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>
24 #include <asm/i8259.h>
26 __initdata u64 initial_dtb;
27 char __initdata cmd_line[COMMAND_LINE_SIZE];
29 int __initdata of_ioapic;
31 void __init early_init_dt_scan_chosen_arch(unsigned long node)
36 void __init early_init_dt_add_memory_arch(u64 base, u64 size)
41 void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align)
43 return __alloc_bootmem(size, align, __pa(MAX_DMA_ADDRESS));
46 void __init add_dtb(u64 data)
48 initial_dtb = data + offsetof(struct setup_data, data);
52 * CE4100 ids. Will be moved to machine_device_initcall() once we have it.
54 static struct of_device_id __initdata ce4100_ids[] = {
55 { .compatible = "intel,ce4100-cp", },
56 { .compatible = "isa", },
57 { .compatible = "pci", },
61 static int __init add_bus_probe(void)
63 if (!of_have_populated_dt())
66 return of_platform_bus_probe(NULL, ce4100_ids, NULL);
68 module_init(add_bus_probe);
71 struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus)
73 struct device_node *np;
75 for_each_node_by_type(np, "pci") {
79 prop = of_get_property(np, "bus-range", NULL);
82 bus_min = be32_to_cpup(prop);
83 if (bus->number == bus_min)
89 static int x86_of_pci_irq_enable(struct pci_dev *dev)
95 ret = pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin);
101 virq = of_irq_parse_and_map_pci(dev, 0, 0);
108 static void x86_of_pci_irq_disable(struct pci_dev *dev)
112 void x86_of_pci_init(void)
114 pcibios_enable_irq = x86_of_pci_irq_enable;
115 pcibios_disable_irq = x86_of_pci_irq_disable;
119 static void __init dtb_setup_hpet(void)
121 #ifdef CONFIG_HPET_TIMER
122 struct device_node *dn;
126 dn = of_find_compatible_node(NULL, NULL, "intel,ce4100-hpet");
129 ret = of_address_to_resource(dn, 0, &r);
134 hpet_address = r.start;
138 static void __init dtb_lapic_setup(void)
140 #ifdef CONFIG_X86_LOCAL_APIC
141 struct device_node *dn;
145 dn = of_find_compatible_node(NULL, NULL, "intel,ce4100-lapic");
149 ret = of_address_to_resource(dn, 0, &r);
153 /* Did the boot loader setup the local APIC ? */
155 if (apic_force_enable(r.start))
158 smp_found_config = 1;
160 register_lapic_address(r.start);
161 generic_processor_info(boot_cpu_physical_apicid,
162 GET_APIC_VERSION(apic_read(APIC_LVR)));
166 #ifdef CONFIG_X86_IO_APIC
167 static unsigned int ioapic_id;
169 static void __init dtb_add_ioapic(struct device_node *dn)
174 ret = of_address_to_resource(dn, 0, &r);
176 printk(KERN_ERR "Can't obtain address from node %s.\n",
180 mp_register_ioapic(++ioapic_id, r.start, gsi_top, NULL);
183 static void __init dtb_ioapic_setup(void)
185 struct device_node *dn;
187 for_each_compatible_node(dn, NULL, "intel,ce4100-ioapic")
194 printk(KERN_ERR "Error: No information about IO-APIC in OF.\n");
197 static void __init dtb_ioapic_setup(void) {}
200 static void __init dtb_apic_setup(void)
206 #ifdef CONFIG_OF_FLATTREE
207 static void __init x86_flattree_get_config(void)
215 map_len = max(PAGE_SIZE - (initial_dtb & ~PAGE_MASK), (u64)128);
217 initial_boot_params = dt = early_memremap(initial_dtb, map_len);
218 size = of_get_flat_dt_size();
219 if (map_len < size) {
220 early_iounmap(dt, map_len);
221 initial_boot_params = dt = early_memremap(initial_dtb, size);
225 unflatten_and_copy_device_tree();
226 early_iounmap(dt, map_len);
229 static inline void x86_flattree_get_config(void) { }
232 void __init x86_dtb_init(void)
234 x86_flattree_get_config();
236 if (!of_have_populated_dt())
243 #ifdef CONFIG_X86_IO_APIC
245 struct of_ioapic_type {
251 static struct of_ioapic_type of_ioapic_type[] =
254 .out_type = IRQ_TYPE_EDGE_RISING,
255 .trigger = IOAPIC_EDGE,
259 .out_type = IRQ_TYPE_LEVEL_LOW,
260 .trigger = IOAPIC_LEVEL,
264 .out_type = IRQ_TYPE_LEVEL_HIGH,
265 .trigger = IOAPIC_LEVEL,
269 .out_type = IRQ_TYPE_EDGE_FALLING,
270 .trigger = IOAPIC_EDGE,
275 static int ioapic_xlate(struct irq_domain *domain,
276 struct device_node *controller,
277 const u32 *intspec, u32 intsize,
278 irq_hw_number_t *out_hwirq, u32 *out_type)
280 struct io_apic_irq_attr attr;
281 struct of_ioapic_type *it;
285 if (WARN_ON(intsize < 2))
290 if (intspec[1] >= ARRAY_SIZE(of_ioapic_type))
293 it = &of_ioapic_type[intspec[1]];
295 idx = (u32) domain->host_data;
296 set_io_apic_irq_attr(&attr, idx, line, it->trigger, it->polarity);
298 rc = io_apic_setup_irq_pin_once(irq_find_mapping(domain, line),
299 cpu_to_node(0), &attr);
304 *out_type = it->out_type;
308 const struct irq_domain_ops ioapic_irq_domain_ops = {
309 .xlate = ioapic_xlate,
312 static void dt_add_ioapic_domain(unsigned int ioapic_num,
313 struct device_node *np)
315 struct irq_domain *id;
316 struct mp_ioapic_gsi *gsi_cfg;
318 int num, legacy_irqs = nr_legacy_irqs();
320 gsi_cfg = mp_ioapic_gsi_routing(ioapic_num);
321 num = gsi_cfg->gsi_end - gsi_cfg->gsi_base + 1;
323 id = irq_domain_add_linear(np, num, &ioapic_irq_domain_ops,
326 if (gsi_cfg->gsi_base == 0) {
328 * The first nr_legacy_irqs() irq descs are allocated in
329 * early_irq_init() and need just a mapping. The
330 * remaining irqs need both. All of them are preallocated
331 * and assigned so we can keep the 1:1 mapping which the ioapic
334 irq_domain_associate_many(id, 0, 0, legacy_irqs);
336 if (num > legacy_irqs) {
337 ret = irq_create_strict_mappings(id, legacy_irqs,
338 legacy_irqs, num - legacy_irqs);
340 pr_err("Error creating mapping for the "
341 "remaining IRQs: %d\n", ret);
343 irq_set_default_host(id);
345 ret = irq_create_strict_mappings(id, gsi_cfg->gsi_base, 0, num);
347 pr_err("Error creating IRQ mapping: %d\n", ret);
351 static void __init ioapic_add_ofnode(struct device_node *np)
356 ret = of_address_to_resource(np, 0, &r);
358 printk(KERN_ERR "Failed to obtain address for %s\n",
363 for (i = 0; i < nr_ioapics; i++) {
364 if (r.start == mpc_ioapic_addr(i)) {
365 dt_add_ioapic_domain(i, np);
369 printk(KERN_ERR "IOxAPIC at %s is not registered.\n", np->full_name);
372 void __init x86_add_irq_domains(void)
374 struct device_node *dp;
376 if (!of_have_populated_dt())
379 for_each_node_with_property(dp, "interrupt-controller") {
380 if (of_device_is_compatible(dp, "intel,ce4100-ioapic"))
381 ioapic_add_ofnode(dp);
385 void __init x86_add_irq_domains(void) { }