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-rw-r--r--kernel/arch/ia64/include/asm/thread_info.h152
1 files changed, 152 insertions, 0 deletions
diff --git a/kernel/arch/ia64/include/asm/thread_info.h b/kernel/arch/ia64/include/asm/thread_info.h
new file mode 100644
index 000000000..aa995b67c
--- /dev/null
+++ b/kernel/arch/ia64/include/asm/thread_info.h
@@ -0,0 +1,152 @@
+/*
+ * 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>
+
+#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() */
+ __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 */
+#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
+ __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, \
+ .flags = 0, \
+ .cpu = 0, \
+ .addr_limit = KERNEL_DS, \
+ .preempt_count = INIT_PREEMPT_COUNT, \
+}
+
+#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_node(tsk, node) \
+ ((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_node(tsk, node) ((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_NATIVE
+#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 alloc_task_struct_node(node) \
+({ \
+ struct page *page = alloc_pages_node(node, GFP_KERNEL | __GFP_COMP, \
+ KERNEL_STACK_SIZE_ORDER); \
+ struct task_struct *ret = page ? page_address(page) : NULL; \
+ \
+ ret; \
+})
+#define free_task_struct(tsk) free_pages((unsigned long) (tsk), KERNEL_STACK_SIZE_ORDER)
+
+#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_MEMDIE 17 /* is terminating due to OOM killer */
+#define TIF_MCA_INIT 18 /* this task is processing MCA or INIT */
+#define TIF_DB_DISABLED 19 /* debug trap disabled for fsyscall */
+#define TIF_RESTORE_RSE 21 /* user RBS is newer than kernel RBS */
+#define TIF_POLLING_NRFLAG 22 /* idle is polling for TIF_NEED_RESCHED */
+
+#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_MCA_INIT (1 << TIF_MCA_INIT)
+#define _TIF_DB_DISABLED (1 << TIF_DB_DISABLED)
+#define _TIF_RESTORE_RSE (1 << TIF_RESTORE_RSE)
+#define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
+
+/* "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_RESTORE_SIGMASK 2 /* restore signal mask in do_signal() */
+
+#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, &ti->flags));
+}
+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 /* _ASM_IA64_THREAD_INFO_H */