| /* SPDX-License-Identifier: GPL-2.0-only */ | |
| /* | |
| * Store the initial timestamp for booting in mmx registers. This works | |
| * because the bootblock isn't being compiled with MMX support so mm1 and | |
| * mm2 will be preserved into romstage. | |
| */ | |
| .code32 | |
| .global stash_timestamp | |
| stash_timestamp: | |
| /* Save the BIST value */ | |
| movl %eax, %ebx | |
| finit | |
| rdtsc | |
| movd %ebx, %mm0 | |
| movd %eax, %mm1 | |
| movd %edx, %mm2 | |
| /* Restore the BIST value to %eax */ | |
| movl %ebx, %eax |