1*4882a593Smuzhiyun/* SPDX-License-Identifier: GPL-2.0-only */ 2*4882a593Smuzhiyun/* 3*4882a593Smuzhiyun * linux/arch/arm/plat-versatile/headsmp.S 4*4882a593Smuzhiyun * 5*4882a593Smuzhiyun * Copyright (c) 2003 ARM Limited 6*4882a593Smuzhiyun * All Rights Reserved 7*4882a593Smuzhiyun */ 8*4882a593Smuzhiyun#include <linux/linkage.h> 9*4882a593Smuzhiyun#include <linux/init.h> 10*4882a593Smuzhiyun#include <asm/assembler.h> 11*4882a593Smuzhiyun 12*4882a593Smuzhiyun/* 13*4882a593Smuzhiyun * Realview/Versatile Express specific entry point for secondary CPUs. 14*4882a593Smuzhiyun * This provides a "holding pen" into which all secondary cores are held 15*4882a593Smuzhiyun * until we're ready for them to initialise. 16*4882a593Smuzhiyun */ 17*4882a593SmuzhiyunENTRY(versatile_secondary_startup) 18*4882a593Smuzhiyun ARM_BE8(setend be) 19*4882a593Smuzhiyun mrc p15, 0, r0, c0, c0, 5 20*4882a593Smuzhiyun bic r0, #0xff000000 21*4882a593Smuzhiyun adr r4, 1f 22*4882a593Smuzhiyun ldmia r4, {r5, r6} 23*4882a593Smuzhiyun sub r4, r4, r5 24*4882a593Smuzhiyun add r6, r6, r4 25*4882a593Smuzhiyunpen: ldr r7, [r6] 26*4882a593Smuzhiyun cmp r7, r0 27*4882a593Smuzhiyun bne pen 28*4882a593Smuzhiyun 29*4882a593Smuzhiyun /* 30*4882a593Smuzhiyun * we've been released from the holding pen: secondary_stack 31*4882a593Smuzhiyun * should now contain the SVC stack for this core 32*4882a593Smuzhiyun */ 33*4882a593Smuzhiyun b secondary_startup 34*4882a593Smuzhiyun 35*4882a593Smuzhiyun .align 36*4882a593Smuzhiyun1: .long . 37*4882a593Smuzhiyun .long versatile_cpu_release 38*4882a593SmuzhiyunENDPROC(versatile_secondary_startup) 39