From 1ee37245cd7342a649d50653b137e4ca626e88b4 Mon Sep 17 00:00:00 2001 From: Liav A Date: Tue, 21 Jan 2020 13:20:16 +0200 Subject: Kernel: Introduce IRQ sharing support The support is very basic - Each component that needs to handle IRQs inherits from InterruptHandler class. When the InterruptHandler constructor is called it registers itself in a SharedInterruptHandler. When an IRQ is fired, the SharedInterruptHandler is invoked, then it iterates through a list of the registered InterruptHandlers. Also, InterruptEnabler class was created to provide a way to enable IRQ handling temporarily, similar to InterruptDisabler (in CPU.h, which does the opposite). In addition to that a PCI::Device class has been added, that inherits from InterruptHandler. --- Kernel/PCI/Device.cpp | 46 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) create mode 100644 Kernel/PCI/Device.cpp (limited to 'Kernel/PCI/Device.cpp') diff --git a/Kernel/PCI/Device.cpp b/Kernel/PCI/Device.cpp new file mode 100644 index 0000000000..4a8e096b7a --- /dev/null +++ b/Kernel/PCI/Device.cpp @@ -0,0 +1,46 @@ +/* + * Copyright (c) 2020, Liav A. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, this + * list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER + * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, + * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include + +PCI::Device::Device(PCI::Address address) + : InterruptHandler(PCI::get_interrupt_line(address)) + , m_pci_address(address) +{ + // FIXME: Register PCI device somewhere... +} + +PCI::Device::Device(PCI::Address address, u8 interrupt_vector) + : InterruptHandler(interrupt_vector) + , m_pci_address(address) +{ + // FIXME: Register PCI device somewhere... +} + +PCI::Device::~Device() +{ + // FIXME: Unregister the device +} -- cgit v1.2.3