Grant Likely | d8678b5 | 2009-10-15 10:57:53 -0600 | [diff] [blame] | 1 | /* |
| 2 | * Definitions for working with the Flattened Device Tree data format |
| 3 | * |
| 4 | * Copyright 2009 Benjamin Herrenschmidt, IBM Corp |
| 5 | * benh@kernel.crashing.org |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU General Public License |
| 9 | * version 2 as published by the Free Software Foundation. |
| 10 | */ |
| 11 | |
| 12 | #ifndef _LINUX_OF_FDT_H |
| 13 | #define _LINUX_OF_FDT_H |
| 14 | |
Grant Likely | 8482f56 | 2009-10-15 10:58:04 -0600 | [diff] [blame] | 15 | #include <linux/types.h> |
| 16 | #include <linux/init.h> |
| 17 | |
Grant Likely | d8678b5 | 2009-10-15 10:57:53 -0600 | [diff] [blame] | 18 | /* Definitions used by the flattened device tree */ |
| 19 | #define OF_DT_HEADER 0xd00dfeed /* marker */ |
Grant Likely | d8678b5 | 2009-10-15 10:57:53 -0600 | [diff] [blame] | 20 | |
Grant Likely | d45d94f | 2009-10-15 10:57:55 -0600 | [diff] [blame] | 21 | #ifndef __ASSEMBLY__ |
Grant Likely | d45d94f | 2009-10-15 10:57:55 -0600 | [diff] [blame] | 22 | |
Grant Likely | cf32eb8 | 2010-04-13 16:12:25 -0700 | [diff] [blame] | 23 | #if defined(CONFIG_OF_FLATTREE) |
Stephen Neuendorffer | 9706a36 | 2010-11-18 15:54:59 -0800 | [diff] [blame] | 24 | |
Grant Likely | a081748 | 2011-01-08 21:42:42 -0700 | [diff] [blame] | 25 | struct device_node; |
| 26 | |
Stephen Neuendorffer | 9706a36 | 2010-11-18 15:54:59 -0800 | [diff] [blame] | 27 | /* For scanning an arbitrary device-tree at any time */ |
Rob Herring | c972de1 | 2014-04-01 22:48:01 -0500 | [diff] [blame] | 28 | extern char *of_fdt_get_string(const void *blob, u32 offset); |
| 29 | extern void *of_fdt_get_property(const void *blob, |
Stephen Neuendorffer | 9706a36 | 2010-11-18 15:54:59 -0800 | [diff] [blame] | 30 | unsigned long node, |
| 31 | const char *name, |
Rob Herring | 9d0c4df | 2014-04-01 23:49:03 -0500 | [diff] [blame] | 32 | int *size); |
Rob Herring | c972de1 | 2014-04-01 22:48:01 -0500 | [diff] [blame] | 33 | extern int of_fdt_is_compatible(const void *blob, |
Stephen Neuendorffer | 9706a36 | 2010-11-18 15:54:59 -0800 | [diff] [blame] | 34 | unsigned long node, |
| 35 | const char *compat); |
Kevin Cernekee | cc78378 | 2015-04-09 13:05:15 -0700 | [diff] [blame] | 36 | extern bool of_fdt_is_big_endian(const void *blob, |
| 37 | unsigned long node); |
Rob Herring | c972de1 | 2014-04-01 22:48:01 -0500 | [diff] [blame] | 38 | extern int of_fdt_match(const void *blob, unsigned long node, |
Uwe Kleine-König | 7b482c8 | 2011-12-20 22:56:45 +0100 | [diff] [blame] | 39 | const char *const *compat); |
Stephen Neuendorffer | fe14042 | 2010-11-18 15:55:02 -0800 | [diff] [blame] | 40 | extern void of_fdt_unflatten_tree(unsigned long *blob, |
| 41 | struct device_node **mynodes); |
Stephen Neuendorffer | 9706a36 | 2010-11-18 15:54:59 -0800 | [diff] [blame] | 42 | |
Grant Likely | e169cfb | 2009-11-23 14:53:09 -0700 | [diff] [blame] | 43 | /* TBD: Temporary export of fdt globals - remove when code fully merged */ |
Grant Likely | f00abd9 | 2009-11-24 03:27:10 -0700 | [diff] [blame] | 44 | extern int __initdata dt_root_addr_cells; |
| 45 | extern int __initdata dt_root_size_cells; |
Rob Herring | 1daa0c4 | 2014-03-31 15:25:04 -0500 | [diff] [blame] | 46 | extern void *initial_boot_params; |
Grant Likely | e169cfb | 2009-11-23 14:53:09 -0700 | [diff] [blame] | 47 | |
Rob Herring | ccf3356 | 2014-04-03 13:38:32 -0500 | [diff] [blame] | 48 | extern char __dtb_start[]; |
| 49 | extern char __dtb_end[]; |
| 50 | |
Grant Likely | 8482f56 | 2009-10-15 10:58:04 -0600 | [diff] [blame] | 51 | /* For scanning the flat device-tree at boot time */ |
Grant Likely | 31a6a87 | 2009-11-23 19:49:38 -0700 | [diff] [blame] | 52 | extern int of_scan_flat_dt(int (*it)(unsigned long node, const char *uname, |
| 53 | int depth, void *data), |
| 54 | void *data); |
Rob Herring | 9d0c4df | 2014-04-01 23:49:03 -0500 | [diff] [blame] | 55 | extern const void *of_get_flat_dt_prop(unsigned long node, const char *name, |
| 56 | int *size); |
Grant Likely | 31a6a87 | 2009-11-23 19:49:38 -0700 | [diff] [blame] | 57 | extern int of_flat_dt_is_compatible(unsigned long node, const char *name); |
Uwe Kleine-König | 7b482c8 | 2011-12-20 22:56:45 +0100 | [diff] [blame] | 58 | extern int of_flat_dt_match(unsigned long node, const char *const *matches); |
Grant Likely | 31a6a87 | 2009-11-23 19:49:38 -0700 | [diff] [blame] | 59 | extern unsigned long of_get_flat_dt_root(void); |
Rob Herring | c0556d3 | 2014-04-22 12:55:10 -0500 | [diff] [blame] | 60 | extern int of_get_flat_dt_size(void); |
Grant Likely | 32c9768 | 2010-10-20 11:45:14 -0600 | [diff] [blame] | 61 | |
Grant Likely | 86e0322 | 2009-12-10 23:42:21 -0700 | [diff] [blame] | 62 | extern int early_init_dt_scan_chosen(unsigned long node, const char *uname, |
| 63 | int depth, void *data); |
Grant Likely | 51975db | 2010-02-01 21:34:14 -0700 | [diff] [blame] | 64 | extern int early_init_dt_scan_memory(unsigned long node, const char *uname, |
| 65 | int depth, void *data); |
Marek Szyprowski | e8d9d1f | 2014-02-28 14:42:47 +0100 | [diff] [blame] | 66 | extern void early_init_fdt_scan_reserved_mem(void); |
Grant Likely | 51975db | 2010-02-01 21:34:14 -0700 | [diff] [blame] | 67 | extern void early_init_dt_add_memory_arch(u64 base, u64 size); |
Marek Szyprowski | e8d9d1f | 2014-02-28 14:42:47 +0100 | [diff] [blame] | 68 | extern int early_init_dt_reserve_memory_arch(phys_addr_t base, phys_addr_t size, |
| 69 | bool no_map); |
Grant Likely | fe55c18 | 2011-08-04 10:27:32 +0100 | [diff] [blame] | 70 | extern void * early_init_dt_alloc_memory_arch(u64 size, u64 align); |
Rob Herring | 9d0c4df | 2014-04-01 23:49:03 -0500 | [diff] [blame] | 71 | extern u64 dt_mem_next_cell(int s, const __be32 **cellp); |
Grant Likely | 8482f56 | 2009-10-15 10:58:04 -0600 | [diff] [blame] | 72 | |
Grant Likely | f00abd9 | 2009-11-24 03:27:10 -0700 | [diff] [blame] | 73 | /* Early flat tree scan hooks */ |
| 74 | extern int early_init_dt_scan_root(unsigned long node, const char *uname, |
| 75 | int depth, void *data); |
| 76 | |
Rob Herring | 0288ffcb | 2013-08-26 09:47:40 -0500 | [diff] [blame] | 77 | extern bool early_init_dt_scan(void *params); |
Laura Abbott | 4972a74 | 2014-07-15 10:03:34 -0700 | [diff] [blame] | 78 | extern bool early_init_dt_verify(void *params); |
| 79 | extern void early_init_dt_scan_nodes(void); |
Rob Herring | 0288ffcb | 2013-08-26 09:47:40 -0500 | [diff] [blame] | 80 | |
Rob Herring | 6a903a2 | 2013-08-27 21:41:56 -0500 | [diff] [blame] | 81 | extern const char *of_flat_dt_get_machine_name(void); |
| 82 | extern const void *of_flat_dt_match_machine(const void *default_match, |
| 83 | const void * (*get_next_compat)(const char * const**)); |
| 84 | |
Grant Likely | 82b2928 | 2009-10-15 10:58:07 -0600 | [diff] [blame] | 85 | /* Other Prototypes */ |
Grant Likely | 82b2928 | 2009-10-15 10:58:07 -0600 | [diff] [blame] | 86 | extern void unflatten_device_tree(void); |
Rob Herring | a8bf752 | 2013-08-26 11:22:45 -0500 | [diff] [blame] | 87 | extern void unflatten_and_copy_device_tree(void); |
Grant Likely | 82b2928 | 2009-10-15 10:58:07 -0600 | [diff] [blame] | 88 | extern void early_init_devtree(void *); |
Kevin Hao | b27652d | 2013-12-24 15:12:08 +0800 | [diff] [blame] | 89 | extern void early_get_first_memblock_info(void *, phys_addr_t *); |
Rob Herring | e06e8b2 | 2014-03-27 07:37:43 -0500 | [diff] [blame] | 90 | extern u64 fdt_translate_address(const void *blob, int node_offset); |
Laura Abbott | 704033c | 2014-07-15 10:03:35 -0700 | [diff] [blame] | 91 | extern void of_fdt_limit_memory(int limit); |
Grant Likely | 8bfe9b5 | 2010-04-13 16:12:26 -0700 | [diff] [blame] | 92 | #else /* CONFIG_OF_FLATTREE */ |
Marek Szyprowski | e8d9d1f | 2014-02-28 14:42:47 +0100 | [diff] [blame] | 93 | static inline void early_init_fdt_scan_reserved_mem(void) {} |
Rob Herring | 6a903a2 | 2013-08-27 21:41:56 -0500 | [diff] [blame] | 94 | static inline const char *of_flat_dt_get_machine_name(void) { return NULL; } |
Grant Likely | 8bfe9b5 | 2010-04-13 16:12:26 -0700 | [diff] [blame] | 95 | static inline void unflatten_device_tree(void) {} |
Rob Herring | a8bf752 | 2013-08-26 11:22:45 -0500 | [diff] [blame] | 96 | static inline void unflatten_and_copy_device_tree(void) {} |
Grant Likely | cf32eb8 | 2010-04-13 16:12:25 -0700 | [diff] [blame] | 97 | #endif /* CONFIG_OF_FLATTREE */ |
Grant Likely | 82b2928 | 2009-10-15 10:58:07 -0600 | [diff] [blame] | 98 | |
Grant Likely | d45d94f | 2009-10-15 10:57:55 -0600 | [diff] [blame] | 99 | #endif /* __ASSEMBLY__ */ |
Grant Likely | d8678b5 | 2009-10-15 10:57:53 -0600 | [diff] [blame] | 100 | #endif /* _LINUX_OF_FDT_H */ |