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_irq.h>
  22 #include <linux/proc_fs.h>
  23 #include <linux/platform_device.h>
  24 #include <asm/irq.h>
  25 #include <asm/atomic.h>
  26
  27 #define HAVE_ARCH_DEVTREE_FIXUPS
  28
  29 #ifdef CONFIG_PPC32
  30 /*
  31  * PCI <-> OF matching functions
  32  * (XXX should these be here?)
  33  */
  34 struct pci_bus;
  35 struct pci_dev;
  36 extern int pci_device_from_OF_node(struct device_node *node,
  37                                    u8* bus, u8* devfn);
  38 extern struct device_node* pci_busdev_to_OF_node(struct pci_bus *, int);
  39 extern struct device_node* pci_device_to_OF_node(struct pci_dev *);
  40 extern void pci_create_OF_bus_map(void);
  41 #endif
  42
  43 /*
  44  * OF address retreival & translation
  45  */
  46
  47 /* Translate an OF address block into a CPU physical address
  48  */
  49 extern u64 of_translate_address(struct device_node *np, const u32 *addr);
  50
  51 /* Translate a DMA address from device space to CPU space */
  52 extern u64 of_translate_dma_address(struct device_node *dev,
  53                                     const u32 *in_addr);
  54
  55 /* Extract an address from a device, returns the region size and
  56  * the address space flags too. The PCI version uses a BAR number
  57  * instead of an absolute index
  58  */
  59 extern const u32 *of_get_address(struct device_node *dev, int index,
  60                            u64 *size, unsigned int *flags);
  61 #ifdef CONFIG_PCI
  62 extern const u32 *of_get_pci_address(struct device_node *dev, int bar_no,
  63                                u64 *size, unsigned int *flags);
  64 #else
  65 static inline const u32 *of_get_pci_address(struct device_node *dev,
  66                 int bar_no, u64 *size, unsigned int *flags)
  67 {
  68         return NULL;
  69 }
  70 #endif /* CONFIG_PCI */
  71
  72 /* Get an address as a resource. Note that if your address is
  73  * a PIO address, the conversion will fail if the physical address
  74  * can't be internally converted to an IO token with
  75  * pci_address_to_pio(), that is because it's either called to early
  76  * or it can't be matched to any host bridge IO space
  77  */
  78 extern int of_address_to_resource(struct device_node *dev, int index,
  79                                   struct resource *r);
  80 #ifdef CONFIG_PCI
  81 extern int of_pci_address_to_resource(struct device_node *dev, int bar,
  82                                       struct resource *r);
  83 #else
  84 static inline int of_pci_address_to_resource(struct device_node *dev, int bar,
  85                 struct resource *r)
  86 {
  87         return -ENOSYS;
  88 }
  89 #endif /* CONFIG_PCI */
  90
  91 /* Parse the ibm,dma-window property of an OF node into the busno, phys and
  92  * size parameters.
  93  */
  94 void of_parse_dma_window(struct device_node *dn, const void *dma_window_prop,
  95                 unsigned long *busno, unsigned long *phys, unsigned long *size);
  96
  97 extern void kdump_move_device_tree(void);
  98
  99 /* CPU OF node matching */
 100 struct device_node *of_get_cpu_node(int cpu, unsigned int *thread);
 101
 102 /* cache lookup */
 103 struct device_node *of_find_next_cache_node(struct device_node *np);
 104
 105 /* Get the MAC address */
 106 extern const void *of_get_mac_address(struct device_node *np);
 107
 108 /*
 109  * OF interrupt mapping
 110  */
 111
 112 /**
 113  * of_irq_map_init - Initialize the irq remapper
 114  * @flags:      flags defining workarounds to enable
 115  *
 116  * Some machines have bugs in the device-tree which require certain workarounds
 117  * to be applied. Call this before any interrupt mapping attempts to enable
 118  * those workarounds.
 119  */
 120 #define OF_IMAP_OLDWORLD_MAC    0x00000001
 121 #define OF_IMAP_NO_PHANDLE      0x00000002
 122
 123 extern void of_irq_map_init(unsigned int flags);
 124
 125 /**
 126  * of_irq_map_raw - Low level interrupt tree parsing
 127  * @parent:     the device interrupt parent
 128  * @intspec:    interrupt specifier ("interrupts" property of the device)
 129  * @ointsize:   size of the passed in interrupt specifier
 130  * @addr:       address specifier (start of "reg" property of the device)
 131  * @out_irq:    structure of_irq filled by this function
 132  *
 133  * Returns 0 on success and a negative number on error
 134  *
 135  * This function is a low-level interrupt tree walking function. It
 136  * can be used to do a partial walk with synthetized reg and interrupts
 137  * properties, for example when resolving PCI interrupts when no device
 138  * node exist for the parent.
 139  *
 140  */
 141
 142 extern int of_irq_map_raw(struct device_node *parent, const u32 *intspec,
 143                           u32 ointsize, const u32 *addr,
 144                           struct of_irq *out_irq);
 145
 146 /**
 147  * of_irq_map_pci - Resolve the interrupt for a PCI device
 148  * @pdev:       the device whose interrupt is to be resolved
 149  * @out_irq:    structure of_irq filled by this function
 150  *
 151  * This function resolves the PCI interrupt for a given PCI device. If a
 152  * device-node exists for a given pci_dev, it will use normal OF tree
 153  * walking. If not, it will implement standard swizzling and walk up the
 154  * PCI tree until an device-node is found, at which point it will finish
 155  * resolving using the OF tree walking.
 156  */
 157 struct pci_dev;
 158 extern int of_irq_map_pci(struct pci_dev *pdev, struct of_irq *out_irq);
 159
 160 extern int of_irq_to_resource(struct device_node *dev, int index,
 161                         struct resource *r);
 162
 163 /**
 164  * of_iomap - Maps the memory mapped IO for a given device_node
 165  * @device:     the device whose io range will be mapped
 166  * @index:      index of the io range
 167  *
 168  * Returns a pointer to the mapped memory
 169  */
 170 extern void __iomem *of_iomap(struct device_node *device, int index);
 171
 172 #endif /* __KERNEL__ */
 173 #endif /* _POWERPC_PROM_H */