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/*
* Copyright (c) 2025 Ian Marco Moffett and L5 engineers
* All rights reserved.
*
* 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.
* 3. Neither the name of the project nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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.
*/
/*
* Description: Interrupt vector handling core
* Author: Ian Marco Moffett
*/
#include <machine/frameasm.h>
#include <machine/idt.h>
.macro IDT_SET_VEC vec, isr
mov $\vec, %rdi
mov $IDT_INT_GATE, %rsi
lea \isr(%rip), %rdx
xor %rcx, %rcx
call idt_set_desc
.endm
.globl irq_init_pins
.text
irq_init_pins:
IDT_SET_VEC 37, ioapic_edge_0
IDT_SET_VEC 38, ioapic_edge_1
IDT_SET_VEC 39, ioapic_edge_2
IDT_SET_VEC 40, ioapic_edge_3
IDT_SET_VEC 41, ioapic_edge_4
IDT_SET_VEC 42, ioapic_edge_5
IDT_SET_VEC 43, ioapic_edge_6
IDT_SET_VEC 44, ioapic_edge_7
IDT_SET_VEC 45, ioapic_edge_8
IDT_SET_VEC 46, ioapic_edge_9
IDT_SET_VEC 47, ioapic_edge_10
IDT_SET_VEC 48, ioapic_edge_11
IDT_SET_VEC 49, ioapic_edge_12
IDT_SET_VEC 50, ioapic_edge_13
IDT_SET_VEC 51, ioapic_edge_14
IDT_SET_VEC 52, ioapic_edge_15
IDT_SET_VEC 53, ioapic_edge_16
IDT_SET_VEC 54, ioapic_edge_17
IDT_SET_VEC 55, ioapic_edge_18
IDT_SET_VEC 56, ioapic_edge_19
IDT_SET_VEC 57, ioapic_edge_20
IDT_SET_VEC 58, ioapic_edge_21
IDT_SET_VEC 59, ioapic_edge_22
IDT_SET_VEC 60, ioapic_edge_23
IDT_SET_VEC 61, ioapic_edge_24
IDT_SET_VEC 62, ioapic_edge_25
IDT_SET_VEC 63, ioapic_edge_26
IDT_SET_VEC 64, ioapic_edge_27
IDT_SET_VEC 65, ioapic_edge_28
IDT_SET_VEC 66, ioapic_edge_29
IDT_SET_VEC 67, ioapic_edge_30
IDT_SET_VEC 68, ioapic_edge_31
IDT_SET_VEC 69, ioapic_edge_32
IDT_SET_VEC 70, ioapic_edge_33
IDT_SET_VEC 71, ioapic_edge_34
IDT_SET_VEC 72, ioapic_edge_35
IDT_SET_VEC 73, ioapic_edge_36
IDT_SET_VEC 74, ioapic_edge_37
IDT_SET_VEC 75, ioapic_edge_38
IDT_SET_VEC 76, ioapic_edge_39
IDT_SET_VEC 77, ioapic_edge_40
IDT_SET_VEC 78, ioapic_edge_41
IDT_SET_VEC 79, ioapic_edge_42
IDT_SET_VEC 80, ioapic_edge_43
IDT_SET_VEC 81, ioapic_edge_44
IDT_SET_VEC 82, ioapic_edge_45
IDT_SET_VEC 83, ioapic_edge_46
IDT_SET_VEC 84, ioapic_edge_47
IDT_SET_VEC 85, ioapic_edge_48
IDT_SET_VEC 86, ioapic_edge_49
IDT_SET_VEC 87, ioapic_edge_50
IDT_SET_VEC 88, ioapic_edge_51
IDT_SET_VEC 89, ioapic_edge_52
IDT_SET_VEC 90, ioapic_edge_53
IDT_SET_VEC 91, ioapic_edge_54
IDT_SET_VEC 92, ioapic_edge_55
IDT_SET_VEC 93, ioapic_edge_56
IDT_SET_VEC 94, ioapic_edge_57
IDT_SET_VEC 95, ioapic_edge_58
IDT_SET_VEC 96, ioapic_edge_59
IDT_SET_VEC 97, ioapic_edge_60
IDT_SET_VEC 98, ioapic_edge_61
IDT_SET_VEC 99, ioapic_edge_62
IDT_SET_VEC 100, ioapic_edge_63
retq
ioapic_common:
xor %rcx, %rcx // Start at zero
.walk: // Begin the table walk
lea g_intrs(%rip), %rbx // BASE -> RBX
lea (%rbx, %rcx, 8), %rbx // RBX+RCX*8 -> RBX
mov (%rbx), %rdx // *RBX -> RDX
or %rdx, %rdx // Is it NULL?
jz 1f // Yes
mov (%rdx), %rbx // Get the handler
or %rbx, %rbx // Can we use this handler?
jz 1f // No, continue on
push %rcx // Save RCX between CALLs
call *%rbx // Indirect call
pop %rcx // We need RCX back now
cmp $0, %rax // Do we continue? (not handled)
jg done // Nope, handled
1: inc %rcx // Bump up RCX, next idx
cmp $256, %rcx // Are we through every?
jl .walk // Nope, continue
done: // End of loop
call lapic_eoi // Signal end of interrupt
retq
INTR_ENTRY(ioapic_edge_0)
call ioapic_common
INTR_EXIT(ioapic_edge_0)
INTR_ENTRY(ioapic_edge_1)
call ioapic_common
INTR_EXIT(ioapic_edge_1)
INTR_ENTRY(ioapic_edge_2)
call ioapic_common
INTR_EXIT(ioapic_edge_2)
INTR_ENTRY(ioapic_edge_3)
call ioapic_common
INTR_EXIT(ioapic_edge_3)
INTR_ENTRY(ioapic_edge_4)
call ioapic_common
INTR_EXIT(ioapic_edge_4)
INTR_ENTRY(ioapic_edge_5)
call ioapic_common
INTR_EXIT(ioapic_edge_5)
INTR_ENTRY(ioapic_edge_6)
call ioapic_common
INTR_EXIT(ioapic_edge_6)
INTR_ENTRY(ioapic_edge_7)
call ioapic_common
INTR_EXIT(ioapic_edge_7)
INTR_ENTRY(ioapic_edge_8)
call ioapic_common
INTR_EXIT(ioapic_edge_8)
INTR_ENTRY(ioapic_edge_9)
call ioapic_common
INTR_EXIT(ioapic_edge_9)
INTR_ENTRY(ioapic_edge_10)
call ioapic_common
INTR_EXIT(ioapic_edge_10)
INTR_ENTRY(ioapic_edge_11)
call ioapic_common
INTR_EXIT(ioapic_edge_11)
INTR_ENTRY(ioapic_edge_12)
call ioapic_common
INTR_EXIT(ioapic_edge_12)
INTR_ENTRY(ioapic_edge_13)
call ioapic_common
INTR_EXIT(ioapic_edge_13)
INTR_ENTRY(ioapic_edge_14)
call ioapic_common
INTR_EXIT(ioapic_edge_14)
INTR_ENTRY(ioapic_edge_15)
call ioapic_common
INTR_EXIT(ioapic_edge_15)
INTR_ENTRY(ioapic_edge_16)
call ioapic_common
INTR_EXIT(ioapic_edge_16)
INTR_ENTRY(ioapic_edge_17)
call ioapic_common
INTR_EXIT(ioapic_edge_17)
INTR_ENTRY(ioapic_edge_18)
call ioapic_common
INTR_EXIT(ioapic_edge_18)
INTR_ENTRY(ioapic_edge_19)
call ioapic_common
INTR_EXIT(ioapic_edge_19)
INTR_ENTRY(ioapic_edge_20)
call ioapic_common
INTR_EXIT(ioapic_edge_20)
INTR_ENTRY(ioapic_edge_21)
call ioapic_common
INTR_EXIT(ioapic_edge_21)
INTR_ENTRY(ioapic_edge_22)
call ioapic_common
INTR_EXIT(ioapic_edge_22)
INTR_ENTRY(ioapic_edge_23)
call ioapic_common
INTR_EXIT(ioapic_edge_23)
INTR_ENTRY(ioapic_edge_24)
call ioapic_common
INTR_EXIT(ioapic_edge_24)
INTR_ENTRY(ioapic_edge_25)
call ioapic_common
INTR_EXIT(ioapic_edge_25)
INTR_ENTRY(ioapic_edge_26)
call ioapic_common
INTR_EXIT(ioapic_edge_26)
INTR_ENTRY(ioapic_edge_27)
call ioapic_common
INTR_EXIT(ioapic_edge_27)
INTR_ENTRY(ioapic_edge_28)
call ioapic_common
INTR_EXIT(ioapic_edge_28)
INTR_ENTRY(ioapic_edge_29)
call ioapic_common
INTR_EXIT(ioapic_edge_29)
INTR_ENTRY(ioapic_edge_30)
call ioapic_common
INTR_EXIT(ioapic_edge_30)
INTR_ENTRY(ioapic_edge_31)
call ioapic_common
INTR_EXIT(ioapic_edge_31)
INTR_ENTRY(ioapic_edge_32)
call ioapic_common
INTR_EXIT(ioapic_edge_32)
INTR_ENTRY(ioapic_edge_33)
call ioapic_common
INTR_EXIT(ioapic_edge_33)
INTR_ENTRY(ioapic_edge_34)
call ioapic_common
INTR_EXIT(ioapic_edge_34)
INTR_ENTRY(ioapic_edge_35)
call ioapic_common
INTR_EXIT(ioapic_edge_35)
INTR_ENTRY(ioapic_edge_36)
call ioapic_common
INTR_EXIT(ioapic_edge_36)
INTR_ENTRY(ioapic_edge_37)
call ioapic_common
INTR_EXIT(ioapic_edge_37)
INTR_ENTRY(ioapic_edge_38)
call ioapic_common
INTR_EXIT(ioapic_edge_38)
INTR_ENTRY(ioapic_edge_39)
call ioapic_common
INTR_EXIT(ioapic_edge_39)
INTR_ENTRY(ioapic_edge_40)
call ioapic_common
INTR_EXIT(ioapic_edge_40)
INTR_ENTRY(ioapic_edge_41)
call ioapic_common
INTR_EXIT(ioapic_edge_41)
INTR_ENTRY(ioapic_edge_42)
call ioapic_common
INTR_EXIT(ioapic_edge_42)
INTR_ENTRY(ioapic_edge_43)
call ioapic_common
INTR_EXIT(ioapic_edge_43)
INTR_ENTRY(ioapic_edge_44)
call ioapic_common
INTR_EXIT(ioapic_edge_44)
INTR_ENTRY(ioapic_edge_45)
call ioapic_common
INTR_EXIT(ioapic_edge_45)
INTR_ENTRY(ioapic_edge_46)
call ioapic_common
INTR_EXIT(ioapic_edge_46)
INTR_ENTRY(ioapic_edge_47)
call ioapic_common
INTR_EXIT(ioapic_edge_47)
INTR_ENTRY(ioapic_edge_48)
call ioapic_common
INTR_EXIT(ioapic_edge_48)
INTR_ENTRY(ioapic_edge_49)
call ioapic_common
INTR_EXIT(ioapic_edge_49)
INTR_ENTRY(ioapic_edge_50)
call ioapic_common
INTR_EXIT(ioapic_edge_50)
INTR_ENTRY(ioapic_edge_51)
call ioapic_common
INTR_EXIT(ioapic_edge_51)
INTR_ENTRY(ioapic_edge_52)
call ioapic_common
INTR_EXIT(ioapic_edge_52)
INTR_ENTRY(ioapic_edge_53)
call ioapic_common
INTR_EXIT(ioapic_edge_53)
INTR_ENTRY(ioapic_edge_54)
call ioapic_common
INTR_EXIT(ioapic_edge_54)
INTR_ENTRY(ioapic_edge_55)
call ioapic_common
INTR_EXIT(ioapic_edge_55)
INTR_ENTRY(ioapic_edge_56)
call ioapic_common
INTR_EXIT(ioapic_edge_56)
INTR_ENTRY(ioapic_edge_57)
call ioapic_common
INTR_EXIT(ioapic_edge_57)
INTR_ENTRY(ioapic_edge_58)
call ioapic_common
INTR_EXIT(ioapic_edge_58)
INTR_ENTRY(ioapic_edge_59)
call ioapic_common
INTR_EXIT(ioapic_edge_59)
INTR_ENTRY(ioapic_edge_60)
call ioapic_common
INTR_EXIT(ioapic_edge_60)
INTR_ENTRY(ioapic_edge_61)
call ioapic_common
INTR_EXIT(ioapic_edge_61)
INTR_ENTRY(ioapic_edge_62)
call ioapic_common
INTR_EXIT(ioapic_edge_62)
INTR_ENTRY(ioapic_edge_63)
call ioapic_common
INTR_EXIT(ioapic_edge_63)
|
