minix/kernel/system/do_memset.c

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/* The system call implemented in this file:
* m_type: SYS_MEMSET
*
* The parameters for this system call are:
* m5_l1: CP_SRC_ADDR (virtual address)
* m5_l2: CP_DST_ADDR (returns physical address)
* m5_l3: CP_NR_BYTES (size of datastructure)
*/
#include "../system.h"
#if USE_MEMSET
/*===========================================================================*
* do_memset *
*===========================================================================*/
PUBLIC int do_memset(m_ptr)
register message *m_ptr;
{
/* Handle sys_memset(). */
unsigned long pat;
unsigned char c = m_ptr->MEM_CHAR;
pat = c | (c << 8) | (c << 16) | (c << 24);
phys_fill((phys_bytes) m_ptr->MEM_PTR, (phys_bytes) m_ptr->MEM_COUNT, pat);
return(OK);
}
#endif /* USE_MEMSET */