Dummy mutex code for arm platforms. ok drahn@ deraadt@

7 files changed, 263 insertions, 5 deletions

diff --git a/sys/arch/arm/xscale/files.i80321 b/sys/arch/arm/xscale/files.i80321
index 90d2d6d69f0..86b6ca05f1e 100644
--- a/sys/arch/arm/xscale/files.i80321
+++ b/sys/arch/arm/xscale/files.i80321
@@ -1,4 +1,4 @@
-# $OpenBSD: files.i80321,v 1.3 2006/06/27 05:18:25 drahn Exp $
+# $OpenBSD: files.i80321,v 1.4 2007/05/15 05:26:44 miod Exp $
 device  iopxs {}: pcibus, bus_space_generic, gpiobus
 file	arch/arm/xscale/i80321_space.c			iopxs
 file	arch/arm/xscale/i80321_mcu.c			iopxs
@@ -7,6 +7,7 @@ file	arch/arm/xscale/i80321_pci.c			iopxs
 
 file	arch/arm/xscale/i80321_intr.c			iopxs
 file	arch/arm/xscale/i80321_clock.c			iopxs
+file	arch/arm/xscale/i80321_mutex.c			iopxs
 
 # I2C controller unit
 device	iopiic: i2cbus
diff --git a/sys/arch/arm/xscale/files.pxa2x0 b/sys/arch/arm/xscale/files.pxa2x0
index 64a50c32aff..1439e545514 100644
--- a/sys/arch/arm/xscale/files.pxa2x0
+++ b/sys/arch/arm/xscale/files.pxa2x0
@@ -1,4 +1,4 @@
-#	$OpenBSD: files.pxa2x0,v 1.20 2007/03/18 20:53:10 uwe Exp $
+#	$OpenBSD: files.pxa2x0,v 1.21 2007/05/15 05:26:44 miod Exp $
 #	$NetBSD: files.pxa2x0,v 1.6 2004/05/01 19:09:14 thorpej Exp $
 #
 # Configuration info for Intel PXA2[51]0 CPU support
@@ -22,6 +22,7 @@ file	arch/arm/xscale/pxa2x0_dma.c
 device	pxaintc
 attach	pxaintc at pxaip
 file	arch/arm/xscale/pxa2x0_intr.c		pxaintc needs-flag
+file	arch/arm/xscale/pxa2x0_mutex.c		pxaintc
 #defflag  opt_pxa2x0_gpio.h		PXAGPIO_HAS_GPION_INTRS
 
 # GPIO controller
diff --git a/sys/arch/arm/xscale/i80321_mutex.c b/sys/arch/arm/xscale/i80321_mutex.c
new file mode 100644
index 00000000000..c19da126124
--- /dev/null
+++ b/sys/arch/arm/xscale/i80321_mutex.c
@@ -0,0 +1,67 @@
+/*	$OpenBSD: i80321_mutex.c,v 1.1 2007/05/15 05:26:44 miod Exp $	*/
+
+/*
+ * Copyright (c) 2004 Artur Grabowski <art@openbsd.org>
+ * 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. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED ``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
+ * THE AUTHOR 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. 
+ */
+
+#include <sys/param.h>
+#include <sys/mutex.h>
+#include <sys/systm.h>
+
+#include <machine/intr.h>
+
+#ifdef MULTIPROCESSOR
+#error This code needs work
+#endif
+
+/*
+ * Single processor systems don't need any mutexes, but they need the spl
+ * raising semantics of the mutexes.
+ */
+void
+mtx_init(struct mutex *mtx, int wantipl)
+{
+	mtx->mtx_oldipl = 0;
+	mtx->mtx_wantipl = wantipl;
+	mtx->mtx_lock = 0;
+}
+
+void
+mtx_enter(struct mutex *mtx)
+{
+	if (mtx->mtx_wantipl != IPL_NONE)
+		mtx->mtx_oldipl = _splraise(mtx->mtx_wantipl);
+
+	MUTEX_ASSERT_UNLOCKED(mtx);
+	mtx->mtx_lock = 1;
+}
+
+void
+mtx_leave(struct mutex *mtx)
+{
+	MUTEX_ASSERT_LOCKED(mtx);
+	mtx->mtx_lock = 0;
+	if (mtx->mtx_wantipl != IPL_NONE)
+		splx(mtx->mtx_oldipl);
+}
diff --git a/sys/arch/arm/xscale/i80321_mutex.h b/sys/arch/arm/xscale/i80321_mutex.h
new file mode 100644
index 00000000000..2334d61d39f
--- /dev/null
+++ b/sys/arch/arm/xscale/i80321_mutex.h
@@ -0,0 +1,61 @@
+/*	$OpenBSD: i80321_mutex.h,v 1.1 2007/05/15 05:26:44 miod Exp $	*/
+
+/*
+ * Copyright (c) 2004 Artur Grabowski <art@openbsd.org>
+ * 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. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED ``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
+ * THE AUTHOR 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. 
+ */
+
+#ifndef _MACHINE_MUTEX_H_
+#define _MACHINE_MUTEX_H_
+
+/*
+ * Simple non-mp implementation.
+ */
+struct mutex {
+	int mtx_lock;
+	int mtx_wantipl;
+	int mtx_oldipl;
+};
+
+void mtx_init(struct mutex *, int);
+
+#define MUTEX_INITIALIZER(ipl) { 0, ipl, 0 }
+
+#ifdef DIAGNOSTIC
+#define MUTEX_ASSERT_LOCKED(mtx) do {					\
+	if ((mtx)->mtx_lock == 0)					\
+		panic("mutex %p not held in %s", (mtx), __func__);	\
+} while (0)
+
+#define MUTEX_ASSERT_UNLOCKED(mtx) do {					\
+	if ((mtx)->mtx_lock != 0)					\
+		panic("mutex %p held in %s", (mtx), __func__);		\
+} while (0)
+#else
+#define MUTEX_ASSERT_LOCKED(mtx) do { } while (0)
+#define MUTEX_ASSERT_UNLOCKED(mtx) do { } while (0)
+#endif
+
+#define MUTEX_OLDIPL(mtx)	(mtx)->mtx_oldipl
+
+#endif
diff --git a/sys/arch/arm/xscale/pxa2x0_intr.h b/sys/arch/arm/xscale/pxa2x0_intr.h
index c12651ad38a..28285b796b4 100644
--- a/sys/arch/arm/xscale/pxa2x0_intr.h
+++ b/sys/arch/arm/xscale/pxa2x0_intr.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: pxa2x0_intr.h,v 1.9 2005/09/22 04:14:44 drahn Exp $ */
+/*	$OpenBSD: pxa2x0_intr.h,v 1.10 2007/05/15 05:26:44 miod Exp $ */
 /*	$NetBSD: pxa2x0_intr.h,v 1.4 2003/07/05 06:53:08 dogcow Exp $ */
 
 /* Derived from i80321_intr.h */
@@ -47,7 +47,6 @@
 
 #include <arm/armreg.h>
 #include <arm/cpufunc.h>
-#include <machine/intr.h>
 #include <arm/softintr.h>
 
 extern vaddr_t pxaic_base;		/* Shared with pxa2x0_irq.S */
@@ -106,5 +105,6 @@ const char *pxa2x0_intr_string(void *cookie);
 
 #endif /* ! _LOCORE */
 
-#endif /* _PXA2X0_INTR_H_ */
+#define splassert(wantipl) do { /* nada */ } while (0)
 
+#endif /* _PXA2X0_INTR_H_ */
diff --git a/sys/arch/arm/xscale/pxa2x0_mutex.c b/sys/arch/arm/xscale/pxa2x0_mutex.c
new file mode 100644
index 00000000000..605f9b02b56
--- /dev/null
+++ b/sys/arch/arm/xscale/pxa2x0_mutex.c
@@ -0,0 +1,67 @@
+/*	$OpenBSD: pxa2x0_mutex.c,v 1.1 2007/05/15 05:26:44 miod Exp $	*/
+
+/*
+ * Copyright (c) 2004 Artur Grabowski <art@openbsd.org>
+ * 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. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED ``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
+ * THE AUTHOR 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. 
+ */
+
+#include <sys/param.h>
+#include <sys/mutex.h>
+#include <sys/systm.h>
+
+#include <machine/intr.h>
+
+#ifdef MULTIPROCESSOR
+#error This code needs work
+#endif
+
+/*
+ * Single processor systems don't need any mutexes, but they need the spl
+ * raising semantics of the mutexes.
+ */
+void
+mtx_init(struct mutex *mtx, int wantipl)
+{
+	mtx->mtx_oldipl = 0;
+	mtx->mtx_wantipl = wantipl;
+	mtx->mtx_lock = 0;
+}
+
+void
+mtx_enter(struct mutex *mtx)
+{
+	if (mtx->mtx_wantipl != IPL_NONE)
+		mtx->mtx_oldipl = _splraise(mtx->mtx_wantipl);
+
+	MUTEX_ASSERT_UNLOCKED(mtx);
+	mtx->mtx_lock = 1;
+}
+
+void
+mtx_leave(struct mutex *mtx)
+{
+	MUTEX_ASSERT_LOCKED(mtx);
+	mtx->mtx_lock = 0;
+	if (mtx->mtx_wantipl != IPL_NONE)
+		splx(mtx->mtx_oldipl);
+}
diff --git a/sys/arch/arm/xscale/pxa2x0_mutex.h b/sys/arch/arm/xscale/pxa2x0_mutex.h
new file mode 100644
index 00000000000..afe348dd86a
--- /dev/null
+++ b/sys/arch/arm/xscale/pxa2x0_mutex.h
@@ -0,0 +1,61 @@
+/*	$OpenBSD: pxa2x0_mutex.h,v 1.1 2007/05/15 05:26:44 miod Exp $	*/
+
+/*
+ * Copyright (c) 2004 Artur Grabowski <art@openbsd.org>
+ * 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. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED ``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
+ * THE AUTHOR 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. 
+ */
+
+#ifndef _MACHINE_MUTEX_H_
+#define _MACHINE_MUTEX_H_
+
+/*
+ * Simple non-mp implementation.
+ */
+struct mutex {
+	int mtx_lock;
+	int mtx_wantipl;
+	int mtx_oldipl;
+};
+
+void mtx_init(struct mutex *, int);
+
+#define MUTEX_INITIALIZER(ipl) { 0, ipl, 0 }
+
+#ifdef DIAGNOSTIC
+#define MUTEX_ASSERT_LOCKED(mtx) do {					\
+	if ((mtx)->mtx_lock == 0)					\
+		panic("mutex %p not held in %s", (mtx), __func__);	\
+} while (0)
+
+#define MUTEX_ASSERT_UNLOCKED(mtx) do {					\
+	if ((mtx)->mtx_lock != 0)					\
+		panic("mutex %p held in %s", (mtx), __func__);		\
+} while (0)
+#else
+#define MUTEX_ASSERT_LOCKED(mtx) do { } while (0)
+#define MUTEX_ASSERT_UNLOCKED(mtx) do { } while (0)
+#endif
+
+#define MUTEX_OLDIPL(mtx)	(mtx)->mtx_oldipl
+
+#endif