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>
34 DECLARE_GLOBAL_DATA_PTR
;
36 #if ( ((CONFIG_ENV_ADDR+CONFIG_ENV_SIZE) < CONFIG_SYS_MONITOR_BASE) || \
37 (CONFIG_ENV_ADDR >= (CONFIG_SYS_MONITOR_BASE + CONFIG_SYS_MONITOR_LEN)) ) || \
38 defined(CONFIG_ENV_IS_IN_NVRAM)
39 #define TOTAL_MALLOC_LEN (CONFIG_SYS_MALLOC_LEN + CONFIG_ENV_SIZE)
41 #define TOTAL_MALLOC_LEN CONFIG_SYS_MALLOC_LEN
46 extern int timer_init(void);
48 extern int incaip_set_cpuclk(void);
50 extern ulong uboot_end_data
;
51 extern ulong uboot_end
;
53 ulong monitor_flash_len
;
55 const char version_string
[] =
56 U_BOOT_VERSION
" (" __DATE__
" - " __TIME__
")";
58 static char *failed
= "*** failed ***\n";
61 * Begin and End of memory area for malloc(), and current "brk"
63 static ulong mem_malloc_start
;
64 static ulong mem_malloc_end
;
65 static ulong mem_malloc_brk
;
68 * mips_io_port_base is the begin of the address space to which x86 style
69 * I/O ports are mapped.
71 unsigned long mips_io_port_base
= -1;
74 * The Malloc area is immediately below the monitor copy in DRAM
76 static void mem_malloc_init (void)
78 ulong dest_addr
= CONFIG_SYS_MONITOR_BASE
+ gd
->reloc_off
;
80 mem_malloc_end
= dest_addr
;
81 mem_malloc_start
= dest_addr
- TOTAL_MALLOC_LEN
;
82 mem_malloc_brk
= mem_malloc_start
;
84 memset ((void *) mem_malloc_start
,
86 mem_malloc_end
- mem_malloc_start
);
89 void *sbrk (ptrdiff_t increment
)
91 ulong old
= mem_malloc_brk
;
92 ulong
new = old
+ increment
;
94 if ((new < mem_malloc_start
) || (new > mem_malloc_end
)) {
98 return ((void *) old
);
102 static int init_func_ram (void)
104 #ifdef CONFIG_BOARD_TYPES
105 int board_type
= gd
->board_type
;
107 int board_type
= 0; /* use dummy arg */
111 if ((gd
->ram_size
= initdram (board_type
)) > 0) {
112 print_size (gd
->ram_size
, "\n");
119 static int display_banner(void)
122 printf ("\n\n%s\n\n", version_string
);
126 #ifndef CONFIG_SYS_NO_FLASH
127 static void display_flash_config(ulong size
)
130 print_size (size
, "\n");
134 static int init_baudrate (void)
136 char tmp
[64]; /* long enough for environment variables */
137 int i
= getenv_r ("baudrate", tmp
, sizeof (tmp
));
139 gd
->baudrate
= (i
> 0)
140 ? (int) simple_strtoul (tmp
, NULL
, 10)
148 * Breath some life into the board...
150 * The first part of initialization is running from Flash memory;
151 * its main purpose is to initialize the RAM so that we
152 * can relocate the monitor code to RAM.
156 * All attempts to come up with a "common" initialization sequence
157 * that works for all boards and architectures failed: some of the
158 * requirements are just _too_ different. To get rid of the resulting
159 * mess of board dependend #ifdef'ed code we now make the whole
160 * initialization sequence configurable to the user.
162 * The requirements for any new initalization function is simple: it
163 * receives a pointer to the "global data" structure as it's only
164 * argument, and returns an integer return code, where 0 means
165 * "continue" and != 0 means "fatal error, hang the system".
167 typedef int (init_fnc_t
) (void);
169 init_fnc_t
*init_sequence
[] = {
171 env_init
, /* initialize environment */
172 #ifdef CONFIG_INCA_IP
173 incaip_set_cpuclk
, /* set cpu clock according to environment variable */
175 init_baudrate
, /* initialze baudrate settings */
176 serial_init
, /* serial communications setup */
178 display_banner
, /* say that we are here */
185 void board_init_f(ulong bootflag
)
189 init_fnc_t
**init_fnc_ptr
;
190 ulong addr
, addr_sp
, len
= (ulong
)&uboot_end
- CONFIG_SYS_MONITOR_BASE
;
193 void copy_code (ulong
);
196 /* Pointer is writable since we allocated a register for it.
199 /* compiler optimization barrier needed for GCC >= 3.4 */
200 __asm__
__volatile__("": : :"memory");
202 memset ((void *)gd
, 0, sizeof (gd_t
));
204 for (init_fnc_ptr
= init_sequence
; *init_fnc_ptr
; ++init_fnc_ptr
) {
205 if ((*init_fnc_ptr
)() != 0) {
211 * Now that we have DRAM mapped and working, we can
212 * relocate the code and continue running from DRAM.
214 addr
= CONFIG_SYS_SDRAM_BASE
+ gd
->ram_size
;
216 /* We can reserve some RAM "on top" here.
219 /* round down to next 4 kB limit.
222 debug ("Top of RAM usable for U-Boot at: %08lx\n", addr
);
224 /* Reserve memory for U-Boot code, data & bss
225 * round down to next 16 kB limit
228 addr
&= ~(16 * 1024 - 1);
230 debug ("Reserving %ldk for U-Boot at: %08lx\n", len
>> 10, addr
);
232 /* Reserve memory for malloc() arena.
234 addr_sp
= addr
- TOTAL_MALLOC_LEN
;
235 debug ("Reserving %dk for malloc() at: %08lx\n",
236 TOTAL_MALLOC_LEN
>> 10, addr_sp
);
239 * (permanently) allocate a Board Info struct
240 * and a permanent copy of the "global" data
242 addr_sp
-= sizeof(bd_t
);
243 bd
= (bd_t
*)addr_sp
;
245 debug ("Reserving %zu Bytes for Board Info at: %08lx\n",
246 sizeof(bd_t
), addr_sp
);
248 addr_sp
-= sizeof(gd_t
);
249 id
= (gd_t
*)addr_sp
;
250 debug ("Reserving %zu Bytes for Global Data at: %08lx\n",
251 sizeof (gd_t
), addr_sp
);
253 /* Reserve memory for boot params.
255 addr_sp
-= CONFIG_SYS_BOOTPARAMS_LEN
;
256 bd
->bi_boot_params
= addr_sp
;
257 debug ("Reserving %dk for boot params() at: %08lx\n",
258 CONFIG_SYS_BOOTPARAMS_LEN
>> 10, addr_sp
);
261 * Finally, we set up a new (bigger) stack.
263 * Leave some safety gap for SP, force alignment on 16 byte boundary
264 * Clear initial stack frame
268 s
= (ulong
*)addr_sp
;
272 debug ("Stack Pointer at: %08lx\n", addr_sp
);
275 * Save local variables to board info struct
277 bd
->bi_memstart
= CONFIG_SYS_SDRAM_BASE
; /* start of DRAM memory */
278 bd
->bi_memsize
= gd
->ram_size
; /* size of DRAM memory in bytes */
279 bd
->bi_baudrate
= gd
->baudrate
; /* Console Baudrate */
281 memcpy (id
, (void *)gd
, sizeof (gd_t
));
283 /* On the purple board we copy the code in a special way
284 * in order to solve flash problems
290 relocate_code (addr_sp
, id
, addr
);
292 /* NOTREACHED - relocate_code() does not return */
294 /************************************************************************
296 * This is the next part if the initialization sequence: we are now
297 * running from RAM and have a "normal" C environment, i. e. global
298 * data can be written, BSS has been cleared, the stack size in not
299 * that critical any more, etc.
301 ************************************************************************
304 void board_init_r (gd_t
*id
, ulong dest_addr
)
307 #ifndef CONFIG_SYS_NO_FLASH
310 extern void malloc_bin_reloc (void);
311 #ifndef CONFIG_ENV_IS_NOWHERE
312 extern char * env_name_spec
;
319 gd
->flags
|= GD_FLG_RELOC
; /* tell others: relocation done */
321 debug ("Now running in RAM - U-Boot at: %08lx\n", dest_addr
);
323 gd
->reloc_off
= dest_addr
- CONFIG_SYS_MONITOR_BASE
;
325 monitor_flash_len
= (ulong
)&uboot_end_data
- dest_addr
;
328 * We have to relocate the command table manually
330 for (cmdtp
= &__u_boot_cmd_start
; cmdtp
!= &__u_boot_cmd_end
; cmdtp
++) {
333 addr
= (ulong
) (cmdtp
->cmd
) + gd
->reloc_off
;
335 printf ("Command \"%s\": 0x%08lx => 0x%08lx\n",
336 cmdtp
->name
, (ulong
) (cmdtp
->cmd
), addr
);
339 (int (*)(struct cmd_tbl_s
*, int, int, char *[]))addr
;
341 addr
= (ulong
)(cmdtp
->name
) + gd
->reloc_off
;
342 cmdtp
->name
= (char *)addr
;
345 addr
= (ulong
)(cmdtp
->usage
) + gd
->reloc_off
;
346 cmdtp
->usage
= (char *)addr
;
348 #ifdef CONFIG_SYS_LONGHELP
350 addr
= (ulong
)(cmdtp
->help
) + gd
->reloc_off
;
351 cmdtp
->help
= (char *)addr
;
355 /* there are some other pointer constants we must deal with */
356 #ifndef CONFIG_ENV_IS_NOWHERE
357 env_name_spec
+= gd
->reloc_off
;
362 #ifndef CONFIG_SYS_NO_FLASH
363 /* configure available FLASH banks */
365 display_flash_config (size
);
366 bd
->bi_flashsize
= size
;
369 bd
->bi_flashstart
= CONFIG_SYS_FLASH_BASE
;
370 #if CONFIG_SYS_MONITOR_BASE == CONFIG_SYS_FLASH_BASE
371 bd
->bi_flashoffset
= monitor_flash_len
; /* reserved area for U-Boot */
373 bd
->bi_flashoffset
= 0;
376 /* initialize malloc() area */
380 /* relocate environment function pointers etc. */
383 /* board MAC address */
384 s
= getenv ("ethaddr");
385 for (i
= 0; i
< 6; ++i
) {
386 bd
->bi_enetaddr
[i
] = s
? simple_strtoul (s
, &e
, 16) : 0;
388 s
= (*e
) ? e
+ 1 : e
;
392 bd
->bi_ip_addr
= getenv_IPaddr("ipaddr");
394 #if defined(CONFIG_PCI)
396 * Do pci configuration
401 /** leave this here (after malloc(), environment and PCI are working) **/
402 /* Initialize devices */
407 /* Initialize the console (after the relocation and devices init) */
409 /** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** **/
411 /* Initialize from environment */
412 if ((s
= getenv ("loadaddr")) != NULL
) {
413 load_addr
= simple_strtoul (s
, NULL
, 16);
415 #if defined(CONFIG_CMD_NET)
416 if ((s
= getenv ("bootfile")) != NULL
) {
417 copy_filename (BootFile
, s
, sizeof (BootFile
));
421 #ifdef CONFIG_CMD_NAND
423 nand_init (); /* go init the NAND */
426 #ifdef CONFIG_CMD_SPI
428 spi_init (); /* go init the SPI */
432 #if defined(CONFIG_MISC_INIT_R)
433 /* miscellaneous platform dependent initialisations */
437 #if defined(CONFIG_CMD_NET)
438 #if defined(CONFIG_NET_MULTI)
441 eth_initialize(gd
->bd
);
444 /* main_loop() can return to retry autoboot, if so just run it again. */
449 /* NOTREACHED - no way out of command loop except booting */
454 puts ("### ERROR ### Please RESET the board ###\n");