Am Freitag, den 11.08.2017, 15:55 +0200 schrieb Oleksij Rempel:
> From: Antony Pavlov <antonynpavlov@xxxxxxxxx>
>
> Signed-off-by: Antony Pavlov <antonynpavlov@xxxxxxxxx>
> Signed-off-by: Peter Mamonov <pmamonov@xxxxxxxxx>
> Signed-off-by: Oleksij Rempel <linux@xxxxxxxxxxxxxxxx>
> ---
> changes.
> v2:
> - make use of use CPHYSADDR and CKSEG0ADDR
>
> arch/mips/include/asm/io.h | 35 +++++++++++++++++++++++++++++++++++
> 1 file changed, 35 insertions(+)
>
> diff --git a/arch/mips/include/asm/io.h b/arch/mips/include/asm/io.h
> index 4bee5913a..d4eb623c3 100644
> --- a/arch/mips/include/asm/io.h
> +++ b/arch/mips/include/asm/io.h
> @@ -12,11 +12,46 @@
>
> #include <linux/compiler.h>
> #include <asm/types.h>
> +#include <asm/addrspace.h>
> #include <asm/byteorder.h>
>
> void dma_flush_range(unsigned long, unsigned long);
> void dma_inv_range(unsigned long, unsigned long);
>
> +/*
> + * virt_to_phys - map virtual addresses to physical
> + * @address: address to remap
> + *
> + * The returned physical address is the physical (CPU) mapping for
> + * the memory address given. It is only valid to use this function on
> + * addresses directly mapped or allocated via kmalloc.
The last sentence in this...
> + * This function does not give bus mappings for DMA transfers. In
> + * almost all conceivable cases a device driver should not be using
> + * this function
> + */
> +static inline unsigned long virt_to_phys(const void *address)
> +{
> + return (unsigned long)CPHYSADDR(address);
> +}
> +
> +/*
> + * phys_to_virt - map physical address to virtual
> + * @address: address to remap
> + *
> + * The returned virtual address is a current CPU mapping for
> + * the memory address given. It is only valid to use this function on
> + * addresses that have a kernel mapping
... and this paragraph have no meaning Barebox at all.
> + * This function does not handle bus mappings for DMA transfers. In
> + * almost all conceivable cases a device driver should not be using
> + * this function
> + */
> +static inline void *phys_to_virt(unsigned long address)
> +{
> + return (void *)CKSEG0ADDR(address);
> +}
> +
> #define IO_SPACE_LIMIT 0
>
> /*****************************************************************************/
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