f87a4e3101
Add a driver for NE2000-compatible ISA Ethernet cards based on the DP8390 controller. Features: - PROM-based MAC address detection and validation - Programmed I/O (PIO) remote DMA for data transfers - Ring buffer management for RX with wrap-around handling - IRQ 9-driven packet reception and transmission - Synchronous TX with timeout - Character device registration as 'eth' class (/dev/ethN) Probe verifies card presence by resetting the controller, configuring it for PROM reading, and checking the MAC is not all-0xFF/all-0x00 (which would indicate no hardware at the I/O base). NE2000 memory layout (16 KiB on-card RAM): - Pages 0x40-0x45: TX buffer (1536 bytes, 1 MTU frame) - Pages 0x46-0x7F: RX ring buffer (~14.5 KiB) Tested with QEMU: `-device ne2k_isa,iobase=0x300,irq=9` correctly detects the card and registers /dev/eth1. Without the NIC option, probe correctly reports 'not found'.
42 lines
655 B
CMake
42 lines
655 B
CMake
cmake_minimum_required(VERSION 3.16)
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add_executable(kernel
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boot.S
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gdt_flush.S
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gdt.c
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idt.c
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isr.c
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pic.c
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pmm.c
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paging.c
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kmalloc.c
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string.c
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driver.c
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vga.c
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tss.c
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process.c
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syscall.c
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cpio.c
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vfs.c
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initrd_fs.c
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devicefs.c
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sysfs.c
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ide.c
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mbr.c
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fat32.c
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floppy.c
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ne2000.c
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env.c
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keyboard.c
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interrupts.S
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kernel.c
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)
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# Use our custom linker script
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target_link_options(kernel PRIVATE -T ${CMAKE_CURRENT_SOURCE_DIR}/linker.ld)
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target_include_directories(kernel PRIVATE
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${CMAKE_SOURCE_DIR}/vendor
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${CMAKE_SOURCE_DIR}/include # If created later
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)
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