[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)
{
	int ret = 0;

	memset(sh2, 0, offsetof(SH2, mult_m68k_to_sh2));
	sh2->is_slave = is_slave;
	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>
#include <pico/debug.h>

static SH2 sh2ref[2];
static int current_slave = -1;
static unsigned int mem_val;
static FILE *f;

#define SH2MAP_ADDR2OFFS_R(a) \
  ((((a) >> 25) & 3) | (((a) >> 27) & 0x1c))

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

	sh2_map += SH2MAP_ADDR2OFFS_R(a);
	p = sh2_map->addr;
	if (!map_flag_set(p)) {
		u16 *pd = (u16 *)((p << 1) + ((a & sh2_map->mask) & ~3));
		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)
{
	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 (current->is_slave != current_slave) {
		current_slave = current->is_slave;
		v = 0x80 | 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(0x82, current->ea);
		sh2o->ea = current->ea;
	}
	val = local_read32(current, current->ea);
	if (mem_val != val) {
		write_uint(0x83, val);
		mem_val = val;
	}
	write_uint(0x84, 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",
};

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;
	char csh2;

	if (f == NULL)
		f = fopen("tracelog", "rb");

	while (1) {
		ret = fread(&code, 1, 1, f);
		if (ret <= 0)
			break;
		if (code == 0x84) {
			fread(&cycles_o, 1, 4, f);
			break;
		}

		switch (code) {
		case 0x80:
		case 0x81:
			current_slave = code & 1;
			break;
		case 0x82:
			fread(&sh2o->ea, 4, 1, f);
			break;
		case 0x83:
			fread(&current_val, 4, 1, f);
			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");
	csh2 = current->is_slave ? 's' : 'm';
	for (i = 0; i < 16/2; i++)
		printf("%csh2 r%d: %08x r%02d: %08x\n", csh2,
			i, sh2o->r[i], i+8, sh2o->r[i+8]);
	printf("%csh2 PC: %08x  ,   %08x\n", csh2, sh2o->pc, sh2o->ppc);
	printf("%csh2 SR:      %03x  PR: %08x\n", csh2, sh2o->sr, sh2o->pr);
	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)
	18	{
	19	int ret = 0;
	20
	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");
	24	#ifdef DRC_SH2
	25	ret = sh2_drc_init(sh2);
	26	#endif
	27	return ret;
	28	}
	29
	30	void sh2_finish(SH2 *sh2)
	31	{
	32	#ifdef DRC_SH2
	33	sh2_drc_finish(sh2);
	34	#endif
	35	}
	36
	37	void sh2_reset(SH2 *sh2)
	38	{
	39	sh2->pc = p32x_sh2_read32(0, sh2);
	40	sh2->r[15] = p32x_sh2_read32(4, sh2);
	41	sh2->sr = I;
	42	sh2->vbr = 0;
	43	sh2->pending_int_irq = 0;
	44	}
	45
	46	void sh2_do_irq(SH2 *sh2, int level, int vector)
	47	{
	48	sh2->sr &= 0x3f3;
	49
	50	sh2->r[15] -= 4;
	51	p32x_sh2_write32(sh2->r[15], sh2->sr, sh2); /* push SR onto stack */
	52	sh2->r[15] -= 4;
	53	p32x_sh2_write32(sh2->r[15], sh2->pc, sh2); /* push PC onto stack */
	54
	55	/* set I flags in SR */
	56	sh2->sr = (sh2->sr & ~I) \| (level << 4);
	57
	58	/* fetch PC */
	59	sh2->pc = p32x_sh2_read32(sh2->vbr + vector * 4, sh2);
	60
	61	/* 13 cycles at best */
	62	sh2->icount -= 13;
	63	}
	64
	65	int sh2_irl_irq(SH2 *sh2, int level, int nested_call)
	66	{
	67	int taken;
	68
	69	sh2->pending_irl = level;
	70	if (level < sh2->pending_int_irq)
	71	level = sh2->pending_int_irq;
	72	sh2->pending_level = level;
	73
	74	taken = (level > ((sh2->sr >> 4) & 0x0f));
	75	if (taken) {
	76	if (!nested_call) {
	77	// not in memhandler, so handle this now (recompiler friendly)
	78	// do this to avoid missing irqs that other SH2 might clear
	79	int vector = sh2->irq_callback(sh2, level);
	80	sh2_do_irq(sh2, level, vector);
	81	sh2->m68krcycles_done += C_SH2_TO_M68K(*sh2, 13);
	82	}
	83	else
	84	sh2->test_irq = 1;
	85	}
	86	return taken;
	87	}
	88
	89	void sh2_internal_irq(SH2 *sh2, int level, int vector)
	90	{
	91	// FIXME: multiple internal irqs not handled..
	92	// assuming internal irqs never clear until accepted
	93	sh2->pending_int_irq = level;
	94	sh2->pending_int_vector = vector;
	95	if (level > sh2->pending_level)
	96	sh2->pending_level = level;
	97
	98	sh2->test_irq = 1;
	99	}
	100
	101	#define SH2_REG_SIZE (offsetof(SH2, macl) + sizeof(sh2->macl))
	102
	103	void sh2_pack(const SH2 sh2, unsigned char buff)
	104	{
	105	unsigned int *p;
	106
	107	memcpy(buff, sh2, SH2_REG_SIZE);
	108	p = (void *)(buff + SH2_REG_SIZE);
	109
	110	p[0] = sh2->pending_int_irq;
	111	p[1] = sh2->pending_int_vector;
	112	}
	113
	114	void sh2_unpack(SH2 sh2, const unsigned char buff)
	115	{
	116	unsigned int *p;
	117
	118	memcpy(sh2, buff, SH2_REG_SIZE);
	119	p = (void *)(buff + SH2_REG_SIZE);
	120
	121	sh2->pending_int_irq = p[0];
	122	sh2->pending_int_vector = p[1];
	123	sh2->test_irq = 1;
	124	}
	125
	126	#ifdef DRC_CMP
	127
	128	/* trace/compare */
	129	#include <stdio.h>
	130	#include <stdlib.h>
	131	#include <pico/memory.h>
	132	#include <pico/debug.h>
	133
	134	static SH2 sh2ref[2];
	135	static int current_slave = -1;
	136	static unsigned int mem_val;
	137	static FILE *f;
	138
	139	#define SH2MAP_ADDR2OFFS_R(a) \
	140	((((a) >> 25) & 3) \| (((a) >> 27) & 0x1c))
	141
	142	static unsigned int local_read32(SH2 *sh2, u32 a)
	143	{
	144	const sh2_memmap *sh2_map = sh2->read16_map;
	145	uptr p;
	146
	147	sh2_map += SH2MAP_ADDR2OFFS_R(a);
	148	p = sh2_map->addr;
	149	if (!map_flag_set(p)) {
	150	u16 pd = (u16 )((p << 1) + ((a & sh2_map->mask) & ~3));
	151	return (pd[0] << 16) \| pd[1];
	152	}
	153
	154	return 0;
	155	}
	156
	157	static void write_uint(unsigned char ctl, unsigned int v)
	158	{
	159	fwrite(&ctl, 1, 1, f);
	160	fwrite(&v, sizeof(v), 1, f);
	161	}
	162
	163	void do_sh2_trace(SH2 *current, int cycles)
	164	{
	165	SH2 *sh2o = &sh2ref[current->is_slave];
	166	u32 regs_a = (void )current;
	167	u32 regs_o = (void )sh2o;
	168	unsigned char v;
	169	u32 val;
	170	int i;
	171
	172	if (f == NULL)
	173	f = fopen("tracelog", "wb");
	174
	175	if (current->is_slave != current_slave) {
	176	current_slave = current->is_slave;
	177	v = 0x80 \| current->is_slave;
	178	fwrite(&v, 1, 1, f);
	179	}
	180
	181	for (i = 0; i < offsetof(SH2, read8_map) / 4; i++) {
	182	if (i == 17) // ppc
	183	continue;
	184	if (regs_a[i] != regs_o[i]) {
	185	write_uint(i, regs_a[i]);
	186	regs_o[i] = regs_a[i];
	187	}
	188	}
	189
	190	if (current->ea != sh2o->ea) {
	191	write_uint(0x82, current->ea);
	192	sh2o->ea = current->ea;
	193	}
	194	val = local_read32(current, current->ea);
	195	if (mem_val != val) {
	196	write_uint(0x83, val);
	197	mem_val = val;
	198	}
	199	write_uint(0x84, cycles);
	200	}
	201
	202	static const char *regnames[] = {
	203	"r0", "r1", "r2", "r3",
	204	"r4", "r5", "r6", "r7",
	205	"r8", "r9", "r10", "r11",
	206	"r12", "r13", "r14", "r15",
	207	"pc", "ppc", "pr", "sr",
	208	"gbr", "vbr", "mach","macl",
	209	};
	210
	211	void do_sh2_cmp(SH2 *current)
	212	{
	213	static int current_slave;
	214	static u32 current_val;
	215	SH2 *sh2o = &sh2ref[current->is_slave];
	216	u32 regs_a = (void )current;
	217	u32 regs_o = (void )sh2o;
	218	unsigned char code;
	219	int cycles_o = 666;
	220	u32 sr, val;
	221	int bad = 0;
	222	int cycles;
	223	int i, ret;
	224	char csh2;
	225
	226	if (f == NULL)
	227	f = fopen("tracelog", "rb");
	228
	229	while (1) {
	230	ret = fread(&code, 1, 1, f);
	231	if (ret <= 0)
	232	break;
	233	if (code == 0x84) {
	234	fread(&cycles_o, 1, 4, f);
	235	break;
	236	}
	237
	238	switch (code) {
	239	case 0x80:
	240	case 0x81:
	241	current_slave = code & 1;
	242	break;
	243	case 0x82:
	244	fread(&sh2o->ea, 4, 1, f);
	245	break;
	246	case 0x83:
	247	fread(&current_val, 4, 1, f);
	248	break;
	249	default:
	250	if (code < offsetof(SH2, read8_map) / 4)
	251	fread(regs_o + code, 4, 1, f);
	252	else {
	253	printf("invalid code: %02x\n", code);
	254	goto end;
	255	}
	256	break;
	257	}
	258	}
	259
	260	if (ret <= 0) {
	261	printf("EOF?\n");
	262	goto end;
	263	}
	264
	265	if (current->is_slave != current_slave) {
	266	printf("bad slave: %d %d\n", current->is_slave,
	267	current_slave);
	268	bad = 1;
	269	}
	270
	271	for (i = 0; i < offsetof(SH2, read8_map) / 4; i++) {
	272	if (i == 17 \|\| i == 19) // ppc, sr
	273	continue;
	274	if (regs_a[i] != regs_o[i]) {
	275	printf("bad %4s: %08x %08x\n",
	276	regnames[i], regs_a[i], regs_o[i]);
	277	bad = 1;
	278	}
	279	}
	280
	281	sr = current->sr & 0x3f3;
	282	cycles = (signed int)current->sr >> 12;
	283
	284	if (sr != sh2o->sr) {
	285	printf("bad SR: %03x %03x\n", sr, sh2o->sr);
	286	bad = 1;
	287	}
	288
	289	if (cycles != cycles_o) {
	290	printf("bad cycles: %d %d\n", cycles, cycles_o);
	291	bad = 1;
	292	}
	293
	294	val = local_read32(current, sh2o->ea);
	295	if (val != current_val) {
	296	printf("bad val @%08x: %08x %08x\n", sh2o->ea, val, current_val);
	297	bad = 1;
	298	}
	299
	300	if (!bad) {
	301	sh2o->ppc = current->pc;
	302	return;
	303	}
	304
	305	end:
	306	printf("--\n");
	307	csh2 = current->is_slave ? 's' : 'm';
	308	for (i = 0; i < 16/2; i++)
	309	printf("%csh2 r%d: %08x r%02d: %08x\n", csh2,
	310	i, sh2o->r[i], i+8, sh2o->r[i+8]);
	311	printf("%csh2 PC: %08x , %08x\n", csh2, sh2o->pc, sh2o->ppc);
	312	printf("%csh2 SR: %03x PR: %08x\n", csh2, sh2o->sr, sh2o->pr);
	313	PDebugDumpMem();
	314	exit(1);
	315	}
	316
	317	#endif // DRC_CMP