From 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 27 Apr 2024 12:05:51 +0200 Subject: Adding upstream version 5.10.209. Signed-off-by: Daniel Baumann --- arch/arm/mach-prima2/hotplug.c | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) create mode 100644 arch/arm/mach-prima2/hotplug.c (limited to 'arch/arm/mach-prima2/hotplug.c') diff --git a/arch/arm/mach-prima2/hotplug.c b/arch/arm/mach-prima2/hotplug.c new file mode 100644 index 000000000..bc0d957e8 --- /dev/null +++ b/arch/arm/mach-prima2/hotplug.c @@ -0,0 +1,38 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * CPU hotplug support for CSR Marco dual-core SMP SoCs + * + * Copyright (c) 2012 Cambridge Silicon Radio Limited, a CSR plc group company. + */ + +#include +#include +#include + +#include +#include "common.h" + +static inline void platform_do_lowpower(unsigned int cpu) +{ + /* we put the platform to just WFI */ + for (;;) { + __asm__ __volatile__("dsb\n\t" "wfi\n\t" + : : : "memory"); + if (prima2_pen_release == cpu_logical_map(cpu)) { + /* + * OK, proper wakeup, we're done + */ + break; + } + } +} + +/* + * platform-specific code to shutdown a CPU + * + * Called with IRQs disabled + */ +void sirfsoc_cpu_die(unsigned int cpu) +{ + platform_do_lowpower(cpu); +} -- cgit v1.2.3