sm64pc/lib/src/__osSpRawStartDma.c

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2020-05-05 12:15:53 +00:00
#include "libultra_internal.h"
#include "hardware.h"
s32 __osSpRawStartDma(u32 dir, void *sp_ptr, void *dram_ptr, size_t size) {
if (__osSpDeviceBusy()) {
return -1;
}
HW_REG(SP_MEM_ADDR_REG, void *) = sp_ptr;
HW_REG(SP_DRAM_ADDR_REG, void *) = (void *) osVirtualToPhysical(dram_ptr);
if (dir == 0) {
HW_REG(SP_WR_LEN_REG, u32) = size - 1;
} else {
HW_REG(SP_RD_LEN_REG, u32) = size - 1;
}
return 0;
}