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32x: change irq hadling, make it more drc friendly

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git-svn-id: file:///home/notaz/opt/svn/PicoDrive@816 be3aeb3a-fb24-0410-a615-afba39da0efa
This commit is contained in:
notaz 2009-10-14 14:46:38 +00:00
parent a8b03e2d4d
commit 6add7875b5
5 changed files with 46 additions and 25 deletions
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19
cpu/sh2/sh2.c
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@ -32,7 +32,7 @@ void sh2_reset(SH2 *sh2)
sh2->pending_int_irq = 0;
}
static void sh2_do_irq(SH2 *sh2, int level, int vector)
void sh2_do_irq(SH2 *sh2, int level, int vector)
{
sh2->irq_callback(sh2->is_slave, level);
@ -55,20 +55,23 @@ static void sh2_do_irq(SH2 *sh2, int level, int vector)
void sh2_irl_irq(SH2 *sh2, int level)
{
sh2->pending_irl = level;
if (level <= ((sh2->sr >> 4) & 0x0f))
return;
if (level > sh2->pending_int_irq)
sh2->pending_level = level;
else
sh2->pending_level = sh2->pending_int_irq;
sh2_do_irq(sh2, level, 64 + level/2);
sh2->test_irq = 1;
}
void sh2_internal_irq(SH2 *sh2, int level, int vector)
{
// FIXME: multiple internal irqs not handled..
// assuming internal irqs never clear until accepted
sh2->pending_int_irq = level;
sh2->pending_int_vector = vector;
if (level <= ((sh2->sr >> 4) & 0x0f))
return;
if (level > sh2->pending_level)
sh2->pending_level = level;
sh2_do_irq(sh2, level, vector);
sh2->pending_int_irq = 0; // auto-clear
sh2->test_irq = 1;
}