MSGU_HOST_SCRATCH_PAD_0
ossaHwRegRead(agRoot, MSGU_HOST_SCRATCH_PAD_0);
ossaHwRegWrite(agRoot, MSGU_HOST_SCRATCH_PAD_0, signature);
ossaHwRegWrite(agRoot, MSGU_HOST_SCRATCH_PAD_0, SPC_HDASOFT_RESET_SIGNATURE);
ossaHwRegWrite(agRoot, MSGU_HOST_SCRATCH_PAD_0, 0);
{ GEN_MSGU_HOST_SCRATCH_PAD_0, PCIBAR0, MSGU_HOST_SCRATCH_PAD_0, SIZE_DW }, /* 0x07 */