1/*
2 *  arch/arm/include/asm/mach/arch.h
3 *
4 *  Copyright (C) 2000 Russell King
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#include <linux/types.h>
12
13#ifndef __ASSEMBLY__
14#include <linux/reboot.h>
15
16struct tag;
17struct pt_regs;
18struct smp_operations;
19#ifdef CONFIG_SMP
20#define smp_ops(ops) (&(ops))
21#define smp_init_ops(ops) (&(ops))
22#else
23#define smp_ops(ops) (struct smp_operations *)NULL
24#define smp_init_ops(ops) (bool (*)(void))NULL
25#endif
26
27struct machine_desc {
28	unsigned int		nr;		/* architecture number	*/
29	const char		*name;		/* architecture name	*/
30	unsigned long		atag_offset;	/* tagged list (relative) */
31	const char *const 	*dt_compat;	/* array of device tree
32						 * 'compatible' strings	*/
33
34	unsigned int		nr_irqs;	/* number of IRQs */
35
36#ifdef CONFIG_ZONE_DMA
37	phys_addr_t		dma_zone_size;	/* size of DMA-able area */
38#endif
39
40	unsigned int		video_start;	/* start of video RAM	*/
41	unsigned int		video_end;	/* end of video RAM	*/
42
43	unsigned char		reserve_lp0 :1;	/* never has lp0	*/
44	unsigned char		reserve_lp1 :1;	/* never has lp1	*/
45	unsigned char		reserve_lp2 :1;	/* never has lp2	*/
46	enum reboot_mode	reboot_mode;	/* default restart mode	*/
47	unsigned		l2c_aux_val;	/* L2 cache aux value	*/
48	unsigned		l2c_aux_mask;	/* L2 cache aux mask	*/
49	void			(*l2c_write_sec)(unsigned long, unsigned);
50	struct smp_operations	*smp;		/* SMP operations	*/
51	bool			(*smp_init)(void);
52	void			(*fixup)(struct tag *, char **);
53	void			(*dt_fixup)(void);
54	void			(*init_meminfo)(void);
55	void			(*reserve)(void);/* reserve mem blocks	*/
56	void			(*map_io)(void);/* IO mapping function	*/
57	void			(*init_early)(void);
58	void			(*init_irq)(void);
59	void			(*init_time)(void);
60	void			(*init_machine)(void);
61	void			(*init_late)(void);
62#ifdef CONFIG_MULTI_IRQ_HANDLER
63	void			(*handle_irq)(struct pt_regs *);
64#endif
65	void			(*restart)(enum reboot_mode, const char *);
66};
67
68/*
69 * Current machine - only accessible during boot.
70 */
71extern const struct machine_desc *machine_desc;
72
73/*
74 * Machine type table - also only accessible during boot
75 */
76extern const struct machine_desc __arch_info_begin[], __arch_info_end[];
77#define for_each_machine_desc(p)			\
78	for (p = __arch_info_begin; p < __arch_info_end; p++)
79
80/*
81 * Set of macros to define architecture features.  This is built into
82 * a table by the linker.
83 */
84#define MACHINE_START(_type,_name)			\
85static const struct machine_desc __mach_desc_##_type	\
86 __used							\
87 __attribute__((__section__(".arch.info.init"))) = {	\
88	.nr		= MACH_TYPE_##_type,		\
89	.name		= _name,
90
91#define MACHINE_END				\
92};
93
94#define DT_MACHINE_START(_name, _namestr)		\
95static const struct machine_desc __mach_desc_##_name	\
96 __used							\
97 __attribute__((__section__(".arch.info.init"))) = {	\
98	.nr		= ~0,				\
99	.name		= _namestr,
100
101#endif
102