2 * Architecture specific OF callbacks.
4 #include <linux/bootmem.h>
5 #include <linux/export.h>
7 #include <linux/irqdomain.h>
8 #include <linux/interrupt.h>
9 #include <linux/list.h>
11 #include <linux/of_fdt.h>
12 #include <linux/of_address.h>
13 #include <linux/of_platform.h>
14 #include <linux/of_irq.h>
15 #include <linux/slab.h>
16 #include <linux/pci.h>
17 #include <linux/of_pci.h>
18 #include <linux/initrd.h>
22 #include <asm/pci_x86.h>
24 __initdata u64 initial_dtb;
25 char __initdata cmd_line[COMMAND_LINE_SIZE];
27 int __initdata of_ioapic;
29 unsigned long pci_address_to_pio(phys_addr_t address)
32 * The ioport address can be directly used by inX / outX
34 BUG_ON(address >= (1 << 16));
35 return (unsigned long)address;
37 EXPORT_SYMBOL_GPL(pci_address_to_pio);
39 void __init early_init_dt_scan_chosen_arch(unsigned long node)
44 void __init early_init_dt_add_memory_arch(u64 base, u64 size)
49 void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align)
51 return __alloc_bootmem(size, align, __pa(MAX_DMA_ADDRESS));
54 #ifdef CONFIG_BLK_DEV_INITRD
55 void __init early_init_dt_setup_initrd_arch(u64 start, u64 end)
57 initrd_start = (unsigned long)__va(start);
58 initrd_end = (unsigned long)__va(end);
59 initrd_below_start_ok = 1;
63 void __init add_dtb(u64 data)
65 initial_dtb = data + offsetof(struct setup_data, data);
69 * CE4100 ids. Will be moved to machine_device_initcall() once we have it.
71 static struct of_device_id __initdata ce4100_ids[] = {
72 { .compatible = "intel,ce4100-cp", },
73 { .compatible = "isa", },
74 { .compatible = "pci", },
78 static int __init add_bus_probe(void)
80 if (!of_have_populated_dt())
83 return of_platform_bus_probe(NULL, ce4100_ids, NULL);
85 module_init(add_bus_probe);
88 struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus)
90 struct device_node *np;
92 for_each_node_by_type(np, "pci") {
96 prop = of_get_property(np, "bus-range", NULL);
99 bus_min = be32_to_cpup(prop);
100 if (bus->number == bus_min)
106 static int x86_of_pci_irq_enable(struct pci_dev *dev)
108 struct of_phandle_args oirq;
113 ret = pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin);
119 ret = of_irq_parse_pci(dev, &oirq);
123 virq = irq_create_of_mapping(&oirq);
130 static void x86_of_pci_irq_disable(struct pci_dev *dev)
134 void x86_of_pci_init(void)
136 pcibios_enable_irq = x86_of_pci_irq_enable;
137 pcibios_disable_irq = x86_of_pci_irq_disable;
141 static void __init dtb_setup_hpet(void)
143 #ifdef CONFIG_HPET_TIMER
144 struct device_node *dn;
148 dn = of_find_compatible_node(NULL, NULL, "intel,ce4100-hpet");
151 ret = of_address_to_resource(dn, 0, &r);
156 hpet_address = r.start;
160 static void __init dtb_lapic_setup(void)
162 #ifdef CONFIG_X86_LOCAL_APIC
163 struct device_node *dn;
167 dn = of_find_compatible_node(NULL, NULL, "intel,ce4100-lapic");
171 ret = of_address_to_resource(dn, 0, &r);
175 /* Did the boot loader setup the local APIC ? */
177 if (apic_force_enable(r.start))
180 smp_found_config = 1;
182 register_lapic_address(r.start);
183 generic_processor_info(boot_cpu_physical_apicid,
184 GET_APIC_VERSION(apic_read(APIC_LVR)));
188 #ifdef CONFIG_X86_IO_APIC
189 static unsigned int ioapic_id;
191 static void __init dtb_add_ioapic(struct device_node *dn)
196 ret = of_address_to_resource(dn, 0, &r);
198 printk(KERN_ERR "Can't obtain address from node %s.\n",
202 mp_register_ioapic(++ioapic_id, r.start, gsi_top);
205 static void __init dtb_ioapic_setup(void)
207 struct device_node *dn;
209 for_each_compatible_node(dn, NULL, "intel,ce4100-ioapic")
216 printk(KERN_ERR "Error: No information about IO-APIC in OF.\n");
219 static void __init dtb_ioapic_setup(void) {}
222 static void __init dtb_apic_setup(void)
228 #ifdef CONFIG_OF_FLATTREE
229 static void __init x86_flattree_get_config(void)
237 map_len = max(PAGE_SIZE - (initial_dtb & ~PAGE_MASK),
238 (u64)sizeof(struct boot_param_header));
240 initial_boot_params = early_memremap(initial_dtb, map_len);
241 size = be32_to_cpu(initial_boot_params->totalsize);
242 if (map_len < size) {
243 early_iounmap(initial_boot_params, map_len);
244 initial_boot_params = early_memremap(initial_dtb, size);
248 new_dtb = alloc_bootmem(size);
249 memcpy(new_dtb, initial_boot_params, size);
250 early_iounmap(initial_boot_params, map_len);
252 initial_boot_params = new_dtb;
254 /* root level address cells */
255 of_scan_flat_dt(early_init_dt_scan_root, NULL);
257 unflatten_device_tree();
260 static inline void x86_flattree_get_config(void) { }
263 void __init x86_dtb_init(void)
265 x86_flattree_get_config();
267 if (!of_have_populated_dt())
274 #ifdef CONFIG_X86_IO_APIC
276 struct of_ioapic_type {
282 static struct of_ioapic_type of_ioapic_type[] =
285 .out_type = IRQ_TYPE_EDGE_RISING,
286 .trigger = IOAPIC_EDGE,
290 .out_type = IRQ_TYPE_LEVEL_LOW,
291 .trigger = IOAPIC_LEVEL,
295 .out_type = IRQ_TYPE_LEVEL_HIGH,
296 .trigger = IOAPIC_LEVEL,
300 .out_type = IRQ_TYPE_EDGE_FALLING,
301 .trigger = IOAPIC_EDGE,
306 static int ioapic_xlate(struct irq_domain *domain,
307 struct device_node *controller,
308 const u32 *intspec, u32 intsize,
309 irq_hw_number_t *out_hwirq, u32 *out_type)
311 struct io_apic_irq_attr attr;
312 struct of_ioapic_type *it;
316 if (WARN_ON(intsize < 2))
321 if (intspec[1] >= ARRAY_SIZE(of_ioapic_type))
324 it = &of_ioapic_type[intspec[1]];
326 idx = (u32) domain->host_data;
327 set_io_apic_irq_attr(&attr, idx, line, it->trigger, it->polarity);
329 rc = io_apic_setup_irq_pin_once(irq_find_mapping(domain, line),
330 cpu_to_node(0), &attr);
335 *out_type = it->out_type;
339 const struct irq_domain_ops ioapic_irq_domain_ops = {
340 .xlate = ioapic_xlate,
343 static void dt_add_ioapic_domain(unsigned int ioapic_num,
344 struct device_node *np)
346 struct irq_domain *id;
347 struct mp_ioapic_gsi *gsi_cfg;
351 gsi_cfg = mp_ioapic_gsi_routing(ioapic_num);
352 num = gsi_cfg->gsi_end - gsi_cfg->gsi_base + 1;
354 id = irq_domain_add_linear(np, num, &ioapic_irq_domain_ops,
357 if (gsi_cfg->gsi_base == 0) {
359 * The first NR_IRQS_LEGACY irq descs are allocated in
360 * early_irq_init() and need just a mapping. The
361 * remaining irqs need both. All of them are preallocated
362 * and assigned so we can keep the 1:1 mapping which the ioapic
365 irq_domain_associate_many(id, 0, 0, NR_IRQS_LEGACY);
367 if (num > NR_IRQS_LEGACY) {
368 ret = irq_create_strict_mappings(id, NR_IRQS_LEGACY,
369 NR_IRQS_LEGACY, num - NR_IRQS_LEGACY);
371 pr_err("Error creating mapping for the "
372 "remaining IRQs: %d\n", ret);
374 irq_set_default_host(id);
376 ret = irq_create_strict_mappings(id, gsi_cfg->gsi_base, 0, num);
378 pr_err("Error creating IRQ mapping: %d\n", ret);
382 static void __init ioapic_add_ofnode(struct device_node *np)
387 ret = of_address_to_resource(np, 0, &r);
389 printk(KERN_ERR "Failed to obtain address for %s\n",
394 for (i = 0; i < nr_ioapics; i++) {
395 if (r.start == mpc_ioapic_addr(i)) {
396 dt_add_ioapic_domain(i, np);
400 printk(KERN_ERR "IOxAPIC at %s is not registered.\n", np->full_name);
403 void __init x86_add_irq_domains(void)
405 struct device_node *dp;
407 if (!of_have_populated_dt())
410 for_each_node_with_property(dp, "interrupt-controller") {
411 if (of_device_is_compatible(dp, "intel,ce4100-ioapic"))
412 ioapic_add_ofnode(dp);
416 void __init x86_add_irq_domains(void) { }