.extern sio_handler_callback
.extern sio_handler

sio_handler:
	addi $sp, -120
.set noat
	sw $at, 0($sp)
	mfhi $at
	sw $at, 112($sp)
	mflo $at
	sw $at, 116($sp)
.set at
	sw $v0, 4($sp)
	sw $v1, 8($sp)
	sw $a0, 12($sp)
	sw $a1, 16($sp)
	sw $a2, 20($sp)
	sw $a3, 24($sp)
	sw $t0, 28($sp)
	sw $t1, 32($sp)
	sw $t2, 36($sp)
	sw $t3, 40($sp)
	sw $t4, 44($sp)
	sw $t5, 48($sp)
	sw $t6, 52($sp)
	sw $t7, 56($sp)
	sw $s0, 60($sp)
	sw $s1, 64($sp)
	sw $s2, 68($sp)
	sw $s3, 72($sp)
	sw $s4, 76($sp)
	sw $s5, 80($sp)
	sw $s6, 84($sp)
	sw $s7, 88($sp)
	sw $t8, 92($sp)
	sw $t9, 96($sp)
	sw $gp, 100($sp)
	sw $s8, 104($sp)

	la $t0, sio_handler_callback
	lw $t1, 0($t0)

	addiu $sp, $sp, -24
	jalr $t1
	nop
	addiu $sp, $sp, 24

	li $t0, 0x1f801070 # IPENDING

	lw $t1, 0($t0)
	nop
	nop
	xori $t1, $t1, 0x100 # Acknowledge SIO IRQ
	sw $t1, 0($t0)

.set noat
	lw $at, 112($sp)
	nop
	mthi $at
	lw $at, 116($sp)
	nop
	mtlo $at
	lw $at, 0($sp)
.set at
	lw $v0, 4($sp)
	lw $v1, 8($sp)
	lw $a0, 12($sp)
	lw $a1, 16($sp)
	lw $a2, 20($sp)
	lw $a3, 24($sp)
	lw $t0, 28($sp)
	lw $t1, 32($sp)
	lw $t2, 36($sp)
	lw $t3, 40($sp)
	lw $t4, 44($sp)
	lw $t5, 48($sp)
	lw $t6, 52($sp)
	lw $t7, 56($sp)
	lw $s0, 60($sp)
	lw $s1, 64($sp)
	lw $s2, 68($sp)
	lw $s3, 72($sp)
	lw $s4, 76($sp)
	lw $s5, 80($sp)
	lw $s6, 84($sp)
	lw $s7, 88($sp)
	lw $t8, 92($sp)
	lw $t9, 96($sp)
	lw $gp, 100($sp)
	lw $s8, 104($sp)
	lw $ra, 108($sp)
	addi $sp, 120
	jr $ra
	nop