Hello Vitaly,
On Thu, 5 Feb 2015 11:24:46 -0500, Vitaly Andrianov <vita...@ti.com>
wrote:
> This commit copies implementation of the find_next_zero_bit() from
> git://git.denx.de/u-boot.git/arch/mips/include/asm/bitops.h. v2014.07
>
> The function is required to enable MCAST_TFTP support for ARM platforms.
>
> Signed-off-by: Vitaly Andrianov <vita...@ti.com>
> ---
>
> arch/arm/include/asm/bitops.h | 43
> ++++++++++++++++++++++++++++++++++++++++---
> 1 file changed, 40 insertions(+), 3 deletions(-)
>
> diff --git a/arch/arm/include/asm/bitops.h b/arch/arm/include/asm/bitops.h
> index 597dafb..9b78043 100644
> --- a/arch/arm/include/asm/bitops.h
> +++ b/arch/arm/include/asm/bitops.h
> @@ -95,9 +95,6 @@ static inline int __test_and_change_bit(int nr, volatile
> void *addr)
> return (old & mask) != 0;
> }
>
> -extern int find_first_zero_bit(void * addr, unsigned size);
> -extern int find_next_zero_bit(void * addr, int size, int offset);
> -
> /*
> * This routine doesn't need to be atomic.
> */
> @@ -129,6 +126,43 @@ static inline unsigned long ffz(unsigned long word)
> return k;
> }
>
> +static inline int find_next_zero_bit(void *addr, int size, int offset)
> +{
> + unsigned long *p = ((unsigned long *)addr) + (offset >> 5);
> + unsigned long result = offset & ~31UL;
> + unsigned long tmp;
> +
> + if (offset >= size)
> + return size;
> + size -= result;
> + offset &= 31UL;
> + if (offset) {
> + tmp = *(p++);
> + tmp |= ~0UL >> (32-offset);
> + if (size < 32)
> + goto found_first;
> + if (~tmp)
> + goto found_middle;
> + size -= 32;
> + result += 32;
> + }
> + while (size & ~31UL) {
> + tmp = *(p++);arm: implement find_next_zero_bit function
> + if (~tmp)
> + goto found_middle;
> + result += 32;
> + size -= 32;
> + }
> + if (!size)
> + return result;
> + tmp = *p;
> +
> +found_first:
> + tmp |= ~0UL >> size;
> +found_middle:
> + return result + ffz(tmp);
> +}
> +
> /*
> * hweightN: returns the hamming weight (i.e. the number
> * of bits set) of a N-bit word
> @@ -138,6 +172,9 @@ static inline unsigned long ffz(unsigned long word)
> #define hweight16(x) generic_hweight16(x)
> #define hweight8(x) generic_hweight8(x)
>
> +#define find_first_zero_bit(addr, size) \
> + find_next_zero_bit((addr), (size), 0)
> +
> #define ext2_set_bit test_and_set_bit
> #define ext2_clear_bit test_and_clear_bit
> #define ext2_test_bit test_bit
> --
> 1.9.1
>
Applied to u-boot-arm/master, thanks!
Amicalement,
--
Albert.
_______________________________________________
U-Boot mailing list
U-Boot@lists.denx.de
http://lists.denx.de/mailman/listinfo/u-boot
