GuanXuetao | f73670e | 2011-01-15 18:16:21 +0800 | [diff] [blame] | 1 | /* |
| 2 | * linux/arch/unicore32/include/asm/thread_info.h |
| 3 | * |
| 4 | * Code specific to PKUnity SoC and UniCore ISA |
| 5 | * |
| 6 | * Copyright (C) 2001-2010 GUAN Xue-tao |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License version 2 as |
| 10 | * published by the Free Software Foundation. |
| 11 | */ |
| 12 | #ifndef __UNICORE_THREAD_INFO_H__ |
| 13 | #define __UNICORE_THREAD_INFO_H__ |
| 14 | |
| 15 | #ifdef __KERNEL__ |
| 16 | |
| 17 | #include <linux/compiler.h> |
| 18 | #include <asm/fpstate.h> |
| 19 | |
| 20 | #define THREAD_SIZE_ORDER 1 |
| 21 | #define THREAD_SIZE 8192 |
| 22 | #define THREAD_START_SP (THREAD_SIZE - 8) |
| 23 | |
| 24 | #ifndef __ASSEMBLY__ |
| 25 | |
| 26 | struct task_struct; |
GuanXuetao | f73670e | 2011-01-15 18:16:21 +0800 | [diff] [blame] | 27 | |
| 28 | #include <asm/types.h> |
| 29 | |
| 30 | typedef struct { |
| 31 | unsigned long seg; |
| 32 | } mm_segment_t; |
| 33 | |
| 34 | struct cpu_context_save { |
| 35 | __u32 r4; |
| 36 | __u32 r5; |
| 37 | __u32 r6; |
| 38 | __u32 r7; |
| 39 | __u32 r8; |
| 40 | __u32 r9; |
| 41 | __u32 r10; |
| 42 | __u32 r11; |
| 43 | __u32 r12; |
| 44 | __u32 r13; |
| 45 | __u32 r14; |
| 46 | __u32 r15; |
| 47 | __u32 r16; |
| 48 | __u32 r17; |
| 49 | __u32 r18; |
| 50 | __u32 r19; |
| 51 | __u32 r20; |
| 52 | __u32 r21; |
| 53 | __u32 r22; |
| 54 | __u32 r23; |
| 55 | __u32 r24; |
| 56 | __u32 r25; |
| 57 | __u32 r26; |
| 58 | __u32 fp; |
| 59 | __u32 sp; |
| 60 | __u32 pc; |
| 61 | }; |
| 62 | |
| 63 | /* |
| 64 | * low level task data that entry.S needs immediate access to. |
| 65 | * __switch_to() assumes cpu_context follows immediately after cpu_domain. |
| 66 | */ |
| 67 | struct thread_info { |
| 68 | unsigned long flags; /* low level flags */ |
| 69 | int preempt_count; /* 0 => preemptable */ |
| 70 | /* <0 => bug */ |
| 71 | mm_segment_t addr_limit; /* address limit */ |
| 72 | struct task_struct *task; /* main task structure */ |
GuanXuetao | f73670e | 2011-01-15 18:16:21 +0800 | [diff] [blame] | 73 | __u32 cpu; /* cpu */ |
| 74 | struct cpu_context_save cpu_context; /* cpu context */ |
| 75 | __u32 syscall; /* syscall number */ |
| 76 | __u8 used_cp[16]; /* thread used copro */ |
| 77 | #ifdef CONFIG_UNICORE_FPU_F64 |
| 78 | struct fp_state fpstate __attribute__((aligned(8))); |
| 79 | #endif |
GuanXuetao | f73670e | 2011-01-15 18:16:21 +0800 | [diff] [blame] | 80 | }; |
| 81 | |
| 82 | #define INIT_THREAD_INFO(tsk) \ |
| 83 | { \ |
| 84 | .task = &tsk, \ |
GuanXuetao | f73670e | 2011-01-15 18:16:21 +0800 | [diff] [blame] | 85 | .flags = 0, \ |
| 86 | .preempt_count = INIT_PREEMPT_COUNT, \ |
| 87 | .addr_limit = KERNEL_DS, \ |
GuanXuetao | f73670e | 2011-01-15 18:16:21 +0800 | [diff] [blame] | 88 | } |
| 89 | |
| 90 | #define init_thread_info (init_thread_union.thread_info) |
| 91 | #define init_stack (init_thread_union.stack) |
| 92 | |
| 93 | /* |
| 94 | * how to get the thread information struct from C |
| 95 | */ |
| 96 | static inline struct thread_info *current_thread_info(void) __attribute_const__; |
| 97 | |
| 98 | static inline struct thread_info *current_thread_info(void) |
| 99 | { |
| 100 | register unsigned long sp asm ("sp"); |
| 101 | return (struct thread_info *)(sp & ~(THREAD_SIZE - 1)); |
| 102 | } |
| 103 | |
| 104 | #define thread_saved_pc(tsk) \ |
| 105 | ((unsigned long)(task_thread_info(tsk)->cpu_context.pc)) |
| 106 | #define thread_saved_sp(tsk) \ |
| 107 | ((unsigned long)(task_thread_info(tsk)->cpu_context.sp)) |
| 108 | #define thread_saved_fp(tsk) \ |
| 109 | ((unsigned long)(task_thread_info(tsk)->cpu_context.fp)) |
| 110 | |
| 111 | #endif |
| 112 | |
| 113 | /* |
GuanXuetao | f73670e | 2011-01-15 18:16:21 +0800 | [diff] [blame] | 114 | * thread information flags: |
| 115 | * TIF_SYSCALL_TRACE - syscall trace active |
| 116 | * TIF_SIGPENDING - signal pending |
| 117 | * TIF_NEED_RESCHED - rescheduling necessary |
| 118 | * TIF_NOTIFY_RESUME - callback before returning to user |
| 119 | */ |
| 120 | #define TIF_SIGPENDING 0 |
| 121 | #define TIF_NEED_RESCHED 1 |
| 122 | #define TIF_NOTIFY_RESUME 2 /* callback before returning to user */ |
| 123 | #define TIF_SYSCALL_TRACE 8 |
| 124 | #define TIF_MEMDIE 18 |
GuanXuetao | f73670e | 2011-01-15 18:16:21 +0800 | [diff] [blame] | 125 | #define TIF_RESTORE_SIGMASK 20 |
| 126 | |
| 127 | #define _TIF_SIGPENDING (1 << TIF_SIGPENDING) |
| 128 | #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED) |
| 129 | #define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME) |
| 130 | #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE) |
GuanXuetao | f73670e | 2011-01-15 18:16:21 +0800 | [diff] [blame] | 131 | |
| 132 | /* |
| 133 | * Change these and you break ASM code in entry-common.S |
| 134 | */ |
Al Viro | 87b0e71 | 2012-05-05 18:29:41 -0400 | [diff] [blame] | 135 | #define _TIF_WORK_MASK \ |
| 136 | (_TIF_SIGPENDING | _TIF_NEED_RESCHED | _TIF_NOTIFY_RESUME) |
GuanXuetao | f73670e | 2011-01-15 18:16:21 +0800 | [diff] [blame] | 137 | |
| 138 | #endif /* __KERNEL__ */ |
| 139 | #endif /* __UNICORE_THREAD_INFO_H__ */ |