forked from Minki/linux
80b5efbd43
The current Versatile Express BSP defines the MACHINE_START macro in the core tile code. This patch moves this into the generic board code and introduces a method for determining the current tile at runtime, allowing the Kernel to have support for multiple tiles compiled in. Tile-specific functions are executed via a descriptor struct containing the correct implementations for the current tile. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
52 lines
1.3 KiB
C
52 lines
1.3 KiB
C
/*
|
|
* linux/arch/arm/mach-vexpress/platsmp.c
|
|
*
|
|
* Copyright (C) 2002 ARM Ltd.
|
|
* All Rights Reserved
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
#include <linux/init.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/smp.h>
|
|
#include <linux/io.h>
|
|
|
|
#include <asm/unified.h>
|
|
|
|
#include <mach/motherboard.h>
|
|
#define V2M_PA_CS7 0x10000000
|
|
|
|
#include "core.h"
|
|
|
|
extern void versatile_secondary_startup(void);
|
|
|
|
/*
|
|
* Initialise the CPU possible map early - this describes the CPUs
|
|
* which may be present or become present in the system.
|
|
*/
|
|
void __init smp_init_cpus(void)
|
|
{
|
|
ct_desc->init_cpu_map();
|
|
}
|
|
|
|
void __init platform_smp_prepare_cpus(unsigned int max_cpus)
|
|
{
|
|
/*
|
|
* Initialise the present map, which describes the set of CPUs
|
|
* actually populated at the present time.
|
|
*/
|
|
ct_desc->smp_enable(max_cpus);
|
|
|
|
/*
|
|
* Write the address of secondary startup into the
|
|
* system-wide flags register. The boot monitor waits
|
|
* until it receives a soft interrupt, and then the
|
|
* secondary CPU branches to this address.
|
|
*/
|
|
writel(~0, MMIO_P2V(V2M_SYS_FLAGSCLR));
|
|
writel(BSYM(virt_to_phys(versatile_secondary_startup)),
|
|
MMIO_P2V(V2M_SYS_FLAGSSET));
|
|
}
|