Initial revision

2005-04-21 14:53:53 +00:00
commit 9865aeaa79
2264 changed files with 411685 additions and 0 deletions
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+/* The system call implemented in this file:
+ *   m_type:	SYS_PHYSCOPY
+ *
+ * The parameters for this system call are:
+ *    m5_l1:	CP_SRC_ADDR	(physical source address)	
+ *    m5_l2:	CP_DST_ADDR	(physical destination address)	
+ *    m5_l3:	CP_NR_BYTES	(number of bytes to copy)
+ * 
+ * Author:
+ *    Jorrit N. Herder <jnherder@cs.vu.nl>
+ */
+
+#include "../kernel.h"
+#include "../system.h"
+
+/*===========================================================================*
+ *				do_physcopy					     *
+ *===========================================================================*/
+PUBLIC int do_physcopy(m_ptr)
+register message *m_ptr;	/* pointer to request message */
+{
+/* Handle sys_physcopy().  Copy data by using physical addressing. */
+
+  phys_bytes src_phys, dst_phys, bytes;
+
+  /* Dismember the command message. */
+  src_phys = (phys_bytes) m_ptr->CP_SRC_ADDR;
+  dst_phys = (phys_bytes) m_ptr->CP_DST_ADDR;
+  bytes = (phys_bytes) m_ptr->CP_NR_BYTES;
+
+  /* Do some checks and copy the data. */
+  if (src_phys == 0 || dst_phys == 0)  return(EFAULT);
+  phys_copy(src_phys, dst_phys, bytes);
+  return(OK);
+}
+
+