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* (c) Copyright 2006 Benjamin Herrenschmidt, IBM Corp.
* <>
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* the GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#ifdef __KERNEL__
#include <asm/io.h>
typedef struct {
void __iomem *token;
unsigned int stride;
unsigned int base;
} dcr_host_t;
#define DCR_MAP_OK(host) ((host).token != NULL)
extern dcr_host_t dcr_map(struct device_node *dev, unsigned int dcr_n,
unsigned int dcr_c);
extern void dcr_unmap(dcr_host_t host, unsigned int dcr_c);
static inline u32 dcr_read(dcr_host_t host, unsigned int dcr_n)
return in_be32(host.token + ((host.base + dcr_n) * host.stride));
static inline void dcr_write(dcr_host_t host, unsigned int dcr_n, u32 value)
out_be32(host.token + ((host.base + dcr_n) * host.stride), value);
extern u64 of_translate_dcr_address(struct device_node *dev,
unsigned int dcr_n,
unsigned int *stride);
#endif /* __KERNEL__ */
#endif /* _ASM_POWERPC_DCR_MMIO_H */