ACPI support for bhyve.

The -A option will create the minimal set of required ACPI tables in
guest memory. Since ACPI mandates an IOAPIC, the -I option must also
be used.

Template ASL files are created, and then passed to the iasl compiler
to generate AML files. These are then loaded into guest physical mem.

In support of this, the ACPI PM timer is implemented, in 32-bit mode.

Tested on 7.4/8.*/9.*/10-CURRENT.

Reviewed by:	neel
Obtained from:	NetApp
Discussed with:	jhb (a long while back)

1 files changed, 101 insertions, 0 deletions

diff --git a/usr.sbin/bhyve/pmtmr.c b/usr.sbin/bhyve/pmtmr.c
new file mode 100644
index 0000000..11e7ae0
--- /dev/null
+++ b/usr.sbin/bhyve/pmtmr.c
@@ -0,0 +1,101 @@
+/*-
+ * Copyright (c) 2012 NetApp, Inc.
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``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 NETAPP, INC 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.
+ *
+ * $FreeBSD$
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/types.h>
+#include <sys/sysctl.h>
+#include <sys/time.h>
+#include <machine/cpufunc.h>
+
+#include <stdio.h>
+#include <time.h>
+#include <assert.h>
+
+#include "inout.h"
+
+/*
+ * The ACPI Power Management timer is a free-running 24- or 32-bit
+ * timer with a frequency of 3.579545MHz
+ *
+ * This implementation will be 32-bits
+ */
+
+#define	IO_PMTMR	0x408	/* 4-byte i/o port for the timer */
+
+#define PMTMR_FREQ	3579545  /* 3.579545MHz */
+
+static uint32_t	pmtmr_tscf;
+static uint32_t	pmtmr_old;
+static uint64_t	pmtmr_tsc_old;
+
+static uint32_t
+pmtmr_val(void)
+{
+	uint64_t	pmtmr_tsc_new;
+	uint32_t	pmtmr_new;
+	static int	inited = 0;
+
+	if (!inited) {
+		size_t len;
+
+		inited = 1;
+		len = sizeof(pmtmr_tscf);
+		sysctlbyname("machdep.tsc_freq", &pmtmr_tscf, &len,
+		    NULL, 0);
+		pmtmr_tsc_old = rdtsc();
+		pmtmr_old = pmtmr_tsc_old / pmtmr_tscf * PMTMR_FREQ;
+		return (pmtmr_old);
+	}
+
+	pmtmr_tsc_new = rdtsc();
+	pmtmr_new = (pmtmr_tsc_new - pmtmr_tsc_old) * PMTMR_FREQ / pmtmr_tscf +
+	    pmtmr_old;
+	pmtmr_old = pmtmr_new;
+	pmtmr_tsc_old = pmtmr_tsc_new;
+
+	return (pmtmr_old); 
+}
+
+static int
+pmtmr_handler(struct vmctx *ctx, int vcpu, int in, int port, int bytes,
+	          uint32_t *eax, void *arg)
+{
+	assert(in == 1);
+
+	if (bytes != 4)
+		return (-1);
+
+	*eax = pmtmr_val();
+
+	return (0);
+}
+
+INOUT_PORT(pmtmr, IO_PMTMR, IOPORT_F_IN, pmtmr_handler);
+