pureikyubu/SRC/Hardware/AR.h

#pragma once

#define ARAMSIZE        (16 * 1024 * 1024)  // 16 mb
#define ARAM            aram.mem

// aram dma transfer type (CNT bit31)
#define RAM_TO_ARAM     0
#define ARAM_TO_RAM     1

// known ARAM controller registers
#define AR_SIZE             0x0C005012      // 16 bit regs
#define AR_MODE             0x0C005016
#define AR_REFRESH          0x0C00501A
#define AR_DMA_MMADDR_H     0x0C005020
#define AR_DMA_MMADDR_L     0x0C005022
#define AR_DMA_ARADDR_H     0x0C005024
#define AR_DMA_ARADDR_L     0x0C005026
#define AR_DMA_CNT_H        0x0C005028
#define AR_DMA_CNT_L        0x0C00502A
#define AR_DMA_MMADDR       0x0C005020      // 32 bit regs
#define AR_DMA_ARADDR       0x0C005024
#define AR_DMA_CNT          0x0C005028

// not sure about AR_SIZE, AR_MODE and AR_REFRESH.

// ---------------------------------------------------------------------------
// hardware API

// ARAM state (registers and other data)
struct ARControl
{
    uint8_t     *mem;                // aux. memory buffer (size is ARAMSIZE)
    volatile uint32_t    mmaddr, araddr;     // DMA address
    volatile uint32_t    cnt;                // count + transfer type (bit31)
    uint16_t    size;               // "AR_SIZE" (0x5012) register
    Thread* dmaThread;
    int64_t gekkoTicks;
    size_t gekkoTicksPerSlice;
    bool dspRunningBeforeAramDma;
    bool log;
};

void    AROpen();
void    ARClose();

extern  ARControl aram;