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| author | Michael Ellerman | 2005-08-09 03:13:36 +0200 |
|---|---|---|
| committer | Paul Mackerras | 2005-08-29 02:53:38 +0200 |
| commit | 180a33627d958d5d9d3602dde6ac74b315e136f0 (patch) | |
| tree | 2c480741288f1f27ff3b65a95bb67fdf2f206a8f /arch/ppc64/kernel/pmc.c | |
| parent | [PATCH] ppc64: allow xmon=off (diff) | |
| download | kernel-qcow2-linux-180a33627d958d5d9d3602dde6ac74b315e136f0.tar.gz kernel-qcow2-linux-180a33627d958d5d9d3602dde6ac74b315e136f0.tar.xz kernel-qcow2-linux-180a33627d958d5d9d3602dde6ac74b315e136f0.zip | |
[PATCH] ppc64: Move ppc64_enable_pmcs() logic into a ppc_md function
This patch moves power4_enable_pmcs() to arch/ppc64/kernel/pmc.c.
I've tested it on P5 LPAR and P4. It does what it used to.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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 67be773f9c00..cdfec7438d01 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"); +} |