6 void sh2_init(SH2 *sh2, int is_slave)
8 memset(sh2, 0, sizeof(*sh2));
9 sh2->is_slave = is_slave;
12 void sh2_reset(SH2 *sh2)
14 sh2->pc = p32x_sh2_read32(0, sh2->is_slave);
15 sh2->r[15] = p32x_sh2_read32(4, sh2->is_slave);
18 sh2->pending_int_irq = 0;
21 static void sh2_do_irq(SH2 *sh2, int level, int vector)
23 sh2->irq_callback(sh2->is_slave, level);
26 p32x_sh2_write32(sh2->r[15], sh2->sr, sh2->is_slave); /* push SR onto stack */
28 p32x_sh2_write32(sh2->r[15], sh2->pc, sh2->is_slave); /* push PC onto stack */
30 /* set I flags in SR */
31 sh2->sr = (sh2->sr & ~I) | (level << 4);
34 sh2->pc = p32x_sh2_read32(sh2->vbr + vector * 4, sh2->is_slave);
36 /* 13 cycles at best */
37 sh2->cycles_done += 13;
41 void sh2_irl_irq(SH2 *sh2, int level)
43 sh2->pending_irl = level;
44 if (level <= ((sh2->sr >> 4) & 0x0f))
47 sh2_do_irq(sh2, level, 64 + level/2);
50 void sh2_internal_irq(SH2 *sh2, int level, int vector)
52 sh2->pending_int_irq = level;
53 sh2->pending_int_vector = vector;
54 if (level <= ((sh2->sr >> 4) & 0x0f))
57 sh2_do_irq(sh2, level, vector);
58 sh2->pending_int_irq = 0; // auto-clear