47 lines
1.3 KiB
ArmAsm
47 lines
1.3 KiB
ArmAsm
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/*
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* Secondary CPU startup routine source file.
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*
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* Copyright (C) 2009 Texas Instruments, Inc.
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*
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* Author:
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* Santosh Shilimkar <santosh.shilimkar@ti.com>
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*
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* Interface functions needed for the SMP. This file is based on arm
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* realview smp platform.
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* Copyright (c) 2003 ARM Limited.
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*
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* This program is free software,you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/linkage.h>
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#include <linux/init.h>
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/* Physical address needed since MMU not enabled yet on secondary core */
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#define OMAP4_AUX_CORE_BOOT1_PA 0x48281804
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__INIT
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/*
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* OMAP4 specific entry point for secondary CPU to jump from ROM
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* code. This routine also provides a holding flag into which
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* secondary core is held until we're ready for it to initialise.
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* The primary core will update the this flag using a hardware
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* register AuxCoreBoot1.
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*/
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ENTRY(omap_secondary_startup)
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mrc p15, 0, r0, c0, c0, 5
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and r0, r0, #0x0f
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hold: ldr r1, =OMAP4_AUX_CORE_BOOT1_PA @ read from AuxCoreBoot1
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ldr r2, [r1]
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cmp r2, r0
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bne hold
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/*
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* we've been released from the cpu_release,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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