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 ---
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 + */ +#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 */