1#ifndef __MMU_H
 2#define __MMU_H
 3
 4#include <linux/errno.h>
 5
 6typedef 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
26static 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