ref: 5ea540e75def56d3c2b5ef16f0f4e91d5f5c0ad1 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)