1#ifndef __MMU_H
2#define __MMU_H
3
4/* Default "unsigned long" context */
5typedef unsigned long mm_context_id_t[NR_CPUS];
6
7typedef struct {
8#ifdef CONFIG_MMU
9	mm_context_id_t		id;
10	void			*vdso;
11#else
12	struct vm_list_struct	*vmlist;
13	unsigned long		end_brk;
14#endif
15} mm_context_t;
16
17/*
18 * Privileged Space Mapping Buffer (PMB) definitions
19 */
20#define PMB_PASCR		0xff000070
21#define PMB_IRMCR		0xff000078
22
23#define PMB_ADDR		0xf6100000
24#define PMB_DATA		0xf7100000
25#define PMB_ENTRY_MAX		16
26#define PMB_E_MASK		0x0000000f
27#define PMB_E_SHIFT		8
28
29#define PMB_SZ_16M		0x00000000
30#define PMB_SZ_64M		0x00000010
31#define PMB_SZ_128M		0x00000080
32#define PMB_SZ_512M		0x00000090
33#define PMB_SZ_MASK		PMB_SZ_512M
34#define PMB_C			0x00000008
35#define PMB_WT			0x00000001
36#define PMB_UB			0x00000200
37#define PMB_V			0x00000100
38
39#define PMB_NO_ENTRY		(-1)
40
41struct pmb_entry;
42
43struct pmb_entry {
44	unsigned long vpn;
45	unsigned long ppn;
46	unsigned long flags;
47
48	/*
49	 * 0 .. NR_PMB_ENTRIES for specific entry selection, or
50	 * PMB_NO_ENTRY to search for a free one
51	 */
52	int entry;
53
54	struct pmb_entry *next;
55	/* Adjacent entry link for contiguous multi-entry mappings */
56	struct pmb_entry *link;
57};
58
59/* arch/sh/mm/pmb.c */
60int __set_pmb_entry(unsigned long vpn, unsigned long ppn,
61		    unsigned long flags, int *entry);
62int set_pmb_entry(struct pmb_entry *pmbe);
63void clear_pmb_entry(struct pmb_entry *pmbe);
64struct pmb_entry *pmb_alloc(unsigned long vpn, unsigned long ppn,
65			    unsigned long flags);
66void pmb_free(struct pmb_entry *pmbe);
67long pmb_remap(unsigned long virt, unsigned long phys,
68	       unsigned long size, unsigned long flags);
69void pmb_unmap(unsigned long addr);
70
71#endif /* __MMU_H */
72