| 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 |