diff --git a/sys/contrib/octeon-sdk/cvmx-pow.h b/sys/contrib/octeon-sdk/cvmx-pow.h
index a5771c6dcfc0..f70eaf6542cc 100644
--- a/sys/contrib/octeon-sdk/cvmx-pow.h
+++ b/sys/contrib/octeon-sdk/cvmx-pow.h
@@ -80,9 +80,23 @@
 extern "C" {
 #endif
 
-/* Default to having all POW constancy checks turned on */
-#ifndef CVMX_ENABLE_POW_CHECKS
-#define CVMX_ENABLE_POW_CHECKS 1
+#if defined(__FreeBSD__) && defined(_KERNEL)
+    /*
+     * For the FreeBSD kernel, have POW consistency checks depend on
+     * the setting of INVARIANTS.
+     */
+    #ifndef CVMX_ENABLE_POW_CHECKS
+        #ifdef INVARIANTS
+            #define CVMX_ENABLE_POW_CHECKS 1
+        #else
+            #define CVMX_ENABLE_POW_CHECKS 0
+        #endif
+    #endif
+#else
+    /* Default to having all POW constancy checks turned on */
+    #ifndef CVMX_ENABLE_POW_CHECKS
+        #define CVMX_ENABLE_POW_CHECKS 1
+    #endif
 #endif
 
 /**
diff --git a/sys/contrib/octeon-sdk/cvmx-warn.c b/sys/contrib/octeon-sdk/cvmx-warn.c
index 4f1464a94d4a..7b0b3fdf7663 100644
--- a/sys/contrib/octeon-sdk/cvmx-warn.c
+++ b/sys/contrib/octeon-sdk/cvmx-warn.c
@@ -76,8 +76,12 @@ void cvmx_warn(const char *format, ...)
 #ifdef CVMX_BUILD_FOR_LINUX_KERNEL
     printk("WARNING:");
     vprintk(format, args);
+#else
+#ifdef CVMX_BUILD_FOR_FREEBSD_KERNEL
+    printf("WARNING: ");
 #else
     printf("WARNING:\n");
+#endif
     vprintf(format, args);
 #endif
     va_end(args);
diff --git a/sys/contrib/octeon-sdk/cvmx.h b/sys/contrib/octeon-sdk/cvmx.h
index 0b92bc368d1d..3cde2f4e159b 100644
--- a/sys/contrib/octeon-sdk/cvmx.h
+++ b/sys/contrib/octeon-sdk/cvmx.h
@@ -53,13 +53,28 @@
 /* Control whether simple executive applications use 1-1 TLB mappings to access physical
 ** memory addresses.  This must be disabled to allow large programs that use more than
 ** the 0x10000000 - 0x20000000 virtual address range.
+**
+** The FreeBSD kernel ifdefs elsewhere should mean that this is never even checked,
+** and so does not need to be defined.
 */
+#if !defined(__FreeBSD__) || !defined(_KERNEL)
 #ifndef CVMX_USE_1_TO_1_TLB_MAPPINGS
 #define CVMX_USE_1_TO_1_TLB_MAPPINGS 1
 #endif
+#endif
 
-#ifndef CVMX_ENABLE_PARAMETER_CHECKING
-#define CVMX_ENABLE_PARAMETER_CHECKING 1
+#if defined(__FreeBSD__) && defined(_KERNEL)
+    #ifndef CVMX_ENABLE_PARAMETER_CHECKING
+        #ifdef INVARIANTS
+            #define CVMX_ENABLE_PARAMETER_CHECKING 1
+        #else
+            #define CVMX_ENABLE_PARAMETER_CHECKING 0
+        #endif
+    #endif
+#else
+    #ifndef CVMX_ENABLE_PARAMETER_CHECKING
+        #define CVMX_ENABLE_PARAMETER_CHECKING 1
+    #endif
 #endif
 
 #ifndef CVMX_ENABLE_DEBUG_PRINTS