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 void add_interrupt_host(struct irq_domain *ih)
33 raw_spin_lock_irqsave(&big_irq_lock, flags);
34 list_add(&ih->l, &irq_domains);
35 raw_spin_unlock_irqrestore(&big_irq_lock, flags);
38 static struct irq_domain *get_ih_from_node(struct device_node *controller)
40 struct irq_domain *ih, *found = NULL;
43 raw_spin_lock_irqsave(&big_irq_lock, flags);
44 list_for_each_entry(ih, &irq_domains, l) {
45 if (ih->controller == controller) {
50 raw_spin_unlock_irqrestore(&big_irq_lock, flags);
54 unsigned int irq_create_of_mapping(struct device_node *controller,
55 const u32 *intspec, unsigned int intsize)
57 struct irq_domain *ih;
61 ih = get_ih_from_node(controller);
64 ret = ih->xlate(ih, intspec, intsize, &virq, &type);
67 if (type == IRQ_TYPE_NONE)
69 /* set the mask if it is different from current */
70 if (type == (irq_to_desc(virq)->status & IRQF_TRIGGER_MASK))
71 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 static int x86_of_pci_irq_enable(struct pci_dev *dev)
114 ret = pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin);
120 ret = of_irq_map_pci(dev, &oirq);
124 virq = irq_create_of_mapping(oirq.controller, oirq.specifier,
132 static void x86_of_pci_irq_disable(struct pci_dev *dev)
136 void __cpuinit x86_of_pci_init(void)
138 struct device_node *np;
140 pcibios_enable_irq = x86_of_pci_irq_enable;
141 pcibios_disable_irq = x86_of_pci_irq_disable;
143 for_each_node_by_type(np, "pci") {
146 unsigned int bus_min;
147 struct device_node *child;
149 prop = of_get_property(np, "bus-range", NULL);
152 bus_min = be32_to_cpup(prop);
154 bus = pci_find_bus(0, bus_min);
156 printk(KERN_ERR "Can't find a node for bus %s.\n",
162 bus->self->dev.of_node = np;
164 bus->dev.of_node = np;
166 for_each_child_of_node(np, child) {
170 prop = of_get_property(child, "reg", NULL);
174 devfn = (be32_to_cpup(prop) >> 8) & 0xff;
175 dev = pci_get_slot(bus, devfn);
178 dev->dev.of_node = child;
185 static void __init dtb_setup_hpet(void)
187 struct device_node *dn;
191 dn = of_find_compatible_node(NULL, NULL, "intel,ce4100-hpet");
194 ret = of_address_to_resource(dn, 0, &r);
199 hpet_address = r.start;
202 static void __init dtb_lapic_setup(void)
204 #ifdef CONFIG_X86_LOCAL_APIC
205 if (apic_force_enable())
208 smp_found_config = 1;
210 /* Required for ioapic registration */
211 set_fixmap_nocache(FIX_APIC_BASE, mp_lapic_addr);
212 if (boot_cpu_physical_apicid == -1U)
213 boot_cpu_physical_apicid = read_apic_id();
215 generic_processor_info(boot_cpu_physical_apicid,
216 GET_APIC_VERSION(apic_read(APIC_LVR)));
220 #ifdef CONFIG_X86_IO_APIC
221 static unsigned int ioapic_id;
223 static void __init dtb_add_ioapic(struct device_node *dn)
228 ret = of_address_to_resource(dn, 0, &r);
230 printk(KERN_ERR "Can't obtain address from node %s.\n",
234 mp_register_ioapic(++ioapic_id, r.start, gsi_top);
237 static void __init dtb_ioapic_setup(void)
239 struct device_node *dn;
241 if (!smp_found_config)
244 for_each_compatible_node(dn, NULL, "intel,ce4100-ioapic")
251 printk(KERN_ERR "Error: No information about IO-APIC in OF.\n");
252 smp_found_config = 0;
255 static void __init dtb_ioapic_setup(void) {}
258 static void __init dtb_apic_setup(void)
264 void __init x86_dtb_find_config(void)
267 smp_found_config = 1;
269 printk(KERN_ERR "Missing device tree!.\n");
272 void __init x86_dtb_get_config(unsigned int unused)
280 map_len = max(PAGE_SIZE - (initial_dtb & ~PAGE_MASK),
281 (u64)sizeof(struct boot_param_header));
283 initial_boot_params = early_memremap(initial_dtb, map_len);
284 size = be32_to_cpu(initial_boot_params->totalsize);
285 if (map_len < size) {
286 early_iounmap(initial_boot_params, map_len);
287 initial_boot_params = early_memremap(initial_dtb, size);
291 new_dtb = alloc_bootmem(size);
292 memcpy(new_dtb, initial_boot_params, size);
293 early_iounmap(initial_boot_params, map_len);
295 initial_boot_params = new_dtb;
297 /* root level address cells */
298 of_scan_flat_dt(early_init_dt_scan_root, NULL);
300 unflatten_device_tree();