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, 85 insertions, 0 deletions

diff --git a/kernel/arch/blackfin/mach-common/cache-c.c b/kernel/arch/blackfin/mach-common/cache-c.c
new file mode 100644
index 000000000..f4adedc92
--- /dev/null
+++ b/kernel/arch/blackfin/mach-common/cache-c.c
@@ -0,0 +1,85 @@
+/*
+ * Blackfin cache control code (simpler control-style functions)
+ *
+ * Copyright 2004-2009 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#include <asm/blackfin.h>
+#include <asm/cplbinit.h>
+
+/* Invalidate the Entire Data cache by
+ * clearing DMC[1:0] bits
+ */
+void blackfin_invalidate_entire_dcache(void)
+{
+	u32 dmem = bfin_read_DMEM_CONTROL();
+	bfin_write_DMEM_CONTROL(dmem & ~0xc);
+	SSYNC();
+	bfin_write_DMEM_CONTROL(dmem);
+	SSYNC();
+}
+
+/* Invalidate the Entire Instruction cache by
+ * clearing IMC bit
+ */
+void blackfin_invalidate_entire_icache(void)
+{
+	u32 imem = bfin_read_IMEM_CONTROL();
+	bfin_write_IMEM_CONTROL(imem & ~0x4);
+	SSYNC();
+	bfin_write_IMEM_CONTROL(imem);
+	SSYNC();
+}
+
+#if defined(CONFIG_BFIN_ICACHE) || defined(CONFIG_BFIN_DCACHE)
+
+static void
+bfin_cache_init(struct cplb_entry *cplb_tbl, unsigned long cplb_addr,
+                unsigned long cplb_data, unsigned long mem_control,
+                unsigned long mem_mask)
+{
+	int i;
+#ifdef CONFIG_L1_PARITY_CHECK
+	u32 ctrl;
+
+	if (cplb_addr == DCPLB_ADDR0) {
+		ctrl = bfin_read32(mem_control) | (1 << RDCHK);
+		CSYNC();
+		bfin_write32(mem_control, ctrl);
+		SSYNC();
+	}
+#endif
+
+	for (i = 0; i < MAX_CPLBS; i++) {
+		bfin_write32(cplb_addr + i * 4, cplb_tbl[i].addr);
+		bfin_write32(cplb_data + i * 4, cplb_tbl[i].data);
+	}
+
+	_enable_cplb(mem_control, mem_mask);
+}
+
+#ifdef CONFIG_BFIN_ICACHE
+void bfin_icache_init(struct cplb_entry *icplb_tbl)
+{
+	bfin_cache_init(icplb_tbl, ICPLB_ADDR0, ICPLB_DATA0, IMEM_CONTROL,
+		(IMC | ENICPLB));
+}
+#endif
+
+#ifdef CONFIG_BFIN_DCACHE
+void bfin_dcache_init(struct cplb_entry *dcplb_tbl)
+{
+	/*
+	 *  Anomaly notes:
+	 *  05000287 - We implement workaround #2 - Change the DMEM_CONTROL
+	 *  register, so that the port preferences for DAG0 and DAG1 are set
+	 *  to port B
+	 */
+	bfin_cache_init(dcplb_tbl, DCPLB_ADDR0, DCPLB_DATA0, DMEM_CONTROL,
+		(DMEM_CNTR | PORT_PREF0 | (ANOMALY_05000287 ? PORT_PREF1 : 0)));
+}
+#endif
+
+#endif