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,
28 #include <timestamp.h>
31 #include <environment.h>
35 DECLARE_GLOBAL_DATA_PTR;
37 #if ( ((CONFIG_ENV_ADDR+CONFIG_ENV_SIZE) < CONFIG_SYS_MONITOR_BASE) || \
38 (CONFIG_ENV_ADDR >= (CONFIG_SYS_MONITOR_BASE + CONFIG_SYS_MONITOR_LEN)) ) || \
39 defined(CONFIG_ENV_IS_IN_NVRAM)
40 #define TOTAL_MALLOC_LEN (CONFIG_SYS_MALLOC_LEN + CONFIG_ENV_SIZE)
42 #define TOTAL_MALLOC_LEN CONFIG_SYS_MALLOC_LEN
47 extern int timer_init(void);
49 extern int incaip_set_cpuclk(void);
51 extern ulong uboot_end_data;
52 extern ulong uboot_end;
54 ulong monitor_flash_len;
56 const char version_string[] =
57 U_BOOT_VERSION" (" U_BOOT_DATE " - " U_BOOT_TIME ")";
59 static char *failed = "*** failed ***\n";
62 * Begin and End of memory area for malloc(), and current "brk"
64 static ulong mem_malloc_start;
65 static ulong mem_malloc_end;
66 static ulong mem_malloc_brk;
69 * mips_io_port_base is the begin of the address space to which x86 style
70 * I/O ports are mapped.
72 unsigned long mips_io_port_base = -1;
75 * The Malloc area is immediately below the monitor copy in DRAM
77 static void mem_malloc_init (void)
79 ulong dest_addr = CONFIG_SYS_MONITOR_BASE + gd->reloc_off;
81 mem_malloc_end = dest_addr;
82 mem_malloc_start = dest_addr - TOTAL_MALLOC_LEN;
83 mem_malloc_brk = mem_malloc_start;
85 memset ((void *) mem_malloc_start,
87 mem_malloc_end - mem_malloc_start);
90 void *sbrk (ptrdiff_t increment)
92 ulong old = mem_malloc_brk;
93 ulong new = old + increment;
95 if ((new < mem_malloc_start) || (new > mem_malloc_end)) {
99 return ((void *) old);
103 static int init_func_ram (void)
105 #ifdef CONFIG_BOARD_TYPES
106 int board_type = gd->board_type;
108 int board_type = 0; /* use dummy arg */
112 if ((gd->ram_size = initdram (board_type)) > 0) {
113 print_size (gd->ram_size, "\n");
120 static int display_banner(void)
123 printf ("\n\n%s\n\n", version_string);
127 #ifndef CONFIG_SYS_NO_FLASH
128 static void display_flash_config(ulong size)
131 print_size (size, "\n");
135 static int init_baudrate (void)
137 char tmp[64]; /* long enough for environment variables */
138 int i = getenv_r ("baudrate", tmp, sizeof (tmp));
140 gd->baudrate = (i > 0)
141 ? (int) simple_strtoul (tmp, NULL, 10)
149 * Breath some life into the board...
151 * The first part of initialization is running from Flash memory;
152 * its main purpose is to initialize the RAM so that we
153 * can relocate the monitor code to RAM.
157 * All attempts to come up with a "common" initialization sequence
158 * that works for all boards and architectures failed: some of the
159 * requirements are just _too_ different. To get rid of the resulting
160 * mess of board dependend #ifdef'ed code we now make the whole
161 * initialization sequence configurable to the user.
163 * The requirements for any new initalization function is simple: it
164 * receives a pointer to the "global data" structure as it's only
165 * argument, and returns an integer return code, where 0 means
166 * "continue" and != 0 means "fatal error, hang the system".
168 typedef int (init_fnc_t) (void);
170 init_fnc_t *init_sequence[] = {
172 env_init, /* initialize environment */
173 #ifdef CONFIG_INCA_IP
174 incaip_set_cpuclk, /* set cpu clock according to environment variable */
176 init_baudrate, /* initialze baudrate settings */
177 serial_init, /* serial communications setup */
179 display_banner, /* say that we are here */
186 void board_init_f(ulong bootflag)
190 init_fnc_t **init_fnc_ptr;
191 ulong addr, addr_sp, len = (ulong)&uboot_end - CONFIG_SYS_MONITOR_BASE;
194 void copy_code (ulong);
197 /* Pointer is writable since we allocated a register for it.
200 /* compiler optimization barrier needed for GCC >= 3.4 */
201 __asm__ __volatile__("": : :"memory");
203 memset ((void *)gd, 0, sizeof (gd_t));
205 for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
206 if ((*init_fnc_ptr)() != 0) {
212 * Now that we have DRAM mapped and working, we can
213 * relocate the code and continue running from DRAM.
215 addr = CONFIG_SYS_SDRAM_BASE + gd->ram_size;
217 /* We can reserve some RAM "on top" here.
220 /* round down to next 4 kB limit.
223 debug ("Top of RAM usable for U-Boot at: %08lx\n", addr);
225 /* Reserve memory for U-Boot code, data & bss
226 * round down to next 16 kB limit
229 addr &= ~(16 * 1024 - 1);
231 debug ("Reserving %ldk for U-Boot at: %08lx\n", len >> 10, addr);
233 /* Reserve memory for malloc() arena.
235 addr_sp = addr - TOTAL_MALLOC_LEN;
236 debug ("Reserving %dk for malloc() at: %08lx\n",
237 TOTAL_MALLOC_LEN >> 10, addr_sp);
240 * (permanently) allocate a Board Info struct
241 * and a permanent copy of the "global" data
243 addr_sp -= sizeof(bd_t);
244 bd = (bd_t *)addr_sp;
246 debug ("Reserving %zu Bytes for Board Info at: %08lx\n",
247 sizeof(bd_t), addr_sp);
249 addr_sp -= sizeof(gd_t);
250 id = (gd_t *)addr_sp;
251 debug ("Reserving %zu Bytes for Global Data at: %08lx\n",
252 sizeof (gd_t), addr_sp);
254 /* Reserve memory for boot params.
256 addr_sp -= CONFIG_SYS_BOOTPARAMS_LEN;
257 bd->bi_boot_params = addr_sp;
258 debug ("Reserving %dk for boot params() at: %08lx\n",
259 CONFIG_SYS_BOOTPARAMS_LEN >> 10, addr_sp);
262 * Finally, we set up a new (bigger) stack.
264 * Leave some safety gap for SP, force alignment on 16 byte boundary
265 * Clear initial stack frame
269 s = (ulong *)addr_sp;
273 debug ("Stack Pointer at: %08lx\n", addr_sp);
276 * Save local variables to board info struct
278 bd->bi_memstart = CONFIG_SYS_SDRAM_BASE; /* start of DRAM memory */
279 bd->bi_memsize = gd->ram_size; /* size of DRAM memory in bytes */
280 bd->bi_baudrate = gd->baudrate; /* Console Baudrate */
282 memcpy (id, (void *)gd, sizeof (gd_t));
284 /* On the purple board we copy the code in a special way
285 * in order to solve flash problems
291 relocate_code (addr_sp, id, addr);
293 /* NOTREACHED - relocate_code() does not return */
295 /************************************************************************
297 * This is the next part if the initialization sequence: we are now
298 * running from RAM and have a "normal" C environment, i. e. global
299 * data can be written, BSS has been cleared, the stack size in not
300 * that critical any more, etc.
302 ************************************************************************
305 void board_init_r (gd_t *id, ulong dest_addr)
308 #ifndef CONFIG_SYS_NO_FLASH
311 extern void malloc_bin_reloc (void);
312 #ifndef CONFIG_ENV_IS_NOWHERE
313 extern char * env_name_spec;
320 gd->flags |= GD_FLG_RELOC; /* tell others: relocation done */
322 debug ("Now running in RAM - U-Boot at: %08lx\n", dest_addr);
324 gd->reloc_off = dest_addr - CONFIG_SYS_MONITOR_BASE;
326 monitor_flash_len = (ulong)&uboot_end_data - dest_addr;
329 * We have to relocate the command table manually
331 for (cmdtp = &__u_boot_cmd_start; cmdtp != &__u_boot_cmd_end; cmdtp++) {
334 addr = (ulong) (cmdtp->cmd) + gd->reloc_off;
336 printf ("Command \"%s\": 0x%08lx => 0x%08lx\n",
337 cmdtp->name, (ulong) (cmdtp->cmd), addr);
340 (int (*)(struct cmd_tbl_s *, int, int, char *[]))addr;
342 addr = (ulong)(cmdtp->name) + gd->reloc_off;
343 cmdtp->name = (char *)addr;
346 addr = (ulong)(cmdtp->usage) + gd->reloc_off;
347 cmdtp->usage = (char *)addr;
349 #ifdef CONFIG_SYS_LONGHELP
351 addr = (ulong)(cmdtp->help) + gd->reloc_off;
352 cmdtp->help = (char *)addr;
356 /* there are some other pointer constants we must deal with */
357 #ifndef CONFIG_ENV_IS_NOWHERE
358 env_name_spec += gd->reloc_off;
363 #ifndef CONFIG_SYS_NO_FLASH
364 /* configure available FLASH banks */
366 display_flash_config (size);
367 bd->bi_flashsize = size;
370 bd->bi_flashstart = CONFIG_SYS_FLASH_BASE;
371 #if CONFIG_SYS_MONITOR_BASE == CONFIG_SYS_FLASH_BASE
372 bd->bi_flashoffset = monitor_flash_len; /* reserved area for U-Boot */
374 bd->bi_flashoffset = 0;
377 /* initialize malloc() area */
381 /* relocate environment function pointers etc. */
384 /* board MAC address */
385 s = getenv ("ethaddr");
386 for (i = 0; i < 6; ++i) {
387 bd->bi_enetaddr[i] = s ? simple_strtoul (s, &e, 16) : 0;
389 s = (*e) ? e + 1 : e;
393 bd->bi_ip_addr = getenv_IPaddr("ipaddr");
395 #if defined(CONFIG_PCI)
397 * Do pci configuration
402 /** leave this here (after malloc(), environment and PCI are working) **/
403 /* Initialize devices */
408 /* Initialize the console (after the relocation and devices init) */
410 /** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** **/
412 /* Initialize from environment */
413 if ((s = getenv ("loadaddr")) != NULL) {
414 load_addr = simple_strtoul (s, NULL, 16);
416 #if defined(CONFIG_CMD_NET)
417 if ((s = getenv ("bootfile")) != NULL) {
418 copy_filename (BootFile, s, sizeof (BootFile));
422 #ifdef CONFIG_CMD_NAND
424 nand_init (); /* go init the NAND */
427 #ifdef CONFIG_CMD_SPI
429 spi_init (); /* go init the SPI */
433 #if defined(CONFIG_MISC_INIT_R)
434 /* miscellaneous platform dependent initialisations */
438 #if defined(CONFIG_CMD_NET)
439 #if defined(CONFIG_NET_MULTI)
442 eth_initialize(gd->bd);
445 /* main_loop() can return to retry autoboot, if so just run it again. */
450 /* NOTREACHED - no way out of command loop except booting */
455 puts ("### ERROR ### Please RESET the board ###\n");