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Kernel: Introduce a new graphics subsystem

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This new subsystem is replacing the old code that was used to
create device nodes of framebuffer devices in /dev.

This subsystem includes for now 3 roles:
1. GraphicsManagement singleton object that is used in the boot
process to enumerate and initialize display devices.
2. GraphicsDevice(s) that are used to control the display adapter.
3. FramebufferDevice(s) that are used to control the device node in
/dev.

For now, we support the Bochs display adapter and any other
generic VGA compatible adapter that was configured by the boot
loader to a known and fixed resolution.

Two improvements in the Bochs display adapter code are that
we can support native bochs-display device (this device doesn't
expose any VGA capabilities) and also that we use the MMIO region,
to configure the device, instead of setting IO ports for such tasks.
This commit is contained in:
Liav A 2021-03-05 14:23:08 +02:00 • committed by Andreas Kling
parent 8515a1c49d
commit 6a728e2d76
18 changed files with 672 additions and 428 deletions
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29
Kernel/init.cpp
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@ -12,10 +12,8 @@
#include <Kernel/CMOS.h>
#include <Kernel/CommandLine.h>
#include <Kernel/DMI.h>
#include <Kernel/Devices/BXVGADevice.h>
#include <Kernel/Devices/FullDevice.h>
#include <Kernel/Devices/HID/HIDManagement.h>
#include <Kernel/Devices/MBVGADevice.h>
#include <Kernel/Devices/MemoryDevice.h>
#include <Kernel/Devices/NullDevice.h>
#include <Kernel/Devices/RandomDevice.h>
@ -26,6 +24,7 @@
#include <Kernel/Devices/ZeroDevice.h>
#include <Kernel/FileSystem/Ext2FileSystem.h>
#include <Kernel/FileSystem/VirtualFileSystem.h>
#include <Kernel/Graphics/GraphicsManagement.h>
#include <Kernel/Heap/SlabAllocator.h>
#include <Kernel/Heap/kmalloc.h>
#include <Kernel/Interrupts/APIC.h>
@ -233,30 +232,8 @@ void init_stage2(void*)
PCI::initialize();
auto boot_profiling = kernel_command_line().is_boot_profiling_enabled();
auto is_text_mode = kernel_command_line().is_text_mode();
if (is_text_mode) {
dbgln("Text mode enabled");
} else {
bool bxvga_found = false;
PCI::enumerate([&](const PCI::Address&, PCI::ID id) {
if ((id.vendor_id == 0x1234 && id.device_id == 0x1111) || (id.vendor_id == 0x80ee && id.device_id == 0xbeef))
bxvga_found = true;
});
if (bxvga_found) {
BXVGADevice::initialize();
} else {
if (multiboot_info_ptr->framebuffer_type == MULTIBOOT_FRAMEBUFFER_TYPE_RGB || multiboot_info_ptr->framebuffer_type == MULTIBOOT_FRAMEBUFFER_TYPE_EGA_TEXT) {
new MBVGADevice(
PhysicalAddress((u32)(multiboot_info_ptr->framebuffer_addr)),
multiboot_info_ptr->framebuffer_pitch,
multiboot_info_ptr->framebuffer_width,
multiboot_info_ptr->framebuffer_height);
} else {
BXVGADevice::initialize();
}
}
}
GraphicsManagement::the().initialize();
USB::UHCIController::detect();
@ -297,7 +274,7 @@ void init_stage2(void*)
int error;
// FIXME: It would be nicer to set the mode from userspace.
tty0->set_graphical(!is_text_mode);
tty0->set_graphical(!GraphicsManagement::the().is_text_mode_enabled());
RefPtr<Thread> thread;
auto userspace_init = kernel_command_line().userspace_init();
auto init_args = kernel_command_line().userspace_init_args();