d/freebsd-skq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Cache the Open Firmware CPU properties at attach time, so we don't always

Browse Source 
enter it at runtime to get static data.
This commit is contained in:
jhibbits 2013-06-23 14:20:54 +00:00
parent c553e460ee
commit 8d088e6958
1 changed files with 19 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
sys/powerpc/ofw/ofw_cpu.c
View File

@ -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);
}