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>
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* Marius Groeger <mgroeger@sysgo.de>
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* SPDX-License-Identifier: GPL-2.0+
14
#include <linux/compiler.h>
16
#include <environment.h>
19
#if defined(CONFIG_CMD_IDE)
26
/* TODO: Can we move these into arch/ headers? */
42
#include <asm/errno.h>
47
#include <asm/sections.h>
49
#include <asm/init_helpers.h>
50
#include <asm/relocate.h>
53
#include <asm/state.h>
55
#include <linux/compiler.h>
58
* Pointer to initial global data area
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* Here we initialize it if needed.
62
#ifdef XTRN_DECLARE_GLOBAL_DATA_PTR
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#undef XTRN_DECLARE_GLOBAL_DATA_PTR
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#define XTRN_DECLARE_GLOBAL_DATA_PTR /* empty = allocate here */
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DECLARE_GLOBAL_DATA_PTR = (gd_t *) (CONFIG_SYS_INIT_GD_ADDR);
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DECLARE_GLOBAL_DATA_PTR;
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* sjg: IMO this code should be
72
* refactored to a single function, something like:
74
* void led_set_state(enum led_colour_t colour, int on);
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/************************************************************************
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* Coloured LED functionality
78
************************************************************************
79
* May be supplied by boards if desired
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inline void __coloured_LED_init(void) {}
82
void coloured_LED_init(void)
83
__attribute__((weak, alias("__coloured_LED_init")));
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inline void __red_led_on(void) {}
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void red_led_on(void) __attribute__((weak, alias("__red_led_on")));
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inline void __red_led_off(void) {}
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void red_led_off(void) __attribute__((weak, alias("__red_led_off")));
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inline void __green_led_on(void) {}
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void green_led_on(void) __attribute__((weak, alias("__green_led_on")));
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inline void __green_led_off(void) {}
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void green_led_off(void) __attribute__((weak, alias("__green_led_off")));
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inline void __yellow_led_on(void) {}
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void yellow_led_on(void) __attribute__((weak, alias("__yellow_led_on")));
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inline void __yellow_led_off(void) {}
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void yellow_led_off(void) __attribute__((weak, alias("__yellow_led_off")));
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inline void __blue_led_on(void) {}
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void blue_led_on(void) __attribute__((weak, alias("__blue_led_on")));
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inline void __blue_led_off(void) {}
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void blue_led_off(void) __attribute__((weak, alias("__blue_led_off")));
102
* Why is gd allocated a register? Prior to reloc it might be better to
103
* just pass it around to each function in this file?
105
* After reloc one could argue that it is hardly used and doesn't need
106
* to be in a register. Or if it is it should perhaps hold pointers to all
107
* global data for all modules, so that post-reloc we can avoid the massive
108
* literal pool we get on ARM. Or perhaps just encourage each module to use
113
* Could the CONFIG_SPL_BUILD infection become a flag in gd?
116
#if defined(CONFIG_WATCHDOG)
117
static int init_func_watchdog_init(void)
119
puts(" Watchdog enabled\n");
125
int init_func_watchdog_reset(void)
131
#endif /* CONFIG_WATCHDOG */
133
void __board_add_ram_info(int use_default)
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/* please define platform specific board_add_ram_info() */
138
void board_add_ram_info(int)
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__attribute__ ((weak, alias("__board_add_ram_info")));
141
static int init_baud_rate(void)
143
gd->baudrate = getenv_ulong("baudrate", 10, CONFIG_BAUDRATE);
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static int display_text_info(void)
149
#ifndef CONFIG_SANDBOX
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ulong bss_start, bss_end;
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bss_start = (ulong)&__bss_start;
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bss_end = (ulong)&__bss_end;
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debug("U-Boot code: %08X -> %08lX BSS: -> %08lX\n",
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CONFIG_SYS_TEXT_BASE, bss_start, bss_end);
159
#ifdef CONFIG_MODEM_SUPPORT
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debug("Modem Support enabled\n");
162
#ifdef CONFIG_USE_IRQ
163
debug("IRQ Stack: %08lx\n", IRQ_STACK_START);
164
debug("FIQ Stack: %08lx\n", FIQ_STACK_START);
170
static int announce_dram_init(void)
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#if defined(CONFIG_MIPS) || defined(CONFIG_PPC)
177
static int init_func_ram(void)
179
#ifdef CONFIG_BOARD_TYPES
180
int board_type = gd->board_type;
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int board_type = 0; /* use dummy arg */
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gd->ram_size = initdram(board_type);
187
if (gd->ram_size > 0)
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puts("*** failed ***\n");
195
static int show_dram_config(void)
197
unsigned long long size;
199
#ifdef CONFIG_NR_DRAM_BANKS
202
debug("\nRAM Configuration:\n");
203
for (i = size = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
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size += gd->bd->bi_dram[i].size;
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debug("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
207
print_size(gd->bd->bi_dram[i].size, "\n");
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print_size(size, "");
216
board_add_ram_info(0);
222
void __dram_init_banksize(void)
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#if defined(CONFIG_NR_DRAM_BANKS) && defined(CONFIG_SYS_SDRAM_BASE)
225
gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE;
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gd->bd->bi_dram[0].size = get_effective_memsize();
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void dram_init_banksize(void)
231
__attribute__((weak, alias("__dram_init_banksize")));
233
#if defined(CONFIG_HARD_I2C) || defined(CONFIG_SYS_I2C)
234
static int init_func_i2c(void)
237
#ifdef CONFIG_SYS_I2C
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i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
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#if defined(CONFIG_HARD_SPI)
248
static int init_func_spi(void)
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static int zero_global_data(void)
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memset((void *)gd, '\0', sizeof(gd_t));
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static int setup_mon_len(void)
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gd->mon_len = (ulong)&__bss_end - (ulong)_start;
269
#elif defined(CONFIG_SANDBOX)
270
gd->mon_len = (ulong)&_end - (ulong)_init;
272
/* TODO: use (ulong)&__bss_end - (ulong)&__text_start; ? */
273
gd->mon_len = (ulong)&__bss_end - CONFIG_SYS_MONITOR_BASE;
278
__weak int arch_cpu_init(void)
283
#ifdef CONFIG_OF_HOSTFILE
285
static int read_fdt_from_file(void)
287
struct sandbox_state *state = state_get_current();
288
const char *fname = state->fdt_fname;
294
blob = map_sysmem(CONFIG_SYS_FDT_LOAD_ADDR, 0);
295
if (!state->fdt_fname) {
296
err = fdt_create_empty_tree(blob, 256);
299
printf("Unable to create empty FDT: %s\n", fdt_strerror(err));
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size = os_get_filesize(fname);
305
printf("Failed to file FDT file '%s'\n", fname);
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fd = os_open(fname, OS_O_RDONLY);
310
printf("Failed to open FDT file '%s'\n", fname);
313
if (os_read(fd, blob, size) != size) {
326
#ifdef CONFIG_SANDBOX
327
static int setup_ram_buf(void)
329
struct sandbox_state *state = state_get_current();
331
gd->arch.ram_buf = state->ram_buf;
332
gd->ram_size = state->ram_size;
338
static int setup_fdt(void)
340
#ifdef CONFIG_OF_EMBED
341
/* Get a pointer to the FDT */
342
gd->fdt_blob = __dtb_dt_begin;
343
#elif defined CONFIG_OF_SEPARATE
344
/* FDT is at end of image */
345
gd->fdt_blob = (ulong *)&_end;
346
#elif defined(CONFIG_OF_HOSTFILE)
347
if (read_fdt_from_file()) {
348
puts("Failed to read control FDT\n");
352
/* Allow the early environment to override the fdt address */
353
gd->fdt_blob = (void *)getenv_ulong("fdtcontroladdr", 16,
354
(uintptr_t)gd->fdt_blob);
358
/* Get the top of usable RAM */
359
__weak ulong board_get_usable_ram_top(ulong total_size)
364
static int setup_dest_addr(void)
366
debug("Monitor len: %08lX\n", gd->mon_len);
368
* Ram is setup, size stored in gd !!
370
debug("Ram size: %08lX\n", (ulong)gd->ram_size);
371
#if defined(CONFIG_SYS_MEM_TOP_HIDE)
373
* Subtract specified amount of memory to hide so that it won't
374
* get "touched" at all by U-Boot. By fixing up gd->ram_size
375
* the Linux kernel should now get passed the now "corrected"
376
* memory size and won't touch it either. This should work
377
* for arch/ppc and arch/powerpc. Only Linux board ports in
378
* arch/powerpc with bootwrapper support, that recalculate the
379
* memory size from the SDRAM controller setup will have to
382
gd->ram_size -= CONFIG_SYS_MEM_TOP_HIDE;
384
#ifdef CONFIG_SYS_SDRAM_BASE
385
gd->ram_top = CONFIG_SYS_SDRAM_BASE;
387
gd->ram_top += get_effective_memsize();
388
gd->ram_top = board_get_usable_ram_top(gd->mon_len);
389
gd->relocaddr = gd->ram_top;
390
debug("Ram top: %08lX\n", (ulong)gd->ram_top);
391
#if defined(CONFIG_MP) && (defined(CONFIG_MPC86xx) || defined(CONFIG_E500))
393
* We need to make sure the location we intend to put secondary core
394
* boot code is reserved and not used by any part of u-boot
396
if (gd->relocaddr > determine_mp_bootpg(NULL)) {
397
gd->relocaddr = determine_mp_bootpg(NULL);
398
debug("Reserving MP boot page to %08lx\n", gd->relocaddr);
404
#if defined(CONFIG_LOGBUFFER) && !defined(CONFIG_ALT_LB_ADDR)
405
static int reserve_logbuffer(void)
407
/* reserve kernel log buffer */
408
gd->relocaddr -= LOGBUFF_RESERVE;
409
debug("Reserving %dk for kernel logbuffer at %08lx\n", LOGBUFF_LEN,
416
/* reserve protected RAM */
417
static int reserve_pram(void)
421
reg = getenv_ulong("pram", 10, CONFIG_PRAM);
422
gd->relocaddr -= (reg << 10); /* size is in kB */
423
debug("Reserving %ldk for protected RAM at %08lx\n", reg,
427
#endif /* CONFIG_PRAM */
429
/* Round memory pointer down to next 4 kB limit */
430
static int reserve_round_4k(void)
432
gd->relocaddr &= ~(4096 - 1);
436
#if !(defined(CONFIG_SYS_ICACHE_OFF) && defined(CONFIG_SYS_DCACHE_OFF)) && \
438
static int reserve_mmu(void)
440
/* reserve TLB table */
441
gd->arch.tlb_size = PGTABLE_SIZE;
442
gd->relocaddr -= gd->arch.tlb_size;
444
/* round down to next 64 kB limit */
445
gd->relocaddr &= ~(0x10000 - 1);
447
gd->arch.tlb_addr = gd->relocaddr;
448
debug("TLB table from %08lx to %08lx\n", gd->arch.tlb_addr,
449
gd->arch.tlb_addr + gd->arch.tlb_size);
455
static int reserve_lcd(void)
457
#ifdef CONFIG_FB_ADDR
458
gd->fb_base = CONFIG_FB_ADDR;
460
/* reserve memory for LCD display (always full pages) */
461
gd->relocaddr = lcd_setmem(gd->relocaddr);
462
gd->fb_base = gd->relocaddr;
463
#endif /* CONFIG_FB_ADDR */
466
#endif /* CONFIG_LCD */
468
static int reserve_trace(void)
471
gd->relocaddr -= CONFIG_TRACE_BUFFER_SIZE;
472
gd->trace_buff = map_sysmem(gd->relocaddr, CONFIG_TRACE_BUFFER_SIZE);
473
debug("Reserving %dk for trace data at: %08lx\n",
474
CONFIG_TRACE_BUFFER_SIZE >> 10, gd->relocaddr);
480
#if defined(CONFIG_VIDEO) && (!defined(CONFIG_PPC) || defined(CONFIG_8xx)) \
481
&& !defined(CONFIG_ARM) && !defined(CONFIG_X86)
482
static int reserve_video(void)
484
/* reserve memory for video display (always full pages) */
485
gd->relocaddr = video_setmem(gd->relocaddr);
486
gd->fb_base = gd->relocaddr;
492
static int reserve_uboot(void)
495
* reserve memory for U-Boot code, data & bss
496
* round down to next 4 kB limit
498
gd->relocaddr -= gd->mon_len;
499
gd->relocaddr &= ~(4096 - 1);
501
/* round down to next 64 kB limit so that IVPR stays aligned */
502
gd->relocaddr &= ~(65536 - 1);
505
debug("Reserving %ldk for U-Boot at: %08lx\n", gd->mon_len >> 10,
508
gd->start_addr_sp = gd->relocaddr;
513
#ifndef CONFIG_SPL_BUILD
514
/* reserve memory for malloc() area */
515
static int reserve_malloc(void)
517
gd->start_addr_sp = gd->start_addr_sp - TOTAL_MALLOC_LEN;
518
debug("Reserving %dk for malloc() at: %08lx\n",
519
TOTAL_MALLOC_LEN >> 10, gd->start_addr_sp);
523
/* (permanently) allocate a Board Info struct */
524
static int reserve_board(void)
526
gd->start_addr_sp -= sizeof(bd_t);
527
gd->bd = (bd_t *)map_sysmem(gd->start_addr_sp, sizeof(bd_t));
528
memset(gd->bd, '\0', sizeof(bd_t));
529
debug("Reserving %zu Bytes for Board Info at: %08lx\n",
530
sizeof(bd_t), gd->start_addr_sp);
535
static int setup_machine(void)
537
#ifdef CONFIG_MACH_TYPE
538
gd->bd->bi_arch_number = CONFIG_MACH_TYPE; /* board id for Linux */
543
static int reserve_global_data(void)
545
gd->start_addr_sp -= sizeof(gd_t);
546
gd->new_gd = (gd_t *)map_sysmem(gd->start_addr_sp, sizeof(gd_t));
547
debug("Reserving %zu Bytes for Global Data at: %08lx\n",
548
sizeof(gd_t), gd->start_addr_sp);
552
static int reserve_fdt(void)
555
* If the device tree is sitting immediate above our image then we
556
* must relocate it. If it is embedded in the data section, then it
557
* will be relocated with other data.
560
gd->fdt_size = ALIGN(fdt_totalsize(gd->fdt_blob) + 0x1000, 32);
562
gd->start_addr_sp -= gd->fdt_size;
563
gd->new_fdt = map_sysmem(gd->start_addr_sp, gd->fdt_size);
564
debug("Reserving %lu Bytes for FDT at: %08lx\n",
565
gd->fdt_size, gd->start_addr_sp);
571
static int reserve_stacks(void)
573
#ifdef CONFIG_SPL_BUILD
575
gd->start_addr_sp -= 128; /* leave 32 words for abort-stack */
576
gd->irq_sp = gd->start_addr_sp;
583
/* setup stack pointer for exceptions */
584
gd->start_addr_sp -= 16;
585
gd->start_addr_sp &= ~0xf;
586
gd->irq_sp = gd->start_addr_sp;
589
* Handle architecture-specific things here
590
* TODO(sjg@chromium.org): Perhaps create arch_reserve_stack()
591
* to handle this and put in arch/xxx/lib/stack.c
593
# if defined(CONFIG_ARM) && !defined(CONFIG_ARM64)
594
# ifdef CONFIG_USE_IRQ
595
gd->start_addr_sp -= (CONFIG_STACKSIZE_IRQ + CONFIG_STACKSIZE_FIQ);
596
debug("Reserving %zu Bytes for IRQ stack at: %08lx\n",
597
CONFIG_STACKSIZE_IRQ + CONFIG_STACKSIZE_FIQ, gd->start_addr_sp);
599
/* 8-byte alignment for ARM ABI compliance */
600
gd->start_addr_sp &= ~0x07;
602
/* leave 3 words for abort-stack, plus 1 for alignment */
603
gd->start_addr_sp -= 16;
604
# elif defined(CONFIG_PPC)
605
/* Clear initial stack frame */
606
s = (ulong *) gd->start_addr_sp;
607
*s = 0; /* Terminate back chain */
608
*++s = 0; /* NULL return address */
609
# endif /* Architecture specific code */
615
static int display_new_sp(void)
617
debug("New Stack Pointer is: %08lx\n", gd->start_addr_sp);
623
static int setup_board_part1(void)
628
* Save local variables to board info struct
631
bd->bi_memstart = CONFIG_SYS_SDRAM_BASE; /* start of memory */
632
bd->bi_memsize = gd->ram_size; /* size in bytes */
634
#ifdef CONFIG_SYS_SRAM_BASE
635
bd->bi_sramstart = CONFIG_SYS_SRAM_BASE; /* start of SRAM */
636
bd->bi_sramsize = CONFIG_SYS_SRAM_SIZE; /* size of SRAM */
639
#if defined(CONFIG_8xx) || defined(CONFIG_MPC8260) || defined(CONFIG_5xx) || \
640
defined(CONFIG_E500) || defined(CONFIG_MPC86xx)
641
bd->bi_immr_base = CONFIG_SYS_IMMR; /* base of IMMR register */
643
#if defined(CONFIG_MPC5xxx)
644
bd->bi_mbar_base = CONFIG_SYS_MBAR; /* base of internal registers */
646
#if defined(CONFIG_MPC83xx)
647
bd->bi_immrbar = CONFIG_SYS_IMMR;
653
static int setup_board_part2(void)
657
bd->bi_intfreq = gd->cpu_clk; /* Internal Freq, in Hz */
658
bd->bi_busfreq = gd->bus_clk; /* Bus Freq, in Hz */
659
#if defined(CONFIG_CPM2)
660
bd->bi_cpmfreq = gd->arch.cpm_clk;
661
bd->bi_brgfreq = gd->arch.brg_clk;
662
bd->bi_sccfreq = gd->arch.scc_clk;
663
bd->bi_vco = gd->arch.vco_out;
664
#endif /* CONFIG_CPM2 */
665
#if defined(CONFIG_MPC512X)
666
bd->bi_ipsfreq = gd->arch.ips_clk;
667
#endif /* CONFIG_MPC512X */
668
#if defined(CONFIG_MPC5xxx)
669
bd->bi_ipbfreq = gd->arch.ipb_clk;
670
bd->bi_pcifreq = gd->pci_clk;
671
#endif /* CONFIG_MPC5xxx */
677
#ifdef CONFIG_SYS_EXTBDINFO
678
static int setup_board_extra(void)
682
strncpy((char *) bd->bi_s_version, "1.2", sizeof(bd->bi_s_version));
683
strncpy((char *) bd->bi_r_version, U_BOOT_VERSION,
684
sizeof(bd->bi_r_version));
686
bd->bi_procfreq = gd->cpu_clk; /* Processor Speed, In Hz */
687
bd->bi_plb_busfreq = gd->bus_clk;
688
#if defined(CONFIG_405GP) || defined(CONFIG_405EP) || \
689
defined(CONFIG_440EP) || defined(CONFIG_440GR) || \
690
defined(CONFIG_440EPX) || defined(CONFIG_440GRX)
691
bd->bi_pci_busfreq = get_PCI_freq();
692
bd->bi_opbfreq = get_OPB_freq();
693
#elif defined(CONFIG_XILINX_405)
694
bd->bi_pci_busfreq = get_PCI_freq();
702
static int init_post(void)
704
post_bootmode_init();
705
post_run(NULL, POST_ROM | post_bootmode_get(0));
711
static int setup_dram_config(void)
713
/* Ram is board specific, so move it to board code ... */
714
dram_init_banksize();
719
static int reloc_fdt(void)
722
memcpy(gd->new_fdt, gd->fdt_blob, gd->fdt_size);
723
gd->fdt_blob = gd->new_fdt;
729
static int setup_reloc(void)
731
gd->reloc_off = gd->relocaddr - CONFIG_SYS_TEXT_BASE;
732
memcpy(gd->new_gd, (char *)gd, sizeof(gd_t));
734
debug("Relocation Offset is: %08lx\n", gd->reloc_off);
735
debug("Relocating to %08lx, new gd at %08lx, sp at %08lx\n",
736
gd->relocaddr, (ulong)map_to_sysmem(gd->new_gd),
742
/* ARM calls relocate_code from its crt0.S */
743
#if !defined(CONFIG_ARM) && !defined(CONFIG_SANDBOX)
745
static int jump_to_copy(void)
748
* x86 is special, but in a nice way. It uses a trampoline which
749
* enables the dcache if possible.
751
* For now, other archs use relocate_code(), which is implemented
752
* similarly for all archs. When we do generic relocation, hopefully
753
* we can make all archs enable the dcache prior to relocation.
757
* SDRAM and console are now initialised. The final stack can now
758
* be setup in SDRAM. Code execution will continue in Flash, but
759
* with the stack in SDRAM and Global Data in temporary memory
762
board_init_f_r_trampoline(gd->start_addr_sp);
764
relocate_code(gd->start_addr_sp, gd->new_gd, gd->relocaddr);
771
/* Record the board_init_f() bootstage (after arch_cpu_init()) */
772
static int mark_bootstage(void)
774
bootstage_mark_name(BOOTSTAGE_ID_START_UBOOT_F, "board_init_f");
779
static init_fnc_t init_sequence_f[] = {
780
#ifdef CONFIG_SANDBOX
786
#if defined(CONFIG_MPC85xx) || defined(CONFIG_MPC86xx)
787
/* TODO: can this go into arch_cpu_init()? */
790
arch_cpu_init, /* basic arch cpu dependent setup */
792
cpu_init_f, /* TODO(sjg@chromium.org): remove */
793
# ifdef CONFIG_OF_CONTROL
794
find_fdt, /* TODO(sjg@chromium.org): remove */
798
#ifdef CONFIG_OF_CONTROL
801
#if defined(CONFIG_BOARD_EARLY_INIT_F)
804
/* TODO: can any of this go into arch_cpu_init()? */
805
#if defined(CONFIG_PPC) && !defined(CONFIG_8xx_CPUCLK_DEFAULT)
806
get_clocks, /* get CPU and bus clocks (etc.) */
807
#if defined(CONFIG_TQM8xxL) && !defined(CONFIG_TQM866M) \
808
&& !defined(CONFIG_TQM885D)
809
adjust_sdram_tbs_8xx,
811
/* TODO: can we rename this to timer_init()? */
814
#if defined(CONFIG_ARM) || defined(CONFIG_MIPS)
815
timer_init, /* initialize timer */
817
#ifdef CONFIG_SYS_ALLOC_DPRAM
818
#if !defined(CONFIG_CPM2)
822
#if defined(CONFIG_BOARD_POSTCLK_INIT)
825
#ifdef CONFIG_FSL_ESDHC
828
env_init, /* initialize environment */
829
#if defined(CONFIG_8xx_CPUCLK_DEFAULT)
830
/* get CPU and bus clocks according to the environment variable */
832
/* adjust sdram refresh rate according to the new clock */
836
init_baud_rate, /* initialze baudrate settings */
837
serial_init, /* serial communications setup */
838
console_init_f, /* stage 1 init of console */
839
#ifdef CONFIG_SANDBOX
840
sandbox_early_getopt_check,
842
#ifdef CONFIG_OF_CONTROL
845
display_options, /* say that we are here */
846
display_text_info, /* show debugging info if required */
847
#if defined(CONFIG_MPC8260)
850
#endif /* CONFIG_MPC8260 */
851
#if defined(CONFIG_MPC83xx)
857
print_cpuinfo, /* display cpu info (and speed) */
858
#if defined(CONFIG_MPC5xxx)
860
#endif /* CONFIG_MPC5xxx */
861
#if defined(CONFIG_DISPLAY_BOARDINFO)
862
checkboard, /* display board info */
864
INIT_FUNC_WATCHDOG_INIT
865
#if defined(CONFIG_MISC_INIT_F)
868
INIT_FUNC_WATCHDOG_RESET
869
#if defined(CONFIG_HARD_I2C) || defined(CONFIG_SYS_I2C)
872
#if defined(CONFIG_HARD_SPI)
876
dram_init_f, /* configure available RAM banks */
877
calculate_relocation_address,
880
/* TODO: unify all these dram functions? */
882
dram_init, /* configure available RAM banks */
884
#if defined(CONFIG_MIPS) || defined(CONFIG_PPC)
890
INIT_FUNC_WATCHDOG_RESET
891
#if defined(CONFIG_SYS_DRAM_TEST)
893
#endif /* CONFIG_SYS_DRAM_TEST */
894
INIT_FUNC_WATCHDOG_RESET
899
INIT_FUNC_WATCHDOG_RESET
901
* Now that we have DRAM mapped and working, we can
902
* relocate the code and continue running from DRAM.
904
* Reserve memory at end of RAM for (top down in that order):
905
* - area that won't get touched by U-Boot and Linux (optional)
906
* - kernel log buffer
910
* - board info struct
913
#if defined(CONFIG_LOGBUFFER) && !defined(CONFIG_ALT_LB_ADDR)
920
#if !(defined(CONFIG_SYS_ICACHE_OFF) && defined(CONFIG_SYS_DCACHE_OFF)) && \
928
/* TODO: Why the dependency on CONFIG_8xx? */
929
#if defined(CONFIG_VIDEO) && (!defined(CONFIG_PPC) || defined(CONFIG_8xx)) \
930
&& !defined(CONFIG_ARM) && !defined(CONFIG_X86)
934
#ifndef CONFIG_SPL_BUILD
946
INIT_FUNC_WATCHDOG_RESET
950
#ifdef CONFIG_SYS_EXTBDINFO
953
INIT_FUNC_WATCHDOG_RESET
956
#if !defined(CONFIG_ARM) && !defined(CONFIG_SANDBOX)
962
void board_init_f(ulong boot_flags)
964
#ifdef CONFIG_SYS_GENERIC_GLOBAL_DATA
966
* For some archtectures, global data is initialized and used before
967
* calling this function. The data should be preserved. For others,
968
* CONFIG_SYS_GENERIC_GLOBAL_DATA should be defined and use the stack
969
* here to host global data until relocation.
976
* Clear global data before it is accessed at debug print
977
* in initcall_run_list. Otherwise the debug print probably
978
* get the wrong vaule of gd->have_console.
983
gd->flags = boot_flags;
984
gd->have_console = 0;
986
if (initcall_run_list(init_sequence_f))
989
#if !defined(CONFIG_ARM) && !defined(CONFIG_SANDBOX)
990
/* NOTREACHED - jump_to_copy() does not return */
997
* For now this code is only used on x86.
999
* init_sequence_f_r is the list of init functions which are run when
1000
* U-Boot is executing from Flash with a semi-limited 'C' environment.
1001
* The following limitations must be considered when implementing an
1003
* - 'static' variables are read-only
1004
* - Global Data (gd->xxx) is read/write
1006
* The '_f_r' sequence must, as a minimum, copy U-Boot to RAM (if
1007
* supported). It _should_, if possible, copy global data to RAM and
1008
* initialise the CPU caches (to speed up the relocation process)
1010
* NOTE: At present only x86 uses this route, but it is intended that
1011
* all archs will move to this when generic relocation is implemented.
1013
static init_fnc_t init_sequence_f_r[] = {
1017
do_elf_reloc_fixups,
1022
void board_init_f_r(void)
1024
if (initcall_run_list(init_sequence_f_r))
1028
* U-Boot has been copied into SDRAM, the BSS has been cleared etc.
1029
* Transfer execution from Flash to RAM by calculating the address
1030
* of the in-RAM copy of board_init_r() and calling it
1032
(board_init_r + gd->reloc_off)(gd, gd->relocaddr);
1034
/* NOTREACHED - board_init_r() does not return */
1037
#endif /* CONFIG_X86 */