1*4882a593Smuzhiyun/* SPDX-License-Identifier: GPL-2.0-or-later */ 2*4882a593Smuzhiyun/* 3*4882a593Smuzhiyun * Entry of the second core for CSR Marco dual-core SMP SoCs 4*4882a593Smuzhiyun * 5*4882a593Smuzhiyun * Copyright (c) 2012 Cambridge Silicon Radio Limited, a CSR plc group company. 6*4882a593Smuzhiyun */ 7*4882a593Smuzhiyun 8*4882a593Smuzhiyun#include <linux/linkage.h> 9*4882a593Smuzhiyun#include <linux/init.h> 10*4882a593Smuzhiyun 11*4882a593Smuzhiyun/* 12*4882a593Smuzhiyun * SIRFSOC specific entry point for secondary CPUs. This provides 13*4882a593Smuzhiyun * a "holding pen" into which all secondary cores are held until we're 14*4882a593Smuzhiyun * ready for them to initialise. 15*4882a593Smuzhiyun */ 16*4882a593SmuzhiyunENTRY(sirfsoc_secondary_startup) 17*4882a593Smuzhiyun mrc p15, 0, r0, c0, c0, 5 18*4882a593Smuzhiyun and r0, r0, #15 19*4882a593Smuzhiyun adr r4, 1f 20*4882a593Smuzhiyun ldmia r4, {r5, r6} 21*4882a593Smuzhiyun sub r4, r4, r5 22*4882a593Smuzhiyun add r6, r6, r4 23*4882a593Smuzhiyunpen: ldr r7, [r6] 24*4882a593Smuzhiyun cmp r7, r0 25*4882a593Smuzhiyun bne pen 26*4882a593Smuzhiyun 27*4882a593Smuzhiyun /* 28*4882a593Smuzhiyun * we've been released from the holding pen: secondary_stack 29*4882a593Smuzhiyun * should now contain the SVC stack for this core 30*4882a593Smuzhiyun */ 31*4882a593Smuzhiyun b secondary_startup 32*4882a593SmuzhiyunENDPROC(sirfsoc_secondary_startup) 33*4882a593Smuzhiyun 34*4882a593Smuzhiyun .align 35*4882a593Smuzhiyun1: .long . 36*4882a593Smuzhiyun .long prima2_pen_release 37