mptramp.S revision 266385 
1/*-
2 * Copyright 2011 Semihalf
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include <machine/asm.h>
28#include <machine/armreg.h>
29
30__FBSDID("$FreeBSD: stable/10/sys/arm/mv/armadaxp/mptramp.S 266385 2014-05-18 00:30:04Z ian $");
31
32ASENTRY_NP(mptramp)
33	mov	r0, #0
34	mcr	p15, 0, r0, c7, c7, 0
35
36	mrs	r3, cpsr
37	bic	r3, r3, #(PSR_MODE)
38	orr	r3, r3, #(PSR_SVC32_MODE)
39        msr	cpsr_fsxc, r3
40
41	mrc	p15, 0, r0, c0, c0, 5
42	and	r0, #0x0f		/* Get CPU ID */
43
44	/* Read boot address for CPU */
45	mov	r1, #0x100
46	mul	r2, r0, r1
47	ldr	r1, Lpmureg
48	add	r0, r2, r1
49	ldr	r1, [r0], #0x00
50
51	mov pc, r1
52
53Lpmureg:
54        .word   0xd0022124
55END(mptramp)
56
57