diff options
Diffstat (limited to 'qemu/roms/seabios/src/x86.c')
| -rw-r--r-- | qemu/roms/seabios/src/x86.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/qemu/roms/seabios/src/x86.c b/qemu/roms/seabios/src/x86.c new file mode 100644 index 000000000..0fdf86f9c --- /dev/null +++ b/qemu/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); +} |