ref: bbd3489b20172576e25e43bae016f6dcf1eba7f5
dir: /sys/src/9/bcm/pi/
dev root cons swap env pipe proc mnt srv shr dup arch ssl tls cap fs ip arp chandial ip ipv6 ipaux iproute netlog nullmedium pktmedium inferno draw screen swcursor mouse mouse uart gpio gpio gpio sd usb link loopbackmedium ethermedium archbcm usbdwc ip tcp udp ipifc icmp icmp6 ipmux misc armv6 uartmini sdmmc emmc dma vcore vfp3 coproc port int cpuserver = 0; bootdir /$objtype/bin/paqfs /$objtype/bin/auth/factotum bootfs.paq boot