blob: 19d76d2cacc1b9a64a4733dd01d914f44ca6e17b [file] [log] [blame]
Wolfgang Denk7b64fef2006-10-24 14:21:16 +02001/*
2 * Copyright (C) 2004-2006 Atmel Corporation
3 *
4 * See file CREDITS for list of people who contributed to this
5 * project.
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License as
9 * published by the Free Software Foundation; either version 2 of
10 * the License, or (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
20 * MA 02111-1307 USA
21 */
22#include <common.h>
23#include <command.h>
24#include <malloc.h>
25#include <devices.h>
26#include <version.h>
27#include <net.h>
28
29#include <asm/initcalls.h>
30#include <asm/sections.h>
31
32#ifndef CONFIG_IDENT_STRING
33#define CONFIG_IDENT_STRING ""
34#endif
35
36DECLARE_GLOBAL_DATA_PTR;
37
38const char version_string[] =
39 U_BOOT_VERSION " (" __DATE__ " - " __TIME__ ") " CONFIG_IDENT_STRING;
40
41unsigned long monitor_flash_len;
42
43/*
44 * Begin and end of memory area for malloc(), and current "brk"
45 */
46static unsigned long mem_malloc_start = 0;
47static unsigned long mem_malloc_end = 0;
48static unsigned long mem_malloc_brk = 0;
49
Haavard Skinnemoen36d375f2008-08-31 18:24:24 +020050/* Weak aliases for optional board functions */
51static int __do_nothing(void)
52{
53 return 0;
54}
55int board_postclk_init(void) __attribute__((weak, alias("__do_nothing")));
56
Haavard Skinnemoen1f4f2122006-11-20 15:53:10 +010057/* The malloc area is right below the monitor image in RAM */
Wolfgang Denk7b64fef2006-10-24 14:21:16 +020058static void mem_malloc_init(void)
59{
Haavard Skinnemoen1f4f2122006-11-20 15:53:10 +010060 unsigned long monitor_addr;
61
62 monitor_addr = CFG_MONITOR_BASE + gd->reloc_off;
63 mem_malloc_end = monitor_addr;
64 mem_malloc_start = mem_malloc_end - CFG_MALLOC_LEN;
Wolfgang Denk7b64fef2006-10-24 14:21:16 +020065 mem_malloc_brk = mem_malloc_start;
66
67 printf("malloc: Using memory from 0x%08lx to 0x%08lx\n",
68 mem_malloc_start, mem_malloc_end);
69
70 memset ((void *)mem_malloc_start, 0,
71 mem_malloc_end - mem_malloc_start);
72}
73
74void *sbrk(ptrdiff_t increment)
75{
76 unsigned long old = mem_malloc_brk;
77 unsigned long new = old + increment;
78
79 if ((new < mem_malloc_start) || (new > mem_malloc_end))
80 return NULL;
81
82 mem_malloc_brk = new;
83 return ((void *)old);
84}
85
Haavard Skinnemoend5acb952006-12-17 15:39:15 +010086#ifdef CFG_DMA_ALLOC_LEN
87#include <asm/cacheflush.h>
88#include <asm/io.h>
89
90static unsigned long dma_alloc_start;
91static unsigned long dma_alloc_end;
92static unsigned long dma_alloc_brk;
93
94static void dma_alloc_init(void)
95{
96 unsigned long monitor_addr;
97
98 monitor_addr = CFG_MONITOR_BASE + gd->reloc_off;
99 dma_alloc_end = monitor_addr - CFG_MALLOC_LEN;
100 dma_alloc_start = dma_alloc_end - CFG_DMA_ALLOC_LEN;
101 dma_alloc_brk = dma_alloc_start;
102
103 printf("DMA: Using memory from 0x%08lx to 0x%08lx\n",
104 dma_alloc_start, dma_alloc_end);
105
106 dcache_invalidate_range(cached(dma_alloc_start),
107 dma_alloc_end - dma_alloc_start);
108}
109
110void *dma_alloc_coherent(size_t len, unsigned long *handle)
111{
112 unsigned long paddr = dma_alloc_brk;
113
114 if (dma_alloc_brk + len > dma_alloc_end)
115 return NULL;
116
117 dma_alloc_brk = ((paddr + len + CFG_DCACHE_LINESZ - 1)
118 & ~(CFG_DCACHE_LINESZ - 1));
119
120 *handle = paddr;
121 return uncached(paddr);
122}
123#else
124static inline void dma_alloc_init(void)
125{
126
127}
128#endif
129
Wolfgang Denk7b64fef2006-10-24 14:21:16 +0200130static int init_baudrate(void)
131{
132 char tmp[64];
133 int i;
134
135 i = getenv_r("baudrate", tmp, sizeof(tmp));
136 if (i > 0) {
137 gd->baudrate = simple_strtoul(tmp, NULL, 10);
138 } else {
139 gd->baudrate = CONFIG_BAUDRATE;
140 }
141 return 0;
142}
143
144
145static int display_banner (void)
146{
147 printf ("\n\n%s\n\n", version_string);
148 printf ("U-Boot code: %p -> %p data: %p -> %p\n",
149 _text, _etext, _data, _end);
150 return 0;
151}
152
153void hang(void)
154{
155 for (;;) ;
156}
157
158static int display_dram_config (void)
159{
160 int i;
161
162 puts ("DRAM Configuration:\n");
163
164 for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
165 printf ("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
166 print_size (gd->bd->bi_dram[i].size, "\n");
167 }
168
169 return 0;
170}
171
172static void display_flash_config (void)
173{
174 puts ("Flash: ");
175 print_size(gd->bd->bi_flashsize, " ");
176 printf("at address 0x%08lx\n", gd->bd->bi_flashstart);
177}
178
Haavard Skinnemoen12f099c2006-12-17 14:46:06 +0100179void board_init_f(ulong board_type)
Wolfgang Denk7b64fef2006-10-24 14:21:16 +0200180{
181 gd_t gd_data;
Haavard Skinnemoen1f4f2122006-11-20 15:53:10 +0100182 gd_t *new_gd;
183 bd_t *bd;
184 unsigned long *new_sp;
185 unsigned long monitor_len;
186 unsigned long monitor_addr;
187 unsigned long addr;
Haavard Skinnemoen12f099c2006-12-17 14:46:06 +0100188 long sdram_size;
Wolfgang Denk7b64fef2006-10-24 14:21:16 +0200189
190 /* Initialize the global data pointer */
191 memset(&gd_data, 0, sizeof(gd_data));
192 gd = &gd_data;
193
Wolfgang Denk7b64fef2006-10-24 14:21:16 +0200194 /* Perform initialization sequence */
Haavard Skinnemoendf548d32006-11-19 18:06:53 +0100195 board_early_init_f();
Wolfgang Denk7b64fef2006-10-24 14:21:16 +0200196 cpu_init();
Haavard Skinnemoen36d375f2008-08-31 18:24:24 +0200197 board_postclk_init();
Wolfgang Denk7b64fef2006-10-24 14:21:16 +0200198 env_init();
199 init_baudrate();
200 serial_init();
201 console_init_f();
202 display_banner();
Haavard Skinnemoen12f099c2006-12-17 14:46:06 +0100203 sdram_size = initdram(board_type);
Wolfgang Denk7b64fef2006-10-24 14:21:16 +0200204
Haavard Skinnemoen1f4f2122006-11-20 15:53:10 +0100205 /* If we have no SDRAM, we can't go on */
Haavard Skinnemoen12f099c2006-12-17 14:46:06 +0100206 if (sdram_size <= 0)
Haavard Skinnemoen1f4f2122006-11-20 15:53:10 +0100207 panic("No working SDRAM available\n");
208
209 /*
210 * Now that we have DRAM mapped and working, we can
211 * relocate the code and continue running from DRAM.
212 *
213 * Reserve memory at end of RAM for (top down in that order):
214 * - u-boot image
215 * - heap for malloc()
216 * - board info struct
217 * - global data struct
218 * - stack
219 */
Haavard Skinnemoen12f099c2006-12-17 14:46:06 +0100220 addr = CFG_SDRAM_BASE + sdram_size;
Haavard Skinnemoen1f4f2122006-11-20 15:53:10 +0100221 monitor_len = _end - _text;
222
223 /*
224 * Reserve memory for u-boot code, data and bss.
225 * Round down to next 4 kB limit.
226 */
227 addr -= monitor_len;
228 addr &= ~(4096UL - 1);
229 monitor_addr = addr;
230
231 /* Reserve memory for malloc() */
232 addr -= CFG_MALLOC_LEN;
233
Haavard Skinnemoend5acb952006-12-17 15:39:15 +0100234#ifdef CFG_DMA_ALLOC_LEN
235 /* Reserve DMA memory (must be cache aligned) */
236 addr &= ~(CFG_DCACHE_LINESZ - 1);
237 addr -= CFG_DMA_ALLOC_LEN;
238#endif
239
Haavard Skinnemoen1f4f2122006-11-20 15:53:10 +0100240 /* Allocate a Board Info struct on a word boundary */
241 addr -= sizeof(bd_t);
242 addr &= ~3UL;
243 gd->bd = bd = (bd_t *)addr;
244
245 /* Allocate a new global data copy on a 8-byte boundary. */
246 addr -= sizeof(gd_t);
247 addr &= ~7UL;
248 new_gd = (gd_t *)addr;
249
250 /* And finally, a new, bigger stack. */
251 new_sp = (unsigned long *)addr;
252 gd->stack_end = addr;
253 *(--new_sp) = 0;
254 *(--new_sp) = 0;
255
256 /*
257 * Initialize the board information struct with the
258 * information we have.
259 */
260 bd->bi_dram[0].start = CFG_SDRAM_BASE;
Haavard Skinnemoen12f099c2006-12-17 14:46:06 +0100261 bd->bi_dram[0].size = sdram_size;
Haavard Skinnemoen1f4f2122006-11-20 15:53:10 +0100262 bd->bi_baudrate = gd->baudrate;
263
264 memcpy(new_gd, gd, sizeof(gd_t));
265
266 relocate_code((unsigned long)new_sp, new_gd, monitor_addr);
Haavard Skinnemoenc841bee2006-11-18 17:15:30 +0100267}
268
269void board_init_r(gd_t *new_gd, ulong dest_addr)
270{
Haavard Skinnemoen1f4f2122006-11-20 15:53:10 +0100271 extern void malloc_bin_reloc (void);
272#ifndef CFG_ENV_IS_NOWHERE
273 extern char * env_name_spec;
274#endif
Haavard Skinnemoene0069272007-11-24 18:15:31 +0100275 char *s;
Haavard Skinnemoen1f4f2122006-11-20 15:53:10 +0100276 cmd_tbl_t *cmdtp;
277 bd_t *bd;
278
Haavard Skinnemoenc841bee2006-11-18 17:15:30 +0100279 gd = new_gd;
Haavard Skinnemoen1f4f2122006-11-20 15:53:10 +0100280 bd = gd->bd;
281
282 gd->flags |= GD_FLG_RELOC;
283 gd->reloc_off = dest_addr - CFG_MONITOR_BASE;
Haavard Skinnemoenc841bee2006-11-18 17:15:30 +0100284
285 monitor_flash_len = _edata - _text;
286
Haavard Skinnemoen1f4f2122006-11-20 15:53:10 +0100287 /*
288 * We have to relocate the command table manually
289 */
290 for (cmdtp = &__u_boot_cmd_start;
291 cmdtp != &__u_boot_cmd_end; cmdtp++) {
292 unsigned long addr;
Wolfgang Denk7b64fef2006-10-24 14:21:16 +0200293
Haavard Skinnemoen1f4f2122006-11-20 15:53:10 +0100294 addr = (unsigned long)cmdtp->cmd + gd->reloc_off;
295 cmdtp->cmd = (typeof(cmdtp->cmd))addr;
296
297 addr = (unsigned long)cmdtp->name + gd->reloc_off;
298 cmdtp->name = (typeof(cmdtp->name))addr;
299
300 if (cmdtp->usage) {
301 addr = (unsigned long)cmdtp->usage + gd->reloc_off;
302 cmdtp->usage = (typeof(cmdtp->usage))addr;
303 }
304#ifdef CFG_LONGHELP
305 if (cmdtp->help) {
306 addr = (unsigned long)cmdtp->help + gd->reloc_off;
307 cmdtp->help = (typeof(cmdtp->help))addr;
308 }
309#endif
310 }
311
312 /* there are some other pointer constants we must deal with */
313#ifndef CFG_ENV_IS_NOWHERE
314 env_name_spec += gd->reloc_off;
315#endif
316
317 timer_init();
318 mem_malloc_init();
319 malloc_bin_reloc();
Haavard Skinnemoend5acb952006-12-17 15:39:15 +0100320 dma_alloc_init();
Wolfgang Denk7b64fef2006-10-24 14:21:16 +0200321 board_init_info();
Haavard Skinnemoen7b624ad2007-10-06 18:55:35 +0200322
Haavard Skinnemoenacac4752007-12-14 16:51:22 +0100323 enable_interrupts();
324
Haavard Skinnemoen7b624ad2007-10-06 18:55:35 +0200325 bd->bi_flashstart = 0;
326 bd->bi_flashsize = 0;
327 bd->bi_flashoffset = 0;
328
329#ifndef CFG_NO_FLASH
330 bd->bi_flashstart = CFG_FLASH_BASE;
331 bd->bi_flashsize = flash_init();
332 bd->bi_flashoffset = (unsigned long)_edata - (unsigned long)_text;
Wolfgang Denk7b64fef2006-10-24 14:21:16 +0200333
Haavard Skinnemoen1f4f2122006-11-20 15:53:10 +0100334 if (bd->bi_flashsize)
Wolfgang Denk7b64fef2006-10-24 14:21:16 +0200335 display_flash_config();
Haavard Skinnemoen7b624ad2007-10-06 18:55:35 +0200336#endif
337
Haavard Skinnemoen1f4f2122006-11-20 15:53:10 +0100338 if (bd->bi_dram[0].size)
Wolfgang Denk7b64fef2006-10-24 14:21:16 +0200339 display_dram_config();
340
341 gd->bd->bi_boot_params = malloc(CFG_BOOTPARAMS_LEN);
342 if (!gd->bd->bi_boot_params)
343 puts("WARNING: Cannot allocate space for boot parameters\n");
344
345 /* initialize environment */
346 env_relocate();
347
Haavard Skinnemoene0069272007-11-24 18:15:31 +0100348 bd->bi_ip_addr = getenv_IPaddr ("ipaddr");
349
Wolfgang Denk7b64fef2006-10-24 14:21:16 +0200350 devices_init();
351 jumptable_init();
352 console_init_r();
353
Haavard Skinnemoene0069272007-11-24 18:15:31 +0100354 s = getenv("loadaddr");
355 if (s)
356 load_addr = simple_strtoul(s, NULL, 16);
357
Jon Loeliger67350562007-07-09 18:05:38 -0500358#if defined(CONFIG_CMD_NET)
Haavard Skinnemoene0069272007-11-24 18:15:31 +0100359 s = getenv("bootfile");
360 if (s)
361 copy_filename(BootFile, s, sizeof(BootFile));
Haavard Skinnemoen9a24f472006-12-17 17:14:30 +0100362#if defined(CONFIG_NET_MULTI)
363 puts("Net: ");
364#endif
365 eth_initialize(gd->bd);
366#endif
367
Wolfgang Denk7b64fef2006-10-24 14:21:16 +0200368 for (;;) {
369 main_loop();
370 }
371}