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 void *dma_window_prop, 11 unsigned long *busno, unsigned long *phys, unsigned long *size) 12 { 13 const u32 *dma_window; 14 u32 cells; 15 const unsigned char *prop; 16 17 dma_window = dma_window_prop; 18 19 /* busno is always one cell */ 20 *busno = *(dma_window++); 21 22 prop = of_get_property(dn, "ibm,#dma-address-cells", NULL); 23 if (!prop) 24 prop = of_get_property(dn, "#address-cells", NULL); 25 26 cells = prop ? *(u32 *)prop : of_n_addr_cells(dn); 27 *phys = of_read_number(dma_window, cells); 28 29 dma_window += cells; 30 31 prop = of_get_property(dn, "ibm,#dma-size-cells", NULL); 32 cells = prop ? *(u32 *)prop : of_n_size_cells(dn); 33 *size = of_read_number(dma_window, cells); 34 } 35