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Diffstat (limited to 'arch/ia64/include/asm/thread_info.h')
-rw-r--r--arch/ia64/include/asm/thread_info.h148
1 files changed, 148 insertions, 0 deletions
diff --git a/arch/ia64/include/asm/thread_info.h b/arch/ia64/include/asm/thread_info.h
new file mode 100644
index 00000000000..7c60fcdd2ef
--- /dev/null
+++ b/arch/ia64/include/asm/thread_info.h
@@ -0,0 +1,148 @@
+/*
+ * Copyright (C) 2002-2003 Hewlett-Packard Co
+ * David Mosberger-Tang <davidm@hpl.hp.com>
+ */
+#ifndef _ASM_IA64_THREAD_INFO_H
+#define _ASM_IA64_THREAD_INFO_H
+
+#ifndef ASM_OFFSETS_C
+#include <asm/asm-offsets.h>
+#endif
+#include <asm/processor.h>
+#include <asm/ptrace.h>
+
+#define PREEMPT_ACTIVE_BIT 30
+#define PREEMPT_ACTIVE (1 << PREEMPT_ACTIVE_BIT)
+
+#ifndef __ASSEMBLY__
+
+/*
+ * On IA-64, we want to keep the task structure and kernel stack together, so they can be
+ * mapped by a single TLB entry and so they can be addressed by the "current" pointer
+ * without having to do pointer masking.
+ */
+struct thread_info {
+ struct task_struct *task; /* XXX not really needed, except for dup_task_struct() */
+ struct exec_domain *exec_domain;/* execution domain */
+ __u32 flags; /* thread_info flags (see TIF_*) */
+ __u32 cpu; /* current CPU */
+ __u32 last_cpu; /* Last CPU thread ran on */
+ __u32 status; /* Thread synchronous flags */
+ mm_segment_t addr_limit; /* user-level address space limit */
+ int preempt_count; /* 0=premptable, <0=BUG; will also serve as bh-counter */
+ struct restart_block restart_block;
+#ifdef CONFIG_VIRT_CPU_ACCOUNTING
+ __u64 ac_stamp;
+ __u64 ac_leave;
+ __u64 ac_stime;
+ __u64 ac_utime;
+#endif
+};
+
+#define THREAD_SIZE KERNEL_STACK_SIZE
+
+#define INIT_THREAD_INFO(tsk) \
+{ \
+ .task = &tsk, \
+ .exec_domain = &default_exec_domain, \
+ .flags = 0, \
+ .cpu = 0, \
+ .addr_limit = KERNEL_DS, \
+ .preempt_count = 0, \
+ .restart_block = { \
+ .fn = do_no_restart_syscall, \
+ }, \
+}
+
+#define __HAVE_ARCH_THREAD_INFO_ALLOCATOR
+
+#ifndef ASM_OFFSETS_C
+/* how to get the thread information struct from C */
+#define current_thread_info() ((struct thread_info *) ((char *) current + IA64_TASK_SIZE))
+#define alloc_thread_info(tsk) ((struct thread_info *) ((char *) (tsk) + IA64_TASK_SIZE))
+#define task_thread_info(tsk) ((struct thread_info *) ((char *) (tsk) + IA64_TASK_SIZE))
+#else
+#define current_thread_info() ((struct thread_info *) 0)
+#define alloc_thread_info(tsk) ((struct thread_info *) 0)
+#define task_thread_info(tsk) ((struct thread_info *) 0)
+#endif
+#define free_thread_info(ti) /* nothing */
+#define task_stack_page(tsk) ((void *)(tsk))
+
+#define __HAVE_THREAD_FUNCTIONS
+#ifdef CONFIG_VIRT_CPU_ACCOUNTING
+#define setup_thread_stack(p, org) \
+ *task_thread_info(p) = *task_thread_info(org); \
+ task_thread_info(p)->ac_stime = 0; \
+ task_thread_info(p)->ac_utime = 0; \
+ task_thread_info(p)->task = (p);
+#else
+#define setup_thread_stack(p, org) \
+ *task_thread_info(p) = *task_thread_info(org); \
+ task_thread_info(p)->task = (p);
+#endif
+#define end_of_stack(p) (unsigned long *)((void *)(p) + IA64_RBS_OFFSET)
+
+#define __HAVE_ARCH_TASK_STRUCT_ALLOCATOR
+#define alloc_task_struct() ((struct task_struct *)__get_free_pages(GFP_KERNEL | __GFP_COMP, KERNEL_STACK_SIZE_ORDER))
+#define free_task_struct(tsk) free_pages((unsigned long) (tsk), KERNEL_STACK_SIZE_ORDER)
+
+#define tsk_set_notify_resume(tsk) \
+ set_ti_thread_flag(task_thread_info(tsk), TIF_NOTIFY_RESUME)
+extern void tsk_clear_notify_resume(struct task_struct *tsk);
+#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 least-significant 16 bits, other flags
+ * in top 16 bits
+ */
+#define TIF_SIGPENDING 0 /* signal pending */
+#define TIF_NEED_RESCHED 1 /* rescheduling necessary */
+#define TIF_SYSCALL_TRACE 2 /* syscall trace active */
+#define TIF_SYSCALL_AUDIT 3 /* syscall auditing active */
+#define TIF_SINGLESTEP 4 /* restore singlestep on return to user mode */
+#define TIF_NOTIFY_RESUME 6 /* resumption notification requested */
+#define TIF_POLLING_NRFLAG 16 /* true if poll_idle() is polling TIF_NEED_RESCHED */
+#define TIF_MEMDIE 17
+#define TIF_MCA_INIT 18 /* this task is processing MCA or INIT */
+#define TIF_DB_DISABLED 19 /* debug trap disabled for fsyscall */
+#define TIF_FREEZE 20 /* is freezing for suspend */
+#define TIF_RESTORE_RSE 21 /* user RBS is newer than kernel RBS */
+
+#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
+#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
+#define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP)
+#define _TIF_SYSCALL_TRACEAUDIT (_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SINGLESTEP)
+#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
+#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
+#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
+#define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
+#define _TIF_MCA_INIT (1 << TIF_MCA_INIT)
+#define _TIF_DB_DISABLED (1 << TIF_DB_DISABLED)
+#define _TIF_FREEZE (1 << TIF_FREEZE)
+#define _TIF_RESTORE_RSE (1 << TIF_RESTORE_RSE)
+
+/* "work to do on user-return" bits */
+#define TIF_ALLWORK_MASK (_TIF_SIGPENDING|_TIF_NOTIFY_RESUME|_TIF_SYSCALL_AUDIT|\
+ _TIF_NEED_RESCHED|_TIF_SYSCALL_TRACE)
+/* like TIF_ALLWORK_BITS but sans TIF_SYSCALL_TRACE or TIF_SYSCALL_AUDIT */
+#define TIF_WORK_MASK (TIF_ALLWORK_MASK&~(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT))
+
+#define TS_POLLING 1 /* true if in idle loop and not sleeping */
+#define TS_RESTORE_SIGMASK 2 /* restore signal mask in do_signal() */
+
+#define tsk_is_polling(t) (task_thread_info(t)->status & TS_POLLING)
+
+#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;
+ set_bit(TIF_SIGPENDING, &ti->flags);
+}
+#endif /* !__ASSEMBLY__ */
+
+#endif /* _ASM_IA64_THREAD_INFO_H */