arch/powerpc/include/asm/prom.h

   1 #include <linux/of.h>   /* linux/of.h gets to determine #include ordering */
   2 #ifndef _POWERPC_PROM_H
   3 #define _POWERPC_PROM_H
   4 #ifdef __KERNEL__
   5
   6 /*
   7  * Definitions for talking to the Open Firmware PROM on
   8  * Power Macintosh computers.
   9  *
  10  * Copyright (C) 1996-2005 Paul Mackerras.
  11  *
  12  * Updates for PPC64 by Peter Bergner & David Engebretsen, IBM Corp.
  13  *
  14  * This program is free software; you can redistribute it and/or
  15  * modify it under the terms of the GNU General Public License
  16  * as published by the Free Software Foundation; either version
  17  * 2 of the License, or (at your option) any later version.
  18  */
  19 #include <linux/types.h>
  20 #include <linux/of_fdt.h>
  21 #include <linux/of_address.h>
  22 #include <linux/of_irq.h>
  23 #include <linux/proc_fs.h>
  24 #include <linux/platform_device.h>
  25 #include <asm/irq.h>
  26 #include <asm/atomic.h>
  27
  28 #define HAVE_ARCH_DEVTREE_FIXUPS
  29
  30 #ifdef CONFIG_PPC32
  31 /*
  32  * PCI <-> OF matching functions
  33  * (XXX should these be here?)
  34  */
  35 struct pci_bus;
  36 struct pci_dev;
  37 extern int pci_device_from_OF_node(struct device_node *node,
  38                                    u8* bus, u8* devfn);
  39 extern struct device_node* pci_busdev_to_OF_node(struct pci_bus *, int);
  40 extern struct device_node* pci_device_to_OF_node(struct pci_dev *);
  41 extern void pci_create_OF_bus_map(void);
  42 #endif
  43
  44 /*
  45  * OF address retreival & translation
  46  */
  47
  48 /* Translate an OF address block into a CPU physical address
  49  */
  50 extern u64 of_translate_address(struct device_node *np, const u32 *addr);
  51
  52 /* Translate a DMA address from device space to CPU space */
  53 extern u64 of_translate_dma_address(struct device_node *dev,
  54                                     const u32 *in_addr);
  55
  56 /* Extract an address from a device, returns the region size and
  57  * the address space flags too. The PCI version uses a BAR number
  58  * instead of an absolute index
  59  */
  60 extern const u32 *of_get_address(struct device_node *dev, int index,
  61                            u64 *size, unsigned int *flags);
  62 #ifdef CONFIG_PCI
  63 extern const u32 *of_get_pci_address(struct device_node *dev, int bar_no,
  64                                u64 *size, unsigned int *flags);
  65 #else
  66 static inline const u32 *of_get_pci_address(struct device_node *dev,
  67                 int bar_no, u64 *size, unsigned int *flags)
  68 {
  69         return NULL;
  70 }
  71 #endif /* CONFIG_PCI */
  72
  73 /* Get an address as a resource. Note that if your address is
  74  * a PIO address, the conversion will fail if the physical address
  75  * can't be internally converted to an IO token with
  76  * pci_address_to_pio(), that is because it's either called to early
  77  * or it can't be matched to any host bridge IO space
  78  */
  79 extern int of_address_to_resource(struct device_node *dev, int index,
  80                                   struct resource *r);
  81 #ifdef CONFIG_PCI
  82 extern int of_pci_address_to_resource(struct device_node *dev, int bar,
  83                                       struct resource *r);
  84 #else
  85 static inline int of_pci_address_to_resource(struct device_node *dev, int bar,
  86                 struct resource *r)
  87 {
  88         return -ENOSYS;
  89 }
  90 #endif /* CONFIG_PCI */
  91
  92 /* Parse the ibm,dma-window property of an OF node into the busno, phys and
  93  * size parameters.
  94  */
  95 void of_parse_dma_window(struct device_node *dn, const void *dma_window_prop,
  96                 unsigned long *busno, unsigned long *phys, unsigned long *size);
  97
  98 extern void kdump_move_device_tree(void);
  99
 100 /* CPU OF node matching */
 101 struct device_node *of_get_cpu_node(int cpu, unsigned int *thread);
 102
 103 /* cache lookup */
 104 struct device_node *of_find_next_cache_node(struct device_node *np);
 105
 106 /* Get the MAC address */
 107 extern const void *of_get_mac_address(struct device_node *np);
 108
 109 /**
 110  * of_irq_map_pci - Resolve the interrupt for a PCI device
 111  * @pdev:       the device whose interrupt is to be resolved
 112  * @out_irq:    structure of_irq filled by this function
 113  *
 114  * This function resolves the PCI interrupt for a given PCI device. If a
 115  * device-node exists for a given pci_dev, it will use normal OF tree
 116  * walking. If not, it will implement standard swizzling and walk up the
 117  * PCI tree until an device-node is found, at which point it will finish
 118  * resolving using the OF tree walking.
 119  */
 120 struct pci_dev;
 121 extern int of_irq_map_pci(struct pci_dev *pdev, struct of_irq *out_irq);
 122
 123 #endif /* __KERNEL__ */
 124 #endif /* _POWERPC_PROM_H */