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/*
 * Thread support for the Hexagon architecture
 *
 * Copyright (c) 2010-2011, The Linux Foundation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 and
 * only version 2 as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA.
 */

#ifndef _ASM_THREAD_INFO_H
#define _ASM_THREAD_INFO_H

#ifdef __KERNEL__

#ifndef __ASSEMBLY__
#include <asm/processor.h>
#include <asm/registers.h>
#include <asm/page.h>
#endif

#define THREAD_SHIFT		12
#define THREAD_SIZE		(1<<THREAD_SHIFT)
#define THREAD_SIZE_ORDER	(THREAD_SHIFT - PAGE_SHIFT)

#ifndef __ASSEMBLY__

typedef struct {
	unsigned long seg;
} mm_segment_t;

/*
 * This is union'd with the "bottom" of the kernel stack.
 * It keeps track of thread info which is handy for routines
 * to access quickly.
 */

struct thread_info {
	struct task_struct	*task;		/* main task structure */
	unsigned long		flags;          /* low level flags */
	__u32                   cpu;            /* current cpu */
	int                     preempt_count;  /* 0=>preemptible,<0=>BUG */
	mm_segment_t            addr_limit;     /* segmentation sux */
	/*
	 * used for syscalls somehow;
	 * seems to have a function pointer and four arguments
	 */
	/* Points to the current pt_regs frame  */
	struct pt_regs		*regs;
	/*
	 * saved kernel sp at switch_to time;
	 * not sure if this is used (it's not in the VM model it seems;
	 * see thread_struct)
	 */
	unsigned long		sp;
};

#else /* !__ASSEMBLY__ */

#include <asm/asm-offsets.h>

#endif  /* __ASSEMBLY__  */

#ifndef __ASSEMBLY__

#define INIT_THREAD_INFO(tsk)                   \
{                                               \
	.task           = &tsk,                 \
	.flags          = 0,                    \
	.cpu            = 0,                    \
	.preempt_count  = 1,                    \
	.addr_limit     = KERNEL_DS,            \
	.sp = 0,				\
	.regs = NULL,			\
}

#define init_thread_info        (init_thread_union.thread_info)
#define init_stack              (init_thread_union.stack)

/* Tacky preprocessor trickery */
#define	qqstr(s) qstr(s)
#define qstr(s) #s
#define QUOTED_THREADINFO_REG qqstr(THREADINFO_REG)

register struct thread_info *__current_thread_info asm(QUOTED_THREADINFO_REG);
#define current_thread_info()  __current_thread_info

#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 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 ss @ return to usr mode */
#define TIF_RESTORE_SIGMASK     6       /* restore sig mask in do_signal() */
/* true if poll_idle() is polling TIF_NEED_RESCHED */
#define TIF_MEMDIE              17      /* OOM killer killed process */

#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)

/* work to do on interrupt/exception return - All but TIF_SYSCALL_TRACE */
#define _TIF_WORK_MASK          (0x0000FFFF & ~_TIF_SYSCALL_TRACE)

/* work to do on any return to u-space */
#define _TIF_ALLWORK_MASK       0x0000FFFF

#endif /* __KERNEL__ */

#endif

Filemanager

Name Type Size Permission Actions
Kbuild File 886 B 0644
asm-offsets.h File 35 B 0644
atomic.h File 5.27 KB 0644
bitops.h File 6.62 KB 0644
cache.h File 1.16 KB 0644
cacheflush.h File 3.8 KB 0644
checksum.h File 1.61 KB 0644
cmpxchg.h File 2.55 KB 0644
delay.h File 978 B 0644
dma-mapping.h File 1.31 KB 0644
dma.h File 934 B 0644
elf.h File 6.34 KB 0644
exec.h File 1.01 KB 0644
fixmap.h File 1.11 KB 0644
fpu.h File 90 B 0644
futex.h File 2.25 KB 0644
hexagon_vm.h File 6.39 KB 0644
intrinsics.h File 1003 B 0644
io.h File 6.95 KB 0644
irq.h File 1.13 KB 0644
irqflags.h File 1.46 KB 0644
kgdb.h File 1.36 KB 0644
linkage.h File 871 B 0644
mem-layout.h File 3.42 KB 0644
mmu.h File 1.1 KB 0644
mmu_context.h File 2.59 KB 0644
module.h File 910 B 0644
page.h File 4.74 KB 0644
perf_event.h File 841 B 0644
pgalloc.h File 4.08 KB 0644
pgtable.h File 14.15 KB 0644
processor.h File 3.8 KB 0644
smp.h File 1.31 KB 0644
spinlock.h File 3.84 KB 0644
spinlock_types.h File 1.15 KB 0644
string.h File 1.08 KB 0644
suspend.h File 872 B 0644
switch_to.h File 1.09 KB 0644
syscall.h File 1.38 KB 0644
thread_info.h File 4.05 KB 0644
time.h File 980 B 0644
timer-regs.h File 1.23 KB 0644
timex.h File 1.13 KB 0644
tlb.h File 1.21 KB 0644
tlbflush.h File 2.08 KB 0644
traps.h File 1.02 KB 0644
uaccess.h File 3.67 KB 0644
vdso.h File 941 B 0644
vm_fault.h File 993 B 0644
vm_mmu.h File 3.37 KB 0644