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__ */ 64