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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 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         const struct smp_operations     *smp;   /* SMP operations       */
51         bool                    (*smp_init)(void);
52         void                    (*fixup)(struct tag *, char **);
53         void                    (*dt_fixup)(void);
54         long long               (*pv_fixup)(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