/* * Copyright (c) 2006-2021, RT-Thread Development Team * * SPDX-License-Identifier: Apache-2.0 * * Change Logs: * Date Author Notes * 2021-01-30 lizhirui first version */ #ifndef __RISCV_MMU_H__ #define __RISCV_MMU_H__ #include #include #include "riscv.h" #undef PAGE_SIZE #define PAGE_OFFSET_SHIFT 0 #define PAGE_OFFSET_BIT 12 #define PAGE_SIZE __SIZE(PAGE_OFFSET_BIT) #define PAGE_OFFSET_MASK __MASK(PAGE_OFFSET_BIT) #define VPN0_SHIFT (PAGE_OFFSET_SHIFT + PAGE_OFFSET_BIT) #define VPN0_BIT 9 #define VPN1_SHIFT (VPN0_SHIFT + VPN0_BIT) #define VPN1_BIT 9 #define VPN2_SHIFT (VPN1_SHIFT + VPN1_BIT) #define VPN2_BIT 9 #define PPN0_SHIFT (PAGE_OFFSET_SHIFT + PAGE_OFFSET_BIT) #define PPN0_BIT 9 #define PPN1_SHIFT (PPN0_SHIFT + PPN0_BIT) #define PPN1_BIT 9 #define PPN2_SHIFT (PPN1_SHIFT + PPN1_BIT) #define PPN2_BIT 26 #define L1_PAGE_SIZE __SIZE(PAGE_OFFSET_BIT + VPN0_BIT + VPN1_BIT) #define L2_PAGE_SIZE __SIZE(PAGE_OFFSET_BIT + VPN0_BIT) #define L3_PAGE_SIZE __SIZE(PAGE_OFFSET_BIT) #define ARCH_ADDRESS_WIDTH_BITS 64 #define PHYSICAL_ADDRESS_WIDTH_BITS 56 #define PAGE_ATTR_NEXT_LEVEL (0) #define PAGE_ATTR_RWX (PTE_X | PTE_W | PTE_R) #define PAGE_ATTR_READONLY (PTE_R) #define PAGE_ATTR_READEXECUTE (PTE_X | PTE_R) #define PAGE_ATTR_USER (PTE_U) #define PAGE_ATTR_SYSTEM (0) #define PAGE_DEFAULT_ATTR_LEAF (PAGE_ATTR_RWX | PAGE_ATTR_USER | PTE_V | PTE_G) #define PAGE_DEFAULT_ATTR_NEXT (PAGE_ATTR_NEXT_LEVEL | PTE_V | PTE_G) #define PAGE_IS_LEAF(pte) __MASKVALUE(pte, PAGE_ATTR_RWX) #define PTE_USED(pte) __MASKVALUE(pte, PTE_V) /** * encoding of SATP (Supervisor Address Translation and Protection register) */ #define SATP_MODE_OFFSET 60 #define SATP_MODE_BARE 0 #define SATP_MODE_SV39 8 #define SATP_MODE_SV48 9 #define SATP_MODE_SV57 10 #define SATP_MODE_SV64 11 #define ARCH_VA_WIDTH 39 #define SATP_MODE SATP_MODE_SV39 #define mmu_flush_tlb() \ do \ { \ asm volatile("sfence.vma x0,x0"); \ } while (0) #define MMU_MAP_K_DEVICE (PTE_G | PTE_W | PTE_R | PTE_V) #define MMU_MAP_K_RWCB (PTE_G | PTE_X | PTE_W | PTE_R | PTE_V) #define MMU_MAP_U_RWCB (PTE_U | PTE_X | PTE_W | PTE_R | PTE_V) #define MMU_MAP_U_RWCB_XN (PTE_U | PTE_W | PTE_R | PTE_V) #define MMU_MAP_U_RW (PTE_U | PTE_X | PTE_W | PTE_R | PTE_V) #define PTE_XWR_MASK 0xe #define ARCH_PAGE_SIZE PAGE_SIZE #define ARCH_PAGE_MASK (ARCH_PAGE_SIZE - 1) #define ARCH_PAGE_SHIFT PAGE_OFFSET_BIT #define ARCH_INDEX_WIDTH 9 #define ARCH_INDEX_SIZE (1ul << ARCH_INDEX_WIDTH) #define ARCH_INDEX_MASK (ARCH_INDEX_SIZE - 1) void mmu_set_pagetable(rt_ubase_t addr); void mmu_enable_user_page_access(); void mmu_disable_user_page_access(); #endif