28 lines
560 B
C
28 lines
560 B
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 2023 SiFive
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*/
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#include <linux/export.h>
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#include <linux/preempt.h>
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#include <asm/csr.h>
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#include <asm/fpu.h>
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#include <asm/processor.h>
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#include <asm/switch_to.h>
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void kernel_fpu_begin(void)
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{
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preempt_disable();
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fstate_save(current, task_pt_regs(current));
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csr_set(CSR_SSTATUS, SR_FS);
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}
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EXPORT_SYMBOL_GPL(kernel_fpu_begin);
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void kernel_fpu_end(void)
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{
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csr_clear(CSR_SSTATUS, SR_FS);
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fstate_restore(current, task_pt_regs(current));
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preempt_enable();
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}
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EXPORT_SYMBOL_GPL(kernel_fpu_end);
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