mirror of https://github.com/ipxe/ipxe.git
65 lines
2.3 KiB
C
65 lines
2.3 KiB
C
#ifndef _IPXE_DUMMY_PIO_H
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#define _IPXE_DUMMY_PIO_H
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/** @file
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*
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* Dummy PIO reads and writes up to 32 bits
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*
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* There is no common standard for I/O-space access for non-x86 CPU
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* families, and non-MMIO peripherals are vanishingly rare. Provide
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* dummy implementations that will allow code to link and should cause
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* drivers to simply fail to detect hardware at runtime.
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*/
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FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
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#define DUMMY_INX( _prefix, _suffix, _type ) \
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static inline __always_inline _type \
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IOAPI_INLINE ( _prefix, in ## _suffix ) ( volatile _type *io_addr __unused) { \
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return ~( (_type) 0 ); \
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} \
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static inline __always_inline void \
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IOAPI_INLINE ( _prefix, ins ## _suffix ) ( volatile _type *io_addr __unused, \
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_type *data, unsigned int count ) {\
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memset ( data, 0xff, count * sizeof ( *data ) ); \
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}
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#define DUMMY_OUTX( _prefix, _suffix, _type ) \
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static inline __always_inline void \
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IOAPI_INLINE ( _prefix, out ## _suffix ) ( _type data __unused, \
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volatile _type *io_addr __unused ){\
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/* Do nothing */ \
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} \
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static inline __always_inline void \
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IOAPI_INLINE ( _prefix, outs ## _suffix ) ( volatile _type *io_addr __unused, \
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const _type *data __unused, \
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unsigned int count __unused ) { \
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/* Do nothing */ \
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}
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#define DUMMY_IODELAY( _prefix ) \
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static inline __always_inline void \
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IOAPI_INLINE ( _prefix, iodelay ) ( void ) { \
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/* Nothing to do */ \
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}
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#define DUMMY_PIO( _prefix ) \
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DUMMY_INX ( _prefix, b, uint8_t ); \
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DUMMY_INX ( _prefix, w, uint16_t ); \
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DUMMY_INX ( _prefix, l, uint32_t ); \
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DUMMY_OUTX ( _prefix, b, uint8_t ); \
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DUMMY_OUTX ( _prefix, w, uint16_t ); \
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DUMMY_OUTX ( _prefix, l, uint32_t ); \
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DUMMY_IODELAY ( _prefix );
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#define PROVIDE_DUMMY_PIO( _prefix ) \
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PROVIDE_IOAPI_INLINE ( _prefix, inb ); \
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PROVIDE_IOAPI_INLINE ( _prefix, inw ); \
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PROVIDE_IOAPI_INLINE ( _prefix, inl ); \
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PROVIDE_IOAPI_INLINE ( _prefix, outb ); \
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PROVIDE_IOAPI_INLINE ( _prefix, outw ); \
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PROVIDE_IOAPI_INLINE ( _prefix, outl ); \
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PROVIDE_IOAPI_INLINE ( _prefix, iodelay );
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#endif /* _IPXE_DUMMY_PIO_H */
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