Xen basic infrastructure files and pvbus(4) attachment.

With input from and OK mpi, mlarkin, reyk

2 files changed, 97 insertions, 1 deletions

diff --git a/sys/dev/pv/files.pv b/sys/dev/pv/files.pv
index 2acad4b1f62..f5e606e9615 100644
--- a/sys/dev/pv/files.pv
+++ b/sys/dev/pv/files.pv
@@ -1,4 +1,4 @@
-#	$OpenBSD: files.pv,v 1.2 2015/07/21 09:13:11 reyk Exp $
+#	$OpenBSD: files.pv,v 1.3 2015/12/08 18:46:25 mikeb Exp $
 #
 # Config file and device description for paravirtual devices.
 # Included by ports that need it.
@@ -12,3 +12,8 @@ file	dev/pv/pvbus.c			pvbus	needs-flag
 device	vmt
 attach	vmt at pvbus
 file	dev/pv/vmt.c			vmt	needs-flag
+
+# Xen
+device	xen {}
+attach	xen at pvbus
+file	dev/pv/xen.c			xen	needs-flag
diff --git a/sys/dev/pv/xen.c b/sys/dev/pv/xen.c
new file mode 100644
index 00000000000..9ca3c571427
--- /dev/null
+++ b/sys/dev/pv/xen.c
@@ -0,0 +1,91 @@
+/*
+ * Copyright (c) 2015 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.
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/atomic.h>
+#include <sys/malloc.h>
+#include <sys/kernel.h>
+#include <sys/device.h>
+
+#include <machine/bus.h>
+#include <machine/cpu.h>
+#include <machine/cpufunc.h>
+
+#include <uvm/uvm_extern.h>
+
+#include <dev/pv/pvvar.h>
+#include <dev/pv/xenvar.h>
+
+struct xen_softc *xen_sc;
+
+int 	xen_match(struct device *, void *, void *);
+void	xen_attach(struct device *, struct device *, void *);
+void	xen_resume(struct device *);
+int	xen_activate(struct device *, int);
+
+const struct cfdriver xen_cd = {
+	NULL, "xen", DV_DULL
+};
+
+const struct cfattach xen_ca = {
+	sizeof(struct xen_softc), xen_match, xen_attach, NULL, xen_activate
+};
+
+int
+xen_match(struct device *parent, void *match, void *aux)
+{
+	struct pv_attach_args *pva = aux;
+	struct pvbus_hv *hv = &pva->pva_hv[PVBUS_XEN];
+
+	if (hv->hv_base == 0)
+		return (0);
+
+	return (1);
+}
+
+void
+xen_attach(struct device *parent, struct device *self, void *aux)
+{
+	struct pv_attach_args *pva = (struct pv_attach_args *)aux;
+	struct pvbus_hv *hv = &pva->pva_hv[PVBUS_XEN];
+	struct xen_softc *sc = (struct xen_softc *)self;
+
+	sc->sc_base = hv->hv_base;
+
+	printf("\n");
+
+	/* Wire it up to the global */
+	xen_sc = sc;
+}
+
+void
+xen_resume(struct device *self)
+{
+}
+
+int
+xen_activate(struct device *self, int act)
+{
+	int rv = 0;
+
+	switch (act) {
+	case DVACT_RESUME:
+		xen_resume(self);
+		break;
+	}
+	return (rv);
+}