1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */ 2*4882a593Smuzhiyun #ifndef _ALPHA_THREAD_INFO_H 3*4882a593Smuzhiyun #define _ALPHA_THREAD_INFO_H 4*4882a593Smuzhiyun 5*4882a593Smuzhiyun #ifdef __KERNEL__ 6*4882a593Smuzhiyun 7*4882a593Smuzhiyun #ifndef __ASSEMBLY__ 8*4882a593Smuzhiyun #include <asm/processor.h> 9*4882a593Smuzhiyun #include <asm/types.h> 10*4882a593Smuzhiyun #include <asm/hwrpb.h> 11*4882a593Smuzhiyun #include <asm/sysinfo.h> 12*4882a593Smuzhiyun #endif 13*4882a593Smuzhiyun 14*4882a593Smuzhiyun #ifndef __ASSEMBLY__ 15*4882a593Smuzhiyun struct thread_info { 16*4882a593Smuzhiyun struct pcb_struct pcb; /* palcode state */ 17*4882a593Smuzhiyun 18*4882a593Smuzhiyun struct task_struct *task; /* main task structure */ 19*4882a593Smuzhiyun unsigned int flags; /* low level flags */ 20*4882a593Smuzhiyun unsigned int ieee_state; /* see fpu.h */ 21*4882a593Smuzhiyun 22*4882a593Smuzhiyun mm_segment_t addr_limit; /* thread address space */ 23*4882a593Smuzhiyun unsigned cpu; /* current CPU */ 24*4882a593Smuzhiyun int preempt_count; /* 0 => preemptable, <0 => BUG */ 25*4882a593Smuzhiyun unsigned int status; /* thread-synchronous flags */ 26*4882a593Smuzhiyun 27*4882a593Smuzhiyun int bpt_nsaved; 28*4882a593Smuzhiyun unsigned long bpt_addr[2]; /* breakpoint handling */ 29*4882a593Smuzhiyun unsigned int bpt_insn[2]; 30*4882a593Smuzhiyun }; 31*4882a593Smuzhiyun 32*4882a593Smuzhiyun /* 33*4882a593Smuzhiyun * Macros/functions for gaining access to the thread information structure. 34*4882a593Smuzhiyun */ 35*4882a593Smuzhiyun #define INIT_THREAD_INFO(tsk) \ 36*4882a593Smuzhiyun { \ 37*4882a593Smuzhiyun .task = &tsk, \ 38*4882a593Smuzhiyun .addr_limit = KERNEL_DS, \ 39*4882a593Smuzhiyun .preempt_count = INIT_PREEMPT_COUNT, \ 40*4882a593Smuzhiyun } 41*4882a593Smuzhiyun 42*4882a593Smuzhiyun /* How to get the thread information struct from C. */ 43*4882a593Smuzhiyun register struct thread_info *__current_thread_info __asm__("$8"); 44*4882a593Smuzhiyun #define current_thread_info() __current_thread_info 45*4882a593Smuzhiyun 46*4882a593Smuzhiyun #endif /* __ASSEMBLY__ */ 47*4882a593Smuzhiyun 48*4882a593Smuzhiyun /* Thread information allocation. */ 49*4882a593Smuzhiyun #define THREAD_SIZE_ORDER 1 50*4882a593Smuzhiyun #define THREAD_SIZE (2*PAGE_SIZE) 51*4882a593Smuzhiyun 52*4882a593Smuzhiyun /* 53*4882a593Smuzhiyun * Thread information flags: 54*4882a593Smuzhiyun * - these are process state flags and used from assembly 55*4882a593Smuzhiyun * - pending work-to-be-done flags come first and must be assigned to be 56*4882a593Smuzhiyun * within bits 0 to 7 to fit in and immediate operand. 57*4882a593Smuzhiyun * 58*4882a593Smuzhiyun * TIF_SYSCALL_TRACE is known to be 0 via blbs. 59*4882a593Smuzhiyun */ 60*4882a593Smuzhiyun #define TIF_SYSCALL_TRACE 0 /* syscall trace active */ 61*4882a593Smuzhiyun #define TIF_NOTIFY_RESUME 1 /* callback before returning to user */ 62*4882a593Smuzhiyun #define TIF_SIGPENDING 2 /* signal pending */ 63*4882a593Smuzhiyun #define TIF_NEED_RESCHED 3 /* rescheduling necessary */ 64*4882a593Smuzhiyun #define TIF_SYSCALL_AUDIT 4 /* syscall audit active */ 65*4882a593Smuzhiyun #define TIF_NOTIFY_SIGNAL 5 /* signal notifications exist */ 66*4882a593Smuzhiyun #define TIF_DIE_IF_KERNEL 9 /* dik recursion lock */ 67*4882a593Smuzhiyun #define TIF_MEMDIE 13 /* is terminating due to OOM killer */ 68*4882a593Smuzhiyun #define TIF_POLLING_NRFLAG 14 /* idle is polling for TIF_NEED_RESCHED */ 69*4882a593Smuzhiyun 70*4882a593Smuzhiyun #define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE) 71*4882a593Smuzhiyun #define _TIF_SIGPENDING (1<<TIF_SIGPENDING) 72*4882a593Smuzhiyun #define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED) 73*4882a593Smuzhiyun #define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME) 74*4882a593Smuzhiyun #define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT) 75*4882a593Smuzhiyun #define _TIF_NOTIFY_SIGNAL (1<<TIF_NOTIFY_SIGNAL) 76*4882a593Smuzhiyun #define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG) 77*4882a593Smuzhiyun 78*4882a593Smuzhiyun /* Work to do on interrupt/exception return. */ 79*4882a593Smuzhiyun #define _TIF_WORK_MASK (_TIF_SIGPENDING | _TIF_NEED_RESCHED | \ 80*4882a593Smuzhiyun _TIF_NOTIFY_RESUME | _TIF_NOTIFY_SIGNAL) 81*4882a593Smuzhiyun 82*4882a593Smuzhiyun /* Work to do on any return to userspace. */ 83*4882a593Smuzhiyun #define _TIF_ALLWORK_MASK (_TIF_WORK_MASK \ 84*4882a593Smuzhiyun | _TIF_SYSCALL_TRACE) 85*4882a593Smuzhiyun 86*4882a593Smuzhiyun #define TS_UAC_NOPRINT 0x0001 /* ! Preserve the following three */ 87*4882a593Smuzhiyun #define TS_UAC_NOFIX 0x0002 /* ! flags as they match */ 88*4882a593Smuzhiyun #define TS_UAC_SIGBUS 0x0004 /* ! userspace part of 'osf_sysinfo' */ 89*4882a593Smuzhiyun 90*4882a593Smuzhiyun #define SET_UNALIGN_CTL(task,value) ({ \ 91*4882a593Smuzhiyun __u32 status = task_thread_info(task)->status & ~UAC_BITMASK; \ 92*4882a593Smuzhiyun if (value & PR_UNALIGN_NOPRINT) \ 93*4882a593Smuzhiyun status |= TS_UAC_NOPRINT; \ 94*4882a593Smuzhiyun if (value & PR_UNALIGN_SIGBUS) \ 95*4882a593Smuzhiyun status |= TS_UAC_SIGBUS; \ 96*4882a593Smuzhiyun if (value & 4) /* alpha-specific */ \ 97*4882a593Smuzhiyun status |= TS_UAC_NOFIX; \ 98*4882a593Smuzhiyun task_thread_info(task)->status = status; \ 99*4882a593Smuzhiyun 0; }) 100*4882a593Smuzhiyun 101*4882a593Smuzhiyun #define GET_UNALIGN_CTL(task,value) ({ \ 102*4882a593Smuzhiyun __u32 status = task_thread_info(task)->status & ~UAC_BITMASK; \ 103*4882a593Smuzhiyun __u32 res = 0; \ 104*4882a593Smuzhiyun if (status & TS_UAC_NOPRINT) \ 105*4882a593Smuzhiyun res |= PR_UNALIGN_NOPRINT; \ 106*4882a593Smuzhiyun if (status & TS_UAC_SIGBUS) \ 107*4882a593Smuzhiyun res |= PR_UNALIGN_SIGBUS; \ 108*4882a593Smuzhiyun if (status & TS_UAC_NOFIX) \ 109*4882a593Smuzhiyun res |= 4; \ 110*4882a593Smuzhiyun put_user(res, (int __user *)(value)); \ 111*4882a593Smuzhiyun }) 112*4882a593Smuzhiyun 113*4882a593Smuzhiyun #endif /* __KERNEL__ */ 114*4882a593Smuzhiyun #endif /* _ALPHA_THREAD_INFO_H */ 115