/* * Copyright (c) 2007 Apple Inc. All rights reserved. * * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. The rights granted to you under the License * may not be used to create, or enable the creation or redistribution of, * unlawful or unlicensed copies of an Apple operating system, or to * circumvent, violate, or enable the circumvention or violation of, any * terms of an Apple operating system software license agreement. * * Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ /* * @OSF_COPYRIGHT@ */ /* * Mach Operating System Copyright (c) 1991,1990 Carnegie Mellon University * All Rights Reserved. * * Permission to use, copy, modify and distribute this software and its * documentation is hereby granted, provided that both the copyright notice * and this permission notice appear in all copies of the software, * derivative works or modified versions, and any portions thereof, and that * both notices appear in supporting documentation. * * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" CONDITION. * CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR ANY DAMAGES * WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. * * Carnegie Mellon requests users of this software to return to * * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU * School of Computer Science Carnegie Mellon University Pittsburgh PA * 15213-3890 * * any improvements or extensions that they make and grant Carnegie Mellon the * rights to redistribute these changes. */ /* */ #include <mach/vm_param.h> #include <vm/vm_kern.h> #include <vm/vm_map.h> #include <arm/pmap.h> #include <arm/io_map_entries.h> #include <san/kasan.h> extern vm_offset_t virtual_space_start; /* Next available kernel VA */ /* * Allocate and map memory for devices that may need to be mapped before * Mach VM is running. */ vm_offset_t io_map(vm_map_offset_t phys_addr, vm_size_t size, unsigned int flags) { return io_map_with_prot(phys_addr, size, flags, VM_PROT_READ | VM_PROT_WRITE); } /* * Allocate and map memory for devices that may need to be mapped before * Mach VM is running. Allows caller to specify mapping protection */ vm_offset_t io_map_with_prot(vm_map_offset_t phys_addr, vm_size_t size, unsigned int flags, vm_prot_t prot) { vm_offset_t start, start_offset; start_offset = phys_addr & PAGE_MASK; size += start_offset; phys_addr -= start_offset; if (kernel_map == VM_MAP_NULL) { /* * VM is not initialized. Grab memory. */ start = virtual_space_start; virtual_space_start += round_page(size); assert(flags == VM_WIMG_WCOMB || flags == VM_WIMG_IO); if (flags == VM_WIMG_WCOMB) { (void) pmap_map_bd_with_options(start, phys_addr, phys_addr + round_page(size), prot, PMAP_MAP_BD_WCOMB); } else { (void) pmap_map_bd(start, phys_addr, phys_addr + round_page(size), prot); } } else { (void) kmem_alloc_pageable(kernel_map, &start, round_page(size), VM_KERN_MEMORY_IOKIT); (void) pmap_map(start, phys_addr, phys_addr + round_page(size), prot, flags); } #if KASAN kasan_notify_address(start + start_offset, size); #endif return start + start_offset; } /* just wrap this since io_map handles it */ vm_offset_t io_map_spec(vm_map_offset_t phys_addr, vm_size_t size, unsigned int flags) { return io_map(phys_addr, size, flags); }