Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

1 files changed, 211 insertions, 0 deletions

diff --git a/kernel/arch/powerpc/oprofile/op_model_7450.c b/kernel/arch/powerpc/oprofile/op_model_7450.c
new file mode 100644
index 000000000..d29b6e4e5
--- /dev/null
+++ b/kernel/arch/powerpc/oprofile/op_model_7450.c
@@ -0,0 +1,211 @@
+/*
+ * arch/powerpc/oprofile/op_model_7450.c
+ *
+ * Freescale 745x/744x oprofile support, based on fsl_booke support
+ * Copyright (C) 2004 Anton Blanchard <anton@au.ibm.com>, IBM
+ *
+ * Copyright (c) 2004 Freescale Semiconductor, Inc
+ *
+ * Author: Andy Fleming
+ * Maintainer: Kumar Gala <galak@kernel.crashing.org>
+ *
+ * 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/oprofile.h>
+#include <linux/smp.h>
+#include <asm/ptrace.h>
+#include <asm/processor.h>
+#include <asm/cputable.h>
+#include <asm/page.h>
+#include <asm/pmc.h>
+#include <asm/oprofile_impl.h>
+
+static unsigned long reset_value[OP_MAX_COUNTER];
+
+static int oprofile_running;
+static u32 mmcr0_val, mmcr1_val, mmcr2_val, num_pmcs;
+
+#define MMCR0_PMC1_SHIFT	6
+#define MMCR0_PMC2_SHIFT	0
+#define MMCR1_PMC3_SHIFT	27
+#define MMCR1_PMC4_SHIFT	22
+#define MMCR1_PMC5_SHIFT	17
+#define MMCR1_PMC6_SHIFT	11
+
+#define mmcr0_event1(event) \
+	((event << MMCR0_PMC1_SHIFT) & MMCR0_PMC1SEL)
+#define mmcr0_event2(event) \
+	((event << MMCR0_PMC2_SHIFT) & MMCR0_PMC2SEL)
+
+#define mmcr1_event3(event) \
+	((event << MMCR1_PMC3_SHIFT) & MMCR1_PMC3SEL)
+#define mmcr1_event4(event) \
+	((event << MMCR1_PMC4_SHIFT) & MMCR1_PMC4SEL)
+#define mmcr1_event5(event) \
+	((event << MMCR1_PMC5_SHIFT) & MMCR1_PMC5SEL)
+#define mmcr1_event6(event) \
+	((event << MMCR1_PMC6_SHIFT) & MMCR1_PMC6SEL)
+
+#define MMCR0_INIT (MMCR0_FC | MMCR0_FCS | MMCR0_FCP | MMCR0_FCM1 | MMCR0_FCM0)
+
+/* Unfreezes the counters on this CPU, enables the interrupt,
+ * enables the counters to trigger the interrupt, and sets the
+ * counters to only count when the mark bit is not set.
+ */
+static void pmc_start_ctrs(void)
+{
+	u32 mmcr0 = mfspr(SPRN_MMCR0);
+
+	mmcr0 &= ~(MMCR0_FC | MMCR0_FCM0);
+	mmcr0 |= (MMCR0_FCECE | MMCR0_PMC1CE | MMCR0_PMCnCE | MMCR0_PMXE);
+
+	mtspr(SPRN_MMCR0, mmcr0);
+}
+
+/* Disables the counters on this CPU, and freezes them */
+static void pmc_stop_ctrs(void)
+{
+	u32 mmcr0 = mfspr(SPRN_MMCR0);
+
+	mmcr0 |= MMCR0_FC;
+	mmcr0 &= ~(MMCR0_FCECE | MMCR0_PMC1CE | MMCR0_PMCnCE | MMCR0_PMXE);
+
+	mtspr(SPRN_MMCR0, mmcr0);
+}
+
+/* Configures the counters on this CPU based on the global
+ * settings */
+static int fsl7450_cpu_setup(struct op_counter_config *ctr)
+{
+	/* freeze all counters */
+	pmc_stop_ctrs();
+
+	mtspr(SPRN_MMCR0, mmcr0_val);
+	mtspr(SPRN_MMCR1, mmcr1_val);
+	if (num_pmcs > 4)
+		mtspr(SPRN_MMCR2, mmcr2_val);
+
+	return 0;
+}
+
+/* Configures the global settings for the countes on all CPUs. */
+static int fsl7450_reg_setup(struct op_counter_config *ctr,
+			     struct op_system_config *sys,
+			     int num_ctrs)
+{
+	int i;
+
+	num_pmcs = num_ctrs;
+	/* Our counters count up, and "count" refers to
+	 * how much before the next interrupt, and we interrupt
+	 * on overflow.  So we calculate the starting value
+	 * which will give us "count" until overflow.
+	 * Then we set the events on the enabled counters */
+	for (i = 0; i < num_ctrs; ++i)
+		reset_value[i] = 0x80000000UL - ctr[i].count;
+
+	/* Set events for Counters 1 & 2 */
+	mmcr0_val = MMCR0_INIT | mmcr0_event1(ctr[0].event)
+		| mmcr0_event2(ctr[1].event);
+
+	/* Setup user/kernel bits */
+	if (sys->enable_kernel)
+		mmcr0_val &= ~(MMCR0_FCS);
+
+	if (sys->enable_user)
+		mmcr0_val &= ~(MMCR0_FCP);
+
+	/* Set events for Counters 3-6 */
+	mmcr1_val = mmcr1_event3(ctr[2].event)
+		| mmcr1_event4(ctr[3].event);
+	if (num_ctrs > 4)
+		mmcr1_val |= mmcr1_event5(ctr[4].event)
+			| mmcr1_event6(ctr[5].event);
+
+	mmcr2_val = 0;
+
+	return 0;
+}
+
+/* Sets the counters on this CPU to the chosen values, and starts them */
+static int fsl7450_start(struct op_counter_config *ctr)
+{
+	int i;
+
+	mtmsr(mfmsr() | MSR_PMM);
+
+	for (i = 0; i < num_pmcs; ++i) {
+		if (ctr[i].enabled)
+			classic_ctr_write(i, reset_value[i]);
+		else
+			classic_ctr_write(i, 0);
+	}
+
+	/* Clear the freeze bit, and enable the interrupt.
+	 * The counters won't actually start until the rfi clears
+	 * the PMM bit */
+	pmc_start_ctrs();
+
+	oprofile_running = 1;
+
+	return 0;
+}
+
+/* Stop the counters on this CPU */
+static void fsl7450_stop(void)
+{
+	/* freeze counters */
+	pmc_stop_ctrs();
+
+	oprofile_running = 0;
+
+	mb();
+}
+
+
+/* Handle the interrupt on this CPU, and log a sample for each
+ * event that triggered the interrupt */
+static void fsl7450_handle_interrupt(struct pt_regs *regs,
+				    struct op_counter_config *ctr)
+{
+	unsigned long pc;
+	int is_kernel;
+	int val;
+	int i;
+
+	/* set the PMM bit (see comment below) */
+	mtmsr(mfmsr() | MSR_PMM);
+
+	pc = mfspr(SPRN_SIAR);
+	is_kernel = is_kernel_addr(pc);
+
+	for (i = 0; i < num_pmcs; ++i) {
+		val = classic_ctr_read(i);
+		if (val < 0) {
+			if (oprofile_running && ctr[i].enabled) {
+				oprofile_add_ext_sample(pc, regs, i, is_kernel);
+				classic_ctr_write(i, reset_value[i]);
+			} else {
+				classic_ctr_write(i, 0);
+			}
+		}
+	}
+
+	/* The freeze bit was set by the interrupt. */
+	/* Clear the freeze bit, and reenable the interrupt.
+	 * The counters won't actually start until the rfi clears
+	 * the PM/M bit */
+	pmc_start_ctrs();
+}
+
+struct op_powerpc_model op_model_7450= {
+	.reg_setup		= fsl7450_reg_setup,
+	.cpu_setup		= fsl7450_cpu_setup,
+	.start			= fsl7450_start,
+	.stop			= fsl7450_stop,
+	.handle_interrupt	= fsl7450_handle_interrupt,
+};