mach_desc.h (1943B)
1/* SPDX-License-Identifier: GPL-2.0-only */ 2/* 3 * Copyright (C) 2012 Synopsys, Inc. (www.synopsys.com) 4 * 5 * based on METAG mach/arch.h (which in turn was based on ARM) 6 */ 7 8#ifndef _ASM_ARC_MACH_DESC_H_ 9#define _ASM_ARC_MACH_DESC_H_ 10 11/** 12 * struct machine_desc - Board specific callbacks, called from ARC common code 13 * Provided by each ARC board using MACHINE_START()/MACHINE_END(), so 14 * a multi-platform kernel builds with array of such descriptors. 15 * We extend the early DT scan to also match the DT's "compatible" string 16 * against the @dt_compat of all such descriptors, and one with highest 17 * "DT score" is selected as global @machine_desc. 18 * 19 * @name: Board/SoC name 20 * @dt_compat: Array of device tree 'compatible' strings 21 * (XXX: although only 1st entry is looked at) 22 * @init_early: Very early callback [called from setup_arch()] 23 * @init_per_cpu: for each CPU as it is coming up (SMP as well as UP) 24 * [(M):init_IRQ(), (o):start_kernel_secondary()] 25 * @init_machine: arch initcall level callback (e.g. populate static 26 * platform devices or parse Devicetree) 27 * @init_late: Late initcall level callback 28 * 29 */ 30struct machine_desc { 31 const char *name; 32 const char **dt_compat; 33 void (*init_early)(void); 34 void (*init_per_cpu)(unsigned int); 35 void (*init_machine)(void); 36 void (*init_late)(void); 37 38}; 39 40/* 41 * Current machine - only accessible during boot. 42 */ 43extern const struct machine_desc *machine_desc; 44 45/* 46 * Machine type table - also only accessible during boot 47 */ 48extern const struct machine_desc __arch_info_begin[], __arch_info_end[]; 49 50/* 51 * Set of macros to define architecture features. 52 * This is built into a table by the linker. 53 */ 54#define MACHINE_START(_type, _name) \ 55static const struct machine_desc __mach_desc_##_type \ 56__used __section(".arch.info.init") = { \ 57 .name = _name, 58 59#define MACHINE_END \ 60}; 61 62extern const struct machine_desc *setup_machine_fdt(void *dt); 63 64#endif