arch/microblaze/include/asm/prom.h

   1 /*
   2  * Definitions for talking to the Open Firmware PROM on
   3  * Power Macintosh computers.
   4  *
   5  * Copyright (C) 1996-2005 Paul Mackerras.
   6  *
   7  * Updates for PPC64 by Peter Bergner & David Engebretsen, IBM Corp.
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU General Public License
  11  * as published by the Free Software Foundation; either version
  12  * 2 of the License, or (at your option) any later version.
  13  */
  14
  15 #include <linux/of.h>   /* linux/of.h gets to determine #include ordering */
  16
  17 #ifndef _ASM_MICROBLAZE_PROM_H
  18 #define _ASM_MICROBLAZE_PROM_H
  19 #ifdef __KERNEL__
  20 #ifndef __ASSEMBLY__
  21
  22 #include <linux/types.h>
  23 #include <linux/of_irq.h>
  24 #include <linux/of_fdt.h>
  25 #include <linux/proc_fs.h>
  26 #include <linux/platform_device.h>
  27 #include <asm/irq.h>
  28 #include <asm/atomic.h>
  29
  30 #define HAVE_ARCH_DEVTREE_FIXUPS
  31
  32 /* Other Prototypes */
  33 extern int early_uartlite_console(void);
  34
  35 #ifdef CONFIG_PCI
  36 /*
  37  * PCI <-> OF matching functions
  38  * (XXX should these be here?)
  39  */
  40 struct pci_bus;
  41 struct pci_dev;
  42 extern int pci_device_from_OF_node(struct device_node *node,
  43                                         u8 *bus, u8 *devfn);
  44 extern struct device_node *pci_busdev_to_OF_node(struct pci_bus *bus,
  45                                                         int devfn);
  46 extern struct device_node *pci_device_to_OF_node(struct pci_dev *dev);
  47 extern void pci_create_OF_bus_map(void);
  48 #endif
  49
  50 /*
  51  * OF address retreival & translation
  52  */
  53
  54 /* Translate an OF address block into a CPU physical address
  55  */
  56 extern u64 of_translate_address(struct device_node *np, const u32 *addr);
  57
  58 /* Extract an address from a device, returns the region size and
  59  * the address space flags too. The PCI version uses a BAR number
  60  * instead of an absolute index
  61  */
  62 extern const u32 *of_get_address(struct device_node *dev, int index,
  63                         u64 *size, unsigned int *flags);
  64 extern const u32 *of_get_pci_address(struct device_node *dev, int bar_no,
  65                         u64 *size, unsigned int *flags);
  66
  67 /* Get an address as a resource. Note that if your address is
  68  * a PIO address, the conversion will fail if the physical address
  69  * can't be internally converted to an IO token with
  70  * pci_address_to_pio(), that is because it's either called to early
  71  * or it can't be matched to any host bridge IO space
  72  */
  73 extern int of_address_to_resource(struct device_node *dev, int index,
  74                                 struct resource *r);
  75 extern int of_pci_address_to_resource(struct device_node *dev, int bar,
  76                                 struct resource *r);
  77
  78 /* Parse the ibm,dma-window property of an OF node into the busno, phys and
  79  * size parameters.
  80  */
  81 void of_parse_dma_window(struct device_node *dn, const void *dma_window_prop,
  82                 unsigned long *busno, unsigned long *phys, unsigned long *size);
  83
  84 extern void kdump_move_device_tree(void);
  85
  86 /* CPU OF node matching */
  87 struct device_node *of_get_cpu_node(int cpu, unsigned int *thread);
  88
  89 /* Get the MAC address */
  90 extern const void *of_get_mac_address(struct device_node *np);
  91
  92 /*
  93  * OF interrupt mapping
  94  */
  95
  96 /**
  97  * of_irq_map_init - Initialize the irq remapper
  98  * @flags:      flags defining workarounds to enable
  99  *
 100  * Some machines have bugs in the device-tree which require certain workarounds
 101  * to be applied. Call this before any interrupt mapping attempts to enable
 102  * those workarounds.
 103  */
 104 #define OF_IMAP_OLDWORLD_MAC    0x00000001
 105 #define OF_IMAP_NO_PHANDLE      0x00000002
 106
 107 extern void of_irq_map_init(unsigned int flags);
 108
 109 /**
 110  * of_irq_map_raw - Low level interrupt tree parsing
 111  * @parent:     the device interrupt parent
 112  * @intspec:    interrupt specifier ("interrupts" property of the device)
 113  * @ointsize:   size of the passed in interrupt specifier
 114  * @addr:       address specifier (start of "reg" property of the device)
 115  * @out_irq:    structure of_irq filled by this function
 116  *
 117  * Returns 0 on success and a negative number on error
 118  *
 119  * This function is a low-level interrupt tree walking function. It
 120  * can be used to do a partial walk with synthetized reg and interrupts
 121  * properties, for example when resolving PCI interrupts when no device
 122  * node exist for the parent.
 123  *
 124  */
 125
 126 extern int of_irq_map_raw(struct device_node *parent, const u32 *intspec,
 127                         u32 ointsize, const u32 *addr,
 128                         struct of_irq *out_irq);
 129
 130 /**
 131  * of_irq_map_pci - Resolve the interrupt for a PCI device
 132  * @pdev:       the device whose interrupt is to be resolved
 133  * @out_irq:    structure of_irq filled by this function
 134  *
 135  * This function resolves the PCI interrupt for a given PCI device. If a
 136  * device-node exists for a given pci_dev, it will use normal OF tree
 137  * walking. If not, it will implement standard swizzling and walk up the
 138  * PCI tree until an device-node is found, at which point it will finish
 139  * resolving using the OF tree walking.
 140  */
 141 struct pci_dev;
 142 extern int of_irq_map_pci(struct pci_dev *pdev, struct of_irq *out_irq);
 143
 144 extern int of_irq_to_resource(struct device_node *dev, int index,
 145                         struct resource *r);
 146
 147 /**
 148  * of_iomap - Maps the memory mapped IO for a given device_node
 149  * @device:     the device whose io range will be mapped
 150  * @index:      index of the io range
 151  *
 152  * Returns a pointer to the mapped memory
 153  */
 154 extern void __iomem *of_iomap(struct device_node *device, int index);
 155
 156 #endif /* __ASSEMBLY__ */
 157 #endif /* __KERNEL__ */
 158 #endif /* _ASM_MICROBLAZE_PROM_H */