1 /*
2 * Copyright 2003-2011 NetLogic Microsystems, Inc. (NetLogic). All rights
3 * reserved.
4 *
5 * This software is available to you under a choice of one of two
6 * licenses. You may choose to be licensed under the terms of the GNU
7 * General Public License (GPL) Version 2, available from the file
8 * COPYING in the main directory of this source tree, or the NetLogic
9 * license below:
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 *
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in
19 * the documentation and/or other materials provided with the
20 * distribution.
21 *
22 * THIS SOFTWARE IS PROVIDED BY NETLOGIC ``AS IS'' AND ANY EXPRESS OR
23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
24 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL NETLOGIC OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
29 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
30 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
31 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
32 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 */
34
35 #include <linux/delay.h>
36 #include <linux/threads.h>
37
38 #include <asm/asm.h>
39 #include <asm/asm-offsets.h>
40 #include <asm/mipsregs.h>
41 #include <asm/addrspace.h>
42 #include <asm/string.h>
43
44 #include <asm/netlogic/haldefs.h>
45 #include <asm/netlogic/common.h>
46 #include <asm/netlogic/mips-extns.h>
47
48 #include <asm/netlogic/xlr/iomap.h>
49 #include <asm/netlogic/xlr/pic.h>
50
51 int xlr_wakeup_secondary_cpus(void)
52 {
53 struct nlm_soc_info *nodep;
54 unsigned int i, j, boot_cpu;
55 volatile u32 *cpu_ready = nlm_get_boot_data(BOOT_CPU_READY);
56
57 /*
58 * In case of RMI boot, hit with NMI to get the cores
59 * from bootloader to linux code.
60 */
61 nodep = nlm_get_node(0);
62 boot_cpu = hard_smp_processor_id();
63 nlm_set_nmi_handler(nlm_rmiboot_preboot);
64 for (i = 0; i < NR_CPUS; i++) {
65 if (i == boot_cpu || !cpumask_test_cpu(i, &nlm_cpumask))
66 continue;
67 nlm_pic_send_ipi(nodep->picbase, i, 1, 1); /* send NMI */
68 }
69
70 /* Fill up the coremask early */
71 nodep->coremask = 1;
72 for (i = 1; i < nlm_cores_per_node(); i++) {
73 for (j = 1000000; j > 0; j--) {
74 if (cpu_ready[i * NLM_THREADS_PER_CORE])
75 break;
76 udelay(10);
77 }
78 if (j != 0)
79 nodep->coremask |= (1u << i);
80 else
81 pr_err("Failed to wakeup core %d\n", i);
82 }
83
84 return 0;
85 }