| 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 | |
| 54 | void physmem_hardware_region(uint64_t pa, uint64_t sz); |
| 55 | void physmem_exclude_region(vm_paddr_t pa, vm_size_t sz, uint32_t flags); |
| 56 | size_t physmem_avail(vm_paddr_t *avail, size_t maxavail); |
| 57 | void physmem_init_kernel_globals(void); |
| 58 | void physmem_print_tables(void); |
| 59 | bool 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 | |
| 69 | static inline void |
| 70 | physmem_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 | |
| 78 | static inline void |
| 79 | physmem_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_ */ |