Viewing file:  dcr-mmio.h (1 KB) -rw-r--r--
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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* (c) Copyright 2006 Benjamin Herrenschmidt, IBM Corp.
* <benh@kernel.crashing.org>
*/
#ifndef _ASM_POWERPC_DCR_MMIO_H
#define _ASM_POWERPC_DCR_MMIO_H
#ifdef __KERNEL__
#include <asm/io.h>
typedef struct {
void __iomem *token;
unsigned int stride;
unsigned int base;
} dcr_host_mmio_t;
static inline bool dcr_map_ok_mmio(dcr_host_mmio_t host)
{
return host.token != NULL;
}
extern dcr_host_mmio_t dcr_map_mmio(struct device_node *dev,
unsigned int dcr_n,
unsigned int dcr_c);
extern void dcr_unmap_mmio(dcr_host_mmio_t host, unsigned int dcr_c);
static inline u32 dcr_read_mmio(dcr_host_mmio_t host, unsigned int dcr_n)
{
return in_be32(host.token + ((host.base + dcr_n) * host.stride));
}
static inline void dcr_write_mmio(dcr_host_mmio_t host,
unsigned int dcr_n,
u32 value)
{
out_be32(host.token + ((host.base + dcr_n) * host.stride), value);
}
#endif /* __KERNEL__ */
#endif /* _ASM_POWERPC_DCR_MMIO_H */
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