arch.h

Go to the documentation of this file.

/*
 *  arch/arm/include/asm/mach/arch.h
 *
 *  Copyright (C) 2000 Russell King
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#ifndef __ASSEMBLY__

struct tag;
struct meminfo;
struct sys_timer;
struct pt_regs;
struct smp_operations;
#ifdef CONFIG_SMP
#define smp_ops(ops) (&(ops))
#else
#define smp_ops(ops) (struct smp_operations *)NULL
#endif

struct machine_desc {
    unsigned int        nr;     /* architecture number  */
    const char      *name;      /* architecture name    */
    unsigned long       atag_offset;    /* tagged list (relative) */
    const char *const   *dt_compat; /* array of device tree
                         * 'compatible' strings */

    unsigned int        nr_irqs;    /* number of IRQs */

#ifdef CONFIG_ZONE_DMA
    unsigned long       dma_zone_size;  /* size of DMA-able area */
#endif

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

    unsigned char       reserve_lp0 :1; /* never has lp0    */
    unsigned char       reserve_lp1 :1; /* never has lp1    */
    unsigned char       reserve_lp2 :1; /* never has lp2    */
    char            restart_mode;   /* default restart mode */
    struct smp_operations   *smp;       /* SMP operations   */
    void            (*fixup)(struct tag *, char **,
                     struct meminfo *);
    void            (*reserve)(void);/* reserve mem blocks  */
    void            (*map_io)(void);/* IO mapping function  */
    void            (*init_early)(void);
    void            (*init_irq)(void);
    struct sys_timer    *timer;     /* system tick timer    */
    void            (*init_machine)(void);
    void            (*init_late)(void);
#ifdef CONFIG_MULTI_IRQ_HANDLER
    void            (*handle_irq)(struct pt_regs *);
#endif
    void            (*restart)(char, const char *);
};

/*
 * Current machine - only accessible during boot.
 */
extern struct machine_desc *machine_desc;

/*
 * Machine type table - also only accessible during boot
 */
extern struct machine_desc __arch_info_begin[], __arch_info_end[];
#define for_each_machine_desc(p)            \
    for (p = __arch_info_begin; p < __arch_info_end; p++)

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

#define MACHINE_END             \
};

#define DT_MACHINE_START(_name, _namestr)       \
static const struct machine_desc __mach_desc_##_name    \
 __used                         \
 __attribute__((__section__(".arch.info.init"))) = {    \
    .nr     = ~0,               \
    .name       = _namestr,

#endif