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>
diff --git a/arch/sh/kernel/io_generic.c b/arch/sh/kernel/io_generic.c
index 5a7f554..4ff5072 100644
--- a/arch/sh/kernel/io_generic.c
+++ b/arch/sh/kernel/io_generic.c
@@ -73,35 +73,19 @@
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_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();
}