1 #ifndef __OF_RESERVED_MEM_H
2 #define __OF_RESERVED_MEM_H
4 #include <linux/device.h>
6 struct of_phandle_args;
7 struct reserved_mem_ops;
11 unsigned long fdt_node;
12 unsigned long phandle;
13 const struct reserved_mem_ops *ops;
19 struct reserved_mem_ops {
20 int (*device_init)(struct reserved_mem *rmem,
22 void (*device_release)(struct reserved_mem *rmem,
26 typedef int (*reservedmem_of_init_fn)(struct reserved_mem *rmem);
28 #define RESERVEDMEM_OF_DECLARE(name, compat, init) \
29 _OF_DECLARE(reservedmem, name, compat, init, reservedmem_of_init_fn)
31 #ifdef CONFIG_OF_RESERVED_MEM
33 int of_reserved_mem_device_init_by_idx(struct device *dev,
34 struct device_node *np, int idx);
35 void of_reserved_mem_device_release(struct device *dev);
37 int early_init_dt_alloc_reserved_memory_arch(phys_addr_t size,
42 phys_addr_t *res_base);
44 void fdt_init_reserved_mem(void);
45 void fdt_reserved_mem_save_node(unsigned long node, const char *uname,
46 phys_addr_t base, phys_addr_t size);
48 static inline int of_reserved_mem_device_init_by_idx(struct device *dev,
49 struct device_node *np, int idx)
53 static inline void of_reserved_mem_device_release(struct device *pdev) { }
55 static inline void fdt_init_reserved_mem(void) { }
56 static inline void fdt_reserved_mem_save_node(unsigned long node,
57 const char *uname, phys_addr_t base, phys_addr_t size) { }
61 * of_reserved_mem_device_init() - assign reserved memory region to given device
62 * @dev: Pointer to the device to configure
64 * This function assigns respective DMA-mapping operations based on the first
65 * reserved memory region specified by 'memory-region' property in device tree
66 * node of the given device.
68 * Returns error code or zero on success.
70 static inline int of_reserved_mem_device_init(struct device *dev)
72 return of_reserved_mem_device_init_by_idx(dev, dev->of_node, 0);
75 #endif /* __OF_RESERVED_MEM_H */