[U-Boot] [PATCH 02/12] arc: add mapping between physical and virtual address

Thomas Chou
2015-11-17T00:18:46Z

On 2015?11?16? 22:36, Thomas Chou wrote:
> Add mapping between physical and virtual address.
>
> Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
> ---
> arch/arc/include/asm/io.h | 28 ++++++++++++++++++++++++++++
> 1 file changed, 28 insertions(+)
>

Drop this patch as it is taken cared by Alexey Brodkin.

- Thomas

> diff --git a/arch/arc/include/asm/io.h b/arch/arc/include/asm/io.h
> index 24b7337..273e9f9 100644
> --- a/arch/arc/include/asm/io.h
> +++ b/arch/arc/include/asm/io.h
> @@ -15,6 +15,34 @@ static inline void sync(void)
> /* Not yet implemented */
> }
>
> +/*
> + * Given a physical address and a length, return a virtual address
> + * that can be used to access the memory range with the caching
> + * properties specified by "flags".
> + */
> +#define MAP_NOCACHE (0)
> +#define MAP_WRCOMBINE (0)
> +#define MAP_WRBACK (0)
> +#define MAP_WRTHROUGH (0)
> +
> +static inline void *map_physmem(phys_addr_t paddr, unsigned long len,
> + unsigned long flags)
> +{
> + return (void *)(uintptr_t)paddr;
> +}
> +
> +/*
> + * Take down a mapping set up by map_physmem().
> + */
> +static inline void unmap_physmem(void *vaddr, unsigned long flags)
> +{
> +}
> +
> +static inline phys_addr_t virt_to_phys(void *vaddr)
> +{
> + return (phys_addr_t)(uintptr_t)vaddr;
> +}
> +
> static inline u8 __raw_readb(const volatile void __iomem *addr)
> {
> u8 b;
>