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MIPS: OCTEON: Add mach-cavium-octeon/mangle-port.h

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Needed for little-endian ioport access.
This fixes NOR flash in little-endian mode

Signed-off-by: David Daney <david.daney@cavium.com>
Signed-off-by: Aleksey Makarov <aleksey.makarov@auriga.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/9591/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
David Daney 2015-03-20 19:11:57 +03:00 committed by Ralf Baechle
parent 534c158ea6
commit e7916357e7
1 changed files with 74 additions and 0 deletions
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arch/mips/include/asm/mach-cavium-octeon/mangle-port.h Normal file
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/*
* 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
# 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 */
static inline bool __should_swizzle_addr(unsigned long 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 */
/*
* 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 */