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diff --git a/sys/arm64/include/armreg.h b/sys/arm64/include/armreg.h
--- a/sys/arm64/include/armreg.h
+++ b/sys/arm64/include/armreg.h
@@ -2377,9 +2377,8 @@
#define PMCR_X (1 << 4) /* Export to ext. monitoring (ETM) */
#define PMCR_DP (1 << 5) /* Disable CCNT if non-invasive debug*/
#define PMCR_LC (1 << 6) /* Long cycle count enable */
-#define PMCR_IMP_SHIFT 24 /* Implementer code */
-#define PMCR_IMP_MASK (0xff << PMCR_IMP_SHIFT)
-#define PMCR_IMP_ARM 0x41
+#define PMCR_N_SHIFT 11 /* Number of counters implemented */
+#define PMCR_N_MASK (0x1f << PMCR_N_SHIFT)
#define PMCR_IDCODE_SHIFT 16 /* Identification code */
#define PMCR_IDCODE_MASK (0xff << PMCR_IDCODE_SHIFT)
#define PMCR_IDCODE_CORTEX_A57 0x01
@@ -2393,8 +2392,9 @@
#define PMCR_IDCODE_CORTEX_A55 0x45
#define PMCR_IDCODE_NEOVERSE_E1 0x46
#define PMCR_IDCODE_CORTEX_A75 0x4a
-#define PMCR_N_SHIFT 11 /* Number of counters implemented */
-#define PMCR_N_MASK (0x1f << PMCR_N_SHIFT)
+#define PMCR_IMP_SHIFT 24 /* Implementer code */
+#define PMCR_IMP_MASK (0xff << PMCR_IMP_SHIFT)
+#define PMCR_IMP_ARM 0x41
/* PMEVCNTR<n>_EL0 */
#define PMEVCNTR_EL0_op0 3

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