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| 2 | |
| 3 | * Copyright (C) 2023 SiFive
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| 4 |
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| 5 |
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| 6 | #include <linux/export.h>
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| 7 | #include <linux/preempt.h>
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| 8 |
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| 9 | #include <asm/csr.h>
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| 10 | #include <asm/fpu.h>
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| 11 | #include <asm/processor.h>
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| 12 | #include <asm/switch_to.h>
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| 13 |
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| 14 | void kernel_fpu_begin(void)
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| 15 | {
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| 16 | preempt_disable();
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| 17 | fstate_save(current, task_pt_regs(current));
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| 18 | csr_set(CSR_SSTATUS, SR_FS);
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| 19 | }
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| 20 | EXPORT_SYMBOL_GPL(kernel_fpu_begin);
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| 21 |
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| 22 | void kernel_fpu_end(void)
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| 23 | {
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| 24 | csr_clear(CSR_SSTATUS, SR_FS);
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| 25 | fstate_restore(current, task_pt_regs(current));
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| 26 | preempt_enable();
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| 27 | }
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| 28 | EXPORT_SYMBOL_GPL(kernel_fpu_end);
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