arch/arm/include/asm/mach/arch.h

   1 /*
   2  *  arch/arm/include/asm/mach/arch.h
   3  *
   4  *  Copyright (C) 2000 Russell King
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10
  11 #ifndef __ASSEMBLY__
  12
  13 struct tag;
  14 struct meminfo;
  15 struct sys_timer;
  16 struct pt_regs;
  17 struct smp_operations;
  18 #ifdef CONFIG_SMP
  19 #define smp_ops(ops) (&(ops))
  20 #else
  21 #define smp_ops(ops) (struct smp_operations *)NULL
  22 #endif
  23
  24 struct machine_desc {
  25         unsigned int            nr;             /* architecture number  */
  26         const char              *name;          /* architecture name    */
  27         unsigned long           atag_offset;    /* tagged list (relative) */
  28         const char *const       *dt_compat;     /* array of device tree
  29                                                  * 'compatible' strings */
  30
  31         unsigned int            nr_irqs;        /* number of IRQs */
  32
  33 #ifdef CONFIG_ZONE_DMA
  34         unsigned long           dma_zone_size;  /* size of DMA-able area */
  35 #endif
  36
  37         unsigned int            video_start;    /* start of video RAM   */
  38         unsigned int            video_end;      /* end of video RAM     */
  39
  40         unsigned char           reserve_lp0 :1; /* never has lp0        */
  41         unsigned char           reserve_lp1 :1; /* never has lp1        */
  42         unsigned char           reserve_lp2 :1; /* never has lp2        */
  43         char                    restart_mode;   /* default restart mode */
  44         struct smp_operations   *smp;           /* SMP operations       */
  45         void                    (*fixup)(struct tag *, char **,
  46                                          struct meminfo *);
  47         void                    (*reserve)(void);/* reserve mem blocks  */
  48         void                    (*map_io)(void);/* IO mapping function  */
  49         void                    (*init_early)(void);
  50         void                    (*init_irq)(void);
  51         struct sys_timer        *timer;         /* system tick timer    */
  52         void                    (*init_machine)(void);
  53         void                    (*init_late)(void);
  54 #ifdef CONFIG_MULTI_IRQ_HANDLER
  55         void                    (*handle_irq)(struct pt_regs *);
  56 #endif
  57         void                    (*restart)(char, const char *);
  58 };
  59
  60 /*
  61  * Current machine - only accessible during boot.
  62  */
  63 extern struct machine_desc *machine_desc;
  64
  65 /*
  66  * Machine type table - also only accessible during boot
  67  */
  68 extern struct machine_desc __arch_info_begin[], __arch_info_end[];
  69 #define for_each_machine_desc(p)                        \
  70         for (p = __arch_info_begin; p < __arch_info_end; p++)
  71
  72 /*
  73  * Set of macros to define architecture features.  This is built into
  74  * a table by the linker.
  75  */
  76 #define MACHINE_START(_type,_name)                      \
  77 static const struct machine_desc __mach_desc_##_type    \
  78  __used                                                 \
  79  __attribute__((__section__(".arch.info.init"))) = {    \
  80         .nr             = MACH_TYPE_##_type,            \
  81         .name           = _name,
  82
  83 #define MACHINE_END                             \
  84 };
  85
  86 #define DT_MACHINE_START(_name, _namestr)               \
  87 static const struct machine_desc __mach_desc_##_name    \
  88  __used                                                 \
  89  __attribute__((__section__(".arch.info.init"))) = {    \
  90         .nr             = ~0,                           \
  91         .name           = _namestr,
  92
  93 #endif