perf tools: Streamline bpf examples and headers installation
[linux/fpc-iii.git] / arch / arm / mach-spear / headsmp.S
blobc52192dc3d9f9e3040bf5f5c49c7ce8d644276d6
1 /*
2  * arch/arm/mach-spear13XX/headsmp.S
3  *
4  * Picked from realview
5  * Copyright (c) 2012 ST Microelectronics Limited
6  * Shiraz Hashim <shiraz.linux.kernel@gmail.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  */
13 #include <linux/linkage.h>
14 #include <linux/init.h>
16         __INIT
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  */
23 ENTRY(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
30 pen:    ldr     r7, [r6]
31         cmp     r7, r0
32         bne     pen
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
44         .align
45 1:      .long   .
46         .long   pen_release
47 ENDPROC(spear13xx_secondary_startup)