134 lines
3.2 KiB
C++
134 lines
3.2 KiB
C++
/*
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* Copyright (c) 2011, 2012, 2013, 2014, 2017, 2021 Jonas 'Sortie' Termansen.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* sortix/kernel/interrupt.h
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* High level interrupt services.
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*/
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#ifndef _INCLUDE_SORTIX_KERNEL_INTERRUPT_H
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#define _INCLUDE_SORTIX_KERNEL_INTERRUPT_H
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#include <stddef.h>
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#include <sortix/kernel/decl.h>
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#include <sortix/kernel/registers.h>
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namespace Sortix {
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struct interrupt_context;
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class Thread;
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struct interrupt_handler
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{
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void (*handler)(struct interrupt_context*, void*);
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void* context;
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struct interrupt_handler* next;
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struct interrupt_handler* prev;
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};
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struct interrupt_work
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{
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struct interrupt_work* next;
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void (*handler)(void*);
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void* context;
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};
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} // namespace Sortix
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namespace Sortix {
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namespace Interrupt {
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#if defined(__i386__) || defined(__x86_64__)
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const unsigned int IRQ0 = 32;
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const unsigned int IRQ1 = 33;
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const unsigned int IRQ2 = 34;
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const unsigned int IRQ3 = 35;
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const unsigned int IRQ4 = 36;
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const unsigned int IRQ5 = 37;
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const unsigned int IRQ6 = 38;
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const unsigned int IRQ7 = 39;
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const unsigned int IRQ8 = 40;
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const unsigned int IRQ9 = 41;
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const unsigned int IRQ10 = 42;
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const unsigned int IRQ11 = 43;
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const unsigned int IRQ12 = 44;
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const unsigned int IRQ13 = 45;
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const unsigned int IRQ14 = 46;
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const unsigned int IRQ15 = 47;
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#endif
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extern "C" unsigned long asm_is_cpu_interrupted;
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inline bool IsEnabled()
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{
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#if defined(__i386__) || defined(__x86_64__)
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unsigned long is_enabled;
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asm("pushf\t\n"
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"pop %0\t\n"
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"and $0x000200, %0" : "=r"(is_enabled));
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return is_enabled != 0;
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#else
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#warning "You need to implement checking if interrupts are on"
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#endif
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}
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inline void Enable()
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{
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#if defined(__i386__) || defined(__x86_64__)
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asm volatile("sti");
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#else
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#warning "You need to implement enabling interrupts"
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#endif
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}
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inline void Disable()
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{
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#if defined(__i386__) || defined(__x86_64__)
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asm volatile("cli");
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#else
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#warning "You need to implement disabling interrupts"
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#endif
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}
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inline bool IsCPUInterrupted()
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{
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return asm_is_cpu_interrupted != 0;
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}
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inline bool SetEnabled(bool is_enabled)
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{
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bool was_enabled = IsEnabled();
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if ( is_enabled )
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Enable();
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else
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Disable();
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return was_enabled;
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}
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void RegisterHandler(unsigned int index, struct interrupt_handler* handler);
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void UnregisterHandler(unsigned int index, struct interrupt_handler* handler);
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void Init();
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void WorkerThread(void* user);
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void ScheduleWork(struct interrupt_work* work);
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extern Thread* interrupt_worker_thread;
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extern bool interrupt_worker_thread_boost;
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} // namespace Interrupt
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} // namespace Sortix
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#endif
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