b69c49b784
We duplicate alloc/free_thread_info defines on many platforms (the majority uses __get_free_pages/free_pages). This patch defines common defines and removes these duplicated defines. __HAVE_ARCH_THREAD_INFO_ALLOCATOR is introduced for platforms that do something different. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Acked-by: Russell King <rmk+kernel@arm.linux.org.uk> Cc: Pekka Enberg <penberg@cs.helsinki.fi> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
116 lines
3.6 KiB
C
116 lines
3.6 KiB
C
/*
|
|
* Copyright (C) 2004-2006 Atmel Corporation
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
#ifndef __ASM_AVR32_THREAD_INFO_H
|
|
#define __ASM_AVR32_THREAD_INFO_H
|
|
|
|
#include <asm/page.h>
|
|
|
|
#define THREAD_SIZE_ORDER 1
|
|
#define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER)
|
|
|
|
#ifndef __ASSEMBLY__
|
|
#include <asm/types.h>
|
|
|
|
struct task_struct;
|
|
struct exec_domain;
|
|
|
|
struct thread_info {
|
|
struct task_struct *task; /* main task structure */
|
|
struct exec_domain *exec_domain; /* execution domain */
|
|
unsigned long flags; /* low level flags */
|
|
__u32 cpu;
|
|
__s32 preempt_count; /* 0 => preemptable, <0 => BUG */
|
|
__u32 rar_saved; /* return address... */
|
|
__u32 rsr_saved; /* ...and status register
|
|
saved by debug handler
|
|
when setting up
|
|
trampoline */
|
|
struct restart_block restart_block;
|
|
__u8 supervisor_stack[0];
|
|
};
|
|
|
|
#define INIT_THREAD_INFO(tsk) \
|
|
{ \
|
|
.task = &tsk, \
|
|
.exec_domain = &default_exec_domain, \
|
|
.flags = 0, \
|
|
.cpu = 0, \
|
|
.preempt_count = 1, \
|
|
.restart_block = { \
|
|
.fn = do_no_restart_syscall \
|
|
} \
|
|
}
|
|
|
|
#define init_thread_info (init_thread_union.thread_info)
|
|
#define init_stack (init_thread_union.stack)
|
|
|
|
/*
|
|
* Get the thread information struct from C.
|
|
* We do the usual trick and use the lower end of the stack for this
|
|
*/
|
|
static inline struct thread_info *current_thread_info(void)
|
|
{
|
|
unsigned long addr = ~(THREAD_SIZE - 1);
|
|
|
|
asm("and %0, sp" : "=r"(addr) : "0"(addr));
|
|
return (struct thread_info *)addr;
|
|
}
|
|
|
|
#define get_thread_info(ti) get_task_struct((ti)->task)
|
|
#define put_thread_info(ti) put_task_struct((ti)->task)
|
|
|
|
#endif /* !__ASSEMBLY__ */
|
|
|
|
#define PREEMPT_ACTIVE 0x40000000
|
|
|
|
/*
|
|
* 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_SIGPENDING 1 /* signal pending */
|
|
#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
|
|
#define TIF_POLLING_NRFLAG 3 /* true if poll_idle() is polling
|
|
TIF_NEED_RESCHED */
|
|
#define TIF_BREAKPOINT 4 /* enter monitor mode on return */
|
|
#define TIF_SINGLE_STEP 5 /* single step in progress */
|
|
#define TIF_MEMDIE 6
|
|
#define TIF_RESTORE_SIGMASK 7 /* restore signal mask in do_signal */
|
|
#define TIF_CPU_GOING_TO_SLEEP 8 /* CPU is entering sleep 0 mode */
|
|
#define TIF_FREEZE 29
|
|
#define TIF_DEBUG 30 /* debugging enabled */
|
|
#define TIF_USERSPACE 31 /* true if FS sets userspace */
|
|
|
|
#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
|
|
#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
|
|
#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
|
|
#define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
|
|
#define _TIF_SINGLE_STEP (1 << TIF_SINGLE_STEP)
|
|
#define _TIF_MEMDIE (1 << TIF_MEMDIE)
|
|
#define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK)
|
|
#define _TIF_CPU_GOING_TO_SLEEP (1 << TIF_CPU_GOING_TO_SLEEP)
|
|
|
|
/* Note: The masks below must never span more than 16 bits! */
|
|
|
|
/* work to do on interrupt/exception return */
|
|
#define _TIF_WORK_MASK \
|
|
((1 << TIF_SIGPENDING) \
|
|
| (1 << TIF_NEED_RESCHED) \
|
|
| (1 << TIF_POLLING_NRFLAG) \
|
|
| (1 << TIF_BREAKPOINT) \
|
|
| (1 << TIF_RESTORE_SIGMASK))
|
|
|
|
/* work to do on any return to userspace */
|
|
#define _TIF_ALLWORK_MASK (_TIF_WORK_MASK | (1 << TIF_SYSCALL_TRACE))
|
|
/* work to do on return from debug mode */
|
|
#define _TIF_DBGWORK_MASK (_TIF_WORK_MASK & ~(1 << TIF_BREAKPOINT))
|
|
|
|
#endif /* __ASM_AVR32_THREAD_INFO_H */
|