realmode.h File Reference

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

Go to the source code of this file.

Macros
#define	put_real(var, dest_seg, dest_off)
	Write a single variable to base memory.
#define	get_real(var, src_seg, src_off)
	Read a single variable from base memory.

Functions
	FILE_LICENCE (GPL2_OR_LATER_OR_UBDL)
static __always_inline void *	real_to_virt (unsigned int segment, unsigned int offset)
	Convert segment:offset address to virtual address.
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.

Macro Definition Documentation

put_real

#define put_real	(		var,
			dest_seg,
			dest_off )

Value:

        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 116 of file realmode.h.

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

get_real

#define get_real	(		var,
			src_seg,
			src_off )

Value:

        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 126 of file realmode.h.

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

Function Documentation

FILE_LICENCE()

FILE_LICENCE

(

GPL2_OR_LATER_OR_UBDL

)

References __always_inline.

real_to_virt()

__always_inline void * real_to_virt ( unsigned int segment, unsigned int offset )

inlinestatic

Convert segment:offset address to virtual address.

Parameters

segment	Real-mode segment
offset	Real-mode offset

Return values

virt	Virtual address

Definition at line 77 of file realmode.h.

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

References offset, 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_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_from_rm_stack(), rsdp_find_rsdt(), sdi_exec(), shuffle(), vesafb_font(), and vesafb_mode_list().

copy_to_real()

__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 90 of file realmode.h.

                                     {
        memcpy ( real_to_virt ( dest_seg, dest_off ), src, n );
}

References memcpy(), real_to_virt(), and src.

copy_from_real()

__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 104 of file realmode.h.

                                                  {
        memcpy ( dest, real_to_virt ( src_seg, src_off ), n );
}

References dest, memcpy(), and real_to_virt().