Commit | Line | Data |
---|---|---|
a2b45b0d JA |
1 | #ifndef __ARM_MPU_H |
2 | #define __ARM_MPU_H | |
3 | ||
4 | #ifdef CONFIG_ARM_MPU | |
5 | ||
6 | /* MPUIR layout */ | |
7 | #define MPUIR_nU 1 | |
8 | #define MPUIR_DREGION 8 | |
9 | #define MPUIR_IREGION 16 | |
10 | #define MPUIR_DREGION_SZMASK (0xFF << MPUIR_DREGION) | |
11 | #define MPUIR_IREGION_SZMASK (0xFF << MPUIR_IREGION) | |
12 | ||
13 | /* ID_MMFR0 data relevant to MPU */ | |
14 | #define MMFR0_PMSA (0xF << 4) | |
15 | #define MMFR0_PMSAv7 (3 << 4) | |
16 | ||
17 | /* MPU D/I Size Register fields */ | |
18 | #define MPU_RSR_SZ 1 | |
19 | #define MPU_RSR_EN 0 | |
20 | ||
21 | /* The D/I RSR value for an enabled region spanning the whole of memory */ | |
22 | #define MPU_RSR_ALL_MEM 63 | |
23 | ||
24 | /* Individual bits in the DR/IR ACR */ | |
25 | #define MPU_ACR_XN (1 << 12) | |
26 | #define MPU_ACR_SHARED (1 << 2) | |
27 | ||
28 | /* C, B and TEX[2:0] bits only have semantic meanings when grouped */ | |
29 | #define MPU_RGN_CACHEABLE 0xB | |
30 | #define MPU_RGN_SHARED_CACHEABLE (MPU_RGN_CACHEABLE | MPU_ACR_SHARED) | |
31 | #define MPU_RGN_STRONGLY_ORDERED 0 | |
32 | ||
33 | /* Main region should only be shared for SMP */ | |
34 | #ifdef CONFIG_SMP | |
35 | #define MPU_RGN_NORMAL (MPU_RGN_CACHEABLE | MPU_ACR_SHARED) | |
36 | #else | |
37 | #define MPU_RGN_NORMAL MPU_RGN_CACHEABLE | |
38 | #endif | |
39 | ||
40 | /* Access permission bits of ACR (only define those that we use)*/ | |
41 | #define MPU_AP_PL1RW_PL0RW (0x3 << 8) | |
42 | #define MPU_AP_PL1RW_PL0R0 (0x2 << 8) | |
43 | #define MPU_AP_PL1RW_PL0NA (0x1 << 8) | |
44 | ||
45 | /* For minimal static MPU region configurations */ | |
46 | #define MPU_PROBE_REGION 0 | |
47 | #define MPU_BG_REGION 1 | |
48 | #define MPU_RAM_REGION 2 | |
9dfc28b6 | 49 | #define MPU_VECTORS_REGION 3 |
a2b45b0d JA |
50 | |
51 | /* Maximum number of regions Linux is interested in */ | |
52 | #define MPU_MAX_REGIONS 16 | |
53 | ||
67c9845b JA |
54 | #define MPU_DATA_SIDE 0 |
55 | #define MPU_INSTR_SIDE 1 | |
56 | ||
a2b45b0d JA |
57 | #ifndef __ASSEMBLY__ |
58 | ||
59 | struct mpu_rgn { | |
60 | /* Assume same attributes for d/i-side */ | |
61 | u32 drbar; | |
62 | u32 drsr; | |
63 | u32 dracr; | |
64 | }; | |
65 | ||
66 | struct mpu_rgn_info { | |
67 | u32 mpuir; | |
68 | struct mpu_rgn rgns[MPU_MAX_REGIONS]; | |
69 | }; | |
70 | extern struct mpu_rgn_info mpu_rgn_info; | |
71 | ||
72 | #endif /* __ASSEMBLY__ */ | |
73 | ||
74 | #endif /* CONFIG_ARM_MPU */ | |
75 | ||
76 | #endif |