Mark
69 lines
1.8 KiB
Markdown
69 lines
1.8 KiB
Markdown
Yggdrasil x86-64 kernel
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======================================
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(I still need refactoring, huh.)
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Yggdrasil is the name for my kernel development project which
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tries to follow the Unix principles (sheesh, yet another POSIX
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OS?) and is loosely inspired by stuff like Linux,
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BSD and other *nixes I've laid my hands on so far.
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Building
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--------
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```Shell session
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cp defconfig config
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export ARCH=amd64
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make
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```
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The results are build/sys/amd64/loader.elf (32-bit loader and for 64-bit kernel)
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and build/sys/amd64/kernel.elf (the kernel itself)
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What works
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----------
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* Multithreading (kernel/user)
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* kill()/signal()
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* VFS implementation with non-resident ("mapper") filesystem support
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* ext2 driver supporting both read/write, directories and symlinks
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* VT100 basic control sequences for color/cursor control in tty.
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* ELF binary loading
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* fork()/exec()
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* ARP name resolution
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What works: amd64-specific
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--------------------------
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* SMP (though I haven't tested it well):
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- APs are started up using InitIPI/SIPIs
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- LAPIC config
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- LAPIC timer for each processor
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- Per-CPU scheduling queues
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* I/O APIC configuration:
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- 8259 PIC -> I/O APIC mapping
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- Trigger/polarity config from MADT table (for 8259 IRQs)
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* PCI:
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- Device enumeration
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- PCI-to-PCI bridge support
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- Resolve INTA#/INTB#/INTC#/INTD# pin routing
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* ACPI:
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- Integrated ACPICA into the kernel. Singlethreaded-only so far.
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- PCI Interrupt Link Devices (\_SB_.LNKx/GSIx) for dynamic PCI IRQ mapping
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- Hard IRQ routes (for chipsets where there's no IRQ router and PCI traces are hardwired)
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- Shutdown works (Sleep state 5)
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What works: devices
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-------------------
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* RTL8139 Network Controller - both Tx/Rx
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* AHCI SATA controllers (R/O)
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* IDE controllers (R/O)
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Credits
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-------
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* Linux for default8x16 font
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