1 /* 2 * RISC-V cpu parameters for qemu. 3 * 4 * Copyright (c) 2017-2018 SiFive, Inc. 5 * SPDX-License-Identifier: GPL-2.0+ 6 */ 7 8 #ifndef RISCV_CPU_PARAM_H 9 #define RISCV_CPU_PARAM_H 10 11 #if defined(TARGET_RISCV64) 12 # define TARGET_LONG_BITS 64 13 # define TARGET_PHYS_ADDR_SPACE_BITS 56 /* 44-bit PPN */ 14 # define TARGET_VIRT_ADDR_SPACE_BITS 48 /* sv48 */ 15 #elif defined(TARGET_RISCV32) 16 # define TARGET_LONG_BITS 32 17 # define TARGET_PHYS_ADDR_SPACE_BITS 34 /* 22-bit PPN */ 18 # define TARGET_VIRT_ADDR_SPACE_BITS 32 /* sv32 */ 19 #endif 20 #define TARGET_PAGE_BITS 12 /* 4 KiB Pages */ 21 /* 22 * The current MMU Modes are: 23 * - U mode 0b000 24 * - S mode 0b001 25 * - M mode 0b011 26 * - U mode HLV/HLVX/HSV 0b100 27 * - S mode HLV/HLVX/HSV 0b101 28 * - M mode HLV/HLVX/HSV 0b111 29 */ 30 31 #endif 32