mirror of https://gitee.com/openkylin/linux.git
52 lines
1.7 KiB
C
52 lines
1.7 KiB
C
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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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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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* the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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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 { void __iomem *token; unsigned int stride; } dcr_host_t;
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#define DCR_MAP_OK(host) ((host).token != NULL)
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extern dcr_host_t dcr_map(struct device_node *dev, unsigned int dcr_n,
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unsigned int dcr_c);
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extern void dcr_unmap(dcr_host_t host, unsigned int dcr_n, unsigned int dcr_c);
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static inline u32 dcr_read(dcr_host_t host, unsigned int dcr_n)
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{
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return in_be32(host.token + dcr_n * host.stride);
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}
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static inline void dcr_write(dcr_host_t host, unsigned int dcr_n, u32 value)
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{
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out_be32(host.token + dcr_n * host.stride, value);
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}
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extern u64 of_translate_dcr_address(struct device_node *dev,
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unsigned int dcr_n,
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unsigned int *stride);
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#endif /* __KERNEL__ */
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#endif /* _ASM_POWERPC_DCR_MMIO_H */
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