Jonathan Austin | a2b45b0 | 2013-02-21 17:49:24 +0000 | [diff] [blame] | 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 |
Jonathan Austin | 9dfc28b | 2013-04-18 18:37:24 +0100 | [diff] [blame] | 49 | #define MPU_VECTORS_REGION 3 |
Jonathan Austin | a2b45b0 | 2013-02-21 17:49:24 +0000 | [diff] [blame] | 50 | |
| 51 | /* Maximum number of regions Linux is interested in */ |
| 52 | #define MPU_MAX_REGIONS 16 |
| 53 | |
Jonathan Austin | 67c9845 | 2013-02-22 17:48:56 +0000 | [diff] [blame] | 54 | #define MPU_DATA_SIDE 0 |
| 55 | #define MPU_INSTR_SIDE 1 |
| 56 | |
Jonathan Austin | a2b45b0 | 2013-02-21 17:49:24 +0000 | [diff] [blame] | 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 |