1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3 * Copyright (c) 2003 ARM Limited
4 * All Rights Reserved
5 */
6 #include <linux/linkage.h>
7 #include <linux/init.h>
8 #include <asm/assembler.h>
9
10 /*
11 * Realview/Versatile Express specific entry point for secondary CPUs.
12 * This provides a "holding pen" into which all secondary cores are held
13 * until we're ready for them to initialise.
14 */
15 ENTRY(versatile_secondary_startup)
16 ARM_BE8(setend be)
17 mrc p15, 0, r0, c0, c0, 5
18 bic r0, #0xff000000
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
33 .align
34 1: .long .
35 .long versatile_cpu_release
36 ENDPROC(versatile_secondary_startup)
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