217 lines
7.0 KiB
C
217 lines
7.0 KiB
C
#include <linux/of.h> /* linux/of.h gets to determine #include ordering */
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#ifndef _POWERPC_PROM_H
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#define _POWERPC_PROM_H
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#ifdef __KERNEL__
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/*
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* Definitions for talking to the Open Firmware PROM on
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* Power Macintosh computers.
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*
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* Copyright (C) 1996-2005 Paul Mackerras.
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*
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* Updates for PPC64 by Peter Bergner & David Engebretsen, IBM Corp.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/types.h>
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#include <linux/of_fdt.h>
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#include <linux/proc_fs.h>
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#include <linux/platform_device.h>
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#include <asm/irq.h>
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#include <asm/atomic.h>
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#define OF_ROOT_NODE_ADDR_CELLS_DEFAULT 1
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#define OF_ROOT_NODE_SIZE_CELLS_DEFAULT 1
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#define of_compat_cmp(s1, s2, l) strcasecmp((s1), (s2))
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#define of_prop_cmp(s1, s2) strcmp((s1), (s2))
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#define of_node_cmp(s1, s2) strcasecmp((s1), (s2))
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extern struct device_node *of_chosen;
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#define HAVE_ARCH_DEVTREE_FIXUPS
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/* For updating the device tree at runtime */
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extern void of_attach_node(struct device_node *);
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extern void of_detach_node(struct device_node *);
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#ifdef CONFIG_PPC32
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/*
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* PCI <-> OF matching functions
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* (XXX should these be here?)
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*/
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struct pci_bus;
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struct pci_dev;
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extern int pci_device_from_OF_node(struct device_node *node,
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u8* bus, u8* devfn);
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extern struct device_node* pci_busdev_to_OF_node(struct pci_bus *, int);
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extern struct device_node* pci_device_to_OF_node(struct pci_dev *);
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extern void pci_create_OF_bus_map(void);
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#endif
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extern struct resource *request_OF_resource(struct device_node* node,
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int index, const char* name_postfix);
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extern int release_OF_resource(struct device_node* node, int index);
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/*
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* OF address retreival & translation
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*/
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/* Translate an OF address block into a CPU physical address
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*/
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extern u64 of_translate_address(struct device_node *np, const u32 *addr);
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/* Translate a DMA address from device space to CPU space */
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extern u64 of_translate_dma_address(struct device_node *dev,
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const u32 *in_addr);
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/* Extract an address from a device, returns the region size and
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* the address space flags too. The PCI version uses a BAR number
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* instead of an absolute index
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*/
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extern const u32 *of_get_address(struct device_node *dev, int index,
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u64 *size, unsigned int *flags);
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#ifdef CONFIG_PCI
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extern const u32 *of_get_pci_address(struct device_node *dev, int bar_no,
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u64 *size, unsigned int *flags);
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#else
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static inline const u32 *of_get_pci_address(struct device_node *dev,
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int bar_no, u64 *size, unsigned int *flags)
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{
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return NULL;
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}
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#endif /* CONFIG_PCI */
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/* Get an address as a resource. Note that if your address is
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* a PIO address, the conversion will fail if the physical address
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* can't be internally converted to an IO token with
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* pci_address_to_pio(), that is because it's either called to early
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* or it can't be matched to any host bridge IO space
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*/
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extern int of_address_to_resource(struct device_node *dev, int index,
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struct resource *r);
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#ifdef CONFIG_PCI
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extern int of_pci_address_to_resource(struct device_node *dev, int bar,
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struct resource *r);
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#else
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static inline int of_pci_address_to_resource(struct device_node *dev, int bar,
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struct resource *r)
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{
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return -ENOSYS;
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}
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#endif /* CONFIG_PCI */
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/* Parse the ibm,dma-window property of an OF node into the busno, phys and
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* size parameters.
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*/
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void of_parse_dma_window(struct device_node *dn, const void *dma_window_prop,
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unsigned long *busno, unsigned long *phys, unsigned long *size);
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extern void kdump_move_device_tree(void);
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/* CPU OF node matching */
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struct device_node *of_get_cpu_node(int cpu, unsigned int *thread);
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/* cache lookup */
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struct device_node *of_find_next_cache_node(struct device_node *np);
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/* Get the MAC address */
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extern const void *of_get_mac_address(struct device_node *np);
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/*
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* OF interrupt mapping
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*/
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/* This structure is returned when an interrupt is mapped. The controller
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* field needs to be put() after use
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*/
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#define OF_MAX_IRQ_SPEC 4 /* We handle specifiers of at most 4 cells */
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struct of_irq {
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struct device_node *controller; /* Interrupt controller node */
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u32 size; /* Specifier size */
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u32 specifier[OF_MAX_IRQ_SPEC]; /* Specifier copy */
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};
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/**
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* of_irq_map_init - Initialize the irq remapper
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* @flags: flags defining workarounds to enable
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*
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* Some machines have bugs in the device-tree which require certain workarounds
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* to be applied. Call this before any interrupt mapping attempts to enable
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* those workarounds.
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*/
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#define OF_IMAP_OLDWORLD_MAC 0x00000001
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#define OF_IMAP_NO_PHANDLE 0x00000002
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extern void of_irq_map_init(unsigned int flags);
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/**
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* of_irq_map_raw - Low level interrupt tree parsing
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* @parent: the device interrupt parent
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* @intspec: interrupt specifier ("interrupts" property of the device)
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* @ointsize: size of the passed in interrupt specifier
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* @addr: address specifier (start of "reg" property of the device)
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* @out_irq: structure of_irq filled by this function
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*
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* Returns 0 on success and a negative number on error
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*
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* This function is a low-level interrupt tree walking function. It
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* can be used to do a partial walk with synthetized reg and interrupts
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* properties, for example when resolving PCI interrupts when no device
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* node exist for the parent.
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*
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*/
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extern int of_irq_map_raw(struct device_node *parent, const u32 *intspec,
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u32 ointsize, const u32 *addr,
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struct of_irq *out_irq);
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/**
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* of_irq_map_one - Resolve an interrupt for a device
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* @device: the device whose interrupt is to be resolved
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* @index: index of the interrupt to resolve
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* @out_irq: structure of_irq filled by this function
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*
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* This function resolves an interrupt, walking the tree, for a given
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* device-tree node. It's the high level pendant to of_irq_map_raw().
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* It also implements the workarounds for OldWolrd Macs.
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*/
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extern int of_irq_map_one(struct device_node *device, int index,
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struct of_irq *out_irq);
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/**
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* of_irq_map_pci - Resolve the interrupt for a PCI device
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* @pdev: the device whose interrupt is to be resolved
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* @out_irq: structure of_irq filled by this function
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*
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* This function resolves the PCI interrupt for a given PCI device. If a
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* device-node exists for a given pci_dev, it will use normal OF tree
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* walking. If not, it will implement standard swizzling and walk up the
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* PCI tree until an device-node is found, at which point it will finish
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* resolving using the OF tree walking.
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*/
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struct pci_dev;
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extern int of_irq_map_pci(struct pci_dev *pdev, struct of_irq *out_irq);
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extern int of_irq_to_resource(struct device_node *dev, int index,
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struct resource *r);
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/**
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* of_iomap - Maps the memory mapped IO for a given device_node
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* @device: the device whose io range will be mapped
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* @index: index of the io range
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*
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* Returns a pointer to the mapped memory
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*/
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extern void __iomem *of_iomap(struct device_node *device, int index);
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#endif /* __KERNEL__ */
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#endif /* _POWERPC_PROM_H */
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