From 0459ca9b7a9f86d0523e008b79c1fcf1afbd3635 Mon Sep 17 00:00:00 2001 From: Marc Zyngier Date: Wed, 2 Jan 2013 15:34:50 +0000 Subject: arm64: SMP: enable PSCI boot method Wire the PSCI implementation into the SMP secondary startup code. Signed-off-by: Marc Zyngier Signed-off-by: Catalin Marinas --- arch/arm64/kernel/smp_psci.c | 52 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 52 insertions(+) create mode 100644 arch/arm64/kernel/smp_psci.c (limited to 'arch/arm64/kernel/smp_psci.c') diff --git a/arch/arm64/kernel/smp_psci.c b/arch/arm64/kernel/smp_psci.c new file mode 100644 index 000000000000..112091684c22 --- /dev/null +++ b/arch/arm64/kernel/smp_psci.c @@ -0,0 +1,52 @@ +/* + * PSCI SMP initialisation + * + * Copyright (C) 2013 ARM Ltd. + * + * 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. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + +#include +#include +#include + +#include + +static int __init smp_psci_init_cpu(struct device_node *dn, int cpu) +{ + return 0; +} + +static int __init smp_psci_prepare_cpu(int cpu) +{ + int err; + + if (!psci_ops.cpu_on) { + pr_err("psci: no cpu_on method, not booting CPU%d\n", cpu); + return -ENODEV; + } + + err = psci_ops.cpu_on(cpu, __pa(secondary_holding_pen)); + if (err) { + pr_err("psci: failed to boot CPU%d (%d)\n", cpu, err); + return err; + } + + return 0; +} + +const struct smp_enable_ops smp_psci_ops __initconst = { + .name = "psci", + .init_cpu = smp_psci_init_cpu, + .prepare_cpu = smp_psci_prepare_cpu, +}; -- cgit v1.2.2