Initial file dump from open source releaseHEADmaster

1 files changed, 144 insertions, 0 deletions

diff --git a/arch/mips/netlogic/xlp/wakeup.c b/arch/mips/netlogic/xlp/wakeup.c
new file mode 100644
index 00000000..abb3e08c
--- /dev/null
+++ b/arch/mips/netlogic/xlp/wakeup.c
@@ -0,0 +1,144 @@
+/*
+ * Copyright 2003-2011 NetLogic Microsystems, Inc. (NetLogic). All rights
+ * reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the NetLogic
+ * license below:
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY NETLOGIC ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL NETLOGIC OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/threads.h>
+
+#include <asm/asm.h>
+#include <asm/asm-offsets.h>
+#include <asm/mipsregs.h>
+#include <asm/addrspace.h>
+#include <asm/string.h>
+
+#include <asm/netlogic/haldefs.h>
+#include <asm/netlogic/common.h>
+#include <asm/netlogic/mips-extns.h>
+
+#include <asm/netlogic/xlp-hal/iomap.h>
+#include <asm/netlogic/xlp-hal/pic.h>
+#include <asm/netlogic/xlp-hal/xlp.h>
+#include <asm/netlogic/xlp-hal/sys.h>
+
+static int xlp_wakeup_core(uint64_t sysbase, int node, int core)
+{
+	uint32_t coremask, value;
+	int count;
+
+	coremask = (1 << core);
+
+	/* Enable CPU clock */
+	value = nlm_read_sys_reg(sysbase, SYS_CORE_DFS_DIS_CTRL);
+	value &= ~coremask;
+	nlm_write_sys_reg(sysbase, SYS_CORE_DFS_DIS_CTRL, value);
+
+	/* Remove CPU Reset */
+	value = nlm_read_sys_reg(sysbase, SYS_CPU_RESET);
+	value &= ~coremask;
+	nlm_write_sys_reg(sysbase, SYS_CPU_RESET, value);
+
+	/* Poll for CPU to mark itself coherent */
+	count = 100000;
+	do {
+		value = nlm_read_sys_reg(sysbase, SYS_CPU_NONCOHERENT_MODE);
+	} while ((value & coremask) != 0 && --count > 0);
+
+	return count != 0;
+}
+
+static void xlp_enable_secondary_cores(const cpumask_t *wakeup_mask)
+{
+	struct nlm_soc_info *nodep;
+	uint64_t syspcibase;
+	uint32_t syscoremask;
+	int core, n, cpu, count, val;
+
+	for (n = 0; n < NLM_NR_NODES; n++) {
+		syspcibase = nlm_get_sys_pcibase(n);
+		if (nlm_read_reg(syspcibase, 0) == 0xffffffff)
+			break;
+
+		/* read cores in reset from SYS */
+		if (n != 0)
+			nlm_node_init(n);
+		nodep = nlm_get_node(n);
+		syscoremask = nlm_read_sys_reg(nodep->sysbase, SYS_CPU_RESET);
+		/* The boot cpu */
+		if (n == 0) {
+			syscoremask |= 1;
+			nodep->coremask = 1;
+		}
+
+		for (core = 0; core < NLM_CORES_PER_NODE; core++) {
+			/* we will be on node 0 core 0 */
+			if (n == 0 && core == 0)
+				continue;
+
+			/* see if the core exists */
+			if ((syscoremask & (1 << core)) == 0)
+				continue;
+
+			/* see if at least the first hw thread is enabled */
+			cpu = (n * NLM_CORES_PER_NODE + core)
+						* NLM_THREADS_PER_CORE;
+			if (!cpumask_test_cpu(cpu, wakeup_mask))
+				continue;
+
+			/* wake up the core */
+			if (!xlp_wakeup_core(nodep->sysbase, n, core))
+				continue;
+
+			/* core is up */
+			nodep->coremask |= 1u << core;
+
+			/* spin until the first hw thread sets its ready */
+			count = 0x20000000;
+			do {
+				val = *(volatile int *)&nlm_cpu_ready[cpu];
+			} while (val == 0 && --count > 0);
+		}
+	}
+}
+
+void xlp_wakeup_secondary_cpus()
+{
+	/*
+	 * In case of u-boot, the secondaries are in reset
+	 * first wakeup core 0 threads
+	 */
+	xlp_boot_core0_siblings();
+
+	/* now get other cores out of reset */
+	xlp_enable_secondary_cores(&nlm_cpumask);
+}