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>
23 #include <asm/setup.h>
25 __initdata u64 initial_dtb;
26 char __initdata cmd_line[COMMAND_LINE_SIZE];
28 int __initdata of_ioapic;
30 void __init early_init_dt_scan_chosen_arch(unsigned long node)
35 void __init early_init_dt_add_memory_arch(u64 base, u64 size)
40 void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align)
42 return __alloc_bootmem(size, align, __pa(MAX_DMA_ADDRESS));
45 void __init add_dtb(u64 data)
47 initial_dtb = data + offsetof(struct setup_data, data);
51 * CE4100 ids. Will be moved to machine_device_initcall() once we have it.
53 static struct of_device_id __initdata ce4100_ids[] = {
54 { .compatible = "intel,ce4100-cp", },
55 { .compatible = "isa", },
56 { .compatible = "pci", },
60 static int __init add_bus_probe(void)
62 if (!of_have_populated_dt())
65 return of_platform_bus_probe(NULL, ce4100_ids, NULL);
67 module_init(add_bus_probe);
70 struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus)
72 struct device_node *np;
74 for_each_node_by_type(np, "pci") {
78 prop = of_get_property(np, "bus-range", NULL);
81 bus_min = be32_to_cpup(prop);
82 if (bus->number == bus_min)
88 static int x86_of_pci_irq_enable(struct pci_dev *dev)
94 ret = pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin);
100 virq = of_irq_parse_and_map_pci(dev, 0, 0);
107 static void x86_of_pci_irq_disable(struct pci_dev *dev)
111 void x86_of_pci_init(void)
113 pcibios_enable_irq = x86_of_pci_irq_enable;
114 pcibios_disable_irq = x86_of_pci_irq_disable;
118 static void __init dtb_setup_hpet(void)
120 #ifdef CONFIG_HPET_TIMER
121 struct device_node *dn;
125 dn = of_find_compatible_node(NULL, NULL, "intel,ce4100-hpet");
128 ret = of_address_to_resource(dn, 0, &r);
133 hpet_address = r.start;
137 static void __init dtb_lapic_setup(void)
139 #ifdef CONFIG_X86_LOCAL_APIC
140 struct device_node *dn;
144 dn = of_find_compatible_node(NULL, NULL, "intel,ce4100-lapic");
148 ret = of_address_to_resource(dn, 0, &r);
152 /* Did the boot loader setup the local APIC ? */
154 if (apic_force_enable(r.start))
157 smp_found_config = 1;
159 register_lapic_address(r.start);
160 generic_processor_info(boot_cpu_physical_apicid,
161 GET_APIC_VERSION(apic_read(APIC_LVR)));
165 #ifdef CONFIG_X86_IO_APIC
166 static unsigned int ioapic_id;
168 static void __init dtb_add_ioapic(struct device_node *dn)
173 ret = of_address_to_resource(dn, 0, &r);
175 printk(KERN_ERR "Can't obtain address from node %s.\n",
179 mp_register_ioapic(++ioapic_id, r.start, gsi_top);
182 static void __init dtb_ioapic_setup(void)
184 struct device_node *dn;
186 for_each_compatible_node(dn, NULL, "intel,ce4100-ioapic")
193 printk(KERN_ERR "Error: No information about IO-APIC in OF.\n");
196 static void __init dtb_ioapic_setup(void) {}
199 static void __init dtb_apic_setup(void)
205 #ifdef CONFIG_OF_FLATTREE
206 static void __init x86_flattree_get_config(void)
214 map_len = max(PAGE_SIZE - (initial_dtb & ~PAGE_MASK), (u64)128);
216 initial_boot_params = dt = early_memremap(initial_dtb, map_len);
217 size = of_get_flat_dt_size();
218 if (map_len < size) {
219 early_iounmap(dt, map_len);
220 initial_boot_params = dt = early_memremap(initial_dtb, size);
224 unflatten_and_copy_device_tree();
225 early_iounmap(dt, map_len);
228 static inline void x86_flattree_get_config(void) { }
231 void __init x86_dtb_init(void)
233 x86_flattree_get_config();
235 if (!of_have_populated_dt())
242 #ifdef CONFIG_X86_IO_APIC
244 struct of_ioapic_type {
250 static struct of_ioapic_type of_ioapic_type[] =
253 .out_type = IRQ_TYPE_EDGE_RISING,
254 .trigger = IOAPIC_EDGE,
258 .out_type = IRQ_TYPE_LEVEL_LOW,
259 .trigger = IOAPIC_LEVEL,
263 .out_type = IRQ_TYPE_LEVEL_HIGH,
264 .trigger = IOAPIC_LEVEL,
268 .out_type = IRQ_TYPE_EDGE_FALLING,
269 .trigger = IOAPIC_EDGE,
274 static int ioapic_xlate(struct irq_domain *domain,
275 struct device_node *controller,
276 const u32 *intspec, u32 intsize,
277 irq_hw_number_t *out_hwirq, u32 *out_type)
279 struct io_apic_irq_attr attr;
280 struct of_ioapic_type *it;
284 if (WARN_ON(intsize < 2))
289 if (intspec[1] >= ARRAY_SIZE(of_ioapic_type))
292 it = &of_ioapic_type[intspec[1]];
294 idx = (u32) domain->host_data;
295 set_io_apic_irq_attr(&attr, idx, line, it->trigger, it->polarity);
297 rc = io_apic_setup_irq_pin_once(irq_find_mapping(domain, line),
298 cpu_to_node(0), &attr);
303 *out_type = it->out_type;
307 const struct irq_domain_ops ioapic_irq_domain_ops = {
308 .xlate = ioapic_xlate,
311 static void dt_add_ioapic_domain(unsigned int ioapic_num,
312 struct device_node *np)
314 struct irq_domain *id;
315 struct mp_ioapic_gsi *gsi_cfg;
319 gsi_cfg = mp_ioapic_gsi_routing(ioapic_num);
320 num = gsi_cfg->gsi_end - gsi_cfg->gsi_base + 1;
322 id = irq_domain_add_linear(np, num, &ioapic_irq_domain_ops,
325 if (gsi_cfg->gsi_base == 0) {
327 * The first NR_IRQS_LEGACY irq descs are allocated in
328 * early_irq_init() and need just a mapping. The
329 * remaining irqs need both. All of them are preallocated
330 * and assigned so we can keep the 1:1 mapping which the ioapic
333 irq_domain_associate_many(id, 0, 0, NR_IRQS_LEGACY);
335 if (num > NR_IRQS_LEGACY) {
336 ret = irq_create_strict_mappings(id, NR_IRQS_LEGACY,
337 NR_IRQS_LEGACY, num - NR_IRQS_LEGACY);
339 pr_err("Error creating mapping for the "
340 "remaining IRQs: %d\n", ret);
342 irq_set_default_host(id);
344 ret = irq_create_strict_mappings(id, gsi_cfg->gsi_base, 0, num);
346 pr_err("Error creating IRQ mapping: %d\n", ret);
350 static void __init ioapic_add_ofnode(struct device_node *np)
355 ret = of_address_to_resource(np, 0, &r);
357 printk(KERN_ERR "Failed to obtain address for %s\n",
362 for (i = 0; i < nr_ioapics; i++) {
363 if (r.start == mpc_ioapic_addr(i)) {
364 dt_add_ioapic_domain(i, np);
368 printk(KERN_ERR "IOxAPIC at %s is not registered.\n", np->full_name);
371 void __init x86_add_irq_domains(void)
373 struct device_node *dp;
375 if (!of_have_populated_dt())
378 for_each_node_with_property(dp, "interrupt-controller") {
379 if (of_device_is_compatible(dp, "intel,ce4100-ioapic"))
380 ioapic_add_ofnode(dp);
384 void __init x86_add_irq_domains(void) { }