From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Wed, 5 Aug 2015 17:04:01 -0300 Subject: Initial import --- arch/um/include/asm/thread_info.h | 72 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 72 insertions(+) create mode 100644 arch/um/include/asm/thread_info.h (limited to 'arch/um/include/asm/thread_info.h') diff --git a/arch/um/include/asm/thread_info.h b/arch/um/include/asm/thread_info.h new file mode 100644 index 000000000..b30c85b14 --- /dev/null +++ b/arch/um/include/asm/thread_info.h @@ -0,0 +1,72 @@ +/* + * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) + * Licensed under the GPL + */ + +#ifndef __UM_THREAD_INFO_H +#define __UM_THREAD_INFO_H + +#ifndef __ASSEMBLY__ + +#include +#include +#include + +struct thread_info { + struct task_struct *task; /* main task structure */ + unsigned long flags; /* low level flags */ + __u32 cpu; /* current CPU */ + int preempt_count; /* 0 => preemptable, + <0 => BUG */ + mm_segment_t addr_limit; /* thread address space: + 0-0xBFFFFFFF for user + 0-0xFFFFFFFF for kernel */ + struct thread_info *real_thread; /* Points to non-IRQ stack */ +}; + +#define INIT_THREAD_INFO(tsk) \ +{ \ + .task = &tsk, \ + .flags = 0, \ + .cpu = 0, \ + .preempt_count = INIT_PREEMPT_COUNT, \ + .addr_limit = KERNEL_DS, \ + .real_thread = NULL, \ +} + +#define init_thread_info (init_thread_union.thread_info) +#define init_stack (init_thread_union.stack) + +#define THREAD_SIZE ((1 << CONFIG_KERNEL_STACK_ORDER) * PAGE_SIZE) +/* how to get the thread information struct from C */ +static inline struct thread_info *current_thread_info(void) +{ + struct thread_info *ti; + unsigned long mask = THREAD_SIZE - 1; + void *p; + + asm volatile ("" : "=r" (p) : "0" (&ti)); + ti = (struct thread_info *) (((unsigned long)p) & ~mask); + return ti; +} + +#define THREAD_SIZE_ORDER CONFIG_KERNEL_STACK_ORDER + +#endif + +#define TIF_SYSCALL_TRACE 0 /* syscall trace active */ +#define TIF_SIGPENDING 1 /* signal pending */ +#define TIF_NEED_RESCHED 2 /* rescheduling necessary */ +#define TIF_RESTART_BLOCK 4 +#define TIF_MEMDIE 5 /* is terminating due to OOM killer */ +#define TIF_SYSCALL_AUDIT 6 +#define TIF_RESTORE_SIGMASK 7 +#define TIF_NOTIFY_RESUME 8 + +#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE) +#define _TIF_SIGPENDING (1 << TIF_SIGPENDING) +#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED) +#define _TIF_MEMDIE (1 << TIF_MEMDIE) +#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT) + +#endif -- cgit v1.2.3-54-g00ecf