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
  18 struct machine_desc {
  19         unsigned int            nr;             /* architecture number  */
  20         const char              *name;          /* architecture name    */
  21         unsigned long           atag_offset;    /* tagged list (relative) */
  22         const char *const       *dt_compat;     /* array of device tree
  23                                                  * 'compatible' strings */
  24
  25         unsigned int            nr_irqs;        /* number of IRQs */
  26
  27 #ifdef CONFIG_ZONE_DMA
  28         unsigned long           dma_zone_size;  /* size of DMA-able area */
  29 #endif
  30
  31         unsigned int            video_start;    /* start of video RAM   */
  32         unsigned int            video_end;      /* end of video RAM     */
  33
  34         unsigned char           reserve_lp0 :1; /* never has lp0        */
  35         unsigned char           reserve_lp1 :1; /* never has lp1        */
  36         unsigned char           reserve_lp2 :1; /* never has lp2        */
  37         char                    restart_mode;   /* default restart mode */
  38         void                    (*fixup)(struct tag *, char **,
  39                                          struct meminfo *);
  40         void                    (*reserve)(void);/* reserve mem blocks  */
  41         void                    (*map_io)(void);/* IO mapping function  */
  42         void                    (*init_early)(void);
  43         void                    (*init_irq)(void);
  44         struct sys_timer        *timer;         /* system tick timer    */
  45         void                    (*init_machine)(void);
  46 #ifdef CONFIG_MULTI_IRQ_HANDLER
  47         void                    (*handle_irq)(struct pt_regs *);
  48 #endif
  49         void                    (*restart)(char, const char *);
  50 };
  51
  52 /*
  53  * Current machine - only accessible during boot.
  54  */
  55 extern struct machine_desc *machine_desc;
  56
  57 /*
  58  * Machine type table - also only accessible during boot
  59  */
  60 extern struct machine_desc __arch_info_begin[], __arch_info_end[];
  61 #define for_each_machine_desc(p)                        \
  62         for (p = __arch_info_begin; p < __arch_info_end; p++)
  63
  64 /*
  65  * Set of macros to define architecture features.  This is built into
  66  * a table by the linker.
  67  */
  68 #define MACHINE_START(_type,_name)                      \
  69 static const struct machine_desc __mach_desc_##_type    \
  70  __used                                                 \
  71  __attribute__((__section__(".arch.info.init"))) = {    \
  72         .nr             = MACH_TYPE_##_type,            \
  73         .name           = _name,
  74
  75 #define MACHINE_END                             \
  76 };
  77
  78 #define DT_MACHINE_START(_name, _namestr)               \
  79 static const struct machine_desc __mach_desc_##_name    \
  80  __used                                                 \
  81  __attribute__((__section__(".arch.info.init"))) = {    \
  82         .nr             = ~0,                           \
  83         .name           = _namestr,
  84
  85 #endif