farga/arch/riscv, branch mainA bunch of code that messes with low level stuff.
https://git.mssola.com/os/farga/atom?h=main2026-07-22T15:00:52ZUpdate links to git.mssola.com2026-07-22T15:00:52ZMiquel Sabaté Solàmssola@mssola.com2026-07-22T15:00:52Zurn:sha1:68ff13d1b9c8ef164a056e2e340404480e778dd1
Signed-off-by: Miquel Sabaté Solà <mssola@mssola.com>
hwprobe: add detection for the Zabha extension2026-06-17T20:38:10ZMiquel Sabaté Solàmssola@mssola.com2026-06-17T20:38:10Zurn:sha1:f55cde81689a1a1a29666a3626b069a883be430d
Signed-off-by: Miquel Sabaté Solà <mssola@mssola.com>
riscv: user: Force LINUX_HEADERS on hwprobe2025-04-22T19:29:06ZMiquel Sabaté Solàmikisabate@gmail.com2025-04-22T19:29:06Zurn:sha1:1de9228fda28826c337ac09201586de1f2f248b9
Signed-off-by: Miquel Sabaté Solà <mikisabate@gmail.com>
riscv: user: Statically build everything2025-04-22T14:18:50ZMiquel Sabaté Solàmikisabate@gmail.com2025-04-22T14:18:50Zurn:sha1:74caba366d3fafd21910f3d95dbc2819267c52bc
This way these binaries can be executed from virtually anywhere, like my
minimalistic busybox setup I have for QEMU which doesn't even have the
`ld-` files required to run a C program.
Signed-off-by: Miquel Sabaté Solà <mikisabate@gmail.com>
riscv: user: Update constants for Zicntr and Zihpm2025-04-22T14:15:50ZMiquel Sabaté Solàmikisabate@gmail.com2025-04-22T14:15:50Zurn:sha1:b2f8b8c1918b4523ee45dfc3f13a609fa18c0696
A patch from me has finally been merged into the Linux Kernel, and the
values for these constants have been increased by one due to the
inclusion of another patch.
Moreover, the Zicsr and Zifencei extensions have not been exported yet,
but they might not make sense to include them after all.
Signed-off-by: Miquel Sabaté Solà <mikisabate@gmail.com>
supervisor: Add an example on the HSM extension2024-12-05T15:02:51ZMiquel Sabaté Solàmikisabate@gmail.com2024-12-05T14:34:33Zurn:sha1:76169cd214e4830a523c8c2ee7bbddc04b4253df
The HSM extension from SBI v2.0 allows a supervisor to manage the state
of harts on the system. Moreover, it also guarantees that only one hart
makes it into the booting stages of the supervisor, and it's up to the
supervisor to wake up the rest through the HSM extension.
I have added an example which showcases this extension in different
ways, and it finally shuts down the machine.
Signed-off-by: Miquel Sabaté Solà <mikisabate@gmail.com>
Remove old test code2024-12-05T15:02:51ZMiquel Sabaté Solàmikisabate@gmail.com2024-12-04T20:42:37Zurn:sha1:f463d544793ff83efd8b95d0bce5ec80fd8170f3
There is some code that I had there after messing with some of the
topics on Uros' blog (https://popovicu.com/), but that became irrelevant
after working on some other projects (e.g. fbos) or on other examples.
This commit also brings about a major overhaul on the structure of the
project. Hopefully it's now at a more ready state.
Signed-off-by: Miquel Sabaté Solà <mikisabate@gmail.com>
linux: Add a program to test the hwprobe syscall2024-12-05T15:02:50ZMiquel Sabaté Solàmikisabate@gmail.com2024-11-20T15:40:31Zurn:sha1:bab3fdfd61b3488e1879bc3e53ac17f41d2e8b67
RISC-V on Linux has a hwprobe system call which allows you to discover
what is supported by the running kernel.
Signed-off-by: Miquel Sabaté Solà <mikisabate@gmail.com>
usr: Add a strcmp example2024-12-05T15:02:50ZMiquel Sabaté Solàmikisabate@gmail.com2024-11-20T15:30:44Zurn:sha1:9a3324f50679177401eecdedcf80f25ddcdd9042
Signed-off-by: Miquel Sabaté Solà <mikisabate@gmail.com>
usr: Do not force a CROSS_COMPILE value2024-12-05T15:02:50ZMiquel Sabaté Solàmikisabate@gmail.com2024-11-20T15:29:59Zurn:sha1:d15d2ecae1faaaaed3251f64fa998b8d325c5c92
Signed-off-by: Miquel Sabaté Solà <mikisabate@gmail.com>