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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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c81d64d3dc
This patch adds generic io{read|write}64[be]{_lo_hi|_hi_lo} macros if
they are not already defined by the architecture. (As they are provided
by the generic iomap library).
The patch also points io{read|write}64[be] to the variant specified by the
header name.
This is because new drivers are encouraged to use ioreadXX, et al instead
of readX[1], et al -- and mixing ioreadXX with readq is pretty ugly.
[1] LDD3: section 9.4.2
Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Alan Cox <gnomes@lxorguk.ukuu.org.uk>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
123 lines
2.4 KiB
C
123 lines
2.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LINUX_IO_64_NONATOMIC_HI_LO_H_
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#define _LINUX_IO_64_NONATOMIC_HI_LO_H_
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#include <linux/io.h>
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#include <asm-generic/int-ll64.h>
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static inline __u64 hi_lo_readq(const volatile void __iomem *addr)
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{
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const volatile u32 __iomem *p = addr;
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u32 low, high;
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high = readl(p + 1);
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low = readl(p);
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return low + ((u64)high << 32);
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}
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static inline void hi_lo_writeq(__u64 val, volatile void __iomem *addr)
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{
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writel(val >> 32, addr + 4);
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writel(val, addr);
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}
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static inline __u64 hi_lo_readq_relaxed(const volatile void __iomem *addr)
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{
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const volatile u32 __iomem *p = addr;
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u32 low, high;
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high = readl_relaxed(p + 1);
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low = readl_relaxed(p);
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return low + ((u64)high << 32);
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}
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static inline void hi_lo_writeq_relaxed(__u64 val, volatile void __iomem *addr)
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{
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writel_relaxed(val >> 32, addr + 4);
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writel_relaxed(val, addr);
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}
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#ifndef readq
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#define readq hi_lo_readq
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#endif
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#ifndef writeq
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#define writeq hi_lo_writeq
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#endif
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#ifndef readq_relaxed
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#define readq_relaxed hi_lo_readq_relaxed
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#endif
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#ifndef writeq_relaxed
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#define writeq_relaxed hi_lo_writeq_relaxed
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#endif
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#ifndef ioread64_hi_lo
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#define ioread64_hi_lo ioread64_hi_lo
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static inline u64 ioread64_hi_lo(void __iomem *addr)
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{
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u32 low, high;
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high = ioread32(addr + sizeof(u32));
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low = ioread32(addr);
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return low + ((u64)high << 32);
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}
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#endif
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#ifndef iowrite64_hi_lo
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#define iowrite64_hi_lo iowrite64_hi_lo
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static inline void iowrite64_hi_lo(u64 val, void __iomem *addr)
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{
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iowrite32(val >> 32, addr + sizeof(u32));
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iowrite32(val, addr);
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}
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#endif
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#ifndef ioread64be_hi_lo
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#define ioread64be_hi_lo ioread64be_hi_lo
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static inline u64 ioread64be_hi_lo(void __iomem *addr)
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{
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u32 low, high;
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high = ioread32be(addr);
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low = ioread32be(addr + sizeof(u32));
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return low + ((u64)high << 32);
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}
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#endif
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#ifndef iowrite64be_hi_lo
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#define iowrite64be_hi_lo iowrite64be_hi_lo
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static inline void iowrite64be_hi_lo(u64 val, void __iomem *addr)
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{
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iowrite32be(val >> 32, addr);
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iowrite32be(val, addr + sizeof(u32));
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}
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#endif
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#ifndef ioread64
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#define ioread64_is_nonatomic
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#define ioread64 ioread64_hi_lo
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#endif
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#ifndef iowrite64
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#define iowrite64_is_nonatomic
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#define iowrite64 iowrite64_hi_lo
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#endif
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#ifndef ioread64be
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#define ioread64be_is_nonatomic
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#define ioread64be ioread64be_hi_lo
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#endif
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#ifndef iowrite64be
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#define iowrite64be_is_nonatomic
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#define iowrite64be iowrite64be_hi_lo
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#endif
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#endif /* _LINUX_IO_64_NONATOMIC_HI_LO_H_ */
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