1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (c) 2011 The Chromium OS Authors.
4 * (C) Copyright 2002-2006
8 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
14 #include <bootstage.h>
15 #include <clock_legacy.h>
20 #include <display_options.h>
23 #include <env_internal.h>
39 #include <status_led.h>
45 #include <asm/cache.h>
46 #include <asm/global_data.h>
48 #include <asm/sections.h>
50 #include <linux/errno.h>
51 #include <linux/log2.h>
53 DECLARE_GLOBAL_DATA_PTR;
57 * refactored to a single function, something like:
59 * void led_set_state(enum led_colour_t colour, int on);
61 /************************************************************************
62 * Coloured LED functionality
63 ************************************************************************
64 * May be supplied by boards if desired
66 __weak void coloured_LED_init(void) {}
67 __weak void red_led_on(void) {}
68 __weak void red_led_off(void) {}
69 __weak void green_led_on(void) {}
70 __weak void green_led_off(void) {}
71 __weak void yellow_led_on(void) {}
72 __weak void yellow_led_off(void) {}
73 __weak void blue_led_on(void) {}
74 __weak void blue_led_off(void) {}
77 * Why is gd allocated a register? Prior to reloc it might be better to
78 * just pass it around to each function in this file?
80 * After reloc one could argue that it is hardly used and doesn't need
81 * to be in a register. Or if it is it should perhaps hold pointers to all
82 * global data for all modules, so that post-reloc we can avoid the massive
83 * literal pool we get on ARM. Or perhaps just encourage each module to use
87 #if defined(CONFIG_WATCHDOG) || defined(CONFIG_HW_WATCHDOG)
88 static int init_func_watchdog_init(void)
90 # if defined(CONFIG_HW_WATCHDOG) && \
91 (defined(CONFIG_M68K) || defined(CONFIG_MICROBLAZE) || \
92 defined(CONFIG_SH) || \
93 defined(CONFIG_DESIGNWARE_WATCHDOG) || \
94 defined(CONFIG_IMX_WATCHDOG))
96 puts(" Watchdog enabled\n");
103 int init_func_watchdog_reset(void)
109 #endif /* CONFIG_WATCHDOG */
111 __weak void board_add_ram_info(int use_default)
113 /* please define platform specific board_add_ram_info() */
116 static int init_baud_rate(void)
118 gd->baudrate = env_get_ulong("baudrate", 10, CONFIG_BAUDRATE);
122 static int display_text_info(void)
124 #if !defined(CONFIG_SANDBOX) && !defined(CONFIG_EFI_APP)
125 ulong bss_start, bss_end, text_base;
127 bss_start = (ulong)__bss_start;
128 bss_end = (ulong)__bss_end;
130 #ifdef CONFIG_TEXT_BASE
131 text_base = CONFIG_TEXT_BASE;
133 text_base = CONFIG_SYS_MONITOR_BASE;
136 debug("U-Boot code: %08lX -> %08lX BSS: -> %08lX\n",
137 text_base, bss_start, bss_end);
143 #ifdef CONFIG_SYSRESET
144 static int print_resetinfo(void)
148 bool status_printed = false;
152 * Not all boards have sysreset drivers available during early
153 * boot, so don't fail if one can't be found.
155 for (ret = uclass_first_device_check(UCLASS_SYSRESET, &dev); dev;
156 ret = uclass_next_device_check(&dev)) {
158 debug("%s: %s sysreset device (error: %d)\n",
159 __func__, dev->name, ret);
163 if (!sysreset_get_status(dev, status, sizeof(status))) {
164 printf("%s%s", status_printed ? " " : "", status);
165 status_printed = true;
175 #if defined(CONFIG_DISPLAY_CPUINFO) && CONFIG_IS_ENABLED(CPU)
176 static int print_cpuinfo(void)
182 dev = cpu_get_current_dev();
184 debug("%s: Could not get CPU device\n",
189 ret = cpu_get_desc(dev, desc, sizeof(desc));
191 debug("%s: Could not get CPU description (err = %d)\n",
196 printf("CPU: %s\n", desc);
202 static int announce_dram_init(void)
209 * From input size calculate its nearest rounded unit scale (multiply of 2^10)
210 * and value in calculated unit scale multiplied by 10 (as fractional fixed
211 * point number with one decimal digit), which is human natural format,
212 * same what uses print_size() function for displaying. Mathematically it is:
213 * round_nearest(val * 2^scale) = size * 10; where: 10 <= val < 10240.
215 * For example for size=87654321 we calculate scale=20 and val=836 which means
216 * that input has natural human format 83.6 M (mega = 2^20).
218 #define compute_size_scale_val(size, scale, val) do { \
219 scale = ilog2(size) / 10 * 10; \
220 val = (10 * size + ((1ULL << scale) >> 1)) >> scale; \
221 if (val == 10240) { val = 10; scale += 10; } \
225 * Check if the sizes in their natural units written in decimal format with
226 * one fraction number are same.
228 static int sizes_near(unsigned long long size1, unsigned long long size2)
230 unsigned int size1_scale, size1_val, size2_scale, size2_val;
232 compute_size_scale_val(size1, size1_scale, size1_val);
233 compute_size_scale_val(size2, size2_scale, size2_val);
235 return size1_scale == size2_scale && size1_val == size2_val;
238 static int show_dram_config(void)
240 unsigned long long size;
243 debug("\nRAM Configuration:\n");
244 for (i = size = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
245 size += gd->bd->bi_dram[i].size;
246 debug("Bank #%d: %llx ", i,
247 (unsigned long long)(gd->bd->bi_dram[i].start));
249 print_size(gd->bd->bi_dram[i].size, "\n");
254 print_size(gd->ram_size, "");
255 if (!sizes_near(gd->ram_size, size)) {
256 printf(" (effective ");
257 print_size(size, ")");
259 board_add_ram_info(0);
265 __weak int dram_init_banksize(void)
267 gd->bd->bi_dram[0].start = gd->ram_base;
268 gd->bd->bi_dram[0].size = get_effective_memsize();
273 #if CONFIG_IS_ENABLED(SYS_I2C_LEGACY)
274 static int init_func_i2c(void)
283 static int setup_mon_len(void)
285 #if defined(__ARM__) || defined(__MICROBLAZE__)
286 gd->mon_len = (ulong)__bss_end - (ulong)_start;
287 #elif defined(CONFIG_SANDBOX) && !defined(__riscv)
288 gd->mon_len = (ulong)_end - (ulong)_init;
289 #elif defined(CONFIG_SANDBOX)
290 /* gcc does not provide _init in crti.o on RISC-V */
292 #elif defined(CONFIG_EFI_APP)
293 gd->mon_len = (ulong)_end - (ulong)_init;
294 #elif defined(CONFIG_NIOS2) || defined(CONFIG_XTENSA)
295 gd->mon_len = CONFIG_SYS_MONITOR_LEN;
296 #elif defined(CONFIG_SH) || defined(CONFIG_RISCV)
297 gd->mon_len = (ulong)(__bss_end) - (ulong)(_start);
298 #elif defined(CONFIG_SYS_MONITOR_BASE)
299 /* TODO: use (ulong)__bss_end - (ulong)__text_start; ? */
300 gd->mon_len = (ulong)__bss_end - CONFIG_SYS_MONITOR_BASE;
305 static int setup_spl_handoff(void)
307 #if CONFIG_IS_ENABLED(HANDOFF)
308 gd->spl_handoff = bloblist_find(BLOBLISTT_U_BOOT_SPL_HANDOFF,
309 sizeof(struct spl_handoff));
310 debug("Found SPL hand-off info %p\n", gd->spl_handoff);
316 __weak int arch_cpu_init(void)
321 __weak int mach_cpu_init(void)
326 /* Get the top of usable RAM */
327 __weak phys_addr_t board_get_usable_ram_top(phys_size_t total_size)
329 #if defined(CFG_SYS_SDRAM_BASE) && CFG_SYS_SDRAM_BASE > 0
331 * Detect whether we have so much RAM that it goes past the end of our
332 * 32-bit address space. If so, clip the usable RAM so it doesn't.
334 if (gd->ram_top < CFG_SYS_SDRAM_BASE)
336 * Will wrap back to top of 32-bit space when reservations
344 __weak int arch_setup_dest_addr(void)
349 static int setup_dest_addr(void)
351 debug("Monitor len: %08lX\n", gd->mon_len);
353 * Ram is setup, size stored in gd !!
355 debug("Ram size: %08llX\n", (unsigned long long)gd->ram_size);
356 #if CONFIG_VAL(SYS_MEM_TOP_HIDE)
358 * Subtract specified amount of memory to hide so that it won't
359 * get "touched" at all by U-Boot. By fixing up gd->ram_size
360 * the Linux kernel should now get passed the now "corrected"
361 * memory size and won't touch it either. This should work
362 * for arch/ppc and arch/powerpc. Only Linux board ports in
363 * arch/powerpc with bootwrapper support, that recalculate the
364 * memory size from the SDRAM controller setup will have to
367 gd->ram_size -= CONFIG_SYS_MEM_TOP_HIDE;
369 #ifdef CFG_SYS_SDRAM_BASE
370 gd->ram_base = CFG_SYS_SDRAM_BASE;
372 gd->ram_top = gd->ram_base + get_effective_memsize();
373 gd->ram_top = board_get_usable_ram_top(gd->mon_len);
374 gd->relocaddr = gd->ram_top;
375 debug("Ram top: %08llX\n", (unsigned long long)gd->ram_top);
377 return arch_setup_dest_addr();
381 /* reserve protected RAM */
382 static int reserve_pram(void)
386 reg = env_get_ulong("pram", 10, CFG_PRAM);
387 gd->relocaddr -= (reg << 10); /* size is in kB */
388 debug("Reserving %ldk for protected RAM at %08lx\n", reg,
392 #endif /* CFG_PRAM */
394 /* Round memory pointer down to next 4 kB limit */
395 static int reserve_round_4k(void)
397 gd->relocaddr &= ~(4096 - 1);
401 __weak int arch_reserve_mmu(void)
406 static int reserve_video(void)
408 if (IS_ENABLED(CONFIG_SPL_VIDEO_HANDOFF) && spl_phase() > PHASE_SPL) {
409 struct video_handoff *ho;
411 ho = bloblist_find(BLOBLISTT_U_BOOT_VIDEO, sizeof(*ho));
413 return log_msg_ret("blf", -ENOENT);
414 video_reserve_from_bloblist(ho);
415 gd->relocaddr = ho->fb;
416 } else if (CONFIG_IS_ENABLED(VIDEO)) {
420 addr = gd->relocaddr;
421 ret = video_reserve(&addr);
424 debug("Reserving %luk for video at: %08lx\n",
425 ((unsigned long)gd->relocaddr - addr) >> 10, addr);
426 gd->relocaddr = addr;
432 static int reserve_trace(void)
435 gd->relocaddr -= CONFIG_TRACE_BUFFER_SIZE;
436 gd->trace_buff = map_sysmem(gd->relocaddr, CONFIG_TRACE_BUFFER_SIZE);
437 debug("Reserving %luk for trace data at: %08lx\n",
438 (unsigned long)CONFIG_TRACE_BUFFER_SIZE >> 10, gd->relocaddr);
444 static int reserve_uboot(void)
446 if (!(gd->flags & GD_FLG_SKIP_RELOC)) {
448 * reserve memory for U-Boot code, data & bss
449 * round down to next 4 kB limit
451 gd->relocaddr -= gd->mon_len;
452 gd->relocaddr &= ~(4096 - 1);
453 #if defined(CONFIG_E500) || defined(CONFIG_MIPS)
454 /* round down to next 64 kB limit so that IVPR stays aligned */
455 gd->relocaddr &= ~(65536 - 1);
458 debug("Reserving %ldk for U-Boot at: %08lx\n",
459 gd->mon_len >> 10, gd->relocaddr);
462 gd->start_addr_sp = gd->relocaddr;
468 * reserve after start_addr_sp the requested size and make the stack pointer
469 * 16-byte aligned, this alignment is needed for cast on the reserved memory
470 * ref = x86_64 ABI: https://reviews.llvm.org/D30049: 16 bytes
471 * = ARMv8 Instruction Set Overview: quad word, 16 bytes
473 static unsigned long reserve_stack_aligned(size_t size)
475 return ALIGN_DOWN(gd->start_addr_sp - size, 16);
478 #ifdef CONFIG_SYS_NONCACHED_MEMORY
479 static int reserve_noncached(void)
482 * The value of gd->start_addr_sp must match the value of malloc_start
483 * calculated in board_r.c:initr_malloc(), which is passed to
484 * dlmalloc.c:mem_malloc_init() and then used by
485 * cache.c:noncached_init()
487 * These calculations must match the code in cache.c:noncached_init()
489 gd->start_addr_sp = ALIGN(gd->start_addr_sp, MMU_SECTION_SIZE) -
491 gd->start_addr_sp -= ALIGN(CONFIG_SYS_NONCACHED_MEMORY,
493 debug("Reserving %dM for noncached_alloc() at: %08lx\n",
494 CONFIG_SYS_NONCACHED_MEMORY >> 20, gd->start_addr_sp);
500 /* reserve memory for malloc() area */
501 static int reserve_malloc(void)
503 gd->start_addr_sp = reserve_stack_aligned(TOTAL_MALLOC_LEN);
504 debug("Reserving %dk for malloc() at: %08lx\n",
505 TOTAL_MALLOC_LEN >> 10, gd->start_addr_sp);
506 #ifdef CONFIG_SYS_NONCACHED_MEMORY
513 /* (permanently) allocate a Board Info struct */
514 static int reserve_board(void)
517 gd->start_addr_sp = reserve_stack_aligned(sizeof(struct bd_info));
518 gd->bd = (struct bd_info *)map_sysmem(gd->start_addr_sp,
519 sizeof(struct bd_info));
520 memset(gd->bd, '\0', sizeof(struct bd_info));
521 debug("Reserving %zu Bytes for Board Info at: %08lx\n",
522 sizeof(struct bd_info), gd->start_addr_sp);
527 static int reserve_global_data(void)
529 gd->start_addr_sp = reserve_stack_aligned(sizeof(gd_t));
530 gd->new_gd = (gd_t *)map_sysmem(gd->start_addr_sp, sizeof(gd_t));
531 debug("Reserving %zu Bytes for Global Data at: %08lx\n",
532 sizeof(gd_t), gd->start_addr_sp);
536 static int reserve_fdt(void)
538 if (!IS_ENABLED(CONFIG_OF_EMBED)) {
540 * If the device tree is sitting immediately above our image
541 * then we must relocate it. If it is embedded in the data
542 * section, then it will be relocated with other data.
545 gd->fdt_size = ALIGN(fdt_totalsize(gd->fdt_blob), 32);
547 gd->start_addr_sp = reserve_stack_aligned(gd->fdt_size);
548 gd->new_fdt = map_sysmem(gd->start_addr_sp, gd->fdt_size);
549 debug("Reserving %lu Bytes for FDT at: %08lx\n",
550 gd->fdt_size, gd->start_addr_sp);
557 static int reserve_bootstage(void)
559 #ifdef CONFIG_BOOTSTAGE
560 int size = bootstage_get_size();
562 gd->start_addr_sp = reserve_stack_aligned(size);
563 gd->new_bootstage = map_sysmem(gd->start_addr_sp, size);
564 debug("Reserving %#x Bytes for bootstage at: %08lx\n", size,
571 __weak int arch_reserve_stacks(void)
576 static int reserve_stacks(void)
578 /* make stack pointer 16-byte aligned */
579 gd->start_addr_sp = reserve_stack_aligned(16);
582 * let the architecture-specific code tailor gd->start_addr_sp and
585 return arch_reserve_stacks();
588 static int reserve_bloblist(void)
590 #ifdef CONFIG_BLOBLIST
591 /* Align to a 4KB boundary for easier reading of addresses */
592 gd->start_addr_sp = ALIGN_DOWN(gd->start_addr_sp -
593 CONFIG_BLOBLIST_SIZE_RELOC, 0x1000);
594 gd->new_bloblist = map_sysmem(gd->start_addr_sp,
595 CONFIG_BLOBLIST_SIZE_RELOC);
601 static int display_new_sp(void)
603 debug("New Stack Pointer is: %08lx\n", gd->start_addr_sp);
608 __weak int arch_setup_bdinfo(void)
613 int setup_bdinfo(void)
615 struct bd_info *bd = gd->bd;
617 if (IS_ENABLED(CONFIG_SYS_HAS_SRAM)) {
618 bd->bi_sramstart = CONFIG_SYS_SRAM_BASE; /* start of SRAM */
619 bd->bi_sramsize = CONFIG_SYS_SRAM_SIZE; /* size of SRAM */
622 return arch_setup_bdinfo();
626 static int init_post(void)
628 post_bootmode_init();
629 post_run(NULL, POST_ROM | post_bootmode_get(0));
635 static int reloc_fdt(void)
637 if (!IS_ENABLED(CONFIG_OF_EMBED)) {
639 memcpy(gd->new_fdt, gd->fdt_blob,
640 fdt_totalsize(gd->fdt_blob));
641 gd->fdt_blob = gd->new_fdt;
648 static int reloc_bootstage(void)
650 #ifdef CONFIG_BOOTSTAGE
651 if (gd->flags & GD_FLG_SKIP_RELOC)
653 if (gd->new_bootstage) {
654 int size = bootstage_get_size();
656 debug("Copying bootstage from %p to %p, size %x\n",
657 gd->bootstage, gd->new_bootstage, size);
658 memcpy(gd->new_bootstage, gd->bootstage, size);
659 gd->bootstage = gd->new_bootstage;
660 bootstage_relocate();
667 static int reloc_bloblist(void)
669 #ifdef CONFIG_BLOBLIST
671 * Relocate only if we are supposed to send it
673 if ((gd->flags & GD_FLG_SKIP_RELOC) &&
674 CONFIG_BLOBLIST_SIZE == CONFIG_BLOBLIST_SIZE_RELOC) {
675 debug("Not relocating bloblist\n");
678 if (gd->new_bloblist) {
679 int size = CONFIG_BLOBLIST_SIZE;
681 debug("Copying bloblist from %p to %p, size %x\n",
682 gd->bloblist, gd->new_bloblist, size);
683 bloblist_reloc(gd->new_bloblist, CONFIG_BLOBLIST_SIZE_RELOC,
685 gd->bloblist = gd->new_bloblist;
692 static int setup_reloc(void)
694 if (!(gd->flags & GD_FLG_SKIP_RELOC)) {
695 #ifdef CONFIG_TEXT_BASE
697 gd->reloc_off = gd->relocaddr - (unsigned long)__image_copy_start;
698 #elif defined(CONFIG_MICROBLAZE)
699 gd->reloc_off = gd->relocaddr - (u32)_start;
700 #elif defined(CONFIG_M68K)
702 * On all ColdFire arch cpu, monitor code starts always
703 * just after the default vector table location, so at 0x400
705 gd->reloc_off = gd->relocaddr - (CONFIG_TEXT_BASE + 0x400);
706 #elif !defined(CONFIG_SANDBOX)
707 gd->reloc_off = gd->relocaddr - CONFIG_TEXT_BASE;
712 memcpy(gd->new_gd, (char *)gd, sizeof(gd_t));
714 if (gd->flags & GD_FLG_SKIP_RELOC) {
715 debug("Skipping relocation due to flag\n");
717 debug("Relocation Offset is: %08lx\n", gd->reloc_off);
718 debug("Relocating to %08lx, new gd at %08lx, sp at %08lx\n",
719 gd->relocaddr, (ulong)map_to_sysmem(gd->new_gd),
726 #ifdef CONFIG_OF_BOARD_FIXUP
727 static int fix_fdt(void)
729 return board_fix_fdt((void *)gd->fdt_blob);
733 /* ARM calls relocate_code from its crt0.S */
734 #if !defined(CONFIG_ARM) && !defined(CONFIG_SANDBOX)
736 static int jump_to_copy(void)
738 if (gd->flags & GD_FLG_SKIP_RELOC)
741 * x86 is special, but in a nice way. It uses a trampoline which
742 * enables the dcache if possible.
744 * For now, other archs use relocate_code(), which is implemented
745 * similarly for all archs. When we do generic relocation, hopefully
746 * we can make all archs enable the dcache prior to relocation.
748 #if defined(CONFIG_X86) || defined(CONFIG_ARC)
750 * SDRAM and console are now initialised. The final stack can now
751 * be setup in SDRAM. Code execution will continue in Flash, but
752 * with the stack in SDRAM and Global Data in temporary memory
755 arch_setup_gd(gd->new_gd);
756 # if CONFIG_IS_ENABLED(X86_64)
757 board_init_f_r_trampoline64(gd->new_gd, gd->start_addr_sp);
759 board_init_f_r_trampoline(gd->start_addr_sp);
762 relocate_code(gd->start_addr_sp, gd->new_gd, gd->relocaddr);
769 /* Record the board_init_f() bootstage (after arch_cpu_init()) */
770 static int initf_bootstage(void)
772 bool from_spl = IS_ENABLED(CONFIG_SPL_BOOTSTAGE) &&
773 IS_ENABLED(CONFIG_BOOTSTAGE_STASH);
776 ret = bootstage_init(!from_spl);
780 const void *stash = map_sysmem(CONFIG_BOOTSTAGE_STASH_ADDR,
781 CONFIG_BOOTSTAGE_STASH_SIZE);
783 ret = bootstage_unstash(stash, CONFIG_BOOTSTAGE_STASH_SIZE);
784 if (ret && ret != -ENOENT) {
785 debug("Failed to unstash bootstage: err=%d\n", ret);
790 bootstage_mark_name(BOOTSTAGE_ID_START_UBOOT_F, "board_init_f");
795 static int initf_dm(void)
797 #if defined(CONFIG_DM) && CONFIG_VAL(SYS_MALLOC_F_LEN)
800 bootstage_start(BOOTSTAGE_ID_ACCUM_DM_F, "dm_f");
801 ret = dm_init_and_scan(true);
802 bootstage_accum(BOOTSTAGE_ID_ACCUM_DM_F);
806 if (IS_ENABLED(CONFIG_TIMER_EARLY)) {
807 ret = dm_timer_init();
816 /* Architecture-specific memory reservation */
817 __weak int reserve_arch(void)
822 __weak int checkcpu(void)
827 __weak int clear_bss(void)
832 static const init_fnc_t init_sequence_f[] = {
834 #ifdef CONFIG_OF_CONTROL
837 #ifdef CONFIG_TRACE_EARLY
842 initf_bootstage, /* uses its own timer, so does not need DM */
844 #ifdef CONFIG_BLOBLIST
848 #if defined(CONFIG_CONSOLE_RECORD_INIT_F)
851 INITCALL_EVENT(EVT_FSP_INIT_F),
852 arch_cpu_init, /* basic arch cpu dependent setup */
853 mach_cpu_init, /* SoC/machine dependent CPU setup */
855 #if defined(CONFIG_BOARD_EARLY_INIT_F)
858 #if defined(CONFIG_PPC) || defined(CONFIG_SYS_FSL_CLK) || defined(CONFIG_M68K)
859 /* get CPU and bus clocks according to the environment variable */
860 get_clocks, /* get CPU and bus clocks (etc.) */
862 #if !defined(CONFIG_M68K) || (defined(CONFIG_M68K) && !defined(CONFIG_MCFTMR))
863 timer_init, /* initialize timer */
865 #if defined(CONFIG_BOARD_POSTCLK_INIT)
868 env_init, /* initialize environment */
869 init_baud_rate, /* initialze baudrate settings */
870 serial_init, /* serial communications setup */
871 console_init_f, /* stage 1 init of console */
872 display_options, /* say that we are here */
873 display_text_info, /* show debugging info if required */
875 #if defined(CONFIG_SYSRESET)
878 #if defined(CONFIG_DISPLAY_CPUINFO)
879 print_cpuinfo, /* display cpu info (and speed) */
881 #if defined(CONFIG_DTB_RESELECT)
884 #if defined(CONFIG_DISPLAY_BOARDINFO)
887 INIT_FUNC_WATCHDOG_INIT
888 INITCALL_EVENT(EVT_MISC_INIT_F),
889 INIT_FUNC_WATCHDOG_RESET
890 #if CONFIG_IS_ENABLED(SYS_I2C_LEGACY)
894 dram_init, /* configure available RAM banks */
898 INIT_FUNC_WATCHDOG_RESET
899 #if defined(CFG_SYS_DRAM_TEST)
901 #endif /* CFG_SYS_DRAM_TEST */
902 INIT_FUNC_WATCHDOG_RESET
907 INIT_FUNC_WATCHDOG_RESET
909 * Now that we have DRAM mapped and working, we can
910 * relocate the code and continue running from DRAM.
912 * Reserve memory at end of RAM for (top down in that order):
913 * - area that won't get touched by U-Boot and Linux (optional)
914 * - kernel log buffer
918 * - board info struct
921 #ifdef CONFIG_OF_BOARD_FIXUP
942 INIT_FUNC_WATCHDOG_RESET
945 INIT_FUNC_WATCHDOG_RESET
950 #if defined(CONFIG_X86) || defined(CONFIG_ARC)
956 * Deregister all cyclic functions before relocation, so that
957 * gd->cyclic_list does not contain any references to pre-relocation
958 * devices. Drivers will register their cyclic functions anew when the
959 * devices are probed again.
961 * This should happen as late as possible so that the window where a
962 * watchdog device is not serviced is as small as possible.
964 cyclic_unregister_all,
965 #if !defined(CONFIG_ARM) && !defined(CONFIG_SANDBOX)
971 void board_init_f(ulong boot_flags)
973 gd->flags = boot_flags;
974 gd->have_console = 0;
976 if (initcall_run_list(init_sequence_f))
979 #if !defined(CONFIG_ARM) && !defined(CONFIG_SANDBOX) && \
980 !defined(CONFIG_EFI_APP) && !CONFIG_IS_ENABLED(X86_64) && \
982 /* NOTREACHED - jump_to_copy() does not return */
987 #if defined(CONFIG_X86) || defined(CONFIG_ARC)
989 * For now this code is only used on x86.
991 * init_sequence_f_r is the list of init functions which are run when
992 * U-Boot is executing from Flash with a semi-limited 'C' environment.
993 * The following limitations must be considered when implementing an
995 * - 'static' variables are read-only
996 * - Global Data (gd->xxx) is read/write
998 * The '_f_r' sequence must, as a minimum, copy U-Boot to RAM (if
999 * supported). It _should_, if possible, copy global data to RAM and
1000 * initialise the CPU caches (to speed up the relocation process)
1002 * NOTE: At present only x86 uses this route, but it is intended that
1003 * all archs will move to this when generic relocation is implemented.
1005 static const init_fnc_t init_sequence_f_r[] = {
1006 #if !CONFIG_IS_ENABLED(X86_64)
1013 void board_init_f_r(void)
1015 if (initcall_run_list(init_sequence_f_r))
1019 * The pre-relocation drivers may be using memory that has now gone
1020 * away. Mark serial as unavailable - this will fall back to the debug
1021 * UART if available.
1023 * Do the same with log drivers since the memory may not be available.
1025 gd->flags &= ~(GD_FLG_SERIAL_READY | GD_FLG_LOG_READY);
1031 * U-Boot has been copied into SDRAM, the BSS has been cleared etc.
1032 * Transfer execution from Flash to RAM by calculating the address
1033 * of the in-RAM copy of board_init_r() and calling it
1035 (board_init_r + gd->reloc_off)((gd_t *)gd, gd->relocaddr);
1037 /* NOTREACHED - board_init_r() does not return */
1040 #endif /* CONFIG_X86 */