3 Commits

Author	SHA1	Message	Date
Bin Meng	ffe1c8379e	video: bochs: Avoid using IO instructions to access VGA IO port ... At present the driver uses IO instructions to access the legacy VGA IO ports, which unfortunately limits the driver to work only on x86. It turns out the IO instruction is not necessary as Bochs VGA card remaps the legacy VGA IO ports (0x3c0 -> 0x3df) to its memory mapped register space from offset 0x400. Update the driver to use MMIO access for VGA IO port. Signed-off-by: Bin Meng <bmeng@tinylab.org> Reviewed-by: Simon Glass <sjg@chromium.org> Tested-by: Simon Glass <sjg@chromium.org> # qemu-x86_64	2023-08-01 13:31:29 +02:00
Bin Meng	caae795a1c	video: bochs: Drop the useless argument of bochs_vga_write() ... bochs_vga_write() takes 'index' as one argument, but never uses it. While we are here, use macros instead of magic numbers for the VGA IO port register name and value. Signed-off-by: Bin Meng <bmeng@tinylab.org> Reviewed-by: Simon Glass <sjg@chromium.org> Tested-by: Simon Glass <sjg@chromium.org> # qemu-x86_64	2023-08-01 13:30:41 +02:00
Simon Glass	e2d934b4da	x86: video: Add a driver for QEMU bochs emulation ... Bochs is convenient with QEMU on x86 since it does not require a video BIOS. Add a driver for it. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>	2023-07-17 17:23:15 +08:00