[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 FILE *f;

enum ctl_byte {
	CTL_MASTERSLAVE = 0x80,
	CTL_EA = 0x82,
	CTL_EAVAL = 0x83,
	CTL_M68KPC = 0x84,
	CTL_CYCLES = 0x85,
};

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;
}

static void write_uint(unsigned char ctl, unsigned int v)
{
	fwrite(&ctl, 1, 1, f);
	fwrite(&v, sizeof(v), 1, f);
}

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 (f == NULL)
		f = fopen("tracelog", "wb");

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

	if (current->is_slave != current_slave) {
		current_slave = current->is_slave;
		v = CTL_MASTERSLAVE | current->is_slave;
		fwrite(&v, 1, 1, f);
	}

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

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

	if (f == NULL) {
		f = fopen("tracelog", "rb");
		sh2ref[1].is_slave = 1;
	}

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

		switch (code) {
		case CTL_MASTERSLAVE:
		case CTL_MASTERSLAVE + 1:
			current_slave = code & 1;
			break;
		case CTL_EA:
			fread(&sh2o->ea, 4, 1, f);
			break;
		case CTL_EAVAL:
			fread(&current_val, 4, 1, f);
			break;
		case CTL_M68KPC:
			fread(&val, 4, 1, f);
			if (SekPc != val) {
				printf("m68k: %08x %08x\n", SekPc, val);
				bad = 1;
			}
			break;
		default:
			if (code < offsetof(SH2, read8_map) / 4)
				fread(regs_o + code, 4, 1, f);
			else {
				printf("invalid 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;
	139	static FILE *f;
	140
6d797957	141	enum ctl_byte {
	142	CTL_MASTERSLAVE = 0x80,
	143	CTL_EA = 0x82,
	144	CTL_EAVAL = 0x83,
	145	CTL_M68KPC = 0x84,
	146	CTL_CYCLES = 0x85,
	147	};
	148
00faec9c	149	static unsigned int local_read32(SH2 *sh2, u32 a)
	150	{
	151	const sh2_memmap *sh2_map = sh2->read16_map;
6d797957	152	u16 *pd;
00faec9c	153	uptr p;
00faec9c	154
f81107f5	155	sh2_map += (a >> 25);
00faec9c	156	p = sh2_map->addr;
00faec9c	157	if (!map_flag_set(p)) {
6d797957	158	pd = (u16 *)((p << 1) + ((a & sh2_map->mask) & ~1));
	159	return (pd[0] << 16) \| pd[1];
	160	}
	161
	162	if ((a & 0xfffff000) == 0xc0000000) {
	163	// data array
f81107f5	164	pd = (u16 *)sh2->data_array + (a & 0xfff) / 2;
6d797957	165	return (pd[0] << 16) \| pd[1];
	166	}
	167	if ((a & 0xdfffffc0) == 0x4000) {
	168	pd = &Pico32x.regs[(a & 0x3f) / 2];
	169	return (pd[0] << 16) \| pd[1];
	170	}
	171	if ((a & 0xdffffe00) == 0x4200) {
	172	pd = &Pico32xMem->pal[(a & 0x1ff) / 2];
00faec9c	173	return (pd[0] << 16) \| pd[1];
	174	}
	175
	176	return 0;
	177	}
	178
	179	static void write_uint(unsigned char ctl, unsigned int v)
	180	{
	181	fwrite(&ctl, 1, 1, f);
	182	fwrite(&v, sizeof(v), 1, f);
	183	}
	184
	185	void do_sh2_trace(SH2 *current, int cycles)
	186	{
6d797957	187	static int current_slave = -1;
6d797957	188	static u32 current_m68k_pc;
00faec9c	189	SH2 *sh2o = &sh2ref[current->is_slave];
	190	u32 regs_a = (void )current;
	191	u32 regs_o = (void )sh2o;
	192	unsigned char v;
	193	u32 val;
	194	int i;
	195
	196	if (f == NULL)
	197	f = fopen("tracelog", "wb");
	198
6d797957	199	if (SekPc != current_m68k_pc) {
	200	current_m68k_pc = SekPc;
	201	write_uint(CTL_M68KPC, current_m68k_pc);
	202	}
	203
00faec9c	204	if (current->is_slave != current_slave) {
00faec9c	205	current_slave = current->is_slave;
6d797957	206	v = CTL_MASTERSLAVE \| current->is_slave;
00faec9c	207	fwrite(&v, 1, 1, f);
	208	}
	209
	210	for (i = 0; i < offsetof(SH2, read8_map) / 4; i++) {
	211	if (i == 17) // ppc
	212	continue;
	213	if (regs_a[i] != regs_o[i]) {
	214	write_uint(i, regs_a[i]);
	215	regs_o[i] = regs_a[i];
	216	}
	217	}
	218
	219	if (current->ea != sh2o->ea) {
6d797957	220	write_uint(CTL_EA, current->ea);
00faec9c	221	sh2o->ea = current->ea;
	222	}
	223	val = local_read32(current, current->ea);
	224	if (mem_val != val) {
6d797957	225	write_uint(CTL_EAVAL, val);
00faec9c	226	mem_val = val;
00faec9c	227	}
6d797957	228	write_uint(CTL_CYCLES, cycles);
00faec9c	229	}
	230
	231	static const char *regnames[] = {
	232	"r0", "r1", "r2", "r3",
	233	"r4", "r5", "r6", "r7",
	234	"r8", "r9", "r10", "r11",
	235	"r12", "r13", "r14", "r15",
	236	"pc", "ppc", "pr", "sr",
	237	"gbr", "vbr", "mach","macl",
	238	};
	239
6d797957	240	static void dump_regs(SH2 *sh2)
	241	{
	242	char csh2;
	243	int i;
	244
	245	csh2 = sh2->is_slave ? 's' : 'm';
	246	for (i = 0; i < 16/2; i++)
	247	printf("%csh2 r%d: %08x r%02d: %08x\n", csh2,
	248	i, sh2->r[i], i+8, sh2->r[i+8]);
	249	printf("%csh2 PC: %08x , %08x\n", csh2, sh2->pc, sh2->ppc);
	250	printf("%csh2 SR: %03x PR: %08x\n", csh2, sh2->sr, sh2->pr);
	251	}
	252
00faec9c	253	void do_sh2_cmp(SH2 *current)
	254	{
	255	static int current_slave;
	256	static u32 current_val;
	257	SH2 *sh2o = &sh2ref[current->is_slave];
	258	u32 regs_a = (void )current;
	259	u32 regs_o = (void )sh2o;
	260	unsigned char code;
	261	int cycles_o = 666;
	262	u32 sr, val;
	263	int bad = 0;
	264	int cycles;
	265	int i, ret;
00faec9c	266
6d797957	267	if (f == NULL) {
00faec9c	268	f = fopen("tracelog", "rb");
6d797957	269	sh2ref[1].is_slave = 1;
6d797957	270	}
00faec9c	271
	272	while (1) {
	273	ret = fread(&code, 1, 1, f);
	274	if (ret <= 0)
	275	break;
6d797957	276	if (code == CTL_CYCLES) {
00faec9c	277	fread(&cycles_o, 1, 4, f);
	278	break;
	279	}
	280
	281	switch (code) {
6d797957	282	case CTL_MASTERSLAVE:
6d797957	283	case CTL_MASTERSLAVE + 1:
00faec9c	284	current_slave = code & 1;
00faec9c	285	break;
6d797957	286	case CTL_EA:
00faec9c	287	fread(&sh2o->ea, 4, 1, f);
00faec9c	288	break;
6d797957	289	case CTL_EAVAL:
00faec9c	290	fread(&current_val, 4, 1, f);
00faec9c	291	break;
6d797957	292	case CTL_M68KPC:
	293	fread(&val, 4, 1, f);
	294	if (SekPc != val) {
	295	printf("m68k: %08x %08x\n", SekPc, val);
	296	bad = 1;
	297	}
	298	break;
00faec9c	299	default:
	300	if (code < offsetof(SH2, read8_map) / 4)
	301	fread(regs_o + code, 4, 1, f);
	302	else {
	303	printf("invalid code: %02x\n", code);
	304	goto end;
	305	}
	306	break;
	307	}
	308	}
	309
	310	if (ret <= 0) {
	311	printf("EOF?\n");
	312	goto end;
	313	}
	314
	315	if (current->is_slave != current_slave) {
	316	printf("bad slave: %d %d\n", current->is_slave,
	317	current_slave);
	318	bad = 1;
	319	}
	320
	321	for (i = 0; i < offsetof(SH2, read8_map) / 4; i++) {
	322	if (i == 17 \|\| i == 19) // ppc, sr
	323	continue;
	324	if (regs_a[i] != regs_o[i]) {
	325	printf("bad %4s: %08x %08x\n",
	326	regnames[i], regs_a[i], regs_o[i]);
	327	bad = 1;
	328	}
	329	}
	330
	331	sr = current->sr & 0x3f3;
	332	cycles = (signed int)current->sr >> 12;
	333
	334	if (sr != sh2o->sr) {
	335	printf("bad SR: %03x %03x\n", sr, sh2o->sr);
	336	bad = 1;
	337	}
	338
	339	if (cycles != cycles_o) {
	340	printf("bad cycles: %d %d\n", cycles, cycles_o);
	341	bad = 1;
	342	}
	343
	344	val = local_read32(current, sh2o->ea);
	345	if (val != current_val) {
	346	printf("bad val @%08x: %08x %08x\n", sh2o->ea, val, current_val);
	347	bad = 1;
	348	}
	349
	350	if (!bad) {
	351	sh2o->ppc = current->pc;
	352	return;
	353	}
	354
	355	end:
	356	printf("--\n");
6d797957	357	dump_regs(sh2o);
	358	if (current->is_slave != current_slave)
	359	dump_regs(&sh2ref[current->is_slave ^ 1]);
8cc76b48	360	PDebugDumpMem();
00faec9c	361	exit(1);
	362	}
	363
	364	#endif // DRC_CMP