[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>

10 files changed, 33 insertions, 110 deletions

diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile
index b347ac3..6b0f176 100644
--- a/arch/powerpc/kernel/Makefile
+++ b/arch/powerpc/kernel/Makefile
@@ -11,7 +11,7 @@ CFLAGS_btext.o		+= -fPIC
 endif
 
 obj-y				:= semaphore.o cputable.o ptrace.o syscalls.o \
-				   signal_32.o
+				   signal_32.o pmc.o
 obj-$(CONFIG_PPC64)		+= binfmt_elf32.o sys_ppc32.o ptrace32.o
 obj-$(CONFIG_ALTIVEC)		+= vecemu.o vector.o
 obj-$(CONFIG_POWER4)		+= idle_power4.o
diff --git a/arch/ppc64/kernel/pmc.c b/arch/powerpc/kernel/pmc.c
index 944d7df..2d333cc 100644
--- a/arch/ppc64/kernel/pmc.c
+++ b/arch/powerpc/kernel/pmc.c
@@ -1,7 +1,10 @@
 /*
- *  linux/arch/ppc64/kernel/pmc.c
+ *  arch/powerpc/kernel/pmc.c
  *
  *  Copyright (C) 2004 David Gibson, IBM Corporation.
+ *  Includes code formerly from arch/ppc/kernel/perfmon.c:
+ *    Author: Andy Fleming
+ *    Copyright (c) 2004 Freescale Semiconductor, Inc
  *
  *  This program is free software; you can redistribute it and/or
  *  modify it under the terms of the GNU General Public License
@@ -17,6 +20,20 @@
 #include <asm/processor.h>
 #include <asm/pmc.h>
 
+#if defined(CONFIG_FSL_BOOKE) && !defined(CONFIG_E200)
+static void dummy_perf(struct pt_regs *regs)
+{
+	unsigned int pmgc0 = mfpmr(PMRN_PMGC0);
+
+	pmgc0 &= ~PMGC0_PMIE;
+	mtpmr(PMRN_PMGC0, pmgc0);
+}
+#elif defined(CONFIG_PPC64) || defined(CONFIG_6xx)
+
+#ifndef MMCR0_PMAO
+#define MMCR0_PMAO	0
+#endif
+
 /* Ensure exceptions are disabled */
 static void dummy_perf(struct pt_regs *regs)
 {
@@ -25,6 +42,11 @@ static void dummy_perf(struct pt_regs *regs)
 	mmcr0 &= ~(MMCR0_PMXE|MMCR0_PMAO);
 	mtspr(SPRN_MMCR0, mmcr0);
 }
+#else
+static void dummy_perf(struct pt_regs *regs)
+{
+}
+#endif
 
 static DEFINE_SPINLOCK(pmc_owner_lock);
 static void *pmc_owner_caller; /* mostly for debugging */
@@ -66,6 +88,7 @@ void release_pmc_hardware(void)
 }
 EXPORT_SYMBOL_GPL(release_pmc_hardware);
 
+#ifdef CONFIG_PPC64
 void power4_enable_pmcs(void)
 {
 	unsigned long hid0;
@@ -86,3 +109,4 @@ void power4_enable_pmcs(void)
 		"isync" : "=&r" (hid0) : "i" (SPRN_HID0), "0" (hid0):
 		"memory");
 }
+#endif /* CONFIG_PPC64 */
diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index 6a881e3..f875803 100644
--- a/arch/powerpc/kernel/traps.c
+++ b/arch/powerpc/kernel/traps.c
@@ -40,9 +40,9 @@
 #include <asm/machdep.h>
 #include <asm/rtas.h>
 #include <asm/xmon.h>
+#include <asm/pmc.h>
 #ifdef CONFIG_PPC32
 #include <asm/reg.h>
-#include <asm/perfmon.h>
 #endif
 #ifdef CONFIG_PMAC_BACKLIGHT
 #include <asm/backlight.h>
@@ -51,7 +51,6 @@
 #include <asm/firmware.h>
 #include <asm/processor.h>
 #include <asm/systemcfg.h>
-#include <asm/pmc.h>
 #endif
 
 #ifdef CONFIG_PPC64	/* XXX */
diff --git a/arch/powerpc/oprofile/common.c b/arch/powerpc/oprofile/common.c
index 0ec12c8..af2c05d 100644
--- a/arch/powerpc/oprofile/common.c
+++ b/arch/powerpc/oprofile/common.c
@@ -22,11 +22,7 @@
 #include <linux/errno.h>
 #include <asm/ptrace.h>
 #include <asm/system.h>
-#ifdef __powerpc64__
 #include <asm/pmc.h>
-#else /* __powerpc64__ */
-#include <asm/perfmon.h>
-#endif /* __powerpc64__ */
 #include <asm/cputable.h>
 #include <asm/oprofile_impl.h>
 
diff --git a/arch/powerpc/oprofile/op_model_fsl_booke.c b/arch/powerpc/oprofile/op_model_fsl_booke.c
index 1917f8d..86124a9 100644
--- a/arch/powerpc/oprofile/op_model_fsl_booke.c
+++ b/arch/powerpc/oprofile/op_model_fsl_booke.c
@@ -24,7 +24,7 @@
 #include <asm/cputable.h>
 #include <asm/reg_booke.h>
 #include <asm/page.h>
-#include <asm/perfmon.h>
+#include <asm/pmc.h>
 #include <asm/oprofile_impl.h>
 
 static unsigned long reset_value[OP_MAX_COUNTER];
diff --git a/arch/ppc/kernel/Makefile b/arch/ppc/kernel/Makefile
index ccbc442..b35346d 100644
--- a/arch/ppc/kernel/Makefile
+++ b/arch/ppc/kernel/Makefile
@@ -15,7 +15,7 @@ extra-y				+= vmlinux.lds
 obj-y				:= entry.o traps.o irq.o idle.o time.o misc.o \
 					process.o align.o \
 					setup.o \
-					ppc_htab.o perfmon.o
+					ppc_htab.o
 obj-$(CONFIG_6xx)		+= l2cr.o cpu_setup_6xx.o
 obj-$(CONFIG_SOFTWARE_SUSPEND)	+= swsusp.o
 obj-$(CONFIG_POWER4)		+= cpu_setup_power4.o
@@ -38,7 +38,7 @@ endif
 
 else
 obj-y				:= irq.o idle.o \
-					align.o perfmon.o
+					align.o
 obj-$(CONFIG_6xx)		+= l2cr.o cpu_setup_6xx.o
 obj-$(CONFIG_SOFTWARE_SUSPEND)	+= swsusp.o
 obj-$(CONFIG_MODULES)		+= module.o
diff --git a/arch/ppc/kernel/perfmon.c b/arch/ppc/kernel/perfmon.c
deleted file mode 100644
index c9a38dd..0000000
--- a/arch/ppc/kernel/perfmon.c
+++ /dev/null
@@ -1,96 +0,0 @@
-/* kernel/perfmon.c
- * PPC 32 Performance Monitor Infrastructure
- *
- * Author: Andy Fleming
- * Copyright (c) 2004 Freescale Semiconductor, Inc
- *
- *  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/errno.h>
-#include <linux/sched.h>
-#include <linux/kernel.h>
-#include <linux/mm.h>
-#include <linux/stddef.h>
-#include <linux/unistd.h>
-#include <linux/ptrace.h>
-#include <linux/slab.h>
-#include <linux/user.h>
-#include <linux/a.out.h>
-#include <linux/interrupt.h>
-#include <linux/config.h>
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/prctl.h>
-
-#include <asm/pgtable.h>
-#include <asm/uaccess.h>
-#include <asm/system.h>
-#include <asm/io.h>
-#include <asm/reg.h>
-#include <asm/xmon.h>
-
-/* A lock to regulate grabbing the interrupt */
-DEFINE_SPINLOCK(perfmon_lock);
-
-#if defined (CONFIG_FSL_BOOKE) && !defined (CONFIG_E200)
-static void dummy_perf(struct pt_regs *regs)
-{
-	unsigned int pmgc0 = mfpmr(PMRN_PMGC0);
-
-	pmgc0 &= ~PMGC0_PMIE;
-	mtpmr(PMRN_PMGC0, pmgc0);
-}
-
-#elif defined(CONFIG_6xx)
-/* Ensure exceptions are disabled */
-static void dummy_perf(struct pt_regs *regs)
-{
-	unsigned int mmcr0 = mfspr(SPRN_MMCR0);
-
-	mmcr0 &= ~MMCR0_PMXE;
-	mtspr(SPRN_MMCR0, mmcr0);
-}
-#else
-static void dummy_perf(struct pt_regs *regs)
-{
-}
-#endif
-
-void (*perf_irq)(struct pt_regs *) = dummy_perf;
-
-/* Grab the interrupt, if it's free.
- * Returns 0 on success, -1 if the interrupt is taken already */
-int reserve_pmc_hardware(void (*handler)(struct pt_regs *))
-{
-	int err = 0;
-
-	spin_lock(&perfmon_lock);
-
-	if (perf_irq == dummy_perf)
-		perf_irq = handler;
-	else {
-		pr_info("perfmon irq already handled by %p\n", perf_irq);
-		err = -EBUSY;
-	}
-
-	spin_unlock(&perfmon_lock);
-
-	return err;
-}
-
-void release_pmc_hardware(void)
-{
-	spin_lock(&perfmon_lock);
-
-	perf_irq = dummy_perf;
-
-	spin_unlock(&perfmon_lock);
-}
-
-EXPORT_SYMBOL(perf_irq);
-EXPORT_SYMBOL(reserve_pmc_hardware);
-EXPORT_SYMBOL(release_pmc_hardware);
diff --git a/arch/ppc/kernel/perfmon_fsl_booke.c b/arch/ppc/kernel/perfmon_fsl_booke.c
index 03526bf..32455df 100644
--- a/arch/ppc/kernel/perfmon_fsl_booke.c
+++ b/arch/ppc/kernel/perfmon_fsl_booke.c
@@ -32,7 +32,7 @@
 #include <asm/io.h>
 #include <asm/reg.h>
 #include <asm/xmon.h>
-#include <asm/perfmon.h>
+#include <asm/pmc.h>
 
 static inline u32 get_pmlca(int ctr);
 static inline void set_pmlca(int ctr, u32 pmlca);
diff --git a/arch/ppc/kernel/traps.c b/arch/ppc/kernel/traps.c
index 3145e97..5e4bf88 100644
--- a/arch/ppc/kernel/traps.c
+++ b/arch/ppc/kernel/traps.c
@@ -41,7 +41,7 @@
 #ifdef CONFIG_PMAC_BACKLIGHT
 #include <asm/backlight.h>
 #endif
-#include <asm/perfmon.h>
+#include <asm/pmc.h>
 
 #ifdef CONFIG_XMON
 extern int xmon_bpt(struct pt_regs *regs);
diff --git a/arch/ppc64/kernel/Makefile b/arch/ppc64/kernel/Makefile
index 18f477f..6cce419 100644
--- a/arch/ppc64/kernel/Makefile
+++ b/arch/ppc64/kernel/Makefile
@@ -17,7 +17,7 @@ obj-y               +=	irq.o idle.o dma.o \
 			udbg.o ioctl32.o \
 			rtc.o \
 			cpu_setup_power4.o \
-			iommu.o sysfs.o vdso.o pmc.o firmware.o
+			iommu.o sysfs.o vdso.o firmware.o
 obj-y += vdso32/ vdso64/
 
 pci-obj-$(CONFIG_PPC_MULTIPLATFORM)	+= pci_dn.o pci_direct_iommu.o