1/* SPDX-License-Identifier: GPL-2.0-only */
 2/*
 3 *  arch/arm/include/asm/mach/arch.h
 4 *
 5 *  Copyright (C) 2000 Russell King
 6 */
 7
 8#include <linux/types.h>
 9
10#ifndef __ASSEMBLY__
11#include <linux/reboot.h>
12
13struct tag;
14struct pt_regs;
15struct smp_operations;
16#ifdef CONFIG_SMP
17#define smp_ops(ops) (&(ops))
18#define smp_init_ops(ops) (&(ops))
19#else
20#define smp_ops(ops) (struct smp_operations *)NULL
21#define smp_init_ops(ops) (bool (*)(void))NULL
22#endif
23
24struct machine_desc {
25	unsigned int		nr;		/* architecture number	*/
26	const char		*name;		/* architecture name	*/
27	unsigned long		atag_offset;	/* tagged list (relative) */
28	const char *const 	*dt_compat;	/* array of device tree
29						 * 'compatible' strings	*/
30
31	unsigned int		nr_irqs;	/* number of IRQs */
32
33#ifdef CONFIG_ZONE_DMA
34	phys_addr_t		dma_zone_size;	/* size of DMA-able area */
35#endif
36
37	unsigned int		video_start;	/* start of video RAM	*/
38	unsigned int		video_end;	/* end of video RAM	*/
39
40	unsigned char		reserve_lp0 :1;	/* never has lp0	*/
41	unsigned char		reserve_lp1 :1;	/* never has lp1	*/
42	unsigned char		reserve_lp2 :1;	/* never has lp2	*/
43	enum reboot_mode	reboot_mode;	/* default restart mode	*/
44	unsigned		l2c_aux_val;	/* L2 cache aux value	*/
45	unsigned		l2c_aux_mask;	/* L2 cache aux mask	*/
46	void			(*l2c_write_sec)(unsigned long, unsigned);
47	const struct smp_operations	*smp;	/* SMP operations	*/
48	bool			(*smp_init)(void);
49	void			(*fixup)(struct tag *, char **);
50	void			(*dt_fixup)(void);
51	long long		(*pv_fixup)(void);
52	void			(*reserve)(void);/* reserve mem blocks	*/
53	void			(*map_io)(void);/* IO mapping function	*/
54	void			(*init_early)(void);
55	void			(*init_irq)(void);
56	void			(*init_time)(void);
57	void			(*init_machine)(void);
58	void			(*init_late)(void);
59	void			(*restart)(enum reboot_mode, const char *);
60};
61
62/*
63 * Current machine - only accessible during boot.
64 */
65extern const struct machine_desc *machine_desc;
66
67/*
68 * Machine type table - also only accessible during boot
69 */
70extern const struct machine_desc __arch_info_begin[], __arch_info_end[];
71#define for_each_machine_desc(p)			\
72	for (p = __arch_info_begin; p < __arch_info_end; p++)
73
74/*
75 * Set of macros to define architecture features.  This is built into
76 * a table by the linker.
77 */
78#define MACHINE_START(_type,_name)			\
79static const struct machine_desc __mach_desc_##_type	\
80 __used							\
81 __section(".arch.info.init") = {			\
82	.nr		= MACH_TYPE_##_type,		\
83	.name		= _name,
84
85#define MACHINE_END				\
86};
87
88#define DT_MACHINE_START(_name, _namestr)		\
89static const struct machine_desc __mach_desc_##_name	\
90 __used							\
91 __section(".arch.info.init") = {			\
92	.nr		= ~0,				\
93	.name		= _namestr,
94
95#endif