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_per_cpu: for each CPU as it is coming up (SMP as well as UP) 27 * [(M):init_IRQ(), (o):start_kernel_secondary()] 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; 36 void (*init_early)(void); 37 #ifdef CONFIG_SMP 38 void (*init_per_cpu)(unsigned int); 39 #endif 40 void (*init_machine)(void); 41 void (*init_late)(void); 42 43 }; 44 45 /* 46 * Current machine - only accessible during boot. 47 */ 48 extern const struct machine_desc *machine_desc; 49 50 /* 51 * Machine type table - also only accessible during boot 52 */ 53 extern const struct machine_desc __arch_info_begin[], __arch_info_end[]; 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 68 extern const struct machine_desc *setup_machine_fdt(void *dt); 69 70 #endif 71