1 /* 2 * arch/arm/include/asm/proc-fns.h 3 * 4 * Copyright (C) 1997-1999 Russell King 5 * Copyright (C) 2000 Deep Blue Solutions Ltd 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License version 2 as 9 * published by the Free Software Foundation. 10 */ 11 #ifndef __ASM_PROCFNS_H 12 #define __ASM_PROCFNS_H 13 14 #ifdef __KERNEL__ 15 16 #include <asm/glue-proc.h> 17 #include <asm/page.h> 18 19 #ifndef __ASSEMBLY__ 20 21 struct mm_struct; 22 23 /* 24 * Don't change this structure - ASM code relies on it. 25 */ 26 extern struct processor { 27 /* MISC 28 * get data abort address/flags 29 */ 30 void (*_data_abort)(unsigned long pc); 31 /* 32 * Retrieve prefetch fault address 33 */ 34 unsigned long (*_prefetch_abort)(unsigned long lr); 35 /* 36 * Set up any processor specifics 37 */ 38 void (*_proc_init)(void); 39 /* 40 * Disable any processor specifics 41 */ 42 void (*_proc_fin)(void); 43 /* 44 * Special stuff for a reset 45 */ 46 void (*reset)(unsigned long addr) __attribute__((noreturn)); 47 /* 48 * Idle the processor 49 */ 50 int (*_do_idle)(void); 51 /* 52 * Processor architecture specific 53 */ 54 /* 55 * clean a virtual address range from the 56 * D-cache without flushing the cache. 57 */ 58 void (*dcache_clean_area)(void *addr, int size); 59 60 /* 61 * Set the page table 62 */ 63 void (*switch_mm)(unsigned long pgd_phys, struct mm_struct *mm); 64 /* 65 * Set a possibly extended PTE. Non-extended PTEs should 66 * ignore 'ext'. 67 */ 68 void (*set_pte_ext)(pte_t *ptep, pte_t pte, unsigned int ext); 69 70 /* Suspend/resume */ 71 unsigned int suspend_size; 72 void (*do_suspend)(void *); 73 void (*do_resume)(void *); 74 } processor; 75 76 #ifndef MULTI_CPU 77 extern void cpu_proc_init(void); 78 extern void cpu_proc_fin(void); 79 extern int cpu_do_idle(void); 80 extern void cpu_dcache_clean_area(void *, int); 81 extern void cpu_do_switch_mm(unsigned long pgd_phys, struct mm_struct *mm); 82 extern void cpu_set_pte_ext(pte_t *ptep, pte_t pte, unsigned int ext); 83 extern void cpu_reset(unsigned long addr) __attribute__((noreturn)); 84 #else 85 #define cpu_proc_init processor._proc_init 86 #define cpu_proc_fin processor._proc_fin 87 #define cpu_reset processor.reset 88 #define cpu_do_idle processor._do_idle 89 #define cpu_dcache_clean_area processor.dcache_clean_area 90 #define cpu_set_pte_ext processor.set_pte_ext 91 #define cpu_do_switch_mm processor.switch_mm 92 #endif 93 94 extern void cpu_resume(void); 95 96 #include <asm/memory.h> 97 98 #ifdef CONFIG_MMU 99 100 #define cpu_switch_mm(pgd,mm) cpu_do_switch_mm(virt_to_phys(pgd),mm) 101 102 #define cpu_get_pgd() \ 103 ({ \ 104 unsigned long pg; \ 105 __asm__("mrc p15, 0, %0, c2, c0, 0" \ 106 : "=r" (pg) : : "cc"); \ 107 pg &= ~0x3fff; \ 108 (pgd_t *)phys_to_virt(pg); \ 109 }) 110 111 #endif 112 113 #endif /* __ASSEMBLY__ */ 114 #endif /* __KERNEL__ */ 115 #endif /* __ASM_PROCFNS_H */ 116