lkml.org 
[lkml]   [2014]   [Jul]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 3/3] arm64: Use include/asm-generic/io.h
On Wed, Jul 09, 2014 at 04:11:39PM +0100, Thierry Reding wrote:
> diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
> index a497556520d4..a428ac1573e7 100644
> --- a/arch/arm64/Kconfig
> +++ b/arch/arm64/Kconfig
> @@ -20,7 +20,6 @@ config ARM64
> select GENERIC_CLOCKEVENTS_BROADCAST if SMP
> select GENERIC_CPU_AUTOPROBE
> select GENERIC_EARLY_IOREMAP
> - select GENERIC_IOMAP
> select GENERIC_IRQ_PROBE
> select GENERIC_IRQ_SHOW
> select GENERIC_SCHED_CLOCK
> diff --git a/arch/arm64/include/asm/io.h b/arch/arm64/include/asm/io.h
> index e0ecdcf6632d..00c7f9faf2a3 100644
> --- a/arch/arm64/include/asm/io.h
> +++ b/arch/arm64/include/asm/io.h
[...]
> @@ -235,8 +155,7 @@ extern void __iomem *ioremap_cache(phys_addr_t phys_addr, size_t size);
> #define ioremap_wc(addr, size) __ioremap((addr), (size), __pgprot(PROT_NORMAL_NC))
> #define iounmap __iounmap
>
> -#define ARCH_HAS_IOREMAP_WC
> -#include <asm-generic/iomap.h>
> +#include <asm-generic/io.h>

We don't currently have PCIe support in mainline for arm64 but what I
had in mind with the generic iomap is that functions like ioread32_rep
first check whether the address is an IO address or a memory one and
calls the insl or mmio_insl accordingly. With your generic
implementation, this check disappears.

The question is whether this functionality would still be needed.

--
Catalin


\
 
 \ /
  Last update: 2014-07-10 13:41    [W:0.113 / U:54.004 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site