1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2020, Scott Phillips <scottph@freebsd.org> 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice unmodified, this list of conditions, and the following 11 * 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 ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 * 27 * $FreeBSD$ 28 */ 29 30 #ifndef _SYS_DUMPSET_H_ 31 #define _SYS_DUMPSET_H_ 32 33 #include <sys/_bitset.h> 34 #include <sys/bitset.h> 35 36 extern struct bitset *vm_page_dump; 37 extern long vm_page_dump_pages; 38 extern vm_paddr_t dump_avail[PHYS_AVAIL_COUNT]; 39 40 static inline void 41 dump_add_page(vm_paddr_t pa) 42 { 43 vm_pindex_t adj; 44 int i; 45 46 adj = 0; 47 for (i = 0; dump_avail[i + 1] != 0; i += 2) { 48 if (pa >= dump_avail[i] && pa < dump_avail[i + 1]) { 49 BIT_SET_ATOMIC(vm_page_dump_pages, 50 (pa >> PAGE_SHIFT) - (dump_avail[i] >> PAGE_SHIFT) + 51 adj, vm_page_dump); 52 return; 53 } 54 adj += howmany(dump_avail[i + 1], PAGE_SIZE) - 55 dump_avail[i] / PAGE_SIZE; 56 } 57 } 58 59 static inline void 60 dump_drop_page(vm_paddr_t pa) 61 { 62 vm_pindex_t adj; 63 int i; 64 65 adj = 0; 66 for (i = 0; dump_avail[i + 1] != 0; i += 2) { 67 if (pa >= dump_avail[i] && pa < dump_avail[i + 1]) { 68 BIT_CLR_ATOMIC(vm_page_dump_pages, 69 (pa >> PAGE_SHIFT) - (dump_avail[i] >> PAGE_SHIFT) + 70 adj, vm_page_dump); 71 return; 72 } 73 adj += howmany(dump_avail[i + 1], PAGE_SIZE) - 74 dump_avail[i] / PAGE_SIZE; 75 } 76 } 77 78 static inline vm_paddr_t 79 vm_page_dump_index_to_pa(int bit) 80 { 81 int i, tot; 82 83 for (i = 0; dump_avail[i + 1] != 0; i += 2) { 84 tot = howmany(dump_avail[i + 1], PAGE_SIZE) - 85 dump_avail[i] / PAGE_SIZE; 86 if (bit < tot) 87 return ((vm_paddr_t)bit * PAGE_SIZE + 88 (dump_avail[i] & ~PAGE_MASK)); 89 bit -= tot; 90 } 91 return ((vm_paddr_t)NULL); 92 } 93 94 #define VM_PAGE_DUMP_FOREACH(pa) \ 95 for (vm_pindex_t __b = BIT_FFS(vm_page_dump_pages, vm_page_dump); \ 96 (pa) = vm_page_dump_index_to_pa(__b - 1), __b != 0; \ 97 __b = BIT_FFS_AT(vm_page_dump_pages, vm_page_dump, __b)) 98 99 #endif /* _SYS_DUMPSET_H_ */ 100