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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:17:27 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:17:27 +0000 |
commit | f215e02bf85f68d3a6106c2a1f4f7f063f819064 (patch) | |
tree | 6bb5b92c046312c4e95ac2620b10ddf482d3fa8b /src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-PicSetup.c | |
parent | Initial commit. (diff) | |
download | virtualbox-f215e02bf85f68d3a6106c2a1f4f7f063f819064.tar.xz virtualbox-f215e02bf85f68d3a6106c2a1f4f7f063f819064.zip |
Adding upstream version 7.0.14-dfsg.upstream/7.0.14-dfsg
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-PicSetup.c | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-PicSetup.c b/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-PicSetup.c new file mode 100644 index 00000000..7db73469 --- /dev/null +++ b/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-PicSetup.c @@ -0,0 +1,90 @@ +/* $Id: bs3-cmn-PicSetup.c $ */ +/** @file + * BS3Kit - PIC Setup. + */ + +/* + * Copyright (C) 2007-2023 Oracle and/or its affiliates. + * + * This file is part of VirtualBox base platform packages, as + * available from https://www.virtualbox.org. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, in version 3 of the + * License. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see <https://www.gnu.org/licenses>. + * + * The contents of this file may alternatively be used under the terms + * of the Common Development and Distribution License Version 1.0 + * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included + * in the VirtualBox distribution, in which case the provisions of the + * CDDL are applicable instead of those of the GPL. + * + * You may elect to license modified versions of this file under the + * terms and conditions of either the GPL or the CDDL or both. + * + * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0 + */ + + +/********************************************************************************************************************************* +* Header Files * +*********************************************************************************************************************************/ +#include "bs3kit-template-header.h" +#include <iprt/asm-amd64-x86.h> +#include "bs3-cmn-pic.h" + + + +/** + * Configures the PIC, once only. + * + * Subsequent calls to this function will not do anything. + * + * The PIC will be programmed to use IDT/IVT vectors 0x70 thru 0x7f, auto + * end-of-interrupt, and all IRQs masked. The individual PIC users will have to + * use #Bs3PicUpdateMask unmask their IRQ once they've got all the handlers + * installed. + */ +#undef Bs3PicSetup +BS3_CMN_DEF(void, Bs3PicSetup,(bool fForcedReInit)) +{ + /* + * The first call configures the PIC to send interrupts to vectors 0x70 thru 0x7f, + * masking all of them. Things producing IRQs is responsible for configure their + * handlers and then(!) use Bs3PicUpdateMask to unmask the IRQ. + */ + if (!g_fBs3PicConfigured || fForcedReInit) + { + g_fBs3PicConfigured = true; + + /* Start init. */ + ASMOutU8(BS3_PIC_PORT_MASTER, BS3_PIC_CMD_INIT | BS3_PIC_CMD_INIT_F_4STEP); + ASMOutU8(BS3_PIC_PORT_SLAVE, BS3_PIC_CMD_INIT | BS3_PIC_CMD_INIT_F_4STEP); + + /* Set IRQ base. */ + ASMOutU8(BS3_PIC_PORT_MASTER + 1, 0x70); + ASMOutU8(BS3_PIC_PORT_SLAVE + 1, 0x78); + + /* Dunno. */ + ASMOutU8(BS3_PIC_PORT_MASTER + 1, 4); + ASMOutU8(BS3_PIC_PORT_SLAVE + 1, 2); + + /* Set IRQ base. */ + ASMOutU8(BS3_PIC_PORT_MASTER + 1, BS3_PIC_I4_F_AUTO_EOI); + ASMOutU8(BS3_PIC_PORT_SLAVE + 1, BS3_PIC_I4_F_AUTO_EOI); + + /* Mask everything. */ + ASMOutU8(BS3_PIC_PORT_MASTER + 1, UINT8_MAX); + ASMOutU8(BS3_PIC_PORT_SLAVE + 1, UINT8_MAX); + } +} + |