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ac7ce12123
This was a premature optimization from the early days of SerenityOS. The eternal heap was a simple bump pointer allocator over a static byte array. My original idea was to avoid heap fragmentation and improve data locality, but both ideas were rooted in cargo culting, not data. We would reserve 4 MiB at boot and only ended up using ~256 KiB, wasting the rest. This patch replaces all kmalloc_eternal() usage by regular kmalloc().
75 lines
2.4 KiB
C++
75 lines
2.4 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/Types.h>
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#include <Kernel/Bus/PCI/Device.h>
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#include <Kernel/Graphics/Console/GenericFramebufferConsole.h>
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#include <Kernel/Graphics/FramebufferDevice.h>
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#include <Kernel/Graphics/GenericGraphicsAdapter.h>
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#include <Kernel/Memory/TypedMapping.h>
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#include <Kernel/PhysicalAddress.h>
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namespace Kernel {
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class GraphicsManagement;
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struct BochsDisplayMMIORegisters;
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class BochsGraphicsAdapter final : public GenericGraphicsAdapter
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, public PCI::Device {
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friend class GraphicsManagement;
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private:
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TYPEDEF_DISTINCT_ORDERED_ID(u16, IndexID);
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public:
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static NonnullRefPtr<BochsGraphicsAdapter> initialize(PCI::DeviceIdentifier const&);
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virtual ~BochsGraphicsAdapter() = default;
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virtual bool framebuffer_devices_initialized() const override { return !m_framebuffer_device.is_null(); }
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virtual bool modesetting_capable() const override { return true; }
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virtual bool double_framebuffering_capable() const override { return true; }
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virtual bool vga_compatible() const override;
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private:
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// ^GenericGraphicsAdapter
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virtual bool try_to_set_resolution(size_t output_port_index, size_t width, size_t height) override;
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virtual bool set_y_offset(size_t output_port_index, size_t y) override;
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virtual void initialize_framebuffer_devices() override;
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virtual void enable_consoles() override;
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virtual void disable_consoles() override;
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explicit BochsGraphicsAdapter(PCI::DeviceIdentifier const&);
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IndexID index_id() const;
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void set_safe_resolution();
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void unblank();
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bool validate_setup_resolution(size_t width, size_t height);
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u32 find_framebuffer_address();
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void set_resolution_registers(size_t width, size_t height);
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void set_resolution_registers_via_io(size_t width, size_t height);
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bool validate_setup_resolution_with_io(size_t width, size_t height);
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void set_y_offset(size_t);
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void set_framebuffer_to_big_endian_format();
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void set_framebuffer_to_little_endian_format();
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PhysicalAddress m_mmio_registers;
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Memory::TypedMapping<BochsDisplayMMIORegisters volatile> m_registers;
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RefPtr<FramebufferDevice> m_framebuffer_device;
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RefPtr<Graphics::GenericFramebufferConsole> m_framebuffer_console;
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Spinlock m_console_mode_switch_lock;
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bool m_console_enabled { false };
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bool m_io_required { false };
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bool m_is_vga_capable { false };
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};
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}
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