| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* |
| * linux/arch/arm/plat-versatile/headsmp.S |
| * |
| * Copyright (c) 2003 ARM Limited |
| * All Rights Reserved |
| */ |
| #include <linux/linkage.h> |
| #include <linux/init.h> |
| #include <asm/assembler.h> |
| |
| /* |
| * Realview/Versatile Express specific entry point for secondary CPUs. |
| * This provides a "holding pen" into which all secondary cores are held |
| * until we're ready for them to initialise. |
| */ |
| ENTRY(versatile_secondary_startup) |
| ARM_BE8(setend be) |
| mrc p15, 0, r0, c0, c0, 5 |
| bic r0, #0xff000000 |
| adr r4, 1f |
| ldmia r4, {r5, r6} |
| sub r4, r4, r5 |
| add r6, r6, r4 |
| pen: ldr r7, [r6] |
| cmp r7, r0 |
| bne pen |
| |
| /* |
| * we've been released from the holding pen: secondary_stack |
| * should now contain the SVC stack for this core |
| */ |
| b secondary_startup |
| |
| .align |
| 1: .long . |
| .long versatile_cpu_release |
| ENDPROC(versatile_secondary_startup) |
