tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#ifndef __MMU_H
2#define __MMU_H
3
4#if !defined(CONFIG_MMU)
5
6typedef struct {
7 struct vm_list_struct *vmlist;
8 unsigned long end_brk;
9} mm_context_t;
10
11#else
12
13/* Default "unsigned long" context */
14typedef unsigned long mm_context_id_t;
15
16typedef struct {
17 mm_context_id_t id;
18 void *vdso;
19} mm_context_t;
20
21#endif /* CONFIG_MMU */
22
23/*
24 * Privileged Space Mapping Buffer (PMB) definitions
25 */
26#define PMB_PASCR 0xff000070
27#define PMB_IRMCR 0xff000078
28
29#define PMB_ADDR 0xf6100000
30#define PMB_DATA 0xf7100000
31#define PMB_ENTRY_MAX 16
32#define PMB_E_MASK 0x0000000f
33#define PMB_E_SHIFT 8
34
35#define PMB_SZ_16M 0x00000000
36#define PMB_SZ_64M 0x00000010
37#define PMB_SZ_128M 0x00000080
38#define PMB_SZ_512M 0x00000090
39#define PMB_SZ_MASK PMB_SZ_512M
40#define PMB_C 0x00000008
41#define PMB_WT 0x00000001
42#define PMB_UB 0x00000200
43#define PMB_V 0x00000100
44
45#define PMB_NO_ENTRY (-1)
46
47struct pmb_entry;
48
49struct pmb_entry {
50 unsigned long vpn;
51 unsigned long ppn;
52 unsigned long flags;
53
54 /*
55 * 0 .. NR_PMB_ENTRIES for specific entry selection, or
56 * PMB_NO_ENTRY to search for a free one
57 */
58 int entry;
59
60 struct pmb_entry *next;
61 /* Adjacent entry link for contiguous multi-entry mappings */
62 struct pmb_entry *link;
63};
64
65/* arch/sh/mm/pmb.c */
66int __set_pmb_entry(unsigned long vpn, unsigned long ppn,
67 unsigned long flags, int *entry);
68int set_pmb_entry(struct pmb_entry *pmbe);
69void clear_pmb_entry(struct pmb_entry *pmbe);
70struct pmb_entry *pmb_alloc(unsigned long vpn, unsigned long ppn,
71 unsigned long flags);
72void pmb_free(struct pmb_entry *pmbe);
73long pmb_remap(unsigned long virt, unsigned long phys,
74 unsigned long size, unsigned long flags);
75void pmb_unmap(unsigned long addr);
76
77#endif /* __MMU_H */
78