1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2006 Peter Wemm 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 * 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include "opt_watchdog.h" 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/conf.h> 37 #include <sys/cons.h> 38 #include <sys/kernel.h> 39 #include <sys/kerneldump.h> 40 #include <sys/msgbuf.h> 41 #include <sys/watchdog.h> 42 #include <vm/vm.h> 43 #include <vm/pmap.h> 44 #include <machine/atomic.h> 45 #include <machine/elf.h> 46 #include <machine/md_var.h> 47 #include <machine/vmparam.h> 48 #include <machine/minidump.h> 49 50 CTASSERT(sizeof(struct kerneldumpheader) == 512); 51 52 uint32_t *vm_page_dump; 53 int vm_page_dump_size; 54 55 CTASSERT(sizeof(*vm_page_dump) == 4); 56 57 void 58 dump_add_page(vm_paddr_t pa) 59 { 60 int idx, bit; 61 62 pa >>= PAGE_SHIFT; 63 idx = pa >> 5; /* 2^5 = 32 */ 64 bit = pa & 31; 65 atomic_set_int(&vm_page_dump[idx], 1ul << bit); 66 } 67 68 void 69 dump_drop_page(vm_paddr_t pa) 70 { 71 int idx, bit; 72 73 pa >>= PAGE_SHIFT; 74 idx = pa >> 5; /* 2^5 = 32 */ 75 bit = pa & 31; 76 atomic_clear_int(&vm_page_dump[idx], 1ul << bit); 77 } 78 79 int 80 minidumpsys(struct dumperinfo *di) 81 { 82 83 return (pae_mode ? minidumpsys_pae(di) : minidumpsys_nopae(di)); 84 } 85 86