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/
usr/
src/
linux-headers-3.0.0-14/
arch/
mn10300/
include/
asm/
- drwxr-xr-x
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Viewing file: thread_info.h (5.02 KB) -rw-r--r--Select action/file-type:  ( +) |  ( +) |  ( +) | Code ( +) | Session ( +) |  ( +) | SDB ( +) |  ( +) |  ( +) |  ( +) |  ( +) |  ( +) |
/* MN10300 Low-level thread information * * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. * Written by David Howells (dhowells@redhat.com) * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public Licence * as published by the Free Software Foundation; either version * 2 of the Licence, or (at your option) any later version. */
#ifndef _ASM_THREAD_INFO_H #define _ASM_THREAD_INFO_H
#ifdef __KERNEL__
#include <asm/page.h>
#define PREEMPT_ACTIVE 0x10000000
#ifdef CONFIG_4KSTACKS #define THREAD_SIZE (4096) #else #define THREAD_SIZE (8192) #endif
#define STACK_WARN (THREAD_SIZE / 8)
/* * 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 */ #ifndef __ASSEMBLY__ typedef struct { unsigned long seg; } mm_segment_t;
struct thread_info { struct task_struct *task; /* main task structure */ struct exec_domain *exec_domain; /* execution domain */ struct pt_regs *frame; /* current exception frame */ unsigned long flags; /* low level flags */ __u32 cpu; /* current CPU */ __s32 preempt_count; /* 0 => preemptable, <0 => BUG */
mm_segment_t addr_limit; /* thread address space: 0-0xBFFFFFFF for user-thead 0-0xFFFFFFFF for kernel-thread */ struct restart_block restart_block;
__u8 supervisor_stack[0]; };
#define thread_info_to_uregs(ti) \ ((struct pt_regs *) \ ((unsigned long)ti + THREAD_SIZE - sizeof(struct pt_regs)))
#else /* !__ASSEMBLY__ */
#ifndef __ASM_OFFSETS_H__ #include <asm/asm-offsets.h> #endif
#endif
/* * macros/functions for gaining access to the thread information structure */ #ifndef __ASSEMBLY__
#define INIT_THREAD_INFO(tsk) \ { \ .task = &tsk, \ .exec_domain = &default_exec_domain, \ .flags = 0, \ .cpu = 0, \ .preempt_count = INIT_PREEMPT_COUNT, \ .addr_limit = KERNEL_DS, \ .restart_block = { \ .fn = do_no_restart_syscall, \ }, \ }
#define init_thread_info (init_thread_union.thread_info) #define init_stack (init_thread_union.stack) #define init_uregs \ ((struct pt_regs *) \ ((unsigned long) init_stack + THREAD_SIZE - sizeof(struct pt_regs)))
extern struct thread_info *__current_ti;
/* how to get the thread information struct from C */ static inline __attribute__((const)) struct thread_info *current_thread_info(void) { struct thread_info *ti; asm("mov sp,%0\n" "and %1,%0\n" : "=d" (ti) : "i" (~(THREAD_SIZE - 1)) : "cc"); return ti; }
static inline __attribute__((const)) struct pt_regs *current_frame(void) { return current_thread_info()->frame; }
/* how to get the current stack pointer from C */ static inline unsigned long current_stack_pointer(void) { unsigned long sp; asm("mov sp,%0; ":"=r" (sp)); return sp; }
#define __HAVE_ARCH_THREAD_INFO_ALLOCATOR
/* thread information allocation */ #ifdef CONFIG_DEBUG_STACK_USAGE #define alloc_thread_info_node(tsk, node) \ kzalloc_node(THREAD_SIZE, GFP_KERNEL, node) #else #define alloc_thread_info_node(tsk, node) \ kmalloc_node(THREAD_SIZE, GFP_KERNEL, node) #endif
#ifndef CONFIG_KGDB #define free_thread_info(ti) kfree((ti)) #else extern void free_thread_info(struct thread_info *); #endif #define get_thread_info(ti) get_task_struct((ti)->task) #define put_thread_info(ti) put_task_struct((ti)->task)
#else /* !__ASSEMBLY__ */
#ifndef __VMLINUX_LDS__ /* how to get the thread information struct from ASM */ .macro GET_THREAD_INFO reg mov sp,\reg and -THREAD_SIZE,\reg .endm #endif #endif
/* * thread information flags * - these are process state flags that various assembly files may need to * access * - pending work-to-be-done flags are in LSW * - other flags in MSW */ #define TIF_SYSCALL_TRACE 0 /* syscall trace active */ #define TIF_NOTIFY_RESUME 1 /* resumption notification requested */ #define TIF_SIGPENDING 2 /* signal pending */ #define TIF_NEED_RESCHED 3 /* rescheduling necessary */ #define TIF_SINGLESTEP 4 /* restore singlestep on return to user mode */ #define TIF_RESTORE_SIGMASK 5 /* restore signal mask in do_signal() */ #define TIF_POLLING_NRFLAG 16 /* true if poll_idle() is polling TIF_NEED_RESCHED */ #define TIF_MEMDIE 17 /* is terminating due to OOM killer */ #define TIF_FREEZE 18 /* freezing for suspend */
#define _TIF_SYSCALL_TRACE +(1 << TIF_SYSCALL_TRACE) #define _TIF_NOTIFY_RESUME +(1 << TIF_NOTIFY_RESUME) #define _TIF_SIGPENDING +(1 << TIF_SIGPENDING) #define _TIF_NEED_RESCHED +(1 << TIF_NEED_RESCHED) #define _TIF_SINGLESTEP +(1 << TIF_SINGLESTEP) #define _TIF_RESTORE_SIGMASK +(1 << TIF_RESTORE_SIGMASK) #define _TIF_POLLING_NRFLAG +(1 << TIF_POLLING_NRFLAG) #define _TIF_FREEZE +(1 << TIF_FREEZE)
#define _TIF_WORK_MASK 0x0000FFFE /* work to do on interrupt/exception return */ #define _TIF_ALLWORK_MASK 0x0000FFFF /* work to do on any return to u-space */
#endif /* __KERNEL__ */
#endif /* _ASM_THREAD_INFO_H */
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