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: Geert Uytterhoeven <geert+renesas@glider.be> Tested-by: Hiep Cao Minh <cm-hiep@jinso.co.jp> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
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@ -216,21 +216,9 @@ static void __init shmobile_smp_apmu_prepare_cpus_dt(unsigned int max_cpus)
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rcar_gen2_pm_init();
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}
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static int shmobile_smp_apmu_boot_secondary_md21(unsigned int cpu,
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struct task_struct *idle)
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{
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/* Error out when hardware debug mode is enabled */
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if (rcar_gen2_read_mode_pins() & BIT(21)) {
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pr_warn("Unable to boot CPU%u when MD21 is set\n", cpu);
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return -ENOTSUPP;
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}
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return shmobile_smp_apmu_boot_secondary(cpu, idle);
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}
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static struct smp_operations apmu_smp_ops __initdata = {
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.smp_prepare_cpus = shmobile_smp_apmu_prepare_cpus_dt,
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.smp_boot_secondary = shmobile_smp_apmu_boot_secondary_md21,
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.smp_boot_secondary = shmobile_smp_apmu_boot_secondary,
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#ifdef CONFIG_HOTPLUG_CPU
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.cpu_can_disable = shmobile_smp_cpu_can_disable,
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.cpu_die = shmobile_smp_apmu_cpu_die,
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