1 files changed, 131 insertions, 0 deletions
diff --git a/cpukit/score/cpu/x86_64/include/rtems/score/idt.h b/cpukit/score/cpu/x86_64/include/rtems/score/idt.h
new file mode 100644
index 0000000000..e1f69b1409
--- /dev/null
+++ b/cpukit/score/cpu/x86_64/include/rtems/score/idt.h
@@ -0,0 +1,131 @@
+/*
+ * 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