MRPROPER_FILES += \
        arch/arm/tools/constants.h* \
        include/asm-arm/arch \
        include/asm-arm/proc \
        include/asm-arm/constants.h* \
        include/asm-arm/mach-types.h

# We use MRPROPER_FILES and CLEAN_FILES now
archmrproper:
        @/bin/true

archclean:
        @$(MAKEBOOT) clean

archdep: scripts/mkdep archsymlinks
        @$(MAKETOOLS) dep
        @$(MAKEBOOT) dep

MAKEBOOT = $(MAKE) -C arch/$(ARCH)/boot
MAKETOOLS = $(MAKE) -C arch/$(ARCH)/tools

all: $(TOPDIR)/include/asm-arm/mach-types.h \
        $(TOPDIR)/include/asm-arm/constants.h

$(TOPDIR)/include/asm-arm/mach-types.h: mach-types gen-mach-types
        awk -f gen-mach-types mach-types > $@

#ifdef CONFIG_S3C2410_SMDK
# ifdef machine_arch_type
# undef machine_arch_type
# define machine_arch_type __machine_arch_type
# else
# define machine_arch_type MACH_TYPE_SMDK2410
# endif
# define machine_is_smdk2410() (machine_arch_type == MACH_TYPE_SMDK2410)
#else
# define machine_is_smdk2410() (0)
#endif

struct machine_desc {
    /*
     * Note! The first four elements are used
     * by assembler code in head-armv.S
     */
    unsigned int        nr;        /* architecture number    */
    unsigned int        phys_ram;    /* start of physical ram */
    unsigned int        phys_io;    /* start of physical io    */
    unsigned int        io_pg_offst;    /* byte offset for io
                         * page tabe entry    */

    const char        *name;        /* architecture name    */
    unsigned int        param_offset;    /* parameter page    */

    unsigned int        video_start;    /* start of video RAM    */
    unsigned int        video_end;    /* end of video RAM    */

    unsigned int        reserve_lp0 :1;    /* never has lp0    */
    unsigned int        reserve_lp1 :1;    /* never has lp1    */
    unsigned int        reserve_lp2 :1;    /* never has lp2    */
    unsigned int        soft_reboot :1;    /* soft reboot        */
    void            (*fixup)(struct machine_desc *,
                     struct param_struct *, char **,
                     struct meminfo *);
    void            (*map_io)(void);/* IO mapping function    */
    void            (*init_irq)(void);
};


/*
 * Set of macros to define architecture features. This is built into
 * a table by the linker.
 */
#define MACHINE_START(_type,_name) \
const struct machine_desc __mach_desc_##_type \
 __attribute__((__section__(".arch.info"))) = { \
        nr: MACH_TYPE_##_type, \
        name: _name,

#define MAINTAINER(n)

#define BOOT_MEM(_pram,_pio,_vio) \
        phys_ram: _pram, \
        phys_io: _pio, \
        io_pg_offst: ((_vio)>>18)&0xfffc,

#define BOOT_PARAMS(_params) \
        param_offset: _params,

#define VIDEO(_start,_end) \
        video_start: _start, \
        video_end: _end,

#define DISABLE_PARPORT(_n) \
        reserve_lp##_n: 1,

#define BROKEN_HLT /* unused */

#define SOFT_REBOOT \
        soft_reboot: 1,

#define FIXUP(_func) \
        fixup: _func,

#define MAPIO(_func) \
        map_io: _func,

#define INITIRQ(_func) \
        init_irq: _func,

#define MACHINE_END \
};


MACHINE_START(SMDK2410, "Embest EduKit III (S3C2410x)")
    BOOT_MEM(0x30000000, 0x48000000, 0xe8000000)
    BOOT_PARAMS(0x30000100)
    FIXUP(fixup_smdk)
    MAPIO(smdk_map_io)
    INITIRQ(s3c2410_init_irq)
MACHINE_END

const struct machine_desc __mach_desc_smdk2410 = {
    nr: 193,
    name: "EDUKIT-III (s3c2410)",
    phys_ram: 0x30000000,
    phys_to: 0x48000000,
    io_pg_offset: 0x3a00,
    param_offset: 0x30000100,
    fixup: fixup_smdk,//实际上为空
    map_io: smdk_map_io,
    init_irq: s3c2410_init_irq,
};

static struct machine_desc * __init setup_machine(unsigned int nr)
{
    extern struct machine_desc __arch_info_begin, __arch_info_end;
    struct machine_desc *list;

    /*
     * locate architecture in the list of supported architectures.
     */
    for (list = &__arch_info_begin; list < &__arch_info_end; list++)
        if (list->nr == nr)
            break;

    /*
     * If the architecture type is not recognised, then we
     * can co nothing...
     */
    if (list >= &__arch_info_end) {
        printk("Architecture configuration botched (nr %d), unable "
         "to continue.\n", nr);
        while (1);
    }

    printk("Machine: %s\n", list->name);

    return list;
}

.init : { /* Init code and data */
                _stext = .;
                __init_begin = .;
                        *(.text.init)
                __proc_info_begin = .;
                        *(.proc.info)
                __proc_info_end = .;
                __arch_info_begin = .;
                        *(.arch.info)
                __arch_info_end = .;
                __tagtable_begin = .;
                        *(.taglist)
                __tagtable_end = .;

    if (mdesc->param_offset)
        tags = phys_to_virt(mdesc->param_offset);

    if (tags && tags->hdr.tag != ATAG_CORE)
        convert_to_tag_list((struct param_struct *)tags,
                 meminfo.nr_banks == 0);

    if (tags && tags->hdr.tag == ATAG_CORE)
        parse_tags(tags);

/*
 * Scan the tag table for this tag, and call its parse function.
 * The tag table is built by the linker from all the __tagtable
 * declarations.
 */
static int __init parse_tag(const struct tag *tag)
{
    extern struct tagtable __tagtable_begin, __tagtable_end;
    struct tagtable *t;

    for (t = &__tagtable_begin; t < &__tagtable_end; t++)
        if (tag->hdr.tag == t->tag) {
            t->parse(tag);
            break;
        }

    return t < &__tagtable_end;
}

#define __tag __attribute__((unused, __section__(".taglist")))
#define __tagtable(tag, fn) \
static struct tagtable __tagtable_##fn __tag = { tag, fn }

__tagtable(ATAG_CMDLINE, parse_tag_cmdline);

static struct tagtable __tagtable_ATAG_CMDLINE __tag = {
    ATAG_CMDLINE,
    parse_tag_cmdline
};

static int __init parse_tag_cmdline(const struct tag *tag)
{
#ifndef CONFIG_NO_TAG_CMDLINE
    strncpy(default_command_line, tag->u.cmdline.cmdline, COMMAND_LINE_SIZE);
#endif
    default_command_line[COMMAND_LINE_SIZE - 1] = '\0';
    return 0;
}

char *from = default_command_line;

memcpy(saved_command_line, from, COMMAND_LINE_SIZE);