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 #ifndef __ASSEMBLY__ 12 13 struct tag; 14 struct meminfo; 15 struct sys_timer; 16 struct pt_regs; 17 struct smp_operations; 18 #ifdef CONFIG_SMP 19 #define smp_ops(ops) (&(ops)) 20 #else 21 #define smp_ops(ops) (struct smp_operations *)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 unsigned long 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 char restart_mode; /* default restart mode */ 44 struct smp_operations *smp; /* SMP operations */ 45 void (*fixup)(struct tag *, char **, 46 struct meminfo *); 47 void (*reserve)(void);/* reserve mem blocks */ 48 void (*map_io)(void);/* IO mapping function */ 49 void (*init_early)(void); 50 void (*init_irq)(void); 51 struct sys_timer *timer; /* system tick timer */ 52 void (*init_machine)(void); 53 void (*init_late)(void); 54 #ifdef CONFIG_MULTI_IRQ_HANDLER 55 void (*handle_irq)(struct pt_regs *); 56 #endif 57 void (*restart)(char, const char *); 58 }; 59 60 /* 61 * Current machine - only accessible during boot. 62 */ 63 extern struct machine_desc *machine_desc; 64 65 /* 66 * Machine type table - also only accessible during boot 67 */ 68 extern struct machine_desc __arch_info_begin[], __arch_info_end[]; 69 #define for_each_machine_desc(p) \ 70 for (p = __arch_info_begin; p < __arch_info_end; p++) 71 72 /* 73 * Set of macros to define architecture features. This is built into 74 * a table by the linker. 75 */ 76 #define MACHINE_START(_type,_name) \ 77 static const struct machine_desc __mach_desc_##_type \ 78 __used \ 79 __attribute__((__section__(".arch.info.init"))) = { \ 80 .nr = MACH_TYPE_##_type, \ 81 .name = _name, 82 83 #define MACHINE_END \ 84 }; 85 86 #define DT_MACHINE_START(_name, _namestr) \ 87 static const struct machine_desc __mach_desc_##_name \ 88 __used \ 89 __attribute__((__section__(".arch.info.init"))) = { \ 90 .nr = ~0, \ 91 .name = _namestr, 92 93 #endif 94