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>
33 DECLARE_GLOBAL_DATA_PTR;
35 #if ( ((CFG_ENV_ADDR+CFG_ENV_SIZE) < CFG_MONITOR_BASE) || \
36 (CFG_ENV_ADDR >= (CFG_MONITOR_BASE + CFG_MONITOR_LEN)) ) || \
37 defined(CFG_ENV_IS_IN_NVRAM)
38 #define TOTAL_MALLOC_LEN (CFG_MALLOC_LEN + CFG_ENV_SIZE)
40 #define TOTAL_MALLOC_LEN CFG_MALLOC_LEN
45 extern int timer_init(void);
47 extern int incaip_set_cpuclk(void);
49 extern ulong uboot_end_data;
50 extern ulong uboot_end;
52 ulong monitor_flash_len;
54 const char version_string[] =
55 U_BOOT_VERSION" (" __DATE__ " - " __TIME__ ")";
57 static char *failed = "*** failed ***\n";
60 * Begin and End of memory area for malloc(), and current "brk"
62 static ulong mem_malloc_start;
63 static ulong mem_malloc_end;
64 static ulong mem_malloc_brk;
67 * mips_io_port_base is the begin of the address space to which x86 style
68 * I/O ports are mapped.
70 unsigned long mips_io_port_base = -1;
73 * The Malloc area is immediately below the monitor copy in DRAM
75 static void mem_malloc_init (void)
77 ulong dest_addr = CFG_MONITOR_BASE + gd->reloc_off;
79 mem_malloc_end = dest_addr;
80 mem_malloc_start = dest_addr - TOTAL_MALLOC_LEN;
81 mem_malloc_brk = mem_malloc_start;
83 memset ((void *) mem_malloc_start,
85 mem_malloc_end - mem_malloc_start);
88 void *sbrk (ptrdiff_t increment)
90 ulong old = mem_malloc_brk;
91 ulong new = old + increment;
93 if ((new < mem_malloc_start) || (new > mem_malloc_end)) {
97 return ((void *) old);
101 static int init_func_ram (void)
103 #ifdef CONFIG_BOARD_TYPES
104 int board_type = gd->board_type;
106 int board_type = 0; /* use dummy arg */
110 if ((gd->ram_size = initdram (board_type)) > 0) {
111 print_size (gd->ram_size, "\n");
118 static int display_banner(void)
121 printf ("\n\n%s\n\n", version_string);
126 static void display_flash_config(ulong size)
129 print_size (size, "\n");
133 static int init_baudrate (void)
135 char tmp[64]; /* long enough for environment variables */
136 int i = getenv_r ("baudrate", tmp, sizeof (tmp));
138 gd->baudrate = (i > 0)
139 ? (int) simple_strtoul (tmp, NULL, 10)
147 * Breath some life into the board...
149 * The first part of initialization is running from Flash memory;
150 * its main purpose is to initialize the RAM so that we
151 * can relocate the monitor code to RAM.
155 * All attempts to come up with a "common" initialization sequence
156 * that works for all boards and architectures failed: some of the
157 * requirements are just _too_ different. To get rid of the resulting
158 * mess of board dependend #ifdef'ed code we now make the whole
159 * initialization sequence configurable to the user.
161 * The requirements for any new initalization function is simple: it
162 * receives a pointer to the "global data" structure as it's only
163 * argument, and returns an integer return code, where 0 means
164 * "continue" and != 0 means "fatal error, hang the system".
166 typedef int (init_fnc_t) (void);
168 init_fnc_t *init_sequence[] = {
170 env_init, /* initialize environment */
171 #ifdef CONFIG_INCA_IP
172 incaip_set_cpuclk, /* set cpu clock according to environment variable */
174 init_baudrate, /* initialze baudrate settings */
175 serial_init, /* serial communications setup */
177 display_banner, /* say that we are here */
184 void board_init_f(ulong bootflag)
188 init_fnc_t **init_fnc_ptr;
189 ulong addr, addr_sp, len = (ulong)&uboot_end - CFG_MONITOR_BASE;
192 void copy_code (ulong);
195 /* Pointer is writable since we allocated a register for it.
198 /* compiler optimization barrier needed for GCC >= 3.4 */
199 __asm__ __volatile__("": : :"memory");
201 memset ((void *)gd, 0, sizeof (gd_t));
203 for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
204 if ((*init_fnc_ptr)() != 0) {
210 * Now that we have DRAM mapped and working, we can
211 * relocate the code and continue running from DRAM.
213 addr = CFG_SDRAM_BASE + gd->ram_size;
215 /* We can reserve some RAM "on top" here.
218 /* round down to next 4 kB limit.
221 debug ("Top of RAM usable for U-Boot at: %08lx\n", addr);
223 /* Reserve memory for U-Boot code, data & bss
224 * round down to next 16 kB limit
227 addr &= ~(16 * 1024 - 1);
229 debug ("Reserving %ldk for U-Boot at: %08lx\n", len >> 10, addr);
231 /* Reserve memory for malloc() arena.
233 addr_sp = addr - TOTAL_MALLOC_LEN;
234 debug ("Reserving %dk for malloc() at: %08lx\n",
235 TOTAL_MALLOC_LEN >> 10, addr_sp);
238 * (permanently) allocate a Board Info struct
239 * and a permanent copy of the "global" data
241 addr_sp -= sizeof(bd_t);
242 bd = (bd_t *)addr_sp;
244 debug ("Reserving %d Bytes for Board Info at: %08lx\n",
245 sizeof(bd_t), addr_sp);
247 addr_sp -= sizeof(gd_t);
248 id = (gd_t *)addr_sp;
249 debug ("Reserving %d Bytes for Global Data at: %08lx\n",
250 sizeof (gd_t), addr_sp);
252 /* Reserve memory for boot params.
254 addr_sp -= CFG_BOOTPARAMS_LEN;
255 bd->bi_boot_params = addr_sp;
256 debug ("Reserving %dk for boot params() at: %08lx\n",
257 CFG_BOOTPARAMS_LEN >> 10, addr_sp);
260 * Finally, we set up a new (bigger) stack.
262 * Leave some safety gap for SP, force alignment on 16 byte boundary
263 * Clear initial stack frame
267 s = (ulong *)addr_sp;
271 debug ("Stack Pointer at: %08lx\n", addr_sp);
274 * Save local variables to board info struct
276 bd->bi_memstart = CFG_SDRAM_BASE; /* start of DRAM memory */
277 bd->bi_memsize = gd->ram_size; /* size of DRAM memory in bytes */
278 bd->bi_baudrate = gd->baudrate; /* Console Baudrate */
280 memcpy (id, (void *)gd, sizeof (gd_t));
282 /* On the purple board we copy the code in a special way
283 * in order to solve flash problems
289 relocate_code (addr_sp, id, addr);
291 /* NOTREACHED - relocate_code() does not return */
293 /************************************************************************
295 * This is the next part if the initialization sequence: we are now
296 * running from RAM and have a "normal" C environment, i. e. global
297 * data can be written, BSS has been cleared, the stack size in not
298 * that critical any more, etc.
300 ************************************************************************
303 void board_init_r (gd_t *id, ulong dest_addr)
309 extern void malloc_bin_reloc (void);
310 #ifndef CFG_ENV_IS_NOWHERE
311 extern char * env_name_spec;
318 gd->flags |= GD_FLG_RELOC; /* tell others: relocation done */
320 debug ("Now running in RAM - U-Boot at: %08lx\n", dest_addr);
322 gd->reloc_off = dest_addr - CFG_MONITOR_BASE;
324 monitor_flash_len = (ulong)&uboot_end_data - dest_addr;
327 * We have to relocate the command table manually
329 for (cmdtp = &__u_boot_cmd_start; cmdtp != &__u_boot_cmd_end; cmdtp++) {
332 addr = (ulong) (cmdtp->cmd) + gd->reloc_off;
334 printf ("Command \"%s\": 0x%08lx => 0x%08lx\n",
335 cmdtp->name, (ulong) (cmdtp->cmd), addr);
338 (int (*)(struct cmd_tbl_s *, int, int, char *[]))addr;
340 addr = (ulong)(cmdtp->name) + gd->reloc_off;
341 cmdtp->name = (char *)addr;
344 addr = (ulong)(cmdtp->usage) + gd->reloc_off;
345 cmdtp->usage = (char *)addr;
349 addr = (ulong)(cmdtp->help) + gd->reloc_off;
350 cmdtp->help = (char *)addr;
354 /* there are some other pointer constants we must deal with */
355 #ifndef CFG_ENV_IS_NOWHERE
356 env_name_spec += gd->reloc_off;
362 /* configure available FLASH banks */
364 display_flash_config (size);
365 bd->bi_flashsize = size;
368 bd->bi_flashstart = CFG_FLASH_BASE;
369 #if CFG_MONITOR_BASE == CFG_FLASH_BASE
370 bd->bi_flashoffset = monitor_flash_len; /* reserved area for U-Boot */
372 bd->bi_flashoffset = 0;
375 /* initialize malloc() area */
379 /* relocate environment function pointers etc. */
382 /* board MAC address */
383 s = getenv ("ethaddr");
384 for (i = 0; i < 6; ++i) {
385 bd->bi_enetaddr[i] = s ? simple_strtoul (s, &e, 16) : 0;
387 s = (*e) ? e + 1 : e;
391 bd->bi_ip_addr = getenv_IPaddr("ipaddr");
393 #if defined(CONFIG_PCI)
395 * Do pci configuration
400 /** leave this here (after malloc(), environment and PCI are working) **/
401 /* Initialize devices */
406 /* Initialize the console (after the relocation and devices init) */
408 /** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** **/
410 /* Initialize from environment */
411 if ((s = getenv ("loadaddr")) != NULL) {
412 load_addr = simple_strtoul (s, NULL, 16);
414 #if defined(CONFIG_CMD_NET)
415 if ((s = getenv ("bootfile")) != NULL) {
416 copy_filename (BootFile, s, sizeof (BootFile));
420 #ifdef CONFIG_CMD_NAND
422 nand_init (); /* go init the NAND */
425 #if defined(CONFIG_MISC_INIT_R)
426 /* miscellaneous platform dependent initialisations */
430 #if defined(CONFIG_CMD_NET)
431 #if defined(CONFIG_NET_MULTI)
434 eth_initialize(gd->bd);
437 /* main_loop() can return to retry autoboot, if so just run it again. */
442 /* NOTREACHED - no way out of command loop except booting */
447 puts ("### ERROR ### Please RESET the board ###\n");