1 #ifndef __MMU_H 2 #define __MMU_H 3 4 #include <linux/errno.h> 5 6 typedef struct { 7 atomic_t attach_count; 8 unsigned int flush_mm; 9 spinlock_t list_lock; 10 struct list_head pgtable_list; 11 struct list_head gmap_list; 12 unsigned long asce_bits; 13 unsigned long asce_limit; 14 unsigned long vdso_base; 15 /* The mmu context has extended page tables. */ 16 unsigned int has_pgste:1; 17 } mm_context_t; 18 19 #define INIT_MM_CONTEXT(name) \ 20 .context.list_lock = __SPIN_LOCK_UNLOCKED(name.context.list_lock), \ 21 .context.pgtable_list = LIST_HEAD_INIT(name.context.pgtable_list), \ 22 .context.gmap_list = LIST_HEAD_INIT(name.context.gmap_list), 23 24 static inline int tprot(unsigned long addr) 25 { 26 int rc = -EFAULT; 27 28 asm volatile( 29 " tprot 0(%1),0\n" 30 "0: ipm %0\n" 31 " srl %0,28\n" 32 "1:\n" 33 EX_TABLE(0b,1b) 34 : "+d" (rc) : "a" (addr) : "cc"); 35 return rc; 36 } 37 38 #endif 39