headsmp.S
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/*
* SMP support: Entry point for secondary CPUs
*
* Copyright (C) 2012 Marvell
*
* Yehuda Yitschak <yehuday@marvell.com>
* Gregory CLEMENT <gregory.clement@free-electrons.com>
* Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
*
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*
* This file implements the assembly entry point for secondary CPUs in
* an SMP kernel. The only thing we need to do is to add the CPU to
* the coherency fabric by writing to 2 registers. Currently the base
* register addresses are hard coded due to the early initialisation
* problems.
*/
#include <linux/linkage.h>
#include <linux/init.h>
#include <asm/assembler.h>
/*
* Armada XP specific entry point for secondary CPUs.
* We add the CPU to the coherency fabric and then jump to secondary
* startup
*/
ENTRY(armada_xp_secondary_startup)
ARM_BE8(setend be ) @ go BE8 if entered LE
/* Get coherency fabric base physical address */
adr r0, 1f
ldr r1, [r0]
ldr r0, [r0, r1]
/* Read CPU id */
mrc p15, 0, r1, c0, c0, 5
and r1, r1, #0xF
/* Add CPU to coherency fabric */
bl ll_set_cpu_coherent
b secondary_startup
ENDPROC(armada_xp_secondary_startup)
.align 2
1:
.long coherency_phys_base - .