/* * xrp_address_map: CPU->DSP physical address translator * * Copyright (c) 2017 Cadence Design Systems, Inc. * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be included * in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. * * Alternatively you can use and distribute this file under the terms of * the GNU General Public License version 2 or later. */ #ifndef XRP_ADDRESS_MAP_H #define XRP_ADDRESS_MAP_H #include #define XRP_NO_TRANSLATION ((u32)~0ul) struct xrp_address_map_entry { phys_addr_t src_addr; u32 dst_addr; u32 size; }; struct xrp_address_map { unsigned n; struct xrp_address_map_entry *entry; }; int xrp_init_address_map(struct device *dev, struct xrp_address_map *map); void xrp_free_address_map(struct xrp_address_map *map); struct xrp_address_map_entry * xrp_get_address_mapping(const struct xrp_address_map *map, phys_addr_t addr); u32 xrp_translate_to_dsp(const struct xrp_address_map *map, phys_addr_t addr); phys_addr_t xrp_translate_dsp_to_host(const struct xrp_address_map *map,u32 addr); static inline int xrp_compare_address(phys_addr_t addr, const struct xrp_address_map_entry *entry) { if (addr < entry->src_addr) return -1; if (addr - entry->src_addr < entry->size) return 0; return 1; } static inline int xrp_compare_dev_address(phys_addr_t addr, const struct xrp_address_map_entry *entry) { if (addr < entry->dst_addr) return -1; if (addr - entry->dst_addr < entry->size) return 0; return 1; } #endif