minix/kernel/arch/i386/do_readbios.c
Ben Gras c078ec0331 Basic VM and other minor improvements.
Not complete, probably not fully debugged or optimized.
2008-11-19 12:26:10 +00:00

29 lines
901 B
C

/* The kernel call implemented in this file:
* m_type: SYS_READBIOS
*
* The parameters for this kernel call are:
* m2_i1: RDB_SIZE number of bytes to copy
* m2_l1: RDB_ADDR absolute address in BIOS area
* m2_p1: RDB_BUF buffer address in requesting process
*/
#include "../../system.h"
#include <minix/type.h>
/*===========================================================================*
* do_readbios *
*===========================================================================*/
PUBLIC int do_readbios(m_ptr)
register message *m_ptr; /* pointer to request message */
{
struct vir_addr src, dst;
src.segment = BIOS_SEG;
dst.segment = D;
src.offset = m_ptr->RDB_ADDR;
dst.offset = (vir_bytes) m_ptr->RDB_BUF;
src.proc_nr_e = NONE;
dst.proc_nr_e = m_ptr->m_source;
return virtual_copy_vmcheck(&src, &dst, m_ptr->RDB_SIZE);
}