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, 134 insertions, 0 deletions

diff --git a/kernel/arch/mips/sgi-ip27/ip27-klconfig.c b/kernel/arch/mips/sgi-ip27/ip27-klconfig.c
new file mode 100644
index 000000000..c873d62ff
--- /dev/null
+++ b/kernel/arch/mips/sgi-ip27/ip27-klconfig.c
@@ -0,0 +1,134 @@
+/*
+ * Copyright (C) 1999, 2000 Ralf Baechle (ralf@gnu.org)
+ * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
+ */
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/interrupt.h>
+#include <linux/kernel_stat.h>
+#include <linux/param.h>
+#include <linux/timex.h>
+#include <linux/mm.h>
+
+#include <asm/sn/klconfig.h>
+#include <asm/sn/arch.h>
+#include <asm/sn/gda.h>
+
+klinfo_t *find_component(lboard_t *brd, klinfo_t *kli, unsigned char struct_type)
+{
+	int index, j;
+
+	if (kli == (klinfo_t *)NULL) {
+		index = 0;
+	} else {
+		for (j = 0; j < KLCF_NUM_COMPS(brd); j++)
+			if (kli == KLCF_COMP(brd, j))
+				break;
+		index = j;
+		if (index == KLCF_NUM_COMPS(brd)) {
+			printk("find_component: Bad pointer: 0x%p\n", kli);
+			return (klinfo_t *)NULL;
+		}
+		index++;		/* next component */
+	}
+
+	for (; index < KLCF_NUM_COMPS(brd); index++) {
+		kli = KLCF_COMP(brd, index);
+		if (KLCF_COMP_TYPE(kli) == struct_type)
+			return kli;
+	}
+
+	/* Didn't find it. */
+	return (klinfo_t *)NULL;
+}
+
+klinfo_t *find_first_component(lboard_t *brd, unsigned char struct_type)
+{
+	return find_component(brd, (klinfo_t *)NULL, struct_type);
+}
+
+lboard_t *find_lboard(lboard_t *start, unsigned char brd_type)
+{
+	/* Search all boards stored on this node. */
+	while (start) {
+		if (start->brd_type == brd_type)
+			return start;
+		start = KLCF_NEXT(start);
+	}
+	/* Didn't find it. */
+	return (lboard_t *)NULL;
+}
+
+lboard_t *find_lboard_class(lboard_t *start, unsigned char brd_type)
+{
+	/* Search all boards stored on this node. */
+	while (start) {
+		if (KLCLASS(start->brd_type) == KLCLASS(brd_type))
+			return start;
+		start = KLCF_NEXT(start);
+	}
+
+	/* Didn't find it. */
+	return (lboard_t *)NULL;
+}
+
+cnodeid_t get_cpu_cnode(cpuid_t cpu)
+{
+	return CPUID_TO_COMPACT_NODEID(cpu);
+}
+
+klcpu_t *nasid_slice_to_cpuinfo(nasid_t nasid, int slice)
+{
+	lboard_t *brd;
+	klcpu_t *acpu;
+
+	if (!(brd = find_lboard((lboard_t *)KL_CONFIG_INFO(nasid), KLTYPE_IP27)))
+		return (klcpu_t *)NULL;
+
+	if (!(acpu = (klcpu_t *)find_first_component(brd, KLSTRUCT_CPU)))
+		return (klcpu_t *)NULL;
+
+	do {
+		if ((acpu->cpu_info.physid) == slice)
+			return acpu;
+	} while ((acpu = (klcpu_t *)find_component(brd, (klinfo_t *)acpu,
+								KLSTRUCT_CPU)));
+	return (klcpu_t *)NULL;
+}
+
+klcpu_t *sn_get_cpuinfo(cpuid_t cpu)
+{
+	nasid_t nasid;
+	int slice;
+	klcpu_t *acpu;
+	gda_t *gdap = GDA;
+	cnodeid_t cnode;
+
+	if (!(cpu < MAXCPUS)) {
+		printk("sn_get_cpuinfo: illegal cpuid 0x%lx\n", cpu);
+		return NULL;
+	}
+
+	cnode = get_cpu_cnode(cpu);
+	if (cnode == INVALID_CNODEID)
+		return NULL;
+
+	if ((nasid = gdap->g_nasidtable[cnode]) == INVALID_NASID)
+		return NULL;
+
+	for (slice = 0; slice < CPUS_PER_NODE; slice++) {
+		acpu = nasid_slice_to_cpuinfo(nasid, slice);
+		if (acpu && acpu->cpu_info.virtid == cpu)
+			return acpu;
+	}
+	return NULL;
+}
+
+int get_cpu_slice(cpuid_t cpu)
+{
+	klcpu_t *acpu;
+
+	if ((acpu = sn_get_cpuinfo(cpu)) == NULL)
+		return -1;
+	return acpu->cpu_info.physid;
+}