Add MD syscalls to sync the icache and to drain the write buffer.

Obtained from:	NetBSD

2 files changed, 113 insertions, 1 deletions

diff --git a/sys/arm/arm/sys_machdep.c b/sys/arm/arm/sys_machdep.c
index 7db18e7..ed8960c 100644
--- a/sys/arm/arm/sys_machdep.c
+++ b/sys/arm/arm/sys_machdep.c
@@ -43,6 +43,8 @@ __FBSDID("$FreeBSD$");
 #include <sys/syscall.h>
 #include <sys/sysent.h>
 
+#include <machine/sysarch.h>
+
 #ifndef _SYS_SYSPROTO_H_
 struct sysarch_args {
 	int op;
@@ -50,11 +52,55 @@ struct sysarch_args {
 };
 #endif
 
+/* Prototypes */
+static int arm32_sync_icache (struct thread *, void *);
+static int arm32_drain_writebuf(struct thread *, void *);
+
+static int
+arm32_sync_icache(struct thread *td, void *args)
+{
+	struct arm_sync_icache_args ua;
+	int error;
+
+	if ((error = copyin(args, &ua, sizeof(ua))) != 0)
+		return (error);
+
+	cpu_icache_sync_range(ua.addr, ua.len);
+
+	td->td_retval[0] = 0;
+	return(0);
+}
+
+static int
+arm32_drain_writebuf(struct thread *td, void *args)
+{
+	/* No args. */
+
+	td->td_retval[0] = 0;
+	cpu_drain_writebuf();
+	return(0);
+}
+
 int
 sysarch(td, uap)
 	struct thread *td;
 	register struct sysarch_args *uap;
 {
-	return (0);
+	int error;
+
+	switch (uap->op) {
+	case ARM_SYNC_ICACHE : 
+		error = arm32_sync_icache(td, uap->parms);
+		break;
+		
+	case ARM_DRAIN_WRITEBUF : 
+		error = arm32_drain_writebuf(td, uap->parms);
+		break;
+		
+	default:
+		error = EINVAL;
+		break;
+	}
+	return (error);
 }
 
diff --git a/sys/arm/include/sysarch.h b/sys/arm/include/sysarch.h
new file mode 100644
index 0000000..8ff3f18
--- /dev/null
+++ b/sys/arm/include/sysarch.h
@@ -0,0 +1,66 @@
+/*	$NetBSD: sysarch.h,v 1.5 2003/09/11 09:40:12 kleink Exp $	*/
+
+/*
+ * Copyright (c) 1996-1997 Mark Brinicombe.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by Mark Brinicombe.
+ * 4. The name of the company nor the name of the author may be used to
+ *    endorse or promote products derived from this software without specific
+ *    prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/* $FreeBSD$ */
+
+#ifndef _ARM_SYSARCH_H_
+#define _ARM_SYSARCH_H_
+
+#include <sys/cdefs.h>
+
+/*
+ * Pickup definition of uintptr_t
+ */
+#include <sys/stdint.h>
+
+/*
+ * Architecture specific syscalls (arm)
+ */
+
+#define ARM_SYNC_ICACHE		0
+#define ARM_DRAIN_WRITEBUF	1
+
+struct arm_sync_icache_args {
+	uintptr_t	addr;		/* Virtual start address */
+	size_t		len;		/* Region size */
+};
+
+#ifndef _KERNEL
+__BEGIN_DECLS
+int	arm_sync_icache (u_int addr, int len);
+int	arm_drain_writebuf (void);
+__END_DECLS
+#endif
+
+#endif /* !_ARM_SYSARCH_H_ */