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https://github.com/RGBCube/serenity
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fafa339264
If there's no PCI bus, then it's safe to assume that the x86 machine we run on supports VGA text mode console output with an ISA VGA adapter. If this is the case, we just instantiate a ISAVGAAdapter object that assumes this situation and allows us to boot into VGA text mode console.
56 lines
1.6 KiB
C++
56 lines
1.6 KiB
C++
/*
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* Copyright (c) 2021-2022, Liav A. <liavalb@hotmail.co.il>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/NonnullOwnPtr.h>
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#include <AK/NonnullRefPtr.h>
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#include <AK/NonnullRefPtrVector.h>
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#include <AK/Types.h>
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#include <Kernel/Bus/PCI/Definitions.h>
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#include <Kernel/Graphics/Console/Console.h>
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#include <Kernel/Graphics/GenericGraphicsAdapter.h>
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#include <Kernel/Graphics/VGACompatibleAdapter.h>
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#include <Kernel/Graphics/VirtIOGPU/GraphicsAdapter.h>
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#include <Kernel/Memory/Region.h>
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namespace Kernel {
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class GraphicsManagement {
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public:
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static GraphicsManagement& the();
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static bool is_initialized();
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bool initialize();
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unsigned allocate_minor_device_number() { return m_current_minor_number++; };
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GraphicsManagement();
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bool framebuffer_devices_console_only() const;
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bool framebuffer_devices_use_bootloader_framebuffer() const;
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bool framebuffer_devices_exist() const;
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Spinlock& main_vga_lock() { return m_main_vga_lock; }
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RefPtr<Graphics::Console> console() const { return m_console; }
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void set_console(Graphics::Console&);
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void deactivate_graphical_mode();
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void activate_graphical_mode();
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private:
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bool determine_and_initialize_graphics_device(PCI::DeviceIdentifier const&);
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bool determine_and_initialize_isa_graphics_device();
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NonnullRefPtrVector<GenericGraphicsAdapter> m_graphics_devices;
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RefPtr<Graphics::Console> m_console;
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// Note: there could be multiple VGA adapters, but only one can operate in VGA mode
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RefPtr<VGACompatibleAdapter> m_vga_adapter;
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unsigned m_current_minor_number { 0 };
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Spinlock m_main_vga_lock;
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};
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}
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