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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /arch/mips/netlogic/xlr/wakeup.c
Initial import
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diff --git a/arch/mips/netlogic/xlr/wakeup.c b/arch/mips/netlogic/xlr/wakeup.c
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+/*
+ * 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/delay.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/xlr/iomap.h>
+#include <asm/netlogic/xlr/pic.h>
+
+int xlr_wakeup_secondary_cpus(void)
+{
+ struct nlm_soc_info *nodep;
+ unsigned int i, j, boot_cpu;
+ volatile u32 *cpu_ready = nlm_get_boot_data(BOOT_CPU_READY);
+
+ /*
+ * In case of RMI boot, hit with NMI to get the cores
+ * from bootloader to linux code.
+ */
+ nodep = nlm_get_node(0);
+ boot_cpu = hard_smp_processor_id();
+ nlm_set_nmi_handler(nlm_rmiboot_preboot);
+ for (i = 0; i < NR_CPUS; i++) {
+ if (i == boot_cpu || !cpumask_test_cpu(i, &nlm_cpumask))
+ continue;
+ nlm_pic_send_ipi(nodep->picbase, i, 1, 1); /* send NMI */
+ }
+
+ /* Fill up the coremask early */
+ nodep->coremask = 1;
+ for (i = 1; i < nlm_cores_per_node(); i++) {
+ for (j = 1000000; j > 0; j--) {
+ if (cpu_ready[i * NLM_THREADS_PER_CORE])
+ break;
+ udelay(10);
+ }
+ if (j != 0)
+ nodep->coremask |= (1u << i);
+ else
+ pr_err("Failed to wakeup core %d\n", i);
+ }
+
+ return 0;
+}