diff options
Diffstat (limited to 'arch/arm/include/asm/mpu.h')
| -rw-r--r-- | arch/arm/include/asm/mpu.h | 27 |
1 files changed, 21 insertions, 6 deletions
diff --git a/arch/arm/include/asm/mpu.h b/arch/arm/include/asm/mpu.h index c3247cc2fe08..6d1491c8ee22 100644 --- a/arch/arm/include/asm/mpu.h +++ b/arch/arm/include/asm/mpu.h @@ -1,8 +1,7 @@ +/* SPDX-License-Identifier: GPL-2.0 */ #ifndef __ARM_MPU_H #define __ARM_MPU_H -#ifdef CONFIG_ARM_MPU - /* MPUIR layout */ #define MPUIR_nU 1 #define MPUIR_DREGION 8 @@ -17,6 +16,11 @@ /* 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 @@ -38,6 +42,7 @@ #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) @@ -46,7 +51,7 @@ #define MPU_PROBE_REGION 0 #define MPU_BG_REGION 1 #define MPU_RAM_REGION 2 -#define MPU_VECTORS_REGION 3 +#define MPU_ROM_REGION 3 /* Maximum number of regions Linux is interested in */ #define MPU_MAX_REGIONS 16 @@ -64,13 +69,23 @@ struct mpu_rgn { }; struct mpu_rgn_info { - u32 mpuir; + unsigned int used; struct mpu_rgn rgns[MPU_MAX_REGIONS]; }; extern struct mpu_rgn_info mpu_rgn_info; -#endif /* __ASSEMBLY__ */ +#ifdef CONFIG_ARM_MPU + +extern void __init adjust_lowmem_bounds_mpu(void); +extern void __init mpu_setup(void); -#endif /* CONFIG_ARM_MPU */ +#else + +static inline void adjust_lowmem_bounds_mpu(void) {} +static inline void mpu_setup(void) {} + +#endif /* !CONFIG_ARM_MPU */ + +#endif /* __ASSEMBLY__ */ #endif |