1*0Sstevel@tonic-gate /* 2*0Sstevel@tonic-gate * CDDL HEADER START 3*0Sstevel@tonic-gate * 4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*0Sstevel@tonic-gate * with the License. 8*0Sstevel@tonic-gate * 9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*0Sstevel@tonic-gate * See the License for the specific language governing permissions 12*0Sstevel@tonic-gate * and limitations under the License. 13*0Sstevel@tonic-gate * 14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*0Sstevel@tonic-gate * 20*0Sstevel@tonic-gate * CDDL HEADER END 21*0Sstevel@tonic-gate */ 22*0Sstevel@tonic-gate /* 23*0Sstevel@tonic-gate * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24*0Sstevel@tonic-gate * Use is subject to license terms. 25*0Sstevel@tonic-gate */ 26*0Sstevel@tonic-gate 27*0Sstevel@tonic-gate #ifndef _SYS_COPYOPS_H 28*0Sstevel@tonic-gate #define _SYS_COPYOPS_H 29*0Sstevel@tonic-gate 30*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 31*0Sstevel@tonic-gate 32*0Sstevel@tonic-gate #include <sys/types.h> 33*0Sstevel@tonic-gate #include <sys/thread.h> 34*0Sstevel@tonic-gate #include <sys/buf.h> 35*0Sstevel@tonic-gate #include <sys/aio_req.h> 36*0Sstevel@tonic-gate #include <sys/uio.h> 37*0Sstevel@tonic-gate 38*0Sstevel@tonic-gate #ifdef __cplusplus 39*0Sstevel@tonic-gate extern "C" { 40*0Sstevel@tonic-gate #endif 41*0Sstevel@tonic-gate 42*0Sstevel@tonic-gate #ifdef _KERNEL 43*0Sstevel@tonic-gate 44*0Sstevel@tonic-gate /* 45*0Sstevel@tonic-gate * Copy in/out vector operations. This structure is used to interpose 46*0Sstevel@tonic-gate * on the kernel copyin/copyout/etc. operations for various purposes 47*0Sstevel@tonic-gate * such as handling watchpoints in the affected user memory. When one of the 48*0Sstevel@tonic-gate * copy operations causes a fault, the corresponding function in this vector is 49*0Sstevel@tonic-gate * called to handle it. 50*0Sstevel@tonic-gate * 51*0Sstevel@tonic-gate * The 64-bit operations in the structure fetch and store extended 52*0Sstevel@tonic-gate * words and are only used on platforms with 64 bit general 53*0Sstevel@tonic-gate * registers e.g. sun4u. 54*0Sstevel@tonic-gate * 55*0Sstevel@tonic-gate * Since the only users of these interfaces (watchpoints and pxfs) perform the 56*0Sstevel@tonic-gate * default action unless there is a page fault, we can save the overhead of 57*0Sstevel@tonic-gate * having to go through this indirection unless there is a page fault. This 58*0Sstevel@tonic-gate * improves performance both in general and when watchpoints are enabled. If, 59*0Sstevel@tonic-gate * in the future, a consumer relies on being able to interpose on all actions, 60*0Sstevel@tonic-gate * then this assumption will have to be undone. 61*0Sstevel@tonic-gate * 62*0Sstevel@tonic-gate * No consumers should call these functions directly. They are automatically 63*0Sstevel@tonic-gate * handled by the generic versions. 64*0Sstevel@tonic-gate */ 65*0Sstevel@tonic-gate typedef struct copyops { 66*0Sstevel@tonic-gate /* 67*0Sstevel@tonic-gate * unstructured byte copyin/out functions 68*0Sstevel@tonic-gate */ 69*0Sstevel@tonic-gate int (*cp_copyin)(const void *, void *, size_t); 70*0Sstevel@tonic-gate int (*cp_xcopyin)(const void *, void *, size_t); 71*0Sstevel@tonic-gate int (*cp_copyout)(const void *, void *, size_t); 72*0Sstevel@tonic-gate int (*cp_xcopyout)(const void *, void *, size_t); 73*0Sstevel@tonic-gate int (*cp_copyinstr)(const char *, char *, size_t, size_t *); 74*0Sstevel@tonic-gate int (*cp_copyoutstr)(const char *, char *, size_t, size_t *); 75*0Sstevel@tonic-gate 76*0Sstevel@tonic-gate /* 77*0Sstevel@tonic-gate * fetch/store byte/halfword/word/extended word 78*0Sstevel@tonic-gate */ 79*0Sstevel@tonic-gate int (*cp_fuword8)(const void *, uint8_t *); 80*0Sstevel@tonic-gate int (*cp_fuword16)(const void *, uint16_t *); 81*0Sstevel@tonic-gate int (*cp_fuword32)(const void *, uint32_t *); 82*0Sstevel@tonic-gate int (*cp_fuword64)(const void *, uint64_t *); 83*0Sstevel@tonic-gate 84*0Sstevel@tonic-gate int (*cp_suword8)(void *, uint8_t); 85*0Sstevel@tonic-gate int (*cp_suword16)(void *, uint16_t); 86*0Sstevel@tonic-gate int (*cp_suword32)(void *, uint32_t); 87*0Sstevel@tonic-gate int (*cp_suword64)(void *, uint64_t); 88*0Sstevel@tonic-gate 89*0Sstevel@tonic-gate int (*cp_physio)(int (*)(struct buf *), struct buf *, dev_t, 90*0Sstevel@tonic-gate int, void (*)(struct buf *), struct uio *); 91*0Sstevel@tonic-gate } copyops_t; 92*0Sstevel@tonic-gate 93*0Sstevel@tonic-gate extern int default_physio(int (*)(struct buf *), struct buf *, 94*0Sstevel@tonic-gate dev_t, int, void (*)(struct buf *), struct uio *); 95*0Sstevel@tonic-gate 96*0Sstevel@tonic-gate /* 97*0Sstevel@tonic-gate * Interfaces for installing and removing copyops. 98*0Sstevel@tonic-gate */ 99*0Sstevel@tonic-gate extern void install_copyops(kthread_id_t tp, copyops_t *cp); 100*0Sstevel@tonic-gate extern void remove_copyops(kthread_id_t tp); 101*0Sstevel@tonic-gate extern int copyops_installed(kthread_id_t tp); 102*0Sstevel@tonic-gate 103*0Sstevel@tonic-gate #endif /* _KERNEL */ 104*0Sstevel@tonic-gate 105*0Sstevel@tonic-gate #ifdef __cplusplus 106*0Sstevel@tonic-gate } 107*0Sstevel@tonic-gate #endif 108*0Sstevel@tonic-gate 109*0Sstevel@tonic-gate #endif /* _SYS_COPYOPS_H */ 110