| commit | fc5fb2da41cbb6e32814c0e438bb2d76465dbee6 | [log] [tgz] |
|---|---|---|
| author | Michael Munday <mike.munday@lowrisc.org> | Tue Jun 08 12:59:01 2021 +0100 |
| committer | Michael Munday <mike.munday@lowrisc.org> | Wed Jun 30 15:38:45 2021 +0100 |
| tree | 50942264dea80c7b59b9928347a159db4a65e194 | |
| parent | b4d815468b338ea6daa03374331edd228b8a3e31 [diff] |
[mask_rom] Add mask ROM ePMP functional test Adds a test ROM that shares the same ePMP configuration as the mask ROM. It takes about 30-60s to execute in verilator on my laptop. The test attempts to execute code in RAM, eFlash and the read-only part of the ROM to check that instruction access faults are generated correctly. It also tests that the region unlocked by a call to `mask_rom_epmp_unlock_rom_ext_rx` is correct. Blocking unwanted execution is the primary purpose of the ePMP module. For now the test does not check other types of access are allowed or blocked. It may be desirable to add other tests for these accesses (e.g. a stack overflow test for the stack guard) later. The test is unusual in that it executes from ROM and does not communicate any status information until the test is over (because the address space used by DV is blocked by the ePMP configuration that is being tested). Disabling the ePMP setup code results in the following output: ``` I00000 mask_rom_epmp_test.c:358] Starting MaskROM ePMP functional test. E00001 mask_rom_epmp_test.c:363] CHECK-fail: epmp_state_check(&epmp) == kErrorOk E00002 mask_rom_epmp_test.c:251] CHECK-fail: execute(illegal_ins_ro, kExceptionInstructionAccessFault) E00003 mask_rom_epmp_test.c:263] CHECK-fail: execute(illegal_ins_rw, kExceptionInstructionAccessFault) E00004 mask_rom_epmp_test.c:275] CHECK-fail: execute(&eflash[0], kExceptionInstructionAccessFault) E00005 mask_rom_epmp_test.c:276] CHECK-fail: execute(&eflash[eflash_len - 1], kExceptionInstructionAccessFault) E00006 mask_rom_epmp_test.c:283] eflash execution not blocked @ 0x20000418 E00007 mask_rom_epmp_test.c:331] CHECK-fail: epmp_state_check(epmp) == kErrorOk E00008 mask_rom_epmp_test.c:342] CHECK-fail: execute(&image[-1], kExceptionInstructionAccessFault) E00009 mask_rom_epmp_test.c:343] CHECK-fail: execute(&image[image_len], kExceptionInstructionAccessFault) E00010 mask_rom_epmp_test.c:378] CHECK-fail: epmp_unlock_test_status(&epmp) I00011 test_status.c:34] FAIL! ``` Signed-off-by: Michael Munday <mike.munday@lowrisc.org>
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