1 #ifndef __MMU_H 2 #define __MMU_H 3 4 #include <linux/cpumask.h> 5 #include <linux/errno.h> 6 7 typedef struct { 8 spinlock_t lock; 9 cpumask_t cpu_attach_mask; 10 atomic_t flush_count; 11 unsigned int flush_mm; 12 struct list_head pgtable_list; 13 struct list_head gmap_list; 14 unsigned long gmap_asce; 15 unsigned long asce; 16 unsigned long asce_limit; 17 unsigned long vdso_base; 18 /* The mmu context allocates 4K page tables. */ 19 unsigned int alloc_pgste:1; 20 /* The mmu context uses extended page tables. */ 21 unsigned int has_pgste:1; 22 /* The mmu context uses storage keys. */ 23 unsigned int use_skey:1; 24 /* The mmu context uses CMMA. */ 25 unsigned int use_cmma:1; 26 } mm_context_t; 27 28 #define INIT_MM_CONTEXT(name) \ 29 .context.lock = __SPIN_LOCK_UNLOCKED(name.context.lock), \ 30 .context.pgtable_list = LIST_HEAD_INIT(name.context.pgtable_list), \ 31 .context.gmap_list = LIST_HEAD_INIT(name.context.gmap_list), 32 33 static inline int tprot(unsigned long addr) 34 { 35 int rc = -EFAULT; 36 37 asm volatile( 38 " tprot 0(%1),0\n" 39 "0: ipm %0\n" 40 " srl %0,28\n" 41 "1:\n" 42 EX_TABLE(0b,1b) 43 : "+d" (rc) : "a" (addr) : "cc"); 44 return rc; 45 } 46 47 #endif 48