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 #ifdef CONFIG_MULTI_IRQ_HANDLER 47 void (*handle_irq)(struct pt_regs *); 48 #endif 49 void (*restart)(char, const char *); 50 }; 51 52 /* 53 * Current machine - only accessible during boot. 54 */ 55 extern struct machine_desc *machine_desc; 56 57 /* 58 * Machine type table - also only accessible during boot 59 */ 60 extern struct machine_desc __arch_info_begin[], __arch_info_end[]; 61 #define for_each_machine_desc(p) \ 62 for (p = __arch_info_begin; p < __arch_info_end; p++) 63 64 /* 65 * Set of macros to define architecture features. This is built into 66 * a table by the linker. 67 */ 68 #define MACHINE_START(_type,_name) \ 69 static const struct machine_desc __mach_desc_##_type \ 70 __used \ 71 __attribute__((__section__(".arch.info.init"))) = { \ 72 .nr = MACH_TYPE_##_type, \ 73 .name = _name, 74 75 #define MACHINE_END \ 76 }; 77 78 #define DT_MACHINE_START(_name, _namestr) \ 79 static const struct machine_desc __mach_desc_##_name \ 80 __used \ 81 __attribute__((__section__(".arch.info.init"))) = { \ 82 .nr = ~0, \ 83 .name = _namestr, 84 85 #endif 86