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      1 /*	$NetBSD: proc.h,v 1.6 2024/08/04 08:16:25 skrll Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2014 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Matt Thomas of 3am Software Foundry.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #ifndef _RISCV_PROC_H_
     33 #define _RISCV_PROC_H_
     34 
     35 #include <sys/param.h>
     36 #include <riscv/vmparam.h>
     37 
     38 struct lwp;
     39 
     40 /*
     41  * Machine-dependent part of the lwp structure for RISCV
     42  */
     43 struct trapframe;
     44 
     45 struct mdlwp {
     46 	struct trapframe *md_utf;	/* trapframe from userspace */
     47 	struct trapframe *md_ktf;	/* trapframe from userspace */
     48 	struct faultbuf *md_onfault;	/* registers to store on fault */
     49 	unsigned long md_usp;		/* for locore.S */
     50 	unsigned long md_ss_addr;	/* single step address for ptrace */
     51 	int	md_ss_instr;		/* single step instruction for ptrace */
     52 	volatile int md_astpending;	/* AST pending on return to userland */
     53 #if 0
     54 #if USPACE > PAGE_SIZE
     55 	int	md_upte[USPACE/4096];	/* ptes for mapping u page */
     56 #else
     57 	int	md_dpte[USPACE/4096];	/* dummy ptes to keep the same */
     58 #endif
     59 #endif
     60 };
     61 
     62 struct mdproc {
     63 					/* syscall entry for this process */
     64 	void	(*md_syscall)(struct trapframe *);
     65 };
     66 
     67 #ifdef _KERNEL
     68 #define	LWP0_CPU_INFO	&cpu_info_store[0]	/* staticly set in lwp0 */
     69 #if 0
     70 #define LWP0_MD_INITIALIZER {   \
     71 	.md_utf = (void *)0xdeadbeef, \
     72     }
     73 #endif
     74 #endif /* _KERNEL */
     75 
     76 #endif /* _RISCV_PROC_H_ */
     77