mirror of
https://github.com/openhwgroup/cvw
synced 2025-02-11 06:05:49 +00:00
153 lines
3.8 KiB
ArmAsm
153 lines
3.8 KiB
ArmAsm
///////////////////////////////////////////
|
|
// tlbMisaligned.S
|
|
//
|
|
// Written: Rose Thompson rose@rosethompson.net
|
|
//
|
|
// Purpose: Create a page table with misaligned load and store access. Checks TLB misses prevent misaligned load/store fault.
|
|
//
|
|
// A component of the CORE-V-WALLY configurable RISC-V project.
|
|
// https://github.com/openhwgroup/cvw
|
|
//
|
|
// Copyright (C) 2021-24 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"
|
|
|
|
# run-elf.bash find this in project description
|
|
main:
|
|
li t5, 0x1
|
|
slli t5, t5, 62
|
|
ori t5, t5, 0xF0
|
|
csrs menvcfg, t5 # menvcfg.PBMTE = 1, CBZE, CBCFE, CBIE all 1
|
|
|
|
# Page table root address at 0x80010000
|
|
li t5, 0x9000000000080010
|
|
csrw satp, t5
|
|
|
|
# sfence.vma x0, x0
|
|
|
|
# switch to supervisor mode
|
|
li a0, 1
|
|
ecall
|
|
li t5, 0
|
|
li t2, 0x1000
|
|
li t0, 0x1000 // go to first gigapage
|
|
li t4, 0x40000000 // put this outside the loop.
|
|
|
|
lw t1, 1(t0) # load a misaligned aligned cached address
|
|
li t1, 0x00008067 #load in jalr
|
|
add t0, t0, t2 # go to the next page
|
|
sw t1, 1(t0) # store to another misaligned cached address.
|
|
|
|
add t0, t0, t2 # go to the next page
|
|
lw t1, 1(t0) # load a misaligned aligned uncached address should fault
|
|
add t0, t0, t2 # go to the next page
|
|
sw t1, 1(t0) # store to another misaligned uncached address should falt.
|
|
|
|
fence.I
|
|
|
|
finished:
|
|
j done
|
|
|
|
.data
|
|
|
|
.align 16
|
|
# Page table situated at 0x80010000
|
|
pagetable:
|
|
.8byte 0x200044C1
|
|
|
|
.align 12
|
|
.8byte 0x00000000200048C1
|
|
.8byte 0x00000000200048C1
|
|
.8byte 0x00000000200048C1
|
|
|
|
|
|
.align 12
|
|
.8byte 0x0000000020004CC1
|
|
//.8byte 0x00000200800CF// ADD IN THE MEGAPAGE should 3 nibbles of zeros be removed?
|
|
|
|
.align 12
|
|
#80000000
|
|
.8byte 0x200000CF
|
|
.8byte 0x200004CF # first page
|
|
.8byte 0x200008CF # second page
|
|
.8byte 0x2000000020000CCF # 3rd page
|
|
|
|
.8byte 0x20000000200010CF # 4th page
|
|
.8byte 0x200014CF
|
|
.8byte 0x200018CF
|
|
.8byte 0x20001CCF
|
|
|
|
.8byte 0x200020CF
|
|
.8byte 0x200024CF
|
|
.8byte 0x200028CF
|
|
.8byte 0x20002CCF
|
|
|
|
.8byte 0x200030CF
|
|
.8byte 0x200034CF
|
|
.8byte 0x200038CF
|
|
.8byte 0x20003CCF
|
|
|
|
.8byte 0x200040CF
|
|
.8byte 0x200044CF
|
|
.8byte 0x200048CF
|
|
.8byte 0x20004CCF
|
|
|
|
.8byte 0x200050CF
|
|
.8byte 0x200054CF
|
|
.8byte 0x200058CF
|
|
.8byte 0x20005CCF
|
|
|
|
.8byte 0x200060CF
|
|
.8byte 0x200064CF
|
|
.8byte 0x200068CF
|
|
.8byte 0x20006CCF
|
|
|
|
.8byte 0x200070CF
|
|
.8byte 0x200074CF
|
|
.8byte 0x200078CF
|
|
.8byte 0x20007CCF
|
|
|
|
.8byte 0x200080CF
|
|
.8byte 0x200084CF
|
|
.8byte 0x200088CF
|
|
.8byte 0x20008CCF
|
|
|
|
.8byte 0x200090CF
|
|
.8byte 0x200094CF
|
|
.8byte 0x200098CF
|
|
.8byte 0x20009CCF
|
|
|
|
.8byte 0x2000A0CF
|
|
.8byte 0x2000A4CF
|
|
.8byte 0x2000A8CF
|
|
.8byte 0x2000ACCF
|
|
|
|
.8byte 0x2000B0CF
|
|
.8byte 0x2000B4CF
|
|
.8byte 0x2000B8CF
|
|
.8byte 0x2000BCCF
|
|
|
|
.8byte 0x2000C0CF
|
|
.8byte 0x2000C4CF
|
|
.8byte 0x2000C8CF
|
|
.8byte 0x2000CCCF
|
|
|
|
.8byte 0x2000D0CF
|
|
.8byte 0x2000D4CF
|