19a90aa3dSFrançois Tigeot /* 2*f0bba3d1SFrançois Tigeot * Copyright (c) 2014-2018 François Tigeot <ftigeot@wolfpond.org> 39a90aa3dSFrançois Tigeot * All rights reserved. 49a90aa3dSFrançois Tigeot * 59a90aa3dSFrançois Tigeot * Redistribution and use in source and binary forms, with or without 69a90aa3dSFrançois Tigeot * modification, are permitted provided that the following conditions 79a90aa3dSFrançois Tigeot * are met: 89a90aa3dSFrançois Tigeot * 1. Redistributions of source code must retain the above copyright 99a90aa3dSFrançois Tigeot * notice unmodified, this list of conditions, and the following 109a90aa3dSFrançois Tigeot * disclaimer. 119a90aa3dSFrançois Tigeot * 2. Redistributions in binary form must reproduce the above copyright 129a90aa3dSFrançois Tigeot * notice, this list of conditions and the following disclaimer in the 139a90aa3dSFrançois Tigeot * documentation and/or other materials provided with the distribution. 149a90aa3dSFrançois Tigeot * 159a90aa3dSFrançois Tigeot * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 169a90aa3dSFrançois Tigeot * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 179a90aa3dSFrançois Tigeot * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 189a90aa3dSFrançois Tigeot * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 199a90aa3dSFrançois Tigeot * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 209a90aa3dSFrançois Tigeot * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 219a90aa3dSFrançois Tigeot * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 229a90aa3dSFrançois Tigeot * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 239a90aa3dSFrançois Tigeot * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 249a90aa3dSFrançois Tigeot * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 259a90aa3dSFrançois Tigeot */ 269a90aa3dSFrançois Tigeot 279a90aa3dSFrançois Tigeot #ifndef _LINUX_HIGHMEM_H_ 289a90aa3dSFrançois Tigeot #define _LINUX_HIGHMEM_H_ 299a90aa3dSFrançois Tigeot 309a90aa3dSFrançois Tigeot #include <machine/vmparam.h> 319a90aa3dSFrançois Tigeot 326431cd91SFrançois Tigeot #include <linux/kernel.h> 336431cd91SFrançois Tigeot #include <linux/bug.h> 346431cd91SFrançois Tigeot #include <linux/mm.h> 3501b43122SFrançois Tigeot #include <linux/uaccess.h> 361334141fSFrançois Tigeot #include <linux/hardirq.h> 3701b43122SFrançois Tigeot 38b86cbe23SFrançois Tigeot #include <asm/cacheflush.h> 39b86cbe23SFrançois Tigeot 40*f0bba3d1SFrançois Tigeot static inline struct page * 416e31eb98SFrançois Tigeot kmap_to_page(void *addr) 426e31eb98SFrançois Tigeot { 43*f0bba3d1SFrançois Tigeot return (struct page *)PHYS_TO_VM_PAGE(vtophys(addr)); 446e31eb98SFrançois Tigeot } 456e31eb98SFrançois Tigeot 46*f0bba3d1SFrançois Tigeot static inline void *kmap(struct page *pg) 479a90aa3dSFrançois Tigeot { 48*f0bba3d1SFrançois Tigeot return (void *)PHYS_TO_DMAP(VM_PAGE_TO_PHYS( (struct vm_page *)pg )); 499a90aa3dSFrançois Tigeot } 509a90aa3dSFrançois Tigeot 51*f0bba3d1SFrançois Tigeot static inline void kunmap(struct page *pg) 52e3440f96SFrançois Tigeot { 53e3440f96SFrançois Tigeot /* Nothing to do on systems with a direct memory map */ 54e3440f96SFrançois Tigeot } 55e3440f96SFrançois Tigeot 56*f0bba3d1SFrançois Tigeot static inline void *kmap_atomic(struct page *pg) 57e3440f96SFrançois Tigeot { 58*f0bba3d1SFrançois Tigeot return (void *)PHYS_TO_DMAP(VM_PAGE_TO_PHYS( (struct vm_page *)pg )); 59e3440f96SFrançois Tigeot } 60e3440f96SFrançois Tigeot 61e3440f96SFrançois Tigeot static inline void kunmap_atomic(void *vaddr) 629a90aa3dSFrançois Tigeot { 639a90aa3dSFrançois Tigeot /* Nothing to do on systems with a direct memory map */ 649a90aa3dSFrançois Tigeot } 659a90aa3dSFrançois Tigeot 669a90aa3dSFrançois Tigeot #endif /* _LINUX_HIGHMEM_H_ */ 67