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 <stdio_dev.h>
31 #include <environment.h>
33 #include <onenand_uboot.h>
36 #ifdef CONFIG_BITBANGMII
40 DECLARE_GLOBAL_DATA_PTR;
42 ulong monitor_flash_len;
44 static char *failed = "*** failed ***\n";
47 * mips_io_port_base is the begin of the address space to which x86 style
48 * I/O ports are mapped.
50 const unsigned long mips_io_port_base = -1;
52 int __board_early_init_f(void)
55 * Nothing to do in this dummy implementation
59 int board_early_init_f(void)
60 __attribute__((weak, alias("__board_early_init_f")));
62 static int init_func_ram(void)
64 #ifdef CONFIG_BOARD_TYPES
65 int board_type = gd->board_type;
67 int board_type = 0; /* use dummy arg */
71 gd->ram_size = initdram(board_type);
72 if (gd->ram_size > 0) {
73 print_size(gd->ram_size, "\n");
80 static int display_banner(void)
83 printf("\n\n%s\n\n", version_string);
87 #ifndef CONFIG_SYS_NO_FLASH
88 static void display_flash_config(ulong size)
91 print_size(size, "\n");
95 static int init_baudrate(void)
97 gd->baudrate = getenv_ulong("baudrate", 10, CONFIG_BAUDRATE);
103 * Breath some life into the board...
105 * The first part of initialization is running from Flash memory;
106 * its main purpose is to initialize the RAM so that we
107 * can relocate the monitor code to RAM.
111 * All attempts to come up with a "common" initialization sequence
112 * that works for all boards and architectures failed: some of the
113 * requirements are just _too_ different. To get rid of the resulting
114 * mess of board dependend #ifdef'ed code we now make the whole
115 * initialization sequence configurable to the user.
117 * The requirements for any new initalization function is simple: it
118 * receives a pointer to the "global data" structure as it's only
119 * argument, and returns an integer return code, where 0 means
120 * "continue" and != 0 means "fatal error, hang the system".
122 typedef int (init_fnc_t)(void);
124 init_fnc_t *init_sequence[] = {
127 env_init, /* initialize environment */
128 #ifdef CONFIG_INCA_IP
129 incaip_set_cpuclk, /* set cpu clock according to env. variable */
131 init_baudrate, /* initialize baudrate settings */
132 serial_init, /* serial communications setup */
134 display_banner, /* say that we are here */
141 void board_init_f(ulong bootflag)
145 init_fnc_t **init_fnc_ptr;
146 ulong addr, addr_sp, len;
149 /* Pointer is writable since we allocated a register for it.
152 /* compiler optimization barrier needed for GCC >= 3.4 */
153 __asm__ __volatile__("" : : : "memory");
155 memset((void *)gd, 0, sizeof(gd_t));
157 for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
158 if ((*init_fnc_ptr)() != 0)
163 * Now that we have DRAM mapped and working, we can
164 * relocate the code and continue running from DRAM.
166 addr = CONFIG_SYS_SDRAM_BASE + gd->ram_size;
168 /* We can reserve some RAM "on top" here.
171 /* round down to next 4 kB limit.
174 debug("Top of RAM usable for U-Boot at: %08lx\n", addr);
176 /* Reserve memory for U-Boot code, data & bss
177 * round down to next 16 kB limit
179 len = bss_end() - CONFIG_SYS_MONITOR_BASE;
181 addr &= ~(16 * 1024 - 1);
183 debug("Reserving %ldk for U-Boot at: %08lx\n", len >> 10, addr);
185 /* Reserve memory for malloc() arena.
187 addr_sp = addr - TOTAL_MALLOC_LEN;
188 debug("Reserving %dk for malloc() at: %08lx\n",
189 TOTAL_MALLOC_LEN >> 10, addr_sp);
192 * (permanently) allocate a Board Info struct
193 * and a permanent copy of the "global" data
195 addr_sp -= sizeof(bd_t);
196 bd = (bd_t *)addr_sp;
198 debug("Reserving %zu Bytes for Board Info at: %08lx\n",
199 sizeof(bd_t), addr_sp);
201 addr_sp -= sizeof(gd_t);
202 id = (gd_t *)addr_sp;
203 debug("Reserving %zu Bytes for Global Data at: %08lx\n",
204 sizeof(gd_t), addr_sp);
206 /* Reserve memory for boot params.
208 addr_sp -= CONFIG_SYS_BOOTPARAMS_LEN;
209 bd->bi_boot_params = addr_sp;
210 debug("Reserving %dk for boot params() at: %08lx\n",
211 CONFIG_SYS_BOOTPARAMS_LEN >> 10, addr_sp);
214 * Finally, we set up a new (bigger) stack.
216 * Leave some safety gap for SP, force alignment on 16 byte boundary
217 * Clear initial stack frame
221 s = (ulong *)addr_sp;
225 debug("Stack Pointer at: %08lx\n", addr_sp);
228 * Save local variables to board info struct
230 bd->bi_memstart = CONFIG_SYS_SDRAM_BASE; /* start of DRAM */
231 bd->bi_memsize = gd->ram_size; /* size of DRAM in bytes */
232 bd->bi_baudrate = gd->baudrate; /* Console Baudrate */
234 memcpy(id, (void *)gd, sizeof(gd_t));
236 relocate_code(addr_sp, id, addr);
238 /* NOTREACHED - relocate_code() does not return */
242 * This is the next part if the initialization sequence: we are now
243 * running from RAM and have a "normal" C environment, i. e. global
244 * data can be written, BSS has been cleared, the stack size in not
245 * that critical any more, etc.
248 void board_init_r(gd_t *id, ulong dest_addr)
250 #ifndef CONFIG_SYS_NO_FLASH
256 gd->flags |= GD_FLG_RELOC; /* tell others: relocation done */
258 debug("Now running in RAM - U-Boot at: %08lx\n", dest_addr);
260 gd->reloc_off = dest_addr - CONFIG_SYS_MONITOR_BASE;
262 monitor_flash_len = image_copy_end() - dest_addr;
268 /* The Malloc area is immediately below the monitor copy in DRAM */
269 mem_malloc_init(CONFIG_SYS_MONITOR_BASE + gd->reloc_off -
270 TOTAL_MALLOC_LEN, TOTAL_MALLOC_LEN);
272 #ifndef CONFIG_SYS_NO_FLASH
273 /* configure available FLASH banks */
275 display_flash_config(size);
276 bd->bi_flashstart = CONFIG_SYS_FLASH_BASE;
277 bd->bi_flashsize = size;
279 #if CONFIG_SYS_MONITOR_BASE == CONFIG_SYS_FLASH_BASE
280 bd->bi_flashoffset = monitor_flash_len; /* reserved area for U-Boot */
282 bd->bi_flashoffset = 0;
285 bd->bi_flashstart = 0;
286 bd->bi_flashsize = 0;
287 bd->bi_flashoffset = 0;
290 #ifdef CONFIG_CMD_NAND
292 nand_init(); /* go init the NAND */
295 #if defined(CONFIG_CMD_ONENAND)
299 /* relocate environment function pointers etc. */
302 #if defined(CONFIG_PCI)
304 * Do pci configuration
309 /** leave this here (after malloc(), environment and PCI are working) **/
310 /* Initialize stdio devices */
315 /* Initialize the console (after the relocation and devices init) */
317 /** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** **/
319 /* Initialize from environment */
320 load_addr = getenv_ulong("loadaddr", 16, load_addr);
322 #ifdef CONFIG_CMD_SPI
324 spi_init(); /* go init the SPI */
328 #if defined(CONFIG_MISC_INIT_R)
329 /* miscellaneous platform dependent initialisations */
333 #ifdef CONFIG_BITBANGMII
336 #if defined(CONFIG_CMD_NET)
338 eth_initialize(gd->bd);
341 /* main_loop() can return to retry autoboot, if so just run it again. */
345 /* NOTREACHED - no way out of command loop except booting */