On Fri, Aug 28, 2015 at 12:49:47PM +0100, Horia Geantă wrote:
> This will allow device drivers to consistently use io{read,write}XXbe
> macros also for 64-bit accesses.
>
> Signed-off-by: Alex Porosanu <alexandru.porosanu@xxxxxxxxxxxxx>
> Signed-off-by: Horia Geantă <horia.geanta@xxxxxxxxxxxxx>
> ---
> arch/arm64/include/asm/io.h | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/arch/arm64/include/asm/io.h b/arch/arm64/include/asm/io.h
> index 44be1e03ed65..9b6e408cfa51 100644
> --- a/arch/arm64/include/asm/io.h
> +++ b/arch/arm64/include/asm/io.h
> @@ -174,13 +174,15 @@ extern void __iomem *ioremap_cache(phys_addr_t phys_addr, size_t size);
> #define iounmap __iounmap
>
> /*
> - * io{read,write}{16,32}be() macros
> + * io{read,write}{16,32,64}be() macros
> */
> #define ioread16be(p) ({ __u16 __v = be16_to_cpu((__force __be16)__raw_readw(p)); __iormb(); __v; })
> #define ioread32be(p) ({ __u32 __v = be32_to_cpu((__force __be32)__raw_readl(p)); __iormb(); __v; })
> +#define ioread64be(p) ({ __u64 __v = be64_to_cpu((__force __be64)__raw_readq(p)); __iormb(); __v; })
>
> #define iowrite16be(v,p) ({ __iowmb(); __raw_writew((__force __u16)cpu_to_be16(v), p); })
> #define iowrite32be(v,p) ({ __iowmb(); __raw_writel((__force __u32)cpu_to_be32(v), p); })
> +#define iowrite64be(v,p) ({ __iowmb(); __raw_writeq((__force __u64)cpu_to_be64(v), p); })
This looks like the first instance of this in the tree, so perhaps it's
also worth adding a version to asm-generic/io.h predicated on
CONFIG_64BIT?
Will
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