hal_io.h

ucos 在arca方舟芯片（mips）上的移植。

//=============================================================================
//
//      hal_io.h
 
//-----------------------------------------------------------------------------
// BYTE Register access.
// Individual and vectorized access to 8 bit registers.
#define REG32(addr)      (*((unsigned int  volatile *)(addr)))
#define REG16(addr)      (*((unsigned short volatile *)(addr)))
#define REG8(addr)       (*((unsigned char  volatile *)(addr)))

#define inb(_register_) *((volatile unsigned char *)(_register_))

#define outb(_register_, _value_)				\
do {								\
   (*((volatile unsigned char *)(_register_)) = (_value_));	\
}while(0)

//-----------------------------------------------------------------------------
// 16 bit access.
// Individual and vectorized access to 16 bit registers.
#define inw(_register_) *((volatile unsigned short *)(_register_))

#define outw(_register_, _value_)				\
do {								\
   (*((volatile unsigned short *)(_register_)) = (_value_));	\
}while(0)

//-----------------------------------------------------------------------------
// 32 bit access.
// Individual and vectorized access to 32 bit registers.
#define inl(_register_) *((volatile unsigned int *)(_register_))

#define outl(_register_, _value_)				\
do {								\
   (*((volatile unsigned int *)(_register_)) = (_value_));	\
}while(0)
    
//-----------------------------------------------------------------------------
// End of hal_io.h