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diff --git a/sys/amd64/include/param.h b/sys/amd64/include/param.h
--- a/sys/amd64/include/param.h
+++ b/sys/amd64/include/param.h
@@ -95,6 +95,8 @@
#define PAGE_SHIFT 12 /* LOG2(PAGE_SIZE) */
#define PAGE_SIZE (1<<PAGE_SHIFT) /* bytes/page */
#define PAGE_MASK (PAGE_SIZE-1)
+#define PAGE_SIZE_MAX PAGE_SIZE
+#define PAGE_SHIFT_MAX PAGE_SHIFT
/* Size of the level 2 page directory units */
#define NPDEPG (PAGE_SIZE/(sizeof (pd_entry_t)))
#define NPDEPGSHIFT 9 /* LOG2(NPDEPG) */
diff --git a/sys/arm/include/param.h b/sys/arm/include/param.h
--- a/sys/arm/include/param.h
+++ b/sys/arm/include/param.h
@@ -102,6 +102,8 @@
#define PAGE_SHIFT 12
#define PAGE_SIZE (1 << PAGE_SHIFT) /* Page size */
#define PAGE_MASK (PAGE_SIZE - 1)
+#define PAGE_SIZE_MAX PAGE_SIZE
+#define PAGE_SHIFT_MAX PAGE_SHIFT
#define PDR_SHIFT 20 /* log2(NBPDR) */
#define NBPDR (1 << PDR_SHIFT)
diff --git a/sys/arm64/include/param.h b/sys/arm64/include/param.h
--- a/sys/arm64/include/param.h
+++ b/sys/arm64/include/param.h
@@ -97,6 +97,9 @@
#define PAGE_SIZE (1 << PAGE_SHIFT)
#define PAGE_MASK (PAGE_SIZE - 1)
+#define PAGE_SHIFT_MAX PAGE_SHIFT_64K
+#define PAGE_SIZE_MAX PAGE_SIZE_64K
+
#define MAXPAGESIZES 3 /* maximum number of supported page sizes */
#ifndef KSTACK_PAGES
diff --git a/sys/i386/include/param.h b/sys/i386/include/param.h
--- a/sys/i386/include/param.h
+++ b/sys/i386/include/param.h
@@ -85,6 +85,8 @@
#define PAGE_SHIFT 12 /* LOG2(PAGE_SIZE) */
#define PAGE_SIZE (1 << PAGE_SHIFT) /* bytes/page */
#define PAGE_MASK (PAGE_SIZE - 1)
+#define PAGE_SIZE_MAX PAGE_SIZE
+#define PAGE_SHIFT_MAX PAGE_SHIFT
#define NPTEPG (PAGE_SIZE / sizeof(pt_entry_t))
/* Size in bytes of the page directory */
diff --git a/sys/powerpc/include/param.h b/sys/powerpc/include/param.h
--- a/sys/powerpc/include/param.h
+++ b/sys/powerpc/include/param.h
@@ -106,6 +106,8 @@
#define PAGE_SHIFT 12
#define PAGE_SIZE (1 << PAGE_SHIFT) /* Page size */
#define PAGE_MASK (PAGE_SIZE - 1)
+#define PAGE_SIZE_MAX PAGE_SIZE
+#define PAGE_SHIFT_MAX PAGE_SHIFT
#define NPTEPG (PAGE_SIZE/(sizeof (pt_entry_t)))
#define NPDEPG (PAGE_SIZE/(sizeof (pt_entry_t)))
diff --git a/sys/riscv/include/param.h b/sys/riscv/include/param.h
--- a/sys/riscv/include/param.h
+++ b/sys/riscv/include/param.h
@@ -80,6 +80,8 @@
#define PAGE_SHIFT 12
#define PAGE_SIZE (1 << PAGE_SHIFT) /* Page size */
#define PAGE_MASK (PAGE_SIZE - 1)
+#define PAGE_SIZE_MAX PAGE_SIZE
+#define PAGE_SHIFT_MAX PAGE_SHIFT
#define MAXPAGESIZES 3 /* maximum number of supported page sizes */

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