PCICFG_COMMAND_PERR_ENA
#define PCICFG_COMMAND_PERR_ENA (1<<6)
val &= ~(PCICFG_COMMAND_SERR_ENA | PCICFG_COMMAND_PERR_ENA);
val &= ~PCICFG_COMMAND_PERR_ENA;
val &= ~(PCICFG_COMMAND_SERR_ENA | PCICFG_COMMAND_PERR_ENA);