i2p/haiku-beta6
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

OF: PPC: Check for bus-frequency on '/' first

Browse Source 
As per PowerPC IEEE 1275-1994 binding v1.8 page 13.
This commit is contained in:
François Revol
2013-10-20 20:53:06 +02:00
parent b96e57e885
commit 4c7a310ce1
1 changed files with 13 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/system/boot/platform/openfirmware/arch/ppc/cpu.cpp
+13 -2
View File
@@ -26,6 +26,17 @@
status_t
boot_arch_cpu_init(void)
{
int32 busFrequency = 0;
int root = of_finddevice("/");
if (root == OF_FAILED) {
printf("boot_arch_cpu_init(): Failed to open \"/\"!\n");
return B_ERROR;
}
of_getprop(root, "clock-frequency", &busFrequency, 4);
// we might find it in /cpus instead
// iterate through the "/cpus" node to find all CPUs
int cpus = of_finddevice("/cpus");
if (cpus == OF_FAILED) {
@@ -58,8 +69,8 @@ boot_arch_cpu_init(void)
"frequency!\n");
return B_ERROR;
}
int32 busFrequency;
if (of_getprop(cpu, "bus-frequency", &busFrequency, 4)
if (busFrequency == 0
&& of_getprop(cpu, "bus-frequency", &busFrequency, 4)
== OF_FAILED) {
printf("boot_arch_cpu_init: Failed to get bus clock "
"frequency!\n");