1b2bc75c1b
Each platform has to add support for CPU hotplugging itself by providing suitable definitions for the cpu_disable and cpu_die of the smp_ops methods and setting SYS_SUPPORTS_HOTPLUG_CPU. A platform should only set SYS_SUPPORTS_HOTPLUG_CPU once all it's smp_ops definitions have the necessary changes. This patch contains the changes to the dummy smp_ops definition for uni-processor systems. Parts of the code contributed by Cavium Inc. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
84 lines
1.6 KiB
C
84 lines
1.6 KiB
C
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 2006, 07 by Ralf Baechle (ralf@linux-mips.org)
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*
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* Symmetric Uniprocessor (TM) Support
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*/
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#include <linux/kernel.h>
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#include <linux/sched.h>
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/*
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* Send inter-processor interrupt
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*/
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static void up_send_ipi_single(int cpu, unsigned int action)
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{
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panic(KERN_ERR "%s called", __func__);
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}
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static inline void up_send_ipi_mask(cpumask_t mask, unsigned int action)
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{
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panic(KERN_ERR "%s called", __func__);
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}
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/*
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* After we've done initial boot, this function is called to allow the
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* board code to clean up state, if needed
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*/
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static void __cpuinit up_init_secondary(void)
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{
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}
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static void __cpuinit up_smp_finish(void)
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{
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}
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/* Hook for after all CPUs are online */
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static void up_cpus_done(void)
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{
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}
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/*
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* Firmware CPU startup hook
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*/
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static void __cpuinit up_boot_secondary(int cpu, struct task_struct *idle)
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{
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}
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static void __init up_smp_setup(void)
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{
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}
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static void __init up_prepare_cpus(unsigned int max_cpus)
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{
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}
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#ifdef CONFIG_HOTPLUG_CPU
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static int up_cpu_disable(void)
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{
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return -ENOSYS;
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}
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static void up_cpu_die(unsigned int cpu)
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{
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BUG();
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}
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#endif
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struct plat_smp_ops up_smp_ops = {
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.send_ipi_single = up_send_ipi_single,
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.send_ipi_mask = up_send_ipi_mask,
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.init_secondary = up_init_secondary,
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.smp_finish = up_smp_finish,
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.cpus_done = up_cpus_done,
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.boot_secondary = up_boot_secondary,
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.smp_setup = up_smp_setup,
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.prepare_cpus = up_prepare_cpus,
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#ifdef CONFIG_HOTPLUG_CPU
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.cpu_disable = up_cpu_disable,
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.cpu_die = up_cpu_die,
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#endif
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};
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