2012-06-02 00:21:46 +08:00
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/*
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* Core functions for Marvell System On Chip
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*
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* Copyright (C) 2012 Marvell
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*
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* Lior Amsalem <alior@marvell.com>
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* Gregory CLEMENT <gregory.clement@free-electrons.com>
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* Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
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*
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* This file is licensed under the terms of the GNU General Public
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* License version 2. This program is licensed "as is" without any
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* warranty of any kind, whether express or implied.
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*/
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#ifndef __ARCH_MVEBU_COMMON_H
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#define __ARCH_MVEBU_COMMON_H
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arm: mvebu: remove dependency of SMP init on static I/O mapping
The ->smp_init_cpus() function is called very early during boot, at a
point where dynamic I/O mappings are not yet possible. However, in the
Armada 370/XP implementation of this function, we have to get the
number of CPUs. We used to do that by accessing a hardware register,
which requires relying on a static I/O mapping set up by
->map_io(). Not only this requires hardcoding a virtual address, but
it also prevents us from removing the static I/O mapping.
So this commit changes the way used to get the number of CPUs: we now
use the Device Tree, which is a representation of the hardware, and
provides us the number of available CPUs. This is also more accurate,
because it potentially allows to boot the Linux kernel on only a
number of CPUs given by the Device Tree, instead of unconditionally on
all CPUs.
As a consequence, the coherency_get_cpu_count() function becomes no
longer used, so we remove it.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
2013-06-05 15:04:54 +08:00
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#define ARMADA_XP_MAX_CPUS 4
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2013-07-09 07:01:40 +08:00
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#include <linux/reboot.h>
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void mvebu_restart(enum reboot_mode mode, const char *cmd);
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2012-06-02 00:21:46 +08:00
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2012-06-14 01:01:28 +08:00
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void armada_370_xp_init_irq(void);
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void armada_370_xp_handle_irq(struct pt_regs *regs);
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2012-11-15 05:51:08 +08:00
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void armada_xp_cpu_die(unsigned int cpu);
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2012-08-02 16:16:29 +08:00
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int armada_370_xp_coherency_init(void);
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2012-08-02 16:17:51 +08:00
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int armada_370_xp_pmsu_init(void);
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2012-11-15 05:51:08 +08:00
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void armada_xp_secondary_startup(void);
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extern struct smp_operations armada_xp_smp_ops;
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2012-06-02 00:21:46 +08:00
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#endif
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