[picodrive.git] / cpu / sh2 / sh2.c

/*
 * PicoDrive
 * (C) notaz, 2009,2010
 *
 * This work is licensed under the terms of MAME license.
 * See COPYING file in the top-level directory.
 */
#include <string.h>
#include <stddef.h>

#include "sh2.h"
#include "../debug.h"
#include "compiler.h"

#define I 0xf0

int sh2_init(SH2 *sh2, int is_slave, SH2 *other_sh2)
{
	int ret = 0;
	unsigned int mult_m68k_to_sh2 = sh2->mult_m68k_to_sh2;
	unsigned int mult_sh2_to_m68k = sh2->mult_sh2_to_m68k;

	memset(sh2, 0, sizeof(*sh2));
	sh2->is_slave = is_slave;
	sh2->other_sh2 = other_sh2;
	sh2->mult_m68k_to_sh2 = mult_m68k_to_sh2;
	sh2->mult_sh2_to_m68k = mult_sh2_to_m68k;

	pdb_register_cpu(sh2, PDBCT_SH2, is_slave ? "ssh2" : "msh2");
#ifdef DRC_SH2
	ret = sh2_drc_init(sh2);
#endif
	return ret;
}

void sh2_finish(SH2 *sh2)
{
#ifdef DRC_SH2
	sh2_drc_finish(sh2);
#endif
}

void sh2_reset(SH2 *sh2)
{
	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;
}

void sh2_do_irq(SH2 *sh2, int level, int vector)
{
	sh2->sr &= 0x3f3;

	sh2->r[15] -= 4;
	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);	/* 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);

	/* 13 cycles at best */
	sh2->icount -= 13;
}

int sh2_irl_irq(SH2 *sh2, int level, int nested_call)
{
	int taken;

	sh2->pending_irl = level;
	if (level < sh2->pending_int_irq)
		level = sh2->pending_int_irq;
	sh2->pending_level = level;

	taken = (level > ((sh2->sr >> 4) & 0x0f));
	if (taken) {
		if (!nested_call) {
			// not in memhandler, so handle this now (recompiler friendly)
			// do this to avoid missing irqs that other SH2 might clear
			int vector = sh2->irq_callback(sh2, level);
			sh2_do_irq(sh2, level, vector);
			sh2->m68krcycles_done += C_SH2_TO_M68K(*sh2, 13);
		}
		else
			sh2->test_irq = 1;
	}
	return taken;
}

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->pending_level)
		sh2->pending_level = level;

	sh2->test_irq = 1;
}

#define SH2_REG_SIZE (offsetof(SH2, macl) + sizeof(sh2->macl))

void sh2_pack(const SH2 *sh2, unsigned char *buff)
{
	unsigned int *p;

	memcpy(buff, sh2, SH2_REG_SIZE);
	p = (void *)(buff + SH2_REG_SIZE);

	p[0] = sh2->pending_int_irq;
	p[1] = sh2->pending_int_vector;
}

void sh2_unpack(SH2 *sh2, const unsigned char *buff)
{
	unsigned int *p;

	memcpy(sh2, buff, SH2_REG_SIZE);
	p = (void *)(buff + SH2_REG_SIZE);

	sh2->pending_int_irq = p[0];
	sh2->pending_int_vector = p[1];
	sh2->test_irq = 1;
}

#ifdef DRC_CMP

/* trace/compare */
#include <stdio.h>
#include <stdlib.h>
#include <pico/memory.h>
#undef _USE_CZ80 // HACK
#include <pico/pico_int.h>
#include <pico/debug.h>

static SH2 sh2ref[2];
static unsigned int mem_val;

static unsigned int local_read32(SH2 *sh2, u32 a)
{
	const sh2_memmap *sh2_map = sh2->read16_map;
	u16 *pd;
	uptr p;

	sh2_map += (a >> 25);
	p = sh2_map->addr;
	if (!map_flag_set(p)) {
		pd = (u16 *)((p << 1) + ((a & sh2_map->mask) & ~1));
		return (pd[0] << 16) | pd[1];
	}

	if ((a & 0xfffff000) == 0xc0000000) {
		// data array
		pd = (u16 *)sh2->data_array + (a & 0xfff) / 2;
		return (pd[0] << 16) | pd[1];
	}
	if ((a & 0xdfffffc0) == 0x4000) {
		pd = &Pico32x.regs[(a & 0x3f) / 2];
		return (pd[0] << 16) | pd[1];
	}
	if ((a & 0xdffffe00) == 0x4200) {
		pd = &Pico32xMem->pal[(a & 0x1ff) / 2];
		return (pd[0] << 16) | pd[1];
	}

	return 0;
}

void do_sh2_trace(SH2 *current, int cycles)
{
	static int current_slave = -1;
	static u32 current_m68k_pc;
	SH2 *sh2o = &sh2ref[current->is_slave];
	u32 *regs_a = (void *)current;
	u32 *regs_o = (void *)sh2o;
	unsigned char v;
	u32 val;
	int i;

	if (SekPc != current_m68k_pc) {
		current_m68k_pc = SekPc;
		tl_write_uint(CTL_M68KPC, current_m68k_pc);
	}

	if (current->is_slave != current_slave) {
		current_slave = current->is_slave;
		v = CTL_MASTERSLAVE | current->is_slave;
		tl_write(&v, sizeof(v));
	}

	for (i = 0; i < offsetof(SH2, read8_map) / 4; i++) {
		if (i == 17) // ppc
			continue;
		if (regs_a[i] != regs_o[i]) {
			tl_write_uint(CTL_SH2_R + i, regs_a[i]);
			regs_o[i] = regs_a[i];
		}
	}

	if (current->ea != sh2o->ea) {
		tl_write_uint(CTL_EA, current->ea);
		sh2o->ea = current->ea;
	}
	val = local_read32(current, current->ea);
	if (mem_val != val) {
		tl_write_uint(CTL_EAVAL, val);
		mem_val = val;
	}
	tl_write_uint(CTL_CYCLES, cycles);
}

static const char *regnames[] = {
	"r0",  "r1",  "r2",  "r3",
	"r4",  "r5",  "r6",  "r7",
	"r8",  "r9",  "r10", "r11",
	"r12", "r13", "r14", "r15",
	"pc",  "ppc", "pr",  "sr",
	"gbr", "vbr", "mach","macl",
};

static void dump_regs(SH2 *sh2)
{
	char csh2;
	int i;

	csh2 = sh2->is_slave ? 's' : 'm';
	for (i = 0; i < 16/2; i++)
		printf("%csh2 r%d: %08x r%02d: %08x\n", csh2,
			i, sh2->r[i], i+8, sh2->r[i+8]);
	printf("%csh2 PC: %08x  ,   %08x\n", csh2, sh2->pc, sh2->ppc);
	printf("%csh2 SR:      %03x  PR: %08x\n", csh2, sh2->sr, sh2->pr);
}

void REGPARM(1) do_sh2_cmp(SH2 *current)
{
	static int current_slave;
	static u32 current_val;
	SH2 *sh2o = &sh2ref[current->is_slave];
	u32 *regs_a = (void *)current;
	u32 *regs_o = (void *)sh2o;
	unsigned char code;
	int cycles_o = 666;
	u32 sr, val;
	int bad = 0;
	int cycles;
	int i, ret;

#if 0
	sr = current->sr;
	current->sr &= 0x3f3;
	do_sh2_trace(current, (signed int)sr >> 12);
	current->sr = sr;
	return;
#endif
	sh2ref[1].is_slave = 1;

	while (1) {
		ret = tl_read(&code, 1);
		if (ret <= 0)
			break;
		if (code == CTL_CYCLES) {
			tl_read(&cycles_o, 4);
			break;
		}

		switch (code) {
		case CTL_MASTERSLAVE:
		case CTL_MASTERSLAVE + 1:
			current_slave = code & 1;
			break;
		case CTL_EA:
			tl_read_uint(&sh2o->ea);
			break;
		case CTL_EAVAL:
			tl_read_uint(&current_val);
			break;
		case CTL_M68KPC:
			tl_read_uint(&val);
			if (SekPc != val) {
				printf("m68k: %08x %08x\n", SekPc, val);
				bad = 1;
			}
			break;
		default:
			if (CTL_SH2_R <= code && code < CTL_SH2_R +
			    offsetof(SH2, read8_map) / 4)
			{
				tl_read_uint(regs_o + code - CTL_SH2_R);
			}
			else
			{
				printf("wrong code: %02x\n", code);
				goto end;
			}
			break;
		}
	}

	if (ret <= 0) {
		printf("EOF?\n");
		goto end;
	}

	if (current->is_slave != current_slave) {
		printf("bad slave: %d %d\n", current->is_slave,
			current_slave);
		bad = 1;
	}

	for (i = 0; i < offsetof(SH2, read8_map) / 4; i++) {
		if (i == 17 || i == 19) // ppc, sr
			continue;
		if (regs_a[i] != regs_o[i]) {
			printf("bad %4s: %08x %08x\n",
				regnames[i], regs_a[i], regs_o[i]);
			bad = 1;
		}
	}

	sr = current->sr & 0x3f3;
	cycles = (signed int)current->sr >> 12;

	if (sr != sh2o->sr) {
		printf("bad SR:  %03x %03x\n", sr, sh2o->sr);
		bad = 1;
	}

	if (cycles != cycles_o) {
		printf("bad cycles: %d %d\n", cycles, cycles_o);
		bad = 1;
	}

	val = local_read32(current, sh2o->ea);
	if (val != current_val) {
		printf("bad val @%08x: %08x %08x\n", sh2o->ea, val, current_val);
		bad = 1;
	}

	if (!bad) {
		sh2o->ppc = current->pc;
		return;
	}

end:
	printf("--\n");
	dump_regs(sh2o);
	if (current->is_slave != current_slave)
		dump_regs(&sh2ref[current->is_slave ^ 1]);
	PDebugDumpMem();
	exit(1);
}

#endif // DRC_CMP
Commit	Line	Data
	1	/*
	2	* PicoDrive
	3	* (C) notaz, 2009,2010
	4	*
	5	* This work is licensed under the terms of MAME license.
	6	* See COPYING file in the top-level directory.
	7	*/
	8	#include <string.h>
	9	#include <stddef.h>
	10
	11	#include "sh2.h"
	12	#include "../debug.h"
	13	#include "compiler.h"
	14
	15	#define I 0xf0
	16
	17	int sh2_init(SH2 sh2, int is_slave, SH2 other_sh2)
	18	{
	19	int ret = 0;
	20	unsigned int mult_m68k_to_sh2 = sh2->mult_m68k_to_sh2;
	21	unsigned int mult_sh2_to_m68k = sh2->mult_sh2_to_m68k;
	22
	23	memset(sh2, 0, sizeof(*sh2));
	24	sh2->is_slave = is_slave;
	25	sh2->other_sh2 = other_sh2;
	26	sh2->mult_m68k_to_sh2 = mult_m68k_to_sh2;
	27	sh2->mult_sh2_to_m68k = mult_sh2_to_m68k;
	28
	29	pdb_register_cpu(sh2, PDBCT_SH2, is_slave ? "ssh2" : "msh2");
	30	#ifdef DRC_SH2
	31	ret = sh2_drc_init(sh2);
	32	#endif
	33	return ret;
	34	}
	35
	36	void sh2_finish(SH2 *sh2)
	37	{
	38	#ifdef DRC_SH2
	39	sh2_drc_finish(sh2);
	40	#endif
	41	}
	42
	43	void sh2_reset(SH2 *sh2)
	44	{
	45	sh2->pc = p32x_sh2_read32(0, sh2);
	46	sh2->r[15] = p32x_sh2_read32(4, sh2);
	47	sh2->sr = I;
	48	sh2->vbr = 0;
	49	sh2->pending_int_irq = 0;
	50	}
	51
	52	void sh2_do_irq(SH2 *sh2, int level, int vector)
	53	{
	54	sh2->sr &= 0x3f3;
	55
	56	sh2->r[15] -= 4;
	57	p32x_sh2_write32(sh2->r[15], sh2->sr, sh2); /* push SR onto stack */
	58	sh2->r[15] -= 4;
	59	p32x_sh2_write32(sh2->r[15], sh2->pc, sh2); /* push PC onto stack */
	60
	61	/* set I flags in SR */
	62	sh2->sr = (sh2->sr & ~I) \| (level << 4);
	63
	64	/* fetch PC */
	65	sh2->pc = p32x_sh2_read32(sh2->vbr + vector * 4, sh2);
	66
	67	/* 13 cycles at best */
	68	sh2->icount -= 13;
	69	}
	70
	71	int sh2_irl_irq(SH2 *sh2, int level, int nested_call)
	72	{
	73	int taken;
	74
	75	sh2->pending_irl = level;
	76	if (level < sh2->pending_int_irq)
	77	level = sh2->pending_int_irq;
	78	sh2->pending_level = level;
	79
	80	taken = (level > ((sh2->sr >> 4) & 0x0f));
	81	if (taken) {
	82	if (!nested_call) {
	83	// not in memhandler, so handle this now (recompiler friendly)
	84	// do this to avoid missing irqs that other SH2 might clear
	85	int vector = sh2->irq_callback(sh2, level);
	86	sh2_do_irq(sh2, level, vector);
	87	sh2->m68krcycles_done += C_SH2_TO_M68K(*sh2, 13);
	88	}
	89	else
	90	sh2->test_irq = 1;
	91	}
	92	return taken;
	93	}
	94
	95	void sh2_internal_irq(SH2 *sh2, int level, int vector)
	96	{
	97	// FIXME: multiple internal irqs not handled..
	98	// assuming internal irqs never clear until accepted
	99	sh2->pending_int_irq = level;
	100	sh2->pending_int_vector = vector;
	101	if (level > sh2->pending_level)
	102	sh2->pending_level = level;
	103
	104	sh2->test_irq = 1;
	105	}
	106
	107	#define SH2_REG_SIZE (offsetof(SH2, macl) + sizeof(sh2->macl))
	108
	109	void sh2_pack(const SH2 sh2, unsigned char buff)
	110	{
	111	unsigned int *p;
	112
	113	memcpy(buff, sh2, SH2_REG_SIZE);
	114	p = (void *)(buff + SH2_REG_SIZE);
	115
	116	p[0] = sh2->pending_int_irq;
	117	p[1] = sh2->pending_int_vector;
	118	}
	119
	120	void sh2_unpack(SH2 sh2, const unsigned char buff)
	121	{
	122	unsigned int *p;
	123
	124	memcpy(sh2, buff, SH2_REG_SIZE);
	125	p = (void *)(buff + SH2_REG_SIZE);
	126
	127	sh2->pending_int_irq = p[0];
	128	sh2->pending_int_vector = p[1];
	129	sh2->test_irq = 1;
	130	}
	131
	132	#ifdef DRC_CMP
	133
	134	/* trace/compare */
	135	#include <stdio.h>
	136	#include <stdlib.h>
	137	#include <pico/memory.h>
	138	#undef _USE_CZ80 // HACK
	139	#include <pico/pico_int.h>
	140	#include <pico/debug.h>
	141
	142	static SH2 sh2ref[2];
	143	static unsigned int mem_val;
	144
	145	static unsigned int local_read32(SH2 *sh2, u32 a)
	146	{
	147	const sh2_memmap *sh2_map = sh2->read16_map;
	148	u16 *pd;
	149	uptr p;
	150
	151	sh2_map += (a >> 25);
	152	p = sh2_map->addr;
	153	if (!map_flag_set(p)) {
	154	pd = (u16 *)((p << 1) + ((a & sh2_map->mask) & ~1));
	155	return (pd[0] << 16) \| pd[1];
	156	}
	157
	158	if ((a & 0xfffff000) == 0xc0000000) {
	159	// data array
	160	pd = (u16 *)sh2->data_array + (a & 0xfff) / 2;
	161	return (pd[0] << 16) \| pd[1];
	162	}
	163	if ((a & 0xdfffffc0) == 0x4000) {
	164	pd = &Pico32x.regs[(a & 0x3f) / 2];
	165	return (pd[0] << 16) \| pd[1];
	166	}
	167	if ((a & 0xdffffe00) == 0x4200) {
	168	pd = &Pico32xMem->pal[(a & 0x1ff) / 2];
	169	return (pd[0] << 16) \| pd[1];
	170	}
	171
	172	return 0;
	173	}
	174
	175	void do_sh2_trace(SH2 *current, int cycles)
	176	{
	177	static int current_slave = -1;
	178	static u32 current_m68k_pc;
	179	SH2 *sh2o = &sh2ref[current->is_slave];
	180	u32 regs_a = (void )current;
	181	u32 regs_o = (void )sh2o;
	182	unsigned char v;
	183	u32 val;
	184	int i;
	185
	186	if (SekPc != current_m68k_pc) {
	187	current_m68k_pc = SekPc;
	188	tl_write_uint(CTL_M68KPC, current_m68k_pc);
	189	}
	190
	191	if (current->is_slave != current_slave) {
	192	current_slave = current->is_slave;
	193	v = CTL_MASTERSLAVE \| current->is_slave;
	194	tl_write(&v, sizeof(v));
	195	}
	196
	197	for (i = 0; i < offsetof(SH2, read8_map) / 4; i++) {
	198	if (i == 17) // ppc
	199	continue;
	200	if (regs_a[i] != regs_o[i]) {
	201	tl_write_uint(CTL_SH2_R + i, regs_a[i]);
	202	regs_o[i] = regs_a[i];
	203	}
	204	}
	205
	206	if (current->ea != sh2o->ea) {
	207	tl_write_uint(CTL_EA, current->ea);
	208	sh2o->ea = current->ea;
	209	}
	210	val = local_read32(current, current->ea);
	211	if (mem_val != val) {
	212	tl_write_uint(CTL_EAVAL, val);
	213	mem_val = val;
	214	}
	215	tl_write_uint(CTL_CYCLES, cycles);
	216	}
	217
	218	static const char *regnames[] = {
	219	"r0", "r1", "r2", "r3",
	220	"r4", "r5", "r6", "r7",
	221	"r8", "r9", "r10", "r11",
	222	"r12", "r13", "r14", "r15",
	223	"pc", "ppc", "pr", "sr",
	224	"gbr", "vbr", "mach","macl",
	225	};
	226
	227	static void dump_regs(SH2 *sh2)
	228	{
	229	char csh2;
	230	int i;
	231
	232	csh2 = sh2->is_slave ? 's' : 'm';
	233	for (i = 0; i < 16/2; i++)
	234	printf("%csh2 r%d: %08x r%02d: %08x\n", csh2,
	235	i, sh2->r[i], i+8, sh2->r[i+8]);
	236	printf("%csh2 PC: %08x , %08x\n", csh2, sh2->pc, sh2->ppc);
	237	printf("%csh2 SR: %03x PR: %08x\n", csh2, sh2->sr, sh2->pr);
	238	}
	239
	240	void REGPARM(1) do_sh2_cmp(SH2 *current)
	241	{
	242	static int current_slave;
	243	static u32 current_val;
	244	SH2 *sh2o = &sh2ref[current->is_slave];
	245	u32 regs_a = (void )current;
	246	u32 regs_o = (void )sh2o;
	247	unsigned char code;
	248	int cycles_o = 666;
	249	u32 sr, val;
	250	int bad = 0;
	251	int cycles;
	252	int i, ret;
	253
	254	#if 0
	255	sr = current->sr;
	256	current->sr &= 0x3f3;
	257	do_sh2_trace(current, (signed int)sr >> 12);
	258	current->sr = sr;
	259	return;
	260	#endif
	261	sh2ref[1].is_slave = 1;
	262
	263	while (1) {
	264	ret = tl_read(&code, 1);
	265	if (ret <= 0)
	266	break;
	267	if (code == CTL_CYCLES) {
	268	tl_read(&cycles_o, 4);
	269	break;
	270	}
	271
	272	switch (code) {
	273	case CTL_MASTERSLAVE:
	274	case CTL_MASTERSLAVE + 1:
	275	current_slave = code & 1;
	276	break;
	277	case CTL_EA:
	278	tl_read_uint(&sh2o->ea);
	279	break;
	280	case CTL_EAVAL:
	281	tl_read_uint(&current_val);
	282	break;
	283	case CTL_M68KPC:
	284	tl_read_uint(&val);
	285	if (SekPc != val) {
	286	printf("m68k: %08x %08x\n", SekPc, val);
	287	bad = 1;
	288	}
	289	break;
	290	default:
	291	if (CTL_SH2_R <= code && code < CTL_SH2_R +
	292	offsetof(SH2, read8_map) / 4)
	293	{
	294	tl_read_uint(regs_o + code - CTL_SH2_R);
	295	}
	296	else
	297	{
	298	printf("wrong code: %02x\n", code);
	299	goto end;
	300	}
	301	break;
	302	}
	303	}
	304
	305	if (ret <= 0) {
	306	printf("EOF?\n");
	307	goto end;
	308	}
	309
	310	if (current->is_slave != current_slave) {
	311	printf("bad slave: %d %d\n", current->is_slave,
	312	current_slave);
	313	bad = 1;
	314	}
	315
	316	for (i = 0; i < offsetof(SH2, read8_map) / 4; i++) {
	317	if (i == 17 \|\| i == 19) // ppc, sr
	318	continue;
	319	if (regs_a[i] != regs_o[i]) {
	320	printf("bad %4s: %08x %08x\n",
	321	regnames[i], regs_a[i], regs_o[i]);
	322	bad = 1;
	323	}
	324	}
	325
	326	sr = current->sr & 0x3f3;
	327	cycles = (signed int)current->sr >> 12;
	328
	329	if (sr != sh2o->sr) {
	330	printf("bad SR: %03x %03x\n", sr, sh2o->sr);
	331	bad = 1;
	332	}
	333
	334	if (cycles != cycles_o) {
	335	printf("bad cycles: %d %d\n", cycles, cycles_o);
	336	bad = 1;
	337	}
	338
	339	val = local_read32(current, sh2o->ea);
	340	if (val != current_val) {
	341	printf("bad val @%08x: %08x %08x\n", sh2o->ea, val, current_val);
	342	bad = 1;
	343	}
	344
	345	if (!bad) {
	346	sh2o->ppc = current->pc;
	347	return;
	348	}
	349
	350	end:
	351	printf("--\n");
	352	dump_regs(sh2o);
	353	if (current->is_slave != current_slave)
	354	dump_regs(&sh2ref[current->is_slave ^ 1]);
	355	PDebugDumpMem();
	356	exit(1);
	357	}
	358
	359	#endif // DRC_CMP