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