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RISC-V SV39 Page Table Mechanics In traditional operating system designs, transferring data between user space and kernel space requires software-based page table traversal (e.g., copyin and copyout). This software approach simulates the three-level page table walk, which is inherently slower than utilizing the hardware Memory Management Unit ( ...

Memory Layout and Page Table Management Hardware Device Mapping Hardware devices like UART0 (0x10000000L), VIRTIO0, CLINT, and PLIC have fixed physical addresses and interrupt numbers defined by hardware design. The kernel uses these addresses to communicate with devices, initialize registers, and handle interrupts. Kernel Loading and Execution ...