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authorDavid Gibson <david@gibson.dropbear.id.au>2005-10-19 06:53:32 +0200
committerPaul Mackerras <paulus@samba.org>2005-10-20 08:22:24 +0200
commitf7f6f4fea68d9981d65f99a589ad85f510924d99 (patch)
tree99eea889bb2ec2967a2be883a63ef58507a25cf9 /arch/ppc64/kernel/pmc.c
parent[PATCH] ppc32: replace use of _GLOBAL with .globl for ppc32 (diff)
downloadlinux-f7f6f4fea68d9981d65f99a589ad85f510924d99.tar.xz
linux-f7f6f4fea68d9981d65f99a589ad85f510924d99.zip
[PATCH] powerpc: Merge ppc64 pmc.[ch] with ppc32 perfmon.[ch]
This patches the ppc32 and ppc64 versions of the headers and .c files with helper functions for manipulating the performance counting hardware. As a side effect, it removes use of the term "perfmon" from ppc32, thus avoiding confusion with the unrelated performance counter interface from HP Labs also called "perfmon". Built, but not booted, for g5, pSeries, iSeries, and 32-bit Powermac with both ARCH=powerpc and ARCH=ppc{,64} as appropriate. Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/ppc64/kernel/pmc.c')
-rw-r--r--arch/ppc64/kernel/pmc.c88
1 files changed, 0 insertions, 88 deletions
diff --git a/arch/ppc64/kernel/pmc.c b/arch/ppc64/kernel/pmc.c
deleted file mode 100644
index 944d7df7935f..000000000000
--- a/arch/ppc64/kernel/pmc.c
+++ /dev/null
@@ -1,88 +0,0 @@
-/*
- * linux/arch/ppc64/kernel/pmc.c
- *
- * Copyright (C) 2004 David Gibson, IBM Corporation.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
-
-#include <linux/config.h>
-#include <linux/errno.h>
-#include <linux/spinlock.h>
-#include <linux/module.h>
-
-#include <asm/processor.h>
-#include <asm/pmc.h>
-
-/* Ensure exceptions are disabled */
-static void dummy_perf(struct pt_regs *regs)
-{
- unsigned int mmcr0 = mfspr(SPRN_MMCR0);
-
- mmcr0 &= ~(MMCR0_PMXE|MMCR0_PMAO);
- mtspr(SPRN_MMCR0, mmcr0);
-}
-
-static DEFINE_SPINLOCK(pmc_owner_lock);
-static void *pmc_owner_caller; /* mostly for debugging */
-perf_irq_t perf_irq = dummy_perf;
-
-int reserve_pmc_hardware(perf_irq_t new_perf_irq)
-{
- int err = 0;
-
- spin_lock(&pmc_owner_lock);
-
- if (pmc_owner_caller) {
- printk(KERN_WARNING "reserve_pmc_hardware: "
- "PMC hardware busy (reserved by caller %p)\n",
- pmc_owner_caller);
- err = -EBUSY;
- goto out;
- }
-
- pmc_owner_caller = __builtin_return_address(0);
- perf_irq = new_perf_irq ? : dummy_perf;
-
- out:
- spin_unlock(&pmc_owner_lock);
- return err;
-}
-EXPORT_SYMBOL_GPL(reserve_pmc_hardware);
-
-void release_pmc_hardware(void)
-{
- spin_lock(&pmc_owner_lock);
-
- WARN_ON(! pmc_owner_caller);
-
- pmc_owner_caller = NULL;
- perf_irq = dummy_perf;
-
- spin_unlock(&pmc_owner_lock);
-}
-EXPORT_SYMBOL_GPL(release_pmc_hardware);
-
-void power4_enable_pmcs(void)
-{
- unsigned long hid0;
-
- hid0 = mfspr(SPRN_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" (SPRN_HID0), "0" (hid0):
- "memory");
-}