diff options
| author | fishsoupisgood <github@madingley.org> | 2019-04-29 01:17:54 +0100 |
|---|---|---|
| committer | fishsoupisgood <github@madingley.org> | 2019-05-27 03:43:43 +0100 |
| commit | 3f2546b2ef55b661fd8dd69682b38992225e86f6 (patch) | |
| tree | 65ca85f13617aee1dce474596800950f266a456c /roms/u-boot/post/cpu/ppc4xx/fpu.c | |
| download | qemu-master.tar.gz qemu-master.tar.bz2 qemu-master.zip | |
Diffstat (limited to 'roms/u-boot/post/cpu/ppc4xx/fpu.c')
| -rw-r--r-- | roms/u-boot/post/cpu/ppc4xx/fpu.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/roms/u-boot/post/cpu/ppc4xx/fpu.c b/roms/u-boot/post/cpu/ppc4xx/fpu.c new file mode 100644 index 00000000..51e53ff2 --- /dev/null +++ b/roms/u-boot/post/cpu/ppc4xx/fpu.c @@ -0,0 +1,41 @@ +/* + * (C) Copyright 2007 + * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + * + * Author: Sergei Poselenov <sposelenov@emcraft.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <config.h> + +#if defined(CONFIG_440EP) || \ + defined(CONFIG_440EPX) + +#include <asm/processor.h> +#include <asm/ppc4xx.h> + + +int fpu_status(void) +{ + if (mfspr(SPRN_CCR0) & CCR0_DAPUIB) + return 0; /* Disabled */ + else + return 1; /* Enabled */ +} + + +void fpu_disable(void) +{ + mtspr(SPRN_CCR0, mfspr(SPRN_CCR0) | CCR0_DAPUIB); + mtmsr(mfmsr() & ~MSR_FP); +} + + +void fpu_enable(void) +{ + mtspr(SPRN_CCR0, mfspr(SPRN_CCR0) & ~CCR0_DAPUIB); + mtmsr(mfmsr() | MSR_FP); +} + +#endif |