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This definition enables callers to estimate remaining space on the kstack, and take action on it. Notably, it enables optimizations in the GEOM and netgraph subsystems to directly dispatch work items when there is sufficient stack space, rather than queuing them for a worker thread. Implement it for riscv, arm, and mips. Remove the #ifdefs, so it will not go unimplemented elsewhere. PR: 259157 Reviewed by: mav, kib, markj (previous version) MFC after: 1 week Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D32580
110 lines
3.7 KiB
C
110 lines
3.7 KiB
C
/* $OpenBSD: proc.h,v 1.2 1998/09/15 10:50:12 pefo Exp $ */
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/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Ralph Campbell.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)proc.h 8.1 (Berkeley) 6/10/93
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* JNPR: proc.h,v 1.7.2.1 2007/09/10 06:25:24 girish
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* $FreeBSD$
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*/
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#ifndef _MACHINE_PROC_H_
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#define _MACHINE_PROC_H_
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#ifdef CPU_CNMIPS
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#include <machine/octeon_cop2.h>
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#endif
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/*
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* Machine-dependent part of the proc structure.
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*/
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struct mdthread {
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int md_flags; /* machine-dependent flags */
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#if defined(__mips_n64) || defined(__mips_n32) /* PHYSADDR_64_BIT */
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uint64_t md_upte[KSTACK_PAGES]; /* ptes for mapping u pcb */
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#else
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int md_upte[KSTACK_PAGES];
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#endif
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uintptr_t md_ss_addr; /* single step address for ptrace */
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int md_ss_instr; /* single step instruction for ptrace */
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register_t md_saved_intr;
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u_int md_spinlock_count;
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/* The following is CPU dependent, but kept in for compatibility */
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int md_pc_ctrl; /* performance counter control */
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int md_pc_count; /* performance counter */
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int md_pc_spill; /* performance counter spill */
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void *md_tls;
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#ifdef CPU_CNMIPS
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struct octeon_cop2_state *md_cop2; /* kernel context */
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struct octeon_cop2_state *md_ucop2; /* userland context */
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#define COP2_OWNER_USERLAND 0x0000 /* Userland owns COP2 */
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#define COP2_OWNER_KERNEL 0x0001 /* Kernel owns COP2 */
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int md_cop2owner;
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#endif
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};
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/* md_flags */
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#define MDTD_FPUSED 0x0001 /* Process used the FPU */
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#define MDTD_COP2USED 0x0002 /* Process used the COP2 */
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struct mdproc {
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size_t md_tls_tcb_offset; /* TCB offset */
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};
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#define MAXARGS 8
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struct syscall_args {
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u_int code;
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u_int original_code;
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struct sysent *callp;
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register_t args[MAXARGS];
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};
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#ifdef __mips_n64
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#define KINFO_PROC_SIZE 1088
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#define KINFO_PROC32_SIZE 816
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#else
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#define KINFO_PROC_SIZE 816
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#endif
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#ifdef _KERNEL
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#include <machine/pcb.h>
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/* Get the current kernel thread stack usage. */
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#define GET_STACK_USAGE(total, used) do { \
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struct thread *td = curthread; \
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(total) = td->td_kstack_pages * PAGE_SIZE - sizeof(struct pcb); \
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(used) = td->td_kstack + (total) - (vm_offset_t)&td; \
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} while (0)
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#endif /* _KERNEL */
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#endif /* !_MACHINE_PROC_H_ */
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