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;; // SPDX-License-Identifier: Apache-2.0
;; // Copyright 2024-2026, Amlal El Mahrouss (amlal@nekernel.org)
;; // Licensed under the Apache License, Version 2.0 (see LICENSE file)
;; // Official repository: https://github.com/ne-foss-org/nekernel
section .text
extern rt_wait_400ns
global rt_out8
global rt_out16
global rt_out32
global rt_in8
global rt_in16
global rt_in32
rt_out8:
mov al, dl
mov dx, cx
out dx, al
ret
rt_out16:
mov ax, dx
mov dx, cx
out dx, ax
ret
rt_out32:
mov eax, edx
mov edx, ecx
out dx, eax
ret
rt_in8:
mov dx, cx
in al, dx
ret
rt_in16:
mov edx, ecx
in ax, dx
ret
rt_in32:
mov rdx, rcx
in eax, dx
ret
extern hal_system_call_enter
global mp_system_call_handler
mp_system_call_handler:
push rbp
mov rbp, rsp
push r8
push r9
push r10
push r11
push r12
push r13
push r14
push r15
jmp hal_system_call_enter
pop r15
pop r14
pop r13
pop r12
pop r11
pop r10
pop r9
pop r8
pop rbp
o64 iret
section .text
global sched_jump_to_task
sched_jump_to_task:
push rbp
mov rbp, rsp
mov ax, 0x33
mov ds, ax
mov es, ax
mov fs, ax
mov gs, ax
mov ax, 0x18
ltr ax
push 0x33
mov rdx, [rcx + 0x08]
push rdx
o64 pushf
push 0x2B
mov rdx, [rcx + 0x00]
push rdx
call sched_recover_registers
o64 iret
global sched_idle_task
sched_idle_task:
jmp $
ret
sched_recover_registers:
mov r8, [rcx + 0x10]
mov r9, [rcx + 0x18]
mov r10, [rcx + 0x20]
mov r11, [rcx + 0x28]
mov r12, [rcx + 0x30]
mov r13, [rcx + 0x38]
mov r14, [rcx + 0x40]
mov r15, [rcx + 0x48]
ret
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