c->loongson3_cpucfg_data[1] = 0;
c->loongson3_cpucfg_data[2] = 0;
- /* Add CPUCFG features non-discoverable otherwise.
- *
- * All Loongson processors covered by CPUCFG emulation have distinct
- * PRID_REV, so take advantage of this.
- */
- switch (c->processor_id & PRID_REV_MASK) {
- case PRID_REV_LOONGSON3A_R1:
+ /* Add CPUCFG features non-discoverable otherwise. */
+ switch (c->processor_id & (PRID_IMP_MASK | PRID_REV_MASK)) {
+ case PRID_IMP_LOONGSON_64C | PRID_REV_LOONGSON3A_R1:
c->loongson3_cpucfg_data[0] |= (LOONGSON_CFG1_LSLDR0 |
LOONGSON_CFG1_LSSYNCI | LOONGSON_CFG1_LSUCA |
LOONGSON_CFG1_LLSYNC | LOONGSON_CFG1_TGTSYNC);
LOONGSON_CFG3_LCAMVW_REV1);
break;
- case PRID_REV_LOONGSON3B_R1:
- case PRID_REV_LOONGSON3B_R2:
+ case PRID_IMP_LOONGSON_64C | PRID_REV_LOONGSON3B_R1:
+ case PRID_IMP_LOONGSON_64C | PRID_REV_LOONGSON3B_R2:
c->loongson3_cpucfg_data[0] |= (LOONGSON_CFG1_LSLDR0 |
LOONGSON_CFG1_LSSYNCI | LOONGSON_CFG1_LSUCA |
LOONGSON_CFG1_LLSYNC | LOONGSON_CFG1_TGTSYNC);
LOONGSON_CFG3_LCAMVW_REV1);
break;
- case PRID_REV_LOONGSON2K_R1_0:
- case PRID_REV_LOONGSON2K_R1_1:
- case PRID_REV_LOONGSON2K_R1_2:
- case PRID_REV_LOONGSON2K_R1_3:
+ case PRID_IMP_LOONGSON_64R | PRID_REV_LOONGSON2K_R1_0:
+ case PRID_IMP_LOONGSON_64R | PRID_REV_LOONGSON2K_R1_1:
+ case PRID_IMP_LOONGSON_64R | PRID_REV_LOONGSON2K_R1_2:
+ case PRID_IMP_LOONGSON_64R | PRID_REV_LOONGSON2K_R1_3:
decode_loongson_config6(c);
probe_uca(c);
c->loongson3_cpucfg_data[2] = 0;
break;
- case PRID_REV_LOONGSON3A_R2_0:
- case PRID_REV_LOONGSON3A_R2_1:
- case PRID_REV_LOONGSON3A_R3_0:
- case PRID_REV_LOONGSON3A_R3_1:
+ case PRID_IMP_LOONGSON_64C | PRID_REV_LOONGSON3A_R2_0:
+ case PRID_IMP_LOONGSON_64C | PRID_REV_LOONGSON3A_R2_1:
+ case PRID_IMP_LOONGSON_64C | PRID_REV_LOONGSON3A_R3_0:
+ case PRID_IMP_LOONGSON_64C | PRID_REV_LOONGSON3A_R3_1:
decode_loongson_config6(c);
probe_uca(c);
LOONGSON_CFG3_LCAMKW_REV1 |
LOONGSON_CFG3_LCAMVW_REV1);
break;
+
+ default:
+ /* It is possible that some future Loongson cores still do
+ * not have CPUCFG, so do not emulate anything for these
+ * cores.
+ */
+ return;
}
/* This feature is set by firmware, but all known Loongson-64 systems