forked from luck/tmp_suning_uos_patched
d595d423d0
Allow the boot_secondary SMP op to return an error to __cpu_up(), which will in turn return it to its caller. This will allow SMP implementations to return errors quickly in cases they they know have failed, rather than relying upon __cpu_up() eventually timing out waiting for the cpu_running completion. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/17014/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
80 lines
1.5 KiB
C
80 lines
1.5 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(const struct cpumask *mask,
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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 up_init_secondary(void)
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{
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}
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static void up_smp_finish(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 int up_boot_secondary(int cpu, struct task_struct *idle)
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{
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return 0;
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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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const 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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.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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