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,
29 #include <asm/initcalls.h>
30 #include <asm/sections.h>
32 #ifndef CONFIG_IDENT_STRING
33 #define CONFIG_IDENT_STRING ""
36 DECLARE_GLOBAL_DATA_PTR;
38 const char version_string[] =
39 U_BOOT_VERSION " (" __DATE__ " - " __TIME__ ") " CONFIG_IDENT_STRING;
41 unsigned long monitor_flash_len;
44 * Begin and end of memory area for malloc(), and current "brk"
46 static unsigned long mem_malloc_start = 0;
47 static unsigned long mem_malloc_end = 0;
48 static unsigned long mem_malloc_brk = 0;
50 /* The malloc area is right below the monitor image in RAM */
51 static void mem_malloc_init(void)
53 unsigned long monitor_addr;
55 monitor_addr = CFG_MONITOR_BASE + gd->reloc_off;
56 mem_malloc_end = monitor_addr;
57 mem_malloc_start = mem_malloc_end - CFG_MALLOC_LEN;
58 mem_malloc_brk = mem_malloc_start;
60 printf("malloc: Using memory from 0x%08lx to 0x%08lx\n",
61 mem_malloc_start, mem_malloc_end);
63 memset ((void *)mem_malloc_start, 0,
64 mem_malloc_end - mem_malloc_start);
67 void *sbrk(ptrdiff_t increment)
69 unsigned long old = mem_malloc_brk;
70 unsigned long new = old + increment;
72 if ((new < mem_malloc_start) || (new > mem_malloc_end))
79 #ifdef CFG_DMA_ALLOC_LEN
80 #include <asm/cacheflush.h>
83 static unsigned long dma_alloc_start;
84 static unsigned long dma_alloc_end;
85 static unsigned long dma_alloc_brk;
87 static void dma_alloc_init(void)
89 unsigned long monitor_addr;
91 monitor_addr = CFG_MONITOR_BASE + gd->reloc_off;
92 dma_alloc_end = monitor_addr - CFG_MALLOC_LEN;
93 dma_alloc_start = dma_alloc_end - CFG_DMA_ALLOC_LEN;
94 dma_alloc_brk = dma_alloc_start;
96 printf("DMA: Using memory from 0x%08lx to 0x%08lx\n",
97 dma_alloc_start, dma_alloc_end);
99 dcache_invalidate_range(cached(dma_alloc_start),
100 dma_alloc_end - dma_alloc_start);
103 void *dma_alloc_coherent(size_t len, unsigned long *handle)
105 unsigned long paddr = dma_alloc_brk;
107 if (dma_alloc_brk + len > dma_alloc_end)
110 dma_alloc_brk = ((paddr + len + CFG_DCACHE_LINESZ - 1)
111 & ~(CFG_DCACHE_LINESZ - 1));
114 return uncached(paddr);
117 static inline void dma_alloc_init(void)
123 static int init_baudrate(void)
128 i = getenv_r("baudrate", tmp, sizeof(tmp));
130 gd->baudrate = simple_strtoul(tmp, NULL, 10);
132 gd->baudrate = CONFIG_BAUDRATE;
138 static int display_banner (void)
140 printf ("\n\n%s\n\n", version_string);
141 printf ("U-Boot code: %p -> %p data: %p -> %p\n",
142 _text, _etext, _data, _end);
151 static int display_dram_config (void)
155 puts ("DRAM Configuration:\n");
157 for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
158 printf ("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
159 print_size (gd->bd->bi_dram[i].size, "\n");
165 static void display_flash_config (void)
168 print_size(gd->bd->bi_flashsize, " ");
169 printf("at address 0x%08lx\n", gd->bd->bi_flashstart);
172 void board_init_f(ulong board_type)
177 unsigned long *new_sp;
178 unsigned long monitor_len;
179 unsigned long monitor_addr;
183 /* Initialize the global data pointer */
184 memset(&gd_data, 0, sizeof(gd_data));
187 /* Perform initialization sequence */
188 board_early_init_f();
195 sdram_size = initdram(board_type);
197 /* If we have no SDRAM, we can't go on */
199 panic("No working SDRAM available\n");
202 * Now that we have DRAM mapped and working, we can
203 * relocate the code and continue running from DRAM.
205 * Reserve memory at end of RAM for (top down in that order):
207 * - heap for malloc()
208 * - board info struct
209 * - global data struct
212 addr = CFG_SDRAM_BASE + sdram_size;
213 monitor_len = _end - _text;
216 * Reserve memory for u-boot code, data and bss.
217 * Round down to next 4 kB limit.
220 addr &= ~(4096UL - 1);
223 /* Reserve memory for malloc() */
224 addr -= CFG_MALLOC_LEN;
226 #ifdef CFG_DMA_ALLOC_LEN
227 /* Reserve DMA memory (must be cache aligned) */
228 addr &= ~(CFG_DCACHE_LINESZ - 1);
229 addr -= CFG_DMA_ALLOC_LEN;
232 /* Allocate a Board Info struct on a word boundary */
233 addr -= sizeof(bd_t);
235 gd->bd = bd = (bd_t *)addr;
237 /* Allocate a new global data copy on a 8-byte boundary. */
238 addr -= sizeof(gd_t);
240 new_gd = (gd_t *)addr;
242 /* And finally, a new, bigger stack. */
243 new_sp = (unsigned long *)addr;
244 gd->stack_end = addr;
249 * Initialize the board information struct with the
250 * information we have.
252 bd->bi_dram[0].start = CFG_SDRAM_BASE;
253 bd->bi_dram[0].size = sdram_size;
254 bd->bi_baudrate = gd->baudrate;
256 memcpy(new_gd, gd, sizeof(gd_t));
258 relocate_code((unsigned long)new_sp, new_gd, monitor_addr);
261 void board_init_r(gd_t *new_gd, ulong dest_addr)
263 extern void malloc_bin_reloc (void);
264 #ifndef CFG_ENV_IS_NOWHERE
265 extern char * env_name_spec;
273 gd->flags |= GD_FLG_RELOC;
274 gd->reloc_off = dest_addr - CFG_MONITOR_BASE;
276 monitor_flash_len = _edata - _text;
279 * We have to relocate the command table manually
281 for (cmdtp = &__u_boot_cmd_start;
282 cmdtp != &__u_boot_cmd_end; cmdtp++) {
285 addr = (unsigned long)cmdtp->cmd + gd->reloc_off;
286 cmdtp->cmd = (typeof(cmdtp->cmd))addr;
288 addr = (unsigned long)cmdtp->name + gd->reloc_off;
289 cmdtp->name = (typeof(cmdtp->name))addr;
292 addr = (unsigned long)cmdtp->usage + gd->reloc_off;
293 cmdtp->usage = (typeof(cmdtp->usage))addr;
297 addr = (unsigned long)cmdtp->help + gd->reloc_off;
298 cmdtp->help = (typeof(cmdtp->help))addr;
303 /* there are some other pointer constants we must deal with */
304 #ifndef CFG_ENV_IS_NOWHERE
305 env_name_spec += gd->reloc_off;
314 bd->bi_flashstart = 0;
315 bd->bi_flashsize = 0;
316 bd->bi_flashoffset = 0;
319 bd->bi_flashstart = CFG_FLASH_BASE;
320 bd->bi_flashsize = flash_init();
321 bd->bi_flashoffset = (unsigned long)_edata - (unsigned long)_text;
323 if (bd->bi_flashsize)
324 display_flash_config();
327 if (bd->bi_dram[0].size)
328 display_dram_config();
330 gd->bd->bi_boot_params = malloc(CFG_BOOTPARAMS_LEN);
331 if (!gd->bd->bi_boot_params)
332 puts("WARNING: Cannot allocate space for boot parameters\n");
334 /* initialize environment */
341 #if defined(CONFIG_CMD_NET)
342 #if defined(CONFIG_NET_MULTI)
345 eth_initialize(gd->bd);