diff options
Diffstat (limited to 'kernel/arch/ia64/include/asm/thread_info.h')
| -rw-r--r-- | kernel/arch/ia64/include/asm/thread_info.h | 152 |
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 */ |