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usr
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src
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linux-headers-6.8.0-36
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arch
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arm
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include
/
asm
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mpu.h
/* 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) #define MMFR0_PMSAv8 (4 << 4) /* MPU D/I Size Register fields */ #define PMSAv7_RSR_SZ 1 #define PMSAv7_RSR_EN 0 #define PMSAv7_RSR_SD 8 /* Number of subregions (SD) */ #define PMSAv7_NR_SUBREGS 8 #define PMSAv7_MIN_SUBREG_SIZE 256 /* The D/I RSR value for an enabled region spanning the whole of memory */ #define PMSAv7_RSR_ALL_MEM 63 /* Individual bits in the DR/IR ACR */ #define PMSAv7_ACR_XN (1 << 12) #define PMSAv7_ACR_SHARED (1 << 2) /* C, B and TEX[2:0] bits only have semantic meanings when grouped */ #define PMSAv7_RGN_CACHEABLE 0xB #define PMSAv7_RGN_SHARED_CACHEABLE (PMSAv7_RGN_CACHEABLE | PMSAv7_ACR_SHARED) #define PMSAv7_RGN_STRONGLY_ORDERED 0 /* Main region should only be shared for SMP */ #ifdef CONFIG_SMP #define PMSAv7_RGN_NORMAL (PMSAv7_RGN_CACHEABLE | PMSAv7_ACR_SHARED) #else #define PMSAv7_RGN_NORMAL PMSAv7_RGN_CACHEABLE #endif /* Access permission bits of ACR (only define those that we use)*/ #define PMSAv7_AP_PL1RO_PL0NA (0x5 << 8) #define PMSAv7_AP_PL1RW_PL0RW (0x3 << 8) #define PMSAv7_AP_PL1RW_PL0R0 (0x2 << 8) #define PMSAv7_AP_PL1RW_PL0NA (0x1 << 8) #define PMSAv8_BAR_XN 1 #define PMSAv8_LAR_EN 1 #define PMSAv8_LAR_IDX(n) (((n) & 0x7) << 1) #define PMSAv8_AP_PL1RW_PL0NA (0 << 1) #define PMSAv8_AP_PL1RW_PL0RW (1 << 1) #define PMSAv8_AP_PL1RO_PL0RO (3 << 1) #ifdef CONFIG_SMP #define PMSAv8_RGN_SHARED (3 << 3) // inner sharable #else #define PMSAv8_RGN_SHARED (0 << 3) #endif #define PMSAv8_RGN_DEVICE_nGnRnE 0 #define PMSAv8_RGN_NORMAL 1 #define PMSAv8_MAIR(attr, mt) ((attr) << ((mt) * 8)) #ifdef CONFIG_CPU_V7M #define PMSAv8_MINALIGN 32 #else #define PMSAv8_MINALIGN 64 #endif /* For minimal static MPU region configurations */ #define PMSAv7_PROBE_REGION 0 #define PMSAv7_BG_REGION 1 #define PMSAv7_RAM_REGION 2 #define PMSAv7_ROM_REGION 3 /* Fixed for PMSAv8 only */ #define PMSAv8_XIP_REGION 0 #define PMSAv8_KERNEL_REGION 1 /* Maximum number of regions Linux is interested in */ #define MPU_MAX_REGIONS 16 #define PMSAv7_DATA_SIDE 0 #define PMSAv7_INSTR_SIDE 1 #ifndef __ASSEMBLY__ struct mpu_rgn { /* Assume same attributes for d/i-side */ union { u32 drbar; /* PMSAv7 */ u32 prbar; /* PMSAv8 */ }; union { u32 drsr; /* PMSAv7 */ u32 prlar; /* PMSAv8 */ }; union { u32 dracr; /* PMSAv7 */ u32 unused; /* not used in PMSAv8 */ }; }; 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 pmsav7_adjust_lowmem_bounds(void); extern void __init pmsav8_adjust_lowmem_bounds(void); extern void __init pmsav7_setup(void); extern void __init pmsav8_setup(void); #else static inline void pmsav7_adjust_lowmem_bounds(void) {}; static inline void pmsav8_adjust_lowmem_bounds(void) {}; static inline void pmsav7_setup(void) {}; static inline void pmsav8_setup(void) {}; #endif #endif /* __ASSEMBLY__ */ #endif
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