sm64pc/lib/src/osEPiRawStartDma.c

25 lines
771 B
C
Raw Normal View History

2020-02-03 05:51:26 +00:00
#include "libultra_internal.h"
#include "hardware.h"
#include "new_func.h"
s32 osEPiRawStartDma(OSPiHandle *arg0, s32 dir, u32 cart_addr, void *dram_addr, u32 size) {
register int status;
status = HW_REG(PI_STATUS_REG, u32);
while (status & PI_STATUS_ERROR)
status = HW_REG(PI_STATUS_REG, u32);
HW_REG(PI_DRAM_ADDR_REG, void *) = (void *) osVirtualToPhysical(dram_addr);
HW_REG(PI_CART_ADDR_REG, void *) = (void *) (((uintptr_t) arg0->baseAddress | cart_addr) & 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;
}
return 0;
}