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(unsigned long start,
58 initrd_start = (unsigned long)__va(start);
59 initrd_end = (unsigned long)__va(end);
60 initrd_below_start_ok = 1;
64 void __init add_dtb(u64 data)
66 initial_dtb = data + offsetof(struct setup_data, data);
70 * CE4100 ids. Will be moved to machine_device_initcall() once we have it.
72 static struct of_device_id __initdata ce4100_ids[] = {
73 { .compatible = "intel,ce4100-cp", },
74 { .compatible = "isa", },
75 { .compatible = "pci", },
79 static int __init add_bus_probe(void)
81 if (!of_have_populated_dt())
84 return of_platform_bus_probe(NULL, ce4100_ids, NULL);
86 module_init(add_bus_probe);
89 struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus)
91 struct device_node *np;
93 for_each_node_by_type(np, "pci") {
97 prop = of_get_property(np, "bus-range", NULL);
100 bus_min = be32_to_cpup(prop);
101 if (bus->number == bus_min)
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 pcibios_enable_irq = x86_of_pci_irq_enable;
139 pcibios_disable_irq = x86_of_pci_irq_disable;
143 static void __init dtb_setup_hpet(void)
145 #ifdef CONFIG_HPET_TIMER
146 struct device_node *dn;
150 dn = of_find_compatible_node(NULL, NULL, "intel,ce4100-hpet");
153 ret = of_address_to_resource(dn, 0, &r);
158 hpet_address = r.start;
162 static void __init dtb_lapic_setup(void)
164 #ifdef CONFIG_X86_LOCAL_APIC
165 struct device_node *dn;
169 dn = of_find_compatible_node(NULL, NULL, "intel,ce4100-lapic");
173 ret = of_address_to_resource(dn, 0, &r);
177 /* Did the boot loader setup the local APIC ? */
179 if (apic_force_enable(r.start))
182 smp_found_config = 1;
184 register_lapic_address(r.start);
185 generic_processor_info(boot_cpu_physical_apicid,
186 GET_APIC_VERSION(apic_read(APIC_LVR)));
190 #ifdef CONFIG_X86_IO_APIC
191 static unsigned int ioapic_id;
193 static void __init dtb_add_ioapic(struct device_node *dn)
198 ret = of_address_to_resource(dn, 0, &r);
200 printk(KERN_ERR "Can't obtain address from node %s.\n",
204 mp_register_ioapic(++ioapic_id, r.start, gsi_top);
207 static void __init dtb_ioapic_setup(void)
209 struct device_node *dn;
211 for_each_compatible_node(dn, NULL, "intel,ce4100-ioapic")
218 printk(KERN_ERR "Error: No information about IO-APIC in OF.\n");
221 static void __init dtb_ioapic_setup(void) {}
224 static void __init dtb_apic_setup(void)
230 #ifdef CONFIG_OF_FLATTREE
231 static void __init x86_flattree_get_config(void)
239 map_len = max(PAGE_SIZE - (initial_dtb & ~PAGE_MASK),
240 (u64)sizeof(struct boot_param_header));
242 initial_boot_params = early_memremap(initial_dtb, map_len);
243 size = be32_to_cpu(initial_boot_params->totalsize);
244 if (map_len < size) {
245 early_iounmap(initial_boot_params, map_len);
246 initial_boot_params = early_memremap(initial_dtb, size);
250 new_dtb = alloc_bootmem(size);
251 memcpy(new_dtb, initial_boot_params, size);
252 early_iounmap(initial_boot_params, map_len);
254 initial_boot_params = new_dtb;
256 /* root level address cells */
257 of_scan_flat_dt(early_init_dt_scan_root, NULL);
259 unflatten_device_tree();
262 static inline void x86_flattree_get_config(void) { }
265 void __init x86_dtb_init(void)
267 x86_flattree_get_config();
269 if (!of_have_populated_dt())
276 #ifdef CONFIG_X86_IO_APIC
278 struct of_ioapic_type {
284 static struct of_ioapic_type of_ioapic_type[] =
287 .out_type = IRQ_TYPE_EDGE_RISING,
288 .trigger = IOAPIC_EDGE,
292 .out_type = IRQ_TYPE_LEVEL_LOW,
293 .trigger = IOAPIC_LEVEL,
297 .out_type = IRQ_TYPE_LEVEL_HIGH,
298 .trigger = IOAPIC_LEVEL,
302 .out_type = IRQ_TYPE_EDGE_FALLING,
303 .trigger = IOAPIC_EDGE,
308 static int ioapic_xlate(struct irq_domain *domain,
309 struct device_node *controller,
310 const u32 *intspec, u32 intsize,
311 irq_hw_number_t *out_hwirq, u32 *out_type)
313 struct io_apic_irq_attr attr;
314 struct of_ioapic_type *it;
318 if (WARN_ON(intsize < 2))
323 if (intspec[1] >= ARRAY_SIZE(of_ioapic_type))
326 it = &of_ioapic_type[intspec[1]];
328 idx = (u32) domain->host_data;
329 set_io_apic_irq_attr(&attr, idx, line, it->trigger, it->polarity);
331 rc = io_apic_setup_irq_pin_once(irq_find_mapping(domain, line),
332 cpu_to_node(0), &attr);
337 *out_type = it->out_type;
341 const struct irq_domain_ops ioapic_irq_domain_ops = {
342 .xlate = ioapic_xlate,
345 static void dt_add_ioapic_domain(unsigned int ioapic_num,
346 struct device_node *np)
348 struct irq_domain *id;
349 struct mp_ioapic_gsi *gsi_cfg;
353 gsi_cfg = mp_ioapic_gsi_routing(ioapic_num);
354 num = gsi_cfg->gsi_end - gsi_cfg->gsi_base + 1;
356 id = irq_domain_add_linear(np, num, &ioapic_irq_domain_ops,
359 if (gsi_cfg->gsi_base == 0) {
361 * The first NR_IRQS_LEGACY irq descs are allocated in
362 * early_irq_init() and need just a mapping. The
363 * remaining irqs need both. All of them are preallocated
364 * and assigned so we can keep the 1:1 mapping which the ioapic
367 ret = irq_domain_associate_many(id, 0, 0, NR_IRQS_LEGACY);
369 pr_err("Error mapping legacy IRQs: %d\n", ret);
371 if (num > NR_IRQS_LEGACY) {
372 ret = irq_create_strict_mappings(id, NR_IRQS_LEGACY,
373 NR_IRQS_LEGACY, num - NR_IRQS_LEGACY);
375 pr_err("Error creating mapping for the "
376 "remaining IRQs: %d\n", ret);
378 irq_set_default_host(id);
380 ret = irq_create_strict_mappings(id, gsi_cfg->gsi_base, 0, num);
382 pr_err("Error creating IRQ mapping: %d\n", ret);
386 static void __init ioapic_add_ofnode(struct device_node *np)
391 ret = of_address_to_resource(np, 0, &r);
393 printk(KERN_ERR "Failed to obtain address for %s\n",
398 for (i = 0; i < nr_ioapics; i++) {
399 if (r.start == mpc_ioapic_addr(i)) {
400 dt_add_ioapic_domain(i, np);
404 printk(KERN_ERR "IOxAPIC at %s is not registered.\n", np->full_name);
407 void __init x86_add_irq_domains(void)
409 struct device_node *dp;
411 if (!of_have_populated_dt())
414 for_each_node_with_property(dp, "interrupt-controller") {
415 if (of_device_is_compatible(dp, "intel,ce4100-ioapic"))
416 ioapic_add_ofnode(dp);
420 void __init x86_add_irq_domains(void) { }