1 /* 2 * Copyright (c) 2011 The Chromium OS Authors. 3 * 4 * SPDX-License-Identifier: GPL-2.0+ 5 */ 6 7 #ifndef __SANDBOX_ASM_IO_H 8 #define __SANDBOX_ASM_IO_H 9 10 /* 11 * Given a physical address and a length, return a virtual address 12 * that can be used to access the memory range with the caching 13 * properties specified by "flags". 14 */ 15 #define MAP_NOCACHE (0) 16 #define MAP_WRCOMBINE (0) 17 #define MAP_WRBACK (0) 18 #define MAP_WRTHROUGH (0) 19 20 void *map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags); 21 22 /* 23 * Take down a mapping set up by map_physmem(). 24 */ 25 static inline void unmap_physmem(void *vaddr, unsigned long flags) 26 { 27 28 } 29 30 /* For sandbox, we want addresses to point into our RAM buffer */ 31 static inline void *map_sysmem(phys_addr_t paddr, unsigned long len) 32 { 33 return map_physmem(paddr, len, MAP_WRBACK); 34 } 35 36 static inline void unmap_sysmem(const void *vaddr) 37 { 38 } 39 40 /* Map from a pointer to our RAM buffer */ 41 phys_addr_t map_to_sysmem(const void *ptr); 42 43 #endif 44