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 /* Cloned contexts will be created with extended page tables. */ 16 unsigned int alloc_pgste:1; 17 /* The mmu context has extended page tables. */ 18 unsigned int has_pgste:1; 19 } mm_context_t; 20 21 #define INIT_MM_CONTEXT(name) \ 22 .context.list_lock = __SPIN_LOCK_UNLOCKED(name.context.list_lock), \ 23 .context.pgtable_list = LIST_HEAD_INIT(name.context.pgtable_list), \ 24 .context.gmap_list = LIST_HEAD_INIT(name.context.gmap_list), 25 26 static inline int tprot(unsigned long addr) 27 { 28 int rc = -EFAULT; 29 30 asm volatile( 31 " tprot 0(%1),0\n" 32 "0: ipm %0\n" 33 " srl %0,28\n" 34 "1:\n" 35 EX_TABLE(0b,1b) 36 : "+d" (rc) : "a" (addr) : "cc"); 37 return rc; 38 } 39 40 #endif 41