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0ef1137e88
This helps solving an issue when we boot with text mode screen so the Kernel initializes an early text mode console, but even after disabling it, that console can still access VGA ports. This wouldn't be a problem for emulated hardware but bare metal hardware might have a "conflict", especially if the native driver explicitly request to disable the VGA emulation.
62 lines
1.9 KiB
C++
62 lines
1.9 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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void set_vga_text_mode_cursor(size_t console_width, size_t x, size_t y) const;
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void disable_vga_text_mode_console_cursor() const;
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void disable_vga_emulation_access_permanently();
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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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void enable_vga_text_mode_console_cursor() const;
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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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mutable RecursiveSpinlock m_main_vga_lock;
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bool m_vga_access_is_disabled { false };
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};
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}
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