name : thread_info_32.h /* SPDX-License-Identifier: GPL-2.0 */ /* * thread_info.h: sparc low-level thread information * adapted from the ppc version by Pete Zaitcev, which was * adapted from the i386 version by Paul Mackerras * * Copyright (C) 2002 David Howells (dhowells@redhat.com) * Copyright (c) 2002 Pete Zaitcev (zaitcev@yahoo.com) * - Incorporating suggestions made by Linus Torvalds and Dave Miller */ #ifndef _ASM_THREAD_INFO_H #define _ASM_THREAD_INFO_H #ifdef __KERNEL__ #ifndef __ASSEMBLY__ #include <asm/ptrace.h> #include <asm/page.h> /* * Low level task data. * * If you change this, change the TI_* offsets below to match. */ #define NSWINS 8 struct thread_info { unsigned long uwinmask; struct task_struct *task; /* main task structure */ unsigned long flags; /* low level flags */ int cpu; /* cpu we're on */ int preempt_count; /* 0 => preemptable, <0 => BUG */ int softirq_count; int hardirq_count; u32 __unused; /* Context switch saved kernel state. */ unsigned long ksp; /* ... ksp __attribute__ ((aligned (8))); */ unsigned long kpc; unsigned long kpsr; unsigned long kwim; /* A place to store user windows and stack pointers * when the stack needs inspection. */ struct reg_window32 reg_window[NSWINS]; /* align for ldd! */ unsigned long rwbuf_stkptrs[NSWINS]; unsigned long w_saved; }; /* * macros/functions for gaining access to the thread information structure */ #define INIT_THREAD_INFO(tsk) \ { \ .uwinmask = 0, \ .task = &tsk, \ .flags = 0, \ .cpu = 0, \ .preempt_count = INIT_PREEMPT_COUNT, \ } /* how to get the thread information struct from C */ register struct thread_info *current_thread_info_reg asm("g6"); #define current_thread_info() (current_thread_info_reg) /* * thread information allocation */ #define THREAD_SIZE_ORDER 1 #endif /* __ASSEMBLY__ */ /* Size of kernel stack for each process */ #define THREAD_SIZE (2 * PAGE_SIZE) /* * Offsets in thread_info structure, used in assembly code * The "#define REGWIN_SZ 0x40" was abolished, so no multiplications. */ #define TI_UWINMASK 0x00 /* uwinmask */ #define TI_TASK 0x04 #define TI_FLAGS 0x08 #define TI_CPU 0x0c #define TI_PREEMPT 0x10 /* preempt_count */ #define TI_SOFTIRQ 0x14 /* softirq_count */ #define TI_HARDIRQ 0x18 /* hardirq_count */ #define TI_KSP 0x20 /* ksp */ #define TI_KPC 0x24 /* kpc (ldd'ed with kpc) */ #define TI_KPSR 0x28 /* kpsr */ #define TI_KWIM 0x2c /* kwim (ldd'ed with kpsr) */ #define TI_REG_WINDOW 0x30 #define TI_RWIN_SPTRS 0x230 #define TI_W_SAVED 0x250 /* * thread information flag bit numbers */ #define TIF_SYSCALL_TRACE 0 /* syscall trace active */ #define TIF_NOTIFY_RESUME 1 /* callback before returning to user */ #define TIF_SIGPENDING 2 /* signal pending */ #define TIF_NEED_RESCHED 3 /* rescheduling necessary */ #define TIF_RESTORE_SIGMASK 4 /* restore signal mask in do_signal() */ #define TIF_NOTIFY_SIGNAL 5 /* signal notifications exist */ #define TIF_USEDFPU 8 /* FPU was used by this task * this quantum (SMP) */ #define TIF_POLLING_NRFLAG 9 /* true if poll_idle() is polling * TIF_NEED_RESCHED */ #define TIF_MEMDIE 10 /* is terminating due to OOM killer */ /* as above, but as bit values */ #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_NOTIFY_SIGNAL (1<<TIF_NOTIFY_SIGNAL) #define _TIF_USEDFPU (1<<TIF_USEDFPU) #define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG) #define _TIF_DO_NOTIFY_RESUME_MASK (_TIF_NOTIFY_RESUME | \ _TIF_SIGPENDING | _TIF_NOTIFY_SIGNAL) #define is_32bit_task() (1) #endif /* __KERNEL__ */ #endif /* _ASM_THREAD_INFO_H */