Shipwright/soh/src/libultra/io/pirawdma.c

27 lines
710 B
C
Raw Normal View History

#include "global.h"
s32 __osPiRawStartDma(s32 dir, u32 cartAddr, void* dramAddr, size_t size) {
register s32 status = HW_REG(PI_STATUS_REG, u32);
while (status & (PI_STATUS_BUSY | PI_STATUS_IOBUSY)) {
status = HW_REG(PI_STATUS_REG, u32);
}
HW_REG(PI_DRAM_ADDR_REG, void*) = (void*)osVirtualToPhysical(dramAddr);
HW_REG(PI_CART_ADDR_REG, void*) = (void*)((osRomBase | cartAddr) & 0x1FFFFFFF);
switch (dir) {
case OS_READ:
HW_REG(PI_WR_LEN_REG, u32) = size - 1;
break;
case OS_WRITE:
HW_REG(PI_RD_LEN_REG, u32) = size - 1;
break;
default:
return -1;
break;
}
return 0;
}