Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>

The build supports native run as well as static builds for multiple
architectures supported by GNU/Linux system which can be run
on corresponding target system and or by user-space QEMU
emulation under GNU/Linux.

riscv and mips targest use special local minimal low level
system mapping library for NewLib libc which allows to run
these minimal binaries not only on apropriate GNU/Linux
systems but even under QtRvSim and QtMips emulators

  https://comparch.edu.cvut.cz/



Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>

This allows to compile and run on Linux kernel even binaries
even binaries linked even with C library build for embedded
targets (bare metal riscv32-unknown-elf or riscv64-unknown-elf
NewLib is usable then).

Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>

Functional in with user QEMU for 32 or even 64-bit build
on GNU{Linux system. printf() works on qtrvsim_gui but
actual malloc/sbrk code does not. qtrvsim_cli missing
system-calls support at all.

Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>

Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>

seminaries/qtrvsim/uart-calc-add: task to receive two decimal numbers from UART and send sum in decimal to the UART.

Implement receive, add and print functions and place C language source
file on path

  work/uart-calc-add/uart-calc-add.c

To run the code in qtrvsim_cli, the serial port to file redirection
can be used, see the Makefile.

Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>

Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>

seminaries/qtrvsim/fibo-hazards: remove warning notice, set no hazard unit is already possible in CLI.

Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>

Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>

Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>

lw-hazards.S: fix register notation in lw

See merge request b35apo/stud-support!2

Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>

Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>

The forth B35APO tutorial focused on the cache operation

  https://cw.fel.cvut.cz/wiki/courses/b35apo/en/tutorials/04/start



Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>

Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>

The directory contain seminaries/qtrvsim/buble-sort/bubble-sort-template.S
file. The whole directory or only only this file should appear in the
directory work/bubble-sort/bubble-sort.S and changes should be sent
to your repository. We are working on automation process for the testing.
Expect more instructions.

Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>

Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>

The libgcc provides helper functions as __mulsi3 which are necessary
for limited rv32i instruction set to allow complete C operators
and floats use.

Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>

Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>

Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>

Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>

Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>

Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>

The actual riscv64-unknown-elf toolchain setup on the k13135 diskless
does provide stdint.h header file so the uint32_t is hardcodded.

Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>

The Computer Architectures course pages

  https://cw.fel.cvut.cz/wiki/courses/b35apo/start

RISC-V CPU simulator for education purposes

  https://github.com/cvut/qtrvsim



Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>

Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>

Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>

seminaries/mzapo/lcd/mzapo_lcdip: fix initial IP address value to indicate when no address is offered.

Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>

Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>

Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>

Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>

Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>

Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>

Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>

seminaries/qtmips/qtmips/uart-calc-add: task to receive two decimal numbers from UART and send sum in decimal to the UART.

Implement receive, add and print functions and place C language source
file on path

  work/uart-calc-add/uart-calc-add.c

To run the code in qtmips_cli, the serial port to file redirection
is required. Commit

      qtmips_cli: add option to connect serial port input and output to file.
      https://github.com/cvut/QtMips/commit/597c9271608c3d30ce193b96be3fe82966e4cc1d



qtmips_gui implement required functionality for lonag time already.

Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>

The serial port support for qtmips_cli is required. Commit

  qtmips_cli: add option to connect serial port input and output to file.
  https://github.com/cvut/QtMips/commit/597c9271608c3d30ce193b96be3fe82966e4cc1d



Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>

seminaries/qtmips/print-hex-to-uart: task to convert binary value to hexadecimal digits sent to UART.

Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>

Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>

The CPu configuration without hazard unit is provided for qtmips_gui
form initial release, but support has been implemented
to qtmips_cli only recently, see the commit 2020-04-06 10:38 PM

    qtmips_cli: add option to specify used hazard unit -
                none, stall, forward.

Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>