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47 lines
1007 B
47 lines
1007 B
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* Copyright 2011 Freescale Semiconductor, Inc. |
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* Copyright 2011 Linaro Ltd. |
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*/ |
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#include <linux/errno.h> |
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#include <linux/jiffies.h> |
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#include <asm/cacheflush.h> |
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#include <asm/cp15.h> |
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#include <asm/proc-fns.h> |
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#include "common.h" |
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#include "hardware.h" |
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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 imx_cpu_die(unsigned int cpu) |
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{ |
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v7_exit_coherency_flush(louis); |
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/* |
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* We use the cpu jumping argument register to sync with |
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* imx_cpu_kill() which is running on cpu0 and waiting for |
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* the register being cleared to kill the cpu. |
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*/ |
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imx_set_cpu_arg(cpu, ~0); |
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while (1) |
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cpu_do_idle(); |
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} |
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int imx_cpu_kill(unsigned int cpu) |
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{ |
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unsigned long timeout = jiffies + msecs_to_jiffies(50); |
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while (imx_get_cpu_arg(cpu) == 0) |
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if (time_after(jiffies, timeout)) |
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return 0; |
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imx_enable_cpu(cpu, false); |
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imx_set_cpu_arg(cpu, 0); |
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if (cpu_is_imx7d()) |
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imx_gpcv2_set_core1_pdn_pup_by_software(true); |
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return 1; |
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}
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