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2 * Copyright 2003-2011 NetLogic Microsystems, Inc. (NetLogic). All rights
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
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
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
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.
35 #include <linux/init.h>
36 #include <linux/kernel.h>
37 #include <linux/threads.h>
40 #include <asm/asm-offsets.h>
41 #include <asm/mipsregs.h>
42 #include <asm/addrspace.h>
43 #include <asm/string.h>
45 #include <asm/netlogic/haldefs.h>
46 #include <asm/netlogic/common.h>
47 #include <asm/netlogic/mips-extns.h>
49 #include <asm/netlogic/xlp-hal/iomap.h>
50 #include <asm/netlogic/xlp-hal/pic.h>
51 #include <asm/netlogic/xlp-hal/xlp.h>
52 #include <asm/netlogic/xlp-hal/sys.h>
54 static int xlp_wakeup_core(uint64_t sysbase
, int node
, int core
)
56 uint32_t coremask
, value
;
59 coremask
= (1 << core
);
61 /* Enable CPU clock */
62 value
= nlm_read_sys_reg(sysbase
, SYS_CORE_DFS_DIS_CTRL
);
64 nlm_write_sys_reg(sysbase
, SYS_CORE_DFS_DIS_CTRL
, value
);
66 /* Remove CPU Reset */
67 value
= nlm_read_sys_reg(sysbase
, SYS_CPU_RESET
);
69 nlm_write_sys_reg(sysbase
, SYS_CPU_RESET
, value
);
71 /* Poll for CPU to mark itself coherent */
74 value
= nlm_read_sys_reg(sysbase
, SYS_CPU_NONCOHERENT_MODE
);
75 } while ((value
& coremask
) != 0 && --count
> 0);
80 static void xlp_enable_secondary_cores(const cpumask_t
*wakeup_mask
)
82 struct nlm_soc_info
*nodep
;
85 int core
, n
, cpu
, count
, val
;
87 for (n
= 0; n
< NLM_NR_NODES
; n
++) {
88 syspcibase
= nlm_get_sys_pcibase(n
);
89 if (nlm_read_reg(syspcibase
, 0) == 0xffffffff)
92 /* read cores in reset from SYS */
95 nodep
= nlm_get_node(n
);
96 syscoremask
= nlm_read_sys_reg(nodep
->sysbase
, SYS_CPU_RESET
);
103 for (core
= 0; core
< NLM_CORES_PER_NODE
; core
++) {
104 /* we will be on node 0 core 0 */
105 if (n
== 0 && core
== 0)
108 /* see if the core exists */
109 if ((syscoremask
& (1 << core
)) == 0)
112 /* see if at least the first hw thread is enabled */
113 cpu
= (n
* NLM_CORES_PER_NODE
+ core
)
114 * NLM_THREADS_PER_CORE
;
115 if (!cpumask_test_cpu(cpu
, wakeup_mask
))
118 /* wake up the core */
119 if (!xlp_wakeup_core(nodep
->sysbase
, n
, core
))
123 nodep
->coremask
|= 1u << core
;
125 /* spin until the first hw thread sets its ready */
128 val
= *(volatile int *)&nlm_cpu_ready
[cpu
];
129 } while (val
== 0 && --count
> 0);
134 void xlp_wakeup_secondary_cpus()
137 * In case of u-boot, the secondaries are in reset
138 * first wakeup core 0 threads
140 xlp_boot_core0_siblings();
142 /* now get other cores out of reset */
143 xlp_enable_secondary_cores(&nlm_cpumask
);