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Linux/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 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         phys_addr_t             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         enum reboot_mode        reboot_mode;    /* default restart mode */
 47         unsigned                l2c_aux_val;    /* L2 cache aux value   */
 48         unsigned                l2c_aux_mask;   /* L2 cache aux mask    */
 49         void                    (*l2c_write_sec)(unsigned long, unsigned);
 50         struct smp_operations   *smp;           /* SMP operations       */
 51         bool                    (*smp_init)(void);
 52         void                    (*fixup)(struct tag *, char **);
 53         void                    (*dt_fixup)(void);
 54         void                    (*init_meminfo)(void);
 55         void                    (*reserve)(void);/* reserve mem blocks  */
 56         void                    (*map_io)(void);/* IO mapping function  */
 57         void                    (*init_early)(void);
 58         void                    (*init_irq)(void);
 59         void                    (*init_time)(void);
 60         void                    (*init_machine)(void);
 61         void                    (*init_late)(void);
 62 #ifdef CONFIG_MULTI_IRQ_HANDLER
 63         void                    (*handle_irq)(struct pt_regs *);
 64 #endif
 65         void                    (*restart)(enum reboot_mode, const char *);
 66 };
 67 
 68 /*
 69  * Current machine - only accessible during boot.
 70  */
 71 extern const struct machine_desc *machine_desc;
 72 
 73 /*
 74  * Machine type table - also only accessible during boot
 75  */
 76 extern const struct machine_desc __arch_info_begin[], __arch_info_end[];
 77 #define for_each_machine_desc(p)                        \
 78         for (p = __arch_info_begin; p < __arch_info_end; p++)
 79 
 80 /*
 81  * Set of macros to define architecture features.  This is built into
 82  * a table by the linker.
 83  */
 84 #define MACHINE_START(_type,_name)                      \
 85 static const struct machine_desc __mach_desc_##_type    \
 86  __used                                                 \
 87  __attribute__((__section__(".arch.info.init"))) = {    \
 88         .nr             = MACH_TYPE_##_type,            \
 89         .name           = _name,
 90 
 91 #define MACHINE_END                             \
 92 };
 93 
 94 #define DT_MACHINE_START(_name, _namestr)               \
 95 static const struct machine_desc __mach_desc_##_name    \
 96  __used                                                 \
 97  __attribute__((__section__(".arch.info.init"))) = {    \
 98         .nr             = ~0,                           \
 99         .name           = _namestr,
100 
101 #endif
102 

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