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 #ifdef CONFIG_GENERIC_IRQ_MULTI_HANDLER 60 void (*handle_irq)(struct pt_regs *); 61 #endif 62 void (*restart)(enum reboot_mode, const char *); 63 }; 64 65 /* 66 * Current machine - only accessible during boot. 67 */ 68 extern const struct machine_desc *machine_desc; 69 70 /* 71 * Machine type table - also only accessible during boot 72 */ 73 extern const struct machine_desc __arch_info_begin[], __arch_info_end[]; 74 #define for_each_machine_desc(p) \ 75 for (p = __arch_info_begin; p < __arch_info_end; p++) 76 77 /* 78 * Set of macros to define architecture features. This is built into 79 * a table by the linker. 80 */ 81 #define MACHINE_START(_type,_name) \ 82 static const struct machine_desc __mach_desc_##_type \ 83 __used \ 84 __attribute__((__section__(".arch.info.init"))) = { \ 85 .nr = MACH_TYPE_##_type, \ 86 .name = _name, 87 88 #define MACHINE_END \ 89 }; 90 91 #define DT_MACHINE_START(_name, _namestr) \ 92 static const struct machine_desc __mach_desc_##_name \ 93 __used \ 94 __attribute__((__section__(".arch.info.init"))) = { \ 95 .nr = ~0, \ 96 .name = _namestr, 97 98 #endif 99