[picodrive.git] / platform / gp2x / code940 / 940.c

// The top-level functions for the ARM940\r
// (c) Copyright 2006-2007, Grazvydas "notaz" Ignotas\r
\r
#include "940shared.h"\r
#include "../../common/mp3.h"\r
\r
static _940_data_t *shared_data = (_940_data_t *)   0x00100000;\r
static _940_ctl_t  *shared_ctl  = (_940_ctl_t *)    0x00200000;\r
static unsigned char *mp3_data  = (unsigned char *) 0x00400000;\r
YM2612 *ym2612_940;\r
\r
// from init.s\r
int  wait_get_job(int oldjob);\r
void spend_cycles(int c);\r
void dcache_clean(void);\r
void dcache_clean_flush(void);\r
void drain_wb(void);\r
// this should help to resolve race confition where shared var\r
// is changed by other core just before we update it\r
void set_if_not_changed(int *val, int oldval, int newval);\r
\r
void _memcpy(void *dst, const void *src, int count);\r
\r
//	asm volatile ("mov r0, #0" ::: "r0");\r
//	asm volatile ("mcr p15, 0, r0, c7, c6,  0" ::: "r0"); /* flush dcache */\r
//	asm volatile ("mcr p15, 0, r0, c7, c10, 4" ::: "r0"); /* drain write buffer */\r
\r
\r
static void mp3_decode(void)\r
{\r
	int mp3_offs = shared_ctl->mp3_offs;\r
	unsigned char *readPtr = mp3_data + mp3_offs;\r
	int bytesLeft = shared_ctl->mp3_len - mp3_offs;\r
	int offset; // frame offset from readPtr\r
	int retries = 0, err;\r
\r
	if (bytesLeft <= 0) return; // EOF, nothing to do\r
\r
	for (retries = 0; retries < 2; retries++)\r
	{\r
		offset = mp3_find_sync_word(readPtr, bytesLeft);\r
		if (offset < 0)\r
			goto set_eof;\r
\r
		readPtr += offset;\r
		bytesLeft -= offset;\r
\r
		err = MP3Decode(shared_data->mp3dec, &readPtr, &bytesLeft,\r
				shared_data->mp3_buffer[shared_ctl->mp3_buffsel], 0);\r
		if (err) {\r
			if (err == ERR_MP3_MAINDATA_UNDERFLOW)\r
				// just need another frame\r
				continue;\r
\r
			if (err == ERR_MP3_INDATA_UNDERFLOW)\r
				goto set_eof;\r
\r
			if (err <= -6 && err >= -12) {\r
				// ERR_MP3_INVALID_FRAMEHEADER, ERR_MP3_INVALID_*\r
				// just try to skip the offending frame..\r
				readPtr++;\r
				bytesLeft--;\r
				continue;\r
			}\r
			shared_ctl->mp3_errors++;\r
			shared_ctl->mp3_lasterr = err;\r
		}\r
		break;\r
	}\r
\r
	set_if_not_changed(&shared_ctl->mp3_offs, mp3_offs, readPtr - mp3_data);\r
	return;\r
\r
set_eof:\r
	set_if_not_changed(&shared_ctl->mp3_offs, mp3_offs, shared_ctl->mp3_len);\r
}\r
\r
static void ym_flush_writes(void)\r
{\r
	UINT16 *wbuff;\r
	int i;\r
\r
	if (shared_ctl->writebuffsel == 1) {\r
		wbuff = shared_ctl->writebuff1;\r
	} else {\r
		wbuff = shared_ctl->writebuff0;\r
	}\r
\r
	/* playback all writes */\r
	for (i = 2048; i > 0; i--) {\r
		UINT16 d = *wbuff++;\r
		if (d == 0xffff) break;\r
		if (d == 0xfffe) continue;\r
		YM2612Write_(d >> 8, d);\r
	}\r
}\r
\r
static void ym_update(int *ym_buffer)\r
{\r
	int i, dw;\r
	int two_upds = 0;\r
	UINT16 *wbuff;\r
\r
	if (shared_ctl->writebuffsel == 1) {\r
		wbuff = shared_ctl->writebuff1;\r
	} else {\r
		wbuff = shared_ctl->writebuff0;\r
	}\r
\r
	/* playback all writes */\r
	for (i = 2048/2; i > 0; i--) {\r
		UINT16 d;\r
		dw = *(int *)wbuff;\r
		d = dw;\r
		wbuff++;\r
		if (d == 0xffff) break;\r
		if (d == 0xfffe) { two_upds=1; break; }\r
		YM2612Write_(d >> 8, d);\r
		d = (dw>>16);\r
		wbuff++;\r
		if (d == 0xffff) break;\r
		if (d == 0xfffe) { two_upds=1; break; }\r
		YM2612Write_(d >> 8, d);\r
	}\r
\r
	if (two_upds)\r
	{\r
		int len1 = shared_ctl->length / 2;\r
		shared_ctl->ym_active_chs =\r
			YM2612UpdateOne_(ym_buffer, len1, shared_ctl->stereo, 1);\r
\r
		for (i *= 2; i > 0; i--) {\r
			UINT16 d = *wbuff++;\r
			if (d == 0xffff) break;\r
			YM2612Write_(d >> 8, d);\r
		}\r
\r
		ym_buffer += shared_ctl->stereo ? len1*2 : len1;\r
		len1 = shared_ctl->length - len1;\r
\r
		shared_ctl->ym_active_chs =\r
			YM2612UpdateOne_(ym_buffer, len1, shared_ctl->stereo, 1);\r
	} else {\r
		shared_ctl->ym_active_chs =\r
			YM2612UpdateOne_(ym_buffer, shared_ctl->length, shared_ctl->stereo, 1);\r
	}\r
}\r
\r
\r
void Main940(void)\r
{\r
	int *ym_buffer = shared_data->ym_buffer;\r
	int job = 0;\r
	ym2612_940 = &shared_data->ym2612;\r
\r
\r
	for (;;)\r
	{\r
		job = wait_get_job(job);\r
\r
		shared_ctl->lastjob = job;\r
\r
		switch (job)\r
		{\r
			case JOB940_INITALL:\r
				/* ym2612 */\r
				shared_ctl->writebuff0[0] = shared_ctl->writebuff1[0] = 0xffff;\r
				YM2612Init_(shared_ctl->baseclock, shared_ctl->rate);\r
				/* Helix mp3 decoder */\r
				shared_data->mp3dec = MP3InitDecoder();\r
				break;\r
\r
			case JOB940_INVALIDATE_DCACHE:\r
				drain_wb();\r
				dcache_clean_flush();\r
				break;\r
\r
			case JOB940_YM2612RESETCHIP:\r
				YM2612ResetChip_();\r
				break;\r
\r
			case JOB940_PICOSTATELOAD:\r
				YM2612PicoStateLoad_();\r
				break;\r
\r
			case JOB940_PICOSTATESAVE2:\r
				YM2612PicoStateSave2(0, 0);\r
				_memcpy(shared_ctl->writebuff0, ym2612_940->REGS, 0x200);\r
				break;\r
\r
			case JOB940_PICOSTATELOAD2_PREP:\r
				ym_flush_writes();\r
				break;\r
\r
			case JOB940_PICOSTATELOAD2:\r
				_memcpy(ym2612_940->REGS, shared_ctl->writebuff0, 0x200);\r
				YM2612PicoStateLoad2(0, 0);\r
				break;\r
\r
			case JOB940_YM2612UPDATEONE:\r
				ym_update(ym_buffer);\r
				break;\r
\r
			case JOB940_MP3DECODE:\r
				mp3_decode();\r
				break;\r
\r
			case JOB940_MP3RESET:\r
				if (shared_data->mp3dec) MP3FreeDecoder(shared_data->mp3dec);\r
				shared_data->mp3dec = MP3InitDecoder();\r
				break;\r
		}\r
\r
		shared_ctl->loopc++;\r
		dcache_clean();\r
	}\r
}\r
\r
Commit	Line	Data
6cadc2da	1	// The top-level functions for the ARM940\r
	2	// (c) Copyright 2006-2007, Grazvydas "notaz" Ignotas\r
	3	\r
cc68a136	4	#include "940shared.h"\r
7c18e34a	5	#include "../../common/mp3.h"\r
cc68a136	6	\r
42c7b147	7	static _940_data_t shared_data = (_940_data_t ) 0x00100000;\r
42c7b147	8	static _940_ctl_t shared_ctl = (_940_ctl_t ) 0x00200000;\r
e362c573	9	static unsigned char mp3_data = (unsigned char ) 0x00400000;\r
cc68a136	10	YM2612 *ym2612_940;\r
cc68a136	11	\r
cc68a136	12	// from init.s\r
abe0ea43	13	int wait_get_job(int oldjob);\r
cc68a136	14	void spend_cycles(int c);\r
abe0ea43	15	void dcache_clean(void);\r
	16	void dcache_clean_flush(void);\r
	17	void drain_wb(void);\r
51a902ae	18	// this should help to resolve race confition where shared var\r
	19	// is changed by other core just before we update it\r
	20	void set_if_not_changed(int *val, int oldval, int newval);\r
cc68a136	21	\r
e4fb433c	22	void _memcpy(void dst, const void src, int count);\r
e4fb433c	23	\r
cc68a136	24	// asm volatile ("mov r0, #0" ::: "r0");\r
	25	// asm volatile ("mcr p15, 0, r0, c7, c6, 0" ::: "r0"); /* flush dcache */\r
	26	// asm volatile ("mcr p15, 0, r0, c7, c10, 4" ::: "r0"); /* drain write buffer */\r
	27	\r
51a902ae	28	\r
	29	static void mp3_decode(void)\r
	30	{\r
	31	int mp3_offs = shared_ctl->mp3_offs;\r
	32	unsigned char *readPtr = mp3_data + mp3_offs;\r
	33	int bytesLeft = shared_ctl->mp3_len - mp3_offs;\r
	34	int offset; // frame offset from readPtr\r
091facb8	35	int retries = 0, err;\r
51a902ae	36	\r
	37	if (bytesLeft <= 0) return; // EOF, nothing to do\r
	38	\r
7c34867a	39	for (retries = 0; retries < 2; retries++)\r
7c34867a	40	{\r
7c18e34a	41	offset = mp3_find_sync_word(readPtr, bytesLeft);\r
7c34867a	42	if (offset < 0)\r
	43	goto set_eof;\r
	44	\r
	45	readPtr += offset;\r
	46	bytesLeft -= offset;\r
	47	\r
	48	err = MP3Decode(shared_data->mp3dec, &readPtr, &bytesLeft,\r
	49	shared_data->mp3_buffer[shared_ctl->mp3_buffsel], 0);\r
	50	if (err) {\r
	51	if (err == ERR_MP3_MAINDATA_UNDERFLOW)\r
	52	// just need another frame\r
	53	continue;\r
	54	\r
	55	if (err == ERR_MP3_INDATA_UNDERFLOW)\r
	56	goto set_eof;\r
	57	\r
	58	if (err <= -6 && err >= -12) {\r
	59	// ERR_MP3_INVALID_FRAMEHEADER, ERR_MP3_INVALID_*\r
	60	// just try to skip the offending frame..\r
	61	readPtr++;\r
	62	bytesLeft--;\r
	63	continue;\r
	64	}\r
	65	shared_ctl->mp3_errors++;\r
	66	shared_ctl->mp3_lasterr = err;\r
51a902ae	67	}\r
7c34867a	68	break;\r
51a902ae	69	}\r
7c34867a	70	\r
51a902ae	71	set_if_not_changed(&shared_ctl->mp3_offs, mp3_offs, readPtr - mp3_data);\r
7c34867a	72	return;\r
	73	\r
	74	set_eof:\r
	75	set_if_not_changed(&shared_ctl->mp3_offs, mp3_offs, shared_ctl->mp3_len);\r
51a902ae	76	}\r
51a902ae	77	\r
e4fb433c	78	static void ym_flush_writes(void)\r
	79	{\r
	80	UINT16 *wbuff;\r
	81	int i;\r
	82	\r
	83	if (shared_ctl->writebuffsel == 1) {\r
	84	wbuff = shared_ctl->writebuff1;\r
	85	} else {\r
	86	wbuff = shared_ctl->writebuff0;\r
	87	}\r
	88	\r
	89	/* playback all writes */\r
	90	for (i = 2048; i > 0; i--) {\r
	91	UINT16 d = *wbuff++;\r
	92	if (d == 0xffff) break;\r
	93	if (d == 0xfffe) continue;\r
	94	YM2612Write_(d >> 8, d);\r
	95	}\r
	96	}\r
	97	\r
2433f409	98	static void ym_update(int *ym_buffer)\r
	99	{\r
	100	int i, dw;\r
	101	int two_upds = 0;\r
	102	UINT16 *wbuff;\r
	103	\r
	104	if (shared_ctl->writebuffsel == 1) {\r
	105	wbuff = shared_ctl->writebuff1;\r
	106	} else {\r
	107	wbuff = shared_ctl->writebuff0;\r
	108	}\r
	109	\r
	110	/* playback all writes */\r
	111	for (i = 2048/2; i > 0; i--) {\r
	112	UINT16 d;\r
	113	dw = (int )wbuff;\r
	114	d = dw;\r
	115	wbuff++;\r
	116	if (d == 0xffff) break;\r
	117	if (d == 0xfffe) { two_upds=1; break; }\r
	118	YM2612Write_(d >> 8, d);\r
	119	d = (dw>>16);\r
	120	wbuff++;\r
	121	if (d == 0xffff) break;\r
	122	if (d == 0xfffe) { two_upds=1; break; }\r
	123	YM2612Write_(d >> 8, d);\r
	124	}\r
	125	\r
e4fb433c	126	if (two_upds)\r
e4fb433c	127	{\r
2433f409	128	int len1 = shared_ctl->length / 2;\r
	129	shared_ctl->ym_active_chs =\r
	130	YM2612UpdateOne_(ym_buffer, len1, shared_ctl->stereo, 1);\r
	131	\r
	132	for (i *= 2; i > 0; i--) {\r
	133	UINT16 d = *wbuff++;\r
	134	if (d == 0xffff) break;\r
	135	YM2612Write_(d >> 8, d);\r
	136	}\r
	137	\r
	138	ym_buffer += shared_ctl->stereo ? len1*2 : len1;\r
	139	len1 = shared_ctl->length - len1;\r
	140	\r
	141	shared_ctl->ym_active_chs =\r
	142	YM2612UpdateOne_(ym_buffer, len1, shared_ctl->stereo, 1);\r
	143	} else {\r
	144	shared_ctl->ym_active_chs =\r
	145	YM2612UpdateOne_(ym_buffer, shared_ctl->length, shared_ctl->stereo, 1);\r
	146	}\r
	147	}\r
	148	\r
51a902ae	149	\r
abe0ea43	150	void Main940(void)\r
cc68a136	151	{\r
abe0ea43	152	int *ym_buffer = shared_data->ym_buffer;\r
abe0ea43	153	int job = 0;\r
cc68a136	154	ym2612_940 = &shared_data->ym2612;\r
cc68a136	155	\r
cc68a136	156	\r
abe0ea43	157	for (;;)\r
cc68a136	158	{\r
abe0ea43	159	job = wait_get_job(job);\r
	160	\r
	161	shared_ctl->lastjob = job;\r
cc68a136	162	\r
abe0ea43	163	switch (job)\r
cc68a136	164	{\r
abe0ea43	165	case JOB940_INITALL:\r
	166	/* ym2612 */\r
	167	shared_ctl->writebuff0[0] = shared_ctl->writebuff1[0] = 0xffff;\r
	168	YM2612Init_(shared_ctl->baseclock, shared_ctl->rate);\r
	169	/* Helix mp3 decoder */\r
	170	shared_data->mp3dec = MP3InitDecoder();\r
	171	break;\r
	172	\r
	173	case JOB940_INVALIDATE_DCACHE:\r
	174	drain_wb();\r
	175	dcache_clean_flush();\r
	176	break;\r
	177	\r
	178	case JOB940_YM2612RESETCHIP:\r
	179	YM2612ResetChip_();\r
	180	break;\r
	181	\r
	182	case JOB940_PICOSTATELOAD:\r
	183	YM2612PicoStateLoad_();\r
	184	break;\r
	185	\r
e4fb433c	186	case JOB940_PICOSTATESAVE2:\r
	187	YM2612PicoStateSave2(0, 0);\r
	188	_memcpy(shared_ctl->writebuff0, ym2612_940->REGS, 0x200);\r
	189	break;\r
	190	\r
	191	case JOB940_PICOSTATELOAD2_PREP:\r
	192	ym_flush_writes();\r
	193	break;\r
	194	\r
	195	case JOB940_PICOSTATELOAD2:\r
	196	_memcpy(ym2612_940->REGS, shared_ctl->writebuff0, 0x200);\r
	197	YM2612PicoStateLoad2(0, 0);\r
	198	break;\r
	199	\r
2433f409	200	case JOB940_YM2612UPDATEONE:\r
2433f409	201	ym_update(ym_buffer);\r
abe0ea43	202	break;\r
cc68a136	203	\r
abe0ea43	204	case JOB940_MP3DECODE:\r
	205	mp3_decode();\r
	206	break;\r
091facb8	207	\r
	208	case JOB940_MP3RESET:\r
	209	if (shared_data->mp3dec) MP3FreeDecoder(shared_data->mp3dec);\r
	210	shared_data->mp3dec = MP3InitDecoder();\r
	211	break;\r
abe0ea43	212	}\r
42c7b147	213	\r
42c7b147	214	shared_ctl->loopc++;\r
abe0ea43	215	dcache_clean();\r
cc68a136	216	}\r
cc68a136	217	}\r
b837b69b	218	\r