Board-specific boot firmware

The CDSP/NSP machines can use the host firmware shipped in pc-bios, selected with -bios. These images contain H2 and either the booter or loadlinux loader. Use -L to specify QEMU’s firmware directory when running an uninstalled build.

Machine

CPU

-kernel address

Image suffix

qcs6490-cdsp

v68

0xa1000000

qcs6490_cdsp

sa8775p-cdsp

v73

0xa0000000

sa8775p_cdsp

sm8975-nsp

v85

0xa0000000

sm8975_nsp

sc8480xp-nsp0

v81

0xa0000000

sc8480xp_nsp0

sa8797p-nsp0

v81

0xa0000000

sa8797p_nsp0
hexagon_loadlinux_<suffix>

Boots a guest operating system written for the Hexagon VM interface. Despite the name, it is not specific to Linux. H2 starts the guest from an image that QEMU has placed at the -kernel address in the table above.

hexagon_booter_<suffix>

Runs H2 user programs. The booter creates a VM, loads a program that it reads from the host through semihosting, and waits for the program to exit:

qemu-system-hexagon -M qcs6490-cdsp -serial stdio -display none \
    -bios hexagon_booter_qcs6490_cdsp \
    -semihosting-config enable=on,target=native,arg=booter,arg=prog.elf

Programs are loaded at 0xa2000000 by default; the booter’s --guest_base option changes this (arg=--help lists its options).

For more info, see <https://github.com/qualcomm/hexagon-hypervisor>.