1 /* SPDX-License-Identifier: GPL-2.0+ */
7 #ifndef __FDT_SUPPORT_H
8 #define __FDT_SUPPORT_H
10 #if !defined(USE_HOSTCC)
12 #include <asm/u-boot.h>
13 #include <linux/libfdt.h>
17 * arch_fixup_fdt() - Write arch-specific information to fdt
19 * Defined in arch/$(ARCH)/lib/bootm-fdt.c
21 * @blob: FDT blob to write to
22 * Return: 0 if ok, or -ve FDT_ERR_... on failure
24 int arch_fixup_fdt(void *blob);
26 void ft_cpu_setup(void *blob, struct bd_info *bd);
28 void ft_pci_setup(void *blob, struct bd_info *bd);
30 u32 fdt_getprop_u32_default_node(const void *fdt, int off, int cell,
31 const char *prop, const u32 dflt);
32 u32 fdt_getprop_u32_default(const void *fdt, const char *path,
33 const char *prop, const u32 dflt);
36 * Add data to the root of the FDT before booting the OS.
38 * See doc/device-tree-bindings/root.txt
40 * @param fdt FDT address in memory
41 * Return: 0 if ok, or -FDT_ERR_... on error
43 int fdt_root(void *fdt);
46 * Add chosen data the FDT before booting the OS.
48 * In particular, this adds the kernel command line (bootargs) to the FDT.
50 * @param fdt FDT address in memory
51 * Return: 0 if ok, or -FDT_ERR_... on error
53 int fdt_chosen(void *fdt);
56 * Add initrd information to the FDT before booting the OS.
58 * Adds linux,initrd-start and linux,initrd-end properties to the /chosen node,
59 * creating it if necessary.
61 * A memory reservation for the ramdisk is added to the FDT, or an existing one
62 * (with matching @initrd_start) updated.
64 * If @initrd_start == @initrd_end this function does nothing and returns 0.
66 * @fdt: Pointer to FDT in memory
67 * @initrd_start: Start of ramdisk
68 * @initrd_end: End of ramdisk
69 * Return: 0 if ok, or -FDT_ERR_... on error
71 int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end);
73 void do_fixup_by_path(void *fdt, const char *path, const char *prop,
74 const void *val, int len, int create);
75 void do_fixup_by_path_u32(void *fdt, const char *path, const char *prop,
78 static inline void do_fixup_by_path_string(void *fdt, const char *path,
79 const char *prop, const char *status)
81 do_fixup_by_path(fdt, path, prop, status, strlen(status) + 1, 1);
84 void do_fixup_by_prop(void *fdt,
85 const char *pname, const void *pval, int plen,
86 const char *prop, const void *val, int len,
88 void do_fixup_by_prop_u32(void *fdt,
89 const char *pname, const void *pval, int plen,
90 const char *prop, u32 val, int create);
91 void do_fixup_by_compat(void *fdt, const char *compat,
92 const char *prop, const void *val, int len, int create);
93 void do_fixup_by_compat_u32(void *fdt, const char *compat,
94 const char *prop, u32 val, int create);
96 * Setup the memory node in the DT. Creates one if none was existing before.
97 * Calls fdt_fixup_memory_banks() to populate a single reg pair covering the
100 * @param blob FDT blob to update
101 * @param start Begin of DRAM mapping in physical memory
102 * @param size Size of the single memory bank
103 * Return: 0 if ok, or -1 or -FDT_ERR_... on error
105 int fdt_fixup_memory(void *blob, u64 start, u64 size);
108 * Fill the DT memory node with multiple memory banks.
109 * Creates the node if none was existing before.
110 * If banks is 0, it will not touch the existing reg property. This allows
111 * boards to not mess with the existing DT setup, which may have been
112 * filled in properly before.
114 * @param blob FDT blob to update
115 * @param start Array of size <banks> to hold the start addresses.
116 * @param size Array of size <banks> to hold the size of each region.
117 * @param banks Number of memory banks to create. If 0, the reg
118 * property will be left untouched.
119 * Return: 0 if ok, or -1 or -FDT_ERR_... on error
121 #ifdef CONFIG_ARCH_FIXUP_FDT_MEMORY
122 int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks);
123 int fdt_set_usable_memory(void *blob, u64 start[], u64 size[], int banks);
125 static inline int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[],
132 void fdt_fixup_ethernet(void *fdt);
133 int fdt_find_and_setprop(void *fdt, const char *node, const char *prop,
134 const void *val, int len, int create);
135 void fdt_fixup_qe_firmware(void *fdt);
138 * Update native-mode property of display-timings node to the phandle
139 * of the timings matching a display by name (case insensitive).
141 * see kernel Documentation/devicetree/bindings/video/display-timing.txt
143 * @param blob FDT blob to update
144 * @param path path within dt
145 * @param display name of display timing to match
146 * Return: 0 if ok, or -FDT_ERR_... on error
148 int fdt_fixup_display(void *blob, const char *path, const char *display);
150 #if defined(CONFIG_USB_EHCI_FSL) || defined(CONFIG_USB_XHCI_FSL)
151 void fsl_fdt_fixup_dr_usb(void *blob, struct bd_info *bd);
153 static inline void fsl_fdt_fixup_dr_usb(void *blob, struct bd_info *bd) {}
154 #endif /* defined(CONFIG_USB_EHCI_FSL) || defined(CONFIG_USB_XHCI_FSL) */
156 #if defined(CONFIG_SYS_FSL_SEC_COMPAT)
157 void fdt_fixup_crypto_node(void *blob, int sec_rev);
159 static inline void fdt_fixup_crypto_node(void *blob, int sec_rev) {}
163 * Record information about a processed loadable in /fit-images (creating
164 * /fit-images if necessary).
166 * @param blob FDT blob to update
167 * @param index index of this loadable
168 * @param name name of the loadable
169 * @param load_addr address the loadable was loaded to
170 * @param size number of bytes loaded
171 * @param entry_point entry point (if specified, otherwise pass -1)
172 * @param type type (if specified, otherwise pass NULL)
173 * @param os os-type (if specified, otherwise pass NULL)
174 * @param arch architecture (if specified, otherwise pass NULL)
175 * Return: 0 if ok, or -1 or -FDT_ERR_... on error
177 int fdt_record_loadable(void *blob, u32 index, const char *name,
178 uintptr_t load_addr, u32 size, uintptr_t entry_point,
179 const char *type, const char *os, const char *arch);
183 int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose);
186 int fdt_find_or_add_subnode(void *fdt, int parentoffset, const char *name);
189 * Add board-specific data to the FDT before booting the OS.
191 * Use CONFIG_SYS_FDT_PAD to ensure there is sufficient space.
192 * This function is called if CONFIG_OF_BOARD_SETUP is defined
194 * @param blob FDT blob to update
195 * @param bd Pointer to board data
196 * Return: 0 if ok, or -FDT_ERR_... on error
198 int ft_board_setup(void *blob, struct bd_info *bd);
201 * board_rng_seed() - Provide a seed to be passed via /chosen/rng-seed
203 * This function is called if CONFIG_BOARD_RNG_SEED is set, and must
204 * be provided by the board. It should return, via @buf, some suitable
205 * seed value to pass to the kernel. Seed size could be set in a decimal
206 * environment variable rng_seed_size and it defaults to 64 bytes.
208 * @param buf A struct abuf for returning the seed and its size.
209 * @return 0 if ok, negative on error.
211 int board_rng_seed(struct abuf *buf);
214 * board_fdt_chosen_bootargs() - Arbitrarily amend fdt kernel command line
216 * This is used for late modification of kernel command line arguments just
217 * before they are added into the /chosen node in flat device tree.
219 * @return: pointer to kernel command line arguments in memory
221 char *board_fdt_chosen_bootargs(void);
224 * The keystone2 SOC requires all 32 bit aliased addresses to be converted
225 * to their 36 physical format. This has to happen after all fdt nodes
226 * are added or modified by the image_setup_libfdt(). The ft_board_setup_ex()
227 * called at the end of the image_setup_libfdt() is to do that convertion.
229 void ft_board_setup_ex(void *blob, struct bd_info *bd);
232 * Add system-specific data to the FDT before booting the OS.
234 * Use CONFIG_SYS_FDT_PAD to ensure there is sufficient space.
235 * This function is called if CONFIG_OF_SYSTEM_SETUP is defined
237 * @param blob FDT blob to update
238 * @param bd Pointer to board data
239 * Return: 0 if ok, or -FDT_ERR_... on error
241 int ft_system_setup(void *blob, struct bd_info *bd);
243 void set_working_fdt_addr(ulong addr);
246 * fdt_shrink_to_minimum() - shrink FDT while allowing for some margin
248 * Shrink down the given blob to 'minimum' size + some extrasize.
250 * The new size is enough to hold the existing contents plus @extrasize bytes,
251 * plus 5 memory reservations. Also, the end of the FDT is aligned to a 4KB
252 * boundary, so it might end up up to 4KB larger than needed.
254 * If there is an existing memory reservation for @blob in the FDT, it is
255 * updated for the new size.
257 * @param blob FDT blob to update
258 * @param extrasize additional bytes needed
259 * Return: 0 if ok, or -FDT_ERR_... on error
261 int fdt_shrink_to_minimum(void *blob, uint extrasize);
263 int fdt_increase_size(void *fdt, int add_len);
265 int fdt_delete_disabled_nodes(void *blob);
268 #if defined(CONFIG_FDT_FIXUP_PARTITIONS)
269 void fdt_fixup_mtdparts(void *fdt, const struct node_info *node_info,
272 static inline void fdt_fixup_mtdparts(void *fdt,
273 const struct node_info *node_info,
280 * copy the fixed-partition nodes from U-Boot device tree to external blob
282 * @param blob FDT blob to update
283 * Return: 0 if ok, or non-zero on error
285 int fdt_copy_fixed_partitions(void *blob);
287 void fdt_del_node_and_alias(void *blob, const char *alias);
290 * Translate an address from the DT into a CPU physical address
292 * The translation relies on the "ranges" property.
294 * @param blob Pointer to device tree blob
295 * @param node_offset Node DT offset
296 * @param in_addr Pointer to the address to translate
297 * Return: translated address or OF_BAD_ADDR on error
299 u64 fdt_translate_address(const void *blob, int node_offset,
300 const __be32 *in_addr);
302 * Translate a DMA address from the DT into a CPU physical address
304 * The translation relies on the "dma-ranges" property.
306 * @param blob Pointer to device tree blob
307 * @param node_offset Node DT offset
308 * @param in_addr Pointer to the DMA address to translate
309 * Return: translated DMA address or OF_BAD_ADDR on error
311 u64 fdt_translate_dma_address(const void *blob, int node_offset,
312 const __be32 *in_addr);
315 * Get DMA ranges for a specifc node, this is useful to perform bus->cpu and
316 * cpu->bus address translations
318 * @param blob Pointer to device tree blob
319 * @param node_offset Node DT offset
320 * @param cpu Pointer to variable storing the range's cpu address
321 * @param bus Pointer to variable storing the range's bus address
322 * @param size Pointer to variable storing the range's size
323 * Return: translated DMA address or OF_BAD_ADDR on error
325 int fdt_get_dma_range(const void *blob, int node_offset, phys_addr_t *cpu,
326 dma_addr_t *bus, u64 *size);
328 int fdt_node_offset_by_compat_reg(void *blob, const char *compat,
329 phys_addr_t compat_off);
330 int fdt_node_offset_by_pathf(void *blob, const char *fmt, ...)
331 __attribute__ ((format (printf, 2, 3)));
333 #define fdt_for_each_node_by_compatible(node, fdt, start, compat) \
334 for (node = fdt_node_offset_by_compatible(fdt, start, compat); \
336 node = fdt_node_offset_by_compatible(fdt, node, compat))
338 int fdt_set_phandle(void *fdt, int nodeoffset, uint32_t phandle);
339 unsigned int fdt_create_phandle(void *fdt, int nodeoffset);
340 unsigned int fdt_create_phandle_by_compatible(void *fdt, const char *compat);
341 unsigned int fdt_create_phandle_by_pathf(void *fdt, const char *fmt, ...)
342 __attribute__ ((format (printf, 2, 3)));
343 int fdt_add_edid(void *blob, const char *compat, unsigned char *buf);
345 int fdt_verify_alias_address(void *fdt, int anode, const char *alias,
347 u64 fdt_get_base_address(const void *fdt, int node);
348 int fdt_read_range(void *fdt, int node, int n, uint64_t *child_addr,
349 uint64_t *addr, uint64_t *len);
356 int fdt_set_node_status(void *fdt, int nodeoffset, enum fdt_status status);
357 static inline int fdt_status_okay(void *fdt, int nodeoffset)
359 return fdt_set_node_status(fdt, nodeoffset, FDT_STATUS_OKAY);
361 static inline int fdt_status_disabled(void *fdt, int nodeoffset)
363 return fdt_set_node_status(fdt, nodeoffset, FDT_STATUS_DISABLED);
365 static inline int fdt_status_fail(void *fdt, int nodeoffset)
367 return fdt_set_node_status(fdt, nodeoffset, FDT_STATUS_FAIL);
370 int fdt_set_status_by_alias(void *fdt, const char *alias,
371 enum fdt_status status);
372 static inline int fdt_status_okay_by_alias(void *fdt, const char *alias)
374 return fdt_set_status_by_alias(fdt, alias, FDT_STATUS_OKAY);
376 static inline int fdt_status_disabled_by_alias(void *fdt, const char *alias)
378 return fdt_set_status_by_alias(fdt, alias, FDT_STATUS_DISABLED);
380 static inline int fdt_status_fail_by_alias(void *fdt, const char *alias)
382 return fdt_set_status_by_alias(fdt, alias, FDT_STATUS_FAIL);
385 int fdt_set_status_by_compatible(void *fdt, const char *compat,
386 enum fdt_status status);
387 static inline int fdt_status_okay_by_compatible(void *fdt, const char *compat)
389 return fdt_set_status_by_compatible(fdt, compat, FDT_STATUS_OKAY);
391 static inline int fdt_status_disabled_by_compatible(void *fdt,
394 return fdt_set_status_by_compatible(fdt, compat, FDT_STATUS_DISABLED);
396 static inline int fdt_status_fail_by_compatible(void *fdt, const char *compat)
398 return fdt_set_status_by_compatible(fdt, compat, FDT_STATUS_FAIL);
401 int fdt_set_status_by_pathf(void *fdt, enum fdt_status status, const char *fmt,
402 ...) __attribute__ ((format (printf, 3, 4)));
403 #define fdt_status_okay_by_pathf(fdt, fmt, ...) \
404 fdt_set_status_by_pathf((fdt), FDT_STATUS_OKAY, (fmt), ##__VA_ARGS__)
405 #define fdt_status_disabled_by_pathf(fdt, fmt, ...) \
406 fdt_set_status_by_pathf((fdt), FDT_STATUS_DISABLED, (fmt), ##__VA_ARGS__)
407 #define fdt_status_fail_by_pathf(fdt, fmt, ...) \
408 fdt_set_status_by_pathf((fdt), FDT_STATUS_FAIL, (fmt), ##__VA_ARGS__)
410 /* Helper to read a big number; size is in cells (not bytes) */
411 static inline u64 fdt_read_number(const fdt32_t *cell, int size)
415 r = (r << 32) | fdt32_to_cpu(*(cell++));
419 void fdt_support_default_count_cells(const void *blob, int parentoffset,
420 int *addrc, int *sizec);
421 int ft_verify_fdt(void *fdt);
422 int arch_fixup_memory_node(void *blob);
424 int fdt_setup_simplefb_node(void *fdt, int node, u64 base_address, u32 width,
425 u32 height, u32 stride, const char *format);
427 int fdt_add_fb_mem_rsv(void *blob);
429 int fdt_overlay_apply_verbose(void *fdt, void *fdto);
431 int fdt_valid(struct fdt_header **blobp);
434 * fdt_get_cells_len() - Get the length of a type of cell in top-level nodes
436 * Returns the length of the cell type in bytes (4 or 8).
438 * @blob: Pointer to device tree blob
439 * @nr_cells_name: Name to lookup, e.g. "#address-cells"
441 int fdt_get_cells_len(const void *blob, char *nr_cells_name);
443 #endif /* !USE_HOSTCC */
446 int fdtdec_get_int(const void *blob, int node, const char *prop_name,
450 * Count child nodes of one parent node.
452 * @param blob FDT blob
453 * @param node parent node
454 * Return: number of child node; 0 if there is not child node
456 int fdtdec_get_child_count(const void *blob, int node);
458 #ifdef CONFIG_FMAN_ENET
459 int fdt_update_ethernet_dt(void *blob);
461 #ifdef CONFIG_FSL_MC_ENET
462 void fdt_fixup_board_enet(void *blob);
464 #ifdef CONFIG_CMD_PSTORE
465 void fdt_fixup_pstore(void *blob);
469 * fdt_kaslrseed() - create a 'kaslr-seed' node in chosen
472 * @overwrite: do not overwrite existing non-zero node unless true
473 * Return: 0 if OK, -ve on error
475 int fdt_kaslrseed(void *blob, bool overwrite);
477 #endif /* ifndef __FDT_SUPPORT_H */