port of i386 pctr code to amd64; Mike Belopuhov

2 files changed, 82 insertions, 1 deletions

diff --git a/sys/arch/amd64/include/conf.h b/sys/arch/amd64/include/conf.h
index 960b06eae53..ced984a5b7f 100644
--- a/sys/arch/amd64/include/conf.h
+++ b/sys/arch/amd64/include/conf.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: conf.h,v 1.3 2005/12/31 21:22:32 miod Exp $	*/
+/*	$OpenBSD: conf.h,v 1.4 2007/09/12 18:18:27 deraadt Exp $	*/
 /*	$NetBSD: conf.h,v 1.2 1996/05/05 19:28:34 christos Exp $	*/
 
 /*
@@ -50,3 +50,6 @@ cdev_decl(bios);
 	(dev_type_stop((*))) enodev, 0, (dev_type_poll((*))) enodev, \
 	(dev_type_mmap((*))) enodev, 0, D_KQFILTER, dev_init(c,n,kqfilter) }
 cdev_decl(acpi);
+
+#define pctrpoll seltrue
+cdev_decl(pctr);
diff --git a/sys/arch/amd64/include/pctr.h b/sys/arch/amd64/include/pctr.h
new file mode 100644
index 00000000000..35c651ebffd
--- /dev/null
+++ b/sys/arch/amd64/include/pctr.h
@@ -0,0 +1,78 @@
+/*	$OpenBSD: pctr.h,v 1.1 2007/09/12 18:18:27 deraadt Exp $	*/
+
+/*
+ * Copyright (c) 2007 Mike Belopuhov
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/*
+ * Pentium performance counter driver for OpenBSD.
+ * Copyright 1996 David Mazieres <dm@lcs.mit.edu>.
+ *
+ * Modification and redistribution in source and binary forms is
+ * permitted provided that due credit is given to the author and the
+ * OpenBSD project by leaving this copyright notice intact.
+ */
+
+#ifndef _AMD64_PCTR_H_
+#define _AMD64_PCTR_H_
+
+#include <sys/ioccom.h>
+
+#define PCTR_NUM	4
+#define PCTR_AMD_NUM	PCTR_NUM
+#define PCTR_INTEL_NUM	2		/* Intel supports only 2 counters */
+
+struct pctrst {
+	u_int64_t pctr_hwc[PCTR_NUM];	/* Values of the hardware counters */
+	u_int64_t pctr_tsc;		/* Free-running 64-bit cycle counter */
+	u_int64_t pctr_idl;		/* Iterations of the idle loop */
+	u_int32_t pctr_fn[PCTR_NUM];	/* Current settings of counters */
+};
+
+/* Bit values in fn fields and PIOCS ioctl's */
+#define PCTR_U		0x010000	/* Monitor user-level events */
+#define PCTR_K		0x020000	/* Monitor kernel-level events */
+#define PCTR_E		0x040000	/* Edge detect */
+#define PCTR_EN		0x400000	/* Enable counters (counter 0 only) */
+#define PCTR_I		0x800000	/* Invert counter mask */
+
+/* Unit Mask bits */
+#define PCTR_UM_M	0x10		/* Modified cache lines */
+#define PCTR_UM_O	0x08		/* Owned cache lines */
+#define PCTR_UM_E	0x04		/* Exclusive cache lines */
+#define PCTR_UM_S	0x02		/* Shared cache lines */
+#define PCTR_UM_I	0x01		/* Invalid cache lines */
+#define PCTR_UM_MESI	(PCTR_UM_O|PCTR_UM_E|PCTR_UM_S|PCTR_UM_I)
+#define PCTR_UM_MOESI	(PCTR_UM_M|PCTR_UM_O|PCTR_UM_E|PCTR_UM_S|PCTR_UM_I)
+
+/* ioctl to set which counter a device tracks. */
+#define PCIOCRD	_IOR('c', 1,  struct pctrst)	/* Read counter value */
+#define PCIOCS0	_IOW('c', 8,  unsigned int)	/* Set counter 0 function */
+#define PCIOCS1 _IOW('c', 9,  unsigned int)	/* Set counter 1 function */
+#define PCIOCS2 _IOW('c', 10, unsigned int)	/* Set counter 2 function */
+#define PCIOCS3 _IOW('c', 11, unsigned int)	/* Set counter 3 function */
+
+#define _PATH_PCTR	"/dev/pctr"
+
+#ifdef _KERNEL
+
+void	pctrattach(int);
+int	pctropen(dev_t, int, int, struct proc *);
+int	pctrclose(dev_t, int, int, struct proc *);
+int	pctrioctl(dev_t, u_int64_t, caddr_t, int, struct proc *);
+int	pctrsel(int fflag, u_int32_t, u_int32_t);
+
+#endif /* _KERNEL */
+#endif /* ! _AMD64_PCTR_H_ */