minix/lib/libsys/sys_physcopy.c

   1 #include "syslib.h"
   2
   3 int sys_physcopy(src_proc, src_vir, dst_proc, dst_vir, bytes, flags)
   4 endpoint_t src_proc;            /* source process */
   5 vir_bytes src_vir;              /* source virtual address */
   6 endpoint_t dst_proc;            /* destination process */
   7 vir_bytes dst_vir;              /* destination virtual address */
   8 phys_bytes bytes;               /* how many bytes */
   9 int flags;                      /* copy flags */
  10 {
  11 /* Transfer a block of data.  The source and destination can each either be a
  12  * process number or SELF (to indicate own process number). Virtual addresses
  13  * are offsets within LOCAL_SEG (text, stack, data), or BIOS_SEG.
  14  * Physicall addressing is also possible with PHYS_SEG.
  15  */
  16
  17   message copy_mess;
  18
  19   if (bytes == 0L) return(OK);
  20   copy_mess.m_lsys_krn_sys_copy.src_endpt = src_proc;
  21   copy_mess.m_lsys_krn_sys_copy.src_addr = src_vir;
  22   copy_mess.m_lsys_krn_sys_copy.dst_endpt = dst_proc;
  23   copy_mess.m_lsys_krn_sys_copy.dst_addr = dst_vir;
  24   copy_mess.m_lsys_krn_sys_copy.nr_bytes = bytes;
  25   copy_mess.m_lsys_krn_sys_copy.flags = flags;
  26
  27   return(_kernel_call(SYS_PHYSCOPY, &copy_mess));
  28 }