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|
.set noreorder
.include "hwregs_a.h"
.text
.global DrawSyncCallback
.type DrawSyncCallback, @function
DrawSyncCallback:
addiu $sp, -8
sw $ra, 0($sp)
sw $a0, 4($sp)
jal EnterCriticalSection
nop
beqz $a0, .Luninstall
nop
la $a1, _drawsync_handler
lw $a1, 4($sp)
jal DMACallback
li $a0, 2
b .Lcontinue
nop
.Luninstall:
move $a1, $0
jal DMACallback
li $a0, 2
.Lcontinue:
lw $a0, 4($sp)
la $v1, _drawsync_func
lw $v0, 0($v1)
sw $a0, 0($v1)
sw $v0, 4($sp)
.Lexit:
jal ExitCriticalSection
nop
lw $ra, 0($sp)
lw $v0, 4($sp)
jr $ra
addiu $sp, 8
.type _drawsync_handler, @function
_drawsync_handler:
.Ldma_wait:
la $v0, _drawsync_func
lw $v0, 0($v0)
nop
beqz $v0, .Lskip
nop
addiu $sp, -4
sw $ra, 0($sp)
lw $v0, D2_CHCR($a0)
nop
srl $v0, 24
andi $v0, 0x1
bnez $v0, .Ldma_wait
nop
.Lgpu_wait:
jal ReadGPUstat
nop
srl $v0, 28
andi $v0, 0x1
beqz $v0, .Lgpu_wait
nop
la $v1, _drawsync_func
lw $v1, 0($v1)
lui $v0, 0x0400 # Set DMA direction to off
sw $v0, GP1($a0)
jalr $v1
nop
lw $ra, 0($sp)
addiu $sp, 4
.Lskip:
jr $ra
nop
.data
_drawsync_func:
.word 0
|
