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