2 * Copyright (C) 2004-2006 Atmel Corporation
4 * See file CREDITS for list of people who contributed to this
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.
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.
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,
26 #include <timestamp.h>
30 #include <asm/initcalls.h>
31 #include <asm/sections.h>
33 #ifndef CONFIG_IDENT_STRING
34 #define CONFIG_IDENT_STRING ""
37 DECLARE_GLOBAL_DATA_PTR;
39 const char version_string[] =
40 U_BOOT_VERSION " ("U_BOOT_DATE" - "U_BOOT_TIME") " CONFIG_IDENT_STRING;
42 unsigned long monitor_flash_len;
45 * Begin and end of memory area for malloc(), and current "brk"
47 static unsigned long mem_malloc_start = 0;
48 static unsigned long mem_malloc_end = 0;
49 static unsigned long mem_malloc_brk = 0;
51 /* Weak aliases for optional board functions */
52 static int __do_nothing(void)
56 int board_postclk_init(void) __attribute__((weak, alias("__do_nothing")));
57 int board_early_init_r(void) __attribute__((weak, alias("__do_nothing")));
59 /* The malloc area is right below the monitor image in RAM */
60 static void mem_malloc_init(void)
62 unsigned long monitor_addr;
64 monitor_addr = CONFIG_SYS_MONITOR_BASE + gd->reloc_off;
65 mem_malloc_end = monitor_addr;
66 mem_malloc_start = mem_malloc_end - CONFIG_SYS_MALLOC_LEN;
67 mem_malloc_brk = mem_malloc_start;
69 printf("malloc: Using memory from 0x%08lx to 0x%08lx\n",
70 mem_malloc_start, mem_malloc_end);
72 memset ((void *)mem_malloc_start, 0,
73 mem_malloc_end - mem_malloc_start);
76 void *sbrk(ptrdiff_t increment)
78 unsigned long old = mem_malloc_brk;
79 unsigned long new = old + increment;
81 if ((new < mem_malloc_start) || (new > mem_malloc_end))
88 #ifdef CONFIG_SYS_DMA_ALLOC_LEN
89 #include <asm/arch/cacheflush.h>
92 static unsigned long dma_alloc_start;
93 static unsigned long dma_alloc_end;
94 static unsigned long dma_alloc_brk;
96 static void dma_alloc_init(void)
98 unsigned long monitor_addr;
100 monitor_addr = CONFIG_SYS_MONITOR_BASE + gd->reloc_off;
101 dma_alloc_end = monitor_addr - CONFIG_SYS_MALLOC_LEN;
102 dma_alloc_start = dma_alloc_end - CONFIG_SYS_DMA_ALLOC_LEN;
103 dma_alloc_brk = dma_alloc_start;
105 printf("DMA: Using memory from 0x%08lx to 0x%08lx\n",
106 dma_alloc_start, dma_alloc_end);
108 dcache_invalidate_range(cached(dma_alloc_start),
109 dma_alloc_end - dma_alloc_start);
112 void *dma_alloc_coherent(size_t len, unsigned long *handle)
114 unsigned long paddr = dma_alloc_brk;
116 if (dma_alloc_brk + len > dma_alloc_end)
119 dma_alloc_brk = ((paddr + len + CONFIG_SYS_DCACHE_LINESZ - 1)
120 & ~(CONFIG_SYS_DCACHE_LINESZ - 1));
123 return uncached(paddr);
126 static inline void dma_alloc_init(void)
132 static int init_baudrate(void)
137 i = getenv_r("baudrate", tmp, sizeof(tmp));
139 gd->baudrate = simple_strtoul(tmp, NULL, 10);
141 gd->baudrate = CONFIG_BAUDRATE;
147 static int display_banner (void)
149 printf ("\n\n%s\n\n", version_string);
150 printf ("U-Boot code: %p -> %p data: %p -> %p\n",
151 _text, _etext, _data, _end);
160 static int display_dram_config (void)
164 puts ("DRAM Configuration:\n");
166 for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
167 printf ("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
168 print_size (gd->bd->bi_dram[i].size, "\n");
174 static void display_flash_config (void)
177 print_size(gd->bd->bi_flashsize, " ");
178 printf("at address 0x%08lx\n", gd->bd->bi_flashstart);
181 void board_init_f(ulong board_type)
186 unsigned long *new_sp;
187 unsigned long monitor_len;
188 unsigned long monitor_addr;
192 /* Initialize the global data pointer */
193 memset(&gd_data, 0, sizeof(gd_data));
196 /* Perform initialization sequence */
197 board_early_init_f();
199 board_postclk_init();
205 sdram_size = initdram(board_type);
207 /* If we have no SDRAM, we can't go on */
209 panic("No working SDRAM available\n");
212 * Now that we have DRAM mapped and working, we can
213 * relocate the code and continue running from DRAM.
215 * Reserve memory at end of RAM for (top down in that order):
217 * - heap for malloc()
218 * - board info struct
219 * - global data struct
222 addr = CONFIG_SYS_SDRAM_BASE + sdram_size;
223 monitor_len = _end - _text;
226 * Reserve memory for u-boot code, data and bss.
227 * Round down to next 4 kB limit.
230 addr &= ~(4096UL - 1);
233 /* Reserve memory for malloc() */
234 addr -= CONFIG_SYS_MALLOC_LEN;
236 #ifdef CONFIG_SYS_DMA_ALLOC_LEN
237 /* Reserve DMA memory (must be cache aligned) */
238 addr &= ~(CONFIG_SYS_DCACHE_LINESZ - 1);
239 addr -= CONFIG_SYS_DMA_ALLOC_LEN;
242 /* Allocate a Board Info struct on a word boundary */
243 addr -= sizeof(bd_t);
245 gd->bd = bd = (bd_t *)addr;
247 /* Allocate a new global data copy on a 8-byte boundary. */
248 addr -= sizeof(gd_t);
250 new_gd = (gd_t *)addr;
252 /* And finally, a new, bigger stack. */
253 new_sp = (unsigned long *)addr;
254 gd->stack_end = addr;
259 * Initialize the board information struct with the
260 * information we have.
262 bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE;
263 bd->bi_dram[0].size = sdram_size;
264 bd->bi_baudrate = gd->baudrate;
266 memcpy(new_gd, gd, sizeof(gd_t));
268 relocate_code((unsigned long)new_sp, new_gd, monitor_addr);
271 void board_init_r(gd_t *new_gd, ulong dest_addr)
273 extern void malloc_bin_reloc (void);
274 #ifndef CONFIG_ENV_IS_NOWHERE
275 extern char * env_name_spec;
284 gd->flags |= GD_FLG_RELOC;
285 gd->reloc_off = dest_addr - CONFIG_SYS_MONITOR_BASE;
287 board_early_init_r();
289 monitor_flash_len = _edata - _text;
292 * We have to relocate the command table manually
294 for (cmdtp = &__u_boot_cmd_start;
295 cmdtp != &__u_boot_cmd_end; cmdtp++) {
298 addr = (unsigned long)cmdtp->cmd + gd->reloc_off;
299 cmdtp->cmd = (typeof(cmdtp->cmd))addr;
301 addr = (unsigned long)cmdtp->name + gd->reloc_off;
302 cmdtp->name = (typeof(cmdtp->name))addr;
305 addr = (unsigned long)cmdtp->usage + gd->reloc_off;
306 cmdtp->usage = (typeof(cmdtp->usage))addr;
308 #ifdef CONFIG_SYS_LONGHELP
310 addr = (unsigned long)cmdtp->help + gd->reloc_off;
311 cmdtp->help = (typeof(cmdtp->help))addr;
316 /* there are some other pointer constants we must deal with */
317 #ifndef CONFIG_ENV_IS_NOWHERE
318 env_name_spec += gd->reloc_off;
328 bd->bi_flashstart = 0;
329 bd->bi_flashsize = 0;
330 bd->bi_flashoffset = 0;
332 #ifndef CONFIG_SYS_NO_FLASH
333 bd->bi_flashstart = CONFIG_SYS_FLASH_BASE;
334 bd->bi_flashsize = flash_init();
335 bd->bi_flashoffset = (unsigned long)_edata - (unsigned long)_text;
337 if (bd->bi_flashsize)
338 display_flash_config();
341 if (bd->bi_dram[0].size)
342 display_dram_config();
344 gd->bd->bi_boot_params = malloc(CONFIG_SYS_BOOTPARAMS_LEN);
345 if (!gd->bd->bi_boot_params)
346 puts("WARNING: Cannot allocate space for boot parameters\n");
348 /* initialize environment */
351 bd->bi_ip_addr = getenv_IPaddr ("ipaddr");
357 s = getenv("loadaddr");
359 load_addr = simple_strtoul(s, NULL, 16);
361 #if defined(CONFIG_CMD_NET)
362 s = getenv("bootfile");
364 copy_filename(BootFile, s, sizeof(BootFile));
365 #if defined(CONFIG_NET_MULTI)
368 eth_initialize(gd->bd);