[U-Boot] [PATCH] nios2: add clear and set bits macros

[Chin Liang See <clsee@altera.com>]

Hi Thomas,

On Thu, 2015-09-24 at 14:47 +0800, thomas at wytron.com.tw wrote:
> These macros can be used to clear and set multiple bits
> in a register using a single call.
> 
> Signed-off-by: Thomas Chou <thomas@wytron.com.tw>

Thanks for the patch.
Sorry for the late comments as noticed all my mail for last few days was
stuck in mail server.

> ---
>  arch/nios2/include/asm/io.h | 57 +++++++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 57 insertions(+)
> 
> diff --git a/arch/nios2/include/asm/io.h b/arch/nios2/include/asm/io.h
> index b4bd20f..123e885 100644
> --- a/arch/nios2/include/asm/io.h
> +++ b/arch/nios2/include/asm/io.h
> @@ -116,4 +116,61 @@ static inline void outsl (unsigned long port, const void *src, unsigned long cou
>  	while (count--) outl (*p++, port);
>  }
>  
> +/*
> + * Clear and set bits in one shot. These macros can be used to clear and
> + * set multiple bits in a register using a single call. These macros can
> + * also be used to set a multiple-bit bit pattern using a mask, by
> + * specifying the mask in the 'clear' parameter and the new bit pattern
> + * in the 'set' parameter.
> + */
> +
> +#define out_arch(type,endian,a,v)	__raw_write##type(cpu_to_##endian(v),a)
> +#define in_arch(type,endian,a)		endian##_to_cpu(__raw_read##type(a))
> +
> +#define out_le64(a,v)	out_arch(q,le64,a,v)

The 64bit support (q) is not yet available. This will break if someone
using this.


> +#define out_le32(a,v)	out_arch(l,le32,a,v)
> +#define out_le16(a,v)	out_arch(w,le16,a,v)
> +
> +#define in_le64(a)	in_arch(q,le64,a)

same as above

Thanks
Chin Liang

> +#define in_le32(a)	in_arch(l,le32,a)
> +#define in_le16(a)	in_arch(w,le16,a)
> +
> +#define out_be32(a,v)	out_arch(l,be32,a,v)
> +#define out_be16(a,v)	out_arch(w,be16,a,v)
> +
> +#define in_be32(a)	in_arch(l,be32,a)
> +#define in_be16(a)	in_arch(w,be16,a)
> +
> +#define out_8(a,v)	__raw_writeb(v,a)
> +#define in_8(a)		__raw_readb(a)
> +
> +#define clrbits(type, addr, clear) \
> +	out_##type((addr), in_##type(addr) & ~(clear))
> +
> +#define setbits(type, addr, set) \
> +	out_##type((addr), in_##type(addr) | (set))
> +
> +#define clrsetbits(type, addr, clear, set) \
> +	out_##type((addr), (in_##type(addr) & ~(clear)) | (set))
> +
> +#define clrbits_be32(addr, clear) clrbits(be32, addr, clear)
> +#define setbits_be32(addr, set) setbits(be32, addr, set)
> +#define clrsetbits_be32(addr, clear, set) clrsetbits(be32, addr, clear, set)
> +
> +#define clrbits_le32(addr, clear) clrbits(le32, addr, clear)
> +#define setbits_le32(addr, set) setbits(le32, addr, set)
> +#define clrsetbits_le32(addr, clear, set) clrsetbits(le32, addr, clear, set)
> +
> +#define clrbits_be16(addr, clear) clrbits(be16, addr, clear)
> +#define setbits_be16(addr, set) setbits(be16, addr, set)
> +#define clrsetbits_be16(addr, clear, set) clrsetbits(be16, addr, clear, set)
> +
> +#define clrbits_le16(addr, clear) clrbits(le16, addr, clear)
> +#define setbits_le16(addr, set) setbits(le16, addr, set)
> +#define clrsetbits_le16(addr, clear, set) clrsetbits(le16, addr, clear, set)
> +
> +#define clrbits_8(addr, clear) clrbits(8, addr, clear)
> +#define setbits_8(addr, set) setbits(8, addr, set)
> +#define clrsetbits_8(addr, clear, set) clrsetbits(8, addr, clear, set)
> +
>  #endif /* __ASM_NIOS2_IO_H_ */