5 * This work is licensed under the terms of MAME license.
6 * See COPYING file in the top-level directory.
17 int sh2_init(SH2 *sh2, int is_slave)
21 memset(sh2, 0, offsetof(SH2, mult_m68k_to_sh2));
22 sh2->is_slave = is_slave;
23 pdb_register_cpu(sh2, PDBCT_SH2, is_slave ? "ssh2" : "msh2");
25 ret = sh2_drc_init(sh2);
30 void sh2_finish(SH2 *sh2)
37 void sh2_reset(SH2 *sh2)
39 sh2->pc = p32x_sh2_read32(0, sh2);
40 sh2->r[15] = p32x_sh2_read32(4, sh2);
43 sh2->pending_int_irq = 0;
46 void sh2_do_irq(SH2 *sh2, int level, int vector)
49 p32x_sh2_write32(sh2->r[15], sh2->sr, sh2); /* push SR onto stack */
51 p32x_sh2_write32(sh2->r[15], sh2->pc, sh2); /* push PC onto stack */
53 /* set I flags in SR */
54 sh2->sr = (sh2->sr & ~I) | (level << 4);
57 sh2->pc = p32x_sh2_read32(sh2->vbr + vector * 4, sh2);
59 /* 13 cycles at best */
60 sh2->m68krcycles_done += C_SH2_TO_M68K(*sh2, 13);
64 int sh2_irl_irq(SH2 *sh2, int level, int nested_call)
68 sh2->pending_irl = level;
69 if (level < sh2->pending_int_irq)
70 level = sh2->pending_int_irq;
71 sh2->pending_level = level;
73 taken = (level > ((sh2->sr >> 4) & 0x0f));
76 // not in memhandler, so handle this now (recompiler friendly)
77 // do this to avoid missing irqs that other SH2 might clear
78 int vector = sh2->irq_callback(sh2, level);
79 sh2_do_irq(sh2, level, vector);
87 void sh2_internal_irq(SH2 *sh2, int level, int vector)
89 // FIXME: multiple internal irqs not handled..
90 // assuming internal irqs never clear until accepted
91 sh2->pending_int_irq = level;
92 sh2->pending_int_vector = vector;
93 if (level > sh2->pending_level)
94 sh2->pending_level = level;
99 #define SH2_REG_SIZE (offsetof(SH2, macl) + sizeof(sh2->macl))
101 void sh2_pack(const SH2 *sh2, unsigned char *buff)
105 memcpy(buff, sh2, SH2_REG_SIZE);
106 p = (void *)(buff + SH2_REG_SIZE);
108 p[0] = sh2->pending_int_irq;
109 p[1] = sh2->pending_int_vector;
112 void sh2_unpack(SH2 *sh2, const unsigned char *buff)
116 memcpy(sh2, buff, SH2_REG_SIZE);
117 p = (void *)(buff + SH2_REG_SIZE);
119 sh2->pending_int_irq = p[0];
120 sh2->pending_int_vector = p[1];