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-rw-r--r--arch/powerpc/mm/vphn.h17
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/powerpc/mm/vphn.h b/arch/powerpc/mm/vphn.h
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+++ b/arch/powerpc/mm/vphn.h
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+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ARCH_POWERPC_MM_VPHN_H_
+#define _ARCH_POWERPC_MM_VPHN_H_
+
+/* The H_HOME_NODE_ASSOCIATIVITY h_call returns 6 64-bit registers.
+ */
+#define VPHN_REGISTER_COUNT 6
+
+/*
+ * 6 64-bit registers unpacked into up to 24 be32 associativity values. To
+ * form the complete property we have to add the length in the first cell.
+ */
+#define VPHN_ASSOC_BUFSIZE (VPHN_REGISTER_COUNT*sizeof(u64)/sizeof(u16) + 1)
+
+extern int vphn_unpack_associativity(const long *packed, __be32 *unpacked);
+
+#endif