This patch aligns the prototype with qemu_fdt_getprop. The caller can choose whether the function self-asserts on error (passing &error_fatal as Error ** argument, corresponding to the legacy behavior), or behaves differently such as simply output a message. In this later case the caller can use the new lenp parameter to interpret the error if any. Signed-off-by: Eric Auger <eric.auger@linaro.org> Reviewed-by: Peter Crosthwaite <crosthwaite.peter@gmail.com> Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
172 lines
7.4 KiB
C
172 lines
7.4 KiB
C
/*
|
|
* Header with function prototypes to help device tree manipulation using
|
|
* libfdt. It also provides functions to read entries from device tree proc
|
|
* interface.
|
|
*
|
|
* Copyright 2008 IBM Corporation.
|
|
* Authors: Jerone Young <jyoung5@us.ibm.com>
|
|
* Hollis Blanchard <hollisb@us.ibm.com>
|
|
*
|
|
* This work is licensed under the GNU GPL license version 2 or later.
|
|
*
|
|
*/
|
|
|
|
#ifndef __DEVICE_TREE_H__
|
|
#define __DEVICE_TREE_H__
|
|
|
|
void *create_device_tree(int *sizep);
|
|
void *load_device_tree(const char *filename_path, int *sizep);
|
|
#ifdef CONFIG_LINUX
|
|
/**
|
|
* load_device_tree_from_sysfs: reads the device tree information in the
|
|
* /proc/device-tree directory and return the corresponding binary blob
|
|
* buffer pointer. Asserts in case of error.
|
|
*/
|
|
void *load_device_tree_from_sysfs(void);
|
|
#endif
|
|
|
|
/**
|
|
* qemu_fdt_node_path: return the paths of nodes matching a given
|
|
* name and compat string
|
|
* @fdt: pointer to the dt blob
|
|
* @name: node name
|
|
* @compat: compatibility string
|
|
* @errp: handle to an error object
|
|
*
|
|
* returns a newly allocated NULL-terminated array of node paths.
|
|
* Use g_strfreev() to free it. If one or more nodes were found, the
|
|
* array contains the path of each node and the last element equals to
|
|
* NULL. If there is no error but no matching node was found, the
|
|
* returned array contains a single element equal to NULL. If an error
|
|
* was encountered when parsing the blob, the function returns NULL
|
|
*/
|
|
char **qemu_fdt_node_path(void *fdt, const char *name, char *compat,
|
|
Error **errp);
|
|
|
|
int qemu_fdt_setprop(void *fdt, const char *node_path,
|
|
const char *property, const void *val, int size);
|
|
int qemu_fdt_setprop_cell(void *fdt, const char *node_path,
|
|
const char *property, uint32_t val);
|
|
int qemu_fdt_setprop_u64(void *fdt, const char *node_path,
|
|
const char *property, uint64_t val);
|
|
int qemu_fdt_setprop_string(void *fdt, const char *node_path,
|
|
const char *property, const char *string);
|
|
int qemu_fdt_setprop_phandle(void *fdt, const char *node_path,
|
|
const char *property,
|
|
const char *target_node_path);
|
|
/**
|
|
* qemu_fdt_getprop: retrieve the value of a given property
|
|
* @fdt: pointer to the device tree blob
|
|
* @node_path: node path
|
|
* @property: name of the property to find
|
|
* @lenp: fdt error if any or length of the property on success
|
|
* @errp: handle to an error object
|
|
*
|
|
* returns a pointer to the property on success and NULL on failure
|
|
*/
|
|
const void *qemu_fdt_getprop(void *fdt, const char *node_path,
|
|
const char *property, int *lenp,
|
|
Error **errp);
|
|
/**
|
|
* qemu_fdt_getprop_cell: retrieve the value of a given 4 byte property
|
|
* @fdt: pointer to the device tree blob
|
|
* @node_path: node path
|
|
* @property: name of the property to find
|
|
* @lenp: fdt error if any or -EINVAL if the property size is different from
|
|
* 4 bytes, or 4 (expected length of the property) upon success.
|
|
* @errp: handle to an error object
|
|
*
|
|
* returns the property value on success
|
|
*/
|
|
uint32_t qemu_fdt_getprop_cell(void *fdt, const char *node_path,
|
|
const char *property, int *lenp,
|
|
Error **errp);
|
|
uint32_t qemu_fdt_get_phandle(void *fdt, const char *path);
|
|
uint32_t qemu_fdt_alloc_phandle(void *fdt);
|
|
int qemu_fdt_nop_node(void *fdt, const char *node_path);
|
|
int qemu_fdt_add_subnode(void *fdt, const char *name);
|
|
|
|
#define qemu_fdt_setprop_cells(fdt, node_path, property, ...) \
|
|
do { \
|
|
uint32_t qdt_tmp[] = { __VA_ARGS__ }; \
|
|
int i; \
|
|
\
|
|
for (i = 0; i < ARRAY_SIZE(qdt_tmp); i++) { \
|
|
qdt_tmp[i] = cpu_to_be32(qdt_tmp[i]); \
|
|
} \
|
|
qemu_fdt_setprop(fdt, node_path, property, qdt_tmp, \
|
|
sizeof(qdt_tmp)); \
|
|
} while (0)
|
|
|
|
void qemu_fdt_dumpdtb(void *fdt, int size);
|
|
|
|
/**
|
|
* qemu_fdt_setprop_sized_cells_from_array:
|
|
* @fdt: device tree blob
|
|
* @node_path: node to set property on
|
|
* @property: property to set
|
|
* @numvalues: number of values
|
|
* @values: array of number-of-cells, value pairs
|
|
*
|
|
* Set the specified property on the specified node in the device tree
|
|
* to be an array of cells. The values of the cells are specified via
|
|
* the values list, which alternates between "number of cells used by
|
|
* this value" and "value".
|
|
* number-of-cells must be either 1 or 2 (other values will result in
|
|
* an error being returned). If a value is too large to fit in the
|
|
* number of cells specified for it, an error is returned.
|
|
*
|
|
* This function is useful because device tree nodes often have cell arrays
|
|
* which are either lists of addresses or lists of address,size tuples, but
|
|
* the number of cells used for each element vary depending on the
|
|
* #address-cells and #size-cells properties of their parent node.
|
|
* If you know all your cell elements are one cell wide you can use the
|
|
* simpler qemu_fdt_setprop_cells(). If you're not setting up the
|
|
* array programmatically, qemu_fdt_setprop_sized_cells may be more
|
|
* convenient.
|
|
*
|
|
* Return value: 0 on success, <0 on error.
|
|
*/
|
|
int qemu_fdt_setprop_sized_cells_from_array(void *fdt,
|
|
const char *node_path,
|
|
const char *property,
|
|
int numvalues,
|
|
uint64_t *values);
|
|
|
|
/**
|
|
* qemu_fdt_setprop_sized_cells:
|
|
* @fdt: device tree blob
|
|
* @node_path: node to set property on
|
|
* @property: property to set
|
|
* @...: list of number-of-cells, value pairs
|
|
*
|
|
* Set the specified property on the specified node in the device tree
|
|
* to be an array of cells. The values of the cells are specified via
|
|
* the variable arguments, which alternates between "number of cells
|
|
* used by this value" and "value".
|
|
*
|
|
* This is a convenience wrapper for the function
|
|
* qemu_fdt_setprop_sized_cells_from_array().
|
|
*
|
|
* Return value: 0 on success, <0 on error.
|
|
*/
|
|
#define qemu_fdt_setprop_sized_cells(fdt, node_path, property, ...) \
|
|
({ \
|
|
uint64_t qdt_tmp[] = { __VA_ARGS__ }; \
|
|
qemu_fdt_setprop_sized_cells_from_array(fdt, node_path, \
|
|
property, \
|
|
ARRAY_SIZE(qdt_tmp) / 2, \
|
|
qdt_tmp); \
|
|
})
|
|
|
|
#define FDT_PCI_RANGE_RELOCATABLE 0x80000000
|
|
#define FDT_PCI_RANGE_PREFETCHABLE 0x40000000
|
|
#define FDT_PCI_RANGE_ALIASED 0x20000000
|
|
#define FDT_PCI_RANGE_TYPE_MASK 0x03000000
|
|
#define FDT_PCI_RANGE_MMIO_64BIT 0x03000000
|
|
#define FDT_PCI_RANGE_MMIO 0x02000000
|
|
#define FDT_PCI_RANGE_IOPORT 0x01000000
|
|
#define FDT_PCI_RANGE_CONFIG 0x00000000
|
|
|
|
#endif /* __DEVICE_TREE_H__ */
|