[PATCH v1 5/8] mips: octeon: Add mangle-port.h

[Daniel Schwierzeck]

Am Montag, den 17.08.2020, 15:06 +0200 schrieb Stefan Roese:
> Import platform specific mangle-port.h header, allowing a area specific
> swapping, which is needed on Octeon for USB & PCI areas.
> 
> Imported from Linux v5.7.
> 
> Signed-off-by: Stefan Roese <sr at denx.de>
> ---
> 
>  arch/mips/mach-octeon/include/mangle-port.h | 58 +++++++++++++++++++++
>  1 file changed, 58 insertions(+)
>  create mode 100644 arch/mips/mach-octeon/include/mangle-port.h
> 
> diff --git a/arch/mips/mach-octeon/include/mangle-port.h b/arch/mips/mach-octeon/include/mangle-port.h
> new file mode 100644
> index 0000000000..8ff2cbdf2c
> --- /dev/null
> +++ b/arch/mips/mach-octeon/include/mangle-port.h
> @@ -0,0 +1,58 @@
> +/*
> + * This file is subject to the terms and conditions of the GNU General Public
> + * License.  See the file "COPYING" in the main directory of this archive
> + * for more details.
> + *
> + * Copyright (C) 2003, 2004 Ralf Baechle
> + */

when importing headers from Linux, please remove the license text and
just keep copyrights and optionally additonal info text. At the top
insert the SPDX identifier, e.g.


/* SPDX-License-Identifier: GPL-2.0+ */
/*
 * Copyright (C) 2003, 2004 Ralf Baechle
 */

> +#ifndef __ASM_MACH_GENERIC_MANGLE_PORT_H
> +#define __ASM_MACH_GENERIC_MANGLE_PORT_H
> +
> +#include <asm/byteorder.h>
> +
> +#ifdef __BIG_ENDIAN
> +
> +static inline bool __should_swizzle_bits(volatile void *a)
> +{
> +	extern const bool octeon_should_swizzle_table[];
> +	u64 did = ((u64)(uintptr_t)a >> 40) & 0xff;
> +
> +	return octeon_should_swizzle_table[did];
> +}
> +
> +# define __swizzle_addr_b(port)	(port)
> +# define __swizzle_addr_w(port)	(port)
> +# define __swizzle_addr_l(port)	(port)
> +# define __swizzle_addr_q(port)	(port)
> +
> +#else /* __LITTLE_ENDIAN */
> +
> +#define __should_swizzle_bits(a)	false
> +
> +static inline bool __should_swizzle_addr(u64 p)
> +{
> +	/* boot bus? */
> +	return ((p >> 40) & 0xff) == 0;
> +}
> +
> +# define __swizzle_addr_b(port)	\
> +	(__should_swizzle_addr(port) ? (port) ^ 7 : (port))
> +# define __swizzle_addr_w(port)	\
> +	(__should_swizzle_addr(port) ? (port) ^ 6 : (port))
> +# define __swizzle_addr_l(port)	\
> +	(__should_swizzle_addr(port) ? (port) ^ 4 : (port))
> +# define __swizzle_addr_q(port)	(port)
> +
> +#endif /* __BIG_ENDIAN */
> +
> +
> +# define ioswabb(a, x)		(x)
> +# define __mem_ioswabb(a, x)	(x)
> +# define ioswabw(a, x)		(__should_swizzle_bits(a) ? le16_to_cpu(x) : x)
> +# define __mem_ioswabw(a, x)	(x)
> +# define ioswabl(a, x)		(__should_swizzle_bits(a) ? le32_to_cpu(x) : x)
> +# define __mem_ioswabl(a, x)	(x)
> +# define ioswabq(a, x)		(__should_swizzle_bits(a) ? le64_to_cpu(x) : x)
> +# define __mem_ioswabq(a, x)	(x)
> +
> +#endif /* __ASM_MACH_GENERIC_MANGLE_PORT_H */
-- 
- Daniel