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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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14866543ad
This tidies up a lot of the PIO/MMIO split. No in-tree platforms were making use of the MMIO overloading through the machvec (nor have any of them been in some time), so we just kill all of that off. The ISA I/O routine wrapping remains unaffected, which remains the only special casing outside of the iomap API that boards need to think about. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
190 lines
3.7 KiB
C
190 lines
3.7 KiB
C
/*
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* arch/sh/kernel/io_generic.c
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*
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* Copyright (C) 2000 Niibe Yutaka
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* Copyright (C) 2005 - 2007 Paul Mundt
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*
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* Generic I/O routine. These can be used where a machine specific version
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* is not required.
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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#include <linux/module.h>
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#include <linux/io.h>
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#include <asm/machvec.h>
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#ifdef CONFIG_CPU_SH3
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/* SH3 has a PCMCIA bug that needs a dummy read from area 6 for a
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* workaround. */
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/* I'm not sure SH7709 has this kind of bug */
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#define dummy_read() __raw_readb(0xba000000)
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#else
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#define dummy_read()
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#endif
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unsigned long generic_io_base;
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u8 generic_inb(unsigned long port)
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{
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return __raw_readb(__ioport_map(port, 1));
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}
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u16 generic_inw(unsigned long port)
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{
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return __raw_readw(__ioport_map(port, 2));
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}
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u32 generic_inl(unsigned long port)
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{
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return __raw_readl(__ioport_map(port, 4));
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}
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u8 generic_inb_p(unsigned long port)
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{
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unsigned long v = generic_inb(port);
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ctrl_delay();
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return v;
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}
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u16 generic_inw_p(unsigned long port)
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{
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unsigned long v = generic_inw(port);
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ctrl_delay();
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return v;
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}
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u32 generic_inl_p(unsigned long port)
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{
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unsigned long v = generic_inl(port);
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ctrl_delay();
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return v;
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}
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/*
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* insb/w/l all read a series of bytes/words/longs from a fixed port
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* address. However as the port address doesn't change we only need to
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* convert the port address to real address once.
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*/
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void generic_insb(unsigned long port, void *dst, unsigned long count)
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{
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volatile u8 *port_addr;
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u8 *buf = dst;
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port_addr = (volatile u8 __force *)__ioport_map(port, 1);
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while (count--)
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*buf++ = *port_addr;
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}
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void generic_insw(unsigned long port, void *dst, unsigned long count)
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{
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volatile u16 *port_addr;
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u16 *buf = dst;
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port_addr = (volatile u16 __force *)__ioport_map(port, 2);
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while (count--)
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*buf++ = *port_addr;
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dummy_read();
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}
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void generic_insl(unsigned long port, void *dst, unsigned long count)
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{
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volatile u32 *port_addr;
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u32 *buf = dst;
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port_addr = (volatile u32 __force *)__ioport_map(port, 4);
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while (count--)
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*buf++ = *port_addr;
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dummy_read();
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}
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void generic_outb(u8 b, unsigned long port)
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{
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__raw_writeb(b, __ioport_map(port, 1));
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}
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void generic_outw(u16 b, unsigned long port)
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{
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__raw_writew(b, __ioport_map(port, 2));
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}
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void generic_outl(u32 b, unsigned long port)
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{
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__raw_writel(b, __ioport_map(port, 4));
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}
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void generic_outb_p(u8 b, unsigned long port)
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{
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generic_outb(b, port);
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ctrl_delay();
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}
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void generic_outw_p(u16 b, unsigned long port)
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{
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generic_outw(b, port);
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ctrl_delay();
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}
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void generic_outl_p(u32 b, unsigned long port)
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{
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generic_outl(b, port);
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ctrl_delay();
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}
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/*
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* outsb/w/l all write a series of bytes/words/longs to a fixed port
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* address. However as the port address doesn't change we only need to
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* convert the port address to real address once.
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*/
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void generic_outsb(unsigned long port, const void *src, unsigned long count)
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{
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volatile u8 *port_addr;
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const u8 *buf = src;
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port_addr = (volatile u8 __force *)__ioport_map(port, 1);
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while (count--)
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*port_addr = *buf++;
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}
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void generic_outsw(unsigned long port, const void *src, unsigned long count)
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{
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volatile u16 *port_addr;
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const u16 *buf = src;
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port_addr = (volatile u16 __force *)__ioport_map(port, 2);
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while (count--)
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*port_addr = *buf++;
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dummy_read();
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}
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void generic_outsl(unsigned long port, const void *src, unsigned long count)
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{
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volatile u32 *port_addr;
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const u32 *buf = src;
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port_addr = (volatile u32 __force *)__ioport_map(port, 4);
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while (count--)
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*port_addr = *buf++;
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dummy_read();
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}
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void __iomem *generic_ioport_map(unsigned long addr, unsigned int size)
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{
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return (void __iomem *)(addr + generic_io_base);
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}
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void generic_ioport_unmap(void __iomem *addr)
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{
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}
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