source: trunk/hal/x86_64/core/hal_kentry.S

/*
 * hal_kentry.S - Entry points into the kernel (exceptions/interrupts/syscalls)
 *
 * Copyright (c) 2017 Maxime Villard
 *
 * This file is part of ALMOS-MKH.
 *
 * ALMOS-MKH is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2.0 of the License.
 *
 * ALMOS-MKH is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with ALMOS-MKH; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 */

#define x86_ASM
#include <hal_boot.h>
#include <hal_kentry.h>
#include <hal_apic.h>

#define TRAPENTRY(a)    \
        pushq   $(a);   \
        jmp     alltraps;

#define ZTRAPENTRY(a) \
        pushq   $0; \
        TRAPENTRY(a)

        .text
        .globl  hal_exception_entry
        .globl  hal_timer_intr
        .globl  ioc_ata_isr
        .globl  hal_com1_intr
        .globl  hal_keyboard_intr
        .type   hal_exception_entry, @function
        .type   hal_timer_intr, @function
        .type   ioc_ata_isr, @function
        .type   hal_com1_intr, @function
        .type   hal_keyboard_intr, @function

        /*
         * Syscall.
         */
ASM_ENTRY(x86_syscall)
        /* for now, panic */
        ZTRAPENTRY(T_RESERVED)

ASM_ENTRY(x86_syscall32)
        /* for now, panic */
        ZTRAPENTRY(T_RESERVED)

        /*
         * General exceptions.
         */
ASM_ENTRY(x86_trap00)
        ZTRAPENTRY(T_DIVIDE)

ASM_ENTRY(x86_trap01)
        ZTRAPENTRY(T_TRCTRAP)

ASM_ENTRY(x86_trap02)
        ZTRAPENTRY(T_NMI)

ASM_ENTRY(x86_trap03)
        ZTRAPENTRY(T_BPTFLT)

ASM_ENTRY(x86_trap04)
        ZTRAPENTRY(T_OFLOW)

ASM_ENTRY(x86_trap05)
        ZTRAPENTRY(T_BOUND)

ASM_ENTRY(x86_trap06)
        ZTRAPENTRY(T_PRIVINFLT)

ASM_ENTRY(x86_trap07)
        ZTRAPENTRY(T_DNA)

ASM_ENTRY(x86_trap08)
        TRAPENTRY(T_DOUBLEFLT)

ASM_ENTRY(x86_trap09)
        ZTRAPENTRY(T_FPOPFLT)

ASM_ENTRY(x86_trap0a)
        TRAPENTRY(T_TSSFLT)

ASM_ENTRY(x86_trap0b)
        TRAPENTRY(T_SEGNPFLT)

ASM_ENTRY(x86_trap0c)
        TRAPENTRY(T_STKFLT)

ASM_ENTRY(x86_trap0d)
        TRAPENTRY(T_PROTFLT)

ASM_ENTRY(x86_trap0e)
        TRAPENTRY(T_PAGEFLT)

ASM_ENTRY(x86_trap0f)
        ZTRAPENTRY(T_ASTFLT)

ASM_ENTRY(x86_trap10)
        ZTRAPENTRY(T_ARITHTRAP)

ASM_ENTRY(x86_trap11)
        TRAPENTRY(T_ALIGNFLT)

ASM_ENTRY(x86_trap12)
        ZTRAPENTRY(T_MCA)

ASM_ENTRY(x86_trap13)
        ZTRAPENTRY(T_XMM)

ASM_ENTRY(x86_trap14)
ASM_ENTRY(x86_trap15)
ASM_ENTRY(x86_trap16)
ASM_ENTRY(x86_trap17)
ASM_ENTRY(x86_trap18)
ASM_ENTRY(x86_trap19)
ASM_ENTRY(x86_trap1a)
ASM_ENTRY(x86_trap1b)
ASM_ENTRY(x86_trap1c)
ASM_ENTRY(x86_trap1d)
ASM_ENTRY(x86_trap1e)
ASM_ENTRY(x86_trap1f)
ASM_ENTRY(x86_rsvd)
        /* 20 - 31 reserved for future exp */
        ZTRAPENTRY(T_RESERVED)

        /*
         * APIC interrupts.
         */
ASM_ENTRY(x86_lapic_spurious)
        ZTRAPENTRY(T_ASTFLT)

ASM_ENTRY(x86_lapic_timer)
        pushq   $0
        pushq   $T_ASTFLT
        INTR_SAVE_REGS

        movq    lapic_va(%rip),%rax
        movl    $0,LAPIC_EOI(%rax)

        movq    %rsp,%rdi
        call    hal_timer_intr

        INTR_RESTORE_REGS
        addq    $16,%rsp
        iretq

ASM_ENTRY(x86_ioapic_ata0)
        pushq   $0
        pushq   $T_ASTFLT
        INTR_SAVE_REGS

        movq    %rsp,%rdi
        call    ioc_ata_isr

        movq    lapic_va(%rip),%rax
        movl    $0,LAPIC_EOI(%rax)

        INTR_RESTORE_REGS
        addq    $16,%rsp
        iretq

ASM_ENTRY(x86_ioapic_com1)
        pushq   $0
        pushq   $T_ASTFLT
        INTR_SAVE_REGS

        movq    %rsp,%rdi
        call    hal_com1_intr

        movq    lapic_va(%rip),%rax
        movl    $0,LAPIC_EOI(%rax)

        INTR_RESTORE_REGS
        addq    $16,%rsp
        iretq

ASM_ENTRY(x86_ioapic_keyboard)
        pushq   $0
        pushq   $T_ASTFLT
        INTR_SAVE_REGS

        movq    %rsp,%rdi
        call    hal_keyboard_intr

        movq    lapic_va(%rip),%rax
        movl    $0,LAPIC_EOI(%rax)

        INTR_RESTORE_REGS
        addq    $16,%rsp
        iretq

/*
 * Common entry point for exceptions.
 */
alltraps:
        INTR_SAVE_REGS

        movq    %rsp,%rdi
        call    hal_exception_entry

        movq    lapic_va(%rip),%rax
        movl    $0,LAPIC_EOI(%rax)

        INTR_RESTORE_REGS
        addq    $16,%rsp
        iretq

/*
 * Variables.
 */
        .data
        .globl  x86_traps
        .globl  x86_intrs
        .type   x86_traps, @object
        .type   x86_intrs, @object

        .align  64
x86_traps:
        .quad   x86_trap00, x86_trap01
        .quad   x86_trap02, x86_trap03
        .quad   x86_trap04, x86_trap05
        .quad   x86_trap06, x86_trap07
        .quad   x86_trap08, x86_trap09
        .quad   x86_trap0a, x86_trap0b
        .quad   x86_trap0c, x86_trap0d
        .quad   x86_trap0e, x86_trap0f
        .quad   x86_trap10, x86_trap11
        .quad   x86_trap12, x86_trap13
        .quad   x86_trap14, x86_trap15
        .quad   x86_trap16, x86_trap17
        .quad   x86_trap18, x86_trap19
        .quad   x86_trap1a, x86_trap1b
        .quad   x86_trap1c, x86_trap1d
        .quad   x86_trap1e, x86_trap1f

x86_intrs:
        .quad   x86_lapic_spurious
        .quad   x86_lapic_timer
        .quad   x86_ioapic_com1
        .quad   x86_ioapic_keyboard