+ case CPU_74K:
+ case CPU_1004K:
+ {
+#define ERRCTL_PE 0x80000000
+#define ERRCTL_L2P 0x00800000
+ unsigned long errctl;
+ unsigned int l1parity_present, l2parity_present;
+
+ errctl = read_c0_ecc();
+ errctl &= ~(ERRCTL_PE|ERRCTL_L2P);
+
+ /* probe L1 parity support */
+ write_c0_ecc(errctl | ERRCTL_PE);
+ back_to_back_c0_hazard();
+ l1parity_present = (read_c0_ecc() & ERRCTL_PE);
+
+ /* probe L2 parity support */
+ write_c0_ecc(errctl|ERRCTL_L2P);
+ back_to_back_c0_hazard();
+ l2parity_present = (read_c0_ecc() & ERRCTL_L2P);
+
+ if (l1parity_present && l2parity_present) {
+ if (l1parity)
+ errctl |= ERRCTL_PE;
+ if (l1parity ^ l2parity)
+ errctl |= ERRCTL_L2P;
+ } else if (l1parity_present) {
+ if (l1parity)
+ errctl |= ERRCTL_PE;
+ } else if (l2parity_present) {
+ if (l2parity)
+ errctl |= ERRCTL_L2P;
+ } else {
+ /* No parity available */
+ }
+
+ printk(KERN_INFO "Writing ErrCtl register=%08lx\n", errctl);
+
+ write_c0_ecc(errctl);
+ back_to_back_c0_hazard();
+ errctl = read_c0_ecc();
+ printk(KERN_INFO "Readback ErrCtl register=%08lx\n", errctl);
+
+ if (l1parity_present)
+ printk(KERN_INFO "Cache parity protection %sabled\n",
+ (errctl & ERRCTL_PE) ? "en" : "dis");
+
+ if (l2parity_present) {
+ if (l1parity_present && l1parity)
+ errctl ^= ERRCTL_L2P;
+ printk(KERN_INFO "L2 cache parity protection %sabled\n",
+ (errctl & ERRCTL_L2P) ? "en" : "dis");
+ }
+ }
+ break;
+