1 /* $NetBSD: pmap_devmap.h,v 1.2 2024/11/25 22:03:44 skrll Exp $ */ 2 3 /*- 4 * Copyright (c) 2022 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Nick Hudson 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 33 #ifndef _UVM_PMAP_DEVMAP_H_ 34 #define _UVM_PMAP_DEVMAP_H_ 35 36 #ifdef _KERNEL 37 38 typedef struct pmap_devmap { 39 vaddr_t pd_va; /* virtual address */ 40 paddr_t pd_pa; /* physical address */ 41 psize_t pd_size; /* size of region */ 42 vm_prot_t pd_prot; /* protection code */ 43 u_int pd_flags; /* flags for pmap_kenter_{pa,range} */ 44 } pmap_devmap_t; 45 46 47 bool pmap_devmap_bootstrapped_p(void); 48 void pmap_devmap_register(const struct pmap_devmap *); 49 void pmap_devmap_bootstrap(vaddr_t, const struct pmap_devmap *); 50 vaddr_t pmap_devmap_root(void); 51 const struct pmap_devmap *pmap_devmap_find_pa(paddr_t, psize_t); 52 const struct pmap_devmap *pmap_devmap_find_va(vaddr_t, vsize_t); 53 54 #define DEVMAP_ENTRY_FLAGS(va, pa, sz, fl) \ 55 { \ 56 .pd_va = DEVMAP_ALIGN(va), \ 57 .pd_pa = DEVMAP_ALIGN(pa), \ 58 .pd_size = DEVMAP_SIZE(sz), \ 59 .pd_prot = VM_PROT_READ | VM_PROT_WRITE, \ 60 .pd_flags = (fl), \ 61 } 62 63 #define DEVMAP_ENTRY(va, pa, sz) \ 64 DEVMAP_ENTRY_FLAGS(va, pa, sz, DEVMAP_FLAGS) 65 66 #define DEVMAP_ENTRY_END { 0 } 67 68 #endif /* _KERNEL */ 69 70 #endif /* _UVM_PMAP_DEVMAP_H_ */ 71