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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()] | |
8721a7f5 | 26 | * @init_cpu_smp: for each CPU as it is coming up (SMP as well as UP) |
03a6d28c | 27 | * [(M):init_IRQ(), (o):start_kernel_secondary()] |
03a6d28c VG |
28 | * @init_machine: arch initcall level callback (e.g. populate static |
29 | * platform devices or parse Devicetree) | |
30 | * @init_late: Late initcall level callback | |
31 | * | |
32 | */ | |
33 | struct machine_desc { | |
34 | const char *name; | |
35 | const char **dt_compat; | |
03a6d28c | 36 | void (*init_early)(void); |
03a6d28c | 37 | #ifdef CONFIG_SMP |
8721a7f5 | 38 | void (*init_cpu_smp)(unsigned int); |
03a6d28c | 39 | #endif |
03a6d28c VG |
40 | void (*init_machine)(void); |
41 | void (*init_late)(void); | |
42 | ||
43 | }; | |
44 | ||
45 | /* | |
46 | * Current machine - only accessible during boot. | |
47 | */ | |
880beb88 | 48 | extern const struct machine_desc *machine_desc; |
03a6d28c VG |
49 | |
50 | /* | |
51 | * Machine type table - also only accessible during boot | |
52 | */ | |
880beb88 | 53 | extern const struct machine_desc __arch_info_begin[], __arch_info_end[]; |
03a6d28c VG |
54 | |
55 | /* | |
56 | * Set of macros to define architecture features. | |
57 | * This is built into a table by the linker. | |
58 | */ | |
59 | #define MACHINE_START(_type, _name) \ | |
60 | static const struct machine_desc __mach_desc_##_type \ | |
61 | __used \ | |
62 | __attribute__((__section__(".arch.info.init"))) = { \ | |
63 | .name = _name, | |
64 | ||
65 | #define MACHINE_END \ | |
66 | }; | |
67 | ||
880beb88 | 68 | extern const struct machine_desc *setup_machine_fdt(void *dt); |
eab6a08c | 69 | |
03a6d28c | 70 | #endif |