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