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03a6d28c VG |
1 | /* |
2 | * Copyright (C) 2012 Synopsys, Inc. (www.synopsys.com) | |
3 | * | |
4 | * based on METAG mach/arch.h (which in turn was based on ARM) | |
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 | #ifndef _ASM_ARC_MACH_DESC_H_ | |
12 | #define _ASM_ARC_MACH_DESC_H_ | |
13 | ||
14 | /** | |
15 | * struct machine_desc - Board specific callbacks, called from ARC common code | |
16 | * Provided by each ARC board using MACHINE_START()/MACHINE_END(), so | |
17 | * a multi-platform kernel builds with array of such descriptors. | |
18 | * We extend the early DT scan to also match the DT's "compatible" string | |
19 | * against the @dt_compat of all such descriptors, and one with highest | |
20 | * "DT score" is selected as global @machine_desc. | |
21 | * | |
22 | * @name: Board/SoC name | |
23 | * @dt_compat: Array of device tree 'compatible' strings | |
24 | * (XXX: although only 1st entry is looked at) | |
25 | * @init_early: Very early callback [called from setup_arch()] | |
26 | * @init_irq: setup external IRQ controllers [called from init_IRQ()] | |
27 | * @init_smp: for each CPU (e.g. setup IPI) | |
28 | * [(M):init_IRQ(), (o):start_kernel_secondary()] | |
29 | * @init_time: platform specific clocksource/clockevent registration | |
30 | * [called from time_init()] | |
31 | * @init_machine: arch initcall level callback (e.g. populate static | |
32 | * platform devices or parse Devicetree) | |
33 | * @init_late: Late initcall level callback | |
34 | * | |
35 | */ | |
36 | struct machine_desc { | |
37 | const char *name; | |
38 | const char **dt_compat; | |
39 | ||
40 | void (*init_early)(void); | |
41 | void (*init_irq)(void); | |
42 | #ifdef CONFIG_SMP | |
43 | void (*init_smp)(unsigned int); | |
44 | #endif | |
45 | void (*init_time)(void); | |
46 | void (*init_machine)(void); | |
47 | void (*init_late)(void); | |
48 | ||
49 | }; | |
50 | ||
51 | /* | |
52 | * Current machine - only accessible during boot. | |
53 | */ | |
54 | extern struct machine_desc *machine_desc; | |
55 | ||
56 | /* | |
57 | * Machine type table - also only accessible during boot | |
58 | */ | |
59 | extern struct machine_desc __arch_info_begin[], __arch_info_end[]; | |
60 | #define for_each_machine_desc(p) \ | |
61 | for (p = __arch_info_begin; p < __arch_info_end; p++) | |
62 | ||
63 | static inline struct machine_desc *default_machine_desc(void) | |
64 | { | |
65 | /* the default machine is the last one linked in */ | |
66 | if (__arch_info_end - 1 < __arch_info_begin) | |
67 | return NULL; | |
68 | return __arch_info_end - 1; | |
69 | } | |
70 | ||
71 | /* | |
72 | * Set of macros to define architecture features. | |
73 | * This is built into a table by the linker. | |
74 | */ | |
75 | #define MACHINE_START(_type, _name) \ | |
76 | static const struct machine_desc __mach_desc_##_type \ | |
77 | __used \ | |
78 | __attribute__((__section__(".arch.info.init"))) = { \ | |
79 | .name = _name, | |
80 | ||
81 | #define MACHINE_END \ | |
82 | }; | |
83 | ||
84 | extern struct machine_desc *setup_machine_fdt(void *dt); | |
eab6a08c | 85 | |
03a6d28c | 86 | #endif |