[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->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>

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);
	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
679af8a3	17	int sh2_init(SH2 *sh2, int is_slave)
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;
5686d931	23	pdb_register_cpu(sh2, PDBCT_SH2, is_slave ? "ssh2" : "msh2");
679af8a3	24	#ifdef DRC_SH2
	25	ret = sh2_drc_init(sh2);
	26	#endif
	27	return ret;
41397701	28	}
41397701	29
e898de13	30	void sh2_finish(SH2 *sh2)
	31	{
	32	#ifdef DRC_SH2
	33	sh2_drc_finish(sh2);
	34	#endif
	35	}
	36
41397701	37	void sh2_reset(SH2 *sh2)
41397701	38	{
bcf65fd6	39	sh2->pc = p32x_sh2_read32(0, sh2);
bcf65fd6	40	sh2->r[15] = p32x_sh2_read32(4, sh2);
41397701	41	sh2->sr = I;
	42	sh2->vbr = 0;
	43	sh2->pending_int_irq = 0;
	44	}
	45
6add7875	46	void sh2_do_irq(SH2 *sh2, int level, int vector)
41397701	47	{
41397701	48	sh2->r[15] -= 4;
bcf65fd6	49	p32x_sh2_write32(sh2->r[15], sh2->sr, sh2); /* push SR onto stack */
41397701	50	sh2->r[15] -= 4;
bcf65fd6	51	p32x_sh2_write32(sh2->r[15], sh2->pc, sh2); /* push PC onto stack */
41397701	52
	53	/* set I flags in SR */
	54	sh2->sr = (sh2->sr & ~I) \| (level << 4);
	55
	56	/* fetch PC */
bcf65fd6	57	sh2->pc = p32x_sh2_read32(sh2->vbr + vector * 4, sh2);
41397701	58
41397701	59	/* 13 cycles at best */
00faec9c	60	sh2->icount -= 13;
41397701	61	}
41397701	62
a8fd6e37	63	int sh2_irl_irq(SH2 *sh2, int level, int nested_call)
41397701	64	{
a8fd6e37	65	int taken;
a8fd6e37	66
41397701	67	sh2->pending_irl = level;
1f1ff763	68	if (level < sh2->pending_int_irq)
	69	level = sh2->pending_int_irq;
	70	sh2->pending_level = level;
41397701	71
a8fd6e37	72	taken = (level > ((sh2->sr >> 4) & 0x0f));
	73	if (taken) {
	74	if (!nested_call) {
	75	// not in memhandler, so handle this now (recompiler friendly)
	76	// do this to avoid missing irqs that other SH2 might clear
1f1ff763	77	int vector = sh2->irq_callback(sh2, level);
1f1ff763	78	sh2_do_irq(sh2, level, vector);
00faec9c	79	sh2->m68krcycles_done += C_SH2_TO_M68K(*sh2, 13);
1f1ff763	80	}
a8fd6e37	81	else
a8fd6e37	82	sh2->test_irq = 1;
1f1ff763	83	}
a8fd6e37	84	return taken;
41397701	85	}
	86
	87	void sh2_internal_irq(SH2 *sh2, int level, int vector)
	88	{
6add7875	89	// FIXME: multiple internal irqs not handled..
6add7875	90	// assuming internal irqs never clear until accepted
41397701	91	sh2->pending_int_irq = level;
41397701	92	sh2->pending_int_vector = vector;
6add7875	93	if (level > sh2->pending_level)
6add7875	94	sh2->pending_level = level;
41397701	95
6add7875	96	sh2->test_irq = 1;
41397701	97	}
41397701	98
b4db550e	99	#define SH2_REG_SIZE (offsetof(SH2, macl) + sizeof(sh2->macl))
	100
	101	void sh2_pack(const SH2 sh2, unsigned char buff)
	102	{
	103	unsigned int *p;
	104
	105	memcpy(buff, sh2, SH2_REG_SIZE);
	106	p = (void *)(buff + SH2_REG_SIZE);
	107
	108	p[0] = sh2->pending_int_irq;
	109	p[1] = sh2->pending_int_vector;
b4db550e	110	}
	111
	112	void sh2_unpack(SH2 sh2, const unsigned char buff)
	113	{
	114	unsigned int *p;
	115
	116	memcpy(sh2, buff, SH2_REG_SIZE);
	117	p = (void *)(buff + SH2_REG_SIZE);
	118
	119	sh2->pending_int_irq = p[0];
	120	sh2->pending_int_vector = p[1];
27e26273	121	sh2->test_irq = 1;
b4db550e	122	}
b4db550e	123
00faec9c	124	#ifdef DRC_CMP
	125
	126	/* trace/compare */
	127	#include <stdio.h>
	128	#include <stdlib.h>
	129	#include <pico/memory.h>
	130
	131	static SH2 sh2ref[2];
	132	static int current_slave = -1;
	133	static unsigned int mem_val;
	134	static FILE *f;
	135
	136	#define SH2MAP_ADDR2OFFS_R(a) \
	137	((((a) >> 25) & 3) \| (((a) >> 27) & 0x1c))
	138
	139	static unsigned int local_read32(SH2 *sh2, u32 a)
	140	{
	141	const sh2_memmap *sh2_map = sh2->read16_map;
	142	uptr p;
	143
	144	sh2_map += SH2MAP_ADDR2OFFS_R(a);
	145	p = sh2_map->addr;
	146	if (!map_flag_set(p)) {
	147	u16 pd = (u16 )((p << 1) + ((a & sh2_map->mask) & ~3));
	148	return (pd[0] << 16) \| pd[1];
	149	}
	150
	151	return 0;
	152	}
	153
	154	static void write_uint(unsigned char ctl, unsigned int v)
	155	{
	156	fwrite(&ctl, 1, 1, f);
	157	fwrite(&v, sizeof(v), 1, f);
	158	}
	159
	160	void do_sh2_trace(SH2 *current, int cycles)
	161	{
	162	SH2 *sh2o = &sh2ref[current->is_slave];
	163	u32 regs_a = (void )current;
	164	u32 regs_o = (void )sh2o;
	165	unsigned char v;
	166	u32 val;
	167	int i;
	168
	169	if (f == NULL)
	170	f = fopen("tracelog", "wb");
	171
	172	if (current->is_slave != current_slave) {
	173	current_slave = current->is_slave;
	174	v = 0x80 \| current->is_slave;
	175	fwrite(&v, 1, 1, f);
	176	}
	177
	178	for (i = 0; i < offsetof(SH2, read8_map) / 4; i++) {
	179	if (i == 17) // ppc
	180	continue;
	181	if (regs_a[i] != regs_o[i]) {
	182	write_uint(i, regs_a[i]);
	183	regs_o[i] = regs_a[i];
	184	}
	185	}
	186
	187	if (current->ea != sh2o->ea) {
188	write_uint(0x82, current->ea);
189	sh2o->ea = current->ea;
190	}
191	val = local_read32(current, current->ea);
192	if (mem_val != val) {
193	write_uint(0x83, val);
194	mem_val = val;
195	}
196	write_uint(0x84, cycles);
197	}
198
199	static const char *regnames[] = {
200	"r0", "r1", "r2", "r3",
201	"r4", "r5", "r6", "r7",
202	"r8", "r9", "r10", "r11",
203	"r12", "r13", "r14", "r15",
204	"pc", "ppc", "pr", "sr",
205	"gbr", "vbr", "mach","macl",
206	};
207
208	void do_sh2_cmp(SH2 *current)
209	{
210	static int current_slave;
211	static u32 current_val;
212	SH2 *sh2o = &sh2ref[current->is_slave];
213	u32 regs_a = (void )current;
214	u32 regs_o = (void )sh2o;
215	unsigned char code;
216	int cycles_o = 666;
217	u32 sr, val;
218	int bad = 0;
219	int cycles;
220	int i, ret;
221	char csh2;
222
223	if (f == NULL)
224	f = fopen("tracelog", "rb");
225
226	while (1) {
227	ret = fread(&code, 1, 1, f);
228	if (ret <= 0)
229	break;
230	if (code == 0x84) {
231	fread(&cycles_o, 1, 4, f);
232	break;
233	}
234
235	switch (code) {
236	case 0x80:
237	case 0x81:
238	current_slave = code & 1;
239	break;
240	case 0x82:
241	fread(&sh2o->ea, 4, 1, f);
242	break;
243	case 0x83:
244	fread(&current_val, 4, 1, f);
245	break;
246	default:
247	if (code < offsetof(SH2, read8_map) / 4)
248	fread(regs_o + code, 4, 1, f);
249	else {
250	printf("invalid code: %02x\n", code);
251	goto end;
252	}
253	break;
254	}
255	}
256
257	if (ret <= 0) {
258	printf("EOF?\n");
259	goto end;
260	}
261
262	if (current->is_slave != current_slave) {
263	printf("bad slave: %d %d\n", current->is_slave,
264	current_slave);
265	bad = 1;
266	}
267
268	for (i = 0; i < offsetof(SH2, read8_map) / 4; i++) {
269	if (i == 17 \|\| i == 19) // ppc, sr
270	continue;
271	if (regs_a[i] != regs_o[i]) {
272	printf("bad %4s: %08x %08x\n",
273	regnames[i], regs_a[i], regs_o[i]);
274	bad = 1;
275	}
276	}
277
278	sr = current->sr & 0x3f3;
279	cycles = (signed int)current->sr >> 12;
280
281	if (sr != sh2o->sr) {
282	printf("bad SR: %03x %03x\n", sr, sh2o->sr);
283	bad = 1;
284	}
285
286	if (cycles != cycles_o) {
287	printf("bad cycles: %d %d\n", cycles, cycles_o);
288	bad = 1;
289	}
290
291	val = local_read32(current, sh2o->ea);
292	if (val != current_val) {
293	printf("bad val @%08x: %08x %08x\n", sh2o->ea, val, current_val);
294	bad = 1;
295	}
296
297	if (!bad) {
298	sh2o->ppc = current->pc;
299	return;
300	}
301
302	end:
303	printf("--\n");
304	csh2 = current->is_slave ? 's' : 'm';
305	for (i = 0; i < 16/2; i++)
306	printf("%csh2 r%d: %08x r%02d: %08x\n", csh2,
307	i, sh2o->r[i], i+8, sh2o->r[i+8]);
308	printf("%csh2 PC: %08x , %08x\n", csh2, sh2o->pc, sh2o->ppc);
309	printf("%csh2 SR: %03x PR: %08x\n", csh2, sh2o->sr, sh2o->pr);
310	exit(1);
311	}
312
313	#endif // DRC_CMP