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https://github.com/RGBCube/serenity
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20743e8aed
As we removed the support of VBE modesetting that was done by GRUB early on boot, we need to determine if we can modeset the resolution with our drivers, and if not, we should enable text mode and ensure that SystemServer knows about it too. Also, SystemServer should first check if there's a framebuffer device node, which is an indication that text mode was not even if it was requested. Then, if it doesn't find it, it should check what boot_mode argument the user specified (in case it's self-test). This way if we try to use bochs-display device (which is not VGA compatible) and request a text mode, it will not honor the request and will continue with graphical mode. Also try to print critical messages with mininum memory allocations possible. In LibVT, We make the implementation flexible for kernel-specific methods that are implemented in ConsoleImpl class.
62 lines
1.7 KiB
C++
62 lines
1.7 KiB
C++
/*
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* Copyright (c) 2021, 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/Graphics/Console/Console.h>
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#include <Kernel/Graphics/GraphicsDevice.h>
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#include <Kernel/Graphics/VGACompatibleAdapter.h>
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#include <Kernel/PCI/Definitions.h>
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#include <Kernel/VM/Region.h>
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namespace Kernel {
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class BochsGraphicsAdapter;
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class IntelNativeGraphicsAdapter;
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class VGACompatibleAdapter;
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class GraphicsManagement {
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friend class BochsGraphicsAdapter;
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friend class IntelNativeGraphicsAdapter;
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friend class VGACompatibleAdapter;
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AK_MAKE_ETERNAL
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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 current_minor_number() { return m_current_minor_number++; };
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GraphicsManagement();
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bool framebuffer_devices_allowed() const { return m_framebuffer_devices_allowed; }
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bool framebuffer_devices_exist() const;
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SpinLock<u8>& 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 deactivate_graphical_mode();
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void activate_graphical_mode();
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private:
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RefPtr<GraphicsDevice> determine_graphics_device(PCI::Address address, PCI::ID id) const;
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NonnullRefPtrVector<GraphicsDevice> m_graphics_devices;
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NonnullOwnPtr<Region> m_vga_font_region;
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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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const bool m_framebuffer_devices_allowed;
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SpinLock<u8> m_main_vga_lock;
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};
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}
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