long GPUinit(void);
long GPUshutdown(void);
void GPUwriteDataMem(uint32_t *mem, int count);
-long GPUdmaChain(uint32_t *rambase, uint32_t addr);
+long GPUdmaChain(uint32_t *rambase, uint32_t addr, uint32_t *progress_addr);
void GPUwriteData(uint32_t data);
void GPUreadDataMem(uint32_t *mem, int count);
uint32_t GPUreadData(void);