+ case CSR_MISA: {
+ if (!(val & (1L << ('F' - 'A'))))
+ val &= ~(1L << ('D' - 'A'));
+
+ // allow MAFDC bits in MISA to be modified
+ reg_t mask = 0;
+ mask |= 1L << ('M' - 'A');
+ mask |= 1L << ('A' - 'A');
+ mask |= 1L << ('F' - 'A');
+ mask |= 1L << ('D' - 'A');
+ mask |= 1L << ('C' - 'A');
+ mask &= max_isa;
+
+ isa = (val & mask) | (isa & ~mask);
+ break;
+ }
+ case CSR_TSELECT:
+ if (val < state.num_triggers) {
+ state.tselect = val;
+ }
+ break;
+ case CSR_TDATA1:
+ {
+ mcontrol_t *mc = &state.mcontrol[state.tselect];
+ if (mc->dmode && !state.dcsr.cause) {
+ break;
+ }
+ mc->dmode = get_field(val, MCONTROL_DMODE(xlen));
+ mc->select = get_field(val, MCONTROL_SELECT);
+ mc->timing = get_field(val, MCONTROL_TIMING);
+ mc->action = (mcontrol_action_t) get_field(val, MCONTROL_ACTION);
+ mc->chain = get_field(val, MCONTROL_CHAIN);
+ mc->match = (mcontrol_match_t) get_field(val, MCONTROL_MATCH);
+ mc->m = get_field(val, MCONTROL_M);
+ mc->h = get_field(val, MCONTROL_H);
+ mc->s = get_field(val, MCONTROL_S);
+ mc->u = get_field(val, MCONTROL_U);
+ mc->execute = get_field(val, MCONTROL_EXECUTE);
+ mc->store = get_field(val, MCONTROL_STORE);
+ mc->load = get_field(val, MCONTROL_LOAD);
+ // Assume we're here because of csrw.
+ if (mc->execute)
+ mc->timing = 0;
+ trigger_updated();
+ }
+ break;
+ case CSR_TDATA2:
+ if (state.mcontrol[state.tselect].dmode && !state.dcsr.cause) {
+ break;
+ }
+ if (state.tselect < state.num_triggers) {
+ state.tdata2[state.tselect] = val;
+ }
+ break;
+ case CSR_DCSR:
+ state.dcsr.prv = get_field(val, DCSR_PRV);
+ state.dcsr.step = get_field(val, DCSR_STEP);