1 #ifndef __OF_RESERVED_MEM_H 2 #define __OF_RESERVED_MEM_H 3 4 #include <linux/device.h> 5 6 struct of_phandle_args; 7 struct reserved_mem_ops; 8 9 struct reserved_mem { 10 const char *name; 11 unsigned long fdt_node; 12 unsigned long phandle; 13 const struct reserved_mem_ops *ops; 14 phys_addr_t base; 15 phys_addr_t size; 16 void *priv; 17 }; 18 19 struct reserved_mem_ops { 20 int (*device_init)(struct reserved_mem *rmem, 21 struct device *dev); 22 void (*device_release)(struct reserved_mem *rmem, 23 struct device *dev); 24 }; 25 26 typedef int (*reservedmem_of_init_fn)(struct reserved_mem *rmem); 27 28 #define RESERVEDMEM_OF_DECLARE(name, compat, init) \ 29 _OF_DECLARE(reservedmem, name, compat, init, reservedmem_of_init_fn) 30 31 #ifdef CONFIG_OF_RESERVED_MEM 32 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); 36 37 int early_init_dt_alloc_reserved_memory_arch(phys_addr_t size, 38 phys_addr_t align, 39 phys_addr_t start, 40 phys_addr_t end, 41 bool nomap, 42 phys_addr_t *res_base); 43 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); 47 #else 48 static inline int of_reserved_mem_device_init_by_idx(struct device *dev, 49 struct device_node *np, int idx) 50 { 51 return -ENOSYS; 52 } 53 static inline void of_reserved_mem_device_release(struct device *pdev) { } 54 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) { } 58 #endif 59 60 /** 61 * of_reserved_mem_device_init() - assign reserved memory region to given device 62 * @dev: Pointer to the device to configure 63 * 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. 67 * 68 * Returns error code or zero on success. 69 */ 70 static inline int of_reserved_mem_device_init(struct device *dev) 71 { 72 return of_reserved_mem_device_init_by_idx(dev, dev->of_node, 0); 73 } 74 75 #endif /* __OF_RESERVED_MEM_H */ 76