diff options
| author | Jeff Garzik <jgarzik@pobox.com> | 2005-09-01 18:02:27 -0400 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@pobox.com> | 2005-09-01 18:02:27 -0400 |
| commit | ceeec3dc375e3b0618f16b34efc56fe093918f8b (patch) | |
| tree | 2293d02721ee05131aaf1c60e4fba7e281585eec /arch/ppc64/kernel/pmc.c | |
| parent | fbff868db3a4cc6a89d51da9a6d49b26c29d04fb (diff) | |
| parent | e3ee3b78f83688a0ae4315e8be71b2eac559904a (diff) | |
/spare/repo/netdev-2.6 branch 'ieee80211'
Diffstat (limited to 'arch/ppc64/kernel/pmc.c')
| -rw-r--r-- | arch/ppc64/kernel/pmc.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/arch/ppc64/kernel/pmc.c b/arch/ppc64/kernel/pmc.c index 67be773f9c0..cdfec7438d0 100644 --- a/arch/ppc64/kernel/pmc.c +++ b/arch/ppc64/kernel/pmc.c @@ -65,3 +65,24 @@ void release_pmc_hardware(void) spin_unlock(&pmc_owner_lock); } EXPORT_SYMBOL_GPL(release_pmc_hardware); + +void power4_enable_pmcs(void) +{ + unsigned long hid0; + + hid0 = mfspr(HID0); + hid0 |= 1UL << (63 - 20); + + /* POWER4 requires the following sequence */ + asm volatile( + "sync\n" + "mtspr %1, %0\n" + "mfspr %0, %1\n" + "mfspr %0, %1\n" + "mfspr %0, %1\n" + "mfspr %0, %1\n" + "mfspr %0, %1\n" + "mfspr %0, %1\n" + "isync" : "=&r" (hid0) : "i" (HID0), "0" (hid0): + "memory"); +} |