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Commit d03c8f78 authored by Geert Uytterhoeven's avatar Geert Uytterhoeven Committed by Simon Horman
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ARM: shmobile: apmu: Allow booting secondary CPU cores in debug mode 



Now debug resource reset is handled properly, allow booting secondary
CPU cores when hardware debug mode is enabled (MD21=1) on SoCs using the
"renesas,apmu" enable method.

Signed-off-by: default avatarGeert Uytterhoeven <geert+renesas@glider.be>
Tested-by: default avatarHiep Cao Minh <cm-hiep@jinso.co.jp>
Signed-off-by: default avatarSimon Horman <horms+renesas@verge.net.au>
parent 10f778a9

arch/arm/mach-shmobile/platsmp-apmu.c

+1 −13
Original line number Diff line number Diff line
@@ -216,21 +216,9 @@ static void __init shmobile_smp_apmu_prepare_cpus_dt(unsigned int max_cpus) 
	rcar_gen2_pm_init();

}



static int shmobile_smp_apmu_boot_secondary_md21(unsigned int cpu,

						 struct task_struct *idle)

{

	/* Error out when hardware debug mode is enabled */

	if (rcar_gen2_read_mode_pins() & BIT(21)) {

		pr_warn("Unable to boot CPU%u when MD21 is set\n", cpu);

		return -ENOTSUPP;

	}



	return shmobile_smp_apmu_boot_secondary(cpu, idle);

}



static struct smp_operations apmu_smp_ops __initdata = {

	.smp_prepare_cpus	= shmobile_smp_apmu_prepare_cpus_dt,

	.smp_boot_secondary	= shmobile_smp_apmu_boot_secondary_md21,

	.smp_boot_secondary	= shmobile_smp_apmu_boot_secondary,

#ifdef CONFIG_HOTPLUG_CPU

	.cpu_can_disable	= shmobile_smp_cpu_can_disable,

	.cpu_die		= shmobile_smp_apmu_cpu_die,