1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2014 Ian Lepore <[email protected]> 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 _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 void arm_physmem_init_kernel_globals(void); 60 void arm_physmem_print_tables(void); 61 62 /* 63 * Convenience routines for FDT. 64 */ 65 66 #ifdef FDT 67 68 #include <machine/ofw_machdep.h> 69 70 static inline void 71 arm_physmem_hardware_regions(struct mem_region * mrptr, int mrcount) 72 { 73 while (mrcount--) { 74 arm_physmem_hardware_region(mrptr->mr_start, mrptr->mr_size); 75 ++mrptr; 76 } 77 } 78 79 static inline void 80 arm_physmem_exclude_regions(struct mem_region * mrptr, int mrcount, 81 uint32_t exflags) 82 { 83 while (mrcount--) { 84 arm_physmem_exclude_region(mrptr->mr_start, mrptr->mr_size, 85 exflags); 86 ++mrptr; 87 } 88 } 89 90 #endif /* FDT */ 91 92 #endif 93 94