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 */
49LEAF(platform_processor_id)
50	.set push
51	.set mips32r2
52	mfc0	v0, $15, 1
53	jr	ra
54	andi	v0, 0x1f
55	.set pop
56END(platform_processor_id)
57
58LEAF(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
67END(malta_cpu_configure)
68
69/*
70 * Called on APs to wait until they are told to launch.
71 */
72LEAF(malta_ap_wait)
73	jal	platform_processor_id
74	nop
75
76	PTR_LA	t1, malta_ap_boot
77
781:
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
91END(malta_ap_wait)
92#endif
93