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 * $FreeBSD$ 29 */ 30 31 #ifndef _SYS_PHYSMEM_H_ 32 #define _SYS_PHYSMEM_H_ 33 34 #ifndef _KERNEL 35 #include <stdbool.h> 36 #endif 37 38 /* 39 * Routines to help configure physical ram. 40 * 41 * Multiple regions of contiguous physical ram can be added (in any order). 42 * 43 * Multiple regions of physical ram that should be excluded from crash dumps, or 44 * memory allocation, or both, can be added (in any order). 45 * 46 * After all early kernel init is done and it's time to configure all 47 * remainining non-excluded physical ram for use by other parts of the kernel, 48 * physmem_init_kernel_globals() processes the hardware regions and 49 * exclusion regions to generate the global dump_avail and phys_avail arrays 50 * that communicate physical ram configuration to other parts of the kernel. 51 */ 52 53 #define EXFLAG_NODUMP 0x01 54 #define EXFLAG_NOALLOC 0x02 55 56 void physmem_hardware_region(uint64_t pa, uint64_t sz); 57 void physmem_exclude_region(vm_paddr_t pa, vm_size_t sz, uint32_t flags); 58 size_t physmem_avail(vm_paddr_t *avail, size_t maxavail); 59 void physmem_init_kernel_globals(void); 60 void physmem_print_tables(void); 61 bool physmem_excluded(vm_paddr_t pa, vm_size_t sz); 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 physmem_hardware_regions(struct mem_region * mrptr, int mrcount) 73 { 74 while (mrcount--) { 75 physmem_hardware_region(mrptr->mr_start, mrptr->mr_size); 76 ++mrptr; 77 } 78 } 79 80 static inline void 81 physmem_exclude_regions(struct mem_region * mrptr, int mrcount, 82 uint32_t exflags) 83 { 84 while (mrcount--) { 85 physmem_exclude_region(mrptr->mr_start, mrptr->mr_size, 86 exflags); 87 ++mrptr; 88 } 89 } 90 91 #endif /* FDT */ 92 93 #endif /* !_SYS_PHYSMEM_H_ */ 94