1 #undef DEBUG 2 3 #include <linux/kernel.h> 4 #include <linux/string.h> 5 #include <linux/ioport.h> 6 #include <linux/etherdevice.h> 7 #include <linux/of_address.h> 8 #include <asm/prom.h> 9 10 void of_parse_dma_window(struct device_node *dn, const __be32 *dma_window, 11 unsigned long *busno, unsigned long *phys, 12 unsigned long *size) 13 { 14 u32 cells; 15 const __be32 *prop; 16 17 /* busno is always one cell */ 18 *busno = of_read_number(dma_window, 1); 19 dma_window++; 20 21 prop = of_get_property(dn, "ibm,#dma-address-cells", NULL); 22 if (!prop) 23 prop = of_get_property(dn, "#address-cells", NULL); 24 25 cells = prop ? of_read_number(prop, 1) : of_n_addr_cells(dn); 26 *phys = of_read_number(dma_window, cells); 27 28 dma_window += cells; 29 30 prop = of_get_property(dn, "ibm,#dma-size-cells", NULL); 31 cells = prop ? of_read_number(prop, 1) : of_n_size_cells(dn); 32 *size = of_read_number(dma_window, cells); 33 } 34