global: Convert simple_strtoul() with hex to hextoul()

[thirdparty/u-boot.git] / arch / x86 / lib / zimage.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright (c) 2011 The Chromium OS Authors.
 * (C) Copyright 2002
 * Daniel Engström, Omicron Ceti AB, <daniel@omicron.se>
 */

/*
 * Linux x86 zImage and bzImage loading
 *
 * based on the procdure described in
 * linux/Documentation/i386/boot.txt
 */

#define LOG_CATEGORY    LOGC_BOOT

#include <common.h>
#include <bootm.h>
#include <command.h>
#include <env.h>
#include <init.h>
#include <irq_func.h>
#include <log.h>
#include <malloc.h>
#include <acpi/acpi_table.h>
#include <asm/io.h>
#include <asm/ptrace.h>
#include <asm/zimage.h>
#include <asm/byteorder.h>
#include <asm/bootm.h>
#include <asm/bootparam.h>
#include <asm/global_data.h>
#ifdef CONFIG_SYS_COREBOOT
#include <asm/arch/timestamp.h>
#endif
#include <linux/compiler.h>
#include <linux/ctype.h>
#include <linux/libfdt.h>

DECLARE_GLOBAL_DATA_PTR;

/*
 * Memory lay-out:
 *
 * relative to setup_base (which is 0x90000 currently)
 *
 *      0x0000-0x7FFF   Real mode kernel
 *      0x8000-0x8FFF   Stack and heap
 *      0x9000-0x90FF   Kernel command line
 */
#define DEFAULT_SETUP_BASE      0x90000
#define COMMAND_LINE_OFFSET     0x9000
#define HEAP_END_OFFSET         0x8e00

#define COMMAND_LINE_SIZE       2048

/**
 * struct zboot_state - Current state of the boot
 *
 * @bzimage_addr: Address of the bzImage to boot
 * @bzimage_size: Size of the bzImage, or 0 to detect this
 * @initrd_addr: Address of the initial ramdisk, or 0 if none
 * @initrd_size: Size of the initial ramdisk, or 0 if none
 * @load_address: Address where the bzImage is moved before booting, either
 *      BZIMAGE_LOAD_ADDR or ZIMAGE_LOAD_ADDR
 * @base_ptr: Pointer to the boot parameters, typically at address
 *      DEFAULT_SETUP_BASE
 * @cmdline: Environment variable containing the 'override' command line, or
 *      NULL to use the one in the setup block
 */
struct zboot_state {
        ulong bzimage_addr;
        ulong bzimage_size;
        ulong initrd_addr;
        ulong initrd_size;
        ulong load_address;
        struct boot_params *base_ptr;
        char *cmdline;
} state;

enum {
        ZBOOT_STATE_START       = BIT(0),
        ZBOOT_STATE_LOAD        = BIT(1),
        ZBOOT_STATE_SETUP       = BIT(2),
        ZBOOT_STATE_INFO        = BIT(3),
        ZBOOT_STATE_GO          = BIT(4),

        /* This one doesn't execute automatically, so stop the count before 5 */
        ZBOOT_STATE_DUMP        = BIT(5),
        ZBOOT_STATE_COUNT       = 5,
};

static void build_command_line(char *command_line, int auto_boot)
{
        char *env_command_line;

        command_line[0] = '\0';

        env_command_line =  env_get("bootargs");

        /* set console= argument if we use a serial console */
        if (!strstr(env_command_line, "console=")) {
                if (!strcmp(env_get("stdout"), "serial")) {

                        /* We seem to use serial console */
                        sprintf(command_line, "console=ttyS0,%s ",
                                env_get("baudrate"));
                }
        }

        if (auto_boot)
                strcat(command_line, "auto ");

        if (env_command_line)
                strcat(command_line, env_command_line);
#ifdef DEBUG
        printf("Kernel command line:");
        puts(command_line);
        printf("\n");
#endif
}

static int kernel_magic_ok(struct setup_header *hdr)
{
        if (KERNEL_MAGIC != hdr->boot_flag) {
                printf("Error: Invalid Boot Flag "
                        "(found 0x%04x, expected 0x%04x)\n",
                        hdr->boot_flag, KERNEL_MAGIC);
                return 0;
        } else {
                printf("Valid Boot Flag\n");
                return 1;
        }
}

static int get_boot_protocol(struct setup_header *hdr, bool verbose)
{
        if (hdr->header == KERNEL_V2_MAGIC) {
                if (verbose)
                        printf("Magic signature found\n");
                return hdr->version;
        } else {
                /* Very old kernel */
                if (verbose)
                        printf("Magic signature not found\n");
                return 0x0100;
        }
}

static int setup_device_tree(struct setup_header *hdr, const void *fdt_blob)
{
        int bootproto = get_boot_protocol(hdr, false);
        struct setup_data *sd;
        int size;

        if (bootproto < 0x0209)
                return -ENOTSUPP;

        if (!fdt_blob)
                return 0;

        size = fdt_totalsize(fdt_blob);
        if (size < 0)
                return -EINVAL;

        size += sizeof(struct setup_data);
        sd = (struct setup_data *)malloc(size);
        if (!sd) {
                printf("Not enough memory for DTB setup data\n");
                return -ENOMEM;
        }

        sd->next = hdr->setup_data;
        sd->type = SETUP_DTB;
        sd->len = fdt_totalsize(fdt_blob);
        memcpy(sd->data, fdt_blob, sd->len);
        hdr->setup_data = (unsigned long)sd;

        return 0;
}

static const char *get_kernel_version(struct boot_params *params,
                                      void *kernel_base)
{
        struct setup_header *hdr = &params->hdr;
        int bootproto;
        const char *s, *end;

        bootproto = get_boot_protocol(hdr, false);
        if (bootproto < 0x0200 || hdr->setup_sects < 15)
                return NULL;

        /* sanity-check the kernel version in case it is missing */
        for (s = kernel_base + hdr->kernel_version + 0x200, end = s + 0x100; *s;
             s++) {
                if (!isprint(*s))
                        return NULL;
        }

        return kernel_base + hdr->kernel_version + 0x200;
}

struct boot_params *load_zimage(char *image, unsigned long kernel_size,
                                ulong *load_addressp)
{
        struct boot_params *setup_base;
        const char *version;
        int setup_size;
        int bootproto;
        int big_image;

        struct boot_params *params = (struct boot_params *)image;
        struct setup_header *hdr = &params->hdr;

        /* base address for real-mode segment */
        setup_base = (struct boot_params *)DEFAULT_SETUP_BASE;

        if (!kernel_magic_ok(hdr))
                return 0;

        /* determine size of setup */
        if (0 == hdr->setup_sects) {
                log_warning("Setup Sectors = 0 (defaulting to 4)\n");
                setup_size = 5 * 512;
        } else {
                setup_size = (hdr->setup_sects + 1) * 512;
        }

        log_debug("Setup Size = 0x%8.8lx\n", (ulong)setup_size);

        if (setup_size > SETUP_MAX_SIZE)
                printf("Error: Setup is too large (%d bytes)\n", setup_size);

        /* determine boot protocol version */
        bootproto = get_boot_protocol(hdr, true);

        log_debug("Using boot protocol version %x.%02x\n",
                  (bootproto & 0xff00) >> 8, bootproto & 0xff);

        version = get_kernel_version(params, image);
        if (version)
                printf("Linux kernel version %s\n", version);
        else
                printf("Setup Sectors < 15 - Cannot print kernel version\n");

        /* Determine image type */
        big_image = (bootproto >= 0x0200) &&
                    (hdr->loadflags & BIG_KERNEL_FLAG);

        /* Determine load address */
        if (big_image)
                *load_addressp = BZIMAGE_LOAD_ADDR;
        else
                *load_addressp = ZIMAGE_LOAD_ADDR;

        printf("Building boot_params at 0x%8.8lx\n", (ulong)setup_base);
        memset(setup_base, 0, sizeof(*setup_base));
        setup_base->hdr = params->hdr;

        if (bootproto >= 0x0204)
                kernel_size = hdr->syssize * 16;
        else
                kernel_size -= setup_size;

        if (bootproto == 0x0100) {
                /*
                 * A very old kernel MUST have its real-mode code
                 * loaded at 0x90000
                 */
                if ((ulong)setup_base != 0x90000) {
                        /* Copy the real-mode kernel */
                        memmove((void *)0x90000, setup_base, setup_size);

                        /* Copy the command line */
                        memmove((void *)0x99000,
                                (u8 *)setup_base + COMMAND_LINE_OFFSET,
                                COMMAND_LINE_SIZE);

                         /* Relocated */
                        setup_base = (struct boot_params *)0x90000;
                }

                /* It is recommended to clear memory up to the 32K mark */
                memset((u8 *)0x90000 + setup_size, 0,
                       SETUP_MAX_SIZE - setup_size);
        }

        if (big_image) {
                if (kernel_size > BZIMAGE_MAX_SIZE) {
                        printf("Error: bzImage kernel too big! "
                                "(size: %ld, max: %d)\n",
                                kernel_size, BZIMAGE_MAX_SIZE);
                        return 0;
                }
        } else if ((kernel_size) > ZIMAGE_MAX_SIZE) {
                printf("Error: zImage kernel too big! (size: %ld, max: %d)\n",
                       kernel_size, ZIMAGE_MAX_SIZE);
                return 0;
        }

        printf("Loading %s at address %lx (%ld bytes)\n",
               big_image ? "bzImage" : "zImage", *load_addressp, kernel_size);

        memmove((void *)*load_addressp, image + setup_size, kernel_size);

        return setup_base;
}

int setup_zimage(struct boot_params *setup_base, char *cmd_line, int auto_boot,
                 ulong initrd_addr, ulong initrd_size, ulong cmdline_force)
{
        struct setup_header *hdr = &setup_base->hdr;
        int bootproto = get_boot_protocol(hdr, false);

        log_debug("Setup E820 entries\n");
        if (IS_ENABLED(CONFIG_COREBOOT_SYSINFO)) {
                setup_base->e820_entries = cb_install_e820_map(
                        ARRAY_SIZE(setup_base->e820_map), setup_base->e820_map);
        } else {
                setup_base->e820_entries = install_e820_map(
                        ARRAY_SIZE(setup_base->e820_map), setup_base->e820_map);
        }

        if (bootproto == 0x0100) {
                setup_base->screen_info.cl_magic = COMMAND_LINE_MAGIC;
                setup_base->screen_info.cl_offset = COMMAND_LINE_OFFSET;
        }
        if (bootproto >= 0x0200) {
                hdr->type_of_loader = 0x80;     /* U-Boot version 0 */
                if (initrd_addr) {
                        printf("Initial RAM disk at linear address "
                               "0x%08lx, size %ld bytes\n",
                               initrd_addr, initrd_size);

                        hdr->ramdisk_image = initrd_addr;
                        hdr->ramdisk_size = initrd_size;
                }
        }

        if (bootproto >= 0x0201) {
                hdr->heap_end_ptr = HEAP_END_OFFSET;
                hdr->loadflags |= HEAP_FLAG;
        }

        if (cmd_line) {
                int max_size = 0xff;
                int ret;

                log_debug("Setup cmdline\n");
                if (bootproto >= 0x0206)
                        max_size = hdr->cmdline_size;
                if (bootproto >= 0x0202) {
                        hdr->cmd_line_ptr = (uintptr_t)cmd_line;
                } else if (bootproto >= 0x0200) {
                        setup_base->screen_info.cl_magic = COMMAND_LINE_MAGIC;
                        setup_base->screen_info.cl_offset =
                                (uintptr_t)cmd_line - (uintptr_t)setup_base;

                        hdr->setup_move_size = 0x9100;
                }

                /* build command line at COMMAND_LINE_OFFSET */
                if (cmdline_force)
                        strcpy(cmd_line, (char *)cmdline_force);
                else
                        build_command_line(cmd_line, auto_boot);
                ret = bootm_process_cmdline(cmd_line, max_size, BOOTM_CL_ALL);
                if (ret) {
                        printf("Cmdline setup failed (max_size=%x, bootproto=%x, err=%d)\n",
                               max_size, bootproto, ret);
                        return ret;
                }
                printf("Kernel command line: \"");
                puts(cmd_line);
                printf("\"\n");
        }

        if (IS_ENABLED(CONFIG_INTEL_MID) && bootproto >= 0x0207)
                hdr->hardware_subarch = X86_SUBARCH_INTEL_MID;

        if (IS_ENABLED(CONFIG_GENERATE_ACPI_TABLE))
                setup_base->acpi_rsdp_addr = acpi_get_rsdp_addr();

        log_debug("Setup devicetree\n");
        setup_device_tree(hdr, (const void *)env_get_hex("fdtaddr", 0));
        setup_video(&setup_base->screen_info);

        if (IS_ENABLED(CONFIG_EFI_STUB))
                setup_efi_info(&setup_base->efi_info);

        return 0;
}

static int do_zboot_start(struct cmd_tbl *cmdtp, int flag, int argc,
                          char *const argv[])
{
        const char *s;

        memset(&state, '\0', sizeof(state));
        if (argc >= 2) {
                /* argv[1] holds the address of the bzImage */
                s = argv[1];
        } else {
                s = env_get("fileaddr");
        }

        if (s)
                state.bzimage_addr = hextoul(s, NULL);

        if (argc >= 3) {
                /* argv[2] holds the size of the bzImage */
                state.bzimage_size = hextoul(argv[2], NULL);
        }

        if (argc >= 4)
                state.initrd_addr = hextoul(argv[3], NULL);
        if (argc >= 5)
                state.initrd_size = hextoul(argv[4], NULL);
        if (argc >= 6) {
                /*
                 * When the base_ptr is passed in, we assume that the image is
                 * already loaded at the address given by argv[1] and therefore
                 * the original bzImage is somewhere else, or not accessible.
                 * In any case, we don't need access to the bzImage since all
                 * the processing is assumed to be done.
                 *
                 * So set the base_ptr to the given address, use this arg as the
                 * load address and set bzimage_addr to 0 so we know that it
                 * cannot be proceesed (or processed again).
                 */
                state.base_ptr = (void *)hextoul(argv[5], NULL);
                state.load_address = state.bzimage_addr;
                state.bzimage_addr = 0;
        }
        if (argc >= 7)
                state.cmdline = env_get(argv[6]);

        return 0;
}

static int do_zboot_load(struct cmd_tbl *cmdtp, int flag, int argc,
                         char *const argv[])
{
        struct boot_params *base_ptr;

        if (state.base_ptr) {
                struct boot_params *from = (struct boot_params *)state.base_ptr;

                base_ptr = (struct boot_params *)DEFAULT_SETUP_BASE;
                log_debug("Building boot_params at 0x%8.8lx\n",
                          (ulong)base_ptr);
                memset(base_ptr, '\0', sizeof(*base_ptr));
                base_ptr->hdr = from->hdr;
        } else {
                base_ptr = load_zimage((void *)state.bzimage_addr, state.bzimage_size,
                                       &state.load_address);
                if (!base_ptr) {
                        puts("## Kernel loading failed ...\n");
                        return CMD_RET_FAILURE;
                }
        }
        state.base_ptr = base_ptr;
        if (env_set_hex("zbootbase", (ulong)base_ptr) ||
            env_set_hex("zbootaddr", state.load_address))
                return CMD_RET_FAILURE;

        return 0;
}

static int do_zboot_setup(struct cmd_tbl *cmdtp, int flag, int argc,
                          char *const argv[])
{
        struct boot_params *base_ptr = state.base_ptr;
        int ret;

        if (!base_ptr) {
                printf("base is not set: use 'zboot load' first\n");
                return CMD_RET_FAILURE;
        }
        ret = setup_zimage(base_ptr, (char *)base_ptr + COMMAND_LINE_OFFSET,
                           0, state.initrd_addr, state.initrd_size,
                           (ulong)state.cmdline);
        if (ret) {
                puts("Setting up boot parameters failed ...\n");
                return CMD_RET_FAILURE;
        }

        return 0;
}

static int do_zboot_info(struct cmd_tbl *cmdtp, int flag, int argc,
                         char *const argv[])
{
        printf("Kernel loaded at %08lx, setup_base=%p\n",
               state.load_address, state.base_ptr);

        return 0;
}

static int do_zboot_go(struct cmd_tbl *cmdtp, int flag, int argc,
                       char *const argv[])
{
        int ret;

        disable_interrupts();

        /* we assume that the kernel is in place */
        ret = boot_linux_kernel((ulong)state.base_ptr, state.load_address,
                                false);
        printf("Kernel returned! (err=%d)\n", ret);

        return CMD_RET_FAILURE;
}

static void print_num(const char *name, ulong value)
{
        printf("%-20s: %lx\n", name, value);
}

static void print_num64(const char *name, u64 value)
{
        printf("%-20s: %llx\n", name, value);
}

static const char *const e820_type_name[E820_COUNT] = {
        [E820_RAM] = "RAM",
        [E820_RESERVED] = "Reserved",
        [E820_ACPI] = "ACPI",
        [E820_NVS] = "ACPI NVS",
        [E820_UNUSABLE] = "Unusable",
};

static const char *const bootloader_id[] = {
        "LILO",
        "Loadlin",
        "bootsect-loader",
        "Syslinux",
        "Etherboot/gPXE/iPXE",
        "ELILO",
        "undefined",
        "GRUB",
        "U-Boot",
        "Xen",
        "Gujin",
        "Qemu",
        "Arcturus Networks uCbootloader",
        "kexec-tools",
        "Extended",
        "Special",
        "Reserved",
        "Minimal Linux Bootloader",
        "OVMF UEFI virtualization stack",
};

struct flag_info {
        uint bit;
        const char *name;
};

static struct flag_info load_flags[] = {
        { LOADED_HIGH, "loaded-high" },
        { QUIET_FLAG, "quiet" },
        { KEEP_SEGMENTS, "keep-segments" },
        { CAN_USE_HEAP, "can-use-heap" },
};

static struct flag_info xload_flags[] = {
        { XLF_KERNEL_64, "64-bit-entry" },
        { XLF_CAN_BE_LOADED_ABOVE_4G, "can-load-above-4gb" },
        { XLF_EFI_HANDOVER_32, "32-efi-handoff" },
        { XLF_EFI_HANDOVER_64, "64-efi-handoff" },
        { XLF_EFI_KEXEC, "kexec-efi-runtime" },
};

static void print_flags(struct flag_info *flags, int count, uint value)
{
        int i;

        printf("%-20s:", "");
        for (i = 0; i < count; i++) {
                uint mask = flags[i].bit;

                if (value & mask)
                        printf(" %s", flags[i].name);
        }
        printf("\n");
}

static void show_loader(struct setup_header *hdr)
{
        bool version_valid = false;
        int type, version;
        const char *name;

        type = hdr->type_of_loader >> 4;
        version = hdr->type_of_loader & 0xf;
        if (type == 0xe)
                type = 0x10 + hdr->ext_loader_type;
        version |= hdr->ext_loader_ver << 4;
        if (!hdr->type_of_loader) {
                name = "pre-2.00 bootloader";
        } else if (hdr->type_of_loader == 0xff) {
                name = "unknown";
        } else if (type < ARRAY_SIZE(bootloader_id)) {
                name = bootloader_id[type];
                version_valid = true;
        } else {
                name = "undefined";
        }
        printf("%20s  %s", "", name);
        if (version_valid)
                printf(", version %x", version);
        printf("\n");
}

void zimage_dump(struct boot_params *base_ptr)
{
        struct setup_header *hdr;
        const char *version;
        int i;

        printf("Setup located at %p:\n\n", base_ptr);
        print_num64("ACPI RSDP addr", base_ptr->acpi_rsdp_addr);

        printf("E820: %d entries\n", base_ptr->e820_entries);
        if (base_ptr->e820_entries) {
                printf("%18s  %16s  %s\n", "Addr", "Size", "Type");
                for (i = 0; i < base_ptr->e820_entries; i++) {
                        struct e820_entry *entry = &base_ptr->e820_map[i];

                        printf("%12llx  %10llx  %s\n", entry->addr, entry->size,
                               entry->type < E820_COUNT ?
                               e820_type_name[entry->type] :
                               simple_itoa(entry->type));
                }
        }

        hdr = &base_ptr->hdr;
        print_num("Setup sectors", hdr->setup_sects);
        print_num("Root flags", hdr->root_flags);
        print_num("Sys size", hdr->syssize);
        print_num("RAM size", hdr->ram_size);
        print_num("Video mode", hdr->vid_mode);
        print_num("Root dev", hdr->root_dev);
        print_num("Boot flag", hdr->boot_flag);
        print_num("Jump", hdr->jump);
        print_num("Header", hdr->header);
        if (hdr->header == KERNEL_V2_MAGIC)
                printf("%-20s  %s\n", "", "Kernel V2");
        else
                printf("%-20s  %s\n", "", "Ancient kernel, using version 100");
        print_num("Version", hdr->version);
        print_num("Real mode switch", hdr->realmode_swtch);
        print_num("Start sys", hdr->start_sys);
        print_num("Kernel version", hdr->kernel_version);
        version = get_kernel_version(base_ptr, (void *)state.bzimage_addr);
        if (version)
                printf("   @%p: %s\n", version, version);
        print_num("Type of loader", hdr->type_of_loader);
        show_loader(hdr);
        print_num("Load flags", hdr->loadflags);
        print_flags(load_flags, ARRAY_SIZE(load_flags), hdr->loadflags);
        print_num("Setup move size", hdr->setup_move_size);
        print_num("Code32 start", hdr->code32_start);
        print_num("Ramdisk image", hdr->ramdisk_image);
        print_num("Ramdisk size", hdr->ramdisk_size);
        print_num("Bootsect kludge", hdr->bootsect_kludge);
        print_num("Heap end ptr", hdr->heap_end_ptr);
        print_num("Ext loader ver", hdr->ext_loader_ver);
        print_num("Ext loader type", hdr->ext_loader_type);
        print_num("Command line ptr", hdr->cmd_line_ptr);
        if (hdr->cmd_line_ptr) {
                printf("   ");
                /* Use puts() to avoid limits from CONFIG_SYS_PBSIZE */
                puts((char *)(ulong)hdr->cmd_line_ptr);
                printf("\n");
        }
        print_num("Initrd addr max", hdr->initrd_addr_max);
        print_num("Kernel alignment", hdr->kernel_alignment);
        print_num("Relocatable kernel", hdr->relocatable_kernel);
        print_num("Min alignment", hdr->min_alignment);
        if (hdr->min_alignment)
                printf("%-20s: %x\n", "", 1 << hdr->min_alignment);
        print_num("Xload flags", hdr->xloadflags);
        print_flags(xload_flags, ARRAY_SIZE(xload_flags), hdr->xloadflags);
        print_num("Cmdline size", hdr->cmdline_size);
        print_num("Hardware subarch", hdr->hardware_subarch);
        print_num64("HW subarch data", hdr->hardware_subarch_data);
        print_num("Payload offset", hdr->payload_offset);
        print_num("Payload length", hdr->payload_length);
        print_num64("Setup data", hdr->setup_data);
        print_num64("Pref address", hdr->pref_address);
        print_num("Init size", hdr->init_size);
        print_num("Handover offset", hdr->handover_offset);
        if (get_boot_protocol(hdr, false) >= 0x215)
                print_num("Kernel info offset", hdr->kernel_info_offset);
}

static int do_zboot_dump(struct cmd_tbl *cmdtp, int flag, int argc,
                         char *const argv[])
{
        struct boot_params *base_ptr = state.base_ptr;

        if (argc > 1)
                base_ptr = (void *)hextoul(argv[1], NULL);
        if (!base_ptr) {
                printf("No zboot setup_base\n");
                return CMD_RET_FAILURE;
        }
        zimage_dump(base_ptr);

        return 0;
}

/* Note: This defines the complete_zboot() function */
U_BOOT_SUBCMDS(zboot,
        U_BOOT_CMD_MKENT(start, 8, 1, do_zboot_start, "", ""),
        U_BOOT_CMD_MKENT(load, 1, 1, do_zboot_load, "", ""),
        U_BOOT_CMD_MKENT(setup, 1, 1, do_zboot_setup, "", ""),
        U_BOOT_CMD_MKENT(info, 1, 1, do_zboot_info, "", ""),
        U_BOOT_CMD_MKENT(go, 1, 1, do_zboot_go, "", ""),
        U_BOOT_CMD_MKENT(dump, 2, 1, do_zboot_dump, "", ""),
)

int do_zboot_states(struct cmd_tbl *cmdtp, int flag, int argc,
                    char *const argv[], int state_mask)
{
        int i;

        for (i = 0; i < ZBOOT_STATE_COUNT; i++) {
                struct cmd_tbl *cmd = &zboot_subcmds[i];
                int mask = 1 << i;
                int ret;

                if (mask & state_mask) {
                        ret = cmd->cmd(cmd, flag, argc, argv);
                        if (ret)
                                return ret;
                }
        }

        return 0;
}

int do_zboot_parent(struct cmd_tbl *cmdtp, int flag, int argc,
                    char *const argv[], int *repeatable)
{
        /* determine if we have a sub command */
        if (argc > 1) {
                char *endp;

                hextoul(argv[1], &endp);
                /*
                 * endp pointing to nul means that argv[1] was just a valid
                 * number, so pass it along to the normal processing
                 */
                if (*endp)
                        return do_zboot(cmdtp, flag, argc, argv, repeatable);
        }

        do_zboot_states(cmdtp, flag, argc, argv, ZBOOT_STATE_START |
                        ZBOOT_STATE_LOAD | ZBOOT_STATE_SETUP |
                        ZBOOT_STATE_INFO | ZBOOT_STATE_GO);

        return CMD_RET_FAILURE;
}

U_BOOT_CMDREP_COMPLETE(
        zboot, 8, do_zboot_parent, "Boot bzImage",
        "[addr] [size] [initrd addr] [initrd size] [setup] [cmdline]\n"
        "      addr -        The optional starting address of the bzimage.\n"
        "                    If not set it defaults to the environment\n"
        "                    variable \"fileaddr\".\n"
        "      size -        The optional size of the bzimage. Defaults to\n"
        "                    zero.\n"
        "      initrd addr - The address of the initrd image to use, if any.\n"
        "      initrd size - The size of the initrd image to use, if any.\n"
        "      setup -       The address of the kernel setup region, if this\n"
        "                    is not at addr\n"
        "      cmdline -     Environment variable containing the kernel\n"
        "                    command line, to override U-Boot's normal\n"
        "                    cmdline generation\n"
        "\n"
        "Sub-commands to do part of the zboot sequence:\n"
        "\tstart [addr [arg ...]] - specify arguments\n"
        "\tload   - load OS image\n"
        "\tsetup  - set up table\n"
        "\tinfo   - show summary info\n"
        "\tgo     - start OS\n"
        "\tdump [addr]    - dump info (optional address of boot params)",
        complete_zboot
);