sys/arch/arm/arm32/sys_machdep.c

   1 /*      $NetBSD$        */
   2
   3 /*
   4  * Copyright (c) 1995-1997 Mark Brinicombe.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. All advertising materials mentioning features or use of this software
  16  *    must display the following acknowledgement:
  17  *      This product includes software developed by Mark Brinicombe
  18  * 4. The name of the company nor the name of the author may be used to
  19  *    endorse or promote products derived from this software without specific
  20  *    prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
  23  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  24  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  25  * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
  26  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  27  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  28  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  *
  34  * RiscBSD kernel project
  35  *
  36  * sys_machdep.c
  37  *
  38  * Machine dependant syscalls
  39  *
  40  * Created      : 10/01/96
  41  */
  42
  43 #include <sys/cdefs.h>
  44 __KERNEL_RCSID(0, "$NetBSD$");
  45
  46 #include <sys/param.h>
  47 #include <sys/systm.h>
  48 #include <sys/proc.h>
  49 #include <sys/mbuf.h>
  50 #include <sys/mount.h>
  51 #include <uvm/uvm_extern.h>
  52 #include <sys/sysctl.h>
  53 #include <sys/syscallargs.h>
  54
  55 #include <machine/sysarch.h>
  56
  57 /* Prototypes */
  58 static int arm32_sync_icache(struct lwp *, const void *, register_t *);
  59 static int arm32_drain_writebuf(struct lwp *, const void *, register_t *);
  60
  61 static int
  62 arm32_sync_icache(struct lwp *l, const void *args, register_t *retval)
  63 {
  64         struct arm_sync_icache_args ua;
  65         int error;
  66
  67         if ((error = copyin(args, &ua, sizeof(ua))) != 0)
  68                 return (error);
  69
  70         pmap_icache_sync_range(vm_map_pmap(&l->l_proc->p_vmspace->vm_map),
  71             ua.addr, ua.addr + ua.len);
  72
  73         *retval = 0;
  74         return(0);
  75 }
  76
  77 static int
  78 arm32_drain_writebuf(struct lwp *l, const void *args, register_t *retval)
  79 {
  80         /* No args. */
  81
  82         cpu_drain_writebuf();
  83
  84         *retval = 0;
  85         return(0);
  86 }
  87
  88 int
  89 sys_sysarch(struct lwp *l, const struct sys_sysarch_args *uap, register_t *retval)
  90 {
  91         /* {
  92                 syscallarg(int) op;
  93                 syscallarg(void *) parms;
  94         } */
  95         int error = 0;
  96
  97         switch(SCARG(uap, op)) {
  98         case ARM_SYNC_ICACHE :
  99                 error = arm32_sync_icache(l, SCARG(uap, parms), retval);
 100                 break;
 101
 102         case ARM_DRAIN_WRITEBUF :
 103                 error = arm32_drain_writebuf(l, SCARG(uap, parms), retval);
 104                 break;
 105
 106         default:
 107                 error = EINVAL;
 108                 break;
 109         }
 110         return (error);
 111 }
 112
 113 /* End of sys_machdep.c */