realmode.h File Reference

#include <stdint.h>
#include <registers.h>
#include <gpxe/uaccess.h>

Go to the source code of this file.

Defines
#define	put_real(var, dest_seg, dest_off)   copy_to_real ( (dest_seg), (dest_off), &(var), sizeof (var) )
	Write a single variable to base memory.
#define	get_real(var, src_seg, src_off)   copy_from_real ( &(var), (src_seg), (src_off), sizeof (var) )
	Read a single variable from base memory.
Functions
	FILE_LICENCE (GPL2_OR_LATER)
static __always_inline void	copy_to_real (unsigned int dest_seg, unsigned int dest_off, void *src, size_t n)
	Copy data to base memory.
static __always_inline void	copy_from_real (void *dest, unsigned int src_seg, unsigned int src_off, size_t n)
	Copy data to base memory.

---

Define Documentation

#define put_real	(	var,
		dest_seg,
		dest_off		)	copy_to_real ( (dest_seg), (dest_off), &(var), sizeof (var) )

Write a single variable to base memory.

Parameters:

	var	Variable to write
	dest_seg	Destination segment
	dest_off	Destination offset

Definition at line 102 of file realmode.h.

#define get_real	(	var,
		src_seg,
		src_off		)	copy_from_real ( &(var), (src_seg), (src_off), sizeof (var) )

Read a single variable from base memory.

Parameters:

	var	Variable to read
	src_seg	Source segment
	src_off	Source offset

Definition at line 112 of file realmode.h.

---

Function Documentation

FILE_LICENCE

(

GPL2_OR_LATER

)

static __always_inline void copy_to_real	(	unsigned int	dest_seg,
		unsigned int	dest_off,
		void *	src,
		size_t	n
	)			[inline, static]

Copy data to base memory.

Parameters:

	dest_seg	Destination segment
	dest_off	Destination offset
	src	Source
	len	Length

Definition at line 76 of file realmode.h.

References copy_to_user(), and real_to_user().

                                     {
        copy_to_user ( real_to_user ( dest_seg, dest_off ), 0, src, n );
}

static __always_inline void copy_from_real	(	void *	dest,
		unsigned int	src_seg,
		unsigned int	src_off,
		size_t	n
	)			[inline, static]

Copy data to base memory.

Parameters:

	dest	Destination
	src_seg	Source segment
	src_off	Source offset
	len	Length

Definition at line 90 of file realmode.h.

References copy_from_user(), and real_to_user().

                                                  {
        copy_from_user ( dest, real_to_user ( src_seg, src_off ), 0, n );
}