2 * Copyright (c) 2011 The Chromium OS Authors.
3 * (C) Copyright 2002-2006
4 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
7 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
8 * Marius Groeger <mgroeger@sysgo.de>
10 * SPDX-License-Identifier: GPL-2.0+
15 #include <environment.h>
21 #include <init_helpers.h>
29 #include <status_led.h>
34 #ifdef CONFIG_MACH_TYPE
35 #include <asm/mach-types.h>
37 #if defined(CONFIG_MP) && defined(CONFIG_PPC)
41 #include <asm/sections.h>
43 #include <linux/errno.h>
46 * Pointer to initial global data area
48 * Here we initialize it if needed.
50 #ifdef XTRN_DECLARE_GLOBAL_DATA_PTR
51 #undef XTRN_DECLARE_GLOBAL_DATA_PTR
52 #define XTRN_DECLARE_GLOBAL_DATA_PTR /* empty = allocate here */
53 DECLARE_GLOBAL_DATA_PTR
= (gd_t
*) (CONFIG_SYS_INIT_GD_ADDR
);
55 DECLARE_GLOBAL_DATA_PTR
;
59 * TODO(sjg@chromium.org): IMO this code should be
60 * refactored to a single function, something like:
62 * void led_set_state(enum led_colour_t colour, int on);
64 /************************************************************************
65 * Coloured LED functionality
66 ************************************************************************
67 * May be supplied by boards if desired
69 __weak
void coloured_LED_init(void) {}
70 __weak
void red_led_on(void) {}
71 __weak
void red_led_off(void) {}
72 __weak
void green_led_on(void) {}
73 __weak
void green_led_off(void) {}
74 __weak
void yellow_led_on(void) {}
75 __weak
void yellow_led_off(void) {}
76 __weak
void blue_led_on(void) {}
77 __weak
void blue_led_off(void) {}
80 * Why is gd allocated a register? Prior to reloc it might be better to
81 * just pass it around to each function in this file?
83 * After reloc one could argue that it is hardly used and doesn't need
84 * to be in a register. Or if it is it should perhaps hold pointers to all
85 * global data for all modules, so that post-reloc we can avoid the massive
86 * literal pool we get on ARM. Or perhaps just encourage each module to use
90 #if defined(CONFIG_WATCHDOG) || defined(CONFIG_HW_WATCHDOG)
91 static int init_func_watchdog_init(void)
93 # if defined(CONFIG_HW_WATCHDOG) && \
94 (defined(CONFIG_M68K) || defined(CONFIG_MICROBLAZE) || \
95 defined(CONFIG_SH) || defined(CONFIG_AT91SAM9_WATCHDOG) || \
96 defined(CONFIG_DESIGNWARE_WATCHDOG) || \
97 defined(CONFIG_IMX_WATCHDOG))
99 puts(" Watchdog enabled\n");
106 int init_func_watchdog_reset(void)
112 #endif /* CONFIG_WATCHDOG */
114 __weak
void board_add_ram_info(int use_default
)
116 /* please define platform specific board_add_ram_info() */
119 static int init_baud_rate(void)
121 gd
->baudrate
= getenv_ulong("baudrate", 10, CONFIG_BAUDRATE
);
125 static int display_text_info(void)
127 #if !defined(CONFIG_SANDBOX) && !defined(CONFIG_EFI_APP)
128 ulong bss_start
, bss_end
, text_base
;
130 bss_start
= (ulong
)&__bss_start
;
131 bss_end
= (ulong
)&__bss_end
;
133 #ifdef CONFIG_SYS_TEXT_BASE
134 text_base
= CONFIG_SYS_TEXT_BASE
;
136 text_base
= CONFIG_SYS_MONITOR_BASE
;
139 debug("U-Boot code: %08lX -> %08lX BSS: -> %08lX\n",
140 text_base
, bss_start
, bss_end
);
146 static int announce_dram_init(void)
152 static int show_dram_config(void)
154 unsigned long long size
;
156 #ifdef CONFIG_NR_DRAM_BANKS
159 debug("\nRAM Configuration:\n");
160 for (i
= size
= 0; i
< CONFIG_NR_DRAM_BANKS
; i
++) {
161 size
+= gd
->bd
->bi_dram
[i
].size
;
162 debug("Bank #%d: %llx ", i
,
163 (unsigned long long)(gd
->bd
->bi_dram
[i
].start
));
165 print_size(gd
->bd
->bi_dram
[i
].size
, "\n");
173 print_size(size
, "");
174 board_add_ram_info(0);
180 __weak
int dram_init_banksize(void)
182 #if defined(CONFIG_NR_DRAM_BANKS) && defined(CONFIG_SYS_SDRAM_BASE)
183 gd
->bd
->bi_dram
[0].start
= CONFIG_SYS_SDRAM_BASE
;
184 gd
->bd
->bi_dram
[0].size
= get_effective_memsize();
190 #if defined(CONFIG_SYS_I2C)
191 static int init_func_i2c(void)
194 #ifdef CONFIG_SYS_I2C
197 i2c_init(CONFIG_SYS_I2C_SPEED
, CONFIG_SYS_I2C_SLAVE
);
204 #if defined(CONFIG_HARD_SPI)
205 static int init_func_spi(void)
215 static int zero_global_data(void)
217 memset((void *)gd
, '\0', sizeof(gd_t
));
222 static int setup_mon_len(void)
224 #if defined(__ARM__) || defined(__MICROBLAZE__)
225 gd
->mon_len
= (ulong
)&__bss_end
- (ulong
)_start
;
226 #elif defined(CONFIG_SANDBOX) || defined(CONFIG_EFI_APP)
227 gd
->mon_len
= (ulong
)&_end
- (ulong
)_init
;
228 #elif defined(CONFIG_NIOS2) || defined(CONFIG_XTENSA)
229 gd
->mon_len
= CONFIG_SYS_MONITOR_LEN
;
230 #elif defined(CONFIG_NDS32) || defined(CONFIG_SH)
231 gd
->mon_len
= (ulong
)(&__bss_end
) - (ulong
)(&_start
);
232 #elif defined(CONFIG_SYS_MONITOR_BASE)
233 /* TODO: use (ulong)&__bss_end - (ulong)&__text_start; ? */
234 gd
->mon_len
= (ulong
)&__bss_end
- CONFIG_SYS_MONITOR_BASE
;
239 __weak
int arch_cpu_init(void)
244 __weak
int mach_cpu_init(void)
249 /* Get the top of usable RAM */
250 __weak ulong
board_get_usable_ram_top(ulong total_size
)
252 #ifdef CONFIG_SYS_SDRAM_BASE
254 * Detect whether we have so much RAM that it goes past the end of our
255 * 32-bit address space. If so, clip the usable RAM so it doesn't.
257 if (gd
->ram_top
< CONFIG_SYS_SDRAM_BASE
)
259 * Will wrap back to top of 32-bit space when reservations
267 static int setup_dest_addr(void)
269 debug("Monitor len: %08lX\n", gd
->mon_len
);
271 * Ram is setup, size stored in gd !!
273 debug("Ram size: %08lX\n", (ulong
)gd
->ram_size
);
274 #if defined(CONFIG_SYS_MEM_TOP_HIDE)
276 * Subtract specified amount of memory to hide so that it won't
277 * get "touched" at all by U-Boot. By fixing up gd->ram_size
278 * the Linux kernel should now get passed the now "corrected"
279 * memory size and won't touch it either. This should work
280 * for arch/ppc and arch/powerpc. Only Linux board ports in
281 * arch/powerpc with bootwrapper support, that recalculate the
282 * memory size from the SDRAM controller setup will have to
285 gd
->ram_size
-= CONFIG_SYS_MEM_TOP_HIDE
;
287 #ifdef CONFIG_SYS_SDRAM_BASE
288 gd
->ram_top
= CONFIG_SYS_SDRAM_BASE
;
290 gd
->ram_top
+= get_effective_memsize();
291 gd
->ram_top
= board_get_usable_ram_top(gd
->mon_len
);
292 gd
->relocaddr
= gd
->ram_top
;
293 debug("Ram top: %08lX\n", (ulong
)gd
->ram_top
);
294 #if defined(CONFIG_MP) && (defined(CONFIG_MPC86xx) || defined(CONFIG_E500))
296 * We need to make sure the location we intend to put secondary core
297 * boot code is reserved and not used by any part of u-boot
299 if (gd
->relocaddr
> determine_mp_bootpg(NULL
)) {
300 gd
->relocaddr
= determine_mp_bootpg(NULL
);
301 debug("Reserving MP boot page to %08lx\n", gd
->relocaddr
);
307 #if defined(CONFIG_LOGBUFFER)
308 static int reserve_logbuffer(void)
310 #ifndef CONFIG_ALT_LB_ADDR
311 /* reserve kernel log buffer */
312 gd
->relocaddr
-= LOGBUFF_RESERVE
;
313 debug("Reserving %dk for kernel logbuffer at %08lx\n", LOGBUFF_LEN
,
322 /* reserve protected RAM */
323 static int reserve_pram(void)
327 reg
= getenv_ulong("pram", 10, CONFIG_PRAM
);
328 gd
->relocaddr
-= (reg
<< 10); /* size is in kB */
329 debug("Reserving %ldk for protected RAM at %08lx\n", reg
,
333 #endif /* CONFIG_PRAM */
335 /* Round memory pointer down to next 4 kB limit */
336 static int reserve_round_4k(void)
338 gd
->relocaddr
&= ~(4096 - 1);
343 __weak
int reserve_mmu(void)
345 #if !(defined(CONFIG_SYS_ICACHE_OFF) && defined(CONFIG_SYS_DCACHE_OFF))
346 /* reserve TLB table */
347 gd
->arch
.tlb_size
= PGTABLE_SIZE
;
348 gd
->relocaddr
-= gd
->arch
.tlb_size
;
350 /* round down to next 64 kB limit */
351 gd
->relocaddr
&= ~(0x10000 - 1);
353 gd
->arch
.tlb_addr
= gd
->relocaddr
;
354 debug("TLB table from %08lx to %08lx\n", gd
->arch
.tlb_addr
,
355 gd
->arch
.tlb_addr
+ gd
->arch
.tlb_size
);
357 #ifdef CONFIG_SYS_MEM_RESERVE_SECURE
359 * Record allocated tlb_addr in case gd->tlb_addr to be overwritten
360 * with location within secure ram.
362 gd
->arch
.tlb_allocated
= gd
->arch
.tlb_addr
;
370 static int reserve_video(void)
372 #ifdef CONFIG_DM_VIDEO
376 addr
= gd
->relocaddr
;
377 ret
= video_reserve(&addr
);
380 gd
->relocaddr
= addr
;
381 #elif defined(CONFIG_LCD)
382 # ifdef CONFIG_FB_ADDR
383 gd
->fb_base
= CONFIG_FB_ADDR
;
385 /* reserve memory for LCD display (always full pages) */
386 gd
->relocaddr
= lcd_setmem(gd
->relocaddr
);
387 gd
->fb_base
= gd
->relocaddr
;
388 # endif /* CONFIG_FB_ADDR */
389 #elif defined(CONFIG_VIDEO) && \
390 (!defined(CONFIG_PPC)) && \
391 !defined(CONFIG_ARM) && !defined(CONFIG_X86) && \
392 !defined(CONFIG_M68K)
393 /* reserve memory for video display (always full pages) */
394 gd
->relocaddr
= video_setmem(gd
->relocaddr
);
395 gd
->fb_base
= gd
->relocaddr
;
401 static int reserve_trace(void)
404 gd
->relocaddr
-= CONFIG_TRACE_BUFFER_SIZE
;
405 gd
->trace_buff
= map_sysmem(gd
->relocaddr
, CONFIG_TRACE_BUFFER_SIZE
);
406 debug("Reserving %dk for trace data at: %08lx\n",
407 CONFIG_TRACE_BUFFER_SIZE
>> 10, gd
->relocaddr
);
413 static int reserve_uboot(void)
416 * reserve memory for U-Boot code, data & bss
417 * round down to next 4 kB limit
419 gd
->relocaddr
-= gd
->mon_len
;
420 gd
->relocaddr
&= ~(4096 - 1);
421 #if defined(CONFIG_E500) || defined(CONFIG_MIPS)
422 /* round down to next 64 kB limit so that IVPR stays aligned */
423 gd
->relocaddr
&= ~(65536 - 1);
426 debug("Reserving %ldk for U-Boot at: %08lx\n", gd
->mon_len
>> 10,
429 gd
->start_addr_sp
= gd
->relocaddr
;
434 /* reserve memory for malloc() area */
435 static int reserve_malloc(void)
437 gd
->start_addr_sp
= gd
->start_addr_sp
- TOTAL_MALLOC_LEN
;
438 debug("Reserving %dk for malloc() at: %08lx\n",
439 TOTAL_MALLOC_LEN
>> 10, gd
->start_addr_sp
);
443 /* (permanently) allocate a Board Info struct */
444 static int reserve_board(void)
447 gd
->start_addr_sp
-= sizeof(bd_t
);
448 gd
->bd
= (bd_t
*)map_sysmem(gd
->start_addr_sp
, sizeof(bd_t
));
449 memset(gd
->bd
, '\0', sizeof(bd_t
));
450 debug("Reserving %zu Bytes for Board Info at: %08lx\n",
451 sizeof(bd_t
), gd
->start_addr_sp
);
456 static int setup_machine(void)
458 #ifdef CONFIG_MACH_TYPE
459 gd
->bd
->bi_arch_number
= CONFIG_MACH_TYPE
; /* board id for Linux */
464 static int reserve_global_data(void)
466 gd
->start_addr_sp
-= sizeof(gd_t
);
467 gd
->new_gd
= (gd_t
*)map_sysmem(gd
->start_addr_sp
, sizeof(gd_t
));
468 debug("Reserving %zu Bytes for Global Data at: %08lx\n",
469 sizeof(gd_t
), gd
->start_addr_sp
);
473 static int reserve_fdt(void)
475 #ifndef CONFIG_OF_EMBED
477 * If the device tree is sitting immediately above our image then we
478 * must relocate it. If it is embedded in the data section, then it
479 * will be relocated with other data.
482 gd
->fdt_size
= ALIGN(fdt_totalsize(gd
->fdt_blob
) + 0x1000, 32);
484 gd
->start_addr_sp
-= gd
->fdt_size
;
485 gd
->new_fdt
= map_sysmem(gd
->start_addr_sp
, gd
->fdt_size
);
486 debug("Reserving %lu Bytes for FDT at: %08lx\n",
487 gd
->fdt_size
, gd
->start_addr_sp
);
494 static int reserve_bootstage(void)
496 #ifdef CONFIG_BOOTSTAGE
497 int size
= bootstage_get_size();
499 gd
->start_addr_sp
-= size
;
500 gd
->new_bootstage
= map_sysmem(gd
->start_addr_sp
, size
);
501 debug("Reserving %#x Bytes for bootstage at: %08lx\n", size
,
508 int arch_reserve_stacks(void)
513 static int reserve_stacks(void)
515 /* make stack pointer 16-byte aligned */
516 gd
->start_addr_sp
-= 16;
517 gd
->start_addr_sp
&= ~0xf;
520 * let the architecture-specific code tailor gd->start_addr_sp and
523 return arch_reserve_stacks();
526 static int display_new_sp(void)
528 debug("New Stack Pointer is: %08lx\n", gd
->start_addr_sp
);
533 #if defined(CONFIG_M68K) || defined(CONFIG_MIPS) || defined(CONFIG_PPC) || \
535 static int setup_board_part1(void)
540 * Save local variables to board info struct
542 bd
->bi_memstart
= CONFIG_SYS_SDRAM_BASE
; /* start of memory */
543 bd
->bi_memsize
= gd
->ram_size
; /* size in bytes */
545 #ifdef CONFIG_SYS_SRAM_BASE
546 bd
->bi_sramstart
= CONFIG_SYS_SRAM_BASE
; /* start of SRAM */
547 bd
->bi_sramsize
= CONFIG_SYS_SRAM_SIZE
; /* size of SRAM */
550 #if defined(CONFIG_E500) || defined(CONFIG_MPC86xx)
551 bd
->bi_immr_base
= CONFIG_SYS_IMMR
; /* base of IMMR register */
553 #if defined(CONFIG_M68K)
554 bd
->bi_mbar_base
= CONFIG_SYS_MBAR
; /* base of internal registers */
556 #if defined(CONFIG_MPC83xx)
557 bd
->bi_immrbar
= CONFIG_SYS_IMMR
;
564 #if defined(CONFIG_PPC) || defined(CONFIG_M68K)
565 static int setup_board_part2(void)
569 bd
->bi_intfreq
= gd
->cpu_clk
; /* Internal Freq, in Hz */
570 bd
->bi_busfreq
= gd
->bus_clk
; /* Bus Freq, in Hz */
571 #if defined(CONFIG_CPM2)
572 bd
->bi_cpmfreq
= gd
->arch
.cpm_clk
;
573 bd
->bi_brgfreq
= gd
->arch
.brg_clk
;
574 bd
->bi_sccfreq
= gd
->arch
.scc_clk
;
575 bd
->bi_vco
= gd
->arch
.vco_out
;
576 #endif /* CONFIG_CPM2 */
577 #if defined(CONFIG_M68K) && defined(CONFIG_PCI)
578 bd
->bi_pcifreq
= gd
->pci_clk
;
580 #if defined(CONFIG_EXTRA_CLOCK)
581 bd
->bi_inpfreq
= gd
->arch
.inp_clk
; /* input Freq in Hz */
582 bd
->bi_vcofreq
= gd
->arch
.vco_clk
; /* vco Freq in Hz */
583 bd
->bi_flbfreq
= gd
->arch
.flb_clk
; /* flexbus Freq in Hz */
591 static int init_post(void)
593 post_bootmode_init();
594 post_run(NULL
, POST_ROM
| post_bootmode_get(0));
600 static int reloc_fdt(void)
602 #ifndef CONFIG_OF_EMBED
603 if (gd
->flags
& GD_FLG_SKIP_RELOC
)
606 memcpy(gd
->new_fdt
, gd
->fdt_blob
, gd
->fdt_size
);
607 gd
->fdt_blob
= gd
->new_fdt
;
614 static int reloc_bootstage(void)
616 #ifdef CONFIG_BOOTSTAGE
617 if (gd
->flags
& GD_FLG_SKIP_RELOC
)
619 if (gd
->new_bootstage
) {
620 int size
= bootstage_get_size();
622 debug("Copying bootstage from %p to %p, size %x\n",
623 gd
->bootstage
, gd
->new_bootstage
, size
);
624 memcpy(gd
->new_bootstage
, gd
->bootstage
, size
);
625 gd
->bootstage
= gd
->new_bootstage
;
632 static int setup_reloc(void)
634 if (gd
->flags
& GD_FLG_SKIP_RELOC
) {
635 debug("Skipping relocation due to flag\n");
639 #ifdef CONFIG_SYS_TEXT_BASE
641 gd
->reloc_off
= gd
->relocaddr
- (unsigned long)__image_copy_start
;
642 #elif defined(CONFIG_M68K)
644 * On all ColdFire arch cpu, monitor code starts always
645 * just after the default vector table location, so at 0x400
647 gd
->reloc_off
= gd
->relocaddr
- (CONFIG_SYS_TEXT_BASE
+ 0x400);
649 gd
->reloc_off
= gd
->relocaddr
- CONFIG_SYS_TEXT_BASE
;
652 memcpy(gd
->new_gd
, (char *)gd
, sizeof(gd_t
));
654 debug("Relocation Offset is: %08lx\n", gd
->reloc_off
);
655 debug("Relocating to %08lx, new gd at %08lx, sp at %08lx\n",
656 gd
->relocaddr
, (ulong
)map_to_sysmem(gd
->new_gd
),
662 #ifdef CONFIG_OF_BOARD_FIXUP
663 static int fix_fdt(void)
665 return board_fix_fdt((void *)gd
->fdt_blob
);
669 /* ARM calls relocate_code from its crt0.S */
670 #if !defined(CONFIG_ARM) && !defined(CONFIG_SANDBOX) && \
671 !CONFIG_IS_ENABLED(X86_64)
673 static int jump_to_copy(void)
675 if (gd
->flags
& GD_FLG_SKIP_RELOC
)
678 * x86 is special, but in a nice way. It uses a trampoline which
679 * enables the dcache if possible.
681 * For now, other archs use relocate_code(), which is implemented
682 * similarly for all archs. When we do generic relocation, hopefully
683 * we can make all archs enable the dcache prior to relocation.
685 #if defined(CONFIG_X86) || defined(CONFIG_ARC)
687 * SDRAM and console are now initialised. The final stack can now
688 * be setup in SDRAM. Code execution will continue in Flash, but
689 * with the stack in SDRAM and Global Data in temporary memory
692 arch_setup_gd(gd
->new_gd
);
693 board_init_f_r_trampoline(gd
->start_addr_sp
);
695 relocate_code(gd
->start_addr_sp
, gd
->new_gd
, gd
->relocaddr
);
702 /* Record the board_init_f() bootstage (after arch_cpu_init()) */
703 static int initf_bootstage(void)
705 bool from_spl
= IS_ENABLED(CONFIG_SPL_BOOTSTAGE
) &&
706 IS_ENABLED(CONFIG_BOOTSTAGE_STASH
);
709 ret
= bootstage_init(!from_spl
);
713 const void *stash
= map_sysmem(CONFIG_BOOTSTAGE_STASH_ADDR
,
714 CONFIG_BOOTSTAGE_STASH_SIZE
);
716 ret
= bootstage_unstash(stash
, CONFIG_BOOTSTAGE_STASH_SIZE
);
717 if (ret
&& ret
!= -ENOENT
) {
718 debug("Failed to unstash bootstage: err=%d\n", ret
);
723 bootstage_mark_name(BOOTSTAGE_ID_START_UBOOT_F
, "board_init_f");
728 static int initf_console_record(void)
730 #if defined(CONFIG_CONSOLE_RECORD) && CONFIG_VAL(SYS_MALLOC_F_LEN)
731 return console_record_init();
737 static int initf_dm(void)
739 #if defined(CONFIG_DM) && CONFIG_VAL(SYS_MALLOC_F_LEN)
742 bootstage_start(BOOTSTATE_ID_ACCUM_DM_F
, "dm_f");
743 ret
= dm_init_and_scan(true);
744 bootstage_accum(BOOTSTATE_ID_ACCUM_DM_F
);
748 #ifdef CONFIG_TIMER_EARLY
749 ret
= dm_timer_init();
757 /* Architecture-specific memory reservation */
758 __weak
int reserve_arch(void)
763 __weak
int arch_cpu_init_dm(void)
768 static const init_fnc_t init_sequence_f
[] = {
770 #ifdef CONFIG_OF_CONTROL
777 initf_bootstage
, /* uses its own timer, so does not need DM */
778 initf_console_record
,
779 #if defined(CONFIG_HAVE_FSP)
782 arch_cpu_init
, /* basic arch cpu dependent setup */
783 mach_cpu_init
, /* SoC/machine dependent CPU setup */
786 #if defined(CONFIG_BOARD_EARLY_INIT_F)
789 #if defined(CONFIG_PPC) || defined(CONFIG_SYS_FSL_CLK) || defined(CONFIG_M68K)
790 /* get CPU and bus clocks according to the environment variable */
791 get_clocks
, /* get CPU and bus clocks (etc.) */
793 #if !defined(CONFIG_M68K)
794 timer_init
, /* initialize timer */
796 #if defined(CONFIG_BOARD_POSTCLK_INIT)
799 env_init
, /* initialize environment */
800 init_baud_rate
, /* initialze baudrate settings */
801 serial_init
, /* serial communications setup */
802 console_init_f
, /* stage 1 init of console */
803 display_options
, /* say that we are here */
804 display_text_info
, /* show debugging info if required */
805 #if defined(CONFIG_PPC) || defined(CONFIG_M68K) || defined(CONFIG_SH) || \
809 #if defined(CONFIG_DISPLAY_CPUINFO)
810 print_cpuinfo
, /* display cpu info (and speed) */
812 #if defined(CONFIG_DTB_RESELECT)
815 #if defined(CONFIG_DISPLAY_BOARDINFO)
818 INIT_FUNC_WATCHDOG_INIT
819 #if defined(CONFIG_MISC_INIT_F)
822 INIT_FUNC_WATCHDOG_RESET
823 #if defined(CONFIG_SYS_I2C)
826 #if defined(CONFIG_HARD_SPI)
830 dram_init
, /* configure available RAM banks */
834 INIT_FUNC_WATCHDOG_RESET
835 #if defined(CONFIG_SYS_DRAM_TEST)
837 #endif /* CONFIG_SYS_DRAM_TEST */
838 INIT_FUNC_WATCHDOG_RESET
843 INIT_FUNC_WATCHDOG_RESET
845 * Now that we have DRAM mapped and working, we can
846 * relocate the code and continue running from DRAM.
848 * Reserve memory at end of RAM for (top down in that order):
849 * - area that won't get touched by U-Boot and Linux (optional)
850 * - kernel log buffer
854 * - board info struct
857 #if defined(CONFIG_LOGBUFFER)
880 #if defined(CONFIG_M68K) || defined(CONFIG_MIPS) || defined(CONFIG_PPC) || \
884 #if defined(CONFIG_PPC) || defined(CONFIG_M68K)
885 INIT_FUNC_WATCHDOG_RESET
889 #ifdef CONFIG_OF_BOARD_FIXUP
892 INIT_FUNC_WATCHDOG_RESET
896 #if defined(CONFIG_X86) || defined(CONFIG_ARC)
901 #if defined(CONFIG_XTENSA)
904 #if !defined(CONFIG_ARM) && !defined(CONFIG_SANDBOX) && \
905 !CONFIG_IS_ENABLED(X86_64)
911 void board_init_f(ulong boot_flags
)
913 #ifdef CONFIG_SYS_GENERIC_GLOBAL_DATA
915 * For some architectures, global data is initialized and used before
916 * calling this function. The data should be preserved. For others,
917 * CONFIG_SYS_GENERIC_GLOBAL_DATA should be defined and use the stack
918 * here to host global data until relocation.
925 * Clear global data before it is accessed at debug print
926 * in initcall_run_list. Otherwise the debug print probably
927 * get the wrong value of gd->have_console.
932 gd
->flags
= boot_flags
;
933 gd
->have_console
= 0;
935 if (initcall_run_list(init_sequence_f
))
938 #if !defined(CONFIG_ARM) && !defined(CONFIG_SANDBOX) && \
939 !defined(CONFIG_EFI_APP) && !CONFIG_IS_ENABLED(X86_64)
940 /* NOTREACHED - jump_to_copy() does not return */
945 #if defined(CONFIG_X86) || defined(CONFIG_ARC)
947 * For now this code is only used on x86.
949 * init_sequence_f_r is the list of init functions which are run when
950 * U-Boot is executing from Flash with a semi-limited 'C' environment.
951 * The following limitations must be considered when implementing an
953 * - 'static' variables are read-only
954 * - Global Data (gd->xxx) is read/write
956 * The '_f_r' sequence must, as a minimum, copy U-Boot to RAM (if
957 * supported). It _should_, if possible, copy global data to RAM and
958 * initialise the CPU caches (to speed up the relocation process)
960 * NOTE: At present only x86 uses this route, but it is intended that
961 * all archs will move to this when generic relocation is implemented.
963 static const init_fnc_t init_sequence_f_r
[] = {
964 #if !CONFIG_IS_ENABLED(X86_64)
971 void board_init_f_r(void)
973 if (initcall_run_list(init_sequence_f_r
))
977 * The pre-relocation drivers may be using memory that has now gone
978 * away. Mark serial as unavailable - this will fall back to the debug
981 gd
->flags
&= ~GD_FLG_SERIAL_READY
;
984 * U-Boot has been copied into SDRAM, the BSS has been cleared etc.
985 * Transfer execution from Flash to RAM by calculating the address
986 * of the in-RAM copy of board_init_r() and calling it
988 (board_init_r
+ gd
->reloc_off
)((gd_t
*)gd
, gd
->relocaddr
);
990 /* NOTREACHED - board_init_r() does not return */
993 #endif /* CONFIG_X86 */