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 */ 217