/* 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
*/
/* A place to store user windows and stack pointers * when the stack needs inspection.
*/ struct reg_window32 reg_window[NSWINS]; /* align for ldd! */ unsignedlong rwbuf_stkptrs[NSWINS]; unsignedlong 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 */ registerstruct 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)
/* * 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)
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