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/*
* Copyright (c) 2018.
* Amaan Cheval <amaan.cheval@gmail.com>
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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 _RTEMS_SCORE_IDT_H
#define _RTEMS_SCORE_IDT_H
#include <rtems/score/basedefs.h>
#include <rtems/rtems/intr.h>
#ifdef __cplusplus
extern "C" {
#endif
#define IDT_INTERRUPT_GATE (0b1110)
#define IDT_PRESENT (0b10000000)
/*
* XXX: The IDT size should be smaller given that we likely won't map all 256
* vectors, but for simplicity, this works better.
*/
#define IDT_SIZE 256
/* Target vector number for spurious IRQs */
#define BSP_VECTOR_SPURIOUS 0xFF
/* Target vector number for the APIC timer */
#define BSP_VECTOR_APIC_TIMER 32
typedef struct _interrupt_descriptor {
uint16_t offset_0; // bits 0-15
uint16_t segment_selector; // a segment selector in the GDT or LDT
/* bits 0-2 are the offset into the IST, stored in the TSS */
uint8_t interrupt_stack_table;
uint8_t type_and_attributes;
uint16_t offset_1; // bits 16-31
uint32_t offset_2; // bits 32-63
uint32_t reserved_zero;
} interrupt_descriptor;
extern interrupt_descriptor amd64_idt[IDT_SIZE];
struct idt_record {
uint16_t limit; /* Size of IDT array - 1 */
uintptr_t base; /* Pointer to IDT array */
} RTEMS_PACKED;
RTEMS_STATIC_ASSERT(
sizeof(struct idt_record) == 10,
"IDT pointer must be exactly 10 bytes"
);
void lidt(struct idt_record *idtr);
interrupt_descriptor amd64_create_interrupt_descriptor(
uintptr_t handler, uint8_t types_and_attributes
);
uintptr_t amd64_get_handler_from_idt(uint32_t vector);
void amd64_install_raw_interrupt(
uint32_t vector, uintptr_t new_handler, uintptr_t *old_handler
);
/*
* Called by _ISR_Handler to dispatch "RTEMS interrupts", i.e. call the
* registered RTEMS ISR.
*/
void amd64_dispatch_isr(rtems_vector_number vector);
/* Defined in isr_handler.S */
extern void rtems_irq_prologue_0(void);
extern void rtems_irq_prologue_1(void);
extern void rtems_irq_prologue_2(void);
extern void rtems_irq_prologue_3(void);
extern void rtems_irq_prologue_4(void);
extern void rtems_irq_prologue_5(void);
extern void rtems_irq_prologue_6(void);
extern void rtems_irq_prologue_7(void);
extern void rtems_irq_prologue_8(void);
extern void rtems_irq_prologue_9(void);
extern void rtems_irq_prologue_10(void);
extern void rtems_irq_prologue_11(void);
extern void rtems_irq_prologue_12(void);
extern void rtems_irq_prologue_13(void);
extern void rtems_irq_prologue_14(void);
extern void rtems_irq_prologue_15(void);
extern void rtems_irq_prologue_16(void);
extern void rtems_irq_prologue_17(void);
extern void rtems_irq_prologue_18(void);
extern void rtems_irq_prologue_19(void);
extern void rtems_irq_prologue_20(void);
extern void rtems_irq_prologue_21(void);
extern void rtems_irq_prologue_22(void);
extern void rtems_irq_prologue_23(void);
extern void rtems_irq_prologue_24(void);
extern void rtems_irq_prologue_25(void);
extern void rtems_irq_prologue_26(void);
extern void rtems_irq_prologue_27(void);
extern void rtems_irq_prologue_28(void);
extern void rtems_irq_prologue_29(void);
extern void rtems_irq_prologue_30(void);
extern void rtems_irq_prologue_31(void);
extern void rtems_irq_prologue_32(void);
#ifdef __cplusplus
}
#endif
#endif
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