1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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 * $FreeBSD: releng/12.0/sys/arm/include/physmem.h 334162 2018-05-24 15:32:49Z andrew $
29 */
30
31 #ifndef _MACHINE_PHYSMEM_H_
32 #define _MACHINE_PHYSMEM_H_
33
34 /*
35 * The physical address at which the kernel was loaded.
36 */
37 extern vm_paddr_t arm_physmem_kernaddr;
38
39 /*
40 * Routines to help configure physical ram.
41 *
42 * Multiple regions of contiguous physical ram can be added (in any order).
43 *
44 * Multiple regions of physical ram that should be excluded from crash dumps, or
45 * memory allocation, or both, can be added (in any order).
46 *
47 * After all early kernel init is done and it's time to configure all
48 * remainining non-excluded physical ram for use by other parts of the kernel,
49 * arm_physmem_init_kernel_globals() processes the hardware regions and
50 * exclusion regions to generate the global dump_avail and phys_avail arrays
51 * that communicate physical ram configuration to other parts of the kernel.
52 */
53
54 #define EXFLAG_NODUMP 0x01
55 #define EXFLAG_NOALLOC 0x02
56
57 void arm_physmem_hardware_region(uint64_t pa, uint64_t sz);
58 void arm_physmem_exclude_region(vm_paddr_t pa, vm_size_t sz, uint32_t flags);
59 size_t arm_physmem_avail(vm_paddr_t *avail, size_t maxavail);
60 void arm_physmem_init_kernel_globals(void);
61 void arm_physmem_print_tables(void);
62
63 /*
64 * Convenience routines for FDT.
65 */
66
67 #ifdef FDT
68
69 #include <machine/ofw_machdep.h>
70
71 static inline void
72 arm_physmem_hardware_regions(struct mem_region * mrptr, int mrcount)
73 {
74 while (mrcount--) {
75 arm_physmem_hardware_region(mrptr->mr_start, mrptr->mr_size);
76 ++mrptr;
77 }
78 }
79
80 static inline void
81 arm_physmem_exclude_regions(struct mem_region * mrptr, int mrcount,
82 uint32_t exflags)
83 {
84 while (mrcount--) {
85 arm_physmem_exclude_region(mrptr->mr_start, mrptr->mr_size,
86 exflags);
87 ++mrptr;
88 }
89 }
90
91 #endif /* FDT */
92
93 #endif
94
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