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