mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-27 11:19:37 +00:00
![Paul Burton](/assets/img/avatar_default.png)
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>
79 lines
1.5 KiB
C
79 lines
1.5 KiB
C
/*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*
|
|
* Copyright (C) 2006, 07 by Ralf Baechle (ralf@linux-mips.org)
|
|
*
|
|
* Symmetric Uniprocessor (TM) Support
|
|
*/
|
|
#include <linux/kernel.h>
|
|
#include <linux/sched.h>
|
|
|
|
/*
|
|
* Send inter-processor interrupt
|
|
*/
|
|
static void up_send_ipi_single(int cpu, unsigned int action)
|
|
{
|
|
panic(KERN_ERR "%s called", __func__);
|
|
}
|
|
|
|
static inline void up_send_ipi_mask(const struct cpumask *mask,
|
|
unsigned int action)
|
|
{
|
|
panic(KERN_ERR "%s called", __func__);
|
|
}
|
|
|
|
/*
|
|
* After we've done initial boot, this function is called to allow the
|
|
* board code to clean up state, if needed
|
|
*/
|
|
static void up_init_secondary(void)
|
|
{
|
|
}
|
|
|
|
static void up_smp_finish(void)
|
|
{
|
|
}
|
|
|
|
/*
|
|
* Firmware CPU startup hook
|
|
*/
|
|
static int up_boot_secondary(int cpu, struct task_struct *idle)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static void __init up_smp_setup(void)
|
|
{
|
|
}
|
|
|
|
static void __init up_prepare_cpus(unsigned int max_cpus)
|
|
{
|
|
}
|
|
|
|
#ifdef CONFIG_HOTPLUG_CPU
|
|
static int up_cpu_disable(void)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static void up_cpu_die(unsigned int cpu)
|
|
{
|
|
BUG();
|
|
}
|
|
#endif
|
|
|
|
const struct plat_smp_ops up_smp_ops = {
|
|
.send_ipi_single = up_send_ipi_single,
|
|
.send_ipi_mask = up_send_ipi_mask,
|
|
.init_secondary = up_init_secondary,
|
|
.smp_finish = up_smp_finish,
|
|
.boot_secondary = up_boot_secondary,
|
|
.smp_setup = up_smp_setup,
|
|
.prepare_cpus = up_prepare_cpus,
|
|
#ifdef CONFIG_HOTPLUG_CPU
|
|
.cpu_disable = up_cpu_disable,
|
|
.cpu_die = up_cpu_die,
|
|
#endif
|
|
};
|