1 /* 2 * Taken from Linux v4.9 drivers/of/address.c 3 * 4 * Modified for U-Boot 5 * Copyright (c) 2017 Google, Inc 6 * 7 * SPDX-License-Identifier: GPL-2.0+ 8 */ 9 10 #ifndef _DM_OF_ADDR_H 11 #define _DM_OF_ADDR_H 12 13 /** 14 * of_translate_address() - translate a device-tree address to a CPU address 15 * 16 * Translate an address from the device-tree into a CPU physical address, 17 * this walks up the tree and applies the various bus mappings on the way. 18 * 19 * Note: We consider that crossing any level with #size-cells == 0 to mean 20 * that translation is impossible (that is we are not dealing with a value 21 * that can be mapped to a cpu physical address). This is not really specified 22 * that way, but this is traditionally the way IBM at least do things 23 * 24 * @np: node to check 25 * @in_addr: pointer to input address 26 * @return translated address or OF_BAD_ADDR on error 27 */ 28 u64 of_translate_address(const struct device_node *no, const __be32 *in_addr); 29 30 /** 31 * of_get_address() - obtain an address from a node 32 * 33 * Extract an address from a node, returns the region size and the address 34 * space flags too. The PCI version uses a BAR number instead of an absolute 35 * index. 36 * 37 * @np: Node to check 38 * @index: Index of address to read (0 = first) 39 * @size: place to put size on success 40 * @flags: place to put flags on success 41 * @return pointer to address which can be read 42 */ 43 const __be32 *of_get_address(const struct device_node *no, int index, 44 u64 *size, unsigned int *flags); 45 46 struct resource; 47 48 /** 49 * of_address_to_resource() - translate device tree address to resource 50 * 51 * Note that if your address is a PIO address, the conversion will fail if 52 * the physical address can't be internally converted to an IO token with 53 * pci_address_to_pio(), that is because it's either called to early or it 54 * can't be matched to any host bridge IO space 55 * 56 * @np: node to check 57 * @index: index of address to read (0 = first) 58 * @r: place to put resource information 59 * @return 0 if OK, -ve on error 60 */ 61 int of_address_to_resource(const struct device_node *no, int index, 62 struct resource *r); 63 64 #endif 65