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85d9d7a9 JH |
1 | /* |
2 | * arch/metag/include/asm/mach/arch.h | |
3 | * | |
4 | * Copyright (C) 2012 Imagination Technologies Ltd. | |
5 | * | |
6 | * based on the ARM version: | |
7 | * Copyright (C) 2000 Russell King | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 as | |
11 | * published by the Free Software Foundation. | |
12 | */ | |
13 | ||
14 | #ifndef _METAG_MACH_ARCH_H_ | |
15 | #define _METAG_MACH_ARCH_H_ | |
16 | ||
17 | #include <linux/stddef.h> | |
18 | ||
a2c5d4ed JH |
19 | #include <asm/clock.h> |
20 | ||
85d9d7a9 JH |
21 | /** |
22 | * struct machine_desc - Describes a board controlled by a Meta. | |
23 | * @name: Board/SoC name. | |
24 | * @dt_compat: Array of device tree 'compatible' strings. | |
a2c5d4ed | 25 | * @clocks: Clock callbacks. |
85d9d7a9 JH |
26 | * |
27 | * @nr_irqs: Maximum number of IRQs. | |
28 | * If 0, defaults to NR_IRQS in asm-generic/irq.h. | |
29 | * | |
30 | * @init_early: Early init callback. | |
31 | * @init_irq: IRQ init callback for setting up IRQ controllers. | |
32 | * @init_machine: Arch init callback for setting up devices. | |
33 | * @init_late: Late init callback. | |
34 | * | |
35 | * This structure is provided by each board which can be controlled by a Meta. | |
36 | * It is chosen by matching the compatible strings in the device tree provided | |
37 | * by the bootloader with the strings in @dt_compat, and sets up any aspects of | |
38 | * the machine that aren't configured with device tree (yet). | |
39 | */ | |
40 | struct machine_desc { | |
41 | const char *name; | |
42 | const char **dt_compat; | |
a2c5d4ed | 43 | struct meta_clock_desc *clocks; |
85d9d7a9 JH |
44 | |
45 | unsigned int nr_irqs; | |
46 | ||
47 | void (*init_early)(void); | |
48 | void (*init_irq)(void); | |
49 | void (*init_machine)(void); | |
50 | void (*init_late)(void); | |
51 | }; | |
52 | ||
53 | /* | |
54 | * Current machine - only accessible during boot. | |
55 | */ | |
986c494b | 56 | extern const struct machine_desc *machine_desc; |
85d9d7a9 JH |
57 | |
58 | /* | |
59 | * Machine type table - also only accessible during boot | |
60 | */ | |
61 | extern struct machine_desc __arch_info_begin[], __arch_info_end[]; | |
62 | #define for_each_machine_desc(p) \ | |
63 | for (p = __arch_info_begin; p < __arch_info_end; p++) | |
64 | ||
65 | static inline struct machine_desc *default_machine_desc(void) | |
66 | { | |
67 | /* the default machine is the last one linked in */ | |
68 | if (__arch_info_end - 1 < __arch_info_begin) | |
69 | return NULL; | |
70 | return __arch_info_end - 1; | |
71 | } | |
72 | ||
73 | /* | |
74 | * Set of macros to define architecture features. This is built into | |
75 | * a table by the linker. | |
76 | */ | |
77 | #define MACHINE_START(_type, _name) \ | |
78 | static const struct machine_desc __mach_desc_##_type \ | |
79 | __used \ | |
80 | __attribute__((__section__(".arch.info.init"))) = { \ | |
81 | .name = _name, | |
82 | ||
83 | #define MACHINE_END \ | |
84 | }; | |
85 | ||
86 | #endif /* _METAG_MACH_ARCH_H_ */ |