Author: jhibbits
Date: Sun Jun 23 14:20:54 2013
New Revision: 252115
URL: http://svnweb.freebsd.org/changeset/base/252115
Log:
Cache the Open Firmware CPU properties at attach time, so we don't always
enter it at runtime to get static data.
Modified:
head/sys/powerpc/ofw/ofw_cpu.c
Modified: head/sys/powerpc/ofw/ofw_cpu.c
==============================================================================
--- head/sys/powerpc/ofw/ofw_cpu.c Sun Jun 23 13:27:37 2013
(r252114)
+++ head/sys/powerpc/ofw/ofw_cpu.c Sun Jun 23 14:20:54 2013
(r252115)
@@ -133,6 +133,11 @@ static int ofw_cpu_attach(device_t);
static int ofw_cpu_read_ivar(device_t dev, device_t child, int index,
uintptr_t *result);
+struct ofw_cpu_softc {
+ struct pcpu *sc_cpu_pcpu;
+ uint32_t sc_nominal_mhz;
+};
+
static device_method_t ofw_cpu_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, ofw_cpu_probe),
@@ -175,6 +180,15 @@ ofw_cpu_probe(device_t dev)
static int
ofw_cpu_attach(device_t dev)
{
+ struct ofw_cpu_softc *sc;
+ uint32_t cell;
+
+ sc = device_get_softc(dev);
+ OF_getprop(ofw_bus_get_node(dev), "reg", &cell, sizeof(cell));
+ sc->sc_cpu_pcpu = pcpu_find(cell);
+ OF_getprop(ofw_bus_get_node(dev), "clock-frequency", &cell,
sizeof(cell));
+ sc->sc_nominal_mhz = cell / 1000000; /* convert to MHz */
+
bus_generic_probe(dev);
return (bus_generic_attach(dev));
}
@@ -182,19 +196,16 @@ ofw_cpu_attach(device_t dev)
static int
ofw_cpu_read_ivar(device_t dev, device_t child, int index, uintptr_t *result)
{
- uint32_t cell;
+ struct ofw_cpu_softc *sc;
+
+ sc = device_get_softc(dev);
switch (index) {
case CPU_IVAR_PCPU:
- OF_getprop(ofw_bus_get_node(dev), "reg", &cell, sizeof(cell));
- *result = (uintptr_t)(pcpu_find(cell));
+ *result = (uintptr_t)sc->sc_cpu_pcpu;
return (0);
case CPU_IVAR_NOMINAL_MHZ:
- cell = 0;
- OF_getprop(ofw_bus_get_node(dev), "clock-frequency",
- &cell, sizeof(cell));
- cell /= 1000000; /* convert to MHz */
- *result = (uintptr_t)(cell);
+ *result = (uintptr_t)sc->sc_nominal_mhz;
return (0);
}
_______________________________________________
svn-src-head@freebsd.org mailing list
http://lists.freebsd.org/mailman/listinfo/svn-src-head
To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
