diff options
Diffstat (limited to 'arch/sh/include/asm/thread_info.h')
| -rw-r--r-- | arch/sh/include/asm/thread_info.h | 122 |
1 files changed, 88 insertions, 34 deletions
diff --git a/arch/sh/include/asm/thread_info.h b/arch/sh/include/asm/thread_info.h index f09ac480629..ad27ffa65e2 100644 --- a/arch/sh/include/asm/thread_info.h +++ b/arch/sh/include/asm/thread_info.h @@ -10,8 +10,18 @@ * - Incorporating suggestions made by Linus Torvalds and Dave Miller */ #ifdef __KERNEL__ + #include <asm/page.h> +/* + * Page fault error code bits + */ +#define FAULT_CODE_WRITE (1 << 0) /* write access */ +#define FAULT_CODE_INITIAL (1 << 1) /* initial page write */ +#define FAULT_CODE_ITLB (1 << 2) /* ITLB miss */ +#define FAULT_CODE_PROT (1 << 3) /* protection fault */ +#define FAULT_CODE_USER (1 << 4) /* user-mode access */ + #ifndef __ASSEMBLY__ #include <asm/processor.h> @@ -19,6 +29,7 @@ struct thread_info { struct task_struct *task; /* main task structure */ struct exec_domain *exec_domain; /* execution domain */ unsigned long flags; /* low level flags */ + __u32 status; /* thread synchronous flags */ __u32 cpu; int preempt_count; /* 0 => preemptable, <0 => BUG */ mm_segment_t addr_limit; /* thread address space */ @@ -30,8 +41,6 @@ struct thread_info { #endif -#define PREEMPT_ACTIVE 0x10000000 - #if defined(CONFIG_4KSTACKS) #define THREAD_SHIFT 12 #else @@ -50,8 +59,9 @@ struct thread_info { .task = &tsk, \ .exec_domain = &default_exec_domain, \ .flags = 0, \ + .status = 0, \ .cpu = 0, \ - .preempt_count = 1, \ + .preempt_count = INIT_PREEMPT_COUNT, \ .addr_limit = KERNEL_DS, \ .restart_block = { \ .fn = do_no_restart_syscall, \ @@ -86,73 +96,117 @@ static inline struct thread_info *current_thread_info(void) return ti; } -/* thread information allocation */ -#if THREAD_SHIFT >= PAGE_SHIFT - #define THREAD_SIZE_ORDER (THREAD_SHIFT - PAGE_SHIFT) -#else /* THREAD_SHIFT < PAGE_SHIFT */ - -#define __HAVE_ARCH_THREAD_INFO_ALLOCATOR - -extern struct thread_info *alloc_thread_info(struct task_struct *tsk); -extern void free_thread_info(struct thread_info *ti); - -#endif /* THREAD_SHIFT < PAGE_SHIFT */ +extern void arch_task_cache_init(void); +extern int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src); +extern void arch_release_task_struct(struct task_struct *tsk); +extern void init_thread_xstate(void); #endif /* __ASSEMBLY__ */ /* - * thread information flags - * - these are process state flags that various assembly files may need to access - * - pending work-to-be-done flags are in LSW - * - other flags in MSW + * Thread information flags + * + * - Limited to 24 bits, upper byte used for fault code encoding. + * + * - _TIF_ALLWORK_MASK and _TIF_WORK_MASK need to fit within 2 bytes, or + * we blow the tst immediate size constraints and need to fix up + * arch/sh/kernel/entry-common.S. */ #define TIF_SYSCALL_TRACE 0 /* syscall trace active */ #define TIF_SIGPENDING 1 /* signal pending */ #define TIF_NEED_RESCHED 2 /* rescheduling necessary */ -#define TIF_RESTORE_SIGMASK 3 /* restore signal mask in do_signal() */ #define TIF_SINGLESTEP 4 /* singlestepping active */ #define TIF_SYSCALL_AUDIT 5 /* syscall auditing active */ #define TIF_SECCOMP 6 /* secure computing */ #define TIF_NOTIFY_RESUME 7 /* callback before returning to user */ -#define TIF_USEDFPU 16 /* FPU was used by this task this quantum (SMP) */ +#define TIF_SYSCALL_TRACEPOINT 8 /* for ftrace syscall instrumentation */ #define TIF_POLLING_NRFLAG 17 /* true if poll_idle() is polling TIF_NEED_RESCHED */ -#define TIF_MEMDIE 18 -#define TIF_FREEZE 19 /* Freezing for suspend */ +#define TIF_MEMDIE 18 /* is terminating due to OOM killer */ #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE) #define _TIF_SIGPENDING (1 << TIF_SIGPENDING) #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED) -#define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK) #define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP) #define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT) #define _TIF_SECCOMP (1 << TIF_SECCOMP) #define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME) -#define _TIF_USEDFPU (1 << TIF_USEDFPU) +#define _TIF_SYSCALL_TRACEPOINT (1 << TIF_SYSCALL_TRACEPOINT) #define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG) -#define _TIF_FREEZE (1 << TIF_FREEZE) - -/* - * _TIF_ALLWORK_MASK and _TIF_WORK_MASK need to fit within a byte, or we - * blow the tst immediate size constraints and need to fix up - * arch/sh/kernel/entry-common.S. - */ /* work to do in syscall trace */ #define _TIF_WORK_SYSCALL_MASK (_TIF_SYSCALL_TRACE | _TIF_SINGLESTEP | \ - _TIF_SYSCALL_AUDIT | _TIF_SECCOMP) + _TIF_SYSCALL_AUDIT | _TIF_SECCOMP | \ + _TIF_SYSCALL_TRACEPOINT) /* work to do on any return to u-space */ #define _TIF_ALLWORK_MASK (_TIF_SYSCALL_TRACE | _TIF_SIGPENDING | \ _TIF_NEED_RESCHED | _TIF_SYSCALL_AUDIT | \ - _TIF_SINGLESTEP | _TIF_RESTORE_SIGMASK | \ - _TIF_NOTIFY_RESUME) + _TIF_SINGLESTEP | _TIF_NOTIFY_RESUME | \ + _TIF_SYSCALL_TRACEPOINT) /* work to do on interrupt/exception return */ #define _TIF_WORK_MASK (_TIF_ALLWORK_MASK & ~(_TIF_SYSCALL_TRACE | \ _TIF_SYSCALL_AUDIT | _TIF_SINGLESTEP)) +/* + * Thread-synchronous status. + * + * This is different from the flags in that nobody else + * ever touches our thread-synchronous status, so we don't + * have to worry about atomic accesses. + */ +#define TS_RESTORE_SIGMASK 0x0001 /* restore signal mask in do_signal() */ +#define TS_USEDFPU 0x0002 /* FPU used by this task this quantum */ + +#ifndef __ASSEMBLY__ + +#define HAVE_SET_RESTORE_SIGMASK 1 +static inline void set_restore_sigmask(void) +{ + struct thread_info *ti = current_thread_info(); + ti->status |= TS_RESTORE_SIGMASK; + WARN_ON(!test_bit(TIF_SIGPENDING, (unsigned long *)&ti->flags)); +} + +#define TI_FLAG_FAULT_CODE_SHIFT 24 + +/* + * Additional thread flag encoding + */ +static inline void set_thread_fault_code(unsigned int val) +{ + struct thread_info *ti = current_thread_info(); + ti->flags = (ti->flags & (~0 >> (32 - TI_FLAG_FAULT_CODE_SHIFT))) + | (val << TI_FLAG_FAULT_CODE_SHIFT); +} + +static inline unsigned int get_thread_fault_code(void) +{ + struct thread_info *ti = current_thread_info(); + return ti->flags >> TI_FLAG_FAULT_CODE_SHIFT; +} + +static inline void clear_restore_sigmask(void) +{ + current_thread_info()->status &= ~TS_RESTORE_SIGMASK; +} +static inline bool test_restore_sigmask(void) +{ + return current_thread_info()->status & TS_RESTORE_SIGMASK; +} +static inline bool test_and_clear_restore_sigmask(void) +{ + struct thread_info *ti = current_thread_info(); + if (!(ti->status & TS_RESTORE_SIGMASK)) + return false; + ti->status &= ~TS_RESTORE_SIGMASK; + return true; +} + +#endif /* !__ASSEMBLY__ */ + #endif /* __KERNEL__ */ #endif /* __ASM_SH_THREAD_INFO_H */ |