1. 根目录:
2. arch
3. powerpc
4. mm
5. vphn.h

#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