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1 | /* |
2 | * Copyright (C) 2016 Imagination Technologies | |
3 | * Author: Paul Burton <paul.burton@imgtec.com> | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms of the GNU General Public License as published by the | |
7 | * Free Software Foundation; either version 2 of the License, or (at your | |
8 | * option) any later version. | |
9 | */ | |
10 | ||
11 | #ifndef __MIPS_ASM_MACHINE_H__ | |
12 | #define __MIPS_ASM_MACHINE_H__ | |
13 | ||
14 | #include <linux/libfdt.h> | |
15 | #include <linux/of.h> | |
16 | ||
17 | struct mips_machine { | |
18 | const struct of_device_id *matches; | |
19 | const void *fdt; | |
20 | bool (*detect)(void); | |
21 | const void *(*fixup_fdt)(const void *fdt, const void *match_data); | |
22 | unsigned int (*measure_hpt_freq)(void); | |
23 | }; | |
24 | ||
25 | extern long __mips_machines_start; | |
26 | extern long __mips_machines_end; | |
27 | ||
28 | #define MIPS_MACHINE(name) \ | |
29 | static const struct mips_machine __mips_mach_##name \ | |
30 | __used __section(.mips.machines.init) | |
31 | ||
32 | #define for_each_mips_machine(mach) \ | |
33 | for ((mach) = (struct mips_machine *)&__mips_machines_start; \ | |
34 | (mach) < (struct mips_machine *)&__mips_machines_end; \ | |
35 | (mach)++) | |
36 | ||
37 | /** | |
38 | * mips_machine_is_compatible() - check if a machine is compatible with an FDT | |
39 | * @mach: the machine struct to check | |
40 | * @fdt: the FDT to check for compatibility with | |
41 | * | |
42 | * Check whether the given machine @mach is compatible with the given flattened | |
43 | * device tree @fdt, based upon the compatibility property of the root node. | |
44 | * | |
45 | * Return: the device id matched if any, else NULL | |
46 | */ | |
47 | static inline const struct of_device_id * | |
48 | mips_machine_is_compatible(const struct mips_machine *mach, const void *fdt) | |
49 | { | |
50 | const struct of_device_id *match; | |
51 | ||
52 | if (!mach->matches) | |
53 | return NULL; | |
54 | ||
55 | for (match = mach->matches; match->compatible; match++) { | |
56 | if (fdt_node_check_compatible(fdt, 0, match->compatible) == 0) | |
57 | return match; | |
58 | } | |
59 | ||
60 | return NULL; | |
61 | } | |
62 | ||
63 | #endif /* __MIPS_ASM_MACHINE_H__ */ |