFIG_OF_BOARD_SETUP
156 /* Call the board-specific fixup routine */
157 ft_board_setup(of_flat_tree, gd->bd);
158#endif
159 }
Andy Fleming41c5eaa2008-06-16 13:58:56 -0500160
161 /* Fixup the fdt memreserve now that we know how big it is */
162 if (of_flat_tree) {
Andy Fleming41c5eaa2008-06-16 13:58:56 -0500163 /* Delete the old LMB reservation */
Andy Fleming98874ff2008-07-07 14:24:39 -0500164 lmb_free(lmb, (phys_addr_t)(u32)of_flat_tree,
165 (phys_size_t)fdt_totalsize(of_flat_tree));
Andy Fleming41c5eaa2008-06-16 13:58:56 -0500166
Kumar Gala3082d232008-08-15 08:24:42 -0500167 ret = fdt_resize(of_flat_tree);
168 if (ret < 0)
169 goto error;
170 of_size = ret;
Andy Fleming41c5eaa2008-06-16 13:58:56 -0500171
172 /* Create a new LMB reservation */
173 lmb_reserve(lmb, (ulong)of_flat_tree, of_size);
174 }
Marian Balakowicz4a2ad5f2008-01-31 13:20:07 +0100175#endif /* CONFIG_OF_LIBFDT */
Marian Balakowiczd45d5a12008-01-08 18:11:43 +0100176
Kumar Galac4f94192008-08-15 08:24:37 -0500177 ret = boot_ramdisk_high (lmb, images->rd_start, rd_len, &initrd_start, &initrd_end);
Kumar Galae822d7f2008-02-27 21:51:49 -0600178 if (ret)
179 goto error;
Kumar Galad2bc0952008-02-27 21:51:45 -0600180
181#if defined(CONFIG_OF_LIBFDT)
182 /* fixup the initrd now that we know where it should be */
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500183 if ((of_flat_tree) && (initrd_start && initrd_end))
184 fdt_initrd(of_flat_tree, initrd_start, initrd_end, 1);
Kumar Galad2bc0952008-02-27 21:51:45 -0600185#endif
Marian Balakowicz5d3cc552008-01-08 18:11:43 +0100186 debug ("## Transferring control to Linux (at address %08lx) ...\n",
187 (ulong)kernel);
188
189 show_boot_progress (15);
190
191#if defined(CFG_INIT_RAM_LOCK) && !defined(CONFIG_E500)
192 unlock_ram_in_cache();
193#endif
194
Marian Balakowicz4a2ad5f2008-01-31 13:20:07 +0100195#if defined(CONFIG_OF_LIBFDT)
Marian Balakowicz5d3cc552008-01-08 18:11:43 +0100196 if (of_flat_tree) { /* device tree; boot new style */
197 /*
198 * Linux Kernel Parameters (passing device tree):
Kumar Galaa15b0712008-08-15 08:24:31 -0500199 * r3: pointer to the fdt
200 * r4: 0
201 * r5: 0
202 * r6: epapr magic
203 * r7: size of IMA in bytes
204 * r8: 0
205 * r9: 0
Marian Balakowicz5d3cc552008-01-08 18:11:43 +0100206 */
Kumar Galaa15b0712008-08-15 08:24:31 -0500207#if defined(CONFIG_85xx) || defined(CONFIG_440)
208 #define EPAPR_MAGIC (0x45504150)
209#else
210 #define EPAPR_MAGIC (0x65504150)
211#endif
212
Marian Balakowiczbc8ed482008-03-12 10:32:53 +0100213 debug (" Booting using OF flat tree...\n");
Kumar Galaa15b0712008-08-15 08:24:31 -0500214 (*kernel) ((bd_t *)of_flat_tree, 0, 0, EPAPR_MAGIC,
215 CFG_BOOTMAPSZ, 0, 0);
Marian Balakowicz5d3cc552008-01-08 18:11:43 +0100216 /* does not return */
Marian Balakowiczbc8ed482008-03-12 10:32:53 +0100217 } else
Marian Balakowicz5d3cc552008-01-08 18:11:43 +0100218#endif
Marian Balakowiczbc8ed482008-03-12 10:32:53 +0100219 {
220 /*
221 * Linux Kernel Parameters (passing board info data):
222 * r3: ptr to board info data
223 * r4: initrd_start or 0 if no initrd
224 * r5: initrd_end - unused if r4 is 0
225 * r6: Start of command line string
226 * r7: End of command line string
Kumar Galaa15b0712008-08-15 08:24:31 -0500227 * r8: 0
228 * r9: 0
Marian Balakowiczbc8ed482008-03-12 10:32:53 +0100229 */
230 debug (" Booting using board info...\n");
Kumar Galaa15b0712008-08-15 08:24:31 -0500231 (*kernel) (kbd, initrd_start, initrd_end,
232 cmd_start, cmd_end, 0, 0);
Marian Balakowiczbc8ed482008-03-12 10:32:53 +0100233 /* does not return */
234 }
Kumar Gala40d7e992008-08-15 08:24:45 -0500235 return 1;
Kumar Gala274cea22008-02-27 21:51:46 -0600236
237error:
Kumar Gala40d7e992008-08-15 08:24:45 -0500238 return 1;
Marian Balakowicz5d3cc552008-01-08 18:11:43 +0100239}
Marian Balakowiczd3c5eb62008-01-31 13:20:08 +0100240
Marian Balakowiczceaed2b2008-01-31 13:57:17 +0100241static ulong get_sp (void)
242{
243 ulong sp;
244
245 asm( "mr %0,1": "=r"(sp) : );
246 return sp;
247}
248
Marian Balakowiczb6b0fe62008-01-31 13:58:13 +0100249static void set_clocks_in_mhz (bd_t *kbd)
250{
251 char *s;
252
253 if ((s = getenv ("clocks_in_mhz")) != NULL) {
254 /* convert all clock information to MHz */
255 kbd->bi_intfreq /= 1000000L;
256 kbd->bi_busfreq /= 1000000L;
257#if defined(CONFIG_MPC8220)
258 kbd->bi_inpfreq /= 1000000L;
259 kbd->bi_pcifreq /= 1000000L;
260 kbd->bi_pevfreq /= 1000000L;
261 kbd->bi_flbfreq /= 1000000L;
262 kbd->bi_vcofreq /= 1000000L;
263#endif
264#if defined(CONFIG_CPM2)
265 kbd->bi_cpmfreq /= 1000000L;
266 kbd->bi_brgfreq /= 1000000L;
267 kbd->bi_sccfreq /= 1000000L;
Wolfgang Denk438a4c12008-03-26 11:48:46 +0100268 kbd->bi_vco /= 1000000L;
Marian Balakowiczb6b0fe62008-01-31 13:58:13 +0100269#endif
270#if defined(CONFIG_MPC5xxx)
271 kbd->bi_ipbfreq /= 1000000L;
272 kbd->bi_pcifreq /= 1000000L;
273#endif /* CONFIG_MPC5xxx */
274 }
275}