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,
28 #include <timestamp.h>
31 #include <environment.h>
33 #include <onenand_uboot.h>
36 DECLARE_GLOBAL_DATA_PTR;
38 #if ( ((CONFIG_ENV_ADDR+CONFIG_ENV_SIZE) < CONFIG_SYS_MONITOR_BASE) || \
39 (CONFIG_ENV_ADDR >= (CONFIG_SYS_MONITOR_BASE + CONFIG_SYS_MONITOR_LEN)) ) || \
40 defined(CONFIG_ENV_IS_IN_NVRAM)
41 #define TOTAL_MALLOC_LEN (CONFIG_SYS_MALLOC_LEN + CONFIG_ENV_SIZE)
43 #define TOTAL_MALLOC_LEN CONFIG_SYS_MALLOC_LEN
48 extern int timer_init(void);
50 extern int incaip_set_cpuclk(void);
52 extern ulong uboot_end_data;
53 extern ulong uboot_end;
55 ulong monitor_flash_len;
57 const char version_string[] =
58 U_BOOT_VERSION" (" U_BOOT_DATE " - " U_BOOT_TIME ")";
60 static char *failed = "*** failed ***\n";
63 * Begin and End of memory area for malloc(), and current "brk"
65 static ulong mem_malloc_start;
66 static ulong mem_malloc_end;
67 static ulong mem_malloc_brk;
70 * mips_io_port_base is the begin of the address space to which x86 style
71 * I/O ports are mapped.
73 unsigned long mips_io_port_base = -1;
75 int __board_early_init_f(void)
78 * Nothing to do in this dummy implementation
82 int board_early_init_f(void) __attribute__((weak, alias("__board_early_init_f")));
85 * The Malloc area is immediately below the monitor copy in DRAM
87 static void mem_malloc_init (void)
89 ulong dest_addr = CONFIG_SYS_MONITOR_BASE + gd->reloc_off;
91 mem_malloc_end = dest_addr;
92 mem_malloc_start = dest_addr - TOTAL_MALLOC_LEN;
93 mem_malloc_brk = mem_malloc_start;
95 memset ((void *) mem_malloc_start,
97 mem_malloc_end - mem_malloc_start);
100 void *sbrk (ptrdiff_t increment)
102 ulong old = mem_malloc_brk;
103 ulong new = old + increment;
105 if ((new < mem_malloc_start) || (new > mem_malloc_end)) {
108 mem_malloc_brk = new;
109 return ((void *) old);
113 static int init_func_ram (void)
115 #ifdef CONFIG_BOARD_TYPES
116 int board_type = gd->board_type;
118 int board_type = 0; /* use dummy arg */
122 if ((gd->ram_size = initdram (board_type)) > 0) {
123 print_size (gd->ram_size, "\n");
130 static int display_banner(void)
133 printf ("\n\n%s\n\n", version_string);
137 #ifndef CONFIG_SYS_NO_FLASH
138 static void display_flash_config(ulong size)
141 print_size (size, "\n");
145 static int init_baudrate (void)
147 char tmp[64]; /* long enough for environment variables */
148 int i = getenv_r ("baudrate", tmp, sizeof (tmp));
150 gd->baudrate = (i > 0)
151 ? (int) simple_strtoul (tmp, NULL, 10)
159 * Breath some life into the board...
161 * The first part of initialization is running from Flash memory;
162 * its main purpose is to initialize the RAM so that we
163 * can relocate the monitor code to RAM.
167 * All attempts to come up with a "common" initialization sequence
168 * that works for all boards and architectures failed: some of the
169 * requirements are just _too_ different. To get rid of the resulting
170 * mess of board dependend #ifdef'ed code we now make the whole
171 * initialization sequence configurable to the user.
173 * The requirements for any new initalization function is simple: it
174 * receives a pointer to the "global data" structure as it's only
175 * argument, and returns an integer return code, where 0 means
176 * "continue" and != 0 means "fatal error, hang the system".
178 typedef int (init_fnc_t) (void);
180 init_fnc_t *init_sequence[] = {
183 env_init, /* initialize environment */
184 #ifdef CONFIG_INCA_IP
185 incaip_set_cpuclk, /* set cpu clock according to environment variable */
187 init_baudrate, /* initialze baudrate settings */
188 serial_init, /* serial communications setup */
190 display_banner, /* say that we are here */
197 void board_init_f(ulong bootflag)
201 init_fnc_t **init_fnc_ptr;
202 ulong addr, addr_sp, len = (ulong)&uboot_end - CONFIG_SYS_MONITOR_BASE;
205 void copy_code (ulong);
208 /* Pointer is writable since we allocated a register for it.
211 /* compiler optimization barrier needed for GCC >= 3.4 */
212 __asm__ __volatile__("": : :"memory");
214 memset ((void *)gd, 0, sizeof (gd_t));
216 for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
217 if ((*init_fnc_ptr)() != 0) {
223 * Now that we have DRAM mapped and working, we can
224 * relocate the code and continue running from DRAM.
226 addr = CONFIG_SYS_SDRAM_BASE + gd->ram_size;
228 /* We can reserve some RAM "on top" here.
231 /* round down to next 4 kB limit.
234 debug ("Top of RAM usable for U-Boot at: %08lx\n", addr);
236 /* Reserve memory for U-Boot code, data & bss
237 * round down to next 16 kB limit
240 addr &= ~(16 * 1024 - 1);
242 debug ("Reserving %ldk for U-Boot at: %08lx\n", len >> 10, addr);
244 /* Reserve memory for malloc() arena.
246 addr_sp = addr - TOTAL_MALLOC_LEN;
247 debug ("Reserving %dk for malloc() at: %08lx\n",
248 TOTAL_MALLOC_LEN >> 10, addr_sp);
251 * (permanently) allocate a Board Info struct
252 * and a permanent copy of the "global" data
254 addr_sp -= sizeof(bd_t);
255 bd = (bd_t *)addr_sp;
257 debug ("Reserving %zu Bytes for Board Info at: %08lx\n",
258 sizeof(bd_t), addr_sp);
260 addr_sp -= sizeof(gd_t);
261 id = (gd_t *)addr_sp;
262 debug ("Reserving %zu Bytes for Global Data at: %08lx\n",
263 sizeof (gd_t), addr_sp);
265 /* Reserve memory for boot params.
267 addr_sp -= CONFIG_SYS_BOOTPARAMS_LEN;
268 bd->bi_boot_params = addr_sp;
269 debug ("Reserving %dk for boot params() at: %08lx\n",
270 CONFIG_SYS_BOOTPARAMS_LEN >> 10, addr_sp);
273 * Finally, we set up a new (bigger) stack.
275 * Leave some safety gap for SP, force alignment on 16 byte boundary
276 * Clear initial stack frame
280 s = (ulong *)addr_sp;
284 debug ("Stack Pointer at: %08lx\n", addr_sp);
287 * Save local variables to board info struct
289 bd->bi_memstart = CONFIG_SYS_SDRAM_BASE; /* start of DRAM memory */
290 bd->bi_memsize = gd->ram_size; /* size of DRAM memory in bytes */
291 bd->bi_baudrate = gd->baudrate; /* Console Baudrate */
293 memcpy (id, (void *)gd, sizeof (gd_t));
295 /* On the purple board we copy the code in a special way
296 * in order to solve flash problems
302 relocate_code (addr_sp, id, addr);
304 /* NOTREACHED - relocate_code() does not return */
306 /************************************************************************
308 * This is the next part if the initialization sequence: we are now
309 * running from RAM and have a "normal" C environment, i. e. global
310 * data can be written, BSS has been cleared, the stack size in not
311 * that critical any more, etc.
313 ************************************************************************
316 void board_init_r (gd_t *id, ulong dest_addr)
319 #ifndef CONFIG_SYS_NO_FLASH
322 extern void malloc_bin_reloc (void);
323 #ifndef CONFIG_ENV_IS_NOWHERE
324 extern char * env_name_spec;
331 gd->flags |= GD_FLG_RELOC; /* tell others: relocation done */
333 debug ("Now running in RAM - U-Boot at: %08lx\n", dest_addr);
335 gd->reloc_off = dest_addr - CONFIG_SYS_MONITOR_BASE;
337 monitor_flash_len = (ulong)&uboot_end_data - dest_addr;
340 * We have to relocate the command table manually
342 for (cmdtp = &__u_boot_cmd_start; cmdtp != &__u_boot_cmd_end; cmdtp++) {
345 addr = (ulong) (cmdtp->cmd) + gd->reloc_off;
347 printf ("Command \"%s\": 0x%08lx => 0x%08lx\n",
348 cmdtp->name, (ulong) (cmdtp->cmd), addr);
351 (int (*)(struct cmd_tbl_s *, int, int, char *[]))addr;
353 addr = (ulong)(cmdtp->name) + gd->reloc_off;
354 cmdtp->name = (char *)addr;
357 addr = (ulong)(cmdtp->usage) + gd->reloc_off;
358 cmdtp->usage = (char *)addr;
360 #ifdef CONFIG_SYS_LONGHELP
362 addr = (ulong)(cmdtp->help) + gd->reloc_off;
363 cmdtp->help = (char *)addr;
367 /* there are some other pointer constants we must deal with */
368 #ifndef CONFIG_ENV_IS_NOWHERE
369 env_name_spec += gd->reloc_off;
374 #ifndef CONFIG_SYS_NO_FLASH
375 /* configure available FLASH banks */
377 display_flash_config (size);
378 bd->bi_flashsize = size;
381 bd->bi_flashstart = CONFIG_SYS_FLASH_BASE;
382 #if CONFIG_SYS_MONITOR_BASE == CONFIG_SYS_FLASH_BASE
383 bd->bi_flashoffset = monitor_flash_len; /* reserved area for U-Boot */
385 bd->bi_flashoffset = 0;
388 /* initialize malloc() area */
392 #ifdef CONFIG_CMD_NAND
394 nand_init (); /* go init the NAND */
397 #if defined(CONFIG_CMD_ONENAND)
401 /* relocate environment function pointers etc. */
405 bd->bi_ip_addr = getenv_IPaddr("ipaddr");
407 #if defined(CONFIG_PCI)
409 * Do pci configuration
414 /** leave this here (after malloc(), environment and PCI are working) **/
415 /* Initialize devices */
420 /* Initialize the console (after the relocation and devices init) */
422 /** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** **/
424 /* Initialize from environment */
425 if ((s = getenv ("loadaddr")) != NULL) {
426 load_addr = simple_strtoul (s, NULL, 16);
428 #if defined(CONFIG_CMD_NET)
429 if ((s = getenv ("bootfile")) != NULL) {
430 copy_filename (BootFile, s, sizeof (BootFile));
434 #ifdef CONFIG_CMD_SPI
436 spi_init (); /* go init the SPI */
440 #if defined(CONFIG_MISC_INIT_R)
441 /* miscellaneous platform dependent initialisations */
445 #if defined(CONFIG_CMD_NET)
446 #if defined(CONFIG_NET_MULTI)
449 eth_initialize(gd->bd);
452 /* main_loop() can return to retry autoboot, if so just run it again. */
457 /* NOTREACHED - no way out of command loop except booting */
462 puts ("### ERROR ### Please RESET the board ###\n");