1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */ 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * thread_info.h: sparc low-level thread information 4*4882a593Smuzhiyun * adapted from the ppc version by Pete Zaitcev, which was 5*4882a593Smuzhiyun * adapted from the i386 version by Paul Mackerras 6*4882a593Smuzhiyun * 7*4882a593Smuzhiyun * Copyright (C) 2002 David Howells (dhowells@redhat.com) 8*4882a593Smuzhiyun * Copyright (c) 2002 Pete Zaitcev (zaitcev@yahoo.com) 9*4882a593Smuzhiyun * - Incorporating suggestions made by Linus Torvalds and Dave Miller 10*4882a593Smuzhiyun */ 11*4882a593Smuzhiyun 12*4882a593Smuzhiyun #ifndef _ASM_THREAD_INFO_H 13*4882a593Smuzhiyun #define _ASM_THREAD_INFO_H 14*4882a593Smuzhiyun 15*4882a593Smuzhiyun #ifdef __KERNEL__ 16*4882a593Smuzhiyun 17*4882a593Smuzhiyun #ifndef __ASSEMBLY__ 18*4882a593Smuzhiyun 19*4882a593Smuzhiyun #include <asm/ptrace.h> 20*4882a593Smuzhiyun #include <asm/page.h> 21*4882a593Smuzhiyun 22*4882a593Smuzhiyun /* 23*4882a593Smuzhiyun * Low level task data. 24*4882a593Smuzhiyun * 25*4882a593Smuzhiyun * If you change this, change the TI_* offsets below to match. 26*4882a593Smuzhiyun */ 27*4882a593Smuzhiyun #define NSWINS 8 28*4882a593Smuzhiyun struct thread_info { 29*4882a593Smuzhiyun unsigned long uwinmask; 30*4882a593Smuzhiyun struct task_struct *task; /* main task structure */ 31*4882a593Smuzhiyun unsigned long flags; /* low level flags */ 32*4882a593Smuzhiyun int cpu; /* cpu we're on */ 33*4882a593Smuzhiyun int preempt_count; /* 0 => preemptable, 34*4882a593Smuzhiyun <0 => BUG */ 35*4882a593Smuzhiyun int softirq_count; 36*4882a593Smuzhiyun int hardirq_count; 37*4882a593Smuzhiyun 38*4882a593Smuzhiyun u32 __unused; 39*4882a593Smuzhiyun 40*4882a593Smuzhiyun /* Context switch saved kernel state. */ 41*4882a593Smuzhiyun unsigned long ksp; /* ... ksp __attribute__ ((aligned (8))); */ 42*4882a593Smuzhiyun unsigned long kpc; 43*4882a593Smuzhiyun unsigned long kpsr; 44*4882a593Smuzhiyun unsigned long kwim; 45*4882a593Smuzhiyun 46*4882a593Smuzhiyun /* A place to store user windows and stack pointers 47*4882a593Smuzhiyun * when the stack needs inspection. 48*4882a593Smuzhiyun */ 49*4882a593Smuzhiyun struct reg_window32 reg_window[NSWINS]; /* align for ldd! */ 50*4882a593Smuzhiyun unsigned long rwbuf_stkptrs[NSWINS]; 51*4882a593Smuzhiyun unsigned long w_saved; 52*4882a593Smuzhiyun }; 53*4882a593Smuzhiyun 54*4882a593Smuzhiyun /* 55*4882a593Smuzhiyun * macros/functions for gaining access to the thread information structure 56*4882a593Smuzhiyun */ 57*4882a593Smuzhiyun #define INIT_THREAD_INFO(tsk) \ 58*4882a593Smuzhiyun { \ 59*4882a593Smuzhiyun .uwinmask = 0, \ 60*4882a593Smuzhiyun .task = &tsk, \ 61*4882a593Smuzhiyun .flags = 0, \ 62*4882a593Smuzhiyun .cpu = 0, \ 63*4882a593Smuzhiyun .preempt_count = INIT_PREEMPT_COUNT, \ 64*4882a593Smuzhiyun } 65*4882a593Smuzhiyun 66*4882a593Smuzhiyun /* how to get the thread information struct from C */ 67*4882a593Smuzhiyun register struct thread_info *current_thread_info_reg asm("g6"); 68*4882a593Smuzhiyun #define current_thread_info() (current_thread_info_reg) 69*4882a593Smuzhiyun 70*4882a593Smuzhiyun /* 71*4882a593Smuzhiyun * thread information allocation 72*4882a593Smuzhiyun */ 73*4882a593Smuzhiyun #define THREAD_SIZE_ORDER 1 74*4882a593Smuzhiyun 75*4882a593Smuzhiyun #endif /* __ASSEMBLY__ */ 76*4882a593Smuzhiyun 77*4882a593Smuzhiyun /* Size of kernel stack for each process */ 78*4882a593Smuzhiyun #define THREAD_SIZE (2 * PAGE_SIZE) 79*4882a593Smuzhiyun 80*4882a593Smuzhiyun /* 81*4882a593Smuzhiyun * Offsets in thread_info structure, used in assembly code 82*4882a593Smuzhiyun * The "#define REGWIN_SZ 0x40" was abolished, so no multiplications. 83*4882a593Smuzhiyun */ 84*4882a593Smuzhiyun #define TI_UWINMASK 0x00 /* uwinmask */ 85*4882a593Smuzhiyun #define TI_TASK 0x04 86*4882a593Smuzhiyun #define TI_FLAGS 0x08 87*4882a593Smuzhiyun #define TI_CPU 0x0c 88*4882a593Smuzhiyun #define TI_PREEMPT 0x10 /* preempt_count */ 89*4882a593Smuzhiyun #define TI_SOFTIRQ 0x14 /* softirq_count */ 90*4882a593Smuzhiyun #define TI_HARDIRQ 0x18 /* hardirq_count */ 91*4882a593Smuzhiyun #define TI_KSP 0x20 /* ksp */ 92*4882a593Smuzhiyun #define TI_KPC 0x24 /* kpc (ldd'ed with kpc) */ 93*4882a593Smuzhiyun #define TI_KPSR 0x28 /* kpsr */ 94*4882a593Smuzhiyun #define TI_KWIM 0x2c /* kwim (ldd'ed with kpsr) */ 95*4882a593Smuzhiyun #define TI_REG_WINDOW 0x30 96*4882a593Smuzhiyun #define TI_RWIN_SPTRS 0x230 97*4882a593Smuzhiyun #define TI_W_SAVED 0x250 98*4882a593Smuzhiyun 99*4882a593Smuzhiyun /* 100*4882a593Smuzhiyun * thread information flag bit numbers 101*4882a593Smuzhiyun */ 102*4882a593Smuzhiyun #define TIF_SYSCALL_TRACE 0 /* syscall trace active */ 103*4882a593Smuzhiyun #define TIF_NOTIFY_RESUME 1 /* callback before returning to user */ 104*4882a593Smuzhiyun #define TIF_SIGPENDING 2 /* signal pending */ 105*4882a593Smuzhiyun #define TIF_NEED_RESCHED 3 /* rescheduling necessary */ 106*4882a593Smuzhiyun #define TIF_RESTORE_SIGMASK 4 /* restore signal mask in do_signal() */ 107*4882a593Smuzhiyun #define TIF_NOTIFY_SIGNAL 5 /* signal notifications exist */ 108*4882a593Smuzhiyun #define TIF_USEDFPU 8 /* FPU was used by this task 109*4882a593Smuzhiyun * this quantum (SMP) */ 110*4882a593Smuzhiyun #define TIF_POLLING_NRFLAG 9 /* true if poll_idle() is polling 111*4882a593Smuzhiyun * TIF_NEED_RESCHED */ 112*4882a593Smuzhiyun #define TIF_MEMDIE 10 /* is terminating due to OOM killer */ 113*4882a593Smuzhiyun 114*4882a593Smuzhiyun /* as above, but as bit values */ 115*4882a593Smuzhiyun #define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE) 116*4882a593Smuzhiyun #define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME) 117*4882a593Smuzhiyun #define _TIF_SIGPENDING (1<<TIF_SIGPENDING) 118*4882a593Smuzhiyun #define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED) 119*4882a593Smuzhiyun #define _TIF_NOTIFY_SIGNAL (1<<TIF_NOTIFY_SIGNAL) 120*4882a593Smuzhiyun #define _TIF_USEDFPU (1<<TIF_USEDFPU) 121*4882a593Smuzhiyun #define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG) 122*4882a593Smuzhiyun 123*4882a593Smuzhiyun #define _TIF_DO_NOTIFY_RESUME_MASK (_TIF_NOTIFY_RESUME | \ 124*4882a593Smuzhiyun _TIF_SIGPENDING | _TIF_NOTIFY_SIGNAL) 125*4882a593Smuzhiyun 126*4882a593Smuzhiyun #define is_32bit_task() (1) 127*4882a593Smuzhiyun 128*4882a593Smuzhiyun #endif /* __KERNEL__ */ 129*4882a593Smuzhiyun 130*4882a593Smuzhiyun #endif /* _ASM_THREAD_INFO_H */ 131