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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 */
42typedef unsigned long mm_context_id_t[NR_CPUS];
43
44typedef 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 */
59bool __in_29bit_mode(void);
60
61void pmb_init(void);
62int pmb_bolt_mapping(unsigned long virt, phys_addr_t phys,
63 unsigned long size, pgprot_t prot);
64void __iomem *pmb_remap_caller(phys_addr_t phys, unsigned long size,
65 pgprot_t prot, void *caller);
66int pmb_unmap(void __iomem *addr);
67
68#else
69
70static inline int
71pmb_bolt_mapping(unsigned long virt, phys_addr_t phys,
72 unsigned long size, pgprot_t prot)
73{
74 return -EINVAL;
75}
76
77static inline void __iomem *
78pmb_remap_caller(phys_addr_t phys, unsigned long size,
79 pgprot_t prot, void *caller)
80{
81 return NULL;
82}
83
84static 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
99static inline void __iomem *
100pmb_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 */
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 */
42typedef unsigned long mm_context_id_t[NR_CPUS];
43
44typedef 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 */
59bool __in_29bit_mode(void);
60
61void pmb_init(void);
62int pmb_bolt_mapping(unsigned long virt, phys_addr_t phys,
63 unsigned long size, pgprot_t prot);
64void __iomem *pmb_remap_caller(phys_addr_t phys, unsigned long size,
65 pgprot_t prot, void *caller);
66int pmb_unmap(void __iomem *addr);
67
68#else
69
70static inline int
71pmb_bolt_mapping(unsigned long virt, phys_addr_t phys,
72 unsigned long size, pgprot_t prot)
73{
74 return -EINVAL;
75}
76
77static inline void __iomem *
78pmb_remap_caller(phys_addr_t phys, unsigned long size,
79 pgprot_t prot, void *caller)
80{
81 return NULL;
82}
83
84static 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
99static inline void __iomem *
100pmb_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 */