forked from Github_Repos/cvw
112 lines
6.2 KiB
ArmAsm
112 lines
6.2 KiB
ArmAsm
///////////////////////////////////////////
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//
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// WALLY-PMP
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//
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// Author: Kip Macsai-Goren <kmacsaigoren@g.hmc.edu>
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//
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// Created 2021-06-15
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//
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// Copyright (C) 2021 Harvey Mudd College & Oklahoma State University
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation
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// files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy,
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// modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software
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// is furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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// BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT
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// OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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///////////////////////////////////////////
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#include "WALLY-TEST-LIB-32.S"
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// Test library includes and handler for each type of test, a trap handler, imperas compliance instructions
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// Ideally this should mean that a test can be written by simply adding .8byte statements as below.
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# ---------------------------------------------------------------------------------------------
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# Test Contents
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#
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# Here is where the actual tests are held, or rather, what the actual tests do.
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# each entry consists of 3 values that will be read in as follows:
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#
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# '.8byte [x28 Value], [x29 Value], [x30 value]'
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# or
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# '.8byte [address], [value], [test type]'
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#
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# The encoding for x30 test type values can be found in the test handler in the framework file
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#
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# ---------------------------------------------------------------------------------------------
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# These tests follow the testing plan in Chapter 12 of the riscv-wally textbook *** what is it called and how do I refer to it?
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# =========== test 12.3.2.2 PMPs ===========
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# Test 12.3.2.2.1 Config: Write known values and set PMP config according to table 12.4 in the *** riscv book, copied below
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.8byte 0x0, 0x0018900C0009001F, 0xD # write pmpcfg0, output 0x0018900C0009001F
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.8byte 0x2, 0x1F00000000000000, 0xD # write pmpcfg2, output 0x1F00000000000000
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# write pmpaddr regs
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# | Reg | pmpaddr | pmpcfg | L | A | X | W | R | Comments |
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.8byte 0x0, 0x0FFFFFFF, 0xE # | 0 | 0FFFFFFF | 1F | 0 | NAPOT | 0 | 1 | 1 | I/O 00000000-7FFFFFFF RW |
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.8byte 0x1, 0x80100000, 0xE # | 1 | 80100000 | 00 | 0 | OFF | 0 | 0 | 0 | |
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.8byte 0x2, 0x801000FF, 0xE # | 2 | 801000FF | 09 | 0 | TOR | 0 | 0 | 1 | 80100000-801000FF R |
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.8byte 0x3, 0x80100200, 0xE # | 3 | 80100200 | 00 | 0 | OFF | 0 | 0 | 0 | |
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.8byte 0x4, 0x80100210, 0xE # | 4 | 80100210 | 0C | 0 | TOR | 1 | 0 | 0 | 80100200-80100210 X |
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.8byte 0x5, 0x80100300, 0xE # | 5 | 80100300 | 90 | 1 | NA4 | 0 | 0 | 0 | 80100300-80100303 locked out |
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.8byte 0x6, 0x2004013F, 0xE # | 6 | 2004013F | 18 | 0 | NAPOT | 0 | 0 | 0 | 80100400-801004FF no access |
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# Pmpaddr 7-14 are all zeroed out in this test, so they don't need writes.
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.8byte 0xF, 0x8FFFFFFF, 0xE # | 15 | 8FFFFFFF | 1F | 0 | NAPOT | 1 | 1 | 1 | Main mem 80000000-FFFFFFFF RWX |
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# write known values to memory where W=0. This should be possible since we're in machine mode.
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.8byte 0x80100010, 0x600DAA, 0x0 # write to pmpaddr 1-2 range
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.8byte 0x80100400, 0x600DBB, 0x0 # write to pmpaddr 6 range
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# Write RET to regions where X = 0, 1 in main memory
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# *** This is currently impossible due to the fact that writing ret gets put into the datacache but
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# The values in datacache never get synced with icache values so when we try to fetch the written ret,
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# We get an instr of all 0x0
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# It may also be impossible to do the exe tests version from the library since we have no way to guarantee that theyll be
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# compiled into in the address range with the right permissions.
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# attempt to write to pmpcfg5 after lockout
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.8byte 0x0, 0x0018EE0C0009001F, 0xD # instruction ignored, output 0x0018900C0009001F, NOT 0x0018EE0C0009001F
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# Test 12.3.2.2.2 Machine mode access
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.8byte 0x80100300, 0x0, 0x1 # access fault to region with L=1, R=0
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.8byte 0x80100400, 0x0, 0x1 # successful access to region with L=X=W=R=0
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# Test 12.3.2.2.3 System mode access
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.8byte 0x0, 0x0, 0x9 # go to S mode. 0xb written to output
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# test a write followed by a read to each region with R=W=1
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.8byte 0x80200000, 0x600D15, 0x0 # Write "good value" to RW range (PMP15)
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.8byte 0x80200000, 0x600D15, 0x1 # confirm write with read
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# test a write followed by a read on the edges of a read-only range
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.8byte 0x800FFFF8, 0x600D02, 0x0 # Write "good value" just below read-only range (PMP2)
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.8byte 0x800FFFF8, 0x600D02, 0x1 # confirm write with read
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.8byte 0x80100100, 0x600D12, 0x0 # Write "good value" just above read-only range (PMP2)
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.8byte 0x80100100, 0x600D12, 0x1 # confirm write with read
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# test a read from each read only range verify a write causes an access fault
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.8byte 0x80100010, 0xBAD, 0x0 # Write fault in read-only range (PMP2)
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.8byte 0x80100010, 0x600DAA, 0x1 # read correct value out
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# test read and write fault on region with no access
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.8byte 0x80100208, 0x600D15, 0x0 # Write fault on no-access range (PMP6)
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.8byte 0x80100208, 0x600D15, 0x1 # read fault on no-access range (PMP6)
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# test jalr to region with X=0 causes access fault
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.8byte 0x80100400, 0xF, 0x2 # instr fault on no-execute range (PMP6)
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# test jalr to region with X=1 returns successfully
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# *** This has the same problem as the note above where we want actual instructions to be in this range,
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# but it's difficult to make sure the exe_code in the library will compile into the right pmp range for this to work
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.8byte 0x0, 0x0, 0x3 // terminate tests
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