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| author | Jeff Garzik <jgarzik@pobox.com> | 2005-08-30 13:32:29 -0400 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@pobox.com> | 2005-08-30 13:32:29 -0400 |
| commit | ed735ccbefaf7e5e3ef61418f7e209b8c59308a7 (patch) | |
| tree | b8cc69814d2368b08d0a84c8da0c12028bd04867 /arch/ppc64/kernel/pmc.c | |
| parent | 39fbe47377062200acc26ea0ccef223b4399a82c (diff) | |
| parent | d8971fcb702e24d1e22c77fd1772f182ffee87e3 (diff) | |
Merge HEAD from /spare/repo/linux-2.6/.git
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"); +} |