| #ifndef __MMU_H |
| #define __MMU_H |
| |
| #include <linux/errno.h> |
| |
| typedef struct { |
| atomic_t attach_count; |
| unsigned int flush_mm; |
| spinlock_t list_lock; |
| struct list_head pgtable_list; |
| struct list_head gmap_list; |
| unsigned long asce_bits; |
| unsigned long asce_limit; |
| unsigned long vdso_base; |
| /* Cloned contexts will be created with extended page tables. */ |
| unsigned int alloc_pgste:1; |
| /* The mmu context has extended page tables. */ |
| unsigned int has_pgste:1; |
| } mm_context_t; |
| |
| #define INIT_MM_CONTEXT(name) \ |
| .context.list_lock = __SPIN_LOCK_UNLOCKED(name.context.list_lock), \ |
| .context.pgtable_list = LIST_HEAD_INIT(name.context.pgtable_list), \ |
| .context.gmap_list = LIST_HEAD_INIT(name.context.gmap_list), |
| |
| static inline int tprot(unsigned long addr) |
| { |
| int rc = -EFAULT; |
| |
| asm volatile( |
| " tprot 0(%1),0\n" |
| "0: ipm %0\n" |
| " srl %0,28\n" |
| "1:\n" |
| EX_TABLE(0b,1b) |
| : "+d" (rc) : "a" (addr) : "cc"); |
| return rc; |
| } |
| |
| #endif |
