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 */
30 struct 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 */
43 extern const struct machine_desc *machine_desc;
44
45 /*
46 * Machine type table - also only accessible during boot
47 */
48 extern 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) \
55 static const struct machine_desc __mach_desc_##_type \
56 __used __section(.arch.info.init) = { \
57 .name = _name,
58
59 #define MACHINE_END \
60 };
61
62 extern const struct machine_desc *setup_machine_fdt(void *dt);
63
64 #endif