1/*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2014 Ian Lepore <ian@freebsd.org>
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
29#ifndef	_SYS_PHYSMEM_H_
30#define	_SYS_PHYSMEM_H_
31
32#ifndef _KERNEL
33#include <stdbool.h>
34#endif
35
36/*
37 * Routines to help configure physical ram.
38 *
39 * Multiple regions of contiguous physical ram can be added (in any order).
40 *
41 * Multiple regions of physical ram that should be excluded from crash dumps, or
42 * memory allocation, or both, can be added (in any order).
43 *
44 * After all early kernel init is done and it's time to configure all
45 * remainining non-excluded physical ram for use by other parts of the kernel,
46 * physmem_init_kernel_globals() processes the hardware regions and
47 * exclusion regions to generate the global dump_avail and phys_avail arrays
48 * that communicate physical ram configuration to other parts of the kernel.
49 */
50
51#define	EXFLAG_NODUMP	0x01
52#define	EXFLAG_NOALLOC	0x02
53
54void physmem_hardware_region(uint64_t pa, uint64_t sz);
55void physmem_exclude_region(vm_paddr_t pa, vm_size_t sz, uint32_t flags);
56size_t physmem_avail(vm_paddr_t *avail, size_t maxavail);
57void physmem_init_kernel_globals(void);
58void physmem_print_tables(void);
59bool physmem_excluded(vm_paddr_t pa, vm_size_t sz);
60
61/*
62 * Convenience routines for FDT.
63 */
64
65#ifdef FDT
66
67#include <machine/ofw_machdep.h>
68
69static inline void
70physmem_hardware_regions(struct mem_region * mrptr, int mrcount)
71{
72	while (mrcount--) {
73		physmem_hardware_region(mrptr->mr_start, mrptr->mr_size);
74		++mrptr;
75	}
76}
77
78static inline void
79physmem_exclude_regions(struct mem_region * mrptr, int mrcount,
80    uint32_t exflags)
81{
82	while (mrcount--) {
83		physmem_exclude_region(mrptr->mr_start, mrptr->mr_size,
84		    exflags);
85		++mrptr;
86	}
87}
88
89#endif /* FDT */
90
91#endif /* !_SYS_PHYSMEM_H_ */
92