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