system/freebsd-src
system/freebsd-src
1
0
Fork 0
mirror of https://github.com/freebsd/freebsd-src synced 2024-10-18 22:33:39 +00:00
Code Issues Packages Projects Releases Wiki Activity

Give some output about the CPU clock on IBMPOWER machines, currently read

Browse source 
from OF. Linux does it similar, means they also read the OF values and
display them.

Tested under qemu and real hardware:

	cpu0: IBM POWER5+ revision 2.0, 1898.10 MHz
This commit is contained in:
Andreas Tobler 2013-11-28 21:57:17 +00:00
parent be3d0087dc
commit a07c08cea5
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=258722
1 changed files with 41 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

41
sys/powerpc/powerpc/cpu.c
View file

@ -74,6 +74,8 @@
#include <machine/smp.h>
#include <machine/spr.h>
#include <dev/ofw/openfirm.h>
static void cpu_6xx_setup(int cpuid, uint16_t vers);
static void cpu_970_setup(int cpuid, uint16_t vers);
static void cpu_booke_setup(int cpuid, uint16_t vers);
@ -273,6 +275,10 @@ cpu_est_clockrate(int cpu_id, uint64_t *cps)
{
uint16_t vers;
register_t msr;
phandle_t cpu, dev, root;
uint32_t freq[2];
int res = 0;
char buf[8];
vers = mfpvr() >> 16;
msr = mfmsr();
@ -316,6 +322,41 @@ cpu_est_clockrate(int cpu_id, uint64_t *cps)
mtmsr(msr);
return (0);
case IBMPOWER5:
case IBMPOWER5PLUS:
case IBMPOWER6:
case IBMPOWER7:
case IBMPOWER7PLUS:
case IBMPOWER8:
root = OF_peer(0);
dev = OF_child(root);
while (dev != 0) {
res = OF_getprop(dev, "name", buf, sizeof(buf));
if (res > 0 && strcmp(buf, "cpus") == 0)
break;
dev = OF_peer(dev);
}
cpu = OF_child(dev);
while (cpu != 0) {
res = OF_getprop(cpu, "device_type", buf,
sizeof(buf));
if (res > 0 && strcmp(buf, "cpu") == 0)
break;
cpu = OF_peer(cpu);
}
if (cpu == 0)
return (ENOENT);
if (OF_getprop(cpu, "clock-frequency", &freq[0],
sizeof(freq[0])))
*cps = freq[0];
else if (OF_getprop(cpu, "ibm,extended-clock-frequency",
&freq, sizeof(freq)))
*cps = freq[1];
else
*cps = 0;
return(0);
}
return (ENXIO);