Move psci(4) and plrtc(4) so arm64 can use them.

Tested by and ok patrick@

1 files changed, 102 insertions, 0 deletions

diff --git a/sys/dev/fdt/psci.c b/sys/dev/fdt/psci.c
new file mode 100644
index 00000000000..fceafd0e9ba
--- /dev/null
+++ b/sys/dev/fdt/psci.c
@@ -0,0 +1,102 @@
+/*	$OpenBSD: psci.c,v 1.1 2017/01/25 10:14:40 jsg Exp $	*/
+
+/*
+ * Copyright (c) 2016 Jonathan Gray <jsg@openbsd.org>
+ *
+ * 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/device.h>
+#include <sys/systm.h>
+
+#include <machine/bus.h>
+#include <machine/fdt.h>
+
+#include <dev/ofw/openfirm.h>
+#include <dev/ofw/fdt.h>
+
+extern void (*cpuresetfn)(void);
+extern void (*powerdownfn)(void);
+
+#define SYSTEM_OFF	0x84000008
+#define SYSTEM_RESET	0x84000009
+
+struct psci_softc {
+	struct device		 sc_dev;
+	void			 (*callfn)(uint32_t, uint32_t, uint32_t, uint32_t);
+};
+
+struct psci_softc *psci_sc;
+
+int	psci_match(struct device *, void *, void *);
+void	psci_attach(struct device *, struct device *, void *);
+void	psci_reset(void);
+void	psci_powerdown(void);
+
+extern void hvc_call(uint32_t, uint32_t, uint32_t, uint32_t);
+extern void smc_call(uint32_t, uint32_t, uint32_t, uint32_t);
+
+struct cfattach psci_ca = {
+	sizeof(struct psci_softc), psci_match, psci_attach
+};
+
+struct cfdriver psci_cd = {
+	NULL, "psci", DV_DULL
+};
+
+int
+psci_match(struct device *parent, void *match, void *aux)
+{
+	struct fdt_attach_args *faa = aux;
+
+	/* reset and shutdown added in 0.2 */
+	return OF_is_compatible(faa->fa_node, "arm,psci-0.2");
+}
+
+void
+psci_attach(struct device *parent, struct device *self, void *aux)
+{
+	struct psci_softc		*sc = (struct psci_softc *) self;
+	struct fdt_attach_args		*faa = aux;
+	char				 method[128];
+
+	if (OF_getprop(faa->fa_node, "method", method, sizeof(method))) {
+		if (strcmp(method, "hvc") == 0)
+			sc->callfn = hvc_call;
+		else if (strcmp(method, "smc") == 0)
+			sc->callfn = smc_call;
+	}
+
+	printf("\n");
+
+	psci_sc = sc;
+	cpuresetfn = psci_reset;
+	powerdownfn = psci_powerdown;
+}
+
+void
+psci_reset(void)
+{
+	struct psci_softc *sc = psci_sc;
+	if (sc->callfn)
+		(*sc->callfn)(SYSTEM_RESET, 0, 0, 0);
+}
+
+void
+psci_powerdown(void)
+{
+	struct psci_softc *sc = psci_sc;
+	if (sc->callfn)
+		(*sc->callfn)(SYSTEM_OFF, 0, 0, 0);
+}