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38 lines
763 B
38 lines
763 B
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* CPU hotplug support for CSR Marco dual-core SMP SoCs |
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* |
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* Copyright (c) 2012 Cambridge Silicon Radio Limited, a CSR plc group company. |
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*/ |
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#include <linux/kernel.h> |
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#include <linux/errno.h> |
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#include <linux/smp.h> |
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#include <asm/smp_plat.h> |
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#include "common.h" |
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static inline void platform_do_lowpower(unsigned int cpu) |
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{ |
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/* we put the platform to just WFI */ |
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for (;;) { |
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__asm__ __volatile__("dsb\n\t" "wfi\n\t" |
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: : : "memory"); |
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if (prima2_pen_release == cpu_logical_map(cpu)) { |
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/* |
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* OK, proper wakeup, we're done |
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*/ |
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break; |
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} |
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} |
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} |
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/* |
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* platform-specific code to shutdown a CPU |
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* |
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* Called with IRQs disabled |
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*/ |
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void sirfsoc_cpu_die(unsigned int cpu) |
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{ |
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platform_do_lowpower(cpu); |
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}
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