Driver for getting at performance counters. These manifest them

selves as "sc at sbus" and a couple of registers on psycho (sabre
doesn't appear to have these registers).

1 files changed, 204 insertions, 0 deletions

diff --git a/sys/arch/sparc64/dev/uperf.c b/sys/arch/sparc64/dev/uperf.c
new file mode 100644
index 00000000000..01b03f6f469
--- /dev/null
+++ b/sys/arch/sparc64/dev/uperf.c
@@ -0,0 +1,204 @@
+/*	$OpenBSD: uperf.c,v 1.1 2002/01/30 23:58:02 jason Exp $	*/
+
+/*
+ * Copyright (c) 2002 Jason L. Wright (jason@thought.net)
+ * 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 Jason L. Wright
+ * 4. 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 BY THE 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 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/types.h>
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/errno.h>
+#include <sys/device.h>
+#include <sys/malloc.h>
+#include <sys/ioctl.h>
+#include <sys/conf.h>
+
+#include <machine/conf.h>
+
+#include <arch/sparc64/dev/uperfvar.h>
+
+struct cfdriver uperf_cd = {
+	NULL, "uperf", DV_DULL
+};
+
+int uperf_getcntsrc __P((struct uperf_softc *, struct uperf_io *));
+int uperf_findbyval __P((struct uperf_softc *, int, u_int, int *));
+int uperf_findbysrc __P((struct uperf_softc *, int, int, u_int32_t *));
+int uperf_setcntsrc __P((struct uperf_softc *, struct uperf_io *));
+
+int
+uperfopen(dev, flags, mode, p)
+	dev_t dev;
+	int flags, mode;
+	struct proc *p;
+{
+	if (minor(dev) >= uperf_cd.cd_ndevs)
+		return (ENXIO);
+	if (uperf_cd.cd_devs[minor(dev)] == NULL)
+		return (ENXIO);
+	return (0);
+}
+
+int
+uperfclose(dev, flags, mode, p)
+	dev_t dev;
+	int flags, mode;
+	struct proc *p;
+{
+	return (0);
+}
+
+int
+uperfioctl(dev, cmd, data, flags, p)
+	dev_t dev;
+	u_long cmd;
+	caddr_t data;
+	int flags;
+	struct proc *p;
+{
+	struct uperf_softc *usc = uperf_cd.cd_devs[minor(dev)];
+	struct uperf_io *io = (struct uperf_io *)data;
+	int error = EINVAL;
+
+	switch (cmd) {
+	case UPIO_GCNTSRC:
+		error = uperf_getcntsrc(usc, io);
+		break;
+	case UPIO_SCNTSRC:
+		error = uperf_setcntsrc(usc, io);
+		break;
+	case UPIO_CLRCNT:
+		error = usc->usc_clrcnt(usc->usc_cookie, io->cnt_flags);
+		break;
+	case UPIO_GETCNT:
+		error = usc->usc_getcnt(usc->usc_cookie, io->cnt_flags,
+		    &io->cnt_val0, &io->cnt_val1);
+		break;
+	}
+
+	return (error);
+}
+
+int
+uperf_getcntsrc(usc, io)
+	struct uperf_softc *usc;
+	struct uperf_io *io;
+{
+	u_int cnt0_src, cnt1_src;
+	int error;
+
+	error = usc->usc_getcntsrc(usc->usc_cookie, io->cnt_flags,
+	    &cnt0_src, &cnt1_src);
+	if (error)
+		return (error);
+
+	if (io->cnt_flags & UPERF_CNT0) {
+		error = uperf_findbyval(usc, UPERF_CNT0,
+		    cnt0_src, &io->cnt_src0);
+		if (error)
+			return (error);
+	}
+
+	if (io->cnt_flags & UPERF_CNT1) {
+		error = uperf_findbyval(usc, UPERF_CNT1,
+		    cnt1_src, &io->cnt_src1);
+		if (error)
+			return (error);
+	}
+	return (0);
+}
+
+int
+uperf_findbyval(usc, cnt, uval, rval)
+	struct uperf_softc *usc;
+	int cnt;
+	u_int uval;
+	int *rval;
+{
+	struct uperf_src *srcs = usc->usc_srcs;
+
+	if (srcs->us_src == NULL)
+		return (EINVAL);
+
+	while (srcs->us_src != -1) {
+		if (srcs->us_val == uval && srcs->us_flags & cnt) {
+			*rval = srcs->us_src;
+			return (0);
+		}
+		srcs++;
+	}
+	return (EINVAL);
+}
+
+int
+uperf_setcntsrc(usc, io)
+	struct uperf_softc *usc;
+	struct uperf_io *io;
+{
+	u_int32_t cnt0_src, cnt1_src;
+	int error;
+
+	if (io->cnt_flags & UPERF_CNT0) {
+		error = uperf_findbysrc(usc, UPERF_CNT0,
+		    io->cnt_src0, &cnt0_src);
+		if (error)
+			return (error);
+	}
+	if (io->cnt_flags & UPERF_CNT1) {
+		error = uperf_findbysrc(usc, UPERF_CNT1,
+		    io->cnt_src1, &cnt1_src);
+		if (error)
+			return (error);
+	}
+	return ((usc->usc_setcntsrc)(usc->usc_cookie, io->cnt_flags,
+	    cnt0_src, cnt1_src));
+}
+
+int
+uperf_findbysrc(usc, cnt, src, rval)
+	struct uperf_softc *usc;
+	int cnt, src;
+	u_int32_t *rval;
+{
+	struct uperf_src *srcs = usc->usc_srcs;
+
+	if (srcs->us_src == NULL)
+		return (EINVAL);
+
+	while (srcs->us_src != -1) {
+		if (srcs->us_src == src && srcs->us_flags & cnt) {
+			*rval = srcs->us_val;
+			return (0);
+		}
+		srcs++;
+	}
+	return (EINVAL);
+}