mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-15 23:14:31 +08:00
ce816fa88c
If the renamed symbol is defined lib/iomap.c implements ioport_map and ioport_unmap and currently (nearly) all platforms define the port accessor functions outb/inb and friend unconditionally. So HAS_IOPORT_MAP is the better name for this. Consequently NO_IOPORT is renamed to NO_IOPORT_MAP. The motivation for this change is to reintroduce a symbol HAS_IOPORT that signals if outb/int et al are available. I will address that at least one merge window later though to keep surprises to a minimum and catch new introductions of (HAS|NO)_IOPORT. The changes in this commit were done using: $ git grep -l -E '(NO|HAS)_IOPORT' | xargs perl -p -i -e 's/\b((?:CONFIG_)?(?:NO|HAS)_IOPORT)\b/$1_MAP/' Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
253 lines
6.5 KiB
C
253 lines
6.5 KiB
C
/*
|
|
* Implement the default iomap interfaces
|
|
*
|
|
* (C) Copyright 2004 Linus Torvalds
|
|
*/
|
|
#include <linux/pci.h>
|
|
#include <linux/io.h>
|
|
|
|
#include <linux/export.h>
|
|
|
|
/*
|
|
* Read/write from/to an (offsettable) iomem cookie. It might be a PIO
|
|
* access or a MMIO access, these functions don't care. The info is
|
|
* encoded in the hardware mapping set up by the mapping functions
|
|
* (or the cookie itself, depending on implementation and hw).
|
|
*
|
|
* The generic routines don't assume any hardware mappings, and just
|
|
* encode the PIO/MMIO as part of the cookie. They coldly assume that
|
|
* the MMIO IO mappings are not in the low address range.
|
|
*
|
|
* Architectures for which this is not true can't use this generic
|
|
* implementation and should do their own copy.
|
|
*/
|
|
|
|
#ifndef HAVE_ARCH_PIO_SIZE
|
|
/*
|
|
* We encode the physical PIO addresses (0-0xffff) into the
|
|
* pointer by offsetting them with a constant (0x10000) and
|
|
* assuming that all the low addresses are always PIO. That means
|
|
* we can do some sanity checks on the low bits, and don't
|
|
* need to just take things for granted.
|
|
*/
|
|
#define PIO_OFFSET 0x10000UL
|
|
#define PIO_MASK 0x0ffffUL
|
|
#define PIO_RESERVED 0x40000UL
|
|
#endif
|
|
|
|
static void bad_io_access(unsigned long port, const char *access)
|
|
{
|
|
static int count = 10;
|
|
if (count) {
|
|
count--;
|
|
WARN(1, KERN_ERR "Bad IO access at port %#lx (%s)\n", port, access);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Ugly macros are a way of life.
|
|
*/
|
|
#define IO_COND(addr, is_pio, is_mmio) do { \
|
|
unsigned long port = (unsigned long __force)addr; \
|
|
if (port >= PIO_RESERVED) { \
|
|
is_mmio; \
|
|
} else if (port > PIO_OFFSET) { \
|
|
port &= PIO_MASK; \
|
|
is_pio; \
|
|
} else \
|
|
bad_io_access(port, #is_pio ); \
|
|
} while (0)
|
|
|
|
#ifndef pio_read16be
|
|
#define pio_read16be(port) swab16(inw(port))
|
|
#define pio_read32be(port) swab32(inl(port))
|
|
#endif
|
|
|
|
#ifndef mmio_read16be
|
|
#define mmio_read16be(addr) be16_to_cpu(__raw_readw(addr))
|
|
#define mmio_read32be(addr) be32_to_cpu(__raw_readl(addr))
|
|
#endif
|
|
|
|
unsigned int ioread8(void __iomem *addr)
|
|
{
|
|
IO_COND(addr, return inb(port), return readb(addr));
|
|
return 0xff;
|
|
}
|
|
unsigned int ioread16(void __iomem *addr)
|
|
{
|
|
IO_COND(addr, return inw(port), return readw(addr));
|
|
return 0xffff;
|
|
}
|
|
unsigned int ioread16be(void __iomem *addr)
|
|
{
|
|
IO_COND(addr, return pio_read16be(port), return mmio_read16be(addr));
|
|
return 0xffff;
|
|
}
|
|
unsigned int ioread32(void __iomem *addr)
|
|
{
|
|
IO_COND(addr, return inl(port), return readl(addr));
|
|
return 0xffffffff;
|
|
}
|
|
unsigned int ioread32be(void __iomem *addr)
|
|
{
|
|
IO_COND(addr, return pio_read32be(port), return mmio_read32be(addr));
|
|
return 0xffffffff;
|
|
}
|
|
EXPORT_SYMBOL(ioread8);
|
|
EXPORT_SYMBOL(ioread16);
|
|
EXPORT_SYMBOL(ioread16be);
|
|
EXPORT_SYMBOL(ioread32);
|
|
EXPORT_SYMBOL(ioread32be);
|
|
|
|
#ifndef pio_write16be
|
|
#define pio_write16be(val,port) outw(swab16(val),port)
|
|
#define pio_write32be(val,port) outl(swab32(val),port)
|
|
#endif
|
|
|
|
#ifndef mmio_write16be
|
|
#define mmio_write16be(val,port) __raw_writew(be16_to_cpu(val),port)
|
|
#define mmio_write32be(val,port) __raw_writel(be32_to_cpu(val),port)
|
|
#endif
|
|
|
|
void iowrite8(u8 val, void __iomem *addr)
|
|
{
|
|
IO_COND(addr, outb(val,port), writeb(val, addr));
|
|
}
|
|
void iowrite16(u16 val, void __iomem *addr)
|
|
{
|
|
IO_COND(addr, outw(val,port), writew(val, addr));
|
|
}
|
|
void iowrite16be(u16 val, void __iomem *addr)
|
|
{
|
|
IO_COND(addr, pio_write16be(val,port), mmio_write16be(val, addr));
|
|
}
|
|
void iowrite32(u32 val, void __iomem *addr)
|
|
{
|
|
IO_COND(addr, outl(val,port), writel(val, addr));
|
|
}
|
|
void iowrite32be(u32 val, void __iomem *addr)
|
|
{
|
|
IO_COND(addr, pio_write32be(val,port), mmio_write32be(val, addr));
|
|
}
|
|
EXPORT_SYMBOL(iowrite8);
|
|
EXPORT_SYMBOL(iowrite16);
|
|
EXPORT_SYMBOL(iowrite16be);
|
|
EXPORT_SYMBOL(iowrite32);
|
|
EXPORT_SYMBOL(iowrite32be);
|
|
|
|
/*
|
|
* These are the "repeat MMIO read/write" functions.
|
|
* Note the "__raw" accesses, since we don't want to
|
|
* convert to CPU byte order. We write in "IO byte
|
|
* order" (we also don't have IO barriers).
|
|
*/
|
|
#ifndef mmio_insb
|
|
static inline void mmio_insb(void __iomem *addr, u8 *dst, int count)
|
|
{
|
|
while (--count >= 0) {
|
|
u8 data = __raw_readb(addr);
|
|
*dst = data;
|
|
dst++;
|
|
}
|
|
}
|
|
static inline void mmio_insw(void __iomem *addr, u16 *dst, int count)
|
|
{
|
|
while (--count >= 0) {
|
|
u16 data = __raw_readw(addr);
|
|
*dst = data;
|
|
dst++;
|
|
}
|
|
}
|
|
static inline void mmio_insl(void __iomem *addr, u32 *dst, int count)
|
|
{
|
|
while (--count >= 0) {
|
|
u32 data = __raw_readl(addr);
|
|
*dst = data;
|
|
dst++;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
#ifndef mmio_outsb
|
|
static inline void mmio_outsb(void __iomem *addr, const u8 *src, int count)
|
|
{
|
|
while (--count >= 0) {
|
|
__raw_writeb(*src, addr);
|
|
src++;
|
|
}
|
|
}
|
|
static inline void mmio_outsw(void __iomem *addr, const u16 *src, int count)
|
|
{
|
|
while (--count >= 0) {
|
|
__raw_writew(*src, addr);
|
|
src++;
|
|
}
|
|
}
|
|
static inline void mmio_outsl(void __iomem *addr, const u32 *src, int count)
|
|
{
|
|
while (--count >= 0) {
|
|
__raw_writel(*src, addr);
|
|
src++;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
void ioread8_rep(void __iomem *addr, void *dst, unsigned long count)
|
|
{
|
|
IO_COND(addr, insb(port,dst,count), mmio_insb(addr, dst, count));
|
|
}
|
|
void ioread16_rep(void __iomem *addr, void *dst, unsigned long count)
|
|
{
|
|
IO_COND(addr, insw(port,dst,count), mmio_insw(addr, dst, count));
|
|
}
|
|
void ioread32_rep(void __iomem *addr, void *dst, unsigned long count)
|
|
{
|
|
IO_COND(addr, insl(port,dst,count), mmio_insl(addr, dst, count));
|
|
}
|
|
EXPORT_SYMBOL(ioread8_rep);
|
|
EXPORT_SYMBOL(ioread16_rep);
|
|
EXPORT_SYMBOL(ioread32_rep);
|
|
|
|
void iowrite8_rep(void __iomem *addr, const void *src, unsigned long count)
|
|
{
|
|
IO_COND(addr, outsb(port, src, count), mmio_outsb(addr, src, count));
|
|
}
|
|
void iowrite16_rep(void __iomem *addr, const void *src, unsigned long count)
|
|
{
|
|
IO_COND(addr, outsw(port, src, count), mmio_outsw(addr, src, count));
|
|
}
|
|
void iowrite32_rep(void __iomem *addr, const void *src, unsigned long count)
|
|
{
|
|
IO_COND(addr, outsl(port, src,count), mmio_outsl(addr, src, count));
|
|
}
|
|
EXPORT_SYMBOL(iowrite8_rep);
|
|
EXPORT_SYMBOL(iowrite16_rep);
|
|
EXPORT_SYMBOL(iowrite32_rep);
|
|
|
|
#ifdef CONFIG_HAS_IOPORT_MAP
|
|
/* Create a virtual mapping cookie for an IO port range */
|
|
void __iomem *ioport_map(unsigned long port, unsigned int nr)
|
|
{
|
|
if (port > PIO_MASK)
|
|
return NULL;
|
|
return (void __iomem *) (unsigned long) (port + PIO_OFFSET);
|
|
}
|
|
|
|
void ioport_unmap(void __iomem *addr)
|
|
{
|
|
/* Nothing to do */
|
|
}
|
|
EXPORT_SYMBOL(ioport_map);
|
|
EXPORT_SYMBOL(ioport_unmap);
|
|
#endif /* CONFIG_HAS_IOPORT_MAP */
|
|
|
|
#ifdef CONFIG_PCI
|
|
/* Hide the details if this is a MMIO or PIO address space and just do what
|
|
* you expect in the correct way. */
|
|
void pci_iounmap(struct pci_dev *dev, void __iomem * addr)
|
|
{
|
|
IO_COND(addr, /* nothing */, iounmap(addr));
|
|
}
|
|
EXPORT_SYMBOL(pci_iounmap);
|
|
#endif /* CONFIG_PCI */
|