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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 | /* * include/asm-arm/processor.h * * Copyright (C) 1995 Russell King */ #ifndef __ASM_ARM_PROCESSOR_H #define __ASM_ARM_PROCESSOR_H /* * Default implementation of macro that returns current * instruction pointer ("program counter"). */ #define current_text_addr() ({ __label__ _l; _l: &&_l;}) #define FP_SIZE 35 struct fp_hard_struct { unsigned int save[FP_SIZE]; /* as yet undefined */ }; struct fp_soft_struct { unsigned int save[FP_SIZE]; /* undefined information */ }; union fp_state { struct fp_hard_struct hard; struct fp_soft_struct soft; }; typedef unsigned long mm_segment_t; /* domain register */ #ifdef __KERNEL__ #define NR_DEBUGS 5 #include <asm/atomic.h> #include <asm/ptrace.h> #include <asm/arch/memory.h> #include <asm/arch/processor.h> #include <asm/proc/processor.h> struct debug_info { int nsaved; struct { unsigned long address; unsigned long insn; } bp[2]; }; struct thread_struct { atomic_t refcount; /* fault info */ unsigned long address; unsigned long trap_no; unsigned long error_code; /* floating point */ union fp_state fpstate; /* debugging */ struct debug_info debug; /* context info */ struct context_save_struct *save; EXTRA_THREAD_STRUCT }; #define INIT_MMAP \ { &init_mm, 0, 0, NULL, PAGE_SHARED, VM_READ | VM_WRITE | VM_EXEC, 1, NULL, NULL } #define INIT_THREAD { \ ATOMIC_INIT(1), \ 0, \ 0, \ 0, \ { { { 0, }, }, }, \ { 0, }, \ (struct context_save_struct *)0 \ EXTRA_THREAD_STRUCT_INIT \ } /* * Return saved PC of a blocked thread. */ extern __inline__ unsigned long thread_saved_pc(struct thread_struct *t) { return t->save ? pc_pointer(t->save->pc) : 0; } extern __inline__ unsigned long get_css_fp(struct thread_struct *t) { return t->save ? t->save->fp : 0; } asmlinkage void ret_from_sys_call(void) __asm__("ret_from_sys_call"); extern __inline__ void init_thread_css(struct context_save_struct *save) { *save = INIT_CSS; save->pc |= (unsigned long)ret_from_sys_call; } /* Forward declaration, a strange C thing */ struct task_struct; struct mm_struct; /* Free all resources held by a thread. */ extern void release_thread(struct task_struct *); /* Copy and release all segment info associated with a VM */ #define copy_segments(tsk, mm) do { } while (0) #define release_segments(mm) do { } while (0) #define forget_segments() do { } while (0) unsigned long get_wchan(struct task_struct *p); #define THREAD_SIZE (8192) extern struct task_struct *alloc_task_struct(void); extern void __free_task_struct(struct task_struct *); #define get_task_struct(p) atomic_inc(&(p)->thread.refcount) #define put_task_struct(p) free_task_struct(p) #define free_task_struct(p) \ do { \ if (atomic_dec_and_test(&(p)->thread.refcount)) \ __free_task_struct((p)); \ } while (0) #define init_task (init_task_union.task) #define init_stack (init_task_union.stack) /* * Create a new kernel thread */ extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags); #endif #endif /* __ASM_ARM_PROCESSOR_H */ |