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authorStuart Menefy <stuart.menefy@st.com>2009-08-24 17:26:39 +0900
committerPaul Mundt <lethal@linux-sh.org>2009-08-24 17:26:39 +0900
commit8af57f8b4c0ada9063b1cee9d81e3e59f04ce5a2 (patch)
tree0a5395049fc234ad9cdbe97641628152afe4c1c7 /arch/sh/kernel
parent7d9c035150897c2bebedae280505513dbdef2abc (diff)
sh: generic_in/outs{bwl} optimizations.
After performing the port2addr conversion, and checking that the data is correctly aligned, simply call __raw_readsX/writesX. These have already been optimised. Signed-off-by: Stuart Menefy <stuart.menefy@st.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/kernel')
-rw-r--r--arch/sh/kernel/io_generic.c50
1 files changed, 8 insertions, 42 deletions
diff --git a/arch/sh/kernel/io_generic.c b/arch/sh/kernel/io_generic.c
index 5a7f554d9ca..4ff50723928 100644
--- a/arch/sh/kernel/io_generic.c
+++ b/arch/sh/kernel/io_generic.c
@@ -73,35 +73,19 @@ u32 generic_inl_p(unsigned long port)
void generic_insb(unsigned long port, void *dst, unsigned long count)
{
- volatile u8 *port_addr;
- u8 *buf = dst;
-
- port_addr = (volatile u8 __force *)__ioport_map(port, 1);
- while (count--)
- *buf++ = *port_addr;
+ __raw_readsb(__ioport_map(port, 1), dst, count);
+ dummy_read();
}
void generic_insw(unsigned long port, void *dst, unsigned long count)
{
- volatile u16 *port_addr;
- u16 *buf = dst;
-
- port_addr = (volatile u16 __force *)__ioport_map(port, 2);
- while (count--)
- *buf++ = *port_addr;
-
+ __raw_readsw(__ioport_map(port, 2), dst, count);
dummy_read();
}
void generic_insl(unsigned long port, void *dst, unsigned long count)
{
- volatile u32 *port_addr;
- u32 *buf = dst;
-
- port_addr = (volatile u32 __force *)__ioport_map(port, 4);
- while (count--)
- *buf++ = *port_addr;
-
+ __raw_readsl(__ioport_map(port, 4), dst, count);
dummy_read();
}
@@ -145,37 +129,19 @@ void generic_outl_p(u32 b, unsigned long port)
*/
void generic_outsb(unsigned long port, const void *src, unsigned long count)
{
- volatile u8 *port_addr;
- const u8 *buf = src;
-
- port_addr = (volatile u8 __force *)__ioport_map(port, 1);
-
- while (count--)
- *port_addr = *buf++;
+ __raw_writesb(__ioport_map(port, 1), src, count);
+ dummy_read();
}
void generic_outsw(unsigned long port, const void *src, unsigned long count)
{
- volatile u16 *port_addr;
- const u16 *buf = src;
-
- port_addr = (volatile u16 __force *)__ioport_map(port, 2);
-
- while (count--)
- *port_addr = *buf++;
-
+ __raw_writesw(__ioport_map(port, 2), src, count);
dummy_read();
}
void generic_outsl(unsigned long port, const void *src, unsigned long count)
{
- volatile u32 *port_addr;
- const u32 *buf = src;
-
- port_addr = (volatile u32 __force *)__ioport_map(port, 4);
- while (count--)
- *port_addr = *buf++;
-
+ __raw_writesl(__ioport_map(port, 4), src, count);
dummy_read();
}