37 lines
821 B
ArmAsm
37 lines
821 B
ArmAsm
|
/* SPDX-License-Identifier: GPL-2.0-only */
|
||
|
|
/*
|
||
|
|
* Copyright (c) 2003 ARM Limited
|
||
|
|
* All Rights Reserved
|
||
|
|
*/
|
||
|
|
#include <linux/linkage.h>
|
||
|
|
#include <linux/init.h>
|
||
|
|
#include <asm/assembler.h>
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Realview/Versatile Express 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(versatile_secondary_startup)
|
||
|
|
ARM_BE8(setend be)
|
||
|
|
mrc p15, 0, r0, c0, c0, 5
|
||
|
|
bic r0, #0xff000000
|
||
|
|
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
|
||
|
|
|
||
|
|
.align
|
||
|
|
1: .long .
|
||
|
|
.long versatile_cpu_release
|
||
|
|
ENDPROC(versatile_secondary_startup)
|