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| 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/seabios/src/x86.c | |
| download | qemu-master.tar.gz qemu-master.tar.bz2 qemu-master.zip | |
Diffstat (limited to 'roms/seabios/src/x86.c')
| -rw-r--r-- | roms/seabios/src/x86.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/roms/seabios/src/x86.c b/roms/seabios/src/x86.c new file mode 100644 index 00000000..0fdf86f9 --- /dev/null +++ b/roms/seabios/src/x86.c @@ -0,0 +1,23 @@ +// X86 utility functions. +// +// Copyright (C) 2013 Kevin O'Connor <kevin@koconnor.net> +// +// This file may be distributed under the terms of the GNU LGPLv3 license. + +#include "x86.h" // __cpuid + +void +cpuid(u32 index, u32 *eax, u32 *ebx, u32 *ecx, u32 *edx) +{ + // Check for cpu id + u32 origflags = save_flags(); + restore_flags(origflags ^ F_ID); + u32 newflags = save_flags(); + restore_flags(origflags); + + if (((origflags ^ newflags) & F_ID) != F_ID) + // no cpuid + *eax = *ebx = *ecx = *edx = 0; + else + __cpuid(index, eax, ebx, ecx, edx); +} |