3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * SPDX-License-Identifier: GPL-2.0+
12 #include <stdio_dev.h>
15 #include <environment.h>
17 #include <onenand_uboot.h>
20 #ifdef CONFIG_BITBANGMII
24 DECLARE_GLOBAL_DATA_PTR;
26 ulong monitor_flash_len;
28 static char *failed = "*** failed ***\n";
30 int __board_early_init_f(void)
33 * Nothing to do in this dummy implementation
37 int board_early_init_f(void)
38 __attribute__((weak, alias("__board_early_init_f")));
40 static int init_func_ram(void)
42 #ifdef CONFIG_BOARD_TYPES
43 int board_type = gd->board_type;
45 int board_type = 0; /* use dummy arg */
49 gd->ram_size = initdram(board_type);
50 if (gd->ram_size > 0) {
51 print_size(gd->ram_size, "\n");
58 static int display_banner(void)
61 printf("\n\n%s\n\n", version_string);
65 #ifndef CONFIG_SYS_NO_FLASH
66 static void display_flash_config(ulong size)
69 print_size(size, "\n");
73 static int init_baudrate(void)
75 gd->baudrate = getenv_ulong("baudrate", 10, CONFIG_BAUDRATE);
81 * Breath some life into the board...
83 * The first part of initialization is running from Flash memory;
84 * its main purpose is to initialize the RAM so that we
85 * can relocate the monitor code to RAM.
89 * All attempts to come up with a "common" initialization sequence
90 * that works for all boards and architectures failed: some of the
91 * requirements are just _too_ different. To get rid of the resulting
92 * mess of board dependend #ifdef'ed code we now make the whole
93 * initialization sequence configurable to the user.
95 * The requirements for any new initalization function is simple: it
96 * receives a pointer to the "global data" structure as it's only
97 * argument, and returns an integer return code, where 0 means
98 * "continue" and != 0 means "fatal error, hang the system".
100 typedef int (init_fnc_t)(void);
102 init_fnc_t *init_sequence[] = {
105 env_init, /* initialize environment */
106 #ifdef CONFIG_INCA_IP
107 incaip_set_cpuclk, /* set cpu clock according to env. variable */
109 init_baudrate, /* initialize baudrate settings */
110 serial_init, /* serial communications setup */
112 display_banner, /* say that we are here */
119 void board_init_f(ulong bootflag)
123 init_fnc_t **init_fnc_ptr;
124 ulong addr, addr_sp, len;
127 /* Pointer is writable since we allocated a register for it.
130 /* compiler optimization barrier needed for GCC >= 3.4 */
131 __asm__ __volatile__("" : : : "memory");
133 memset((void *)gd, 0, sizeof(gd_t));
135 for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
136 if ((*init_fnc_ptr)() != 0)
141 * Now that we have DRAM mapped and working, we can
142 * relocate the code and continue running from DRAM.
144 addr = CONFIG_SYS_SDRAM_BASE + gd->ram_size;
146 /* We can reserve some RAM "on top" here.
149 /* round down to next 4 kB limit.
152 debug("Top of RAM usable for U-Boot at: %08lx\n", addr);
154 /* Reserve memory for U-Boot code, data & bss
155 * round down to next 16 kB limit
157 len = bss_end() - CONFIG_SYS_MONITOR_BASE;
159 addr &= ~(16 * 1024 - 1);
161 debug("Reserving %ldk for U-Boot at: %08lx\n", len >> 10, addr);
163 /* Reserve memory for malloc() arena.
165 addr_sp = addr - TOTAL_MALLOC_LEN;
166 debug("Reserving %dk for malloc() at: %08lx\n",
167 TOTAL_MALLOC_LEN >> 10, addr_sp);
170 * (permanently) allocate a Board Info struct
171 * and a permanent copy of the "global" data
173 addr_sp -= sizeof(bd_t);
174 bd = (bd_t *)addr_sp;
176 debug("Reserving %zu Bytes for Board Info at: %08lx\n",
177 sizeof(bd_t), addr_sp);
179 addr_sp -= sizeof(gd_t);
180 id = (gd_t *)addr_sp;
181 debug("Reserving %zu Bytes for Global Data at: %08lx\n",
182 sizeof(gd_t), addr_sp);
184 /* Reserve memory for boot params.
186 addr_sp -= CONFIG_SYS_BOOTPARAMS_LEN;
187 bd->bi_boot_params = addr_sp;
188 debug("Reserving %dk for boot params() at: %08lx\n",
189 CONFIG_SYS_BOOTPARAMS_LEN >> 10, addr_sp);
192 * Finally, we set up a new (bigger) stack.
194 * Leave some safety gap for SP, force alignment on 16 byte boundary
195 * Clear initial stack frame
199 s = (ulong *)addr_sp;
203 debug("Stack Pointer at: %08lx\n", addr_sp);
206 * Save local variables to board info struct
208 bd->bi_memstart = CONFIG_SYS_SDRAM_BASE; /* start of DRAM */
209 bd->bi_memsize = gd->ram_size; /* size of DRAM in bytes */
210 bd->bi_baudrate = gd->baudrate; /* Console Baudrate */
212 memcpy(id, (void *)gd, sizeof(gd_t));
214 relocate_code(addr_sp, id, addr);
216 /* NOTREACHED - relocate_code() does not return */
220 * This is the next part if the initialization sequence: we are now
221 * running from RAM and have a "normal" C environment, i. e. global
222 * data can be written, BSS has been cleared, the stack size in not
223 * that critical any more, etc.
226 void board_init_r(gd_t *id, ulong dest_addr)
228 #ifndef CONFIG_SYS_NO_FLASH
234 gd->flags |= GD_FLG_RELOC; /* tell others: relocation done */
236 debug("Now running in RAM - U-Boot at: %08lx\n", dest_addr);
238 gd->reloc_off = dest_addr - CONFIG_SYS_MONITOR_BASE;
240 monitor_flash_len = image_copy_end() - dest_addr;
246 /* The Malloc area is immediately below the monitor copy in DRAM */
247 mem_malloc_init(CONFIG_SYS_MONITOR_BASE + gd->reloc_off -
248 TOTAL_MALLOC_LEN, TOTAL_MALLOC_LEN);
250 #ifndef CONFIG_SYS_NO_FLASH
251 /* configure available FLASH banks */
253 display_flash_config(size);
254 bd->bi_flashstart = CONFIG_SYS_FLASH_BASE;
255 bd->bi_flashsize = size;
257 #if CONFIG_SYS_MONITOR_BASE == CONFIG_SYS_FLASH_BASE
258 bd->bi_flashoffset = monitor_flash_len; /* reserved area for U-Boot */
260 bd->bi_flashoffset = 0;
263 bd->bi_flashstart = 0;
264 bd->bi_flashsize = 0;
265 bd->bi_flashoffset = 0;
268 #ifdef CONFIG_CMD_NAND
270 nand_init(); /* go init the NAND */
273 #if defined(CONFIG_CMD_ONENAND)
277 /* relocate environment function pointers etc. */
280 #if defined(CONFIG_PCI)
282 * Do pci configuration
287 /** leave this here (after malloc(), environment and PCI are working) **/
288 /* Initialize stdio devices */
293 /* Initialize the console (after the relocation and devices init) */
295 /** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** **/
297 /* Initialize from environment */
298 load_addr = getenv_ulong("loadaddr", 16, load_addr);
300 #ifdef CONFIG_CMD_SPI
302 spi_init(); /* go init the SPI */
306 #if defined(CONFIG_MISC_INIT_R)
307 /* miscellaneous platform dependent initialisations */
311 #ifdef CONFIG_BITBANGMII
314 #if defined(CONFIG_CMD_NET)
316 eth_initialize(gd->bd);
319 /* main_loop() can return to retry autoboot, if so just run it again. */
323 /* NOTREACHED - no way out of command loop except booting */