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