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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ASM_SH_THREAD_INFO_H
#define __ASM_SH_THREAD_INFO_H

/* SuperH version
 * Copyright (C) 2002  Niibe Yutaka
 *
 * The copyright of original i386 version is:
 *
 *  Copyright (C) 2002  David Howells (dhowells@redhat.com)
 *  - Incorporating suggestions made by Linus Torvalds and Dave Miller
 */
#ifdef __KERNEL__

#include <asm/page.h>

/*
 * Page fault error code bits
 */
#define FAULT_CODE_WRITE	(1 << 0)	/* write access */
#define FAULT_CODE_INITIAL	(1 << 1)	/* initial page write */
#define FAULT_CODE_ITLB		(1 << 2)	/* ITLB miss */
#define FAULT_CODE_PROT		(1 << 3)	/* protection fault */
#define FAULT_CODE_USER		(1 << 4)	/* user-mode access */

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

struct thread_info {
	struct task_struct	*task;		/* main task structure */
	unsigned long		flags;		/* low level flags */
	__u32			status;		/* thread synchronous flags */
	__u32			cpu;
	int			preempt_count; /* 0 => preemptable, <0 => BUG */
	mm_segment_t		addr_limit;	/* thread address space */
	unsigned long		previous_sp;	/* sp of previous stack in case
						   of nested IRQ stacks */
	__u8			supervisor_stack[0];
};

#endif

#if defined(CONFIG_4KSTACKS)
#define THREAD_SHIFT	12
#else
#define THREAD_SHIFT	13
#endif

#define THREAD_SIZE	(1 << THREAD_SHIFT)
#define STACK_WARN	(THREAD_SIZE >> 3)

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

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

/* how to get the current stack pointer from C */
register unsigned long current_stack_pointer asm("r15") __used;

/* how to get the thread information struct from C */
static inline struct thread_info *current_thread_info(void)
{
	struct thread_info *ti;
#if defined(CONFIG_SUPERH64)
	__asm__ __volatile__ ("getcon	cr17, %0" : "=r" (ti));
#elif defined(CONFIG_CPU_HAS_SR_RB)
	__asm__ __volatile__ ("stc	r7_bank, %0" : "=r" (ti));
#else
	unsigned long __dummy;

	__asm__ __volatile__ (
		"mov	r15, %0\n\t"
		"and	%1, %0\n\t"
		: "=&r" (ti), "=r" (__dummy)
		: "1" (~(THREAD_SIZE - 1))
		: "memory");
#endif

	return ti;
}

#define THREAD_SIZE_ORDER	(THREAD_SHIFT - PAGE_SHIFT)

extern void arch_task_cache_init(void);
extern int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src);
extern void arch_release_task_struct(struct task_struct *tsk);
extern void init_thread_xstate(void);

#endif /* __ASSEMBLY__ */

/*
 * Thread information flags
 *
 * - Limited to 24 bits, upper byte used for fault code encoding.
 *
 * - _TIF_ALLWORK_MASK and _TIF_WORK_MASK need to fit within 2 bytes, or
 *   we blow the tst immediate size constraints and need to fix up
 *   arch/sh/kernel/entry-common.S.
 */
#define TIF_SYSCALL_TRACE	0	/* syscall trace active */
#define TIF_SIGPENDING		1	/* signal pending */
#define TIF_NEED_RESCHED	2	/* rescheduling necessary */
#define TIF_SINGLESTEP		4	/* singlestepping active */
#define TIF_SYSCALL_AUDIT	5	/* syscall auditing active */
#define TIF_SECCOMP		6	/* secure computing */
#define TIF_NOTIFY_RESUME	7	/* callback before returning to user */
#define TIF_SYSCALL_TRACEPOINT	8	/* for ftrace syscall instrumentation */
#define TIF_POLLING_NRFLAG	17	/* true if poll_idle() is polling TIF_NEED_RESCHED */
#define TIF_MEMDIE		18	/* is terminating due to OOM killer */

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

/* work to do in syscall trace */
#define _TIF_WORK_SYSCALL_MASK	(_TIF_SYSCALL_TRACE | _TIF_SINGLESTEP | \
				 _TIF_SYSCALL_AUDIT | _TIF_SECCOMP    | \
				 _TIF_SYSCALL_TRACEPOINT)

/* work to do on any return to u-space */
#define _TIF_ALLWORK_MASK	(_TIF_SYSCALL_TRACE | _TIF_SIGPENDING      | \
				 _TIF_NEED_RESCHED  | _TIF_SYSCALL_AUDIT   | \
				 _TIF_SINGLESTEP    | _TIF_NOTIFY_RESUME   | \
				 _TIF_SYSCALL_TRACEPOINT)

/* work to do on interrupt/exception return */
#define _TIF_WORK_MASK		(_TIF_ALLWORK_MASK & ~(_TIF_SYSCALL_TRACE | \
				 _TIF_SYSCALL_AUDIT | _TIF_SINGLESTEP))

/*
 * 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.
 */
#define TS_USEDFPU		0x0002	/* FPU used by this task this quantum */

#ifndef __ASSEMBLY__

#define TI_FLAG_FAULT_CODE_SHIFT	24

/*
 * Additional thread flag encoding
 */
static inline void set_thread_fault_code(unsigned int val)
{
	struct thread_info *ti = current_thread_info();
	ti->flags = (ti->flags & (~0 >> (32 - TI_FLAG_FAULT_CODE_SHIFT)))
		| (val << TI_FLAG_FAULT_CODE_SHIFT);
}

static inline unsigned int get_thread_fault_code(void)
{
	struct thread_info *ti = current_thread_info();
	return ti->flags >> TI_FLAG_FAULT_CODE_SHIFT;
}

#endif	/* !__ASSEMBLY__ */

#endif /* __KERNEL__ */

#endif /* __ASM_SH_THREAD_INFO_H */

Filemanager

Name Type Size Permission Actions
Kbuild File 467 B 0644
adc.h File 253 B 0644
addrspace.h File 2.03 KB 0644
alignment.h File 654 B 0644
asm-offsets.h File 35 B 0644
atomic-grb.h File 2.6 KB 0644
atomic-irq.h File 1.63 KB 0644
atomic-llsc.h File 2.12 KB 0644
atomic.h File 1.78 KB 0644
barrier.h File 1.52 KB 0644
bitops-cas.h File 1.73 KB 0644
bitops-grb.h File 6.21 KB 0644
bitops-llsc.h File 2.79 KB 0644
bitops-op32.h File 3.78 KB 0644
bitops.h File 2.38 KB 0644
bl_bit.h File 216 B 0644
bl_bit_32.h File 639 B 0644
bl_bit_64.h File 979 B 0644
bug.h File 2.77 KB 0644
bugs.h File 1.38 KB 0644
cache.h File 1.2 KB 0644
cache_insns.h File 242 B 0644
cache_insns_32.h File 642 B 0644
cache_insns_64.h File 839 B 0644
cacheflush.h File 3.58 KB 0644
checksum.h File 140 B 0644
checksum_32.h File 5.21 KB 0644
clock.h File 436 B 0644
cmpxchg-cas.h File 549 B 0644
cmpxchg-grb.h File 2.8 KB 0644
cmpxchg-irq.h File 1.04 KB 0644
cmpxchg-llsc.h File 1.06 KB 0644
cmpxchg-xchg.h File 1.33 KB 0644
cmpxchg.h File 1.77 KB 0644
device.h File 450 B 0644
dma-mapping.h File 694 B 0644
dma-register.h File 1.8 KB 0644
dma.h File 3.74 KB 0644
dmabrg.h File 536 B 0644
dwarf.h File 9.8 KB 0644
elf.h File 7.28 KB 0644
entry-macros.S File 1.85 KB 0644
extable.h File 227 B 0644
fb.h File 375 B 0644
fixmap.h File 2.92 KB 0644
flat.h File 1.23 KB 0644
fpu.h File 1.77 KB 0644
freq.h File 472 B 0644
ftrace.h File 1.11 KB 0644
futex-cas.h File 728 B 0644
futex-irq.h File 482 B 0644
futex-llsc.h File 870 B 0644
futex.h File 1.5 KB 0644
gpio.h File 1017 B 0644
hardirq.h File 440 B 0644
hd64461.h File 11.79 KB 0644
heartbeat.h File 383 B 0644
hugetlb.h File 1.96 KB 0644
hw_breakpoint.h File 1.88 KB 0644
hw_irq.h File 915 B 0644
i2c-sh7760.h File 406 B 0644
io.h File 11.33 KB 0644
io_generic.h File 661 B 0644
io_noioport.h File 1.09 KB 0644
io_trapped.h File 1.44 KB 0644
irq.h File 1.68 KB 0644
irqflags.h File 226 B 0644
kdebug.h File 406 B 0644
kexec.h File 2.61 KB 0644
kgdb.h File 851 B 0644
kmap_types.h File 265 B 0644
kprobes.h File 1.51 KB 0644
linkage.h File 154 B 0644
machvec.h File 939 B 0644
mmu.h File 2.18 KB 0644
mmu_context.h File 4.44 KB 0644
mmu_context_32.h File 1.28 KB 0644
mmu_context_64.h File 1.97 KB 0644
mmzone.h File 1.1 KB 0644
module.h File 1005 B 0644
page.h File 6.06 KB 0644
pci.h File 3.19 KB 0644
perf_event.h File 797 B 0644
pgalloc.h File 1.86 KB 0644
pgtable-2level.h File 598 B 0644
pgtable-3level.h File 1.54 KB 0644
pgtable.h File 4 KB 0644
pgtable_32.h File 16.37 KB 0644
pgtable_64.h File 11.32 KB 0644
posix_types.h File 146 B 0644
processor.h File 4.41 KB 0644
processor_32.h File 4.67 KB 0644
processor_64.h File 5.54 KB 0644
ptrace.h File 3.39 KB 0644
ptrace_32.h File 307 B 0644
ptrace_64.h File 312 B 0644
push-switch.h File 755 B 0644
reboot.h File 472 B 0644
romimage-macros.h File 1.1 KB 0644
rtc.h File 383 B 0644
seccomp.h File 280 B 0644
sections.h File 311 B 0644
segment.h File 879 B 0644
setup.h File 725 B 0644
sfp-machine.h File 3.43 KB 0644
sh7760fb.h File 5.61 KB 0644
sh_bios.h File 743 B 0644
shmparam.h File 629 B 0644
siu.h File 539 B 0644
smc37c93x.h File 5.56 KB 0644
smp-ops.h File 1012 B 0644
smp.h File 1.83 KB 0644
sparsemem.h File 443 B 0644
spi.h File 265 B 0644
spinlock-cas.h File 2.09 KB 0644
spinlock-llsc.h File 4.13 KB 0644
spinlock.h File 578 B 0644
spinlock_types.h File 463 B 0644
sram.h File 670 B 0644
stackprotector.h File 711 B 0644
stacktrace.h File 606 B 0644
string.h File 131 B 0644
string_32.h File 2.66 KB 0644
string_64.h File 499 B 0644
suspend.h File 2.52 KB 0644
switch_to.h File 492 B 0644
switch_to_32.h File 3.55 KB 0644
switch_to_64.h File 968 B 0644
syscall.h File 267 B 0644
syscall_32.h File 2.42 KB 0644
syscall_64.h File 1.79 KB 0644
syscalls.h File 564 B 0644
syscalls_32.h File 1022 B 0644
syscalls_64.h File 441 B 0644
thread_info.h File 5.32 KB 0644
timex.h File 637 B 0644
tlb.h File 4.12 KB 0644
tlb_64.h File 2.08 KB 0644
tlbflush.h File 1.77 KB 0644
topology.h File 645 B 0644
traps.h File 487 B 0644
traps_32.h File 1.31 KB 0644
traps_64.h File 851 B 0644
types.h File 411 B 0644
uaccess.h File 4.83 KB 0644
uaccess_32.h File 3.77 KB 0644
uaccess_64.h File 2.2 KB 0644
unaligned-sh4a.h File 4.51 KB 0644
unaligned.h File 359 B 0644
uncached.h File 1.34 KB 0644
unistd.h File 952 B 0644
unwinder.h File 856 B 0644
user.h File 2.52 KB 0644
vga.h File 98 B 0644
vmlinux.lds.h File 558 B 0644
watchdog.h File 4.14 KB 0644
word-at-a-time.h File 1.29 KB 0644