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/*
 * OpenRISC Linux
 *
 * Linux architectural port borrowing liberally from similar works of
 * others.  All original copyrights apply as per the original source
 * declaration.
 *
 * OpenRISC implementation:
 * Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com>
 * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
 * et al.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 */

#ifndef _ASM_THREAD_INFO_H
#define _ASM_THREAD_INFO_H

#ifdef __KERNEL__

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


/* THREAD_SIZE is the size of the task_struct/kernel_stack combo.
 * normally, the stack is found by doing something like p + THREAD_SIZE
 * in or32, a page is 8192 bytes, which seems like a sane size
 */

#define THREAD_SIZE_ORDER 0
#define THREAD_SIZE       (PAGE_SIZE << THREAD_SIZE_ORDER)

/*
 * 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 unsigned long mm_segment_t;

struct thread_info {
	struct task_struct	*task;		/* main task structure */
	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:
					       0-0x7FFFFFFF for user-thead
					       0-0xFFFFFFFF for kernel-thread
					     */
	__u8			supervisor_stack[0];

	/* saved context data */
	unsigned long           ksp;
};
#endif

/*
 * macros/functions for gaining access to the thread information structure
 *
 * preempt_count needs to be 1 initially, until the scheduler is functional.
 */
#ifndef __ASSEMBLY__
#define INIT_THREAD_INFO(tsk)				\
{							\
	.task		= &tsk,				\
	.flags		= 0,				\
	.cpu		= 0,				\
	.preempt_count	= INIT_PREEMPT_COUNT,		\
	.addr_limit	= KERNEL_DS,			\
	.ksp            = 0,                            \
}

#define init_thread_info	(init_thread_union.thread_info)

/* how to get the thread information struct from C */
register struct thread_info *current_thread_info_reg asm("r10");
#define current_thread_info()   (current_thread_info_reg)

#define get_thread_info(ti) get_task_struct((ti)->task)
#define put_thread_info(ti) put_task_struct((ti)->task)

#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 singlestep on return to user
					 * mode
					 */
#define TIF_SYSCALL_TRACEPOINT  8       /* for ftrace syscall instrumentation */
#define TIF_RESTORE_SIGMASK     9
#define TIF_POLLING_NRFLAG	16	/* true if poll_idle() is polling						 * TIF_NEED_RESCHED
					 */
#define TIF_MEMDIE              17

#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_POLLING_NRFLAG	(1<<TIF_POLLING_NRFLAG)


/* Work to do when returning from interrupt/exception */
/* For OpenRISC, this is anything in the LSW other than syscall trace */
#define _TIF_WORK_MASK (0xff & ~(_TIF_SYSCALL_TRACE|_TIF_SINGLESTEP))

#endif /* __KERNEL__ */

#endif /* _ASM_THREAD_INFO_H */

Filemanager

Name Type Size Permission Actions
bitops Folder 0755
Kbuild File 997 B 0644
asm-offsets.h File 35 B 0644
atomic.h File 3.02 KB 0644
barrier.h File 203 B 0644
bitops.h File 1.5 KB 0644
cache.h File 888 B 0644
cacheflush.h File 3.37 KB 0644
cmpxchg.h File 3.92 KB 0644
cpuinfo.h File 970 B 0644
delay.h File 670 B 0644
dma-mapping.h File 968 B 0644
elf.h File 2.02 KB 0644
fixmap.h File 2.74 KB 0644
futex.h File 2.24 KB 0644
io.h File 1.31 KB 0644
irq.h File 835 B 0644
irqflags.h File 866 B 0644
linkage.h File 764 B 0644
mmu.h File 728 B 0644
mmu_context.h File 1.3 KB 0644
page.h File 2.54 KB 0644
pgalloc.h File 2.57 KB 0644
pgtable.h File 13.96 KB 0644
processor.h File 2.7 KB 0644
ptrace.h File 3.33 KB 0644
serial.h File 1.11 KB 0644
smp.h File 822 B 0644
spinlock.h File 985 B 0644
spinlock_types.h File 188 B 0644
spr.h File 1.17 KB 0644
spr_defs.h File 22.91 KB 0644
string.h File 324 B 0644
syscall.h File 1.91 KB 0644
syscalls.h File 1.04 KB 0644
thread_info.h File 3.85 KB 0644
time.h File 627 B 0644
timex.h File 914 B 0644
tlb.h File 1.01 KB 0644
tlbflush.h File 2.05 KB 0644
uaccess.h File 7.98 KB 0644
unaligned.h File 1.7 KB 0644
unwinder.h File 557 B 0644