2019-06-04 16:11:33 +08:00
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/* SPDX-License-Identifier: GPL-2.0-only */
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2010-02-12 05:56:07 +08:00
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/*
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2011-01-19 18:24:56 +08:00
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* linux/arch/arm/plat-versatile/headsmp.S
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2010-02-12 05:56:07 +08:00
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*
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* Copyright (c) 2003 ARM Limited
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* All Rights Reserved
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*/
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#include <linux/linkage.h>
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#include <linux/init.h>
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2013-05-29 04:34:50 +08:00
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#include <asm/assembler.h>
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2010-02-12 05:56:07 +08:00
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/*
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2011-01-19 18:24:56 +08:00
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* Realview/Versatile Express specific entry point for secondary CPUs.
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* This provides a "holding pen" into which all secondary cores are held
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2010-02-12 05:56:07 +08:00
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* until we're ready for them to initialise.
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*/
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2011-01-19 18:24:56 +08:00
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ENTRY(versatile_secondary_startup)
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2013-05-29 04:34:50 +08:00
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ARM_BE8(setend be)
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2010-02-12 05:56:07 +08:00
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mrc p15, 0, r0, c0, c0, 5
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2013-01-22 18:56:40 +08:00
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bic r0, #0xff000000
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2010-02-12 05:56:07 +08:00
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adr r4, 1f
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ldmia r4, {r5, r6}
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sub r4, r4, r5
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add r6, r6, r4
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pen: ldr r7, [r6]
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cmp r7, r0
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bne pen
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/*
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* we've been released from the holding pen: secondary_stack
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* should now contain the SVC stack for this core
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*/
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b secondary_startup
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2010-11-30 20:05:10 +08:00
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.align
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2010-02-12 05:56:07 +08:00
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1: .long .
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2018-12-13 20:54:26 +08:00
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.long versatile_cpu_release
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2011-12-15 22:02:33 +08:00
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ENDPROC(versatile_secondary_startup)
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