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b28d35234c
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@denx.de>
57 lines
1.5 KiB
C
57 lines
1.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2003, 2004 Ralf Baechle
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*/
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#ifndef __ASM_MACH_GENERIC_MANGLE_PORT_H
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#define __ASM_MACH_GENERIC_MANGLE_PORT_H
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#include <asm/byteorder.h>
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#ifdef __BIG_ENDIAN
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static inline bool __should_swizzle_bits(volatile void *a)
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{
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extern const bool octeon_should_swizzle_table[];
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u64 did = ((u64)(uintptr_t)a >> 40) & 0xff;
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return octeon_should_swizzle_table[did];
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}
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# define __swizzle_addr_b(port) (port)
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# define __swizzle_addr_w(port) (port)
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# define __swizzle_addr_l(port) (port)
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# define __swizzle_addr_q(port) (port)
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#else /* __LITTLE_ENDIAN */
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#define __should_swizzle_bits(a) false
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static inline bool __should_swizzle_addr(u64 p)
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{
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/* boot bus? */
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return ((p >> 40) & 0xff) == 0;
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}
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# define __swizzle_addr_b(port) \
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(__should_swizzle_addr(port) ? (port) ^ 7 : (port))
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# define __swizzle_addr_w(port) \
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(__should_swizzle_addr(port) ? (port) ^ 6 : (port))
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# define __swizzle_addr_l(port) \
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(__should_swizzle_addr(port) ? (port) ^ 4 : (port))
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# define __swizzle_addr_q(port) (port)
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#endif /* __BIG_ENDIAN */
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# define ioswabb(a, x) (x)
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# define __mem_ioswabb(a, x) (x)
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# define ioswabw(a, x) (__should_swizzle_bits(a) ? le16_to_cpu(x) : x)
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# define __mem_ioswabw(a, x) (x)
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# define ioswabl(a, x) (__should_swizzle_bits(a) ? le32_to_cpu(x) : x)
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# define __mem_ioswabl(a, x) (x)
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# define ioswabq(a, x) (__should_swizzle_bits(a) ? le64_to_cpu(x) : x)
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# define __mem_ioswabq(a, x) (x)
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#endif /* __ASM_MACH_GENERIC_MANGLE_PORT_H */
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