#undef DEBUG #include <linux/kernel.h> #include <linux/string.h> #include <linux/module.h> #include <linux/ioport.h> #include <linux/etherdevice.h> #include <linux/of_address.h> #include <asm/prom.h> void of_parse_dma_window(struct device_node *dn, const void *dma_window_prop, unsigned long *busno, unsigned long *phys, unsigned long *size) { const u32 *dma_window; u32 cells; const unsigned char *prop; dma_window = dma_window_prop; /* busno is always one cell */ *busno = *(dma_window++); prop = of_get_property(dn, "ibm,#dma-address-cells", NULL); if (!prop) prop = of_get_property(dn, "#address-cells", NULL); cells = prop ? *(u32 *)prop : of_n_addr_cells(dn); *phys = of_read_number(dma_window, cells); dma_window += cells; prop = of_get_property(dn, "ibm,#dma-size-cells", NULL); cells = prop ? *(u32 *)prop : of_n_size_cells(dn); *size = of_read_number(dma_window, cells); }