1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */
2*4882a593Smuzhiyun #ifndef __MMU_H
3*4882a593Smuzhiyun #define __MMU_H
4*4882a593Smuzhiyun
5*4882a593Smuzhiyun /*
6*4882a593Smuzhiyun * Privileged Space Mapping Buffer (PMB) definitions
7*4882a593Smuzhiyun */
8*4882a593Smuzhiyun #define PMB_PASCR 0xff000070
9*4882a593Smuzhiyun #define PMB_IRMCR 0xff000078
10*4882a593Smuzhiyun
11*4882a593Smuzhiyun #define PASCR_SE 0x80000000
12*4882a593Smuzhiyun
13*4882a593Smuzhiyun #define PMB_ADDR 0xf6100000
14*4882a593Smuzhiyun #define PMB_DATA 0xf7100000
15*4882a593Smuzhiyun
16*4882a593Smuzhiyun #define NR_PMB_ENTRIES 16
17*4882a593Smuzhiyun
18*4882a593Smuzhiyun #define PMB_E_MASK 0x0000000f
19*4882a593Smuzhiyun #define PMB_E_SHIFT 8
20*4882a593Smuzhiyun
21*4882a593Smuzhiyun #define PMB_PFN_MASK 0xff000000
22*4882a593Smuzhiyun
23*4882a593Smuzhiyun #define PMB_SZ_16M 0x00000000
24*4882a593Smuzhiyun #define PMB_SZ_64M 0x00000010
25*4882a593Smuzhiyun #define PMB_SZ_128M 0x00000080
26*4882a593Smuzhiyun #define PMB_SZ_512M 0x00000090
27*4882a593Smuzhiyun #define PMB_SZ_MASK PMB_SZ_512M
28*4882a593Smuzhiyun #define PMB_C 0x00000008
29*4882a593Smuzhiyun #define PMB_WT 0x00000001
30*4882a593Smuzhiyun #define PMB_UB 0x00000200
31*4882a593Smuzhiyun #define PMB_CACHE_MASK (PMB_C | PMB_WT | PMB_UB)
32*4882a593Smuzhiyun #define PMB_V 0x00000100
33*4882a593Smuzhiyun
34*4882a593Smuzhiyun #define PMB_NO_ENTRY (-1)
35*4882a593Smuzhiyun
36*4882a593Smuzhiyun #ifndef __ASSEMBLY__
37*4882a593Smuzhiyun #include <linux/errno.h>
38*4882a593Smuzhiyun #include <linux/threads.h>
39*4882a593Smuzhiyun #include <asm/page.h>
40*4882a593Smuzhiyun
41*4882a593Smuzhiyun /* Default "unsigned long" context */
42*4882a593Smuzhiyun typedef unsigned long mm_context_id_t[NR_CPUS];
43*4882a593Smuzhiyun
44*4882a593Smuzhiyun typedef struct {
45*4882a593Smuzhiyun #ifdef CONFIG_MMU
46*4882a593Smuzhiyun mm_context_id_t id;
47*4882a593Smuzhiyun void *vdso;
48*4882a593Smuzhiyun #else
49*4882a593Smuzhiyun unsigned long end_brk;
50*4882a593Smuzhiyun #endif
51*4882a593Smuzhiyun #ifdef CONFIG_BINFMT_ELF_FDPIC
52*4882a593Smuzhiyun unsigned long exec_fdpic_loadmap;
53*4882a593Smuzhiyun unsigned long interp_fdpic_loadmap;
54*4882a593Smuzhiyun #endif
55*4882a593Smuzhiyun } mm_context_t;
56*4882a593Smuzhiyun
57*4882a593Smuzhiyun #ifdef CONFIG_PMB
58*4882a593Smuzhiyun /* arch/sh/mm/pmb.c */
59*4882a593Smuzhiyun bool __in_29bit_mode(void);
60*4882a593Smuzhiyun
61*4882a593Smuzhiyun void pmb_init(void);
62*4882a593Smuzhiyun int pmb_bolt_mapping(unsigned long virt, phys_addr_t phys,
63*4882a593Smuzhiyun unsigned long size, pgprot_t prot);
64*4882a593Smuzhiyun void __iomem *pmb_remap_caller(phys_addr_t phys, unsigned long size,
65*4882a593Smuzhiyun pgprot_t prot, void *caller);
66*4882a593Smuzhiyun int pmb_unmap(void __iomem *addr);
67*4882a593Smuzhiyun
68*4882a593Smuzhiyun #else
69*4882a593Smuzhiyun
70*4882a593Smuzhiyun static inline int
pmb_bolt_mapping(unsigned long virt,phys_addr_t phys,unsigned long size,pgprot_t prot)71*4882a593Smuzhiyun pmb_bolt_mapping(unsigned long virt, phys_addr_t phys,
72*4882a593Smuzhiyun unsigned long size, pgprot_t prot)
73*4882a593Smuzhiyun {
74*4882a593Smuzhiyun return -EINVAL;
75*4882a593Smuzhiyun }
76*4882a593Smuzhiyun
77*4882a593Smuzhiyun static inline void __iomem *
pmb_remap_caller(phys_addr_t phys,unsigned long size,pgprot_t prot,void * caller)78*4882a593Smuzhiyun pmb_remap_caller(phys_addr_t phys, unsigned long size,
79*4882a593Smuzhiyun pgprot_t prot, void *caller)
80*4882a593Smuzhiyun {
81*4882a593Smuzhiyun return NULL;
82*4882a593Smuzhiyun }
83*4882a593Smuzhiyun
pmb_unmap(void __iomem * addr)84*4882a593Smuzhiyun static inline int pmb_unmap(void __iomem *addr)
85*4882a593Smuzhiyun {
86*4882a593Smuzhiyun return -EINVAL;
87*4882a593Smuzhiyun }
88*4882a593Smuzhiyun
89*4882a593Smuzhiyun #define pmb_init(addr) do { } while (0)
90*4882a593Smuzhiyun
91*4882a593Smuzhiyun #ifdef CONFIG_29BIT
92*4882a593Smuzhiyun #define __in_29bit_mode() (1)
93*4882a593Smuzhiyun #else
94*4882a593Smuzhiyun #define __in_29bit_mode() (0)
95*4882a593Smuzhiyun #endif
96*4882a593Smuzhiyun
97*4882a593Smuzhiyun #endif /* CONFIG_PMB */
98*4882a593Smuzhiyun
99*4882a593Smuzhiyun static inline void __iomem *
pmb_remap(phys_addr_t phys,unsigned long size,pgprot_t prot)100*4882a593Smuzhiyun pmb_remap(phys_addr_t phys, unsigned long size, pgprot_t prot)
101*4882a593Smuzhiyun {
102*4882a593Smuzhiyun return pmb_remap_caller(phys, size, prot, __builtin_return_address(0));
103*4882a593Smuzhiyun }
104*4882a593Smuzhiyun
105*4882a593Smuzhiyun #endif /* __ASSEMBLY__ */
106*4882a593Smuzhiyun
107*4882a593Smuzhiyun #endif /* __MMU_H */
108