linux-stable/arch/arm/mach-spear/headsmp.S
Arnd Bergmann a7ed099ffc ARM: spear: move all files to mach-spear
There are no conflicting files between the three mach-spear* directories
and plat-spear any more, so we can now move all file to a common
mach-spear directory.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
2013-03-12 17:39:47 +01:00

47 lines
1.1 KiB
ArmAsm

/*
* arch/arm/mach-spear13XX/headsmp.S
*
* Picked from realview
* Copyright (c) 2012 ST Microelectronics Limited
* Shiraz Hashim <shiraz.hashim@st.com>
*
* 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>
__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 pen_release
ENDPROC(spear13xx_secondary_startup)