d8e7f201a4
Some of the assembly in the LoongArch port seem to come from a prehistoric time, when the assembler didn't even have support for the ABI names we all come to know and love, thus used raw register numbers which hampered readability. The usages are found with a regex match inside arch/loongarch, then manually adjusted for those non-definitions. Signed-off-by: WANG Xuerui <git@xen0n.name> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
106 lines
3.6 KiB
C
106 lines
3.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* thread_info.h: LoongArch low-level thread information
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*
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* Copyright (C) 2020-2022 Loongson Technology Corporation Limited
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*/
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#ifndef _ASM_THREAD_INFO_H
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#define _ASM_THREAD_INFO_H
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#ifdef __KERNEL__
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#ifndef __ASSEMBLY__
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#include <asm/processor.h>
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/*
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* low level task data that entry.S needs immediate access to
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* - this struct should fit entirely inside of one cache line
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* - this struct shares the supervisor stack pages
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* - if the contents of this structure are changed, the assembly constants
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* must also be changed
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*/
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struct thread_info {
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struct task_struct *task; /* main task structure */
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unsigned long flags; /* low level flags */
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unsigned long tp_value; /* thread pointer */
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__u32 cpu; /* current CPU */
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int preempt_count; /* 0 => preemptible, <0 => BUG */
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struct pt_regs *regs;
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unsigned long syscall; /* syscall number */
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unsigned long syscall_work; /* SYSCALL_WORK_ flags */
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};
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/*
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* macros/functions for gaining access to the thread information structure
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*/
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#define INIT_THREAD_INFO(tsk) \
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{ \
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.task = &tsk, \
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.flags = 0, \
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.cpu = 0, \
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.preempt_count = INIT_PREEMPT_COUNT, \
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}
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/* How to get the thread information struct from C. */
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register struct thread_info *__current_thread_info __asm__("$tp");
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static inline struct thread_info *current_thread_info(void)
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{
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return __current_thread_info;
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}
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register unsigned long current_stack_pointer __asm__("$sp");
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#endif /* !__ASSEMBLY__ */
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/* thread information allocation */
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#define THREAD_SIZE SZ_16K
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#define THREAD_MASK (THREAD_SIZE - 1UL)
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#define THREAD_SIZE_ORDER ilog2(THREAD_SIZE / PAGE_SIZE)
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/*
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* thread information flags
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* - these are process state flags that various assembly files may need to
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* access
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* - pending work-to-be-done flags are in LSW
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* - other flags in MSW
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*/
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#define TIF_SIGPENDING 1 /* signal pending */
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#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
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#define TIF_NOTIFY_RESUME 3 /* callback before returning to user */
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#define TIF_NOTIFY_SIGNAL 4 /* signal notifications exist */
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#define TIF_RESTORE_SIGMASK 5 /* restore signal mask in do_signal() */
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#define TIF_NOHZ 6 /* in adaptive nohz mode */
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#define TIF_UPROBE 7 /* breakpointed or singlestepping */
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#define TIF_USEDFPU 8 /* FPU was used by this task this quantum (SMP) */
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#define TIF_USEDSIMD 9 /* SIMD has been used this quantum */
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#define TIF_MEMDIE 10 /* is terminating due to OOM killer */
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#define TIF_FIXADE 11 /* Fix address errors in software */
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#define TIF_LOGADE 12 /* Log address errors to syslog */
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#define TIF_32BIT_REGS 13 /* 32-bit general purpose registers */
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#define TIF_32BIT_ADDR 14 /* 32-bit address space */
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#define TIF_LOAD_WATCH 15 /* If set, load watch registers */
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#define TIF_SINGLESTEP 16 /* Single Step */
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#define TIF_LSX_CTX_LIVE 17 /* LSX context must be preserved */
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#define TIF_LASX_CTX_LIVE 18 /* LASX context must be preserved */
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#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
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#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
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#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
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#define _TIF_NOTIFY_SIGNAL (1<<TIF_NOTIFY_SIGNAL)
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#define _TIF_NOHZ (1<<TIF_NOHZ)
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#define _TIF_UPROBE (1<<TIF_UPROBE)
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#define _TIF_USEDFPU (1<<TIF_USEDFPU)
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#define _TIF_USEDSIMD (1<<TIF_USEDSIMD)
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#define _TIF_FIXADE (1<<TIF_FIXADE)
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#define _TIF_LOGADE (1<<TIF_LOGADE)
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#define _TIF_32BIT_REGS (1<<TIF_32BIT_REGS)
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#define _TIF_32BIT_ADDR (1<<TIF_32BIT_ADDR)
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#define _TIF_LOAD_WATCH (1<<TIF_LOAD_WATCH)
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#define _TIF_SINGLESTEP (1<<TIF_SINGLESTEP)
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#define _TIF_LSX_CTX_LIVE (1<<TIF_LSX_CTX_LIVE)
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#define _TIF_LASX_CTX_LIVE (1<<TIF_LASX_CTX_LIVE)
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#endif /* __KERNEL__ */
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#endif /* _ASM_THREAD_INFO_H */
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