1 /*-
2 * Copyright (c) 2016 Ruslan Bukin <br@bsdpad.com>
3 * All rights reserved.
4 *
5 * Portions of this software were developed by SRI International and the
6 * University of Cambridge Computer Laboratory under DARPA/AFRL contract
7 * FA8750-10-C-0237 ("CTSRD"), as part of the DARPA CRASH research programme.
8 *
9 * Portions of this software were developed by the University of Cambridge
10 * Computer Laboratory as part of the CTSRD Project, with support from the
11 * UK Higher Education Innovation Fund (HEIF).
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 * $FreeBSD$
35 */
36
37 #include <machine/asm.h>
38
39 #define VPECONF0_MVP (1 << 1)
40 #define VPECONF0_VPA (1 << 0)
41
42 .set noreorder
43
44 #ifdef SMP
45 /*
46 * This function must be implemented in assembly because it is called early
47 * in AP boot without a valid stack.
48 */
49 LEAF(platform_processor_id)
50 .set push
51 .set mips32r2
52 mfc0 v0, $15, 1
53 jr ra
54 andi v0, 0x1f
55 .set pop
56 END(platform_processor_id)
57
58 LEAF(malta_cpu_configure)
59 .set push
60 .set mips32r2
61 .set noat
62 li t2, (VPECONF0_MVP | VPECONF0_VPA)
63 move $1, t2
64 jr ra
65 .word 0x41810000 | (1 << 11) | 2 # mttc0 t2, $1, 2
66 .set pop
67 END(malta_cpu_configure)
68
69 /*
70 * Called on APs to wait until they are told to launch.
71 */
72 LEAF(malta_ap_wait)
73 jal platform_processor_id
74 nop
75
76 PTR_LA t1, malta_ap_boot
77
78 1:
79 ll t0, 0(t1)
80 bne v0, t0, 1b
81 nop
82
83 move t0, zero
84 sc t0, 0(t1)
85
86 beqz t0, 1b
87 nop
88
89 j mpentry
90 nop
91 END(malta_ap_wait)
92 #endif
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