kernel/system/do_memset.c

   1 /* The kernel call implemented in this file:
   2  *   m_type:    SYS_MEMSET
   3  *
   4  * The parameters for this kernel call are:
   5  *    m2_p1:    MEM_PTR         (virtual address)
   6  *    m2_l1:    MEM_COUNT       (returns physical address)
   7  *    m2_l2:    MEM_PATTERN     (size of datastructure)
   8  */
   9
  10 #include "../system.h"
  11
  12 #if USE_MEMSET
  13
  14 /*===========================================================================*
  15  *                              do_memset                                    *
  16  *===========================================================================*/
  17 PUBLIC int do_memset(m_ptr)
  18 register message *m_ptr;
  19 {
  20 /* Handle sys_memset(). This writes a pattern into the specified memory. */
  21   unsigned long p;
  22   unsigned char c = m_ptr->MEM_PATTERN;
  23   p = c | (c << 8) | (c << 16) | (c << 24);
  24   phys_memset((phys_bytes) m_ptr->MEM_PTR, p, (phys_bytes) m_ptr->MEM_COUNT);
  25   return(OK);
  26 }
  27
  28 #endif /* USE_MEMSET */
  29