| #ifndef _POWERPC_PROM_H |
| #define _POWERPC_PROM_H |
| #ifdef __KERNEL__ |
| |
| /* |
| * Definitions for talking to the Open Firmware PROM on |
| * Power Macintosh computers. |
| * |
| * Copyright (C) 1996-2005 Paul Mackerras. |
| * |
| * Updates for PPC64 by Peter Bergner & David Engebretsen, IBM Corp. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version |
| * 2 of the License, or (at your option) any later version. |
| */ |
| #include <linux/types.h> |
| #include <linux/proc_fs.h> |
| #include <asm/atomic.h> |
| |
| /* Definitions used by the flattened device tree */ |
| #define OF_DT_HEADER 0xd00dfeed /* marker */ |
| #define OF_DT_BEGIN_NODE 0x1 /* Start of node, full name */ |
| #define OF_DT_END_NODE 0x2 /* End node */ |
| #define OF_DT_PROP 0x3 /* Property: name off, size, |
| * content */ |
| #define OF_DT_NOP 0x4 /* nop */ |
| #define OF_DT_END 0x9 |
| |
| #define OF_DT_VERSION 0x10 |
| |
| /* |
| * This is what gets passed to the kernel by prom_init or kexec |
| * |
| * The dt struct contains the device tree structure, full pathes and |
| * property contents. The dt strings contain a separate block with just |
| * the strings for the property names, and is fully page aligned and |
| * self contained in a page, so that it can be kept around by the kernel, |
| * each property name appears only once in this page (cheap compression) |
| * |
| * the mem_rsvmap contains a map of reserved ranges of physical memory, |
| * passing it here instead of in the device-tree itself greatly simplifies |
| * the job of everybody. It's just a list of u64 pairs (base/size) that |
| * ends when size is 0 |
| */ |
| struct boot_param_header |
| { |
| u32 magic; /* magic word OF_DT_HEADER */ |
| u32 totalsize; /* total size of DT block */ |
| u32 off_dt_struct; /* offset to structure */ |
| u32 off_dt_strings; /* offset to strings */ |
| u32 off_mem_rsvmap; /* offset to memory reserve map */ |
| u32 version; /* format version */ |
| u32 last_comp_version; /* last compatible version */ |
| /* version 2 fields below */ |
| u32 boot_cpuid_phys; /* Physical CPU id we're booting on */ |
| /* version 3 fields below */ |
| u32 dt_strings_size; /* size of the DT strings block */ |
| }; |
| |
| |
| |
| typedef u32 phandle; |
| typedef u32 ihandle; |
| |
| struct property { |
| char *name; |
| int length; |
| unsigned char *value; |
| struct property *next; |
| }; |
| |
| struct device_node { |
| const char *name; |
| const char *type; |
| phandle node; |
| phandle linux_phandle; |
| char *full_name; |
| |
| struct property *properties; |
| struct property *deadprops; /* removed properties */ |
| struct device_node *parent; |
| struct device_node *child; |
| struct device_node *sibling; |
| struct device_node *next; /* next device of same type */ |
| struct device_node *allnext; /* next in list of all nodes */ |
| struct proc_dir_entry *pde; /* this node's proc directory */ |
| struct kref kref; |
| unsigned long _flags; |
| void *data; |
| }; |
| |
| extern struct device_node *of_chosen; |
| |
| /* flag descriptions */ |
| #define OF_DYNAMIC 1 /* node and properties were allocated via kmalloc */ |
| |
| #define OF_IS_DYNAMIC(x) test_bit(OF_DYNAMIC, &x->_flags) |
| #define OF_MARK_DYNAMIC(x) set_bit(OF_DYNAMIC, &x->_flags) |
| |
| #define HAVE_ARCH_DEVTREE_FIXUPS |
| |
| static inline void set_node_proc_entry(struct device_node *dn, struct proc_dir_entry *de) |
| { |
| dn->pde = de; |
| } |
| |
| |
| /* OBSOLETE: Old style node lookup */ |
| extern struct device_node *find_devices(const char *name); |
| extern struct device_node *find_type_devices(const char *type); |
| extern struct device_node *find_path_device(const char *path); |
| extern struct device_node *find_compatible_devices(const char *type, |
| const char *compat); |
| extern struct device_node *find_all_nodes(void); |
| |
| /* New style node lookup */ |
| extern struct device_node *of_find_node_by_name(struct device_node *from, |
| const char *name); |
| #define for_each_node_by_name(dn, name) \ |
| for (dn = of_find_node_by_name(NULL, name); dn; \ |
| dn = of_find_node_by_name(dn, name)) |
| extern struct device_node *of_find_node_by_type(struct device_node *from, |
| const char *type); |
| #define for_each_node_by_type(dn, type) \ |
| for (dn = of_find_node_by_type(NULL, type); dn; \ |
| dn = of_find_node_by_type(dn, type)) |
| extern struct device_node *of_find_compatible_node(struct device_node *from, |
| const char *type, const char *compat); |
| extern struct device_node *of_find_node_by_path(const char *path); |
| extern struct device_node *of_find_node_by_phandle(phandle handle); |
| extern struct device_node *of_find_all_nodes(struct device_node *prev); |
| extern struct device_node *of_get_parent(const struct device_node *node); |
| extern struct device_node *of_get_next_child(const struct device_node *node, |
| struct device_node *prev); |
| extern struct property *of_find_property(struct device_node *np, |
| const char *name, |
| int *lenp); |
| extern struct device_node *of_node_get(struct device_node *node); |
| extern void of_node_put(struct device_node *node); |
| |
| /* For scanning the flat device-tree at boot time */ |
| extern int __init of_scan_flat_dt(int (*it)(unsigned long node, |
| const char *uname, int depth, |
| void *data), |
| void *data); |
| extern void* __init of_get_flat_dt_prop(unsigned long node, const char *name, |
| unsigned long *size); |
| extern int __init of_flat_dt_is_compatible(unsigned long node, const char *name); |
| extern unsigned long __init of_get_flat_dt_root(void); |
| |
| /* For updating the device tree at runtime */ |
| extern void of_attach_node(struct device_node *); |
| extern void of_detach_node(const struct device_node *); |
| |
| /* Other Prototypes */ |
| extern void finish_device_tree(void); |
| extern void unflatten_device_tree(void); |
| extern void early_init_devtree(void *); |
| extern int device_is_compatible(struct device_node *device, const char *); |
| extern int machine_is_compatible(const char *compat); |
| extern const void *get_property(struct device_node *node, const char *name, |
| int *lenp); |
| extern void print_properties(struct device_node *node); |
| extern int prom_n_addr_cells(struct device_node* np); |
| extern int prom_n_size_cells(struct device_node* np); |
| extern int prom_n_intr_cells(struct device_node* np); |
| extern void prom_get_irq_senses(unsigned char *senses, int off, int max); |
| extern int prom_add_property(struct device_node* np, struct property* prop); |
| extern int prom_remove_property(struct device_node *np, struct property *prop); |
| extern int prom_update_property(struct device_node *np, |
| struct property *newprop, |
| struct property *oldprop); |
| |
| #ifdef CONFIG_PPC32 |
| /* |
| * PCI <-> OF matching functions |
| * (XXX should these be here?) |
| */ |
| struct pci_bus; |
| struct pci_dev; |
| extern int pci_device_from_OF_node(struct device_node *node, |
| u8* bus, u8* devfn); |
| extern struct device_node* pci_busdev_to_OF_node(struct pci_bus *, int); |
| extern struct device_node* pci_device_to_OF_node(struct pci_dev *); |
| extern void pci_create_OF_bus_map(void); |
| #endif |
| |
| extern struct resource *request_OF_resource(struct device_node* node, |
| int index, const char* name_postfix); |
| extern int release_OF_resource(struct device_node* node, int index); |
| |
| |
| /* |
| * OF address retreival & translation |
| */ |
| |
| |
| /* Helper to read a big number */ |
| static inline u64 of_read_number(const u32 *cell, int size) |
| { |
| u64 r = 0; |
| while (size--) |
| r = (r << 32) | *(cell++); |
| return r; |
| } |
| |
| /* Translate an OF address block into a CPU physical address |
| */ |
| #define OF_BAD_ADDR ((u64)-1) |
| extern u64 of_translate_address(struct device_node *np, const u32 *addr); |
| |
| /* Extract an address from a device, returns the region size and |
| * the address space flags too. The PCI version uses a BAR number |
| * instead of an absolute index |
| */ |
| extern const u32 *of_get_address(struct device_node *dev, int index, |
| u64 *size, unsigned int *flags); |
| extern const u32 *of_get_pci_address(struct device_node *dev, int bar_no, |
| u64 *size, unsigned int *flags); |
| |
| /* Get an address as a resource. Note that if your address is |
| * a PIO address, the conversion will fail if the physical address |
| * can't be internally converted to an IO token with |
| * pci_address_to_pio(), that is because it's either called to early |
| * or it can't be matched to any host bridge IO space |
| */ |
| extern int of_address_to_resource(struct device_node *dev, int index, |
| struct resource *r); |
| extern int of_pci_address_to_resource(struct device_node *dev, int bar, |
| struct resource *r); |
| |
| /* Parse the ibm,dma-window property of an OF node into the busno, phys and |
| * size parameters. |
| */ |
| void of_parse_dma_window(struct device_node *dn, const void *dma_window_prop, |
| unsigned long *busno, unsigned long *phys, unsigned long *size); |
| |
| extern void kdump_move_device_tree(void); |
| |
| /* CPU OF node matching */ |
| struct device_node *of_get_cpu_node(int cpu, unsigned int *thread); |
| |
| |
| /* |
| * OF interrupt mapping |
| */ |
| |
| /* This structure is returned when an interrupt is mapped. The controller |
| * field needs to be put() after use |
| */ |
| |
| #define OF_MAX_IRQ_SPEC 4 /* We handle specifiers of at most 4 cells */ |
| |
| struct of_irq { |
| struct device_node *controller; /* Interrupt controller node */ |
| u32 size; /* Specifier size */ |
| u32 specifier[OF_MAX_IRQ_SPEC]; /* Specifier copy */ |
| }; |
| |
| /*** |
| * of_irq_map_init - Initialize the irq remapper |
| * @flags: flags defining workarounds to enable |
| * |
| * Some machines have bugs in the device-tree which require certain workarounds |
| * to be applied. Call this before any interrupt mapping attempts to enable |
| * those workarounds. |
| */ |
| #define OF_IMAP_OLDWORLD_MAC 0x00000001 |
| #define OF_IMAP_NO_PHANDLE 0x00000002 |
| |
| extern void of_irq_map_init(unsigned int flags); |
| |
| /*** |
| * of_irq_map_raw - Low level interrupt tree parsing |
| * @parent: the device interrupt parent |
| * @intspec: interrupt specifier ("interrupts" property of the device) |
| * @addr: address specifier (start of "reg" property of the device) |
| * @out_irq: structure of_irq filled by this function |
| * |
| * Returns 0 on success and a negative number on error |
| * |
| * This function is a low-level interrupt tree walking function. It |
| * can be used to do a partial walk with synthetized reg and interrupts |
| * properties, for example when resolving PCI interrupts when no device |
| * node exist for the parent. |
| * |
| */ |
| |
| extern int of_irq_map_raw(struct device_node *parent, const u32 *intspec, |
| const u32 *addr, struct of_irq *out_irq); |
| |
| |
| /*** |
| * of_irq_map_one - Resolve an interrupt for a device |
| * @device: the device whose interrupt is to be resolved |
| * @index: index of the interrupt to resolve |
| * @out_irq: structure of_irq filled by this function |
| * |
| * This function resolves an interrupt, walking the tree, for a given |
| * device-tree node. It's the high level pendant to of_irq_map_raw(). |
| * It also implements the workarounds for OldWolrd Macs. |
| */ |
| extern int of_irq_map_one(struct device_node *device, int index, |
| struct of_irq *out_irq); |
| |
| /*** |
| * of_irq_map_pci - Resolve the interrupt for a PCI device |
| * @pdev: the device whose interrupt is to be resolved |
| * @out_irq: structure of_irq filled by this function |
| * |
| * This function resolves the PCI interrupt for a given PCI device. If a |
| * device-node exists for a given pci_dev, it will use normal OF tree |
| * walking. If not, it will implement standard swizzling and walk up the |
| * PCI tree until an device-node is found, at which point it will finish |
| * resolving using the OF tree walking. |
| */ |
| struct pci_dev; |
| extern int of_irq_map_pci(struct pci_dev *pdev, struct of_irq *out_irq); |
| |
| |
| #endif /* __KERNEL__ */ |
| #endif /* _POWERPC_PROM_H */ |