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