[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>
#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,
};

#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;
	u16 *pd;
	uptr p;

	sh2_map += SH2MAP_ADDR2OFFS_R(a);
	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 *)Pico32xMem->data_array[sh2->is_slave]
			+ (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
	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	#undef _USE_CZ80 // HACK
	133	#include <pico/pico_int.h>
	134	#include <pico/debug.h>
	135
	136	static SH2 sh2ref[2];
	137	static unsigned int mem_val;
	138	static FILE *f;
	139
	140	enum ctl_byte {
	141	CTL_MASTERSLAVE = 0x80,
	142	CTL_EA = 0x82,
	143	CTL_EAVAL = 0x83,
	144	CTL_M68KPC = 0x84,
	145	CTL_CYCLES = 0x85,
	146	};
	147
	148	#define SH2MAP_ADDR2OFFS_R(a) \
	149	((((a) >> 25) & 3) \| (((a) >> 27) & 0x1c))
	150
	151	static unsigned int local_read32(SH2 *sh2, u32 a)
	152	{
	153	const sh2_memmap *sh2_map = sh2->read16_map;
	154	u16 *pd;
	155	uptr p;
	156
	157	sh2_map += SH2MAP_ADDR2OFFS_R(a);
	158	p = sh2_map->addr;
	159	if (!map_flag_set(p)) {
	160	pd = (u16 *)((p << 1) + ((a & sh2_map->mask) & ~1));
	161	return (pd[0] << 16) \| pd[1];
	162	}
	163
	164	if ((a & 0xfffff000) == 0xc0000000) {
	165	// data array
	166	pd = (u16 *)Pico32xMem->data_array[sh2->is_slave]
	167	+ (a & 0xfff) / 2;
	168	return (pd[0] << 16) \| pd[1];
	169	}
	170	if ((a & 0xdfffffc0) == 0x4000) {
	171	pd = &Pico32x.regs[(a & 0x3f) / 2];
	172	return (pd[0] << 16) \| pd[1];
	173	}
	174	if ((a & 0xdffffe00) == 0x4200) {
	175	pd = &Pico32xMem->pal[(a & 0x1ff) / 2];
	176	return (pd[0] << 16) \| pd[1];
	177	}
	178
	179	return 0;
	180	}
	181
	182	static void write_uint(unsigned char ctl, unsigned int v)
	183	{
	184	fwrite(&ctl, 1, 1, f);
	185	fwrite(&v, sizeof(v), 1, f);
	186	}
	187
	188	void do_sh2_trace(SH2 *current, int cycles)
	189	{
	190	static int current_slave = -1;
	191	static u32 current_m68k_pc;
	192	SH2 *sh2o = &sh2ref[current->is_slave];
	193	u32 regs_a = (void )current;
	194	u32 regs_o = (void )sh2o;
	195	unsigned char v;
	196	u32 val;
	197	int i;
	198
	199	if (f == NULL)
	200	f = fopen("tracelog", "wb");
	201
	202	if (SekPc != current_m68k_pc) {
	203	current_m68k_pc = SekPc;
	204	write_uint(CTL_M68KPC, current_m68k_pc);
	205	}
	206
	207	if (current->is_slave != current_slave) {
	208	current_slave = current->is_slave;
	209	v = CTL_MASTERSLAVE \| current->is_slave;
	210	fwrite(&v, 1, 1, f);
	211	}
	212
	213	for (i = 0; i < offsetof(SH2, read8_map) / 4; i++) {
	214	if (i == 17) // ppc
	215	continue;
	216	if (regs_a[i] != regs_o[i]) {
	217	write_uint(i, regs_a[i]);
	218	regs_o[i] = regs_a[i];
	219	}
	220	}
	221
	222	if (current->ea != sh2o->ea) {
	223	write_uint(CTL_EA, current->ea);
	224	sh2o->ea = current->ea;
	225	}
	226	val = local_read32(current, current->ea);
	227	if (mem_val != val) {
	228	write_uint(CTL_EAVAL, val);
	229	mem_val = val;
	230	}
	231	write_uint(CTL_CYCLES, cycles);
	232	}
	233
	234	static const char *regnames[] = {
	235	"r0", "r1", "r2", "r3",
	236	"r4", "r5", "r6", "r7",
	237	"r8", "r9", "r10", "r11",
	238	"r12", "r13", "r14", "r15",
	239	"pc", "ppc", "pr", "sr",
	240	"gbr", "vbr", "mach","macl",
	241	};
	242
	243	static void dump_regs(SH2 *sh2)
	244	{
	245	char csh2;
	246	int i;
	247
	248	csh2 = sh2->is_slave ? 's' : 'm';
	249	for (i = 0; i < 16/2; i++)
	250	printf("%csh2 r%d: %08x r%02d: %08x\n", csh2,
	251	i, sh2->r[i], i+8, sh2->r[i+8]);
	252	printf("%csh2 PC: %08x , %08x\n", csh2, sh2->pc, sh2->ppc);
	253	printf("%csh2 SR: %03x PR: %08x\n", csh2, sh2->sr, sh2->pr);
	254	}
	255
	256	void do_sh2_cmp(SH2 *current)
	257	{
	258	static int current_slave;
	259	static u32 current_val;
	260	SH2 *sh2o = &sh2ref[current->is_slave];
	261	u32 regs_a = (void )current;
	262	u32 regs_o = (void )sh2o;
	263	unsigned char code;
	264	int cycles_o = 666;
	265	u32 sr, val;
	266	int bad = 0;
	267	int cycles;
	268	int i, ret;
	269
	270	if (f == NULL) {
	271	f = fopen("tracelog", "rb");
	272	sh2ref[1].is_slave = 1;
	273	}
	274
	275	while (1) {
	276	ret = fread(&code, 1, 1, f);
	277	if (ret <= 0)
	278	break;
	279	if (code == CTL_CYCLES) {
	280	fread(&cycles_o, 1, 4, f);
	281	break;
	282	}
	283
	284	switch (code) {
	285	case CTL_MASTERSLAVE:
	286	case CTL_MASTERSLAVE + 1:
	287	current_slave = code & 1;
	288	break;
	289	case CTL_EA:
	290	fread(&sh2o->ea, 4, 1, f);
	291	break;
	292	case CTL_EAVAL:
	293	fread(&current_val, 4, 1, f);
	294	break;
	295	case CTL_M68KPC:
	296	fread(&val, 4, 1, f);
	297	if (SekPc != val) {
	298	printf("m68k: %08x %08x\n", SekPc, val);
	299	bad = 1;
	300	}
	301	break;
	302	default:
	303	if (code < offsetof(SH2, read8_map) / 4)
	304	fread(regs_o + code, 4, 1, f);
	305	else {
	306	printf("invalid code: %02x\n", code);
	307	goto end;
	308	}
	309	break;
	310	}
	311	}
	312
	313	if (ret <= 0) {
	314	printf("EOF?\n");
	315	goto end;
	316	}
	317
	318	if (current->is_slave != current_slave) {
	319	printf("bad slave: %d %d\n", current->is_slave,
	320	current_slave);
	321	bad = 1;
	322	}
	323
	324	for (i = 0; i < offsetof(SH2, read8_map) / 4; i++) {
	325	if (i == 17 \|\| i == 19) // ppc, sr
	326	continue;
	327	if (regs_a[i] != regs_o[i]) {
	328	printf("bad %4s: %08x %08x\n",
	329	regnames[i], regs_a[i], regs_o[i]);
	330	bad = 1;
	331	}
	332	}
	333
	334	sr = current->sr & 0x3f3;
	335	cycles = (signed int)current->sr >> 12;
	336
	337	if (sr != sh2o->sr) {
	338	printf("bad SR: %03x %03x\n", sr, sh2o->sr);
	339	bad = 1;
	340	}
	341
	342	if (cycles != cycles_o) {
	343	printf("bad cycles: %d %d\n", cycles, cycles_o);
	344	bad = 1;
	345	}
	346
	347	val = local_read32(current, sh2o->ea);
	348	if (val != current_val) {
	349	printf("bad val @%08x: %08x %08x\n", sh2o->ea, val, current_val);
	350	bad = 1;
	351	}
	352
	353	if (!bad) {
	354	sh2o->ppc = current->pc;
	355	return;
	356	}
	357
	358	end:
	359	printf("--\n");
	360	dump_regs(sh2o);
	361	if (current->is_slave != current_slave)
	362	dump_regs(&sh2ref[current->is_slave ^ 1]);
	363	PDebugDumpMem();
	364	exit(1);
	365	}
	366
	367	#endif // DRC_CMP