From dbfcd0e88e471564392549652d0bde2a967c34f4 Mon Sep 17 00:00:00 2001 From: Ian Moffett Date: Wed, 5 Jun 2024 20:58:51 -0400 Subject: kernel/amd64: Add initial LAPIC code Signed-off-by: Ian Moffett --- sys/include/arch/amd64/lapic.h | 39 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) create mode 100644 sys/include/arch/amd64/lapic.h (limited to 'sys/include/arch/amd64/lapic.h') diff --git a/sys/include/arch/amd64/lapic.h b/sys/include/arch/amd64/lapic.h new file mode 100644 index 0000000..8a6bb14 --- /dev/null +++ b/sys/include/arch/amd64/lapic.h @@ -0,0 +1,39 @@ +/* + * Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team. + * 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. + * 3. Neither the name of Hyra nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * 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 OWNER 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. + */ + +#ifndef _MACHINE_LAPIC_H_ +#define _MACHINE_LAPIC_H_ + +#include + +void lapic_init(void); + +extern uintptr_t g_lapic_base; + +#endif /* !_MACHINE_LAPIC_H_ */ -- cgit v1.2.3 From d5381223cea600ff007069bc1313de142cd06972 Mon Sep 17 00:00:00 2001 From: Ian Moffett Date: Sat, 8 Jun 2024 18:13:42 -0400 Subject: kernel/amd64: lapic: Add End-Of-Interrupt helper Signed-off-by: Ian Moffett --- sys/arch/amd64/amd64/lapic.c | 10 ++++++++++ sys/include/arch/amd64/lapic.h | 1 + 2 files changed, 11 insertions(+) (limited to 'sys/include/arch/amd64/lapic.h') diff --git a/sys/arch/amd64/amd64/lapic.c b/sys/arch/amd64/amd64/lapic.c index 07a9a49..b7cefd4 100644 --- a/sys/arch/amd64/amd64/lapic.c +++ b/sys/arch/amd64/amd64/lapic.c @@ -284,6 +284,16 @@ lapic_timer_init(void) return freq; } +/* + * Indicates that the current interrupt is finished + * being serviced. + */ +void +lapic_eoi(void) +{ + lapic_writel(LAPIC_EOI, 0); +} + void lapic_init(void) { diff --git a/sys/include/arch/amd64/lapic.h b/sys/include/arch/amd64/lapic.h index 8a6bb14..d06bcc9 100644 --- a/sys/include/arch/amd64/lapic.h +++ b/sys/include/arch/amd64/lapic.h @@ -33,6 +33,7 @@ #include void lapic_init(void); +void lapic_eoi(void); extern uintptr_t g_lapic_base; -- cgit v1.2.3