From 97087610a2ad11c4289d4be2bd2b49e0002a86f0 Mon Sep 17 00:00:00 2001 From: twinaphex Date: Thu, 11 Dec 2014 03:10:29 +0100 Subject: [PATCH] gba_memory.c - Turn trigger_dma into function --- gba_memory.c | 161 ++++++++++++++++++++++++--------------------------- 1 file changed, 77 insertions(+), 84 deletions(-) diff --git a/gba_memory.c b/gba_memory.c index 1860ce5..beda0df 100644 --- a/gba_memory.c +++ b/gba_memory.c @@ -729,74 +729,75 @@ u32 function_cc read_eeprom(void) break; \ } \ -#define trigger_dma(dma_number) \ - if(value & 0x8000) \ - { \ - if(dma[dma_number].start_type == DMA_INACTIVE) \ - { \ - u32 start_type = (value >> 12) & 0x03; \ - u32 dest_address = address32(io_registers, (dma_number * 12) + 0xB4) & \ - 0xFFFFFFF; \ - \ - dma[dma_number].dma_channel = dma_number; \ - dma[dma_number].source_address = \ - address32(io_registers, (dma_number * 12) + 0xB0) & 0xFFFFFFF; \ - dma[dma_number].dest_address = dest_address; \ - dma[dma_number].source_direction = (value >> 7) & 0x03; \ - dma[dma_number].repeat_type = (value >> 9) & 0x01; \ - dma[dma_number].start_type = start_type; \ - dma[dma_number].irq = (value >> 14) & 0x01; \ - \ - /* If it is sound FIFO DMA make sure the settings are a certain way */ \ - if((dma_number >= 1) && (dma_number <= 2) && \ - (start_type == DMA_START_SPECIAL)) \ - { \ - dma[dma_number].length_type = DMA_32BIT; \ - dma[dma_number].length = 4; \ - dma[dma_number].dest_direction = DMA_FIXED; \ - if(dest_address == 0x40000A4) \ - dma[dma_number].direct_sound_channel = DMA_DIRECT_SOUND_B; \ - else \ - dma[dma_number].direct_sound_channel = DMA_DIRECT_SOUND_A; \ - } \ - else \ - { \ - u32 length = \ - address16(io_registers, (dma_number * 12) + 0xB8); \ - \ - if((dma_number == 3) && ((dest_address >> 24) == 0x0D) && \ - ((length & 0x1F) == 17)) \ - { \ - eeprom_size = EEPROM_8_KBYTE; \ - } \ - \ - if(dma_number < 3) \ - length &= 0x3FFF; \ - \ - if(length == 0) \ - { \ - if(dma_number == 3) \ - length = 0x10000; \ - else \ - length = 0x04000; \ - } \ - \ - dma[dma_number].length = length; \ - dma[dma_number].length_type = (value >> 10) & 0x01; \ - dma[dma_number].dest_direction = (value >> 5) & 0x03; \ - } \ - \ - address16(io_registers, (dma_number * 12) + 0xBA) = value; \ - if(start_type == DMA_START_IMMEDIATELY) \ - return dma_transfer(dma + dma_number); \ - } \ - } \ - else \ - { \ - dma[dma_number].start_type = DMA_INACTIVE; \ - dma[dma_number].direct_sound_channel = DMA_NO_DIRECT_SOUND; \ - address16(io_registers, (dma_number * 12) + 0xBA) = value; \ - } \ +static cpu_alert_type trigger_dma(u32 dma_number, u32 value) +{ + if(value & 0x8000) + { + if(dma[dma_number].start_type == DMA_INACTIVE) + { + u32 start_type = (value >> 12) & 0x03; + u32 dest_address = address32(io_registers, (dma_number * 12) + 0xB4) & + 0xFFFFFFF; + + dma[dma_number].dma_channel = dma_number; + dma[dma_number].source_address = + address32(io_registers, (dma_number * 12) + 0xB0) & 0xFFFFFFF; + dma[dma_number].dest_address = dest_address; + dma[dma_number].source_direction = (value >> 7) & 0x03; + dma[dma_number].repeat_type = (value >> 9) & 0x01; + dma[dma_number].start_type = start_type; + dma[dma_number].irq = (value >> 14) & 0x01; + + /* If it is sound FIFO DMA make sure the settings are a certain way */ + if((dma_number >= 1) && (dma_number <= 2) && + (start_type == DMA_START_SPECIAL)) + { + dma[dma_number].length_type = DMA_32BIT; + dma[dma_number].length = 4; + dma[dma_number].dest_direction = DMA_FIXED; + if(dest_address == 0x40000A4) + dma[dma_number].direct_sound_channel = DMA_DIRECT_SOUND_B; + else + dma[dma_number].direct_sound_channel = DMA_DIRECT_SOUND_A; + } + else + { + u32 length = address16(io_registers, (dma_number * 12) + 0xB8); + + if((dma_number == 3) && ((dest_address >> 24) == 0x0D) && + ((length & 0x1F) == 17)) + eeprom_size = EEPROM_8_KBYTE; + + if(dma_number < 3) + length &= 0x3FFF; + + if(length == 0) + { + if(dma_number == 3) + length = 0x10000; + else + length = 0x04000; + } + + dma[dma_number].length = length; + dma[dma_number].length_type = (value >> 10) & 0x01; + dma[dma_number].dest_direction = (value >> 5) & 0x03; + } + + address16(io_registers, (dma_number * 12) + 0xBA) = value; + if(start_type == DMA_START_IMMEDIATELY) + return dma_transfer(dma + dma_number); + } + } + else + { + dma[dma_number].start_type = DMA_INACTIVE; + dma[dma_number].direct_sound_channel = DMA_NO_DIRECT_SOUND; + address16(io_registers, (dma_number * 12) + 0xBA) = value; + } + + return CPU_ALERT_NONE; +} #define access_register8_high(address) \ @@ -1109,23 +1110,19 @@ cpu_alert_type function_cc write_io_register8(u32 address, u32 value) // DMA control (trigger byte) case 0xBB: access_register8_low(0xBA); - trigger_dma(0); - break; + return trigger_dma(0, value); case 0xC7: access_register8_low(0xC6); - trigger_dma(1); - break; + return trigger_dma(1, value); case 0xD3: access_register8_low(0xD2); - trigger_dma(2); - break; + return trigger_dma(2, value); case 0xDF: access_register8_low(0xDE); - trigger_dma(3); - break; + return trigger_dma(3, value); // Timer counts case 0x100: @@ -1376,20 +1373,16 @@ cpu_alert_type function_cc write_io_register16(u32 address, u32 value) // DMA control case 0xBA: - trigger_dma(0); - break; + return trigger_dma(0, value); case 0xC6: - trigger_dma(1); - break; + return trigger_dma(1, value); case 0xD2: - trigger_dma(2); - break; + return trigger_dma(2, value); case 0xDE: - trigger_dma(3); - break; + return trigger_dma(3, value); // Timer counts case 0x100: