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46 lines
1.4 KiB
46 lines
1.4 KiB
/* SPDX-License-Identifier: GPL-2.0 |
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* |
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* SH version cribbed from the MIPS copy: |
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* |
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* Copyright (C) 2003, 2004 Ralf Baechle |
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*/ |
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#ifndef __MACH_COMMON_MANGLE_PORT_H |
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#define __MACH_COMMON_MANGLE_PORT_H |
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/* |
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* Sane hardware offers swapping of PCI/ISA I/O space accesses in hardware; |
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* less sane hardware forces software to fiddle with this... |
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* |
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* Regardless, if the host bus endianness mismatches that of PCI/ISA, then |
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* you can't have the numerical value of data and byte addresses within |
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* multibyte quantities both preserved at the same time. Hence two |
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* variations of functions: non-prefixed ones that preserve the value |
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* and prefixed ones that preserve byte addresses. The latters are |
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* typically used for moving raw data between a peripheral and memory (cf. |
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* string I/O functions), hence the "__mem_" prefix. |
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*/ |
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#if defined(CONFIG_SWAP_IO_SPACE) |
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# define ioswabb(x) (x) |
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# define __mem_ioswabb(x) (x) |
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# define ioswabw(x) le16_to_cpu(x) |
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# define __mem_ioswabw(x) (x) |
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# define ioswabl(x) le32_to_cpu(x) |
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# define __mem_ioswabl(x) (x) |
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# define ioswabq(x) le64_to_cpu(x) |
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# define __mem_ioswabq(x) (x) |
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#else |
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# define ioswabb(x) (x) |
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# define __mem_ioswabb(x) (x) |
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# define ioswabw(x) (x) |
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# define __mem_ioswabw(x) cpu_to_le16(x) |
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# define ioswabl(x) (x) |
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# define __mem_ioswabl(x) cpu_to_le32(x) |
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# define ioswabq(x) (x) |
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# define __mem_ioswabq(x) cpu_to_le32(x) |
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#endif |
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#endif /* __MACH_COMMON_MANGLE_PORT_H */
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