void __init plat_swiotlb_setup(void)
{
int i;
phys_t max_addr;
phys_t addr_size;
size_t swiotlbsize;
max_addr = 0;
addr_size = 0;
if(!dma64_supported) {
loongson_linear_dma_map_ops.phys_to_dma = mips_unity_phys_to_dma32;
loongson_linear_dma_map_ops.dma_to_phys = mips_unity_dma_to_phys32;
pr_info("swiotlb:restricted 32bit dma!\n");
}
for (i = 0 ; i < boot_mem_map.nr_map; i++) {
struct boot_mem_map_entry *e = &boot_mem_map.map[i];
if (e->type != BOOT_MEM_RAM)
continue;
/* These addresses map low for PCI. */
if (e->addr > 0x410000000ull)
continue;
addr_size += e->size;
if (max_addr < e->addr + e->size)
max_addr = e->addr + e->size;
}
swiotlbsize = 64 * (1<<20);
printk("SWIOTLB: swiotlbsize = 0x%lx\n", swiotlbsize);
swiotlb_init_with_default_size(swiotlbsize, 1);
mips_dma_map_ops = &loongson_linear_dma_map_ops;
}
void __init arm64_swiotlb_init(size_t max_size)
{
dma_ops = &arm64_swiotlb_dma_ops;
swiotlb_init_with_default_size(min((size_t)SZ_64M, max_size), 1);
}
