On Sun, 27 Mar 2011 22:48:50 -0700
Lei Wen <lei...@marvell.com> wrote:
> Those api take use of read*/write* to align the current dmb usage.
> Also this could short the code length in one line.
>
> Signed-off-by: Lei Wen <lei...@marvell.com>
> ---
> arch/arm/include/asm/io.h | 8 ++++++++
> 1 files changed, 8 insertions(+), 0 deletions(-)
>
> diff --git a/arch/arm/include/asm/io.h b/arch/arm/include/asm/io.h
> index 1fbc531..71e85e8 100644
> --- a/arch/arm/include/asm/io.h
> +++ b/arch/arm/include/asm/io.h
> @@ -141,6 +141,14 @@ extern inline void __raw_readsl(unsigned int addr, void
> *data, int longlen)
> #define readw(c) ({ u16 __v = __arch_getw(c); __iormb(); __v; })
> #define readl(c) ({ u32 __v = __arch_getl(c); __iormb(); __v; })
>
> +#define orb(v,c) writeb(readb(c) | v, c)
> +#define orw(v,c) writew(readw(c) | v, c)
> +#define orl(v,c) writel(readl(c) | v, c)
> +
> +#define andb(v,c) writeb(readb(c) & v, c)
> +#define andw(v,c) writew(readw(c) & v, c)
> +#define andl(v,c) writel(readl(c) & v, c)
> +
> /*
> * The compiler seems to be incapable of optimising constants
> * properly. Spell it out to the compiler in some cases.
What does this do that setbits*/clrbits* don't?
Other than be missing parentheses around "v", causing problems if a
complex expression is passed in.
-scott
_______________________________________________
U-Boot mailing list
U-Boot@lists.denx.de
http://lists.denx.de/mailman/listinfo/u-boot
