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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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0b94a1eeee
In its current form, dcr_map() doesn't remember the base address you passed it, which means you need to store it somewhere else. Rather than adding the base to another struct it seems simpler to store it in the dcr_host_t. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
56 lines
1.7 KiB
C
56 lines
1.7 KiB
C
/*
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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 {
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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_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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