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 #include <linux/types.h>
  12
  13 #ifndef __ASSEMBLY__
  14
  15 struct tag;
  16 struct meminfo;
  17 struct pt_regs;
  18 struct smp_operations;
  19 #ifdef CONFIG_SMP
  20 #define smp_ops(ops) (&(ops))
  21 #define smp_init_ops(ops) (&(ops))
  22 #else
  23 #define smp_ops(ops) (struct smp_operations *)NULL
  24 #define smp_init_ops(ops) (bool (*)(void))NULL
  25 #endif
  26
  27 struct machine_desc {
  28         unsigned int            nr;             /* architecture number  */
  29         const char              *name;          /* architecture name    */
  30         unsigned long           atag_offset;    /* tagged list (relative) */
  31         const char *const       *dt_compat;     /* array of device tree
  32                                                  * 'compatible' strings */
  33
  34         unsigned int            nr_irqs;        /* number of IRQs */
  35
  36 #ifdef CONFIG_ZONE_DMA
  37         unsigned long           dma_zone_size;  /* size of DMA-able area */
  38 #endif
  39
  40         unsigned int            video_start;    /* start of video RAM   */
  41         unsigned int            video_end;      /* end of video RAM     */
  42
  43         unsigned char           reserve_lp0 :1; /* never has lp0        */
  44         unsigned char           reserve_lp1 :1; /* never has lp1        */
  45         unsigned char           reserve_lp2 :1; /* never has lp2        */
  46         char                    restart_mode;   /* default restart mode */
  47         struct smp_operations   *smp;           /* SMP operations       */
  48         bool                    (*smp_init)(void);
  49         void                    (*fixup)(struct tag *, char **,
  50                                          struct meminfo *);
  51         void                    (*reserve)(void);/* reserve mem blocks  */
  52         void                    (*map_io)(void);/* IO mapping function  */
  53         void                    (*init_early)(void);
  54         void                    (*init_irq)(void);
  55         void                    (*init_time)(void);
  56         void                    (*init_machine)(void);
  57         void                    (*init_late)(void);
  58 #ifdef CONFIG_MULTI_IRQ_HANDLER
  59         void                    (*handle_irq)(struct pt_regs *);
  60 #endif
  61         void                    (*restart)(char, const char *);
  62 };
  63
  64 /*
  65  * Current machine - only accessible during boot.
  66  */
  67 extern struct machine_desc *machine_desc;
  68
  69 /*
  70  * Machine type table - also only accessible during boot
  71  */
  72 extern struct machine_desc __arch_info_begin[], __arch_info_end[];
  73 #define for_each_machine_desc(p)                        \
  74         for (p = __arch_info_begin; p < __arch_info_end; p++)
  75
  76 /*
  77  * Set of macros to define architecture features.  This is built into
  78  * a table by the linker.
  79  */
  80 #define MACHINE_START(_type,_name)                      \
  81 static const struct machine_desc __mach_desc_##_type    \
  82  __used                                                 \
  83  __attribute__((__section__(".arch.info.init"))) = {    \
  84         .nr             = MACH_TYPE_##_type,            \
  85         .name           = _name,
  86
  87 #define MACHINE_END                             \
  88 };
  89
  90 #define DT_MACHINE_START(_name, _namestr)               \
  91 static const struct machine_desc __mach_desc_##_name    \
  92  __used                                                 \
  93  __attribute__((__section__(".arch.info.init"))) = {    \
  94         .nr             = ~0,                           \
  95         .name           = _namestr,
  96
  97 #endif