1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __MMU_H
3 #define __MMU_H
4
5 /*
6 * Privileged Space Mapping Buffer (PMB) definitions
7 */
8 #define PMB_PASCR 0xff000070
9 #define PMB_IRMCR 0xff000078
10
11 #define PASCR_SE 0x80000000
12
13 #define PMB_ADDR 0xf6100000
14 #define PMB_DATA 0xf7100000
15
16 #define NR_PMB_ENTRIES 16
17
18 #define PMB_E_MASK 0x0000000f
19 #define PMB_E_SHIFT 8
20
21 #define PMB_PFN_MASK 0xff000000
22
23 #define PMB_SZ_16M 0x00000000
24 #define PMB_SZ_64M 0x00000010
25 #define PMB_SZ_128M 0x00000080
26 #define PMB_SZ_512M 0x00000090
27 #define PMB_SZ_MASK PMB_SZ_512M
28 #define PMB_C 0x00000008
29 #define PMB_WT 0x00000001
30 #define PMB_UB 0x00000200
31 #define PMB_CACHE_MASK (PMB_C | PMB_WT | PMB_UB)
32 #define PMB_V 0x00000100
33
34 #define PMB_NO_ENTRY (-1)
35
36 #ifndef __ASSEMBLY__
37 #include <linux/errno.h>
38 #include <linux/threads.h>
39 #include <asm/page.h>
40
41 /* Default "unsigned long" context */
42 typedef unsigned long mm_context_id_t[NR_CPUS];
43
44 typedef struct {
45 #ifdef CONFIG_MMU
46 mm_context_id_t id;
47 void *vdso;
48 #else
49 unsigned long end_brk;
50 #endif
51 #ifdef CONFIG_BINFMT_ELF_FDPIC
52 unsigned long exec_fdpic_loadmap;
53 unsigned long interp_fdpic_loadmap;
54 #endif
55 } mm_context_t;
56
57 #ifdef CONFIG_PMB
58 /* arch/sh/mm/pmb.c */
59 bool __in_29bit_mode(void);
60
61 void pmb_init(void);
62 int pmb_bolt_mapping(unsigned long virt, phys_addr_t phys,
63 unsigned long size, pgprot_t prot);
64 void __iomem *pmb_remap_caller(phys_addr_t phys, unsigned long size,
65 pgprot_t prot, void *caller);
66 int pmb_unmap(void __iomem *addr);
67
68 #else
69
70 static inline int
71 pmb_bolt_mapping(unsigned long virt, phys_addr_t phys,
72 unsigned long size, pgprot_t prot)
73 {
74 return -EINVAL;
75 }
76
77 static inline void __iomem *
78 pmb_remap_caller(phys_addr_t phys, unsigned long size,
79 pgprot_t prot, void *caller)
80 {
81 return NULL;
82 }
83
84 static inline int pmb_unmap(void __iomem *addr)
85 {
86 return -EINVAL;
87 }
88
89 #define pmb_init(addr) do { } while (0)
90
91 #ifdef CONFIG_29BIT
92 #define __in_29bit_mode() (1)
93 #else
94 #define __in_29bit_mode() (0)
95 #endif
96
97 #endif /* CONFIG_PMB */
98
99 static inline void __iomem *
100 pmb_remap(phys_addr_t phys, unsigned long size, pgprot_t prot)
101 {
102 return pmb_remap_caller(phys, size, prot, __builtin_return_address(0));
103 }
104
105 #endif /* __ASSEMBLY__ */
106
107 #endif /* __MMU_H */
108
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