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 struct of_ioapic_type {
175 static struct of_ioapic_type of_ioapic_type[] =
178 .out_type = IRQ_TYPE_EDGE_RISING,
179 .trigger = IOAPIC_EDGE,
183 .out_type = IRQ_TYPE_LEVEL_LOW,
184 .trigger = IOAPIC_LEVEL,
188 .out_type = IRQ_TYPE_LEVEL_HIGH,
189 .trigger = IOAPIC_LEVEL,
193 .out_type = IRQ_TYPE_EDGE_FALLING,
194 .trigger = IOAPIC_EDGE,
199 static int ioapic_xlate(struct irq_domain *domain,
200 struct device_node *controller,
201 const u32 *intspec, u32 intsize,
202 irq_hw_number_t *out_hwirq, u32 *out_type)
204 struct of_ioapic_type *it;
207 if (WARN_ON(intsize < 2))
212 if (intspec[1] >= ARRAY_SIZE(of_ioapic_type))
215 it = &of_ioapic_type[intspec[1]];
217 idx = (u32)(long)domain->host_data;
218 gsi = mp_pin_to_gsi(idx, line);
219 if (mp_set_gsi_attr(gsi, it->trigger, it->polarity, cpu_to_node(0)))
223 *out_type = it->out_type;
227 const struct irq_domain_ops ioapic_irq_domain_ops = {
228 .map = mp_irqdomain_map,
229 .unmap = mp_irqdomain_unmap,
230 .xlate = ioapic_xlate,
233 static void __init dtb_add_ioapic(struct device_node *dn)
237 struct ioapic_domain_cfg cfg = {
238 .type = IOAPIC_DOMAIN_DYNAMIC,
239 .ops = &ioapic_irq_domain_ops,
243 ret = of_address_to_resource(dn, 0, &r);
245 printk(KERN_ERR "Can't obtain address from node %s.\n",
249 mp_register_ioapic(++ioapic_id, r.start, gsi_top, &cfg);
252 static void __init dtb_ioapic_setup(void)
254 struct device_node *dn;
256 for_each_compatible_node(dn, NULL, "intel,ce4100-ioapic")
263 printk(KERN_ERR "Error: No information about IO-APIC in OF.\n");
266 static void __init dtb_ioapic_setup(void) {}
269 static void __init dtb_apic_setup(void)
275 #ifdef CONFIG_OF_FLATTREE
276 static void __init x86_flattree_get_config(void)
284 map_len = max(PAGE_SIZE - (initial_dtb & ~PAGE_MASK), (u64)128);
286 initial_boot_params = dt = early_memremap(initial_dtb, map_len);
287 size = of_get_flat_dt_size();
288 if (map_len < size) {
289 early_iounmap(dt, map_len);
290 initial_boot_params = dt = early_memremap(initial_dtb, size);
294 unflatten_and_copy_device_tree();
295 early_iounmap(dt, map_len);
298 static inline void x86_flattree_get_config(void) { }
301 void __init x86_dtb_init(void)
303 x86_flattree_get_config();
305 if (!of_have_populated_dt())