| /* |
| * 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); |
| |
| /** |
| * qemu_fdt_node_unit_path: return the paths of nodes matching a given |
| * node-name, ie. node-name and node-name@unit-address |
| * @fdt: pointer to the dt blob |
| * @name: node name |
| * @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_unit_path(void *fdt, const char *name, 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 */ |
