3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * See file CREDITS for list of people who contributed to this
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
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
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
30 #include <environment.h>
32 DECLARE_GLOBAL_DATA_PTR;
34 #if ( ((CFG_ENV_ADDR+CFG_ENV_SIZE) < CFG_MONITOR_BASE) || \
35 (CFG_ENV_ADDR >= (CFG_MONITOR_BASE + CFG_MONITOR_LEN)) ) || \
36 defined(CFG_ENV_IS_IN_NVRAM)
37 #define TOTAL_MALLOC_LEN (CFG_MALLOC_LEN + CFG_ENV_SIZE)
39 #define TOTAL_MALLOC_LEN CFG_MALLOC_LEN
44 extern int timer_init(void);
46 extern int incaip_set_cpuclk(void);
48 extern ulong uboot_end_data;
49 extern ulong uboot_end;
51 ulong monitor_flash_len;
53 const char version_string[] =
54 U_BOOT_VERSION" (" __DATE__ " - " __TIME__ ")";
56 static char *failed = "*** failed ***\n";
59 * Begin and End of memory area for malloc(), and current "brk"
61 static ulong mem_malloc_start;
62 static ulong mem_malloc_end;
63 static ulong mem_malloc_brk;
66 * mips_io_port_base is the begin of the address space to which x86 style
67 * I/O ports are mapped.
69 unsigned long mips_io_port_base = -1;
72 * The Malloc area is immediately below the monitor copy in DRAM
74 static void mem_malloc_init (void)
76 ulong dest_addr = CFG_MONITOR_BASE + gd->reloc_off;
78 mem_malloc_end = dest_addr;
79 mem_malloc_start = dest_addr - TOTAL_MALLOC_LEN;
80 mem_malloc_brk = mem_malloc_start;
82 memset ((void *) mem_malloc_start,
84 mem_malloc_end - mem_malloc_start);
87 void *sbrk (ptrdiff_t increment)
89 ulong old = mem_malloc_brk;
90 ulong new = old + increment;
92 if ((new < mem_malloc_start) || (new > mem_malloc_end)) {
96 return ((void *) old);
100 static int init_func_ram (void)
102 #ifdef CONFIG_BOARD_TYPES
103 int board_type = gd->board_type;
105 int board_type = 0; /* use dummy arg */
109 if ((gd->ram_size = initdram (board_type)) > 0) {
110 print_size (gd->ram_size, "\n");
117 static int display_banner(void)
120 printf ("\n\n%s\n\n", version_string);
125 static void display_flash_config(ulong size)
128 print_size (size, "\n");
132 static int init_baudrate (void)
134 char tmp[64]; /* long enough for environment variables */
135 int i = getenv_r ("baudrate", tmp, sizeof (tmp));
137 gd->baudrate = (i > 0)
138 ? (int) simple_strtoul (tmp, NULL, 10)
146 * Breath some life into the board...
148 * The first part of initialization is running from Flash memory;
149 * its main purpose is to initialize the RAM so that we
150 * can relocate the monitor code to RAM.
154 * All attempts to come up with a "common" initialization sequence
155 * that works for all boards and architectures failed: some of the
156 * requirements are just _too_ different. To get rid of the resulting
157 * mess of board dependend #ifdef'ed code we now make the whole
158 * initialization sequence configurable to the user.
160 * The requirements for any new initalization function is simple: it
161 * receives a pointer to the "global data" structure as it's only
162 * argument, and returns an integer return code, where 0 means
163 * "continue" and != 0 means "fatal error, hang the system".
165 typedef int (init_fnc_t) (void);
167 init_fnc_t *init_sequence[] = {
169 env_init, /* initialize environment */
170 #ifdef CONFIG_INCA_IP
171 incaip_set_cpuclk, /* set cpu clock according to environment variable */
173 init_baudrate, /* initialze baudrate settings */
174 serial_init, /* serial communications setup */
176 display_banner, /* say that we are here */
183 void board_init_f(ulong bootflag)
187 init_fnc_t **init_fnc_ptr;
188 ulong addr, addr_sp, len = (ulong)&uboot_end - CFG_MONITOR_BASE;
191 void copy_code (ulong);
194 /* Pointer is writable since we allocated a register for it.
197 /* compiler optimization barrier needed for GCC >= 3.4 */
198 __asm__ __volatile__("": : :"memory");
200 memset ((void *)gd, 0, sizeof (gd_t));
202 for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
203 if ((*init_fnc_ptr)() != 0) {
209 * Now that we have DRAM mapped and working, we can
210 * relocate the code and continue running from DRAM.
212 addr = CFG_SDRAM_BASE + gd->ram_size;
214 /* We can reserve some RAM "on top" here.
217 /* round down to next 4 kB limit.
220 debug ("Top of RAM usable for U-Boot at: %08lx\n", addr);
222 /* Reserve memory for U-Boot code, data & bss
223 * round down to next 16 kB limit
226 addr &= ~(16 * 1024 - 1);
228 debug ("Reserving %ldk for U-Boot at: %08lx\n", len >> 10, addr);
230 /* Reserve memory for malloc() arena.
232 addr_sp = addr - TOTAL_MALLOC_LEN;
233 debug ("Reserving %dk for malloc() at: %08lx\n",
234 TOTAL_MALLOC_LEN >> 10, addr_sp);
237 * (permanently) allocate a Board Info struct
238 * and a permanent copy of the "global" data
240 addr_sp -= sizeof(bd_t);
241 bd = (bd_t *)addr_sp;
243 debug ("Reserving %d Bytes for Board Info at: %08lx\n",
244 sizeof(bd_t), addr_sp);
246 addr_sp -= sizeof(gd_t);
247 id = (gd_t *)addr_sp;
248 debug ("Reserving %d Bytes for Global Data at: %08lx\n",
249 sizeof (gd_t), addr_sp);
251 /* Reserve memory for boot params.
253 addr_sp -= CFG_BOOTPARAMS_LEN;
254 bd->bi_boot_params = addr_sp;
255 debug ("Reserving %dk for boot params() at: %08lx\n",
256 CFG_BOOTPARAMS_LEN >> 10, addr_sp);
259 * Finally, we set up a new (bigger) stack.
261 * Leave some safety gap for SP, force alignment on 16 byte boundary
262 * Clear initial stack frame
266 s = (ulong *)addr_sp;
270 debug ("Stack Pointer at: %08lx\n", addr_sp);
273 * Save local variables to board info struct
275 bd->bi_memstart = CFG_SDRAM_BASE; /* start of DRAM memory */
276 bd->bi_memsize = gd->ram_size; /* size of DRAM memory in bytes */
277 bd->bi_baudrate = gd->baudrate; /* Console Baudrate */
279 memcpy (id, (void *)gd, sizeof (gd_t));
281 /* On the purple board we copy the code in a special way
282 * in order to solve flash problems
288 relocate_code (addr_sp, id, addr);
290 /* NOTREACHED - relocate_code() does not return */
292 /************************************************************************
294 * This is the next part if the initialization sequence: we are now
295 * running from RAM and have a "normal" C environment, i. e. global
296 * data can be written, BSS has been cleared, the stack size in not
297 * that critical any more, etc.
299 ************************************************************************
302 void board_init_r (gd_t *id, ulong dest_addr)
308 extern void malloc_bin_reloc (void);
309 #ifndef CFG_ENV_IS_NOWHERE
310 extern char * env_name_spec;
317 gd->flags |= GD_FLG_RELOC; /* tell others: relocation done */
319 debug ("Now running in RAM - U-Boot at: %08lx\n", dest_addr);
321 gd->reloc_off = dest_addr - CFG_MONITOR_BASE;
323 monitor_flash_len = (ulong)&uboot_end_data - dest_addr;
326 * We have to relocate the command table manually
328 for (cmdtp = &__u_boot_cmd_start; cmdtp != &__u_boot_cmd_end; cmdtp++) {
331 addr = (ulong) (cmdtp->cmd) + gd->reloc_off;
333 printf ("Command \"%s\": 0x%08lx => 0x%08lx\n",
334 cmdtp->name, (ulong) (cmdtp->cmd), addr);
337 (int (*)(struct cmd_tbl_s *, int, int, char *[]))addr;
339 addr = (ulong)(cmdtp->name) + gd->reloc_off;
340 cmdtp->name = (char *)addr;
343 addr = (ulong)(cmdtp->usage) + gd->reloc_off;
344 cmdtp->usage = (char *)addr;
348 addr = (ulong)(cmdtp->help) + gd->reloc_off;
349 cmdtp->help = (char *)addr;
353 /* there are some other pointer constants we must deal with */
354 #ifndef CFG_ENV_IS_NOWHERE
355 env_name_spec += gd->reloc_off;
361 /* configure available FLASH banks */
363 display_flash_config (size);
364 bd->bi_flashsize = size;
367 bd->bi_flashstart = CFG_FLASH_BASE;
368 #if CFG_MONITOR_BASE == CFG_FLASH_BASE
369 bd->bi_flashoffset = monitor_flash_len; /* reserved area for U-Boot */
371 bd->bi_flashoffset = 0;
374 /* initialize malloc() area */
378 /* relocate environment function pointers etc. */
381 /* board MAC address */
382 s = getenv ("ethaddr");
383 for (i = 0; i < 6; ++i) {
384 bd->bi_enetaddr[i] = s ? simple_strtoul (s, &e, 16) : 0;
386 s = (*e) ? e + 1 : e;
390 bd->bi_ip_addr = getenv_IPaddr("ipaddr");
392 #if defined(CONFIG_PCI)
394 * Do pci configuration
399 /** leave this here (after malloc(), environment and PCI are working) **/
400 /* Initialize devices */
405 /* Initialize the console (after the relocation and devices init) */
407 /** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** **/
409 /* Initialize from environment */
410 if ((s = getenv ("loadaddr")) != NULL) {
411 load_addr = simple_strtoul (s, NULL, 16);
413 #if defined(CONFIG_CMD_NET)
414 if ((s = getenv ("bootfile")) != NULL) {
415 copy_filename (BootFile, s, sizeof (BootFile));
419 #if defined(CONFIG_MISC_INIT_R)
420 /* miscellaneous platform dependent initialisations */
424 #if defined(CONFIG_CMD_NET)
425 #if defined(CONFIG_NET_MULTI)
428 eth_initialize(gd->bd);
431 /* main_loop() can return to retry autoboot, if so just run it again. */
436 /* NOTREACHED - no way out of command loop except booting */
441 puts ("### ERROR ### Please RESET the board ###\n");