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Commit 8af57f8b authored by Stuart Menefy's avatar Stuart Menefy Committed by Paul Mundt
Browse files

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: default avatarStuart Menefy <stuart.menefy@st.com>
Signed-off-by: default avatarPaul Mundt <lethal@linux-sh.org>
parent 7d9c0351

arch/sh/kernel/io_generic.c

+8 −42
Original line number Diff line number Diff line
@@ -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();

}