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* Stall the pipeline even for branch which requires memory read as argument.Pavel Pisa2019-02-18
| | | | | | | | | | This type of the hazard doe not cause problems in the simulator because processing of memory stage is already finished at time when PC handling is started but it would cause problems in real hardware where PC handling is processed in parallel to memory load. Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
* Update homepage to point to CVUT GitHub repository.Pavel Pisa2019-02-18
| | | | Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
* Do not update instruction in the decode stage when stalled.Pavel Pisa2019-02-17
| | | | | | | Decode dt_d represents next input to execute stage not state of decode stage at this moment. Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
* docs: more clarification how to use compillersPavel Pisa2019-02-17
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* docs: startup code for both PIC and non-PIC environments.Pavel Pisa2019-02-17
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* Ignore LWC1, LWD1, SWC1 and SDC1 instructions.Pavel Pisa2019-02-17
| | | | | | This allows to use MUSL Lib C printf and scanf implementations. Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
* Pass arithmetic exception trough pipeline and implement trap support and ↵Pavel Pisa2019-02-17
| | | | | | instructions. Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
* Change RGB LEDs signals and slots to unsigned value.Pavel Pisa2019-02-16
| | | | | | | Signed value caused in the conversion incorrect behavior for some corner cases. Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
* Correct final loop label in documentation.Pavel Pisa2019-02-16
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* Enable copy from memory and program views.Pavel Pisa2019-02-15
| | | | Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
* System calls stubs for brk and mmap2.Pavel Pisa2019-02-15
| | | | Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
* Multiply and accumulate and CLZ/CLO operations added.Pavel Pisa2019-02-15
| | | | Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
* Implement EXT instruction used in GLIBC startup.Pavel Pisa2019-02-15
| | | | | | It requires one more field to pass to ALU. Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
* Core: move complex memory operation to own function and implement LWL, LWR, ↵Pavel Pisa2019-02-15
| | | | | | | | SWL, SWR. The move makes basic memory stage processing more readable. Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
* Fill the rest of ALU opcode table to file all 64 entries.Pavel Pisa2019-02-14
| | | | Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
* The conversion of address has to use toULong to allow access to the second ↵Pavel Pisa2019-02-14
| | | | | | part of address-space on 32-bit systems. Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
* Correct program loader to open ELF file in binary mode on Windows.Pavel Pisa2019-02-14
| | | | Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
* Clarify KNOBS_8BIT register.Pavel Pisa2019-02-14
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* README: correct code snippets formatting.Pavel Pisa2019-02-14
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* Position hit and miss counters to left to fit in the diagram box a little ↵Pavel Pisa2019-02-14
| | | | | | longer. Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
* Correct typo.Pavel Pisa2019-02-14
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* Ignore PREF instruction.Pavel Pisa2019-02-14
| | | | Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
* Correct code snippets formatting.Pavel Pisa2019-02-14
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* Make dosc word in README to be link to documentation directory.Pavel Pisa2019-02-14
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* Document which executable formats QtMips accepts.Pavel Pisa2019-02-14
| | | | Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
* Typo corrected.Pavel Pisa2019-02-14
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* Add link to thesis and subject pages in README.Pavel Pisa2019-02-14
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* README.md updatedPavel Pisa2019-02-14
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* Implemented graphic representation and update of line and RGB LEDs.Pavel Pisa2019-02-14
| | | | Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
* Implement write syscall and signal written characters to terminal.Pavel Pisa2019-02-14
| | | | Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
* Implemented sys_set_thread_area and sys_writev syscalls.Pavel Pisa2019-02-14
| | | | | | | The example Linux program compiled against musl library reaches main and displays printf output. Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
* Implement function to setup core C0 userlocal register.Pavel Pisa2019-02-14
| | | | Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
* Implement MUL operation which stores result to the register.Pavel Pisa2019-02-14
| | | | Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
* Ensure that single step does not run chunk of instructions instead of one.Pavel Pisa2019-02-13
| | | | Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
* Initial attempt to as operating system syscall handler.Pavel Pisa2019-02-13
| | | | Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
* Use trick to force knobs to resend signals when machine is newly connected.Pavel Pisa2019-02-13
| | | | | | The value is forced to change one step down and then up. Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
* Implemented three dials equivalent to MZ_APO RGB dials.Pavel Pisa2019-02-13
| | | | | | | Tested with code compiled by Linux PIC based GCC compiler with calling musl-libc sprintf function. Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
* Initialize SP to safe RAM area.Pavel Pisa2019-02-13
| | | | | | | | | | Address under 0xc0000000 corresponds to typical Linux stack on 32-bit systems. If SP is initialized to 0x00000000 then it can overwrite programs tarting at RAM begin and overflow to top of physical address-space which is reserved for uncached peripherals. Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
* Include simple serial port terminal and prepare empty peripheral dock.Pavel Pisa2019-02-13
| | | | Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
* Add simple about dialog and prepare menu entries for serial port and ↵Pavel Pisa2019-02-13
| | | | | | peripherals. Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
* Add speed option to run core for time chunks without visualization.Pavel Pisa2019-02-13
| | | | Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
* At least partial solution to depict forward paths to compare units/branches.Pavel Pisa2019-02-12
| | | | Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
* Add signals and multiplexers for ALU inputs forwarding.Pavel Pisa2019-02-12
| | | | Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
* Add ELF library even to the final executables linking to allow build with ↵Pavel Pisa2019-02-12
| | | | | | static machine lib. Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
* Make memory and program listing editable.Pavel Pisa2019-02-12
| | | | | | Instruction parsing is rough and does not support branch offset computation. Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
* Implement LRU as simple priority queue with linear insert sort.Pavel Pisa2019-02-12
| | | | Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
* Add debug access to rword and friends to allow read data through cache ↵Pavel Pisa2019-02-12
| | | | | | | | without disturbing statistic. This allows to switch view between CPU and raw memory content. Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
* Display red background for instruction causing exception and skip HW ↵Pavel Pisa2019-02-11
| | | | | | | | | | breakpoint for first cycle after resume. Instruction for stage is updated when given stage is flushed as well. But other signals are left intact, it is duty of memory stage to discard effect of instruction causing interrupt. Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
* Basic "hardware" breakpoints support implemented.Pavel Pisa2019-02-11
| | | | | | | | | | It works like real inserted breakpoint on hardware. Breakpoint has to be removed to allow code continue because else instruction is refetch and breakpoint triggers again. The single step function should resolve temporal masking of the breakpoint. Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
* Extend program view to support selected stage followup.Pavel Pisa2019-02-11
| | | | Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
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