1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | /* |
3 | * Cloned from linux/arch/arm/mach-realview/headsmp.S |
4 | * |
5 | * Copyright (c) 2003 ARM Limited |
6 | * All Rights Reserved |
7 | */ |
8 | #include <linux/linkage.h> |
9 | #include <linux/init.h> |
10 | |
11 | #include <asm/assembler.h> |
12 | |
13 | /* |
14 | * exynos4 specific entry point for secondary CPUs. This provides |
15 | * a "holding pen" into which all secondary cores are held until we're |
16 | * ready for them to initialise. |
17 | */ |
18 | ENTRY(exynos4_secondary_startup) |
19 | ARM_BE8(setend be) |
20 | mrc p15, 0, r0, c0, c0, 5 |
21 | and r0, r0, #15 |
22 | adr r4, 1f |
23 | ldmia r4, {r5, r6} |
24 | sub r4, r4, r5 |
25 | add r6, r6, r4 |
26 | pen: ldr r7, [r6] |
27 | cmp r7, r0 |
28 | bne pen |
29 | |
30 | /* |
31 | * we've been released from the holding pen: secondary_stack |
32 | * should now contain the SVC stack for this core |
33 | */ |
34 | b secondary_startup |
35 | ENDPROC(exynos4_secondary_startup) |
36 | |
37 | .align 2 |
38 | 1: .long . |
39 | .long exynos_pen_release |
40 | |