42 lines
658 B
C
42 lines
658 B
C
/*
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* (C) Copyright 2007
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* Author: Sergei Poselenov <sposelenov@emcraft.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <config.h>
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#if defined(CONFIG_440EP) || \
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defined(CONFIG_440EPX)
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#include <asm/processor.h>
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#include <asm/ppc4xx.h>
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int fpu_status(void)
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{
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if (mfspr(SPRN_CCR0) & CCR0_DAPUIB)
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return 0; /* Disabled */
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else
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return 1; /* Enabled */
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}
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void fpu_disable(void)
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{
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mtspr(SPRN_CCR0, mfspr(SPRN_CCR0) | CCR0_DAPUIB);
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mtmsr(mfmsr() & ~MSR_FP);
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}
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void fpu_enable(void)
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{
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mtspr(SPRN_CCR0, mfspr(SPRN_CCR0) & ~CCR0_DAPUIB);
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mtmsr(mfmsr() | MSR_FP);
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}
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#endif
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