1 files changed, 102 insertions, 0 deletions

diff --git a/arch/mips/netlogic/xlp/wakeup.c b/arch/mips/netlogic/xlp/wakeup.c
new file mode 100644
index 000000000000..44d923ff3846
--- /dev/null
+++ b/arch/mips/netlogic/xlp/wakeup.c
@@ -0,0 +1,102 @@
+/*
+ * 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 void xlp_enable_secondary_cores(void)
+{
+        uint32_t core, value, coremask, syscoremask;
+        int count;
+
+        /* read cores in reset from SYS block */
+        syscoremask = nlm_read_sys_reg(nlm_sys_base, SYS_CPU_RESET);
+
+        /* update user specified */
+        nlm_coremask = nlm_coremask & (syscoremask | 1);
+
+        for (core = 1; core < 8; core++) {
+                coremask = 1 << core;
+                if ((nlm_coremask & coremask) == 0)
+                        continue;
+
+                /* Enable CPU clock */
+                value = nlm_read_sys_reg(nlm_sys_base, SYS_CORE_DFS_DIS_CTRL);
+                value &= ~coremask;
+                nlm_write_sys_reg(nlm_sys_base, SYS_CORE_DFS_DIS_CTRL, value);
+
+                /* Remove CPU Reset */
+                value = nlm_read_sys_reg(nlm_sys_base, SYS_CPU_RESET);
+                value &= ~coremask;
+                nlm_write_sys_reg(nlm_sys_base, SYS_CPU_RESET, value);
+
+                /* Poll for CPU to mark itself coherent */
+                count = 100000;
+                do {
+                        value = nlm_read_sys_reg(nlm_sys_base,
+                            SYS_CPU_NONCOHERENT_MODE);
+                } while ((value & coremask) != 0 && count-- > 0);
+
+                if (count == 0)
+                        pr_err("Failed to enable core %d\n", core);
+        }
+}
+
+void xlp_wakeup_secondary_cpus(void)
+{
+        /*
+         * 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();
+}