内核版本2.6.34.6
/* Callbacks for bus specific translators */
50struct of_bus {
51 const char *name;
52 const char *addresses;
53 int (*match)(struct device_node *parent);
54 void (*count_cells)(struct device_node *child,
55 int *addrc, int *sizec);
56 u64 (*map)(u32 *addr, const u32 *range,
57 int na, int ns, int pna);
58 int (*translate)(u32 *addr, u64 offset, int na);
59 unsigned int (*get_flags)(const u32 *addr);
60};
一直奇怪addresses是啥，网上也没有对这个机构的介绍，今天递归查找别的函数的时候，偶然看到内核有
373 * Array of bus specific translators
374 */
375
376static struct of_bus of_busses[] = {
377#ifdef CONFIG_PCI
378 /* PCI */
379 {
380 .name = "pci",
381 .addresses = "assigned-addresses",
382 .match = of_bus_pci_match,
383 .count_cells = of_bus_pci_count_cells,
384 .map = of_bus_pci_map,
385 .translate = of_bus_pci_translate,
386 .get_flags = of_bus_pci_get_flags,
387 },
388#endif /* CONFIG_PCI */
389 /* ISA */
390 {
391 .name = "isa",
392 .addresses = "reg",
393 .match = of_bus_isa_match,
394 .count_cells = of_bus_isa_count_cells,
395 .map = of_bus_isa_map,
396 .translate = of_bus_isa_translate,
397 .get_flags = of_bus_isa_get_flags,
398 },
399 /* Default */
400 {
401 .name = "default",
402 .addresses = "reg",
403 .match = NULL,
404 .count_cells = of_bus_default_count_cells,
405 .map = of_bus_default_map,
406 .translate = of_bus_default_translate,
407 .get_flags = of_bus_default_get_flags,
408 },
409};
懂了...
正在整理函数of_address_to_resource的原理。等整理清楚了会贴上了，希望能整理清楚