| 1 | #include "940shared.h"\r |
| 2 | \r |
| 3 | /* this code assumes that we live @ 0x3000000 bank */\r |
| 4 | //static volatile unsigned short *gp2x_memregs = (void *) 0x0xbd000000;\r |
| 5 | //static volatile unsigned long *gp2x_memregl = (void *) 0x0xbd000000;\r |
| 6 | \r |
| 7 | static _940_data_t *shared_data = (_940_data_t *) 0x100000;\r |
| 8 | static _940_ctl_t *shared_ctl = (_940_ctl_t *) 0x200000;\r |
| 9 | YM2612 *ym2612_940;\r |
| 10 | int *mix_buffer;\r |
| 11 | \r |
| 12 | // from init.s\r |
| 13 | void wait_irq(void);\r |
| 14 | void spend_cycles(int c);\r |
| 15 | void cache_clean(void);\r |
| 16 | void cache_clean_flush(void);\r |
| 17 | \r |
| 18 | // asm volatile ("mov r0, #0" ::: "r0");\r |
| 19 | // asm volatile ("mcr p15, 0, r0, c7, c6, 0" ::: "r0"); /* flush dcache */\r |
| 20 | // asm volatile ("mcr p15, 0, r0, c7, c10, 4" ::: "r0"); /* drain write buffer */\r |
| 21 | \r |
| 22 | void Main940(int startvector)\r |
| 23 | {\r |
| 24 | ym2612_940 = &shared_data->ym2612;\r |
| 25 | mix_buffer = shared_data->mix_buffer;\r |
| 26 | \r |
| 27 | // debug\r |
| 28 | shared_ctl->vstarts[startvector]++;\r |
| 29 | asm volatile ("mcr p15, 0, r0, c7, c10, 4" ::: "r0");\r |
| 30 | \r |
| 31 | /* unmask IRQs */\r |
| 32 | \r |
| 33 | for (;; shared_ctl->loopc++)\r |
| 34 | {\r |
| 35 | /*\r |
| 36 | while (!shared_ctl->busy)\r |
| 37 | {\r |
| 38 | //shared_ctl->waitc++;\r |
| 39 | spend_cycles(256);\r |
| 40 | }\r |
| 41 | */\r |
| 42 | if (!shared_ctl->busy)\r |
| 43 | {\r |
| 44 | wait_irq();\r |
| 45 | }\r |
| 46 | \r |
| 47 | switch (shared_ctl->job)\r |
| 48 | {\r |
| 49 | case JOB940_YM2612INIT:\r |
| 50 | shared_ctl->writebuff0[0] = shared_ctl->writebuff1[0] = 0xffff;\r |
| 51 | YM2612Init_(shared_ctl->baseclock, shared_ctl->rate);\r |
| 52 | break;\r |
| 53 | \r |
| 54 | case JOB940_YM2612RESETCHIP:\r |
| 55 | YM2612ResetChip_();\r |
| 56 | break;\r |
| 57 | \r |
| 58 | case JOB940_PICOSTATELOAD:\r |
| 59 | YM2612PicoStateLoad_();\r |
| 60 | break;\r |
| 61 | \r |
| 62 | case JOB940_YM2612UPDATEONE: {\r |
| 63 | int i, dw, *wbuff;\r |
| 64 | if (shared_ctl->writebuffsel == 1) {\r |
| 65 | wbuff = (int *) shared_ctl->writebuff1;\r |
| 66 | } else {\r |
| 67 | wbuff = (int *) shared_ctl->writebuff0;\r |
| 68 | }\r |
| 69 | \r |
| 70 | /* playback all writes */\r |
| 71 | for (i = 2048/2; i > 0; i--) {\r |
| 72 | UINT16 d;\r |
| 73 | dw = *wbuff++;\r |
| 74 | d = dw;\r |
| 75 | if (d == 0xffff) break;\r |
| 76 | YM2612Write_(d >> 8, d);\r |
| 77 | d = (dw>>16);\r |
| 78 | if (d == 0xffff) break;\r |
| 79 | YM2612Write_(d >> 8, d);\r |
| 80 | }\r |
| 81 | \r |
| 82 | YM2612UpdateOne_(0, shared_ctl->length, shared_ctl->stereo);\r |
| 83 | // cache_clean_flush();\r |
| 84 | cache_clean();\r |
| 85 | // asm volatile ("mov r0, #0" ::: "r0");\r |
| 86 | // asm volatile ("mcr p15, 0, r0, c7, c10, 4" ::: "r0"); /* drain write buffer, should be done on nonbuffered write */\r |
| 87 | break;\r |
| 88 | }\r |
| 89 | }\r |
| 90 | \r |
| 91 | shared_ctl->busy = 0;\r |
| 92 | }\r |
| 93 | }\r |