/* * (C) Copyright 2013 * David Feng * * SPDX-License-Identifier: GPL-2.0+ */ #ifndef _ASM_ARMV8_MMU_H_ #define _ASM_ARMV8_MMU_H_ #ifdef __ASSEMBLY__ #define _AC(X, Y) X #else #define _AC(X, Y) (X##Y) #endif #define UL(x) _AC(x, UL) /***************************************************************/ /* * The following definitions are related each other, shoud be * calculated specifically. */ #define VA_BITS CONFIG_SYS_VA_BITS #define PTE_BLOCK_BITS CONFIG_SYS_PTL2_BITS /* * block/section address mask and size definitions. */ /* PAGE_SHIFT determines the page size */ #undef PAGE_SIZE #define PAGE_SHIFT 12 #define PAGE_SIZE (1 << PAGE_SHIFT) #define PAGE_MASK (~(PAGE_SIZE-1)) /***************************************************************/ /* * Memory types */ #define MT_DEVICE_NGNRNE 0 #define MT_DEVICE_NGNRE 1 #define MT_DEVICE_GRE 2 #define MT_NORMAL_NC 3 #define MT_NORMAL 4 #define MEMORY_ATTRIBUTES ((0x00 << (MT_DEVICE_NGNRNE * 8)) | \ (0x04 << (MT_DEVICE_NGNRE * 8)) | \ (0x0c << (MT_DEVICE_GRE * 8)) | \ (0x44 << (MT_NORMAL_NC * 8)) | \ (UL(0xff) << (MT_NORMAL * 8))) /* * Hardware page table definitions. * */ #define PTE_TYPE_MASK (3 << 0) #define PTE_TYPE_FAULT (0 << 0) #define PTE_TYPE_TABLE (3 << 0) #define PTE_TYPE_BLOCK (1 << 0) #define PTE_TABLE_PXN (1UL << 59) #define PTE_TABLE_XN (1UL << 60) #define PTE_TABLE_AP (1UL << 61) #define PTE_TABLE_NS (1UL << 63) /* * Block */ #define PTE_BLOCK_MEMTYPE(x) ((x) << 2) #define PTE_BLOCK_NS (1 << 5) #define PTE_BLOCK_NON_SHARE (0 << 8) #define PTE_BLOCK_OUTER_SHARE (2 << 8) #define PTE_BLOCK_INNER_SHARE (3 << 8) #define PTE_BLOCK_AF (1 << 10) #define PTE_BLOCK_NG (1 << 11) #define PTE_BLOCK_PXN (UL(1) << 53) #define PTE_BLOCK_UXN (UL(1) << 54) /* * AttrIndx[2:0] */ #define PMD_ATTRINDX(t) ((t) << 2) #define PMD_ATTRINDX_MASK (7 << 2) /* * TCR flags. */ #define TCR_T0SZ(x) ((64 - (x)) << 0) #define TCR_IRGN_NC (0 << 8) #define TCR_IRGN_WBWA (1 << 8) #define TCR_IRGN_WT (2 << 8) #define TCR_IRGN_WBNWA (3 << 8) #define TCR_IRGN_MASK (3 << 8) #define TCR_ORGN_NC (0 << 10) #define TCR_ORGN_WBWA (1 << 10) #define TCR_ORGN_WT (2 << 10) #define TCR_ORGN_WBNWA (3 << 10) #define TCR_ORGN_MASK (3 << 10) #define TCR_SHARED_NON (0 << 12) #define TCR_SHARED_OUTER (2 << 12) #define TCR_SHARED_INNER (3 << 12) #define TCR_TG0_4K (0 << 14) #define TCR_TG0_64K (1 << 14) #define TCR_TG0_16K (2 << 14) #define TCR_EPD1_DISABLE (1 << 23) #define TCR_EL1_RSVD (1 << 31) #define TCR_EL2_RSVD (1 << 31 | 1 << 23) #define TCR_EL3_RSVD (1 << 31 | 1 << 23) #ifndef __ASSEMBLY__ static inline void set_ttbr_tcr_mair(int el, u64 table, u64 tcr, u64 attr) { asm volatile("dsb sy"); if (el == 1) { asm volatile("msr ttbr0_el1, %0" : : "r" (table) : "memory"); asm volatile("msr tcr_el1, %0" : : "r" (tcr) : "memory"); asm volatile("msr mair_el1, %0" : : "r" (attr) : "memory"); } else if (el == 2) { asm volatile("msr ttbr0_el2, %0" : : "r" (table) : "memory"); asm volatile("msr tcr_el2, %0" : : "r" (tcr) : "memory"); asm volatile("msr mair_el2, %0" : : "r" (attr) : "memory"); } else if (el == 3) { asm volatile("msr ttbr0_el3, %0" : : "r" (table) : "memory"); asm volatile("msr tcr_el3, %0" : : "r" (tcr) : "memory"); asm volatile("msr mair_el3, %0" : : "r" (attr) : "memory"); } else { hang(); } asm volatile("isb"); } struct mm_region { u64 base; u64 size; u64 attrs; }; extern struct mm_region *mem_map; #endif #endif /* _ASM_ARMV8_MMU_H_ */