realmode.h File Reference

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

Go to the source code of this file.

Macros
#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. More...
#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. More...

Functions
	FILE_LICENCE (GPL2_OR_LATER_OR_UBDL)
static __always_inline userptr_t	real_to_user (unsigned int segment, unsigned int offset)
	Convert segment:offset address to user buffer. More...
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. More...
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. More...

Macro Definition Documentation

put_real

#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 114 of file realmode.h.

get_real

#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 124 of file realmode.h.

Function Documentation

FILE_LICENCE()

FILE_LICENCE

(

GPL2_OR_LATER_OR_UBDL

)

real_to_user()

static __always_inline userptr_t real_to_user ( unsigned int  segment, unsigned int  offset  )

inlinestatic

Convert segment:offset address to user buffer.

Parameters

segment	Real-mode segment
offset	Real-mode offset

Return values

buffer

User buffer

Definition at line 75 of file realmode.h.

                                                           {
        return ( phys_to_user ( ( segment << 4 ) + offset ) );
}

References offset, phys_to_user(), and segment.

Referenced by bios_find_smbios2(), bios_find_smbios3(), bzimage_parse_header(), com32_prepare_bounce_buffer(), comboot_exec_loop(), comboot_prepare_segment(), copy_from_real(), copy_to_real(), copy_user_to_rm_stack(), int13_extended_rw(), int13_rw_sectors(), int22(), nbi_process_segments(), print_user_string(), pxe_api_call(), pxe_exec(), pxe_loader_call(), pxenv_file_cmdline(), pxenv_file_exec(), pxenv_file_open(), pxenv_file_read(), pxenv_get_cached_info(), pxenv_tftp_read(), pxenv_udp_read(), pxenv_udp_write(), remove_user_from_rm_stack(), rsdp_find_rsdt(), sdi_exec(), shuffle(), and vesafb_mode_list().

copy_to_real()

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

inlinestatic

Copy data to base memory.

Parameters

dest_seg	Destination segment
dest_off	Destination offset
src	Source
len	Length

Definition at line 88 of file realmode.h.

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

References copy_to_user(), dest_off, real_to_user(), and src.

copy_from_real()

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

inlinestatic

Copy data to base memory.

Parameters

dest	Destination
src_seg	Source segment
src_off	Source offset
len	Length

Definition at line 102 of file realmode.h.

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

References copy_from_user(), dest, real_to_user(), and src_off.