xref: /openbmc/linux/arch/arm/include/asm/mach/arch.h (revision a2cce7a9)
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 
16 struct tag;
17 struct pt_regs;
18 struct 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 
27 struct 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 	long long		(*pv_fixup)(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  */
71 extern const struct machine_desc *machine_desc;
72 
73 /*
74  * Machine type table - also only accessible during boot
75  */
76 extern 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)			\
85 static 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)		\
95 static 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