| /* thread_info.h: sparc64 low-level thread information |
| * |
| * Copyright (C) 2002 David S. Miller (davem@redhat.com) |
| */ |
| |
| #ifndef _ASM_THREAD_INFO_H |
| #define _ASM_THREAD_INFO_H |
| |
| #ifdef __KERNEL__ |
| |
| #define NSWINS 7 |
| |
| #define TI_FLAG_BYTE_FAULT_CODE 0 |
| #define TI_FLAG_FAULT_CODE_SHIFT 56 |
| #define TI_FLAG_BYTE_WSTATE 1 |
| #define TI_FLAG_WSTATE_SHIFT 48 |
| #define TI_FLAG_BYTE_NOERROR 2 |
| #define TI_FLAG_BYTE_NOERROR_SHIFT 40 |
| #define TI_FLAG_BYTE_FPDEPTH 3 |
| #define TI_FLAG_FPDEPTH_SHIFT 32 |
| #define TI_FLAG_BYTE_CWP 4 |
| #define TI_FLAG_CWP_SHIFT 24 |
| #define TI_FLAG_BYTE_WSAVED 5 |
| #define TI_FLAG_WSAVED_SHIFT 16 |
| |
| #include <asm/page.h> |
| |
| #ifndef __ASSEMBLY__ |
| |
| #include <asm/ptrace.h> |
| #include <asm/types.h> |
| |
| struct task_struct; |
| struct exec_domain; |
| |
| struct thread_info { |
| /* D$ line 1 */ |
| struct task_struct *task; |
| unsigned long flags; |
| __u8 fpsaved[7]; |
| __u8 status; |
| unsigned long ksp; |
| |
| /* D$ line 2 */ |
| unsigned long fault_address; |
| struct pt_regs *kregs; |
| struct exec_domain *exec_domain; |
| int preempt_count; /* 0 => preemptable, <0 => BUG */ |
| __u8 new_child; |
| __u8 current_ds; |
| __u16 cpu; |
| |
| unsigned long *utraps; |
| |
| struct reg_window reg_window[NSWINS]; |
| unsigned long rwbuf_stkptrs[NSWINS]; |
| |
| unsigned long gsr[7]; |
| unsigned long xfsr[7]; |
| |
| struct restart_block restart_block; |
| |
| struct pt_regs *kern_una_regs; |
| unsigned int kern_una_insn; |
| |
| unsigned long fpregs[0] __attribute__ ((aligned(64))); |
| }; |
| |
| #endif /* !(__ASSEMBLY__) */ |
| |
| /* offsets into the thread_info struct for assembly code access */ |
| #define TI_TASK 0x00000000 |
| #define TI_FLAGS 0x00000008 |
| #define TI_FAULT_CODE (TI_FLAGS + TI_FLAG_BYTE_FAULT_CODE) |
| #define TI_WSTATE (TI_FLAGS + TI_FLAG_BYTE_WSTATE) |
| #define TI_CWP (TI_FLAGS + TI_FLAG_BYTE_CWP) |
| #define TI_FPDEPTH (TI_FLAGS + TI_FLAG_BYTE_FPDEPTH) |
| #define TI_WSAVED (TI_FLAGS + TI_FLAG_BYTE_WSAVED) |
| #define TI_SYS_NOERROR (TI_FLAGS + TI_FLAG_BYTE_NOERROR) |
| #define TI_FPSAVED 0x00000010 |
| #define TI_KSP 0x00000018 |
| #define TI_FAULT_ADDR 0x00000020 |
| #define TI_KREGS 0x00000028 |
| #define TI_EXEC_DOMAIN 0x00000030 |
| #define TI_PRE_COUNT 0x00000038 |
| #define TI_NEW_CHILD 0x0000003c |
| #define TI_CURRENT_DS 0x0000003d |
| #define TI_CPU 0x0000003e |
| #define TI_UTRAPS 0x00000040 |
| #define TI_REG_WINDOW 0x00000048 |
| #define TI_RWIN_SPTRS 0x000003c8 |
| #define TI_GSR 0x00000400 |
| #define TI_XFSR 0x00000438 |
| #define TI_RESTART_BLOCK 0x00000470 |
| #define TI_KUNA_REGS 0x000004a0 |
| #define TI_KUNA_INSN 0x000004a8 |
| #define TI_FPREGS 0x000004c0 |
| |
| /* We embed this in the uppermost byte of thread_info->flags */ |
| #define FAULT_CODE_WRITE 0x01 /* Write access, implies D-TLB */ |
| #define FAULT_CODE_DTLB 0x02 /* Miss happened in D-TLB */ |
| #define FAULT_CODE_ITLB 0x04 /* Miss happened in I-TLB */ |
| #define FAULT_CODE_WINFIXUP 0x08 /* Miss happened during spill/fill */ |
| #define FAULT_CODE_BLKCOMMIT 0x10 /* Use blk-commit ASI in copy_page */ |
| |
| #if PAGE_SHIFT == 13 |
| #define THREAD_SIZE (2*PAGE_SIZE) |
| #define THREAD_SHIFT (PAGE_SHIFT + 1) |
| #else /* PAGE_SHIFT == 13 */ |
| #define THREAD_SIZE PAGE_SIZE |
| #define THREAD_SHIFT PAGE_SHIFT |
| #endif /* PAGE_SHIFT == 13 */ |
| |
| #define PREEMPT_ACTIVE 0x10000000 |
| |
| /* |
| * macros/functions for gaining access to the thread information structure |
| */ |
| #ifndef __ASSEMBLY__ |
| |
| #define INIT_THREAD_INFO(tsk) \ |
| { \ |
| .task = &tsk, \ |
| .current_ds = ASI_P, \ |
| .exec_domain = &default_exec_domain, \ |
| .preempt_count = INIT_PREEMPT_COUNT, \ |
| .restart_block = { \ |
| .fn = do_no_restart_syscall, \ |
| }, \ |
| } |
| |
| #define init_thread_info (init_thread_union.thread_info) |
| #define init_stack (init_thread_union.stack) |
| |
| /* 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 */ |
| #if PAGE_SHIFT == 13 |
| #define THREAD_SIZE_ORDER 1 |
| #else /* PAGE_SHIFT == 13 */ |
| #define THREAD_SIZE_ORDER 0 |
| #endif /* PAGE_SHIFT == 13 */ |
| |
| #define __thread_flag_byte_ptr(ti) \ |
| ((unsigned char *)(&((ti)->flags))) |
| #define __cur_thread_flag_byte_ptr __thread_flag_byte_ptr(current_thread_info()) |
| |
| #define get_thread_fault_code() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_FAULT_CODE]) |
| #define set_thread_fault_code(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_FAULT_CODE] = (val)) |
| #define get_thread_wstate() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_WSTATE]) |
| #define set_thread_wstate(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_WSTATE] = (val)) |
| #define get_thread_cwp() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_CWP]) |
| #define set_thread_cwp(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_CWP] = (val)) |
| #define get_thread_noerror() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_NOERROR]) |
| #define set_thread_noerror(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_NOERROR] = (val)) |
| #define get_thread_fpdepth() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_FPDEPTH]) |
| #define set_thread_fpdepth(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_FPDEPTH] = (val)) |
| #define get_thread_wsaved() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_WSAVED]) |
| #define set_thread_wsaved(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_WSAVED] = (val)) |
| #endif /* !(__ASSEMBLY__) */ |
| |
| /* |
| * Thread information flags, only 16 bits are available as we encode |
| * other values into the upper 6 bytes. |
| * |
| * On trap return we need to test several values: |
| * |
| * user: need_resched, notify_resume, sigpending, wsaved |
| * kernel: fpdepth |
| * |
| * So to check for work in the kernel case we simply load the fpdepth |
| * byte out of the flags and test it. For the user case we encode the |
| * lower 3 bytes of flags as follows: |
| * ---------------------------------------- |
| * | wsaved | flags byte 1 | flags byte 2 | |
| * ---------------------------------------- |
| * This optimizes the user test into: |
| * ldx [%g6 + TI_FLAGS], REG1 |
| * sethi %hi(_TIF_USER_WORK_MASK), REG2 |
| * or REG2, %lo(_TIF_USER_WORK_MASK), REG2 |
| * andcc REG1, REG2, %g0 |
| * be,pt no_work_to_do |
| * nop |
| */ |
| #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 */ |
| /* flag bit 4 is available */ |
| #define TIF_UNALIGNED 5 /* allowed to do unaligned accesses */ |
| /* flag bit 6 is available */ |
| #define TIF_32BIT 7 /* 32-bit binary */ |
| /* flag bit 8 is available */ |
| #define TIF_SECCOMP 9 /* secure computing */ |
| #define TIF_SYSCALL_AUDIT 10 /* syscall auditing active */ |
| #define TIF_SYSCALL_TRACEPOINT 11 /* syscall tracepoint instrumentation */ |
| /* NOTE: Thread flags >= 12 should be ones we have no interest |
| * in using in assembly, else we can't use the mask as |
| * an immediate value in instructions such as andcc. |
| */ |
| /* flag bit 12 is available */ |
| #define TIF_MEMDIE 13 /* is terminating due to OOM killer */ |
| #define TIF_POLLING_NRFLAG 14 |
| |
| #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_UNALIGNED (1<<TIF_UNALIGNED) |
| #define _TIF_32BIT (1<<TIF_32BIT) |
| #define _TIF_SECCOMP (1<<TIF_SECCOMP) |
| #define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT) |
| #define _TIF_SYSCALL_TRACEPOINT (1<<TIF_SYSCALL_TRACEPOINT) |
| #define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG) |
| |
| #define _TIF_USER_WORK_MASK ((0xff << TI_FLAG_WSAVED_SHIFT) | \ |
| _TIF_DO_NOTIFY_RESUME_MASK | \ |
| _TIF_NEED_RESCHED) |
| #define _TIF_DO_NOTIFY_RESUME_MASK (_TIF_NOTIFY_RESUME | _TIF_SIGPENDING) |
| |
| /* |
| * Thread-synchronous status. |
| * |
| * This is different from the flags in that nobody else |
| * ever touches our thread-synchronous status, so we don't |
| * have to worry about atomic accesses. |
| * |
| * Note that there are only 8 bits available. |
| */ |
| #define TS_RESTORE_SIGMASK 0x0001 /* restore signal mask in do_signal() */ |
| |
| #ifndef __ASSEMBLY__ |
| #define HAVE_SET_RESTORE_SIGMASK 1 |
| static inline void set_restore_sigmask(void) |
| { |
| struct thread_info *ti = current_thread_info(); |
| ti->status |= TS_RESTORE_SIGMASK; |
| WARN_ON(!test_bit(TIF_SIGPENDING, &ti->flags)); |
| } |
| static inline void clear_restore_sigmask(void) |
| { |
| current_thread_info()->status &= ~TS_RESTORE_SIGMASK; |
| } |
| static inline bool test_restore_sigmask(void) |
| { |
| return current_thread_info()->status & TS_RESTORE_SIGMASK; |
| } |
| static inline bool test_and_clear_restore_sigmask(void) |
| { |
| struct thread_info *ti = current_thread_info(); |
| if (!(ti->status & TS_RESTORE_SIGMASK)) |
| return false; |
| ti->status &= ~TS_RESTORE_SIGMASK; |
| return true; |
| } |
| |
| #define thread32_stack_is_64bit(__SP) (((__SP) & 0x1) != 0) |
| #define test_thread_64bit_stack(__SP) \ |
| ((test_thread_flag(TIF_32BIT) && !thread32_stack_is_64bit(__SP)) ? \ |
| false : true) |
| |
| #endif /* !__ASSEMBLY__ */ |
| |
| #endif /* __KERNEL__ */ |
| |
| #endif /* _ASM_THREAD_INFO_H */ |