RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-09-14 22:36:17 +00:00
Code Issues Activity Actions

Kernel: Implement helpers to manipulate MSI(x) data structures

Browse source 
MSIx table entry is used to program interrupt vectors and it is
architecture specific. Add helper functions declaration in
Arch/PCIMSI.h. The definition of the function is placed in the
respective arch specific code.
This commit is contained in:
Pankaj Raghav 2023-05-05 14:37:26 +02:00 • committed by Jelle Raaijmakers
parent bf7ac06d7b
commit f0b6eb6932
4 changed files with 115 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

22
Kernel/Arch/x86_64/PCI/MSI.h Normal file
View file

@ -0,0 +1,22 @@
/*
* Copyright (c) 2023, Pankaj R <dev@pankajraghav.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
// Address register
static constexpr u32 msi_address_base = 0xfee00000;
static constexpr u8 msi_destination_shift = 12;
static constexpr u32 msi_redirection_hint = 0x00000008;
static constexpr u32 msi_destination_mode_logical = 0x00000004;
// Data register
static constexpr u8 msi_data_vector_mask = 0xff;
static constexpr u32 msi_trigger_mode_level = 0x00008000;
static constexpr u32 msi_level_assert = 0x00004000;
// Vector control
static constexpr u32 msi_vector_control_mask = 0x1;
static constexpr u32 msi_vector_control_unmask = ~(0x1);