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 #include <linux/reboot.h>
  15
  16 struct tag;
  17 struct meminfo;
  18 struct pt_regs;
  19 struct smp_operations;
  20 #ifdef CONFIG_SMP
  21 #define smp_ops(ops) (&(ops))
  22 #define smp_init_ops(ops) (&(ops))
  23 #else
  24 #define smp_ops(ops) (struct smp_operations *)NULL
  25 #define smp_init_ops(ops) (bool (*)(void))NULL
  26 #endif
  27
  28 struct machine_desc {
  29         unsigned int            nr;             /* architecture number  */
  30         const char              *name;          /* architecture name    */
  31         unsigned long           atag_offset;    /* tagged list (relative) */
  32         const char *const       *dt_compat;     /* array of device tree
  33                                                  * 'compatible' strings */
  34
  35         unsigned int            nr_irqs;        /* number of IRQs */
  36
  37 #ifdef CONFIG_ZONE_DMA
  38         phys_addr_t             dma_zone_size;  /* size of DMA-able area */
  39 #endif
  40
  41         unsigned int            video_start;    /* start of video RAM   */
  42         unsigned int            video_end;      /* end of video RAM     */
  43
  44         unsigned char           reserve_lp0 :1; /* never has lp0        */
  45         unsigned char           reserve_lp1 :1; /* never has lp1        */
  46         unsigned char           reserve_lp2 :1; /* never has lp2        */
  47         enum reboot_mode        reboot_mode;    /* default restart mode */
  48         unsigned                l2c_aux_val;    /* L2 cache aux value   */
  49         unsigned                l2c_aux_mask;   /* L2 cache aux mask    */
  50         void                    (*l2c_write_sec)(unsigned long, unsigned);
  51         struct smp_operations   *smp;           /* SMP operations       */
  52         bool                    (*smp_init)(void);
  53         void                    (*fixup)(struct tag *, char **,
  54                                          struct meminfo *);
  55         void                    (*init_meminfo)(void);
  56         void                    (*reserve)(void);/* reserve mem blocks  */
  57         void                    (*map_io)(void);/* IO mapping function  */
  58         void                    (*init_early)(void);
  59         void                    (*init_irq)(void);
  60         void                    (*init_time)(void);
  61         void                    (*init_machine)(void);
  62         void                    (*init_late)(void);
  63 #ifdef CONFIG_MULTI_IRQ_HANDLER
  64         void                    (*handle_irq)(struct pt_regs *);
  65 #endif
  66         void                    (*restart)(enum reboot_mode, const char *);
  67 };
  68
  69 /*
  70  * Current machine - only accessible during boot.
  71  */
  72 extern const struct machine_desc *machine_desc;
  73
  74 /*
  75  * Machine type table - also only accessible during boot
  76  */
  77 extern const struct machine_desc __arch_info_begin[], __arch_info_end[];
  78 #define for_each_machine_desc(p)                        \
  79         for (p = __arch_info_begin; p < __arch_info_end; p++)
  80
  81 /*
  82  * Set of macros to define architecture features.  This is built into
  83  * a table by the linker.
  84  */
  85 #define MACHINE_START(_type,_name)                      \
  86 static const struct machine_desc __mach_desc_##_type    \
  87  __used                                                 \
  88  __attribute__((__section__(".arch.info.init"))) = {    \
  89         .nr             = MACH_TYPE_##_type,            \
  90         .name           = _name,
  91
  92 #define MACHINE_END                             \
  93 };
  94
  95 #define DT_MACHINE_START(_name, _namestr)               \
  96 static const struct machine_desc __mach_desc_##_name    \
  97  __used                                                 \
  98  __attribute__((__section__(".arch.info.init"))) = {    \
  99         .nr             = ~0,                           \
 100         .name           = _namestr,
 101
 102 #endif