134 lines
4.3 KiB
C
134 lines
4.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_SW64_THREAD_INFO_H
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#define _ASM_SW64_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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#include <asm/types.h>
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#include <asm/sysinfo.h>
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struct pcb_struct {
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unsigned long ksp;
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unsigned long usp;
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unsigned long ptbr;
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unsigned int pcc;
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unsigned int asn;
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unsigned long unique;
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unsigned long flags;
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unsigned long da_match, da_mask;
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unsigned long dv_match, dv_mask;
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unsigned long dc_ctl;
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};
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struct thread_info {
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struct pcb_struct pcb; /* hmcode state */
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struct task_struct *task; /* main task structure */
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unsigned int flags; /* low level flags */
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unsigned int ieee_state; /* see fpu.h */
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mm_segment_t addr_limit; /* thread address space */
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unsigned int cpu; /* current CPU */
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int preempt_count; /* 0 => preemptible, <0 => BUG */
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unsigned int status; /* thread-synchronous flags */
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int bpt_nsaved;
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unsigned long bpt_addr[2]; /* breakpoint handling */
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unsigned int bpt_insn[2];
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#ifdef CONFIG_DYNAMIC_FTRACE
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unsigned long dyn_ftrace_addr;
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#endif
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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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.addr_limit = KERNEL_DS, \
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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__("$8");
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#define current_thread_info() __current_thread_info
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#endif /* __ASSEMBLY__ */
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/* Thread information allocation. */
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#define THREAD_SIZE_ORDER 1
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#define THREAD_SIZE (2 * PAGE_SIZE)
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/*
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* Thread information flags:
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* - these are process state flags and used from assembly
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* - pending work-to-be-done flags come first and must be assigned to be
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* within bits 0 to 7 to fit in and immediate operand.
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*
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* TIF_SYSCALL_TRACE is known to be 0 via blbs.
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*/
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#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
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#define TIF_NOTIFY_RESUME 1 /* callback before returning to user */
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#define TIF_SIGPENDING 2 /* signal pending */
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#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
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#define TIF_SYSCALL_AUDIT 4 /* syscall audit active */
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#define TIF_UPROBE 5 /* uprobe breakpoint or singlestep */
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#define TIF_DIE_IF_KERNEL 9 /* dik recursion lock */
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#define TIF_SYSCALL_TRACEPOINT 10
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#define TIF_SECCOMP 11 /* secure computing */
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#define TIF_MEMDIE 13 /* is terminating due to OOM killer */
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#define TIF_POLLING_NRFLAG 14 /* idle is polling for TIF_NEED_RESCHED */
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#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
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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_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
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#define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
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#define _TIF_SECCOMP (1 << TIF_SECCOMP)
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#define _TIF_SYSCALL_TRACEPOINT (1 << TIF_SYSCALL_TRACEPOINT)
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#define _TIF_UPROBE (1 << TIF_UPROBE)
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/* Work to do on interrupt/exception return. */
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#define _TIF_WORK_MASK (_TIF_SIGPENDING | _TIF_NEED_RESCHED | \
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_TIF_NOTIFY_RESUME | _TIF_UPROBE)
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#define _TIF_SYSCALL_WORK (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | \
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_TIF_SYSCALL_TRACEPOINT | _TIF_SECCOMP)
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/* Work to do on any return to userspace. */
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#define _TIF_ALLWORK_MASK (_TIF_WORK_MASK | _TIF_SYSCALL_TRACE)
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#define TS_UAC_NOPRINT 0x0001 /* ! Preserve the following three */
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#define TS_UAC_NOFIX 0x0002 /* ! flags as they match */
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#define TS_UAC_SIGBUS 0x0004 /* ! userspace part of 'prctl' */
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#define SET_UNALIGN_CTL(task, value) ({ \
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__u32 status = task_thread_info(task)->status & ~UAC_BITMASK; \
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if (value & PR_UNALIGN_NOPRINT) \
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status |= TS_UAC_NOPRINT; \
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if (value & PR_UNALIGN_SIGBUS) \
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status |= TS_UAC_SIGBUS; \
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if (value & PR_NOFIX) /* sw-specific */ \
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status |= TS_UAC_NOFIX; \
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task_thread_info(task)->status = status; \
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0; })
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#define GET_UNALIGN_CTL(task, value) ({ \
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__u32 status = task_thread_info(task)->status & ~UAC_BITMASK; \
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__u32 res = 0; \
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if (status & TS_UAC_NOPRINT) \
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res |= PR_UNALIGN_NOPRINT; \
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if (status & TS_UAC_SIGBUS) \
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res |= PR_UNALIGN_SIGBUS; \
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if (status & TS_UAC_NOFIX) \
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res |= PR_NOFIX; \
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put_user(res, (int __user *)(value)); \
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})
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#endif /* __KERNEL__ */
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#endif /* _ASM_SW64_THREAD_INFO_H */
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