mirror of
https://github.com/RGBCube/serenity
synced 2025-05-26 00:55:08 +00:00
e2ed6ef741
The mmap interface was removed when we introduced the DisplayConnector class, as it was quite unsafe to use and didn't handle switching between graphical and text modes safely. By using the SharedFramebufferVMObject, we are able to elegantly coordinate the switch by remapping the attached mmap'ed-Memory::Region(s) with different mappings, therefore, keeping WindowServer to think that the mappings it has are still valid, while they are going to a different physical range until we are back to the graphical mode (after a switch from text mode). Most drivers take advantage of the fact that we know where is the actual framebuffer in physical memory space, the SharedFramebufferVMObject is created with that information. However, the VirtIO driver is different in that aspect, because it relies on DMA transactions to show graphics on the framebuffer, so the SharedFramebufferVMObject is created with that mindset to support the arbitrary framebuffer location in physical memory space.
44 lines
1.4 KiB
C++
44 lines
1.4 KiB
C++
/*
|
|
* Copyright (c) 2022, Liav A. <liavalb@hotmail.co.il>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <AK/RefPtr.h>
|
|
#include <AK/Try.h>
|
|
#include <Kernel/Graphics/Bochs/DisplayConnector.h>
|
|
#include <Kernel/Graphics/Console/GenericFramebufferConsole.h>
|
|
#include <Kernel/Locking/Spinlock.h>
|
|
#include <Kernel/Memory/TypedMapping.h>
|
|
|
|
namespace Kernel {
|
|
|
|
struct BochsDisplayMMIORegisters;
|
|
class QEMUDisplayConnector final
|
|
: public BochsDisplayConnector {
|
|
friend class BochsGraphicsAdapter;
|
|
friend class DeviceManagement;
|
|
|
|
public:
|
|
static NonnullRefPtr<QEMUDisplayConnector> must_create(PhysicalAddress framebuffer_address, size_t framebuffer_resource_size, Memory::TypedMapping<BochsDisplayMMIORegisters volatile>);
|
|
|
|
virtual IndexID index_id() const override;
|
|
|
|
private:
|
|
ErrorOr<void> fetch_and_initialize_edid();
|
|
QEMUDisplayConnector(PhysicalAddress framebuffer_address, size_t framebuffer_resource_size, Memory::TypedMapping<BochsDisplayMMIORegisters volatile>);
|
|
|
|
virtual bool double_framebuffering_capable() const override { return true; }
|
|
virtual ErrorOr<void> set_mode_setting(ModeSetting const&) override;
|
|
virtual ErrorOr<void> set_y_offset(size_t y) override;
|
|
virtual ErrorOr<void> unblank() override;
|
|
|
|
void set_framebuffer_to_big_endian_format();
|
|
void set_framebuffer_to_little_endian_format();
|
|
|
|
private:
|
|
Memory::TypedMapping<BochsDisplayMMIORegisters volatile> m_registers;
|
|
};
|
|
}
|