########################################## # ieu.S # # Written: David_Harris@hmc.edu 21 March 2023 # # Purpose: Test coverage for IEU # # A component of the CORE-V-WALLY configurable RISC-V project. # https://github.com/openhwgroup/cvw # # Copyright (C) 2021-23 Harvey Mudd College & Oklahoma State University # # SPDX-License-Identifier: Apache-2.0 WITH SHL-2.1 # # Licensed under the Solderpad Hardware License v 2.1 (the “License”); you may not use this file # except in compliance with the License, or, at your option, the Apache License version 2.0. You # may obtain a copy of the License at # # https://solderpad.org/licenses/SHL-2.1/ # # Unless required by applicable law or agreed to in writing, any work distributed under the # License is distributed on an “AS IS” BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, # either express or implied. See the License for the specific language governing permissions # and limitations under the License. ############################################################################################## # load code to initalize stack, handle interrupts, terminate #include "WALLY-init-lib.h" main: # Division test (having trouble with buildroot) li x11, 0x384000 li x12, 0x1c2000 divuw x9, x11, x12 # Test clz with all bits being 0 li t0, 0 clz t1, t0 li t0, -1 clz t1, t0 li t0, 1 clz t1, t0 # Test forwarding from store conditional mv a0, sp lr.w t0, 0(a0) sc.w t0, a1, 0(a0) addi t0, t0, 1 # test prefetch Hints (ori with destination x0) ori x0, x0, 0 ori x0, x0, 1 ori x0, x0, 2 ori x0, x0, 3 # Test illegal instructions are detected .word 0x80000033 # illegal R-type instruction .word 0x00007003 # illegal Load instruction .word 0x80005013 # illegal I-type instruction: srli: op = 0010011, funct3 = 101, funct7 = 1000000 .word 0x00000000 # illegal instruction .word 0x0000701B # Illegal IW instruction .word 0x00004023 # Illegal store instruction .word 0x0400003B # Illegal RW or MulDivW instruction .word 0x00007067 # Illegal JALR instruction .word 0x00002063 # Illegal branch instruction .word 0x60F01013 # Illegal BMU sign extend / count instruction .word 0x60801013 # Illegal BMU sign extend / count instruction .word 0x60301013 # Illegal BMU sign extend / count instruction .word 0x6BF05013 # Illegal BMU similar to rev8 .word 0x69805013 # Illegal BMU similar to rev8 .word 0x28F05013 # Illegal BMU similar to or.c .word 0x60F0101B # Illegal BMU similar to count word .word 0x6080101B # Illegal BMU similar to count word .word 0x6030101B # Illegal BMU similar to count word .word 0x0000202F # Illegal similar to LR .word 0x1010202F # Illegal similar to LR .word 0x00402003 # illegal similar to CMO .word 0x00202003 # illegal similar to CMO .word 0xFF00302F # illegal Atomic instruction .word 0xFF00402F # illegal Atomic instruction .word 0x00000873 # illegal CSR instruction # Illegal CMO instructions because envcfg is 0 and system is in user Mode li a0, 0 ecall # switch to user mode cbo.inval (x1) cbo.clean (x1) cbo.flush (x1) cbo.zero (x1) li a0, 3 ecall # switch back to machine mode li x1, 0x50 csrw menvcfg, x1 csrw senvcfg, x1 li a0, 0 ecall # swtich to user mode cbo.inval (x2) cbo.clean (x3) cbo.flush (x1) j done