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>
38 #include <asm/asm-offsets.h>
39 #include <asm/regdef.h>
40 #include <asm/mipsregs.h>
41 #include <asm/stackframe.h>
42 #include <asm/asmmacro.h>
43 #include <asm/addrspace.h>
45 #include <asm/netlogic/common.h>
47 #include <asm/netlogic/xlp-hal/iomap.h>
48 #include <asm/netlogic/xlp-hal/xlp.h>
49 #include <asm/netlogic/xlp-hal/sys.h>
50 #include <asm/netlogic/xlp-hal/cpucontrol.h>
53 #define SYS_CPU_COHERENT_BASE(node) CKSEG1ADDR(XLP_DEFAULT_IO_BASE) + \
54 XLP_IO_SYS_OFFSET(node) + XLP_IO_PCI_HDRSZ + \
55 SYS_CPU_NONCOHERENT_MODE * 4
61 lui t2, 0x4080 /* Enable Unaligned Access, L2HPE */
63 li t2, ~0xe /* S1RCM */
67 li t0, SCHED_DEFEATURE
68 lui t1, 0x0100 /* Experimental: Disable BRU accepting ALU ops */
73 * The cores can come start when they are woken up. This is also the NMI
74 * entry, so check that first.
76 * The data corresponding to reset is stored at RESET_DATA_PHYS location,
77 * this will have the thread mask (used when core is woken up) and the
78 * current NMI handler in case we reached here for an NMI.
80 * When a core or thread is newly woken up, it loops in a 'wait'. When
81 * the CPU really needs waking up, we send an NMI to it, with the NMI
82 * handler set to prom_boot_secondary_cpus
87 .set arch=xlr /* for mfcr/mtcr, XLR is sufficient */
89 FEXPORT(nlm_reset_entry)
95 beqz k1, 1f /* go to real reset entry */
97 li k1, CKSEG1ADDR(RESET_DATA_PHYS) /* NMI */
98 ld k0, BOOT_NMI_HANDLER(k1)
102 1: /* Entry point on core wakeup */
103 mfc0 t0, CP0_EBASE, 1
104 mfc0 t1, CP0_EBASE, 1
106 andi t1, 0x3 /* t1 <- node */
108 mul t3, t2, t1 /* t3 = node * 0x40000 */
110 and t0, t0, 0x7 /* t0 <- core */
113 nor t0, t0, zero /* t0 <- ~(1 << core) */
114 li t2, SYS_CPU_COHERENT_BASE(0)
115 add t2, t2, t3 /* t2 <- SYS offset for node */
120 /* read back to ensure complete */
124 /* Configure LSU on Non-0 Cores. */
128 * Wake up sibling threads from the initial thread in
131 EXPORT(nlm_boot_siblings)
132 li t0, CKSEG1ADDR(RESET_DATA_PHYS)
133 lw t1, BOOT_THREAD_MODE(t0) /* t1 <- thread mode */
134 li t0, ((CPU_BLOCKID_MAP << 8) | MAP_THREADMODE)
140 * The new hardware thread starts at the next instruction
141 * For all the cases other than core 0 thread 0, we will
142 * jump to the secondary wait function.
144 mfc0 v0, CP0_EBASE, 1
145 andi v0, 0x7f /* v0 <- node/core */
148 /* A0 errata - Write MMU_SETUP after changing thread mode register. */
149 andi v1, v0, 0x3 /* v1 <- thread id */
162 /* setup status reg */
172 PTR_LA t1, nlm_cpu_ready
177 /* Wait until NMI hits */
183 * For the boot CPU, we have to restore registers and
186 4: dmfc0 t0, $4, 2 /* restore SP from UserLocal */
188 dmtc0 t1, $4, 2 /* restore SP from UserLocal */
189 PTR_SUBU sp, t0, PT_SIZE
193 EXPORT(nlm_reset_entry_end)
195 FEXPORT(xlp_boot_core0_siblings) /* "Master" cpu starts from here */
197 dmtc0 sp, $4, 2 /* SP saved in UserLocal */
200 /* find the location to which nlm_boot_siblings was relocated */
201 li t0, CKSEG1ADDR(RESET_VEC_PHYS)
202 dla t1, nlm_reset_entry
203 dla t2, nlm_boot_siblings
212 NESTED(nlm_boot_secondary_cpus, 16, sp)
213 PTR_LA t1, nlm_next_sp
215 PTR_LA t1, nlm_next_gp
218 /* a0 has the processor id */
219 PTR_LA t0, nlm_early_init_secondary
223 PTR_LA t0, smp_bootstrap
226 END(nlm_boot_secondary_cpus)
230 * In case of RMIboot bootloader which is used on XLR boards, the CPUs
231 * be already woken up and waiting in bootloader code.
232 * This will get them out of the bootloader code and into linux. Needed
233 * because the bootloader area will be taken and initialized by linux.
236 NESTED(nlm_rmiboot_preboot, 16, sp)
237 mfc0 t0, $15, 1 # read ebase
238 andi t0, 0x1f # t0 has the processor_id()
239 andi t2, t0, 0x3 # thread no
240 sll t0, 2 # offset in cpu array
242 PTR_LA t1, nlm_cpu_ready # mark CPU ready
247 bnez t2, 1f # skip thread programming
248 nop # for non zero hw threads
251 * MMU setup only for first thread in core
255 li t2, 6 # XLR thread mode mask
257 and t2, t1, t2 # t2 - current thread mode
258 li v0, CKSEG1ADDR(RESET_DATA_PHYS)
259 lw v1, BOOT_THREAD_MODE(v0) # v1 - new thread mode
261 beq v1, t2, 1f # same as request value
262 nop # nothing to do */
264 and t2, t1, t3 # mask out old thread mode
265 or t1, t2, v1 # put in new value
266 mtcr t1, t0 # update core control
271 END(nlm_rmiboot_preboot)