ref: f596580cba7c5b7bae84ee7cd83d2b2a438a1e9b
dir: /sys/src/libc/power/tas.s/
TEXT _tas(SB), 1, $-4 MOVW R3, R4 MOVW $0xdeaddead,R5 tas1: /* DCBF (R4) fix for 603x bug */ SYNC LWAR (R4), R3 CMP R3, $0 BNE tas0 DCBT (R4) /* fix 405 errata cpu_210 */ STWCCC R5, (R4) BNE tas1 tas0: RETURN