openwrtv4/target/linux/cns3xxx/files/arch/arm/mach-cns3xxx/headsmp.S
Felix Fietkau 136747c564 cns3xxx: clean up SMP related code
Signed-off-by: Felix Fietkau <nbd@openwrt.org>

SVN-Revision: 48332
2016-01-18 22:38:09 +00:00

41 lines
990 B
ArmAsm

/*
* linux/arch/arm/mach-cns3xxx/headsmp.S
*
* Cloned from linux/arch/arm/plat-versatile/headsmp.S
*
* Copyright (c) 2003 ARM Limited
* 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>
/*
* CNS3XXX 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(cns3xxx_secondary_startup)
mrc p15, 0, r0, c0, c0, 5
and r0, r0, #15
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
ENDPROC(cns3xxx_secondary_startup)
.align 2
1: .long .
.long pen_release