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34e7895d0a
- add initial support for aarch64 - SMP support is currently missing - uhyve and kernel are tested on Libre AML-S905X-CC (https://libre.computer/products/boards/aml-s905x-cc/) - only GICv2 support is integrated
108 lines
3.4 KiB
C
108 lines
3.4 KiB
C
/*
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* Copyright (c) 2017, Stefan Lankes, RWTH Aachen University
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/**
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* @author Stefan Lankes
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* @file arch/aarch64/include/asm/irq.h
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* @brief Functions related to IRQs
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*
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* This file contains functions and a pointer type related to interrupt requests.
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*/
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#ifndef __ARCH_IRQ_H__
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#define __ARCH_IRQ_H__
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#include <hermit/stddef.h>
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//#include <hermit/tasks_types.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* GIC related constants */
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#define GICD_BASE (1ULL << 39)
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#define GICC_BASE (GICD_BASE + GICD_SIZE)
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#define GIC_SIZE (GICD_SIZE + GICC_SIZE)
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#define GICD_SIZE 0x010000ULL
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#define GICC_SIZE 0x020000ULL
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/* interrupts */
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#define INT_PPI_VMAINT (16+9)
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#define INT_PPI_HYP_TIMER (16+10)
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#define INT_PPI_VIRT_TIMER (16+11)
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#define INT_PPI_SPHYS_TIMER (16+13)
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#define INT_PPI_NSPHYS_TIMER (16+14)
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/** @brief Pointer-type to IRQ-handling functions
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*
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* Whenever you write a IRQ-handling function it has to match this signature.
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*/
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typedef void (*irq_handler_t)(struct state *);
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/** @brief Install a custom IRQ handler for a given IRQ
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*
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* @param irq The desired irq
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* @param handler The handler to install
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*/
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int irq_install_handler(unsigned int irq, irq_handler_t handler);
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/** @brief Clear the handler for a given IRQ
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*
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* @param irq The handler's IRQ
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*/
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int irq_uninstall_handler(unsigned int irq);
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/** @brief Procedure to initialize IRQ
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*
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* This procedure is just a small collection of calls:
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* - idt_install();
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* - isrs_install();
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* - irq_install();
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*
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* @return Just returns 0 in any case
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*/
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static inline int irq_init(void) { return 0; }
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/** @brief reset the counters of the received interrupts
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*/
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void reset_irq_stats(void);
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/** @brief Print the number of received interrupts
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*/
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void print_irq_stats(void);
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/** @brief Switch from a fix to a dynamic timer period
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*
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* @return 0 on success
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*/
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inline static int enable_dynticks(void) { return 0; }
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#ifdef __cplusplus
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}
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#endif
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#endif
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