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Viresh Kumare3978dc2012-04-19 22:23:13 +05301/*
2 * arch/arm/mach-spear13XX/headsmp.S
3 *
4 * Picked from realview
5 * Copyright (c) 2012 ST Microelectronics Limited
6 * Shiraz Hashim <shiraz.hashim@st.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12
13#include <linux/linkage.h>
14#include <linux/init.h>
15
16 __INIT
17
18/*
19 * spear13xx specific entry point for secondary CPUs. This provides
20 * a "holding pen" into which all secondary cores are held until we're
21 * ready for them to initialise.
22 */
23ENTRY(spear13xx_secondary_startup)
24 mrc p15, 0, r0, c0, c0, 5
25 and r0, r0, #15
26 adr r4, 1f
27 ldmia r4, {r5, r6}
28 sub r4, r4, r5
29 add r6, r6, r4
30pen: ldr r7, [r6]
31 cmp r7, r0
32 bne pen
33
34 /* re-enable coherency */
35 mrc p15, 0, r0, c1, c0, 1
36 orr r0, r0, #(1 << 6) | (1 << 0)
37 mcr p15, 0, r0, c1, c0, 1
38 /*
39 * we've been released from the holding pen: secondary_stack
40 * should now contain the SVC stack for this core
41 */
42 b secondary_startup
43
44 .align
451: .long .
46 .long pen_release
47ENDPROC(spear13xx_secondary_startup)