// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright (c) 2011 The Chromium OS Authors.
 * (C) Copyright 2002-2006
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * (C) Copyright 2002
 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
 * Marius Groeger <mgroeger@sysgo.de>
 */

#include <common.h>
#include <bloblist.h>
#include <bootstage.h>
#include <clock_legacy.h>
#include <console.h>
#include <cpu.h>
#include <cpu_func.h>
#include <dm.h>
#include <env.h>
#include <env_internal.h>
#include <fdtdec.h>
#include <fs.h>
#include <hang.h>
#include <i2c.h>
#include <init.h>
#include <initcall.h>
#include <lcd.h>
#include <log.h>
#include <malloc.h>
#include <mapmem.h>
#include <os.h>
#include <post.h>
#include <relocate.h>
#include <serial.h>
#ifdef CONFIG_SPL
#include <spl.h>
#endif
#include <status_led.h>
#include <sysreset.h>
#include <timer.h>
#include <trace.h>
#include <video.h>
#include <watchdog.h>
#include <asm/cache.h>
#ifdef CONFIG_MACH_TYPE
#include <asm/mach-types.h>
#endif
#if defined(CONFIG_MP) && defined(CONFIG_PPC)
#include <asm/mp.h>
#endif
#include <asm/global_data.h>
#include <asm/io.h>
#include <asm/sections.h>
#include <dm/root.h>
#include <linux/errno.h>

/*
 * Pointer to initial global data area
 *
 * Here we initialize it if needed.
 */
#ifdef XTRN_DECLARE_GLOBAL_DATA_PTR
#undef  XTRN_DECLARE_GLOBAL_DATA_PTR
#define XTRN_DECLARE_GLOBAL_DATA_PTR    /* empty = allocate here */
DECLARE_GLOBAL_DATA_PTR = (gd_t *)(CONFIG_SYS_INIT_GD_ADDR);
#else
DECLARE_GLOBAL_DATA_PTR;
#endif

/*
 * TODO(sjg@chromium.org): IMO this code should be
 * refactored to a single function, something like:
 *
 * void led_set_state(enum led_colour_t colour, int on);
 */
/************************************************************************
 * Coloured LED functionality
 ************************************************************************
 * May be supplied by boards if desired
 */
__weak void coloured_LED_init(void) {}
__weak void red_led_on(void) {}
__weak void red_led_off(void) {}
__weak void green_led_on(void) {}
__weak void green_led_off(void) {}
__weak void yellow_led_on(void) {}
__weak void yellow_led_off(void) {}
__weak void blue_led_on(void) {}
__weak void blue_led_off(void) {}

/*
 * Why is gd allocated a register? Prior to reloc it might be better to
 * just pass it around to each function in this file?
 *
 * After reloc one could argue that it is hardly used and doesn't need
 * to be in a register. Or if it is it should perhaps hold pointers to all
 * global data for all modules, so that post-reloc we can avoid the massive
 * literal pool we get on ARM. Or perhaps just encourage each module to use
 * a structure...
 */

#if defined(CONFIG_WATCHDOG) || defined(CONFIG_HW_WATCHDOG)
static int init_func_watchdog_init(void)
{
# if defined(CONFIG_HW_WATCHDOG) && \
        (defined(CONFIG_M68K) || defined(CONFIG_MICROBLAZE) || \
        defined(CONFIG_SH) || \
        defined(CONFIG_DESIGNWARE_WATCHDOG) || \
        defined(CONFIG_IMX_WATCHDOG))
        hw_watchdog_init();
        puts("       Watchdog enabled\n");
# endif
        WATCHDOG_RESET();

        return 0;
}

int init_func_watchdog_reset(void)
{
        WATCHDOG_RESET();

        return 0;
}
#endif /* CONFIG_WATCHDOG */

__weak void board_add_ram_info(int use_default)
{
        /* please define platform specific board_add_ram_info() */
}

static int init_baud_rate(void)
{
        gd->baudrate = env_get_ulong("baudrate", 10, CONFIG_BAUDRATE);
        return 0;
}

static int display_text_info(void)
{
#if !defined(CONFIG_SANDBOX) && !defined(CONFIG_EFI_APP)
        ulong bss_start, bss_end, text_base;

        bss_start = (ulong)&__bss_start;
        bss_end = (ulong)&__bss_end;

#ifdef CONFIG_SYS_TEXT_BASE
        text_base = CONFIG_SYS_TEXT_BASE;
#else
        text_base = CONFIG_SYS_MONITOR_BASE;
#endif

        debug("U-Boot code: %08lX -> %08lX  BSS: -> %08lX\n",
              text_base, bss_start, bss_end);
#endif

        return 0;
}

#ifdef CONFIG_SYSRESET
static int print_resetinfo(void)
{
        struct udevice *dev;
        char status[256];
        int ret;

        ret = uclass_first_device_err(UCLASS_SYSRESET, &dev);
        if (ret) {
                debug("%s: No sysreset device found (error: %d)\n",
                      __func__, ret);
                /* Not all boards have sysreset drivers available during early
                 * boot, so don't fail if one can't be found.
                 */
                return 0;
        }

        if (!sysreset_get_status(dev, status, sizeof(status)))
                printf("%s", status);

        return 0;
}
#endif

#if defined(CONFIG_DISPLAY_CPUINFO) && CONFIG_IS_ENABLED(CPU)
static int print_cpuinfo(void)
{
        struct udevice *dev;
        char desc[512];
        int ret;

        dev = cpu_get_current_dev();
        if (!dev) {
                debug("%s: Could not get CPU device\n",
                      __func__);
                return -ENODEV;
        }

        ret = cpu_get_desc(dev, desc, sizeof(desc));
        if (ret) {
                debug("%s: Could not get CPU description (err = %d)\n",
                      dev->name, ret);
                return ret;
        }

        printf("CPU:   %s\n", desc);

        return 0;
}
#endif

static int announce_dram_init(void)
{
        puts("DRAM:  ");
        return 0;
}

static int show_dram_config(void)
{
        unsigned long long size;
        int i;

        debug("\nRAM Configuration:\n");
        for (i = size = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
                size += gd->bd->bi_dram[i].size;
                debug("Bank #%d: %llx ", i,
                      (unsigned long long)(gd->bd->bi_dram[i].start));
#ifdef DEBUG
                print_size(gd->bd->bi_dram[i].size, "\n");
#endif
        }
        debug("\nDRAM:  ");

        print_size(size, "");
        board_add_ram_info(0);
        putc('\n');

        return 0;
}

__weak int dram_init_banksize(void)
{
        gd->bd->bi_dram[0].start = gd->ram_base;
        gd->bd->bi_dram[0].size = get_effective_memsize();

        return 0;
}

#if defined(CONFIG_SYS_I2C_LEGACY)
static int init_func_i2c(void)
{
        puts("I2C:   ");
        i2c_init_all();
        puts("ready\n");
        return 0;
}
#endif

#if defined(CONFIG_VID)
__weak int init_func_vid(void)
{
        return 0;
}
#endif

static int setup_mon_len(void)
{
#if defined(__ARM__) || defined(__MICROBLAZE__)
        gd->mon_len = (ulong)&__bss_end - (ulong)_start;
#elif defined(CONFIG_SANDBOX)
        gd->mon_len = 0;
#elif defined(CONFIG_EFI_APP)
        gd->mon_len = (ulong)&_end - (ulong)_init;
#elif defined(CONFIG_NIOS2) || defined(CONFIG_XTENSA)
        gd->mon_len = CONFIG_SYS_MONITOR_LEN;
#elif defined(CONFIG_NDS32) || defined(CONFIG_SH) || defined(CONFIG_RISCV)
        gd->mon_len = (ulong)(&__bss_end) - (ulong)(&_start);
#elif defined(CONFIG_SYS_MONITOR_BASE)
        /* TODO: use (ulong)&__bss_end - (ulong)&__text_start; ? */
        gd->mon_len = (ulong)&__bss_end - CONFIG_SYS_MONITOR_BASE;
#endif
        return 0;
}

static int setup_spl_handoff(void)
{
#if CONFIG_IS_ENABLED(HANDOFF)
        gd->spl_handoff = bloblist_find(BLOBLISTT_SPL_HANDOFF,
                                        sizeof(struct spl_handoff));
        debug("Found SPL hand-off info %p\n", gd->spl_handoff);
#endif

        return 0;
}

__weak int arch_cpu_init(void)
{
        return 0;
}

__weak int mach_cpu_init(void)
{
        return 0;
}

/* Get the top of usable RAM */
__weak ulong board_get_usable_ram_top(ulong total_size)
{
#if defined(CONFIG_SYS_SDRAM_BASE) && CONFIG_SYS_SDRAM_BASE > 0
        /*
         * Detect whether we have so much RAM that it goes past the end of our
         * 32-bit address space. If so, clip the usable RAM so it doesn't.
         */
        if (gd->ram_top < CONFIG_SYS_SDRAM_BASE)
                /*
                 * Will wrap back to top of 32-bit space when reservations
                 * are made.
                 */
                return 0;
#endif
        return gd->ram_top;
}

static int setup_dest_addr(void)
{
        debug("Monitor len: %08lX\n", gd->mon_len);
        /*
         * Ram is setup, size stored in gd !!
         */
        debug("Ram size: %08lX\n", (ulong)gd->ram_size);
#if defined(CONFIG_SYS_MEM_TOP_HIDE)
        /*
         * Subtract specified amount of memory to hide so that it won't
         * get "touched" at all by U-Boot. By fixing up gd->ram_size
         * the Linux kernel should now get passed the now "corrected"
         * memory size and won't touch it either. This should work
         * for arch/ppc and arch/powerpc. Only Linux board ports in
         * arch/powerpc with bootwrapper support, that recalculate the
         * memory size from the SDRAM controller setup will have to
         * get fixed.
         */
        gd->ram_size -= CONFIG_SYS_MEM_TOP_HIDE;
#endif
#ifdef CONFIG_SYS_SDRAM_BASE
        gd->ram_base = CONFIG_SYS_SDRAM_BASE;
#endif
        gd->ram_top = gd->ram_base + get_effective_memsize();
        gd->ram_top = board_get_usable_ram_top(gd->mon_len);
        gd->relocaddr = gd->ram_top;
        debug("Ram top: %08lX\n", (ulong)gd->ram_top);
#if defined(CONFIG_MP) && (defined(CONFIG_MPC86xx) || defined(CONFIG_E500))
        /*
         * We need to make sure the location we intend to put secondary core
         * boot code is reserved and not used by any part of u-boot
         */
        if (gd->relocaddr > determine_mp_bootpg(NULL)) {
                gd->relocaddr = determine_mp_bootpg(NULL);
                debug("Reserving MP boot page to %08lx\n", gd->relocaddr);
        }
#endif
        return 0;
}

#ifdef CONFIG_PRAM
/* reserve protected RAM */
static int reserve_pram(void)
{
        ulong reg;

        reg = env_get_ulong("pram", 10, CONFIG_PRAM);
        gd->relocaddr -= (reg << 10);           /* size is in kB */
        debug("Reserving %ldk for protected RAM at %08lx\n", reg,
              gd->relocaddr);
        return 0;
}
#endif /* CONFIG_PRAM */

/* Round memory pointer down to next 4 kB limit */
static int reserve_round_4k(void)
{
        gd->relocaddr &= ~(4096 - 1);
        return 0;
}

__weak int arch_reserve_mmu(void)
{
        return 0;
}

static int reserve_video(void)
{
#ifdef CONFIG_DM_VIDEO
        ulong addr;
        int ret;

        addr = gd->relocaddr;
        ret = video_reserve(&addr);
        if (ret)
                return ret;
        debug("Reserving %luk for video at: %08lx\n",
              ((unsigned long)gd->relocaddr - addr) >> 10, addr);
        gd->relocaddr = addr;
#elif defined(CONFIG_LCD)
#  ifdef CONFIG_FB_ADDR
        gd->fb_base = CONFIG_FB_ADDR;
#  else
        /* reserve memory for LCD display (always full pages) */
        gd->relocaddr = lcd_setmem(gd->relocaddr);
        gd->fb_base = gd->relocaddr;
#  endif /* CONFIG_FB_ADDR */
#endif

        return 0;
}

static int reserve_trace(void)
{
#ifdef CONFIG_TRACE
        gd->relocaddr -= CONFIG_TRACE_BUFFER_SIZE;
        gd->trace_buff = map_sysmem(gd->relocaddr, CONFIG_TRACE_BUFFER_SIZE);
        debug("Reserving %luk for trace data at: %08lx\n",
              (unsigned long)CONFIG_TRACE_BUFFER_SIZE >> 10, gd->relocaddr);
#endif

        return 0;
}

static int reserve_uboot(void)
{
        if (!(gd->flags & GD_FLG_SKIP_RELOC)) {
                /*
                 * reserve memory for U-Boot code, data & bss
                 * round down to next 4 kB limit
                 */
                gd->relocaddr -= gd->mon_len;
                gd->relocaddr &= ~(4096 - 1);
        #if defined(CONFIG_E500) || defined(CONFIG_MIPS)
                /* round down to next 64 kB limit so that IVPR stays aligned */
                gd->relocaddr &= ~(65536 - 1);
        #endif

                debug("Reserving %ldk for U-Boot at: %08lx\n",
                      gd->mon_len >> 10, gd->relocaddr);
        }

        gd->start_addr_sp = gd->relocaddr;

        return 0;
}

/*
 * reserve after start_addr_sp the requested size and make the stack pointer
 * 16-byte aligned, this alignment is needed for cast on the reserved memory
 * ref = x86_64 ABI: https://reviews.llvm.org/D30049: 16 bytes
 *     = ARMv8 Instruction Set Overview: quad word, 16 bytes
 */
static unsigned long reserve_stack_aligned(size_t size)
{
        return ALIGN_DOWN(gd->start_addr_sp - size, 16);
}

#ifdef CONFIG_SYS_NONCACHED_MEMORY
static int reserve_noncached(void)
{
        /*
         * The value of gd->start_addr_sp must match the value of malloc_start
         * calculated in boatrd_f.c:initr_malloc(), which is passed to
         * board_r.c:mem_malloc_init() and then used by
         * cache.c:noncached_init()
         *
         * These calculations must match the code in cache.c:noncached_init()
         */
        gd->start_addr_sp = ALIGN(gd->start_addr_sp, MMU_SECTION_SIZE) -
                MMU_SECTION_SIZE;
        gd->start_addr_sp -= ALIGN(CONFIG_SYS_NONCACHED_MEMORY,
                                   MMU_SECTION_SIZE);
        debug("Reserving %dM for noncached_alloc() at: %08lx\n",
              CONFIG_SYS_NONCACHED_MEMORY >> 20, gd->start_addr_sp);

        return 0;
}
#endif

/* reserve memory for malloc() area */
static int reserve_malloc(void)
{
        gd->start_addr_sp = reserve_stack_aligned(TOTAL_MALLOC_LEN);
        debug("Reserving %dk for malloc() at: %08lx\n",
              TOTAL_MALLOC_LEN >> 10, gd->start_addr_sp);
#ifdef CONFIG_SYS_NONCACHED_MEMORY
        reserve_noncached();
#endif

        return 0;
}

/* (permanently) allocate a Board Info struct */
static int reserve_board(void)
{
        if (!gd->bd) {
                gd->start_addr_sp = reserve_stack_aligned(sizeof(struct bd_info));
                gd->bd = (struct bd_info *)map_sysmem(gd->start_addr_sp,
                                                      sizeof(struct bd_info));
                memset(gd->bd, '\0', sizeof(struct bd_info));
                debug("Reserving %zu Bytes for Board Info at: %08lx\n",
                      sizeof(struct bd_info), gd->start_addr_sp);
        }
        return 0;
}

static int reserve_global_data(void)
{
        gd->start_addr_sp = reserve_stack_aligned(sizeof(gd_t));
        gd->new_gd = (gd_t *)map_sysmem(gd->start_addr_sp, sizeof(gd_t));
        debug("Reserving %zu Bytes for Global Data at: %08lx\n",
              sizeof(gd_t), gd->start_addr_sp);
        return 0;
}

static int reserve_fdt(void)
{
        if (!IS_ENABLED(CONFIG_OF_EMBED)) {
                /*
                 * If the device tree is sitting immediately above our image
                 * then we must relocate it. If it is embedded in the data
                 * section, then it will be relocated with other data.
                 */
                if (gd->fdt_blob) {
                        gd->fdt_size = ALIGN(fdt_totalsize(gd->fdt_blob), 32);

                        gd->start_addr_sp = reserve_stack_aligned(gd->fdt_size);
                        gd->new_fdt = map_sysmem(gd->start_addr_sp, gd->fdt_size);
                        debug("Reserving %lu Bytes for FDT at: %08lx\n",
                              gd->fdt_size, gd->start_addr_sp);
                }
        }

        return 0;
}

static int reserve_bootstage(void)
{
#ifdef CONFIG_BOOTSTAGE
        int size = bootstage_get_size();

        gd->start_addr_sp = reserve_stack_aligned(size);
        gd->new_bootstage = map_sysmem(gd->start_addr_sp, size);
        debug("Reserving %#x Bytes for bootstage at: %08lx\n", size,
              gd->start_addr_sp);
#endif

        return 0;
}

__weak int arch_reserve_stacks(void)
{
        return 0;
}

static int reserve_stacks(void)
{
        /* make stack pointer 16-byte aligned */
        gd->start_addr_sp = reserve_stack_aligned(16);

        /*
         * let the architecture-specific code tailor gd->start_addr_sp and
         * gd->irq_sp
         */
        return arch_reserve_stacks();
}

static int reserve_bloblist(void)
{
#ifdef CONFIG_BLOBLIST
        /* Align to a 4KB boundary for easier reading of addresses */
        gd->start_addr_sp = ALIGN_DOWN(gd->start_addr_sp -
                                       CONFIG_BLOBLIST_SIZE_RELOC, 0x1000);
        gd->new_bloblist = map_sysmem(gd->start_addr_sp,
                                      CONFIG_BLOBLIST_SIZE_RELOC);
#endif

        return 0;
}

static int display_new_sp(void)
{
        debug("New Stack Pointer is: %08lx\n", gd->start_addr_sp);

        return 0;
}

__weak int arch_setup_bdinfo(void)
{
        return 0;
}

int setup_bdinfo(void)
{
        struct bd_info *bd = gd->bd;

        if (IS_ENABLED(CONFIG_SYS_HAS_SRAM)) {
                bd->bi_sramstart = CONFIG_SYS_SRAM_BASE; /* start of SRAM */
                bd->bi_sramsize = CONFIG_SYS_SRAM_SIZE;  /* size  of SRAM */
        }

#ifdef CONFIG_MACH_TYPE
        bd->bi_arch_number = CONFIG_MACH_TYPE; /* board id for Linux */
#endif

        return arch_setup_bdinfo();
}

#ifdef CONFIG_POST
static int init_post(void)
{
        post_bootmode_init();
        post_run(NULL, POST_ROM | post_bootmode_get(0));

        return 0;
}
#endif

static int reloc_fdt(void)
{
        if (!IS_ENABLED(CONFIG_OF_EMBED)) {
                if (gd->flags & GD_FLG_SKIP_RELOC)
                        return 0;
                if (gd->new_fdt) {
                        memcpy(gd->new_fdt, gd->fdt_blob,
                               fdt_totalsize(gd->fdt_blob));
                        gd->fdt_blob = gd->new_fdt;
                }
        }

        return 0;
}

static int reloc_bootstage(void)
{
#ifdef CONFIG_BOOTSTAGE
        if (gd->flags & GD_FLG_SKIP_RELOC)
                return 0;
        if (gd->new_bootstage) {
                int size = bootstage_get_size();

                debug("Copying bootstage from %p to %p, size %x\n",
                      gd->bootstage, gd->new_bootstage, size);
                memcpy(gd->new_bootstage, gd->bootstage, size);
                gd->bootstage = gd->new_bootstage;
                bootstage_relocate();
        }
#endif

        return 0;
}

static int reloc_bloblist(void)
{
#ifdef CONFIG_BLOBLIST
        if (gd->flags & GD_FLG_SKIP_RELOC)
                return 0;
        if (gd->new_bloblist) {
                int size = CONFIG_BLOBLIST_SIZE;

                debug("Copying bloblist from %p to %p, size %x\n",
                      gd->bloblist, gd->new_bloblist, size);
                bloblist_reloc(gd->new_bloblist, CONFIG_BLOBLIST_SIZE_RELOC,
                               gd->bloblist, size);
                gd->bloblist = gd->new_bloblist;
        }
#endif

        return 0;
}

static int setup_reloc(void)
{
        if (gd->flags & GD_FLG_SKIP_RELOC) {
                debug("Skipping relocation due to flag\n");
                return 0;
        }

#ifdef CONFIG_SYS_TEXT_BASE
#ifdef ARM
        gd->reloc_off = gd->relocaddr - (unsigned long)__image_copy_start;
#elif defined(CONFIG_M68K)
        /*
         * On all ColdFire arch cpu, monitor code starts always
         * just after the default vector table location, so at 0x400
         */
        gd->reloc_off = gd->relocaddr - (CONFIG_SYS_TEXT_BASE + 0x400);
#elif !defined(CONFIG_SANDBOX)
        gd->reloc_off = gd->relocaddr - CONFIG_SYS_TEXT_BASE;
#endif
#endif
        memcpy(gd->new_gd, (char *)gd, sizeof(gd_t));

        debug("Relocation Offset is: %08lx\n", gd->reloc_off);
        debug("Relocating to %08lx, new gd at %08lx, sp at %08lx\n",
              gd->relocaddr, (ulong)map_to_sysmem(gd->new_gd),
              gd->start_addr_sp);

        return 0;
}

#ifdef CONFIG_OF_BOARD_FIXUP
static int fix_fdt(void)
{
        return board_fix_fdt((void *)gd->fdt_blob);
}
#endif

/* ARM calls relocate_code from its crt0.S */
#if !defined(CONFIG_ARM) && !defined(CONFIG_SANDBOX) && \
                !CONFIG_IS_ENABLED(X86_64)

static int jump_to_copy(void)
{
        if (gd->flags & GD_FLG_SKIP_RELOC)
                return 0;
        /*
         * x86 is special, but in a nice way. It uses a trampoline which
         * enables the dcache if possible.
         *
         * For now, other archs use relocate_code(), which is implemented
         * similarly for all archs. When we do generic relocation, hopefully
         * we can make all archs enable the dcache prior to relocation.
         */
#if defined(CONFIG_X86) || defined(CONFIG_ARC)
        /*
         * SDRAM and console are now initialised. The final stack can now
         * be setup in SDRAM. Code execution will continue in Flash, but
         * with the stack in SDRAM and Global Data in temporary memory
         * (CPU cache)
         */
        arch_setup_gd(gd->new_gd);
        board_init_f_r_trampoline(gd->start_addr_sp);
#else
        relocate_code(gd->start_addr_sp, gd->new_gd, gd->relocaddr);
#endif

        return 0;
}
#endif

/* Record the board_init_f() bootstage (after arch_cpu_init()) */
static int initf_bootstage(void)
{
        bool from_spl = IS_ENABLED(CONFIG_SPL_BOOTSTAGE) &&
                        IS_ENABLED(CONFIG_BOOTSTAGE_STASH);
        int ret;

        ret = bootstage_init(!from_spl);
        if (ret)
                return ret;
        if (from_spl) {
                const void *stash = map_sysmem(CONFIG_BOOTSTAGE_STASH_ADDR,
                                               CONFIG_BOOTSTAGE_STASH_SIZE);

                ret = bootstage_unstash(stash, CONFIG_BOOTSTAGE_STASH_SIZE);
                if (ret && ret != -ENOENT) {
                        debug("Failed to unstash bootstage: err=%d\n", ret);
                        return ret;
                }
        }

        bootstage_mark_name(BOOTSTAGE_ID_START_UBOOT_F, "board_init_f");

        return 0;
}

static int initf_dm(void)
{
#if defined(CONFIG_DM) && CONFIG_VAL(SYS_MALLOC_F_LEN)
        int ret;

        bootstage_start(BOOTSTAGE_ID_ACCUM_DM_F, "dm_f");
        ret = dm_init_and_scan(true);
        bootstage_accum(BOOTSTAGE_ID_ACCUM_DM_F);
        if (ret)
                return ret;

        if (IS_ENABLED(CONFIG_TIMER_EARLY)) {
                ret = dm_timer_init();
                if (ret)
                        return ret;
        }
#endif

        return 0;
}

/* Architecture-specific memory reservation */
__weak int reserve_arch(void)
{
        return 0;
}

__weak int arch_cpu_init_dm(void)
{
        return 0;
}

__weak int checkcpu(void)
{
        return 0;
}

__weak int clear_bss(void)
{
        return 0;
}

static const init_fnc_t init_sequence_f[] = {
        setup_mon_len,
#ifdef CONFIG_OF_CONTROL
        fdtdec_setup,
#endif
#ifdef CONFIG_TRACE_EARLY
        trace_early_init,
#endif
        initf_malloc,
        log_init,
        initf_bootstage,        /* uses its own timer, so does not need DM */
#ifdef CONFIG_BLOBLIST
        bloblist_init,
#endif
        setup_spl_handoff,
#if defined(CONFIG_CONSOLE_RECORD_INIT_F)
        console_record_init,
#endif
#if defined(CONFIG_HAVE_FSP)
        arch_fsp_init,
#endif
        arch_cpu_init,          /* basic arch cpu dependent setup */
        mach_cpu_init,          /* SoC/machine dependent CPU setup */
        initf_dm,
        arch_cpu_init_dm,
#if defined(CONFIG_BOARD_EARLY_INIT_F)
        board_early_init_f,
#endif
#if defined(CONFIG_PPC) || defined(CONFIG_SYS_FSL_CLK) || defined(CONFIG_M68K)
        /* get CPU and bus clocks according to the environment variable */
        get_clocks,             /* get CPU and bus clocks (etc.) */
#endif
#if !defined(CONFIG_M68K)
        timer_init,             /* initialize timer */
#endif
#if defined(CONFIG_BOARD_POSTCLK_INIT)
        board_postclk_init,
#endif
        env_init,               /* initialize environment */
        init_baud_rate,         /* initialze baudrate settings */
        serial_init,            /* serial communications setup */
        console_init_f,         /* stage 1 init of console */
        display_options,        /* say that we are here */
        display_text_info,      /* show debugging info if required */
        checkcpu,
#if defined(CONFIG_SYSRESET)
        print_resetinfo,
#endif
#if defined(CONFIG_DISPLAY_CPUINFO)
        print_cpuinfo,          /* display cpu info (and speed) */
#endif
#if defined(CONFIG_DTB_RESELECT)
        embedded_dtb_select,
#endif
#if defined(CONFIG_DISPLAY_BOARDINFO)
        show_board_info,
#endif
        INIT_FUNC_WATCHDOG_INIT
#if defined(CONFIG_MISC_INIT_F)
        misc_init_f,
#endif
        INIT_FUNC_WATCHDOG_RESET
#if defined(CONFIG_SYS_I2C_LEGACY)
        init_func_i2c,
#endif
#if defined(CONFIG_VID) && !defined(CONFIG_SPL)
        init_func_vid,
#endif
        announce_dram_init,
        dram_init,              /* configure available RAM banks */
#ifdef CONFIG_POST
        post_init_f,
#endif
        INIT_FUNC_WATCHDOG_RESET
#if defined(CONFIG_SYS_DRAM_TEST)
        testdram,
#endif /* CONFIG_SYS_DRAM_TEST */
        INIT_FUNC_WATCHDOG_RESET

#ifdef CONFIG_POST
        init_post,
#endif
        INIT_FUNC_WATCHDOG_RESET
        /*
         * Now that we have DRAM mapped and working, we can
         * relocate the code and continue running from DRAM.
         *
         * Reserve memory at end of RAM for (top down in that order):
         *  - area that won't get touched by U-Boot and Linux (optional)
         *  - kernel log buffer
         *  - protected RAM
         *  - LCD framebuffer
         *  - monitor code
         *  - board info struct
         */
        setup_dest_addr,
#ifdef CONFIG_OF_BOARD_FIXUP
        fix_fdt,
#endif
#ifdef CONFIG_PRAM
        reserve_pram,
#endif
        reserve_round_4k,
        arch_reserve_mmu,
        reserve_video,
        reserve_trace,
        reserve_uboot,
        reserve_malloc,
        reserve_board,
        reserve_global_data,
        reserve_fdt,
        reserve_bootstage,
        reserve_bloblist,
        reserve_arch,
        reserve_stacks,
        dram_init_banksize,
        show_dram_config,
        INIT_FUNC_WATCHDOG_RESET
        setup_bdinfo,
        display_new_sp,
        INIT_FUNC_WATCHDOG_RESET
        reloc_fdt,
        reloc_bootstage,
        reloc_bloblist,
        setup_reloc,
#if defined(CONFIG_X86) || defined(CONFIG_ARC)
        copy_uboot_to_ram,
        do_elf_reloc_fixups,
#endif
        clear_bss,
#if !defined(CONFIG_ARM) && !defined(CONFIG_SANDBOX) && \
                !CONFIG_IS_ENABLED(X86_64)
        jump_to_copy,
#endif
        NULL,
};

void board_init_f(ulong boot_flags)
{
        gd->flags = boot_flags;
        gd->have_console = 0;

        if (initcall_run_list(init_sequence_f))
                hang();

#if !defined(CONFIG_ARM) && !defined(CONFIG_SANDBOX) && \
                !defined(CONFIG_EFI_APP) && !CONFIG_IS_ENABLED(X86_64) && \
                !defined(CONFIG_ARC)
        /* NOTREACHED - jump_to_copy() does not return */
        hang();
#endif
}

#if defined(CONFIG_X86) || defined(CONFIG_ARC)
/*
 * For now this code is only used on x86.
 *
 * init_sequence_f_r is the list of init functions which are run when
 * U-Boot is executing from Flash with a semi-limited 'C' environment.
 * The following limitations must be considered when implementing an
 * '_f_r' function:
 *  - 'static' variables are read-only
 *  - Global Data (gd->xxx) is read/write
 *
 * The '_f_r' sequence must, as a minimum, copy U-Boot to RAM (if
 * supported).  It _should_, if possible, copy global data to RAM and
 * initialise the CPU caches (to speed up the relocation process)
 *
 * NOTE: At present only x86 uses this route, but it is intended that
 * all archs will move to this when generic relocation is implemented.
 */
static const init_fnc_t init_sequence_f_r[] = {
#if !CONFIG_IS_ENABLED(X86_64)
        init_cache_f_r,
#endif

        NULL,
};

void board_init_f_r(void)
{
        if (initcall_run_list(init_sequence_f_r))
                hang();

        /*
         * The pre-relocation drivers may be using memory that has now gone
         * away. Mark serial as unavailable - this will fall back to the debug
         * UART if available.
         *

         * Do the same with log drivers since the memory may not be available.
         */
        gd->flags &= ~(GD_FLG_SERIAL_READY | GD_FLG_LOG_READY);
#ifdef CONFIG_TIMER
        gd->timer = NULL;
#endif

        /*
         * U-Boot has been copied into SDRAM, the BSS has been cleared etc.
         * Transfer execution from Flash to RAM by calculating the address
         * of the in-RAM copy of board_init_r() and calling it
         */
        (board_init_r + gd->reloc_off)((gd_t *)gd, gd->relocaddr);

        /* NOTREACHED - board_init_r() does not return */
        hang();
}
#endif /* CONFIG_X86 */