M7350/kernel/arch/arm/mach-msm/headsmp.S
2024-09-09 08:52:07 +00:00

43 lines
1.2 KiB
ArmAsm

/*
* Copyright (c) 2003 ARM Limited
* All Rights Reserved
* Copyright (c) 2010, 2012 The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/linkage.h>
#include <linux/init.h>
__CPUINIT
/*
* MSM 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.
*
* This is executing in physical space with cache's off.
*/
ENTRY(msm_secondary_startup)
mrc p15, 0, r0, c0, c0, 5 @ MPIDR
and r0, r0, #15 @ What CPU am I
adr r4, 1f @ address of
ldmia r4, {r5, r6} @ load curr addr and pen_rel addr
sub r4, r4, r5 @ determine virtual/phys offsets
add r6, r6, r4 @ apply
pen:
ldr r7, [r6] @ pen_rel has cpu to remove from reset
cmp r7, r0 @ are we lucky?
bne pen
/*
* we've been released from the holding pen: secondary_stack
* should now contain the SVC stack for this core
*/
b secondary_startup
ENDPROC(msm_secondary_startup)
1: .long .
.long pen_release