1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3 * Entry of the second core for CSR Marco dual-core SMP SoCs
4 *
5 * Copyright (c) 2012 Cambridge Silicon Radio Limited, a CSR plc group company.
6 */
7
8 #include <linux/linkage.h>
9 #include <linux/init.h>
10
11 /*
12 * SIRFSOC specific entry point for secondary CPUs. This provides
13 * a "holding pen" into which all secondary cores are held until we're
14 * ready for them to initialise.
15 */
16 ENTRY(sirfsoc_secondary_startup)
17 mrc p15, 0, r0, c0, c0, 5
18 and r0, r0, #15
19 adr r4, 1f
20 ldmia r4, {r5, r6}
21 sub r4, r4, r5
22 add r6, r6, r4
23 pen: ldr r7, [r6]
24 cmp r7, r0
25 bne pen
26
27 /*
28 * we've been released from the holding pen: secondary_stack
29 * should now contain the SVC stack for this core
30 */
31 b secondary_startup
32 ENDPROC(sirfsoc_secondary_startup)
33
34 .align
35 1: .long .
36 .long prima2_pen_release