diff options
Diffstat (limited to 'kernel/arch/s390/include/asm/thread_info.h')
| -rw-r--r-- | kernel/arch/s390/include/asm/thread_info.h | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/kernel/arch/s390/include/asm/thread_info.h b/kernel/arch/s390/include/asm/thread_info.h new file mode 100644 index 000000000..4c27ec764 --- /dev/null +++ b/kernel/arch/s390/include/asm/thread_info.h @@ -0,0 +1,99 @@ +/* + * S390 version + * Copyright IBM Corp. 2002, 2006 + * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com) + */ + +#ifndef _ASM_THREAD_INFO_H +#define _ASM_THREAD_INFO_H + +/* + * Size of kernel stack for each process + */ +#define THREAD_ORDER 2 +#define ASYNC_ORDER 2 + +#define THREAD_SIZE (PAGE_SIZE << THREAD_ORDER) +#define ASYNC_SIZE (PAGE_SIZE << ASYNC_ORDER) + +#ifndef __ASSEMBLY__ +#include <asm/lowcore.h> +#include <asm/page.h> +#include <asm/processor.h> + +/* + * low level task data that entry.S needs immediate access to + * - this struct should fit entirely inside of one cache line + * - this struct shares the supervisor stack pages + * - if the contents of this structure are changed, the assembly constants must also be changed + */ +struct thread_info { + struct task_struct *task; /* main task structure */ + unsigned long flags; /* low level flags */ + unsigned long sys_call_table; /* System call table address */ + unsigned int cpu; /* current CPU */ + int preempt_count; /* 0 => preemptable, <0 => BUG */ + unsigned int system_call; + __u64 user_timer; + __u64 system_timer; + unsigned long last_break; /* last breaking-event-address. */ +}; + +/* + * macros/functions for gaining access to the thread information structure + */ +#define INIT_THREAD_INFO(tsk) \ +{ \ + .task = &tsk, \ + .flags = 0, \ + .cpu = 0, \ + .preempt_count = INIT_PREEMPT_COUNT, \ +} + +#define init_thread_info (init_thread_union.thread_info) +#define init_stack (init_thread_union.stack) + +/* how to get the thread information struct from C */ +static inline struct thread_info *current_thread_info(void) +{ + return (struct thread_info *) S390_lowcore.thread_info; +} + +void arch_release_task_struct(struct task_struct *tsk); + +#define THREAD_SIZE_ORDER THREAD_ORDER + +#endif + +/* + * thread information flags bit numbers + */ +#define TIF_NOTIFY_RESUME 0 /* callback before returning to user */ +#define TIF_SIGPENDING 1 /* signal pending */ +#define TIF_NEED_RESCHED 2 /* rescheduling necessary */ +#define TIF_SYSCALL_TRACE 3 /* syscall trace active */ +#define TIF_SYSCALL_AUDIT 4 /* syscall auditing active */ +#define TIF_SECCOMP 5 /* secure computing */ +#define TIF_SYSCALL_TRACEPOINT 6 /* syscall tracepoint instrumentation */ +#define TIF_UPROBE 7 /* breakpointed or single-stepping */ +#define TIF_31BIT 16 /* 32bit process */ +#define TIF_MEMDIE 17 /* is terminating due to OOM killer */ +#define TIF_RESTORE_SIGMASK 18 /* restore signal mask in do_signal() */ +#define TIF_SINGLE_STEP 19 /* This task is single stepped */ +#define TIF_BLOCK_STEP 20 /* This task is block stepped */ +#define TIF_UPROBE_SINGLESTEP 21 /* This task is uprobe single stepped */ + +#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME) +#define _TIF_SIGPENDING (1<<TIF_SIGPENDING) +#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED) +#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE) +#define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT) +#define _TIF_SECCOMP (1<<TIF_SECCOMP) +#define _TIF_SYSCALL_TRACEPOINT (1<<TIF_SYSCALL_TRACEPOINT) +#define _TIF_UPROBE (1<<TIF_UPROBE) +#define _TIF_31BIT (1<<TIF_31BIT) +#define _TIF_SINGLE_STEP (1<<TIF_SINGLE_STEP) + +#define is_32bit_task() (test_thread_flag(TIF_31BIT)) + +#endif /* _ASM_THREAD_INFO_H */ |