[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;

	memset(sh2, 0, offsetof(SH2, mult_m68k_to_sh2));
	sh2->is_slave = is_slave;
	sh2->other_sh2 = other_sh2;
	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 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;

	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
cff531af	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	*/
41397701	8	#include <string.h>
b4db550e	9	#include <stddef.h>
b4db550e	10
41397701	11	#include "sh2.h"
5686d931	12	#include "../debug.h"
679af8a3	13	#include "compiler.h"
41397701	14
	15	#define I 0xf0
	16
f81107f5	17	int sh2_init(SH2 sh2, int is_slave, SH2 other_sh2)
41397701	18	{
679af8a3	19	int ret = 0;
679af8a3	20
ed4402a7	21	memset(sh2, 0, offsetof(SH2, mult_m68k_to_sh2));
41397701	22	sh2->is_slave = is_slave;
f81107f5	23	sh2->other_sh2 = other_sh2;
5686d931	24	pdb_register_cpu(sh2, PDBCT_SH2, is_slave ? "ssh2" : "msh2");
679af8a3	25	#ifdef DRC_SH2
	26	ret = sh2_drc_init(sh2);
	27	#endif
	28	return ret;
41397701	29	}
41397701	30
e898de13	31	void sh2_finish(SH2 *sh2)
	32	{
	33	#ifdef DRC_SH2
	34	sh2_drc_finish(sh2);
	35	#endif
	36	}
	37
41397701	38	void sh2_reset(SH2 *sh2)
41397701	39	{
bcf65fd6	40	sh2->pc = p32x_sh2_read32(0, sh2);
bcf65fd6	41	sh2->r[15] = p32x_sh2_read32(4, sh2);
41397701	42	sh2->sr = I;
	43	sh2->vbr = 0;
	44	sh2->pending_int_irq = 0;
	45	}
	46
6add7875	47	void sh2_do_irq(SH2 *sh2, int level, int vector)
41397701	48	{
8cc76b48	49	sh2->sr &= 0x3f3;
8cc76b48	50
41397701	51	sh2->r[15] -= 4;
bcf65fd6	52	p32x_sh2_write32(sh2->r[15], sh2->sr, sh2); /* push SR onto stack */
41397701	53	sh2->r[15] -= 4;
bcf65fd6	54	p32x_sh2_write32(sh2->r[15], sh2->pc, sh2); /* push PC onto stack */
41397701	55
	56	/* set I flags in SR */
	57	sh2->sr = (sh2->sr & ~I) \| (level << 4);
	58
	59	/* fetch PC */
bcf65fd6	60	sh2->pc = p32x_sh2_read32(sh2->vbr + vector * 4, sh2);
41397701	61
41397701	62	/* 13 cycles at best */
00faec9c	63	sh2->icount -= 13;
41397701	64	}
41397701	65
a8fd6e37	66	int sh2_irl_irq(SH2 *sh2, int level, int nested_call)
41397701	67	{
a8fd6e37	68	int taken;
a8fd6e37	69
41397701	70	sh2->pending_irl = level;
1f1ff763	71	if (level < sh2->pending_int_irq)
	72	level = sh2->pending_int_irq;
	73	sh2->pending_level = level;
41397701	74
a8fd6e37	75	taken = (level > ((sh2->sr >> 4) & 0x0f));
	76	if (taken) {
	77	if (!nested_call) {
	78	// not in memhandler, so handle this now (recompiler friendly)
	79	// do this to avoid missing irqs that other SH2 might clear
1f1ff763	80	int vector = sh2->irq_callback(sh2, level);
1f1ff763	81	sh2_do_irq(sh2, level, vector);
00faec9c	82	sh2->m68krcycles_done += C_SH2_TO_M68K(*sh2, 13);
1f1ff763	83	}
a8fd6e37	84	else
a8fd6e37	85	sh2->test_irq = 1;
1f1ff763	86	}
a8fd6e37	87	return taken;
41397701	88	}
	89
	90	void sh2_internal_irq(SH2 *sh2, int level, int vector)
	91	{
6add7875	92	// FIXME: multiple internal irqs not handled..
6add7875	93	// assuming internal irqs never clear until accepted
41397701	94	sh2->pending_int_irq = level;
41397701	95	sh2->pending_int_vector = vector;
6add7875	96	if (level > sh2->pending_level)
6add7875	97	sh2->pending_level = level;
41397701	98
6add7875	99	sh2->test_irq = 1;
41397701	100	}
41397701	101
b4db550e	102	#define SH2_REG_SIZE (offsetof(SH2, macl) + sizeof(sh2->macl))
	103
	104	void sh2_pack(const SH2 sh2, unsigned char buff)
	105	{
	106	unsigned int *p;
	107
	108	memcpy(buff, sh2, SH2_REG_SIZE);
	109	p = (void *)(buff + SH2_REG_SIZE);
	110
	111	p[0] = sh2->pending_int_irq;
	112	p[1] = sh2->pending_int_vector;
b4db550e	113	}
	114
	115	void sh2_unpack(SH2 sh2, const unsigned char buff)
	116	{
	117	unsigned int *p;
	118
	119	memcpy(sh2, buff, SH2_REG_SIZE);
	120	p = (void *)(buff + SH2_REG_SIZE);
	121
	122	sh2->pending_int_irq = p[0];
	123	sh2->pending_int_vector = p[1];
27e26273	124	sh2->test_irq = 1;
b4db550e	125	}
b4db550e	126
00faec9c	127	#ifdef DRC_CMP
	128
	129	/* trace/compare */
	130	#include <stdio.h>
	131	#include <stdlib.h>
	132	#include <pico/memory.h>
6d797957	133	#undef _USE_CZ80 // HACK
6d797957	134	#include <pico/pico_int.h>
8cc76b48	135	#include <pico/debug.h>
00faec9c	136
00faec9c	137	static SH2 sh2ref[2];
00faec9c	138	static unsigned int mem_val;
6d797957	139
00faec9c	140	static unsigned int local_read32(SH2 *sh2, u32 a)
	141	{
	142	const sh2_memmap *sh2_map = sh2->read16_map;
6d797957	143	u16 *pd;
00faec9c	144	uptr p;
00faec9c	145
f81107f5	146	sh2_map += (a >> 25);
00faec9c	147	p = sh2_map->addr;
00faec9c	148	if (!map_flag_set(p)) {
6d797957	149	pd = (u16 *)((p << 1) + ((a & sh2_map->mask) & ~1));
	150	return (pd[0] << 16) \| pd[1];
	151	}
	152
	153	if ((a & 0xfffff000) == 0xc0000000) {
	154	// data array
f81107f5	155	pd = (u16 *)sh2->data_array + (a & 0xfff) / 2;
6d797957	156	return (pd[0] << 16) \| pd[1];
	157	}
	158	if ((a & 0xdfffffc0) == 0x4000) {
	159	pd = &Pico32x.regs[(a & 0x3f) / 2];
	160	return (pd[0] << 16) \| pd[1];
	161	}
	162	if ((a & 0xdffffe00) == 0x4200) {
	163	pd = &Pico32xMem->pal[(a & 0x1ff) / 2];
00faec9c	164	return (pd[0] << 16) \| pd[1];
	165	}
	166
	167	return 0;
	168	}
	169
00faec9c	170	void do_sh2_trace(SH2 *current, int cycles)
00faec9c	171	{
6d797957	172	static int current_slave = -1;
6d797957	173	static u32 current_m68k_pc;
00faec9c	174	SH2 *sh2o = &sh2ref[current->is_slave];
	175	u32 regs_a = (void )current;
	176	u32 regs_o = (void )sh2o;
	177	unsigned char v;
	178	u32 val;
	179	int i;
	180
6d797957	181	if (SekPc != current_m68k_pc) {
6d797957	182	current_m68k_pc = SekPc;
12da51c2	183	tl_write_uint(CTL_M68KPC, current_m68k_pc);
6d797957	184	}
6d797957	185
00faec9c	186	if (current->is_slave != current_slave) {
00faec9c	187	current_slave = current->is_slave;
6d797957	188	v = CTL_MASTERSLAVE \| current->is_slave;
12da51c2	189	tl_write(&v, sizeof(v));
00faec9c	190	}
	191
	192	for (i = 0; i < offsetof(SH2, read8_map) / 4; i++) {
	193	if (i == 17) // ppc
	194	continue;
	195	if (regs_a[i] != regs_o[i]) {
12da51c2	196	tl_write_uint(CTL_SH2_R + i, regs_a[i]);
00faec9c	197	regs_o[i] = regs_a[i];
	198	}
	199	}
	200
	201	if (current->ea != sh2o->ea) {
12da51c2	202	tl_write_uint(CTL_EA, current->ea);
00faec9c	203	sh2o->ea = current->ea;
	204	}
	205	val = local_read32(current, current->ea);
	206	if (mem_val != val) {
12da51c2	207	tl_write_uint(CTL_EAVAL, val);
00faec9c	208	mem_val = val;
00faec9c	209	}
12da51c2	210	tl_write_uint(CTL_CYCLES, cycles);
00faec9c	211	}
	212
	213	static const char *regnames[] = {
	214	"r0", "r1", "r2", "r3",
	215	"r4", "r5", "r6", "r7",
	216	"r8", "r9", "r10", "r11",
	217	"r12", "r13", "r14", "r15",
	218	"pc", "ppc", "pr", "sr",
	219	"gbr", "vbr", "mach","macl",
	220	};
	221
6d797957	222	static void dump_regs(SH2 *sh2)
	223	{
	224	char csh2;
	225	int i;
	226
	227	csh2 = sh2->is_slave ? 's' : 'm';
	228	for (i = 0; i < 16/2; i++)
	229	printf("%csh2 r%d: %08x r%02d: %08x\n", csh2,
	230	i, sh2->r[i], i+8, sh2->r[i+8]);
	231	printf("%csh2 PC: %08x , %08x\n", csh2, sh2->pc, sh2->ppc);
	232	printf("%csh2 SR: %03x PR: %08x\n", csh2, sh2->sr, sh2->pr);
	233	}
	234
00faec9c	235	void do_sh2_cmp(SH2 *current)
	236	{
	237	static int current_slave;
	238	static u32 current_val;
	239	SH2 *sh2o = &sh2ref[current->is_slave];
	240	u32 regs_a = (void )current;
	241	u32 regs_o = (void )sh2o;
	242	unsigned char code;
	243	int cycles_o = 666;
	244	u32 sr, val;
	245	int bad = 0;
	246	int cycles;
	247	int i, ret;
00faec9c	248
12da51c2	249	sh2ref[1].is_slave = 1;
00faec9c	250
00faec9c	251	while (1) {
12da51c2	252	ret = tl_read(&code, 1);
00faec9c	253	if (ret <= 0)
00faec9c	254	break;
6d797957	255	if (code == CTL_CYCLES) {
12da51c2	256	tl_read(&cycles_o, 4);
00faec9c	257	break;
	258	}
	259
	260	switch (code) {
6d797957	261	case CTL_MASTERSLAVE:
6d797957	262	case CTL_MASTERSLAVE + 1:
00faec9c	263	current_slave = code & 1;
00faec9c	264	break;
6d797957	265	case CTL_EA:
12da51c2	266	tl_read_uint(&sh2o->ea);
00faec9c	267	break;
6d797957	268	case CTL_EAVAL:
12da51c2	269	tl_read_uint(&current_val);
00faec9c	270	break;
6d797957	271	case CTL_M68KPC:
12da51c2	272	tl_read_uint(&val);
6d797957	273	if (SekPc != val) {
	274	printf("m68k: %08x %08x\n", SekPc, val);
	275	bad = 1;
	276	}
	277	break;
00faec9c	278	default:
12da51c2	279	if (CTL_SH2_R <= code && code < CTL_SH2_R +
	280	offsetof(SH2, read8_map) / 4)
	281	{
	282	tl_read_uint(regs_o + code - CTL_SH2_R);
	283	}
	284	else
	285	{
	286	printf("wrong code: %02x\n", code);
00faec9c	287	goto end;
	288	}
	289	break;
	290	}
	291	}
	292
	293	if (ret <= 0) {
	294	printf("EOF?\n");
	295	goto end;
	296	}
	297
	298	if (current->is_slave != current_slave) {
	299	printf("bad slave: %d %d\n", current->is_slave,
	300	current_slave);
	301	bad = 1;
	302	}
	303
	304	for (i = 0; i < offsetof(SH2, read8_map) / 4; i++) {
	305	if (i == 17 \|\| i == 19) // ppc, sr
	306	continue;
	307	if (regs_a[i] != regs_o[i]) {
	308	printf("bad %4s: %08x %08x\n",
	309	regnames[i], regs_a[i], regs_o[i]);
	310	bad = 1;
	311	}
	312	}
	313
	314	sr = current->sr & 0x3f3;
	315	cycles = (signed int)current->sr >> 12;
	316
	317	if (sr != sh2o->sr) {
	318	printf("bad SR: %03x %03x\n", sr, sh2o->sr);
	319	bad = 1;
	320	}
	321
	322	if (cycles != cycles_o) {
	323	printf("bad cycles: %d %d\n", cycles, cycles_o);
	324	bad = 1;
	325	}
	326
	327	val = local_read32(current, sh2o->ea);
	328	if (val != current_val) {
	329	printf("bad val @%08x: %08x %08x\n", sh2o->ea, val, current_val);
	330	bad = 1;
	331	}
	332
	333	if (!bad) {
	334	sh2o->ppc = current->pc;
	335	return;
	336	}
	337
	338	end:
	339	printf("--\n");
6d797957	340	dump_regs(sh2o);
	341	if (current->is_slave != current_slave)
	342	dump_regs(&sh2ref[current->is_slave ^ 1]);
8cc76b48	343	PDebugDumpMem();
00faec9c	344	exit(1);
	345	}
	346
	347	#endif // DRC_CMP