2 * (C) Copyright 2008-2011
3 * Graeme Russ, <graeme.russ@gmail.com>
6 * Daniel Engström, Omicron Ceti AB, <daniel@omicron.se>
9 * Wolfgang Denk, DENX Software Engineering, <wd@denx.de>
12 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
13 * Marius Groeger <mgroeger@sysgo.de>
15 * See file CREDITS for list of people who contributed to this
18 * This program is free software; you can redistribute it and/or
19 * modify it under the terms of the GNU General Public License as
20 * published by the Free Software Foundation; either version 2 of
21 * the License, or (at your option) any later version.
23 * This program is distributed in the hope that it will be useful,
24 * but WITHOUT ANY WARRANTY; without even the implied warranty of
25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
26 * GNU General Public License for more details.
28 * You should have received a copy of the GNU General Public License
29 * along with this program; if not, write to the Free Software
30 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
37 #include <stdio_dev.h>
43 #include <asm/u-boot-x86.h>
45 #include <asm/processor.h>
47 #ifdef CONFIG_BITBANGMII
51 /************************************************************************
53 ************************************************************************
54 * Some of this code should be moved into the core functions,
55 * or dropped completely,
56 * but let's get it working (again) first...
58 static int init_baudrate(void)
60 gd->baudrate = getenv_ulong("baudrate", 10, CONFIG_BAUDRATE);
64 static int display_banner(void)
67 printf("\n\n%s\n\n", version_string);
72 static int display_dram_config(void)
76 puts("DRAM Configuration:\n");
78 for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
79 printf("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
80 print_size(gd->bd->bi_dram[i].size, "\n");
86 #ifndef CONFIG_SYS_NO_FLASH
87 static void display_flash_config(ulong size)
90 print_size(size, "\n");
95 * Breath some life into the board...
97 * Initialize an SMC for serial comms, and carry out some hardware
100 * The first part of initialization is running from Flash memory;
101 * its main purpose is to initialize the RAM so that we
102 * can relocate the monitor code to RAM.
106 * All attempts to come up with a "common" initialization sequence
107 * that works for all boards and architectures failed: some of the
108 * requirements are just _too_ different. To get rid of the resulting
109 * mess of board dependend #ifdef'ed code we now make the whole
110 * initialization sequence configurable to the user.
112 * The requirements for any new initalization function is simple: it
113 * receives a pointer to the "global data" structure as it's only
114 * argument, and returns an integer return code, where 0 means
115 * "continue" and != 0 means "fatal error, hang the system".
117 typedef int (init_fnc_t) (void);
119 static int calculate_relocation_address(void);
120 static int copy_uboot_to_ram(void);
121 static int clear_bss(void);
122 static int do_elf_reloc_fixups(void);
123 static int copy_gd_to_ram(void);
125 init_fnc_t *init_sequence_f[] = {
133 calculate_relocation_address,
141 init_fnc_t *init_sequence_r[] = {
143 cpu_init_r, /* basic cpu dependent setup */
144 board_early_init_r, /* basic board dependent setup */
145 dram_init, /* configure available RAM banks */
146 interrupt_init, /* set up exceptions */
154 static int calculate_relocation_address(void)
156 ulong text_start = (ulong)&__text_start;
157 ulong bss_end = (ulong)&__bss_end;
161 * NOTE: All destination address are rounded down to 16-byte
162 * boundary to satisfy various worst-case alignment
166 /* Global Data is at top of available memory */
167 dest_addr = gd->ram_size;
168 dest_addr -= GENERATED_GBL_DATA_SIZE;
170 gd->new_gd_addr = dest_addr;
172 /* GDT is below Global Data */
173 dest_addr -= X86_GDT_SIZE;
175 gd->gdt_addr = dest_addr;
177 /* Stack is below GDT */
178 gd->start_addr_sp = dest_addr;
180 /* U-Boot is below the stack */
181 dest_addr -= CONFIG_SYS_STACK_SIZE;
182 dest_addr -= (bss_end - text_start);
184 gd->relocaddr = dest_addr;
185 gd->reloc_off = (dest_addr - text_start);
190 static int copy_uboot_to_ram(void)
192 size_t len = (size_t)&__data_end - (size_t)&__text_start;
194 memcpy((void *)gd->relocaddr, (void *)&__text_start, len);
199 static int clear_bss(void)
201 ulong dst_addr = (ulong)&__bss_start + gd->reloc_off;
202 size_t len = (size_t)&__bss_end - (size_t)&__bss_start;
204 memset((void *)dst_addr, 0x00, len);
209 static int do_elf_reloc_fixups(void)
211 Elf32_Rel *re_src = (Elf32_Rel *)(&__rel_dyn_start);
212 Elf32_Rel *re_end = (Elf32_Rel *)(&__rel_dyn_end);
214 Elf32_Addr *offset_ptr_rom;
215 Elf32_Addr *offset_ptr_ram;
217 /* The size of the region of u-boot that runs out of RAM. */
218 uintptr_t size = (uintptr_t)&__bss_end - (uintptr_t)&__text_start;
221 /* Get the location from the relocation entry */
222 offset_ptr_rom = (Elf32_Addr *)re_src->r_offset;
224 /* Check that the location of the relocation is in .text */
225 if (offset_ptr_rom >= (Elf32_Addr *)CONFIG_SYS_TEXT_BASE) {
227 /* Switch to the in-RAM version */
228 offset_ptr_ram = (Elf32_Addr *)((ulong)offset_ptr_rom +
231 /* Check that the target points into .text */
232 if (*offset_ptr_ram >= CONFIG_SYS_TEXT_BASE &&
234 (CONFIG_SYS_TEXT_BASE + size)) {
235 *offset_ptr_ram += gd->reloc_off;
238 } while (re_src++ < re_end);
243 /* Load U-Boot into RAM, initialize BSS, perform relocation adjustments */
244 void board_init_f(ulong boot_flags)
246 init_fnc_t **init_fnc_ptr;
248 gd->flags = boot_flags;
250 for (init_fnc_ptr = init_sequence_f; *init_fnc_ptr; ++init_fnc_ptr) {
251 if ((*init_fnc_ptr)() != 0)
256 * SDRAM is now initialised, U-Boot has been copied into SDRAM,
257 * the BSS has been cleared etc. The final stack can now be setup
258 * in SDRAM. Code execution will continue (momentarily) in Flash,
259 * but with the stack in SDRAM and Global Data in temporary memory
262 board_init_f_r_trampoline(gd->start_addr_sp);
264 /* NOTREACHED - board_init_f_r_trampoline() does not return */
269 void board_init_f_r(void)
272 * Transfer execution from Flash to RAM by calculating the address
273 * of the in-RAM copy of board_init_r() and calling it
275 (board_init_r + gd->reloc_off)(gd, gd->relocaddr);
277 /* NOTREACHED - board_init_r() does not return */
282 static int copy_gd_to_ram(void)
287 * Global data is still in temporary memory (the CPU cache).
288 * calculate_relocation_address() has set gd->new_gd_addr to
289 * where the global data lives in RAM but getting it there
290 * safely is a bit tricky due to the 'F-Segment Hack' that
291 * we need to use for x86
293 ram_gd = (gd_t *)gd->new_gd_addr;
294 memcpy((void *)ram_gd, gd, sizeof(gd_t));
297 * Reload the Global Descriptor Table so FS points to the
298 * in-RAM copy of Global Data (calculate_relocation_address()
299 * has already calculated the in-RAM location of the GDT)
301 ram_gd->gd_addr = (ulong)ram_gd;
302 init_gd(ram_gd, (u64 *)gd->gdt_addr);
307 void board_init_r(gd_t *id, ulong dest_addr)
309 #if defined(CONFIG_CMD_NET)
312 #ifndef CONFIG_SYS_NO_FLASH
316 init_fnc_t **init_fnc_ptr;
318 show_boot_progress(0x21);
320 /* compiler optimization barrier needed for GCC >= 3.4 */
321 __asm__ __volatile__("" : : : "memory");
323 gd->flags |= GD_FLG_RELOC;
326 memset(gd->bd, 0, sizeof(bd_t));
327 show_boot_progress(0x22);
329 gd->baudrate = CONFIG_BAUDRATE;
331 mem_malloc_init((((ulong)dest_addr - CONFIG_SYS_MALLOC_LEN)+3)&~3,
332 CONFIG_SYS_MALLOC_LEN);
334 for (init_fnc_ptr = init_sequence_r; *init_fnc_ptr; ++init_fnc_ptr) {
335 if ((*init_fnc_ptr)() != 0)
338 show_boot_progress(0x23);
340 #ifdef CONFIG_SERIAL_MULTI
344 #ifndef CONFIG_SYS_NO_FLASH
345 /* configure available FLASH banks */
347 display_flash_config(size);
348 show_boot_progress(0x24);
351 show_boot_progress(0x25);
353 /* initialize environment */
355 show_boot_progress(0x26);
358 #ifdef CONFIG_CMD_NET
360 bd_data.bi_ip_addr = getenv_IPaddr("ipaddr");
363 #if defined(CONFIG_PCI)
365 * Do pci configuration
370 show_boot_progress(0x27);
377 /* Initialize the console (after the relocation and devices init) */
380 #ifdef CONFIG_MISC_INIT_R
381 /* miscellaneous platform dependent initialisations */
385 #if defined(CONFIG_CMD_PCMCIA) && !defined(CONFIG_CMD_IDE)
391 #if defined(CONFIG_CMD_KGDB)
397 /* enable exceptions */
399 show_boot_progress(0x28);
401 #ifdef CONFIG_STATUS_LED
402 status_led_set(STATUS_LED_BOOT, STATUS_LED_BLINKING);
407 /* Initialize from environment */
408 load_addr = getenv_ulong("loadaddr", 16, load_addr);
409 #if defined(CONFIG_CMD_NET)
410 s = getenv("bootfile");
413 copy_filename(BootFile, s, sizeof(BootFile));
418 #if defined(CONFIG_CMD_IDE)
424 #if defined(CONFIG_CMD_SCSI)
430 #if defined(CONFIG_CMD_DOC)
436 #ifdef CONFIG_BITBANGMII
439 #if defined(CONFIG_CMD_NET)
442 eth_initialize(gd->bd);
445 #if (defined(CONFIG_CMD_NET)) && (0)
448 puts("Reset Ethernet PHY\n");
453 #ifdef CONFIG_LAST_STAGE_INIT
456 * Some parts can be only initialized if all others (like
457 * Interrupts) are up and running (i.e. the PC-style ISA
465 post_run(NULL, POST_RAM | post_bootmode_get(0));
468 show_boot_progress(0x29);
470 /* main_loop() can return to retry autoboot, if so just run it again. */
474 /* NOTREACHED - no way out of command loop except booting */
479 puts("### ERROR ### Please RESET the board ###\n");
484 unsigned long do_go_exec(ulong (*entry)(int, char * const []),
485 int argc, char * const argv[])
487 unsigned long ret = 0;
491 * x86 does not use a dedicated register to pass the pointer to
492 * the global_data, so it is instead passed as argv[-1]. By using
493 * argv[-1], the called 'Application' can use the contents of
494 * argv natively. However, to safely use argv[-1] a new copy of
495 * argv is needed with the extra element
497 argv_tmp = malloc(sizeof(char *) * (argc + 1));
500 argv_tmp[0] = (char *)gd;
502 memcpy(&argv_tmp[1], argv, (size_t)(sizeof(char *) * argc));
504 ret = (entry) (argc, &argv_tmp[1]);
511 void setup_pcat_compatibility(void)
512 __attribute__((weak, alias("__setup_pcat_compatibility")));
514 void __setup_pcat_compatibility(void)