mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-24 13:13:57 +08:00
e3978dc7df
This patch adds source files for SPEAr13xx Machines. Signed-off-by: Viresh Kumar <viresh.kumar@st.com> Signed-off-by: Deepak Sikri <deepak.sikri@st.com> Signed-off-by: Shiraz Hashim <shiraz.hashim@st.com>
48 lines
1.1 KiB
ArmAsm
48 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)
|