/* SPDX-License-Identifier: GPL-2.0 */ #ifndef __ARM_MPU_H #define __ARM_MPU_H /* MPUIR layout */ #define MPUIR_nU 1 #define MPUIR_DREGION 8 #define MPUIR_IREGION 16 #define MPUIR_DREGION_SZMASK (0xFF << MPUIR_DREGION) #define MPUIR_IREGION_SZMASK (0xFF << MPUIR_IREGION) /* ID_MMFR0 data relevant to MPU */ #define MMFR0_PMSA (0xF << 4) #define MMFR0_PMSAv7 (3 << 4) /* MPU D/I Size Register fields */ #define MPU_RSR_SZ 1 #define MPU_RSR_EN 0 #define MPU_RSR_SD 8 /* Number of subregions (SD) */ #define MPU_NR_SUBREGS 8 #define MPU_MIN_SUBREG_SIZE 256 /* The D/I RSR value for an enabled region spanning the whole of memory */ #define MPU_RSR_ALL_MEM 63 /* Individual bits in the DR/IR ACR */ #define MPU_ACR_XN (1 << 12) #define MPU_ACR_SHARED (1 << 2) /* C, B and TEX[2:0] bits only have semantic meanings when grouped */ #define MPU_RGN_CACHEABLE 0xB #define MPU_RGN_SHARED_CACHEABLE (MPU_RGN_CACHEABLE | MPU_ACR_SHARED) #define MPU_RGN_STRONGLY_ORDERED 0 /* Main region should only be shared for SMP */ #ifdef CONFIG_SMP #define MPU_RGN_NORMAL (MPU_RGN_CACHEABLE | MPU_ACR_SHARED) #else #define MPU_RGN_NORMAL MPU_RGN_CACHEABLE #endif /* Access permission bits of ACR (only define those that we use)*/ #define MPU_AP_PL1RO_PL0NA (0x5 << 8) #define MPU_AP_PL1RW_PL0RW (0x3 << 8) #define MPU_AP_PL1RW_PL0R0 (0x2 << 8) #define MPU_AP_PL1RW_PL0NA (0x1 << 8) /* For minimal static MPU region configurations */ #define MPU_PROBE_REGION 0 #define MPU_BG_REGION 1 #define MPU_RAM_REGION 2 #define MPU_ROM_REGION 3 /* Maximum number of regions Linux is interested in */ #define MPU_MAX_REGIONS 16 #define MPU_DATA_SIDE 0 #define MPU_INSTR_SIDE 1 #ifndef __ASSEMBLY__ struct mpu_rgn { /* Assume same attributes for d/i-side */ u32 drbar; u32 drsr; u32 dracr; }; struct mpu_rgn_info { unsigned int used; struct mpu_rgn rgns[MPU_MAX_REGIONS]; }; extern struct mpu_rgn_info mpu_rgn_info; #ifdef CONFIG_ARM_MPU extern void __init adjust_lowmem_bounds_mpu(void); extern void __init mpu_setup(void); #else
static inline void adjust_lowmem_bounds_mpu(void) {}Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Vladimir Murzin | 8 | 100.00% | 1 | 100.00% |
| Total | 8 | 100.00% | 1 | 100.00% |
| Person | Tokens | Prop | Commits | CommitProp |
| Vladimir Murzin | 8 | 100.00% | 1 | 100.00% |
| Total | 8 | 100.00% | 1 | 100.00% |
| Person | Tokens | Prop | Commits | CommitProp |
| Jonathan Austin | 172 | 73.82% | 3 | 37.50% |
| Vladimir Murzin | 60 | 25.75% | 4 | 50.00% |
| Greg Kroah-Hartman | 1 | 0.43% | 1 | 12.50% |
| Total | 233 | 100.00% | 8 | 100.00% |