mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-17 10:18:38 +00:00
65 lines
2 KiB
C
65 lines
2 KiB
C
|
/*
|
||
|
|
* Taken from Linux v4.9 drivers/of/address.c
|
||
|
|
*
|
||
|
|
* Modified for U-Boot
|
||
|
|
* Copyright (c) 2017 Google, Inc
|
||
|
|
*
|
||
|
|
* SPDX-License-Identifier: GPL-2.0+
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef _DM_OF_ADDR_H
|
||
|
|
#define _DM_OF_ADDR_H
|
||
|
|
|
||
|
|
/**
|
||
|
|
* of_translate_address() - translate a device-tree address to a CPU address
|
||
|
|
*
|
||
|
|
* Translate an address from the device-tree into a CPU physical address,
|
||
|
|
* this walks up the tree and applies the various bus mappings on the way.
|
||
|
|
*
|
||
|
|
* Note: We consider that crossing any level with #size-cells == 0 to mean
|
||
|
|
* that translation is impossible (that is we are not dealing with a value
|
||
|
|
* that can be mapped to a cpu physical address). This is not really specified
|
||
|
|
* that way, but this is traditionally the way IBM at least do things
|
||
|
|
*
|
||
|
|
* @np: node to check
|
||
|
|
* @in_addr: pointer to input address
|
||
|
|
* @return translated address or OF_BAD_ADDR on error
|
||
|
|
*/
|
||
|
|
u64 of_translate_address(const struct device_node *no, const __be32 *in_addr);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* of_get_address() - obtain an address from a node
|
||
|
|
*
|
||
|
|
* Extract an address from a node, returns the region size and the address
|
||
|
|
* space flags too. The PCI version uses a BAR number instead of an absolute
|
||
|
|
* index.
|
||
|
|
*
|
||
|
|
* @np: Node to check
|
||
|
|
* @index: Index of address to read (0 = first)
|
||
|
|
* @size: place to put size on success
|
||
|
|
* @flags: place to put flags on success
|
||
|
|
* @return pointer to address which can be read
|
||
|
|
*/
|
||
|
|
const __be32 *of_get_address(const struct device_node *no, int index,
|
||
|
|
u64 *size, unsigned int *flags);
|
||
|
|
|
||
|
|
struct resource;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* of_address_to_resource() - translate device tree address to resource
|
||
|
|
*
|
||
|
|
* Note that if your address is a PIO address, the conversion will fail if
|
||
|
|
* the physical address can't be internally converted to an IO token with
|
||
|
|
* pci_address_to_pio(), that is because it's either called to early or it
|
||
|
|
* can't be matched to any host bridge IO space
|
||
|
|
*
|
||
|
|
* @np: node to check
|
||
|
|
* @index: index of address to read (0 = first)
|
||
|
|
* @r: place to put resource information
|
||
|
|
* @return 0 if OK, -ve on error
|
||
|
|
*/
|
||
|
|
int of_address_to_resource(const struct device_node *no, int index,
|
||
|
|
struct resource *r);
|
||
|
|
|
||
|
|
#endif
|