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/proc_fs.h>
  22 #include <linux/platform_device.h>
  23 #include <asm/irq.h>
  24 #include <asm/atomic.h>
  25
  26 #define OF_ROOT_NODE_ADDR_CELLS_DEFAULT 1
  27 #define OF_ROOT_NODE_SIZE_CELLS_DEFAULT 1
  28
  29 #define of_compat_cmp(s1, s2, l)        strcasecmp((s1), (s2))
  30 #define of_prop_cmp(s1, s2)             strcmp((s1), (s2))
  31 #define of_node_cmp(s1, s2)             strcasecmp((s1), (s2))
  32
  33 extern struct device_node *of_chosen;
  34
  35 #define HAVE_ARCH_DEVTREE_FIXUPS
  36
  37 /* For updating the device tree at runtime */
  38 extern void of_attach_node(struct device_node *);
  39 extern void of_detach_node(struct device_node *);
  40
  41 #ifdef CONFIG_PPC32
  42 /*
  43  * PCI <-> OF matching functions
  44  * (XXX should these be here?)
  45  */
  46 struct pci_bus;
  47 struct pci_dev;
  48 extern int pci_device_from_OF_node(struct device_node *node,
  49                                    u8* bus, u8* devfn);
  50 extern struct device_node* pci_busdev_to_OF_node(struct pci_bus *, int);
  51 extern struct device_node* pci_device_to_OF_node(struct pci_dev *);
  52 extern void pci_create_OF_bus_map(void);
  53 #endif
  54
  55 extern struct resource *request_OF_resource(struct device_node* node,
  56                                 int index, const char* name_postfix);
  57 extern int release_OF_resource(struct device_node* node, int index);
  58
  59
  60 /*
  61  * OF address retreival & translation
  62  */
  63
  64 /* Translate an OF address block into a CPU physical address
  65  */
  66 extern u64 of_translate_address(struct device_node *np, const u32 *addr);
  67
  68 /* Translate a DMA address from device space to CPU space */
  69 extern u64 of_translate_dma_address(struct device_node *dev,
  70                                     const u32 *in_addr);
  71
  72 /* Extract an address from a device, returns the region size and
  73  * the address space flags too. The PCI version uses a BAR number
  74  * instead of an absolute index
  75  */
  76 extern const u32 *of_get_address(struct device_node *dev, int index,
  77                            u64 *size, unsigned int *flags);
  78 #ifdef CONFIG_PCI
  79 extern const u32 *of_get_pci_address(struct device_node *dev, int bar_no,
  80                                u64 *size, unsigned int *flags);
  81 #else
  82 static inline const u32 *of_get_pci_address(struct device_node *dev,
  83                 int bar_no, u64 *size, unsigned int *flags)
  84 {
  85         return NULL;
  86 }
  87 #endif /* CONFIG_PCI */
  88
  89 /* Get an address as a resource. Note that if your address is
  90  * a PIO address, the conversion will fail if the physical address
  91  * can't be internally converted to an IO token with
  92  * pci_address_to_pio(), that is because it's either called to early
  93  * or it can't be matched to any host bridge IO space
  94  */
  95 extern int of_address_to_resource(struct device_node *dev, int index,
  96                                   struct resource *r);
  97 #ifdef CONFIG_PCI
  98 extern int of_pci_address_to_resource(struct device_node *dev, int bar,
  99                                       struct resource *r);
 100 #else
 101 static inline int of_pci_address_to_resource(struct device_node *dev, int bar,
 102                 struct resource *r)
 103 {
 104         return -ENOSYS;
 105 }
 106 #endif /* CONFIG_PCI */
 107
 108 /* Parse the ibm,dma-window property of an OF node into the busno, phys and
 109  * size parameters.
 110  */
 111 void of_parse_dma_window(struct device_node *dn, const void *dma_window_prop,
 112                 unsigned long *busno, unsigned long *phys, unsigned long *size);
 113
 114 extern void kdump_move_device_tree(void);
 115
 116 /* CPU OF node matching */
 117 struct device_node *of_get_cpu_node(int cpu, unsigned int *thread);
 118
 119 /* cache lookup */
 120 struct device_node *of_find_next_cache_node(struct device_node *np);
 121
 122 /* Get the MAC address */
 123 extern const void *of_get_mac_address(struct device_node *np);
 124
 125 /*
 126  * OF interrupt mapping
 127  */
 128
 129 /* This structure is returned when an interrupt is mapped. The controller
 130  * field needs to be put() after use
 131  */
 132
 133 #define OF_MAX_IRQ_SPEC          4 /* We handle specifiers of at most 4 cells */
 134
 135 struct of_irq {
 136         struct device_node *controller; /* Interrupt controller node */
 137         u32 size;                       /* Specifier size */
 138         u32 specifier[OF_MAX_IRQ_SPEC]; /* Specifier copy */
 139 };
 140
 141 /**
 142  * of_irq_map_init - Initialize the irq remapper
 143  * @flags:      flags defining workarounds to enable
 144  *
 145  * Some machines have bugs in the device-tree which require certain workarounds
 146  * to be applied. Call this before any interrupt mapping attempts to enable
 147  * those workarounds.
 148  */
 149 #define OF_IMAP_OLDWORLD_MAC    0x00000001
 150 #define OF_IMAP_NO_PHANDLE      0x00000002
 151
 152 extern void of_irq_map_init(unsigned int flags);
 153
 154 /**
 155  * of_irq_map_raw - Low level interrupt tree parsing
 156  * @parent:     the device interrupt parent
 157  * @intspec:    interrupt specifier ("interrupts" property of the device)
 158  * @ointsize:   size of the passed in interrupt specifier
 159  * @addr:       address specifier (start of "reg" property of the device)
 160  * @out_irq:    structure of_irq filled by this function
 161  *
 162  * Returns 0 on success and a negative number on error
 163  *
 164  * This function is a low-level interrupt tree walking function. It
 165  * can be used to do a partial walk with synthetized reg and interrupts
 166  * properties, for example when resolving PCI interrupts when no device
 167  * node exist for the parent.
 168  *
 169  */
 170
 171 extern int of_irq_map_raw(struct device_node *parent, const u32 *intspec,
 172                           u32 ointsize, const u32 *addr,
 173                           struct of_irq *out_irq);
 174
 175
 176 /**
 177  * of_irq_map_one - Resolve an interrupt for a device
 178  * @device:     the device whose interrupt is to be resolved
 179  * @index:      index of the interrupt to resolve
 180  * @out_irq:    structure of_irq filled by this function
 181  *
 182  * This function resolves an interrupt, walking the tree, for a given
 183  * device-tree node. It's the high level pendant to of_irq_map_raw().
 184  * It also implements the workarounds for OldWolrd Macs.
 185  */
 186 extern int of_irq_map_one(struct device_node *device, int index,
 187                           struct of_irq *out_irq);
 188
 189 /**
 190  * of_irq_map_pci - Resolve the interrupt for a PCI device
 191  * @pdev:       the device whose interrupt is to be resolved
 192  * @out_irq:    structure of_irq filled by this function
 193  *
 194  * This function resolves the PCI interrupt for a given PCI device. If a
 195  * device-node exists for a given pci_dev, it will use normal OF tree
 196  * walking. If not, it will implement standard swizzling and walk up the
 197  * PCI tree until an device-node is found, at which point it will finish
 198  * resolving using the OF tree walking.
 199  */
 200 struct pci_dev;
 201 extern int of_irq_map_pci(struct pci_dev *pdev, struct of_irq *out_irq);
 202
 203 extern int of_irq_to_resource(struct device_node *dev, int index,
 204                         struct resource *r);
 205
 206 /**
 207  * of_iomap - Maps the memory mapped IO for a given device_node
 208  * @device:     the device whose io range will be mapped
 209  * @index:      index of the io range
 210  *
 211  * Returns a pointer to the mapped memory
 212  */
 213 extern void __iomem *of_iomap(struct device_node *device, int index);
 214
 215 #endif /* __KERNEL__ */
 216 #endif /* _POWERPC_PROM_H */