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52 lines
1.8 KiB
52 lines
1.8 KiB
/* |
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* This file is subject to the terms and conditions of the GNU General Public |
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* License. See the file "COPYING" in the main directory of this archive |
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* for more details. |
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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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#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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/* |
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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(a, x) (x) |
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# define __mem_ioswabb(a, x) (x) |
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# define ioswabw(a, x) le16_to_cpu((__force __le16)(x)) |
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# define __mem_ioswabw(a, x) (x) |
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# define ioswabl(a, x) le32_to_cpu((__force __le32)(x)) |
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# define __mem_ioswabl(a, x) (x) |
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# define ioswabq(a, x) le64_to_cpu((__force __le64)(x)) |
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# define __mem_ioswabq(a, x) (x) |
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#else |
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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) (x) |
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# define __mem_ioswabw(a, x) ((__force u16)cpu_to_le16(x)) |
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# define ioswabl(a, x) (x) |
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# define __mem_ioswabl(a, x) ((__force u32)cpu_to_le32(x)) |
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# define ioswabq(a, x) (x) |
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# define __mem_ioswabq(a, x) ((__force u64)cpu_to_le64(x)) |
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#endif |
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#endif /* __ASM_MACH_GENERIC_MANGLE_PORT_H */
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