mem_init
mem_info *mem_init(const char *name, uint32 start, uint32 length, uint32 blockSize,
di->memmgr[mt_local] = mem_init("radeon local memory", 0, di->local_mem_size, 1024,
di->memmgr[mt_PCI] = mem_init("radeon PCI GART memory", 0, di->pci_gart.buffer.size, 4096,