Commit Graph

12 Commits

Author SHA1 Message Date
Bananymous ff2486f58c Bootloader: Try to enable A20 line if it is disabled
VirtualBox seems to have A20 disabled by default
2024-01-12 02:55:06 +02:00
Bananymous 2fec718590 Bootloader: cleanup code 2024-01-08 10:50:55 +02:00
Bananymous ccaa159a73 Bootloader: Add support for ext2 blocks up to 4 KiB
This should work with blocks bigger than that, but my linux system
only supports up to 4 KiB, so I cannot test this.

This allows getting rid of forced block size in mkfs and let the
program select appropriately sized blocks.
2024-01-03 18:26:03 +02:00
Bananymous 7356a83a44 Bootloader: Optimize some unnecessary branches on carry add/sub 2024-01-03 17:05:33 +02:00
Bananymous 2a68df81e2 Bootloader: Fix bootloader on bochs
Bochs int 0x10 seems to scrap full ebp and top bits in some
registers. I now save all 32-bit registers on call frame. Also
ebp is across all int 0x10 calls.
2024-01-03 13:09:55 +02:00
Bananymous 50ca2ac09e Bootloader: Interpret 0x7F (DEL) as backspace
This allows backspace to work over qemu's serial connection
2024-01-03 11:58:50 +02:00
Bananymous 3f3e81fcf2 Bootloader: Align boot information passed to kernel
UBSAN found this bug
2023-12-14 10:52:51 +02:00
Bananymous abc69fa3d5 Bootloader: Search framebuffer information from kernel memory
Framebuffer information is no longer hard coded into bootloader.
Kernel can define framebuffer info structure in its memory which is
used for finding proper video mode.
2023-12-09 17:32:10 +02:00
Bananymous 8b01e2d4a2 Bootloader: Generalize framebuffer video mode search
Framebuffer size is now taken as arguments to vesa_find_video_mode
2023-12-09 16:48:04 +02:00
Bananymous 25485069e6 Bootloader: Add cache to ext2 inode data block indices
This reduces the number of read calls with current kernel size from
~1700 to ~700 (60% performance boots). Loading the kernel is now alot
faster.
2023-11-22 13:54:53 +02:00
Bananymous f80bd040c8 Bootloader: add missing size directive 2023-11-21 19:11:48 +02:00
Bananymous cd646a1ab7 Bootloader do some directory restructuring 2023-11-18 13:59:45 +02:00