Pull OF_quiesce() out of the MI Open Firmware layer and entirely into

PPC ofw_machdep.c, in recognition of its state as a machine specific hack.

Requested by:	marius

sys/dev/ofw/ofw_if.m

@@ -339,13 +339,6 @@ METHOD void release {
 
 # Commands for returning control to the firmware
 
-/**
- * @brief Turn off firmware background activities
- */
-METHOD void quiesce {
-	ofw_t		_ofw;
-};
-
 /**
  * @brief Temporarily return control to firmware.
  */

sys/dev/ofw/ofw_standard.c

@@ -105,7 +105,6 @@ static ssize_t ofw_std_write(ofw_t ofw, ihandle_t instance, const void *addr,
 static int ofw_std_seek(ofw_t ofw, ihandle_t instance, uint64_t pos);
 static caddr_t ofw_std_claim(ofw_t ofw, void *virt, size_t size, u_int align);
 static void ofw_std_release(ofw_t ofw, void *virt, size_t size);
-static void ofw_std_quiesce(ofw_t ofw);
 static void ofw_std_enter(ofw_t ofw);
 static void ofw_std_exit(ofw_t ofw);
 
@@ -134,7 +133,6 @@ static ofw_method_t ofw_std_methods[] = {
 	OFWMETHOD(ofw_seek,			ofw_std_seek),
 	OFWMETHOD(ofw_claim,			ofw_std_claim),
 	OFWMETHOD(ofw_release,			ofw_std_release),
-	OFWMETHOD(ofw_quiesce,			ofw_std_quiesce),
 	OFWMETHOD(ofw_enter,			ofw_std_enter),
 	OFWMETHOD(ofw_exit,			ofw_std_exit),
 
@@ -732,23 +730,6 @@ ofw_std_release(ofw_t ofw, void *virt, size_t size)
  * Control transfer functions
  */
 
-/* Turn off OF background tasks */
-static void
-ofw_std_quiesce(ofw_t ofw)
-{
-	struct {
-		cell_t name;
-		cell_t nargs;
-		cell_t nreturns;
-	} args = {
-		(cell_t)"quiesce",
-		0,
-		0,
-	};
-
-	openfirmware(&args);
-}
-
 /* Suspend and drop back to the Open Firmware interface. */
 static void
 ofw_std_enter(ofw_t ofw)

sys/dev/ofw/openfirm.c

@@ -409,15 +409,6 @@ OF_release(void *virt, size_t size)
  * Control transfer functions
  */
 
-/* Turn off OF background tasks */
-void
-OF_quiesce()
-{
-
-	OFW_QUIESCE(ofw_obj);
-}
-
-
 /* Suspend and drop back to the Open Firmware interface. */
 void
 OF_enter()

sys/dev/ofw/openfirm.h

@@ -133,7 +133,6 @@ void		*OF_claim(void *virtrequest, size_t size, u_int align);
 void		OF_release(void *virt, size_t size);
 
 /* Control transfer functions */
-void		OF_quiesce(void);
 void		OF_enter(void);
 void		OF_exit(void) __attribute__((noreturn));
 

sys/powerpc/aim/ofw_machdep.c

@@ -77,6 +77,7 @@ static int	(*ofwcall)(void *);
 static void	*fdt;
 int		ofw_real_mode;
 
+static void	ofw_quiesce(void);
 static int	openfirmware(void *args);
 
 /*
@@ -281,8 +282,6 @@ OF_initial_setup(void *fdt_ptr, void *junk, int (*openfirm)(void *))
 boolean_t
 OF_bootstrap()
 {
-	char model[32];
-	phandle_t rootnode;
 	boolean_t status = FALSE;
 
 	mtx_init(&ofw_mutex, "open firmware", NULL, MTX_DEF);
@@ -302,12 +301,7 @@ OF_bootstrap()
 		 * On some machines, we need to quiesce OF to turn off
 		 * background processes.
 		 */
-		rootnode = OF_finddevice("/");
-		if (OF_getprop(rootnode, "model", model, sizeof(model)) > 0) {
-			if (strcmp(model, "PowerMac11,2") == 0 ||
-			    strcmp(model, "PowerMac12,1") == 0)
-				OF_quiesce();
-		}
+		ofw_quiesce();
 	} else {
 		status = OF_install(OFW_FDT, 0);
 
@@ -320,6 +314,39 @@ OF_bootstrap()
 	return (status);
 }
 
+static void
+ofw_quiesce(void)
+{
+	phandle_t rootnode;
+	char model[32];
+	struct {
+		cell_t name;
+		cell_t nargs;
+		cell_t nreturns;
+	} args;
+
+	/*
+	 * Only quiesce Open Firmware on PowerMac11,2 and 12,1. It is
+	 * necessary there to shut down a background thread doing fan
+	 * management, and is harmful on other machines.
+	 *
+	 * Note: we don't need to worry about which OF module we are
+	 * using since this is called only from very early boot, within
+	 * OF's boot context.
+	 */
+
+	rootnode = OF_finddevice("/");
+	if (OF_getprop(rootnode, "model", model, sizeof(model)) > 0) {
+		if (strcmp(model, "PowerMac11,2") == 0 ||
+		    strcmp(model, "PowerMac12,1") == 0) {
+			args.name = (cell_t)(uintptr_t)"quiesce";
+			args.nargs = 0;
+			args.nreturns = 0;
+			openfirmware(&args);
+		}
+	}
+}
+
 static int
 openfirmware(void *args)
 {

sys/powerpc/ofw/ofw_real.c

@@ -106,7 +106,6 @@ static ssize_t ofw_real_write(ofw_t, ihandle_t instance, const void *addr,
 static int ofw_real_seek(ofw_t, ihandle_t instance, u_int64_t pos);
 static caddr_t ofw_real_claim(ofw_t, void *virt, size_t size, u_int align);
 static void ofw_real_release(ofw_t, void *virt, size_t size);
-static void ofw_real_quiesce(ofw_t);
 static void ofw_real_enter(ofw_t);
 static void ofw_real_exit(ofw_t);
 
@@ -134,7 +133,6 @@ static ofw_method_t ofw_real_methods[] = {
 	OFWMETHOD(ofw_seek,			ofw_real_seek),
 	OFWMETHOD(ofw_claim,			ofw_real_claim),
 	OFWMETHOD(ofw_release,			ofw_real_release),
-	OFWMETHOD(ofw_quiesce,			ofw_real_quiesce),
 	OFWMETHOD(ofw_enter,			ofw_real_enter),
 	OFWMETHOD(ofw_exit,			ofw_real_exit),
 
@@ -891,27 +889,6 @@ ofw_real_release(ofw_t ofw, void *virt, size_t size)
  * Control transfer functions
  */
 
-/* Turn off OF background tasks */
-static void
-ofw_real_quiesce(ofw_t ofw)
-{
-	vm_offset_t argsptr;
-	struct {
-		cell_t name;
-		cell_t nargs;
-		cell_t nreturns;
-	} args;
-
-	args.name = (cell_t)(uintptr_t)"quiesce";
-	args.nargs = 0;
-	args.nreturns = 0;
-
-	ofw_real_start();
-	argsptr = ofw_real_map(&args, sizeof(args));
-	openfirmware((void *)argsptr);
-	ofw_real_stop();
-}
-
 /* Suspend and drop back to the Open Firmware interface. */
 static void
 ofw_real_enter(ofw_t ofw)