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1 jermar 1
/*
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 * Copyright (C) 2001-2004 Jakub Jermar
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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
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 * are met:
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 *
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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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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * 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
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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1703 jermar 29
/** @addtogroup ia32interrupt
1702 cejka 30
 * @{
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 */
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/** @file
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 */
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#ifndef KERN_ia32_INTERRUPT_H_
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#define KERN_ia32_INTERRUPT_H_
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#include <arch/types.h>
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#include <arch/pm.h>
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#define IVT_ITEMS       IDT_ITEMS
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#define IVT_FIRST       0
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#define EXC_COUNT   32
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#define IRQ_COUNT   16
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1 jermar 47
#define IVT_EXCBASE     0
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#define IVT_IRQBASE     (IVT_EXCBASE + EXC_COUNT)
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#define IVT_FREEBASE    (IVT_IRQBASE + IRQ_COUNT)
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#define IRQ_CLK         0
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#define IRQ_KBD         1
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#define IRQ_PIC1        2
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#define IRQ_PIC_SPUR    7
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/* this one must have four least significant bits set to ones */
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#define VECTOR_APIC_SPUR    (IVT_ITEMS - 1)
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#if (((VECTOR_APIC_SPUR + 1) % 16) || VECTOR_APIC_SPUR >= IVT_ITEMS)
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#error Wrong definition of VECTOR_APIC_SPUR
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#endif
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#define VECTOR_DEBUG                1
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#define VECTOR_CLK                  (IVT_IRQBASE + IRQ_CLK)
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#define VECTOR_PIC_SPUR             (IVT_IRQBASE + IRQ_PIC_SPUR)
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#define VECTOR_SYSCALL              IVT_FREEBASE
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#define VECTOR_TLB_SHOOTDOWN_IPI    (IVT_FREEBASE + 1)
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#define VECTOR_DEBUG_IPI            (IVT_FREEBASE + 2)
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958 jermar 70
struct istate {
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    uint32_t eax;
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    uint32_t ecx;
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    uint32_t edx;
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    uint32_t esi;
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    uint32_t edi;
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    uint32_t ebp;
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    uint32_t ebx;
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    uint32_t gs;
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    uint32_t fs;
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    uint32_t es;
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    uint32_t ds;
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    uint32_t error_word;
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    uint32_t eip;
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    uint32_t cs;
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    uint32_t eflags;
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    uint32_t stack[];
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};
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/** Return true if exception happened while in userspace */
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static inline int istate_from_uspace(istate_t *istate)
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{
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    return !(istate->eip & 0x80000000);
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}
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static inline void istate_set_retaddr(istate_t *istate, uintptr_t retaddr)
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{
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    istate->eip = retaddr;
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}
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static inline unative_t istate_get_pc(istate_t *istate)
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{
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    return istate->eip;
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}
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1780 jermar 107
extern void (* disable_irqs_function)(uint16_t irqmask);
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extern void (* enable_irqs_function)(uint16_t irqmask);
1 jermar 109
extern void (* eoi_function)(void);
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1956 decky 111
extern void decode_istate(istate_t *istate);
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extern void interrupt_init(void);
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extern void trap_virtual_enable_irqs(uint16_t irqmask);
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extern void trap_virtual_disable_irqs(uint16_t irqmask);
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#endif
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1703 jermar 118
/** @}
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 */