ref: 2db3642b8d3b871c6f9d1f4e3204b2f44fc4b79f 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)