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| author | marcel <marcel@FreeBSD.org> | 2009-12-23 06:52:12 +0000 |
|---|---|---|
| committer | marcel <marcel@FreeBSD.org> | 2009-12-23 06:52:12 +0000 |
| commit | 23c3bda2df0c608f826b3c7bb89df2c2975f9214 (patch) | |
| tree | 5674061ad293ecf646944e620d10b54b28df54fd | |
| parent | 6c6778bb48b1c2300ef6ed51d5ef47cbeaa34830 (diff) | |
| download | FreeBSD-src-23c3bda2df0c608f826b3c7bb89df2c2975f9214.zip FreeBSD-src-23c3bda2df0c608f826b3c7bb89df2c2975f9214.tar.gz | |
Calculate the average CPU clock frequency and export that through
the hw.freq.cpu sysctl variable. This can be used by ports that
need to know "the" CPU frequency.
| -rw-r--r-- | sys/sparc64/sparc64/identcpu.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/sys/sparc64/sparc64/identcpu.c b/sys/sparc64/sparc64/identcpu.c index 020dc924..cdb09e6 100644 --- a/sys/sparc64/sparc64/identcpu.c +++ b/sys/sparc64/sparc64/identcpu.c @@ -27,6 +27,13 @@ static char cpu_model[128]; SYSCTL_STRING(_hw, HW_MODEL, model, CTLFLAG_RD, cpu_model, 0, "Machine model"); +SYSCTL_NODE(_hw, OID_AUTO, freq, CTLFLAG_RD, 0, ""); + +static u_int cpu_count; +static u_int cpu_freq; +SYSCTL_UINT(_hw_freq, OID_AUTO, cpu, CTLFLAG_RD, &cpu_freq, 0, + "CPU clock frequency"); + int cpu_impl; void @@ -104,4 +111,11 @@ cpu_identify(u_long vers, u_int freq, u_int id) printf(" mask=0x%lx maxtl=%ld maxwin=%ld\n", VER_MASK(vers), VER_MAXTL(vers), VER_MAXWIN(vers)); } + + /* + * Calculate the average CPU frequency. + */ + freq = (freq + 500000ul) / 1000000ul; + cpu_freq = (cpu_freq * cpu_count + freq) / (cpu_count + 1); + cpu_count++; } |
