2 * Architecture specific OF callbacks.
4 #include <linux/bootmem.h>
6 #include <linux/interrupt.h>
7 #include <linux/list.h>
9 #include <linux/of_fdt.h>
10 #include <linux/of_address.h>
11 #include <linux/of_platform.h>
12 #include <linux/of_irq.h>
13 #include <linux/slab.h>
14 #include <linux/pci.h>
15 #include <linux/of_pci.h>
18 #include <asm/irq_controller.h>
20 #include <asm/pci_x86.h>
22 __initdata u64 initial_dtb;
23 char __initdata cmd_line[COMMAND_LINE_SIZE];
24 static LIST_HEAD(irq_domains);
25 static DEFINE_RAW_SPINLOCK(big_irq_lock);
27 int __initdata of_ioapic;
29 #ifdef CONFIG_X86_IO_APIC
30 static void add_interrupt_host(struct irq_domain *ih)
34 raw_spin_lock_irqsave(&big_irq_lock, flags);
35 list_add(&ih->l, &irq_domains);
36 raw_spin_unlock_irqrestore(&big_irq_lock, flags);
40 static struct irq_domain *get_ih_from_node(struct device_node *controller)
42 struct irq_domain *ih, *found = NULL;
45 raw_spin_lock_irqsave(&big_irq_lock, flags);
46 list_for_each_entry(ih, &irq_domains, l) {
47 if (ih->controller == controller) {
52 raw_spin_unlock_irqrestore(&big_irq_lock, flags);
56 unsigned int irq_create_of_mapping(struct device_node *controller,
57 const u32 *intspec, unsigned int intsize)
59 struct irq_domain *ih;
63 ih = get_ih_from_node(controller);
66 ret = ih->xlate(ih, intspec, intsize, &virq, &type);
69 if (type == IRQ_TYPE_NONE)
71 irq_set_irq_type(virq, type);
74 EXPORT_SYMBOL_GPL(irq_create_of_mapping);
76 unsigned long pci_address_to_pio(phys_addr_t address)
79 * The ioport address can be directly used by inX / outX
81 BUG_ON(address >= (1 << 16));
82 return (unsigned long)address;
84 EXPORT_SYMBOL_GPL(pci_address_to_pio);
86 void __init early_init_dt_scan_chosen_arch(unsigned long node)
91 void __init early_init_dt_add_memory_arch(u64 base, u64 size)
96 void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align)
98 return __alloc_bootmem(size, align, __pa(MAX_DMA_ADDRESS));
101 void __init add_dtb(u64 data)
103 initial_dtb = data + offsetof(struct setup_data, data);
107 * CE4100 ids. Will be moved to machine_device_initcall() once we have it.
109 static struct of_device_id __initdata ce4100_ids[] = {
110 { .compatible = "intel,ce4100-cp", },
111 { .compatible = "isa", },
112 { .compatible = "pci", },
116 static int __init add_bus_probe(void)
118 if (!of_have_populated_dt())
121 return of_platform_bus_probe(NULL, ce4100_ids, NULL);
123 module_init(add_bus_probe);
126 static int x86_of_pci_irq_enable(struct pci_dev *dev)
133 ret = pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin);
139 ret = of_irq_map_pci(dev, &oirq);
143 virq = irq_create_of_mapping(oirq.controller, oirq.specifier,
151 static void x86_of_pci_irq_disable(struct pci_dev *dev)
155 void __cpuinit x86_of_pci_init(void)
157 struct device_node *np;
159 pcibios_enable_irq = x86_of_pci_irq_enable;
160 pcibios_disable_irq = x86_of_pci_irq_disable;
162 for_each_node_by_type(np, "pci") {
165 unsigned int bus_min;
166 struct device_node *child;
168 prop = of_get_property(np, "bus-range", NULL);
171 bus_min = be32_to_cpup(prop);
173 bus = pci_find_bus(0, bus_min);
175 printk(KERN_ERR "Can't find a node for bus %s.\n",
181 bus->self->dev.of_node = np;
183 bus->dev.of_node = np;
185 for_each_child_of_node(np, child) {
189 prop = of_get_property(child, "reg", NULL);
193 devfn = (be32_to_cpup(prop) >> 8) & 0xff;
194 dev = pci_get_slot(bus, devfn);
197 dev->dev.of_node = child;
204 static void __init dtb_setup_hpet(void)
206 #ifdef CONFIG_HPET_TIMER
207 struct device_node *dn;
211 dn = of_find_compatible_node(NULL, NULL, "intel,ce4100-hpet");
214 ret = of_address_to_resource(dn, 0, &r);
219 hpet_address = r.start;
223 static void __init dtb_lapic_setup(void)
225 #ifdef CONFIG_X86_LOCAL_APIC
226 struct device_node *dn;
230 dn = of_find_compatible_node(NULL, NULL, "intel,ce4100-lapic");
234 ret = of_address_to_resource(dn, 0, &r);
238 /* Did the boot loader setup the local APIC ? */
240 if (apic_force_enable(r.start))
243 smp_found_config = 1;
245 register_lapic_address(r.start);
246 generic_processor_info(boot_cpu_physical_apicid,
247 GET_APIC_VERSION(apic_read(APIC_LVR)));
251 #ifdef CONFIG_X86_IO_APIC
252 static unsigned int ioapic_id;
254 static void __init dtb_add_ioapic(struct device_node *dn)
259 ret = of_address_to_resource(dn, 0, &r);
261 printk(KERN_ERR "Can't obtain address from node %s.\n",
265 mp_register_ioapic(++ioapic_id, r.start, gsi_top);
268 static void __init dtb_ioapic_setup(void)
270 struct device_node *dn;
272 for_each_compatible_node(dn, NULL, "intel,ce4100-ioapic")
279 printk(KERN_ERR "Error: No information about IO-APIC in OF.\n");
282 static void __init dtb_ioapic_setup(void) {}
285 static void __init dtb_apic_setup(void)
291 #ifdef CONFIG_OF_FLATTREE
292 static void __init x86_flattree_get_config(void)
300 map_len = max(PAGE_SIZE - (initial_dtb & ~PAGE_MASK),
301 (u64)sizeof(struct boot_param_header));
303 initial_boot_params = early_memremap(initial_dtb, map_len);
304 size = be32_to_cpu(initial_boot_params->totalsize);
305 if (map_len < size) {
306 early_iounmap(initial_boot_params, map_len);
307 initial_boot_params = early_memremap(initial_dtb, size);
311 new_dtb = alloc_bootmem(size);
312 memcpy(new_dtb, initial_boot_params, size);
313 early_iounmap(initial_boot_params, map_len);
315 initial_boot_params = new_dtb;
317 /* root level address cells */
318 of_scan_flat_dt(early_init_dt_scan_root, NULL);
320 unflatten_device_tree();
323 static inline void x86_flattree_get_config(void) { }
326 void __init x86_dtb_init(void)
328 x86_flattree_get_config();
330 if (!of_have_populated_dt())
337 #ifdef CONFIG_X86_IO_APIC
339 struct of_ioapic_type {
345 static struct of_ioapic_type of_ioapic_type[] =
348 .out_type = IRQ_TYPE_EDGE_RISING,
349 .trigger = IOAPIC_EDGE,
353 .out_type = IRQ_TYPE_LEVEL_LOW,
354 .trigger = IOAPIC_LEVEL,
358 .out_type = IRQ_TYPE_LEVEL_HIGH,
359 .trigger = IOAPIC_LEVEL,
363 .out_type = IRQ_TYPE_EDGE_FALLING,
364 .trigger = IOAPIC_EDGE,
369 static int ioapic_xlate(struct irq_domain *id, const u32 *intspec, u32 intsize,
370 u32 *out_hwirq, u32 *out_type)
372 struct io_apic_irq_attr attr;
373 struct of_ioapic_type *it;
380 idx = (u32) id->priv;
381 *out_hwirq = line + mp_gsi_routing[idx].gsi_base;
386 if (type >= ARRAY_SIZE(of_ioapic_type))
389 it = of_ioapic_type + type;
390 *out_type = it->out_type;
392 set_io_apic_irq_attr(&attr, idx, line, it->trigger, it->polarity);
394 return io_apic_setup_irq_pin_once(*out_hwirq, cpu_to_node(0), &attr);
397 static void __init ioapic_add_ofnode(struct device_node *np)
402 ret = of_address_to_resource(np, 0, &r);
404 printk(KERN_ERR "Failed to obtain address for %s\n",
409 for (i = 0; i < nr_ioapics; i++) {
410 if (r.start == mp_ioapics[i].apicaddr) {
411 struct irq_domain *id;
413 id = kzalloc(sizeof(*id), GFP_KERNEL);
416 id->xlate = ioapic_xlate;
417 id->priv = (void *)i;
418 add_interrupt_host(id);
422 printk(KERN_ERR "IOxAPIC at %s is not registered.\n", np->full_name);
425 void __init x86_add_irq_domains(void)
427 struct device_node *dp;
429 if (!of_have_populated_dt())
432 for_each_node_with_property(dp, "interrupt-controller") {
433 if (of_device_is_compatible(dp, "intel,ce4100-ioapic"))
434 ioapic_add_ofnode(dp);
438 void __init x86_add_irq_domains(void) { }