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32x: new SH2 memory handling, hopefully faster

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git-svn-id: file:///home/notaz/opt/svn/PicoDrive@817 be3aeb3a-fb24-0410-a615-afba39da0efa
This commit is contained in:
notaz 2009-10-15 20:03:23 +00:00
parent 6add7875b5
commit bcf65fd674
7 changed files with 377 additions and 221 deletions
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10
cpu/sh2/sh2.c
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@ -25,8 +25,8 @@ void sh2_finish(SH2 *sh2)
void sh2_reset(SH2 *sh2)
{
sh2->pc = p32x_sh2_read32(0, sh2->is_slave);
sh2->r[15] = p32x_sh2_read32(4, sh2->is_slave);
sh2->pc = p32x_sh2_read32(0, sh2);
sh2->r[15] = p32x_sh2_read32(4, sh2);
sh2->sr = I;
sh2->vbr = 0;
sh2->pending_int_irq = 0;
@ -37,15 +37,15 @@ void sh2_do_irq(SH2 *sh2, int level, int vector)
sh2->irq_callback(sh2->is_slave, level);
sh2->r[15] -= 4;
p32x_sh2_write32(sh2->r[15], sh2->sr, sh2->is_slave); /* push SR onto stack */
p32x_sh2_write32(sh2->r[15], sh2->sr, sh2); /* push SR onto stack */
sh2->r[15] -= 4;
p32x_sh2_write32(sh2->r[15], sh2->pc, sh2->is_slave); /* push PC onto stack */
p32x_sh2_write32(sh2->r[15], sh2->pc, sh2); /* push PC onto stack */
/* set I flags in SR */
sh2->sr = (sh2->sr & ~I) | (level << 4);
/* fetch PC */
sh2->pc = p32x_sh2_read32(sh2->vbr + vector * 4, sh2->is_slave);
sh2->pc = p32x_sh2_read32(sh2->vbr + vector * 4, sh2);
/* 13 cycles at best */
sh2->cycles_done += 13;