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
13 struct tag;
14 struct pt_regs;
15 struct 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
24 struct 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 */
65 extern const struct machine_desc *machine_desc;
66
67 /*
68 * Machine type table - also only accessible during boot
69 */
70 extern 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) \
79 static 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) \
89 static const struct machine_desc __mach_desc_##_name \
90 __used \
91 __section(".arch.info.init") = { \
92 .nr = ~0, \
93 .name = _namestr,
94
95 #endif
96
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