epicsMMIODef.h File Reference

Memory Mapped I/O. More...

#include <epicsTypes.h>
#include <epicsEndian.h>
#include <compilerSpecific.h>
#include <libComAPI.h>

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Macros
#define	rbarr()   do{}while(0)
	Explicit read memory barrier Prevents reordering of reads around it. More...
#define	wbarr()   do{}while(0)
	Explicit write memory barrier Prevents reordering of writes around it. More...
#define	rwbarr()   do{}while(0)
	Explicit read/write memory barrier Prevents reordering of reads or writes around it. More...
#define	be_ioread16(A)   nat_ioread16(A)
	Read two byte in big endian order. More...
#define	be_ioread32(A)   nat_ioread32(A)
	Read four byte in big endian order. More...
#define	be_iowrite16(A, D)   nat_iowrite16(A,D)
	Write two byte in big endian order. More...
#define	be_iowrite32(A, D)   nat_iowrite32(A,D)
	Write four byte in big endian order. More...
#define	le_ioread16(A)   bswap16(nat_ioread16(A))
	Read two byte in little endian order. More...
#define	le_ioread32(A)   bswap32(nat_ioread32(A))
	Read four byte in little endian order. More...
#define	le_iowrite16(A, D)   nat_iowrite16(A,bswap16(D))
	Write two byte in little endian order. More...
#define	le_iowrite32(A, D)   nat_iowrite32(A,bswap32(D))
	Write four byte in little endian order. More...

Detailed Description

Memory Mapped I/O.

Definitions related to Memory Mapped I/O

Author

Michael Davidsaver mdavi.nosp@m.dsav.nosp@m.er@bn.nosp@m.l.go.nosp@m.v

Definition in file epicsMMIODef.h.

Macro Definition Documentation

#define be_ioread16

(

A

)

nat_ioread16(A)

Read two byte in big endian order.

#define be_ioread32

(

A

)

nat_ioread32(A)

Read four byte in big endian order.

#define be_iowrite16	(		A,
			D
	)		nat_iowrite16(A,D)

Write two byte in big endian order.

#define be_iowrite32	(		A,
			D
	)		nat_iowrite32(A,D)

Write four byte in big endian order.

#define le_ioread16

(

A

)

bswap16(nat_ioread16(A))

Read two byte in little endian order.

#define le_ioread32

(

A

)

bswap32(nat_ioread32(A))

Read four byte in little endian order.

#define le_iowrite16	(		A,
			D
	)		nat_iowrite16(A,bswap16(D))

Write two byte in little endian order.

#define le_iowrite32	(		A,
			D
	)		nat_iowrite32(A,bswap32(D))

Write four byte in little endian order.