linux/arch/arm/mach-spear/headsmp.S
Thomas Gleixner d2912cb15b treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
Based on 2 normalized pattern(s):

  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

  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 #

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 4122 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Enrico Weigelt <info@metux.net>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-06-19 17:09:55 +02:00

45 lines
978 B
ArmAsm

/* SPDX-License-Identifier: GPL-2.0-only */
/*
* arch/arm/mach-spear13XX/headsmp.S
*
* Picked from realview
* Copyright (c) 2012 ST Microelectronics Limited
* Shiraz Hashim <shiraz.linux.kernel@gmail.com>
*/
#include <linux/linkage.h>
#include <linux/init.h>
__INIT
/*
* spear13xx 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(spear13xx_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
/* re-enable coherency */
mrc p15, 0, r0, c1, c0, 1
orr r0, r0, #(1 << 6) | (1 << 0)
mcr p15, 0, r0, c1, c0, 1
/*
* 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 spear_pen_release
ENDPROC(spear13xx_secondary_startup)