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#ifndef IO_H
#define IO_H
#define UNCACHED(x) (void *)((x)|(1UL<<63))
#define MF() asm volatile ("mf.a" ::: "memory")
#define IO_SPACE_ENCODING(p) ((((p) >> 2) << 12) | (p & 0xfff))
static inline void *io_addr (unsigned long port)
{
unsigned long offset;
unsigned long io_base;
asm volatile ("mov %0=ar.k0":"=r"(io_base));
offset = IO_SPACE_ENCODING(port);
return UNCACHED(io_base | offset);
}
static inline unsigned int inb (unsigned long port)
{
volatile unsigned char *addr = io_addr(port);
unsigned char ret;
ret = *addr;
MF();
return ret;
}
static inline unsigned int inw (unsigned long port)
{
volatile unsigned short *addr = io_addr(port);
unsigned short ret;
ret = *addr;
MF();
return ret;
}
static inline unsigned int ia64_inl (unsigned long port)
{
volatile unsigned int *addr = __ia64_mk_io_addr(port);
unsigned int ret;
ret = *addr;
MF();
return ret;
}
static inline void outb (unsigned char val, unsigned long port)
{
volatile unsigned char *addr = io_addr(port);
*addr = val;
MF();
}
static inline void outw (unsigned short val, unsigned long port)
{
volatile unsigned short *addr = io_addr(port);
*addr = val;
MF();
}
static inline void outl (unsigned int val, unsigned long port)
{
volatile unsigned int *addr = io_addr(port);
*addr = val;
MF();
}
static inline unsigned char readb(const volatile void *addr)
{
return *(volatile unsigned char *) addr;
}
static inline unsigned short readw(const volatile void *addr)
{
return *(volatile unsigned short *) addr;
}
static inline unsigned int readl(const volatile void *addr)
{
return *(volatile unsigned int *) addr;
}
static inline void writeb(unsigned char b, volatile void *addr)
{
*(volatile unsigned char *) addr = b;
}
static inline void writew(unsigned short b, volatile void *addr)
{
*(volatile unsigned short *) addr = b;
}
static inline void writel(unsigned int b, volatile void *addr)
{
*(volatile unsigned int *) addr = b;
}
#endif
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