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