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_ */ 92