diff options
author | Thomas Bogendoerfer <tbogendoerfer@suse.de> | 2020-01-09 11:34:28 +0100 |
---|---|---|
committer | Paul Burton <paulburton@kernel.org> | 2020-01-09 15:30:56 -0800 |
commit | 10cf8300ecada10f4bd6c9be78439cce98ae6d8b (patch) | |
tree | f7c4812c986b08cfc8e853c6cea57622c26de581 /arch/mips/include/asm/mach-ip27 | |
parent | 2634e5a651e74efc415b2eff37116fcb8206b614 (diff) | |
download | linux-10cf8300ecada10f4bd6c9be78439cce98ae6d8b.tar.gz |
MIPS: SGI-IP27: fix readb/writeb addressing
Our chosen byte swapping, which is what firmware already uses, is to
do readl/writel by normal lw/sw intructions (data invariance). This
also means we need to mangle addresses for u8 and u16 accesses. The
mangling for 16bit has been done aready, but 8bit one was missing.
Correcting this causes different addresses for accesses to the
SuperIO and local bus of the IOC3 chip. This is fixed by changing
byte order in ioc3 and m48rtc_rtc structs.
Acked-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
Signed-off-by: Paul Burton <paulburton@kernel.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: James Hogan <jhogan@kernel.org>
Cc: David S. Miller <davem@davemloft.net>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: linux-mips@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: netdev@vger.kernel.org
Cc: linux-rtc@vger.kernel.org
Diffstat (limited to 'arch/mips/include/asm/mach-ip27')
-rw-r--r-- | arch/mips/include/asm/mach-ip27/mangle-port.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/mips/include/asm/mach-ip27/mangle-port.h b/arch/mips/include/asm/mach-ip27/mangle-port.h index f6e4912ea062..27c56efa519f 100644 --- a/arch/mips/include/asm/mach-ip27/mangle-port.h +++ b/arch/mips/include/asm/mach-ip27/mangle-port.h @@ -8,7 +8,7 @@ #ifndef __ASM_MACH_IP27_MANGLE_PORT_H #define __ASM_MACH_IP27_MANGLE_PORT_H -#define __swizzle_addr_b(port) (port) +#define __swizzle_addr_b(port) ((port) ^ 3) #define __swizzle_addr_w(port) ((port) ^ 2) #define __swizzle_addr_l(port) (port) #define __swizzle_addr_q(port) (port) @@ -20,6 +20,6 @@ # 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) +# define __mem_ioswabq(a, x) cpu_to_le64(x) #endif /* __ASM_MACH_IP27_MANGLE_PORT_H */ |