From 180a33627d958d5d9d3602dde6ac74b315e136f0 Mon Sep 17 00:00:00 2001 From: Michael Ellerman Date: Tue, 9 Aug 2005 11:13:36 +1000 Subject: [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 Signed-off-by: Paul Mackerras --- arch/ppc64/kernel/pmc.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) (limited to 'arch/ppc64/kernel/pmc.c') 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"); +} -- cgit v1.2.3