projects / mirror_ubuntu-focal-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| a2b45b0d JA |
2 | #ifndef __ARM_MPU_H |
| 3 | #define __ARM_MPU_H | |
| 4 | ||
| 5 | #ifdef CONFIG_ARM_MPU | |
| 6 | ||
| 7 | /* MPUIR layout */ | |
| 8 | #define MPUIR_nU 1 | |
| 9 | #define MPUIR_DREGION 8 | |
| 10 | #define MPUIR_IREGION 16 | |
| 11 | #define MPUIR_DREGION_SZMASK (0xFF << MPUIR_DREGION) | |
| 12 | #define MPUIR_IREGION_SZMASK (0xFF << MPUIR_IREGION) | |
| 13 | ||
| 14 | /* ID_MMFR0 data relevant to MPU */ | |
| 15 | #define MMFR0_PMSA (0xF << 4) | |
| 16 | #define MMFR0_PMSAv7 (3 << 4) | |
| 17 | ||
| 18 | /* MPU D/I Size Register fields */ | |
| 19 | #define MPU_RSR_SZ 1 | |
| 20 | #define MPU_RSR_EN 0 | |
| 21 | ||
| 22 | /* The D/I RSR value for an enabled region spanning the whole of memory */ | |
| 23 | #define MPU_RSR_ALL_MEM 63 | |
| 24 | ||
| 25 | /* Individual bits in the DR/IR ACR */ | |
| 26 | #define MPU_ACR_XN (1 << 12) | |
| 27 | #define MPU_ACR_SHARED (1 << 2) | |
| 28 | ||
| 29 | /* C, B and TEX[2:0] bits only have semantic meanings when grouped */ | |
| 30 | #define MPU_RGN_CACHEABLE 0xB | |
| 31 | #define MPU_RGN_SHARED_CACHEABLE (MPU_RGN_CACHEABLE | MPU_ACR_SHARED) | |
| 32 | #define MPU_RGN_STRONGLY_ORDERED 0 | |
| 33 | ||
| 34 | /* Main region should only be shared for SMP */ | |
| 35 | #ifdef CONFIG_SMP | |
| 36 | #define MPU_RGN_NORMAL (MPU_RGN_CACHEABLE | MPU_ACR_SHARED) | |
| 37 | #else | |
| 38 | #define MPU_RGN_NORMAL MPU_RGN_CACHEABLE | |
| 39 | #endif | |
| 40 | ||
| 41 | /* Access permission bits of ACR (only define those that we use)*/ | |
| 42 | #define MPU_AP_PL1RW_PL0RW (0x3 << 8) | |
| 43 | #define MPU_AP_PL1RW_PL0R0 (0x2 << 8) | |
| 44 | #define MPU_AP_PL1RW_PL0NA (0x1 << 8) | |
| 45 | ||
| 46 | /* For minimal static MPU region configurations */ | |
| 47 | #define MPU_PROBE_REGION 0 | |
| 48 | #define MPU_BG_REGION 1 | |
| 49 | #define MPU_RAM_REGION 2 | |
| 9dfc28b6 | 50 | #define MPU_VECTORS_REGION 3 |
| a2b45b0d JA |
51 | |
| 52 | /* Maximum number of regions Linux is interested in */ | |
| 53 | #define MPU_MAX_REGIONS 16 | |
| 54 | ||
| 67c9845b JA |
55 | #define MPU_DATA_SIDE 0 |
| 56 | #define MPU_INSTR_SIDE 1 | |
| 57 | ||
| a2b45b0d JA |
58 | #ifndef __ASSEMBLY__ |
| 59 | ||
| 60 | struct mpu_rgn { | |
| 61 | /* Assume same attributes for d/i-side */ | |
| 62 | u32 drbar; | |
| 63 | u32 drsr; | |
| 64 | u32 dracr; | |
| 65 | }; | |
| 66 | ||
| 67 | struct mpu_rgn_info { | |
| 68 | u32 mpuir; | |
| 69 | struct mpu_rgn rgns[MPU_MAX_REGIONS]; | |
| 70 | }; | |
| 71 | extern struct mpu_rgn_info mpu_rgn_info; | |
| 72 | ||
| 73 | #endif /* __ASSEMBLY__ */ | |
| 74 | ||
| 75 | #endif /* CONFIG_ARM_MPU */ | |
| 76 | ||
| 77 | #endif |