| Commit message (Collapse) | Author | Age |
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Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
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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>
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Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
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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>
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This allows to use MUSL Lib C printf and scanf implementations.
Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
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instructions.
Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
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Signed value caused in the conversion incorrect behavior
for some corner cases.
Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
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Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
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Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
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Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
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It requires one more field to pass to ALU.
Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
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SWL, SWR.
The move makes basic memory stage processing more readable.
Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
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Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
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part of address-space on 32-bit systems.
Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
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Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
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longer.
Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
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Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
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Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
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Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
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Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
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The example Linux program compiled against musl library
reaches main and displays printf output.
Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
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Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
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Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
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Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
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Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
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The value is forced to change one step down and then up.
Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
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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>
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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>
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Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
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peripherals.
Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
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Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
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Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
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Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
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static machine lib.
Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
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Instruction parsing is rough and does not support branch offset computation.
Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
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Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
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without disturbing statistic.
This allows to switch view between CPU and raw memory content.
Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
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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>
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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>
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