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/*
 * Copyright (C) 2002  David Howells (dhowells@redhat.com)
 * Copyright 2010 Tilera Corporation. 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
 *   as published by the Free Software Foundation, version 2.
 *
 *   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, GOOD TITLE or
 *   NON INFRINGEMENT.  See the GNU General Public License for
 *   more details.
 */

#ifndef _ASM_TILE_THREAD_INFO_H
#define _ASM_TILE_THREAD_INFO_H

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

/*
 * Low level task data that assembly code needs immediate access to.
 * The structure is placed at the bottom of the supervisor stack.
 */
struct thread_info {
	struct task_struct	*task;		/* main task structure */
	unsigned long		flags;		/* low level flags */
	unsigned long		status;		/* thread-synchronous flags */
	__u32			homecache_cpu;	/* CPU we are homecached on */
	__u32			cpu;		/* current CPU */
	int			preempt_count;	/* 0 => preemptable,
						   <0 => BUG */

	mm_segment_t		addr_limit;	/* thread address space
						   (KERNEL_DS or USER_DS) */
	struct single_step_state *step_state;	/* single step state
						   (if non-zero) */
	int			align_ctl;	/* controls unaligned access */
#ifdef __tilegx__
	unsigned long		unalign_jit_tmp[4]; /* temp r0..r3 storage */
	void __user		*unalign_jit_base; /* unalign fixup JIT base */
#endif
	bool in_backtrace;			/* currently doing backtrace? */
};

/*
 * macros/functions for gaining access to the thread information structure.
 */
#define INIT_THREAD_INFO(tsk)			\
{						\
	.task		= &tsk,			\
	.flags		= 0,			\
	.cpu		= 0,			\
	.preempt_count	= INIT_PREEMPT_COUNT,	\
	.addr_limit	= KERNEL_DS,		\
	.step_state	= NULL,			\
	.align_ctl	= 0,			\
}

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

#endif /* !__ASSEMBLY__ */

#if PAGE_SIZE < 8192
#define THREAD_SIZE_ORDER (13 - PAGE_SHIFT)
#else
#define THREAD_SIZE_ORDER (0)
#endif
#define THREAD_SIZE_PAGES (1 << THREAD_SIZE_ORDER)

#define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER)
#define LOG2_THREAD_SIZE (PAGE_SHIFT + THREAD_SIZE_ORDER)

#define STACK_WARN             (THREAD_SIZE/8)

#ifndef __ASSEMBLY__

void arch_release_thread_stack(unsigned long *stack);

/* How to get the thread information struct from C. */
register unsigned long stack_pointer __asm__("sp");

#define current_thread_info() \
  ((struct thread_info *)(stack_pointer & -THREAD_SIZE))

/* Sit on a nap instruction until interrupted. */
extern void smp_nap(void);

/* Enable interrupts racelessly and nap forever: helper for arch_cpu_idle(). */
extern void _cpu_idle(void);

#else /* __ASSEMBLY__ */

/*
 * How to get the thread information struct from assembly.
 * Note that we use different macros since different architectures
 * have different semantics in their "mm" instruction and we would
 * like to guarantee that the macro expands to exactly one instruction.
 */
#ifdef __tilegx__
#define EXTRACT_THREAD_INFO(reg) mm reg, zero, LOG2_THREAD_SIZE, 63
#else
#define GET_THREAD_INFO(reg) mm reg, sp, zero, LOG2_THREAD_SIZE, 31
#endif

#endif /* !__ASSEMBLY__ */

/*
 * Thread information flags that various assembly files may need to access.
 * Keep flags accessed frequently in low bits, particular since it makes
 * it easier to build constants in assembly.
 */
#define TIF_SIGPENDING		0	/* signal pending */
#define TIF_NEED_RESCHED	1	/* rescheduling necessary */
#define TIF_SINGLESTEP		2	/* restore singlestep on return to
					   user mode */
#define TIF_ASYNC_TLB		3	/* got an async TLB fault in kernel */
#define TIF_SYSCALL_TRACE	4	/* syscall trace active */
#define TIF_SYSCALL_AUDIT	5	/* syscall auditing active */
#define TIF_SECCOMP		6	/* secure computing */
#define TIF_MEMDIE		7	/* OOM killer at work */
#define TIF_NOTIFY_RESUME	8	/* callback before returning to user */
#define TIF_SYSCALL_TRACEPOINT	9	/* syscall tracepoint instrumentation */
#define TIF_POLLING_NRFLAG	10	/* idle is polling for TIF_NEED_RESCHED */
#define TIF_NOHZ		11	/* in adaptive nohz mode */

#define _TIF_SIGPENDING		(1<<TIF_SIGPENDING)
#define _TIF_NEED_RESCHED	(1<<TIF_NEED_RESCHED)
#define _TIF_SINGLESTEP		(1<<TIF_SINGLESTEP)
#define _TIF_ASYNC_TLB		(1<<TIF_ASYNC_TLB)
#define _TIF_SYSCALL_TRACE	(1<<TIF_SYSCALL_TRACE)
#define _TIF_SYSCALL_AUDIT	(1<<TIF_SYSCALL_AUDIT)
#define _TIF_SECCOMP		(1<<TIF_SECCOMP)
#define _TIF_MEMDIE		(1<<TIF_MEMDIE)
#define _TIF_NOTIFY_RESUME	(1<<TIF_NOTIFY_RESUME)
#define _TIF_SYSCALL_TRACEPOINT	(1<<TIF_SYSCALL_TRACEPOINT)
#define _TIF_POLLING_NRFLAG	(1<<TIF_POLLING_NRFLAG)
#define _TIF_NOHZ		(1<<TIF_NOHZ)

/* Work to do as we loop to exit to user space. */
#define _TIF_WORK_MASK \
	(_TIF_SIGPENDING | _TIF_NEED_RESCHED | \
	 _TIF_ASYNC_TLB | _TIF_NOTIFY_RESUME)

/* Work to do on any return to user space. */
#define _TIF_ALLWORK_MASK \
	(_TIF_WORK_MASK | _TIF_SINGLESTEP | _TIF_NOHZ)

/* Work to do at syscall entry. */
#define _TIF_SYSCALL_ENTRY_WORK \
	(_TIF_SYSCALL_TRACE | _TIF_SYSCALL_TRACEPOINT | _TIF_NOHZ)

/* Work to do at syscall exit. */
#define _TIF_SYSCALL_EXIT_WORK (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_TRACEPOINT)

/*
 * Thread-synchronous status.
 *
 * This is different from the flags in that nobody else
 * ever touches our thread-synchronous status, so we don't
 * have to worry about atomic accesses.
 */
#ifdef __tilegx__
#define TS_COMPAT		0x0001	/* 32-bit compatibility mode */
#endif

#endif /* _ASM_TILE_THREAD_INFO_H */

Filemanager

Name Type Size Permission Actions
Kbuild File 439 B 0644
asm-offsets.h File 35 B 0644
atomic.h File 5.14 KB 0644
atomic_32.h File 8.91 KB 0644
atomic_64.h File 5.51 KB 0644
backtrace.h File 3.98 KB 0644
barrier.h File 2.89 KB 0644
bitops.h File 2.37 KB 0644
bitops_32.h File 4.01 KB 0644
bitops_64.h File 2.67 KB 0644
cache.h File 2.6 KB 0644
cacheflush.h File 4.94 KB 0644
checksum.h File 1.23 KB 0644
cmpxchg.h File 3.47 KB 0644
compat.h File 7.38 KB 0644
current.h File 947 B 0644
delay.h File 1.1 KB 0644
device.h File 978 B 0644
div64.h File 319 B 0644
dma-mapping.h File 1.82 KB 0644
dma.h File 762 B 0644
elf.h File 5.42 KB 0644
fixmap.h File 2.73 KB 0644
ftrace.h File 1.08 KB 0644
futex.h File 4.23 KB 0644
hardirq.h File 1.28 KB 0644
hardwall.h File 1.08 KB 0644
highmem.h File 2.08 KB 0644
homecache.h File 4.21 KB 0644
hugetlb.h File 3.04 KB 0644
hv_driver.h File 1.92 KB 0644
ide.h File 758 B 0644
insn.h File 1.79 KB 0644
io.h File 12.43 KB 0644
irq.h File 3.11 KB 0644
irq_work.h File 283 B 0644
irqflags.h File 10.55 KB 0644
jump_label.h File 1.47 KB 0644
kdebug.h File 769 B 0644
kexec.h File 2.23 KB 0644
kgdb.h File 1.99 KB 0644
kmap_types.h File 1.02 KB 0644
kprobes.h File 2.19 KB 0644
linkage.h File 1.46 KB 0644
mmu.h File 965 B 0644
mmu_context.h File 4.5 KB 0644
mmzone.h File 2.07 KB 0644
module.h File 1.12 KB 0644
page.h File 10.32 KB 0644
pci.h File 6.58 KB 0644
percpu.h File 1.79 KB 0644
perf_event.h File 766 B 0644
pgalloc.h File 4.76 KB 0644
pgtable.h File 15.66 KB 0644
pgtable_32.h File 4.08 KB 0644
pgtable_64.h File 5.11 KB 0644
pmc.h File 2.15 KB 0644
processor.h File 10.62 KB 0644
ptrace.h File 2.96 KB 0644
sections.h File 1.37 KB 0644
setup.h File 1.63 KB 0644
sigframe.h File 956 B 0644
signal.h File 1.07 KB 0644
smp.h File 3.98 KB 0644
spinlock.h File 741 B 0644
spinlock_32.h File 2.9 KB 0644
spinlock_64.h File 3.88 KB 0644
spinlock_types.h File 1.58 KB 0644
stack.h File 2.59 KB 0644
string.h File 1.19 KB 0644
switch_to.h File 2.75 KB 0644
syscall.h File 2.88 KB 0644
syscalls.h File 2.35 KB 0644
thread_info.h File 5.54 KB 0644
tile-desc.h File 650 B 0644
tile-desc_32.h File 12.54 KB 0644
tile-desc_64.h File 10.83 KB 0644
timex.h File 1.71 KB 0644
tlb.h File 878 B 0644
tlbflush.h File 3.99 KB 0644
topology.h File 1.52 KB 0644
traps.h File 2.44 KB 0644
uaccess.h File 12.77 KB 0644
unaligned.h File 1.56 KB 0644
unistd.h File 777 B 0644
user.h File 717 B 0644
vdso.h File 1.84 KB 0644
vga.h File 1.05 KB 0644
word-at-a-time.h File 1.07 KB 0644