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244 lines
8.0 KiB
244 lines
8.0 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* thread_info.h: sparc64 low-level thread information |
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* |
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* Copyright (C) 2002 David S. Miller ([email protected]) |
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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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#define NSWINS 7 |
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#define TI_FLAG_BYTE_FAULT_CODE 0 |
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#define TI_FLAG_FAULT_CODE_SHIFT 56 |
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#define TI_FLAG_BYTE_WSTATE 1 |
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#define TI_FLAG_WSTATE_SHIFT 48 |
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#define TI_FLAG_BYTE_NOERROR 2 |
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#define TI_FLAG_BYTE_NOERROR_SHIFT 40 |
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#define TI_FLAG_BYTE_FPDEPTH 3 |
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#define TI_FLAG_FPDEPTH_SHIFT 32 |
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#define TI_FLAG_BYTE_CWP 4 |
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#define TI_FLAG_CWP_SHIFT 24 |
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#define TI_FLAG_BYTE_WSAVED 5 |
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#define TI_FLAG_WSAVED_SHIFT 16 |
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#include <asm/page.h> |
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#ifndef __ASSEMBLY__ |
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#include <asm/ptrace.h> |
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#include <asm/types.h> |
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struct task_struct; |
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struct thread_info { |
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/* D$ line 1 */ |
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struct task_struct *task; |
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unsigned long flags; |
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__u8 fpsaved[7]; |
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__u8 status; |
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unsigned long ksp; |
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/* D$ line 2 */ |
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unsigned long fault_address; |
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struct pt_regs *kregs; |
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int preempt_count; /* 0 => preemptable, <0 => BUG */ |
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__u8 new_child; |
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__u8 current_ds; |
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__u16 cpu; |
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unsigned long *utraps; |
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struct reg_window reg_window[NSWINS]; |
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unsigned long rwbuf_stkptrs[NSWINS]; |
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unsigned long gsr[7]; |
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unsigned long xfsr[7]; |
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struct pt_regs *kern_una_regs; |
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unsigned int kern_una_insn; |
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unsigned long fpregs[(7 * 256) / sizeof(unsigned long)] |
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__attribute__ ((aligned(64))); |
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}; |
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#endif /* !(__ASSEMBLY__) */ |
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/* offsets into the thread_info struct for assembly code access */ |
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#define TI_TASK 0x00000000 |
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#define TI_FLAGS 0x00000008 |
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#define TI_FAULT_CODE (TI_FLAGS + TI_FLAG_BYTE_FAULT_CODE) |
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#define TI_WSTATE (TI_FLAGS + TI_FLAG_BYTE_WSTATE) |
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#define TI_CWP (TI_FLAGS + TI_FLAG_BYTE_CWP) |
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#define TI_FPDEPTH (TI_FLAGS + TI_FLAG_BYTE_FPDEPTH) |
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#define TI_WSAVED (TI_FLAGS + TI_FLAG_BYTE_WSAVED) |
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#define TI_SYS_NOERROR (TI_FLAGS + TI_FLAG_BYTE_NOERROR) |
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#define TI_FPSAVED 0x00000010 |
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#define TI_KSP 0x00000018 |
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#define TI_FAULT_ADDR 0x00000020 |
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#define TI_KREGS 0x00000028 |
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#define TI_PRE_COUNT 0x00000030 |
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#define TI_NEW_CHILD 0x00000034 |
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#define TI_CURRENT_DS 0x00000035 |
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#define TI_CPU 0x00000036 |
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#define TI_UTRAPS 0x00000038 |
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#define TI_REG_WINDOW 0x00000040 |
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#define TI_RWIN_SPTRS 0x000003c0 |
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#define TI_GSR 0x000003f8 |
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#define TI_XFSR 0x00000430 |
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#define TI_KUNA_REGS 0x00000468 |
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#define TI_KUNA_INSN 0x00000470 |
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#define TI_FPREGS 0x00000480 |
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/* We embed this in the uppermost byte of thread_info->flags */ |
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#define FAULT_CODE_WRITE 0x01 /* Write access, implies D-TLB */ |
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#define FAULT_CODE_DTLB 0x02 /* Miss happened in D-TLB */ |
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#define FAULT_CODE_ITLB 0x04 /* Miss happened in I-TLB */ |
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#define FAULT_CODE_WINFIXUP 0x08 /* Miss happened during spill/fill */ |
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#define FAULT_CODE_BLKCOMMIT 0x10 /* Use blk-commit ASI in copy_page */ |
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#define FAULT_CODE_BAD_RA 0x20 /* Bad RA for sun4v */ |
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#if PAGE_SHIFT == 13 |
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#define THREAD_SIZE (2*PAGE_SIZE) |
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#define THREAD_SHIFT (PAGE_SHIFT + 1) |
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#else /* PAGE_SHIFT == 13 */ |
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#define THREAD_SIZE PAGE_SIZE |
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#define THREAD_SHIFT PAGE_SHIFT |
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#endif /* PAGE_SHIFT == 13 */ |
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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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#ifndef __ASSEMBLY__ |
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#define INIT_THREAD_INFO(tsk) \ |
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{ \ |
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.task = &tsk, \ |
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.current_ds = ASI_P, \ |
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.preempt_count = INIT_PREEMPT_COUNT, \ |
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.kregs = (struct pt_regs *)(init_stack+THREAD_SIZE)-1 \ |
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} |
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/* how to get the thread information struct from C */ |
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#ifndef BUILD_VDSO |
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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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#else |
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extern struct thread_info *current_thread_info(void); |
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#endif |
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/* thread information allocation */ |
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#if PAGE_SHIFT == 13 |
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#define THREAD_SIZE_ORDER 1 |
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#else /* PAGE_SHIFT == 13 */ |
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#define THREAD_SIZE_ORDER 0 |
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#endif /* PAGE_SHIFT == 13 */ |
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#define __thread_flag_byte_ptr(ti) \ |
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((unsigned char *)(&((ti)->flags))) |
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#define __cur_thread_flag_byte_ptr __thread_flag_byte_ptr(current_thread_info()) |
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#define get_thread_fault_code() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_FAULT_CODE]) |
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#define set_thread_fault_code(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_FAULT_CODE] = (val)) |
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#define get_thread_wstate() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_WSTATE]) |
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#define set_thread_wstate(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_WSTATE] = (val)) |
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#define get_thread_cwp() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_CWP]) |
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#define set_thread_cwp(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_CWP] = (val)) |
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#define get_thread_noerror() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_NOERROR]) |
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#define set_thread_noerror(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_NOERROR] = (val)) |
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#define get_thread_fpdepth() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_FPDEPTH]) |
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#define set_thread_fpdepth(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_FPDEPTH] = (val)) |
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#define get_thread_wsaved() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_WSAVED]) |
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#define set_thread_wsaved(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_WSAVED] = (val)) |
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#endif /* !(__ASSEMBLY__) */ |
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/* |
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* Thread information flags, only 16 bits are available as we encode |
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* other values into the upper 6 bytes. |
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* |
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* On trap return we need to test several values: |
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* |
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* user: need_resched, notify_resume, sigpending, wsaved |
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* kernel: fpdepth |
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* |
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* So to check for work in the kernel case we simply load the fpdepth |
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* byte out of the flags and test it. For the user case we encode the |
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* lower 3 bytes of flags as follows: |
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* ---------------------------------------- |
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* | wsaved | flags byte 1 | flags byte 2 | |
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* ---------------------------------------- |
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* This optimizes the user test into: |
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* ldx [%g6 + TI_FLAGS], REG1 |
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* sethi %hi(_TIF_USER_WORK_MASK), REG2 |
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* or REG2, %lo(_TIF_USER_WORK_MASK), REG2 |
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* andcc REG1, REG2, %g0 |
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* be,pt no_work_to_do |
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* nop |
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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_NOTIFY_SIGNAL 4 /* signal notifications exist */ |
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#define TIF_UNALIGNED 5 /* allowed to do unaligned accesses */ |
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#define TIF_UPROBE 6 /* breakpointed or singlestepped */ |
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#define TIF_32BIT 7 /* 32-bit binary */ |
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#define TIF_NOHZ 8 /* in adaptive nohz mode */ |
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#define TIF_SECCOMP 9 /* secure computing */ |
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#define TIF_SYSCALL_AUDIT 10 /* syscall auditing active */ |
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#define TIF_SYSCALL_TRACEPOINT 11 /* syscall tracepoint instrumentation */ |
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/* NOTE: Thread flags >= 12 should be ones we have no interest |
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* in using in assembly, else we can't use the mask as |
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* an immediate value in instructions such as andcc. |
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*/ |
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#define TIF_MCDPER 12 /* Precise MCD exception */ |
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#define TIF_MEMDIE 13 /* is terminating due to OOM killer */ |
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#define TIF_POLLING_NRFLAG 14 |
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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_UNALIGNED (1<<TIF_UNALIGNED) |
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#define _TIF_UPROBE (1<<TIF_UPROBE) |
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#define _TIF_32BIT (1<<TIF_32BIT) |
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#define _TIF_NOHZ (1<<TIF_NOHZ) |
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#define _TIF_SECCOMP (1<<TIF_SECCOMP) |
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#define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT) |
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#define _TIF_SYSCALL_TRACEPOINT (1<<TIF_SYSCALL_TRACEPOINT) |
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#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG) |
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#define _TIF_USER_WORK_MASK ((0xff << TI_FLAG_WSAVED_SHIFT) | \ |
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_TIF_DO_NOTIFY_RESUME_MASK | \ |
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_TIF_NEED_RESCHED) |
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#define _TIF_DO_NOTIFY_RESUME_MASK (_TIF_NOTIFY_RESUME | \ |
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_TIF_SIGPENDING | _TIF_UPROBE | \ |
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_TIF_NOTIFY_SIGNAL) |
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#define is_32bit_task() (test_thread_flag(TIF_32BIT)) |
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/* |
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* Thread-synchronous status. |
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* |
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* This is different from the flags in that nobody else |
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* ever touches our thread-synchronous status, so we don't |
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* have to worry about atomic accesses. |
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* |
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* Note that there are only 8 bits available. |
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*/ |
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#ifndef __ASSEMBLY__ |
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#define thread32_stack_is_64bit(__SP) (((__SP) & 0x1) != 0) |
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#define test_thread_64bit_stack(__SP) \ |
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((test_thread_flag(TIF_32BIT) && !thread32_stack_is_64bit(__SP)) ? \ |
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false : true) |
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#endif /* !__ASSEMBLY__ */ |
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#endif /* __KERNEL__ */ |
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#endif /* _ASM_THREAD_INFO_H */
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