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