1/* 2 * (c) Copyright 2006 Benjamin Herrenschmidt, IBM Corp. 3 * <benh@kernel.crashing.org> 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; either version 2 of the License, or 8 * (at your option) any later version. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See 13 * the GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software 17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 18 */ 19 20#ifndef _ASM_POWERPC_DCR_MMIO_H 21#define _ASM_POWERPC_DCR_MMIO_H 22#ifdef __KERNEL__ 23 24#include <asm/io.h> 25 26typedef struct { 27 void __iomem *token; 28 unsigned int stride; 29 unsigned int base; 30} dcr_host_mmio_t; 31 32static inline bool dcr_map_ok_mmio(dcr_host_mmio_t host) 33{ 34 return host.token != NULL; 35} 36 37extern dcr_host_mmio_t dcr_map_mmio(struct device_node *dev, 38 unsigned int dcr_n, 39 unsigned int dcr_c); 40extern void dcr_unmap_mmio(dcr_host_mmio_t host, unsigned int dcr_c); 41 42static inline u32 dcr_read_mmio(dcr_host_mmio_t host, unsigned int dcr_n) 43{ 44 return in_be32(host.token + ((host.base + dcr_n) * host.stride)); 45} 46 47static inline void dcr_write_mmio(dcr_host_mmio_t host, 48 unsigned int dcr_n, 49 u32 value) 50{ 51 out_be32(host.token + ((host.base + dcr_n) * host.stride), value); 52} 53 54extern u64 of_translate_dcr_address(struct device_node *dev, 55 unsigned int dcr_n, 56 unsigned int *stride); 57 58#endif /* __KERNEL__ */ 59#endif /* _ASM_POWERPC_DCR_MMIO_H */ 60