ref: 85ffa283f67b4bd139a4e28e82f0d1c7f6c53b3b dir: /sys/src/9/bcm64/init9.s/
TEXT main(SB), 1, $8 MOV $setSB(SB), R28 /* load the SB */ MOV $boot(SB), R0 B startboot(SB)