1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2003 Alan L. Cox <[email protected]> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * $FreeBSD$ 29 */ 30 31 #ifndef _MACHINE_SF_BUF_H_ 32 #define _MACHINE_SF_BUF_H_ 33 34 #ifdef __mips_n64 /* In 64 bit the whole memory is directly mapped */ 35 36 static inline vm_offset_t 37 sf_buf_kva(struct sf_buf *sf) 38 { 39 vm_page_t m; 40 41 m = (vm_page_t)sf; 42 return (MIPS_PHYS_TO_DIRECT(VM_PAGE_TO_PHYS(m))); 43 } 44 45 static inline struct vm_page * 46 sf_buf_page(struct sf_buf *sf) 47 { 48 49 return ((vm_page_t)sf); 50 } 51 52 #else /* !__mips_n64 */ 53 54 static inline void 55 sf_buf_map(struct sf_buf *sf, int flags) 56 { 57 58 pmap_qenter(sf->kva, &sf->m, 1); 59 } 60 61 static inline int 62 sf_buf_unmap(struct sf_buf *sf) 63 { 64 65 pmap_qremove(sf->kva, 1); 66 return (1); 67 } 68 69 #endif /* __mips_n64 */ 70 71 #endif /* !_MACHINE_SF_BUF_H_ */ 72