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 <[email protected]>
> ---
>
> 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
