50 lines
1.2 KiB
C
50 lines
1.2 KiB
C
/*
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* linux/arch/arm/mach-vexpress/platsmp.c
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*
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* Copyright (C) 2002 ARM Ltd.
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* All Rights Reserved
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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/init.h>
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#include <linux/errno.h>
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#include <linux/smp.h>
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#include <linux/io.h>
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#include <mach/motherboard.h>
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#define V2M_PA_CS7 0x10000000
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#include "core.h"
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extern void versatile_secondary_startup(void);
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/*
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* Initialise the CPU possible map early - this describes the CPUs
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* which may be present or become present in the system.
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*/
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void __init smp_init_cpus(void)
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{
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ct_desc->init_cpu_map();
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}
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void __init platform_smp_prepare_cpus(unsigned int max_cpus)
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{
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/*
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* Initialise the present map, which describes the set of CPUs
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* actually populated at the present time.
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*/
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ct_desc->smp_enable(max_cpus);
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/*
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* Write the address of secondary startup into the
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* system-wide flags register. The boot monitor waits
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* until it receives a soft interrupt, and then the
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* secondary CPU branches to this address.
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*/
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writel(~0, MMIO_P2V(V2M_SYS_FLAGSCLR));
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writel(virt_to_phys(versatile_secondary_startup),
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MMIO_P2V(V2M_SYS_FLAGSSET));
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}
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