/* SPDX-License-Identifier: GPL-2.0-only */ /* * Copyright (C) 2012 Synopsys, Inc. (www.synopsys.com) * * based on METAG mach/arch.h (which in turn was based on ARM) */ #ifndef _ASM_ARC_MACH_DESC_H_ #define _ASM_ARC_MACH_DESC_H_ /** * struct machine_desc - Board specific callbacks, called from ARC common code * Provided by each ARC board using MACHINE_START()/MACHINE_END(), so * a multi-platform kernel builds with array of such descriptors. * We extend the early DT scan to also match the DT's "compatible" string * against the @dt_compat of all such descriptors, and one with highest * "DT score" is selected as global @machine_desc. * * @name: Board/SoC name * @dt_compat: Array of device tree 'compatible' strings * (XXX: although only 1st entry is looked at) * @init_early: Very early callback [called from setup_arch()] * @init_per_cpu: for each CPU as it is coming up (SMP as well as UP) * [(M):init_IRQ(), (o):start_kernel_secondary()] * @init_machine: arch initcall level callback (e.g. populate static * platform devices or parse Devicetree) * @init_late: Late initcall level callback * */ struct machine_desc { const char *name; const char **dt_compat; void (*init_early)(void); void (*init_per_cpu)(unsigned int); void (*init_machine)(void); void (*init_late)(void); }; /* * Current machine - only accessible during boot. */ extern const struct machine_desc *machine_desc; /* * Machine type table - also only accessible during boot */ extern const struct machine_desc __arch_info_begin[], __arch_info_end[]; /* * Set of macros to define architecture features. * This is built into a table by the linker. */ #define MACHINE_START(_type, _name) \ static const struct machine_desc __mach_desc_##_type \ __used \ __attribute__((__section__(".arch.info.init"))) = { \ .name = _name, #define MACHINE_END \ }; extern const struct machine_desc *setup_machine_fdt(void *dt); #endif