Release 4.11 arch/arm/mach-omap2/omap-hotplug.c

/*
 * OMAP4 SMP cpu-hotplug support
 *
 * Copyright (C) 2010 Texas Instruments, Inc.
 * Author:
 *      Santosh Shilimkar <santosh.shilimkar@ti.com>
 *
 * Platform file needed for the OMAP4 SMP. This file is based on arm
 * realview smp platform.
 * Copyright (c) 2002 ARM Limited.
 *
 * 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/kernel.h>
#include <linux/errno.h>
#include <linux/smp.h>
#include <linux/io.h>

#include "omap-wakeupgen.h"
#include "common.h"
#include "powerdomain.h"

/*
 * platform-specific code to shutdown a CPU
 * Called with IRQs disabled
 */


void omap4_cpu_die(unsigned int cpu)
{
	unsigned int boot_cpu = 0;
	void __iomem *base = omap_get_wakeupgen_base();

	/*
         * we're ready for shutdown now, so do it
         */
	if (omap_secure_apis_support()) {
		if (omap_modify_auxcoreboot0(0x0, 0x200) != 0x0)
			pr_err("Secure clear status failed\n");
	} else {
		writel_relaxed(0, base + OMAP_AUX_CORE_BOOT_0);
	}


	for (;;) {
		/*
                 * Enter into low power state
                 */
		omap4_hotplug_cpu(cpu, PWRDM_POWER_OFF);

		if (omap_secure_apis_support())
			boot_cpu = omap_read_auxcoreboot0() >> 9;
		else
			boot_cpu =
				readl_relaxed(base + OMAP_AUX_CORE_BOOT_0) >> 5;

		if (boot_cpu == smp_processor_id()) {
			/*
                         * OK, proper wakeup, we're done
                         */
			break;
		}
		pr_debug("CPU%u: spurious wakeup call\n", cpu);
	}
}

Contributors
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CommitProp
Santosh Shilimkar
111
95.69%
3
50.00%
Tony Lindgren
2
1.72%
1
16.67%
Victor Kamensky
2
1.72%
1
16.67%
Marc Zyngier
1
0.86%
1
16.67%
Total
116
100.00%
6
100.00%

/* Needed by kexec and platform_can_cpu_hotplug() */


int omap4_cpu_kill(unsigned int cpu)
{
	return 1;
}
Contributors
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Tony Lindgren
12
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1
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12
100.00%
1
100.00%

Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Santosh Shilimkar
132
86.84%
3
33.33%
Tony Lindgren
17
11.18%
4
44.44%
Victor Kamensky
2
1.32%
1
11.11%
Marc Zyngier
1
0.66%
1
11.11%
Total
152
100.00%
9
100.00%
Directory: arch/arm/mach-omap2

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