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Diffstat (limited to 'qemu/include/sysemu/device_tree.h')
| -rw-r--r-- | qemu/include/sysemu/device_tree.h | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/qemu/include/sysemu/device_tree.h b/qemu/include/sysemu/device_tree.h new file mode 100644 index 000000000..359e14304 --- /dev/null +++ b/qemu/include/sysemu/device_tree.h @@ -0,0 +1,122 @@ +/* + * 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); + +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); +const void *qemu_fdt_getprop(void *fdt, const char *node_path, + const char *property, int *lenp); +uint32_t qemu_fdt_getprop_cell(void *fdt, const char *node_path, + const char *property); +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__ */ |