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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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dc90c89036
There are two incompatible sets of definitions of these eight functions: On 64-bit architectures setting CONFIG_HAS_IOPORT, they turn into either pair of 32-bit PIO (inl/outl) accesses or a single 64-bit MMIO (readq/writeq). On other 64-bit architectures, they are always split into 32-bit accesses. Depending on which header gets included in a driver, there are additionally definitions for ioread64()/iowrite64() that are expected to produce a 64-bit register MMIO access on all 64-bit architectures. To separate the conflicting definitions, make the version in include/linux/io-64-nonatomic-*.h visible on all architectures but pick the one from lib/iomap.c on architectures that set CONFIG_GENERIC_IOMAP in place of the default fallback. Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
139 lines
2.8 KiB
C
139 lines
2.8 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(const 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(const 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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#if defined(CONFIG_GENERIC_IOMAP) && defined(CONFIG_64BIT)
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#define ioread64 __ioread64_hi_lo
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#else
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#define ioread64 ioread64_hi_lo
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#endif
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#endif
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#ifndef iowrite64
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#define iowrite64_is_nonatomic
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#if defined(CONFIG_GENERIC_IOMAP) && defined(CONFIG_64BIT)
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#define iowrite64 __iowrite64_hi_lo
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#else
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#define iowrite64 iowrite64_hi_lo
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#endif
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#endif
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#ifndef ioread64be
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#define ioread64be_is_nonatomic
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#if defined(CONFIG_GENERIC_IOMAP) && defined(CONFIG_64BIT)
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#define ioread64be __ioread64be_hi_lo
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#else
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#define ioread64be ioread64be_hi_lo
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#endif
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#endif
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#ifndef iowrite64be
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#define iowrite64be_is_nonatomic
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#if defined(CONFIG_GENERIC_IOMAP) && defined(CONFIG_64BIT)
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#define iowrite64be __iowrite64be_hi_lo
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#else
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#define iowrite64be iowrite64be_hi_lo
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#endif
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#endif
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#endif /* _LINUX_IO_64_NONATOMIC_HI_LO_H_ */
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