1/*-
2 * Copyright (c) 2002 Marcel Moolenaar
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD: stable/11/sys/arm/arm/dump_machdep.c 327658 2018-01-07 00:04:13Z ian $");
29
30#include "opt_watchdog.h"
31
32#include <sys/param.h>
33#include <sys/systm.h>
34#include <sys/conf.h>
35#include <sys/sysctl.h>
36#include <sys/kernel.h>
37#include <sys/proc.h>
38#include <sys/kerneldump.h>
39
40#include <vm/vm.h>
41#include <vm/pmap.h>
42#include <machine/dump.h>
43#include <machine/elf.h>
44#include <machine/md_var.h>
45#include <machine/pcb.h>
46#include <machine/armreg.h>
47#include <machine/vmparam.h>	/* For KERNVIRTADDR */
48
49int do_minidump = 1;
50SYSCTL_INT(_debug, OID_AUTO, minidump, CTLFLAG_RWTUN, &do_minidump, 0,
51    "Enable mini crash dumps");
52
53void
54dumpsys_wbinv_all(void)
55{
56
57	/*
58	 * Make sure we write coherent data.  Note that in the SMP case this
59	 * only operates on the L1 cache of the current CPU, but all other CPUs
60	 * have already been stopped, and their flush/invalidate was done as
61	 * part of stopping.
62	 */
63	dcache_wbinv_poc_all();
64#ifdef __XSCALE__
65	xscale_cache_clean_minidata();
66#endif
67}
68
69void
70dumpsys_map_chunk(vm_paddr_t pa, size_t chunk, void **va)
71{
72	vm_paddr_t a;
73	int i;
74
75	for (i = 0; i < chunk; i++) {
76		a = pa + i * PAGE_SIZE;
77		*va = pmap_kenter_temporary(trunc_page(a), i);
78	}
79}
80
81/*
82 * Add a header to be used by libkvm to get the va to pa delta
83 */
84int
85dumpsys_write_aux_headers(struct dumperinfo *di)
86{
87	Elf_Phdr phdr;
88	int error;
89
90	bzero(&phdr, sizeof(phdr));
91	phdr.p_type = PT_DUMP_DELTA;
92	phdr.p_flags = PF_R;			/* XXX */
93	phdr.p_offset = 0;
94	phdr.p_vaddr = KERNVIRTADDR;
95	phdr.p_paddr = pmap_kextract(KERNVIRTADDR);
96	phdr.p_filesz = 0;
97	phdr.p_memsz = 0;
98	phdr.p_align = PAGE_SIZE;
99
100	error = dumpsys_buf_write(di, (char*)&phdr, sizeof(phdr));
101	return (error);
102}
103