kmi/arch/riscv64/init/init.c, branch master ACTIVE - Kernel with migrating threads as IPC https://metanimi.dy.fi/cgit/kmi/atom?h=master 2024-07-05T16:38:11Z allow booting with Qemu's -kernel flag directly 2024-07-05T16:38:11Z Kimplul kimi.h.kuparinen@gmail.com 2024-07-05T16:38:11Z urn:sha1:e09edb5d54e39bd9509a1dc450df5ab320759f97 + Took some fairly significant changes, for one the kernel is no longer relocated at the start of a boot, instead it sits wherever the user decides the kernel should sit. Similarly, the initial kernel stack and page table are stored within the binary, slightly bloating the size but making it much safer to boot since there's really no chance of us overwriting the fdt or initrd in memory. add initial smp bringup 2023-08-04T17:50:41Z Kimplul kimi.h.kuparinen@gmail.com 2023-08-04T17:50:41Z urn:sha1:e16f5f81dfb2e97a554ec19b941ec05a7942fd2d visionfive2 boots until debugging is initialized 2023-06-03T21:48:15Z Kimplul kimi.h.kuparinen@gmail.com 2023-06-03T21:48:15Z urn:sha1:52e5c94314fa8e10efded82db85d181ed32f00bd start trying to boot on visionfive 2 2023-05-29T18:31:09Z Kimplul kimi.h.kuparinen@gmail.com 2023-05-29T18:31:09Z urn:sha1:3ace1ddd76b9c04f3ed23883de6279b4485612e8 + Not bootable quite yet. Among other things, I couldn't get the current starfive u-boot fork to boot, so try adding support for booting with precompiled u-boot via the `go` command. Initial testing with qemu shows that this should be possible, and if it works, might be useful in the (far) future with other slightly janky SBCs. Also, NS16550 is 8250-based, and I'm really only using the base 8250, so rename and add visionfive 2 uart to list of compatibles. Visionfive 2 is still completely untested. arbitrary load address and RAM base detection 2023-05-11T19:55:31Z Kimplul kimi.h.kuparinen@gmail.com 2023-05-11T19:55:31Z urn:sha1:27ffa747f36aee9c1d5bbc61395a078238366070 + Both kind of go hand in hand, made sense to do both at the same time. Some parts feel slightly hacky, the loader works by placing everything on the stack and avoiding global values. Still, seems to work? update license stuff 2023-05-01T19:02:49Z Kimplul kimi.h.kuparinen@gmail.com 2023-05-01T19:02:49Z urn:sha1:05d4244f68e35c1bef6488292bf9730df3636fd9 rename to kmi 2023-04-30T14:06:02Z Kimplul kimi.h.kuparinen@gmail.com 2023-04-30T14:06:02Z urn:sha1:ea5ebe0809fb31b9f125ac0689f706cc5f3f078f change syscalls to take 5 params and return 6 2022-09-15T16:46:07Z Kimplul kimi.h.kuparinen@gmail.com 2022-09-15T16:21:14Z urn:sha1:a717296a2036cede5fccfff544513043a984d614 + In total, a syscall is built up of 6 values, with the first being the syscall number. Symmetrically, the first value is now a status and the following five values return "values". This allows us to cram in more info into the ipc_* functions. The performance difference is absolutely minimal, at least from my testing in qemu. riscv32 boots and advances as far as riscv64 2022-09-14T18:21:27Z Kimplul kimi.h.kuparinen@gmail.com 2022-09-11T18:50:55Z urn:sha1:025778e89e7d0fe3cd1ad53537c9cc6f3cd819cc allow building with riscv64-linux-gnu 2022-09-10T22:09:02Z Kimplul kimi.h.kuparinen@gmail.com 2022-09-10T22:07:52Z urn:sha1:7101970b3cdb2a0190e69a98352275907ab935a4 + May warn about PHDR not being in LOAD, there is a flag to silence it (--no-warn-rwx-segment) but it doesn't seem to exist in riscv64-unknown-elf for some reason.