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