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Kernel/Graphics: Move x86-specific support for VGA to Arch/x86 directory

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The new VGAIOArbiter class is now responsible to conduct x86-specific
instructions to control VGA hardware from the old ISA ports. This allows
us to ensure the GraphicsManagement code doesn't use x86-specific code,
thus allowing it to be compiled within non-x86 kernel builds.
This commit is contained in:
Liav A 2022-09-23 11:06:14 +03:00 • committed by Linus Groh
parent 8b9c056c5a
commit 48f3d762af
5 changed files with 154 additions and 30 deletions
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83
Kernel/Arch/x86/VGA/IOArbiter.cpp Normal file
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/*
* Copyright (c) 2022, Liav A. <liavalb@hotmail.co.il>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/Try.h>
#include <Kernel/Arch/Delay.h>
#include <Kernel/Arch/x86/CPU.h>
#include <Kernel/Arch/x86/IO.h>
#include <Kernel/Arch/x86/VGA/IOArbiter.h>
namespace Kernel {
NonnullOwnPtr<VGAIOArbiter> VGAIOArbiter::must_create(Badge<GraphicsManagement>)
{
return MUST(adopt_nonnull_own_or_enomem(new (nothrow) VGAIOArbiter()));
}
VGAIOArbiter::~VGAIOArbiter() = default;
VGAIOArbiter::VGAIOArbiter() = default;
void VGAIOArbiter::disable_vga_emulation_access_permanently(Badge<GraphicsManagement>)
{
SpinlockLocker locker(m_main_vga_lock);
disable_vga_text_mode_console_cursor();
IO::out8(0x3c4, 1);
u8 sr1 = IO::in8(0x3c5);
IO::out8(0x3c5, sr1 | 1 << 5);
microseconds_delay(1000);
m_vga_access_is_disabled = true;
}
void VGAIOArbiter::enable_vga_text_mode_console_cursor(Badge<GraphicsManagement>)
{
enable_vga_text_mode_console_cursor();
}
void VGAIOArbiter::enable_vga_text_mode_console_cursor()
{
SpinlockLocker locker(m_main_vga_lock);
if (m_vga_access_is_disabled)
return;
IO::out8(0x3D4, 0xA);
IO::out8(0x3D5, 0);
}
void VGAIOArbiter::disable_vga_text_mode_console_cursor(Badge<GraphicsManagement>)
{
disable_vga_text_mode_console_cursor();
}
void VGAIOArbiter::disable_vga_text_mode_console_cursor()
{
SpinlockLocker locker(m_main_vga_lock);
if (m_vga_access_is_disabled)
return;
IO::out8(0x3D4, 0xA);
IO::out8(0x3D5, 0x20);
}
void VGAIOArbiter::unblank_screen(Badge<GraphicsManagement>)
{
SpinlockLocker locker(m_main_vga_lock);
if (m_vga_access_is_disabled)
return;
IO::out8(0x3c0, 0x20);
}
void VGAIOArbiter::set_vga_text_mode_cursor(Badge<GraphicsManagement>, size_t console_width, size_t x, size_t y)
{
SpinlockLocker locker(m_main_vga_lock);
if (m_vga_access_is_disabled)
return;
enable_vga_text_mode_console_cursor();
u16 value = y * console_width + x;
IO::out8(0x3d4, 0x0e);
IO::out8(0x3d5, MSB(value));
IO::out8(0x3d4, 0x0f);
IO::out8(0x3d5, LSB(value));
}
}