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

[Stefan Roese]

On 19.08.20 15:43, Daniel Schwierzeck wrote:
> 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.

Okay. Will change in next version.

Thanks,
Stefan

> 
> /* 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 */


Viele Grüße,
Stefan

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