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author | 2023-10-10 14:33:42 +0000 | |
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committer | 2023-10-10 14:33:42 +0000 | |
commit | af1a266670d040d2f4083ff309d732d648afba2a (patch) | |
tree | 2fc46203448ddcc6f81546d379abfaeb323575e9 /roms/u-boot/arch/mips/include/asm/mach-generic/mangle-port.h | |
parent | e02cda008591317b1625707ff8e115a4841aa889 (diff) |
Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec
Diffstat (limited to 'roms/u-boot/arch/mips/include/asm/mach-generic/mangle-port.h')
-rw-r--r-- | roms/u-boot/arch/mips/include/asm/mach-generic/mangle-port.h | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/roms/u-boot/arch/mips/include/asm/mach-generic/mangle-port.h b/roms/u-boot/arch/mips/include/asm/mach-generic/mangle-port.h new file mode 100644 index 000000000..3f95bbc88 --- /dev/null +++ b/roms/u-boot/arch/mips/include/asm/mach-generic/mangle-port.h @@ -0,0 +1,49 @@ +/* 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 + +#define __swizzle_addr_b(port) (port) +#define __swizzle_addr_w(port) (port) +#define __swizzle_addr_l(port) (port) +#define __swizzle_addr_q(port) (port) + +/* + * Sane hardware offers swapping of PCI/ISA I/O space accesses in hardware; + * less sane hardware forces software to fiddle with this... + * + * Regardless, if the host bus endianness mismatches that of PCI/ISA, then + * you can't have the numerical value of data and byte addresses within + * multibyte quantities both preserved at the same time. Hence two + * variations of functions: non-prefixed ones that preserve the value + * and prefixed ones that preserve byte addresses. The latters are + * typically used for moving raw data between a peripheral and memory (cf. + * string I/O functions), hence the "__mem_" prefix. + */ +#if defined(CONFIG_SWAP_IO_SPACE) + +# define ioswabb(a, x) (x) +# define __mem_ioswabb(a, x) (x) +# define ioswabw(a, x) le16_to_cpu(x) +# define __mem_ioswabw(a, x) (x) +# define ioswabl(a, x) le32_to_cpu(x) +# define __mem_ioswabl(a, x) (x) +# define ioswabq(a, x) le64_to_cpu(x) +# define __mem_ioswabq(a, x) (x) + +#else + +# define ioswabb(a, x) (x) +# define __mem_ioswabb(a, x) (x) +# define ioswabw(a, x) (x) +# define __mem_ioswabw(a, x) cpu_to_le16(x) +# define ioswabl(a, x) (x) +# define __mem_ioswabl(a, x) cpu_to_le32(x) +# define ioswabq(a, x) (x) +# define __mem_ioswabq(a, x) cpu_to_le32(x) + +#endif + +#endif /* __ASM_MACH_GENERIC_MANGLE_PORT_H */ |