2 * Definitions for talking to the Open Firmware PROM on
3 * Power Macintosh computers.
5 * Copyright (C) 1996-2005 Paul Mackerras.
7 * Updates for PPC64 by Peter Bergner & David Engebretsen, IBM Corp.
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License
11 * as published by the Free Software Foundation; either version
12 * 2 of the License, or (at your option) any later version.
15 #include <linux/of.h> /* linux/of.h gets to determine #include ordering */
17 #ifndef _ASM_MICROBLAZE_PROM_H
18 #define _ASM_MICROBLAZE_PROM_H
21 /* Definitions used by the flattened device tree */
22 #define OF_DT_HEADER 0xd00dfeed /* marker */
23 #define OF_DT_BEGIN_NODE 0x1 /* Start of node, full name */
24 #define OF_DT_END_NODE 0x2 /* End node */
25 #define OF_DT_PROP 0x3 /* Property: name off, size, content */
26 #define OF_DT_NOP 0x4 /* nop */
29 #define OF_DT_VERSION 0x10
33 #include <linux/types.h>
34 #include <linux/proc_fs.h>
35 #include <linux/platform_device.h>
37 #include <asm/atomic.h>
39 #define OF_ROOT_NODE_ADDR_CELLS_DEFAULT 1
40 #define OF_ROOT_NODE_SIZE_CELLS_DEFAULT 1
42 #define of_compat_cmp(s1, s2, l) strncasecmp((s1), (s2), (l))
43 #define of_prop_cmp(s1, s2) strcmp((s1), (s2))
44 #define of_node_cmp(s1, s2) strcasecmp((s1), (s2))
47 * This is what gets passed to the kernel by prom_init or kexec
49 * The dt struct contains the device tree structure, full pathes and
50 * property contents. The dt strings contain a separate block with just
51 * the strings for the property names, and is fully page aligned and
52 * self contained in a page, so that it can be kept around by the kernel,
53 * each property name appears only once in this page (cheap compression)
55 * the mem_rsvmap contains a map of reserved ranges of physical memory,
56 * passing it here instead of in the device-tree itself greatly simplifies
57 * the job of everybody. It's just a list of u64 pairs (base/size) that
60 struct boot_param_header {
61 u32 magic; /* magic word OF_DT_HEADER */
62 u32 totalsize; /* total size of DT block */
63 u32 off_dt_struct; /* offset to structure */
64 u32 off_dt_strings; /* offset to strings */
65 u32 off_mem_rsvmap; /* offset to memory reserve map */
66 u32 version; /* format version */
67 u32 last_comp_version; /* last compatible version */
68 /* version 2 fields below */
69 u32 boot_cpuid_phys; /* Physical CPU id we're booting on */
70 /* version 3 fields below */
71 u32 dt_strings_size; /* size of the DT strings block */
72 /* version 17 fields below */
73 u32 dt_struct_size; /* size of the DT structure block */
80 phandle linux_phandle;
83 struct property *properties;
84 struct property *deadprops; /* removed properties */
85 struct device_node *parent;
86 struct device_node *child;
87 struct device_node *sibling;
88 struct device_node *next; /* next device of same type */
89 struct device_node *allnext; /* next in list of all nodes */
90 struct proc_dir_entry *pde; /* this node's proc directory */
96 extern struct device_node *of_chosen;
98 static inline int of_node_check_flag(struct device_node *n, unsigned long flag)
100 return test_bit(flag, &n->_flags);
103 static inline void of_node_set_flag(struct device_node *n, unsigned long flag)
105 set_bit(flag, &n->_flags);
108 #define HAVE_ARCH_DEVTREE_FIXUPS
110 static inline void set_node_proc_entry(struct device_node *dn,
111 struct proc_dir_entry *de)
116 extern struct device_node *allnodes; /* temporary while merging */
117 extern rwlock_t devtree_lock; /* temporary while merging */
119 extern struct device_node *of_find_all_nodes(struct device_node *prev);
120 extern struct device_node *of_node_get(struct device_node *node);
121 extern void of_node_put(struct device_node *node);
123 /* For scanning the flat device-tree at boot time */
124 extern int __init of_scan_flat_dt(int (*it)(unsigned long node,
125 const char *uname, int depth,
128 extern void *__init of_get_flat_dt_prop(unsigned long node, const char *name,
129 unsigned long *size);
131 of_flat_dt_is_compatible(unsigned long node, const char *name);
132 extern unsigned long __init of_get_flat_dt_root(void);
134 /* For updating the device tree at runtime */
135 extern void of_attach_node(struct device_node *);
136 extern void of_detach_node(struct device_node *);
138 /* Other Prototypes */
139 extern void finish_device_tree(void);
140 extern void unflatten_device_tree(void);
141 extern int early_uartlite_console(void);
142 extern void early_init_devtree(void *);
143 extern int machine_is_compatible(const char *compat);
144 extern void print_properties(struct device_node *node);
145 extern int prom_n_intr_cells(struct device_node *np);
146 extern void prom_get_irq_senses(unsigned char *senses, int off, int max);
147 extern int prom_add_property(struct device_node *np, struct property *prop);
148 extern int prom_remove_property(struct device_node *np, struct property *prop);
149 extern int prom_update_property(struct device_node *np,
150 struct property *newprop,
151 struct property *oldprop);
153 extern struct resource *request_OF_resource(struct device_node *node,
154 int index, const char *name_postfix);
155 extern int release_OF_resource(struct device_node *node, int index);
158 * OF address retreival & translation
161 /* Helper to read a big number; size is in cells (not bytes) */
162 static inline u64 of_read_number(const u32 *cell, int size)
166 r = (r << 32) | *(cell++);
170 /* Like of_read_number, but we want an unsigned long result */
171 #define of_read_ulong(cell, size) of_read_number(cell, size)
173 /* Translate an OF address block into a CPU physical address
175 extern u64 of_translate_address(struct device_node *np, const u32 *addr);
177 /* Extract an address from a device, returns the region size and
178 * the address space flags too. The PCI version uses a BAR number
179 * instead of an absolute index
181 extern const u32 *of_get_address(struct device_node *dev, int index,
182 u64 *size, unsigned int *flags);
183 extern const u32 *of_get_pci_address(struct device_node *dev, int bar_no,
184 u64 *size, unsigned int *flags);
186 /* Get an address as a resource. Note that if your address is
187 * a PIO address, the conversion will fail if the physical address
188 * can't be internally converted to an IO token with
189 * pci_address_to_pio(), that is because it's either called to early
190 * or it can't be matched to any host bridge IO space
192 extern int of_address_to_resource(struct device_node *dev, int index,
194 extern int of_pci_address_to_resource(struct device_node *dev, int bar,
197 /* Parse the ibm,dma-window property of an OF node into the busno, phys and
200 void of_parse_dma_window(struct device_node *dn, const void *dma_window_prop,
201 unsigned long *busno, unsigned long *phys, unsigned long *size);
203 extern void kdump_move_device_tree(void);
205 /* CPU OF node matching */
206 struct device_node *of_get_cpu_node(int cpu, unsigned int *thread);
208 /* Get the MAC address */
209 extern const void *of_get_mac_address(struct device_node *np);
212 * OF interrupt mapping
215 /* This structure is returned when an interrupt is mapped. The controller
216 * field needs to be put() after use
219 #define OF_MAX_IRQ_SPEC 4 /* We handle specifiers of at most 4 cells */
222 struct device_node *controller; /* Interrupt controller node */
223 u32 size; /* Specifier size */
224 u32 specifier[OF_MAX_IRQ_SPEC]; /* Specifier copy */
228 * of_irq_map_init - Initialize the irq remapper
229 * @flags: flags defining workarounds to enable
231 * Some machines have bugs in the device-tree which require certain workarounds
232 * to be applied. Call this before any interrupt mapping attempts to enable
235 #define OF_IMAP_OLDWORLD_MAC 0x00000001
236 #define OF_IMAP_NO_PHANDLE 0x00000002
238 extern void of_irq_map_init(unsigned int flags);
241 * of_irq_map_raw - Low level interrupt tree parsing
242 * @parent: the device interrupt parent
243 * @intspec: interrupt specifier ("interrupts" property of the device)
244 * @ointsize: size of the passed in interrupt specifier
245 * @addr: address specifier (start of "reg" property of the device)
246 * @out_irq: structure of_irq filled by this function
248 * Returns 0 on success and a negative number on error
250 * This function is a low-level interrupt tree walking function. It
251 * can be used to do a partial walk with synthetized reg and interrupts
252 * properties, for example when resolving PCI interrupts when no device
253 * node exist for the parent.
257 extern int of_irq_map_raw(struct device_node *parent, const u32 *intspec,
258 u32 ointsize, const u32 *addr,
259 struct of_irq *out_irq);
262 * of_irq_map_one - Resolve an interrupt for a device
263 * @device: the device whose interrupt is to be resolved
264 * @index: index of the interrupt to resolve
265 * @out_irq: structure of_irq filled by this function
267 * This function resolves an interrupt, walking the tree, for a given
268 * device-tree node. It's the high level pendant to of_irq_map_raw().
269 * It also implements the workarounds for OldWolrd Macs.
271 extern int of_irq_map_one(struct device_node *device, int index,
272 struct of_irq *out_irq);
275 * of_irq_map_pci - Resolve the interrupt for a PCI device
276 * @pdev: the device whose interrupt is to be resolved
277 * @out_irq: structure of_irq filled by this function
279 * This function resolves the PCI interrupt for a given PCI device. If a
280 * device-node exists for a given pci_dev, it will use normal OF tree
281 * walking. If not, it will implement standard swizzling and walk up the
282 * PCI tree until an device-node is found, at which point it will finish
283 * resolving using the OF tree walking.
286 extern int of_irq_map_pci(struct pci_dev *pdev, struct of_irq *out_irq);
288 extern int of_irq_to_resource(struct device_node *dev, int index,
292 * of_iomap - Maps the memory mapped IO for a given device_node
293 * @device: the device whose io range will be mapped
294 * @index: index of the io range
296 * Returns a pointer to the mapped memory
298 extern void __iomem *of_iomap(struct device_node *device, int index);
300 #endif /* __ASSEMBLY__ */
301 #endif /* __KERNEL__ */
302 #endif /* _ASM_MICROBLAZE_PROM_H */