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9ee098b119
Like the HID, Audio and Storage subsystem, the Graphics subsystem (which
handles GPUs technically) exposes unix device files (typically in /dev).
To ensure consistency across the repository, move all related files to a
new directory under Kernel/Devices called "GPU".
Also remove the redundant "GPU" word from the VirtIO driver directory,
and the word "Graphics" from GraphicsManagement.{h,cpp} filenames.
155 lines
4.3 KiB
C++
155 lines
4.3 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/PrintfImplementation.h>
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#include <AK/StringView.h>
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#include <AK/Types.h>
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#include <Kernel/Arch/DebugOutput.h>
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#if ARCH(X86_64)
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# include <Kernel/Arch/x86_64/BochsDebugOutput.h>
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#endif
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#include <Kernel/Devices/DeviceManagement.h>
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#include <Kernel/Devices/GPU/Console/BootFramebufferConsole.h>
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#include <Kernel/Devices/GPU/Management.h>
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#include <Kernel/Devices/Generic/ConsoleDevice.h>
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#include <Kernel/Devices/PCISerialDevice.h>
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#include <Kernel/Locking/Spinlock.h>
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#include <Kernel/TTY/ConsoleManagement.h>
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#include <Kernel/kstdio.h>
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namespace Kernel {
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extern Atomic<Graphics::Console*> g_boot_console;
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}
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static bool s_serial_debug_enabled;
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// A recursive spinlock allows us to keep writing in the case where a
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// page fault happens in the middle of a dbgln(), etc
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static RecursiveSpinlock<LockRank::None> s_log_lock {};
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void set_serial_debug_enabled(bool desired_state)
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{
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s_serial_debug_enabled = desired_state;
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}
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bool is_serial_debug_enabled()
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{
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return s_serial_debug_enabled;
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}
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static void serial_putch(char ch)
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{
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if (PCISerialDevice::is_available())
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return PCISerialDevice::the().put_char(ch);
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debug_output(ch);
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}
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static void critical_console_out(char ch)
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{
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if (s_serial_debug_enabled)
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serial_putch(ch);
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#if ARCH(X86_64)
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// No need to output things to the real ConsoleDevice as no one is likely
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// to read it (because we are in a fatal situation, so only print things and halt)
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bochs_debug_output(ch);
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#endif
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// We emit chars directly to the string. this is necessary in few cases,
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// especially when we want to avoid any memory allocations...
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if (GraphicsManagement::is_initialized() && GraphicsManagement::the().console()) {
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GraphicsManagement::the().console()->write(ch, true);
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} else if (auto* boot_console = g_boot_console.load()) {
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boot_console->write(ch, true);
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}
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}
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static void console_out(char ch)
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{
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if (s_serial_debug_enabled)
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serial_putch(ch);
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// It would be bad to reach the assert in ConsoleDevice()::the() and do a stack overflow
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if (DeviceManagement::the().is_console_device_attached()) {
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DeviceManagement::the().console_device().put_char(ch);
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} else {
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#if ARCH(X86_64)
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bochs_debug_output(ch);
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#endif
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}
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if (ConsoleManagement::is_initialized()) {
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ConsoleManagement::the().debug_tty()->emit_char(ch);
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} else if (auto* boot_console = g_boot_console.load()) {
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boot_console->write(ch, true);
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}
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}
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// Declare it, so that the symbol is exported, because libstdc++ uses it.
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// However, *only* libstdc++ uses it, and none of the rest of the Kernel.
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extern "C" int sprintf(char* buffer, char const* fmt, ...);
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int sprintf(char*, char const*, ...)
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{
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VERIFY_NOT_REACHED();
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}
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static inline void internal_dbgputch(char ch)
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{
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if (s_serial_debug_enabled)
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serial_putch(ch);
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#if ARCH(X86_64)
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bochs_debug_output(ch);
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#endif
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}
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extern "C" void dbgputchar(char ch)
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{
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internal_dbgputch(ch);
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}
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extern "C" void dbgputstr(char const* characters, size_t length)
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{
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if (!characters)
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return;
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SpinlockLocker lock(s_log_lock);
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for (size_t i = 0; i < length; ++i)
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internal_dbgputch(characters[i]);
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}
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void dbgputstr(StringView view)
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{
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::dbgputstr(view.characters_without_null_termination(), view.length());
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}
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extern "C" void kernelputstr(char const* characters, size_t length)
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{
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if (!characters)
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return;
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SpinlockLocker lock(s_log_lock);
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for (size_t i = 0; i < length; ++i)
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console_out(characters[i]);
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}
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extern "C" void kernelcriticalputstr(char const* characters, size_t length)
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{
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if (!characters)
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return;
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SpinlockLocker lock(s_log_lock);
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for (size_t i = 0; i < length; ++i)
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critical_console_out(characters[i]);
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}
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extern "C" void kernelearlyputstr(char const* characters, size_t length)
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{
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if (!characters)
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return;
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// NOTE: We do not lock the log lock here, as this function is called before this or any other processor was initialized, meaning:
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// A) The $gs base was not setup yet, so we cannot enter into critical sections, and as a result we cannot use SpinLocks
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// B) No other processors may try to print at the same time anyway
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for (size_t i = 0; i < length; ++i)
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internal_dbgputch(characters[i]);
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}
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