1 // SPDX-License-Identifier: GPL-2.0
3 * Architecture specific OF callbacks.
5 #include <linux/export.h>
7 #include <linux/interrupt.h>
8 #include <linux/list.h>
10 #include <linux/of_fdt.h>
11 #include <linux/of_address.h>
12 #include <linux/of_platform.h>
13 #include <linux/of_irq.h>
14 #include <linux/libfdt.h>
15 #include <linux/slab.h>
16 #include <linux/pci.h>
17 #include <linux/of_pci.h>
18 #include <linux/initrd.h>
20 #include <asm/irqdomain.h>
23 #include <asm/pci_x86.h>
24 #include <asm/setup.h>
25 #include <asm/i8259.h>
27 __initdata u64 initial_dtb;
28 char __initdata cmd_line[COMMAND_LINE_SIZE];
30 int __initdata of_ioapic;
32 void __init early_init_dt_scan_chosen_arch(unsigned long node)
37 void __init early_init_dt_add_memory_arch(u64 base, u64 size)
42 void __init add_dtb(u64 data)
44 initial_dtb = data + offsetof(struct setup_data, data);
48 * CE4100 ids. Will be moved to machine_device_initcall() once we have it.
50 static struct of_device_id __initdata ce4100_ids[] = {
51 { .compatible = "intel,ce4100-cp", },
52 { .compatible = "isa", },
53 { .compatible = "pci", },
57 static int __init add_bus_probe(void)
59 if (!of_have_populated_dt())
62 return of_platform_bus_probe(NULL, ce4100_ids, NULL);
64 device_initcall(add_bus_probe);
67 struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus)
69 struct device_node *np;
71 for_each_node_by_type(np, "pci") {
75 prop = of_get_property(np, "bus-range", NULL);
78 bus_min = be32_to_cpup(prop);
79 if (bus->number == bus_min)
85 static int x86_of_pci_irq_enable(struct pci_dev *dev)
91 ret = pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin);
97 virq = of_irq_parse_and_map_pci(dev, 0, 0);
104 static void x86_of_pci_irq_disable(struct pci_dev *dev)
108 void x86_of_pci_init(void)
110 pcibios_enable_irq = x86_of_pci_irq_enable;
111 pcibios_disable_irq = x86_of_pci_irq_disable;
115 static void __init dtb_setup_hpet(void)
117 #ifdef CONFIG_HPET_TIMER
118 struct device_node *dn;
122 dn = of_find_compatible_node(NULL, NULL, "intel,ce4100-hpet");
125 ret = of_address_to_resource(dn, 0, &r);
130 hpet_address = r.start;
134 #ifdef CONFIG_X86_LOCAL_APIC
136 static void __init dtb_cpu_setup(void)
138 struct device_node *dn;
139 u32 apic_id, version;
142 version = GET_APIC_VERSION(apic_read(APIC_LVR));
143 for_each_node_by_type(dn, "cpu") {
144 ret = of_property_read_u32(dn, "reg", &apic_id);
146 pr_warn("%pOF: missing local APIC ID\n", dn);
149 generic_processor_info(apic_id, version);
153 static void __init dtb_lapic_setup(void)
155 struct device_node *dn;
157 unsigned long lapic_addr = APIC_DEFAULT_PHYS_BASE;
160 dn = of_find_compatible_node(NULL, NULL, "intel,ce4100-lapic");
162 ret = of_address_to_resource(dn, 0, &r);
165 lapic_addr = r.start;
168 /* Did the boot loader setup the local APIC ? */
169 if (!boot_cpu_has(X86_FEATURE_APIC)) {
170 if (apic_force_enable(lapic_addr))
173 smp_found_config = 1;
175 register_lapic_address(lapic_addr);
178 #endif /* CONFIG_X86_LOCAL_APIC */
180 #ifdef CONFIG_X86_IO_APIC
181 static unsigned int ioapic_id;
183 struct of_ioapic_type {
189 static struct of_ioapic_type of_ioapic_type[] =
192 .out_type = IRQ_TYPE_EDGE_RISING,
193 .trigger = IOAPIC_EDGE,
197 .out_type = IRQ_TYPE_LEVEL_LOW,
198 .trigger = IOAPIC_LEVEL,
202 .out_type = IRQ_TYPE_LEVEL_HIGH,
203 .trigger = IOAPIC_LEVEL,
207 .out_type = IRQ_TYPE_EDGE_FALLING,
208 .trigger = IOAPIC_EDGE,
213 static int dt_irqdomain_alloc(struct irq_domain *domain, unsigned int virq,
214 unsigned int nr_irqs, void *arg)
216 struct irq_fwspec *fwspec = (struct irq_fwspec *)arg;
217 struct of_ioapic_type *it;
218 struct irq_alloc_info tmp;
221 if (WARN_ON(fwspec->param_count < 2))
224 type_index = fwspec->param[1];
225 if (type_index >= ARRAY_SIZE(of_ioapic_type))
228 it = &of_ioapic_type[type_index];
229 ioapic_set_alloc_attr(&tmp, NUMA_NO_NODE, it->trigger, it->polarity);
230 tmp.ioapic_id = mpc_ioapic_id(mp_irqdomain_ioapic_idx(domain));
231 tmp.ioapic_pin = fwspec->param[0];
233 return mp_irqdomain_alloc(domain, virq, nr_irqs, &tmp);
236 static const struct irq_domain_ops ioapic_irq_domain_ops = {
237 .alloc = dt_irqdomain_alloc,
238 .free = mp_irqdomain_free,
239 .activate = mp_irqdomain_activate,
240 .deactivate = mp_irqdomain_deactivate,
243 static void __init dtb_add_ioapic(struct device_node *dn)
247 struct ioapic_domain_cfg cfg = {
248 .type = IOAPIC_DOMAIN_DYNAMIC,
249 .ops = &ioapic_irq_domain_ops,
253 ret = of_address_to_resource(dn, 0, &r);
255 printk(KERN_ERR "Can't obtain address from device node %pOF.\n", dn);
258 mp_register_ioapic(++ioapic_id, r.start, gsi_top, &cfg);
261 static void __init dtb_ioapic_setup(void)
263 struct device_node *dn;
265 for_each_compatible_node(dn, NULL, "intel,ce4100-ioapic")
272 printk(KERN_ERR "Error: No information about IO-APIC in OF.\n");
275 static void __init dtb_ioapic_setup(void) {}
278 static void __init dtb_apic_setup(void)
280 #ifdef CONFIG_X86_LOCAL_APIC
287 #ifdef CONFIG_OF_EARLY_FLATTREE
288 static void __init x86_flattree_get_config(void)
296 map_len = max(PAGE_SIZE - (initial_dtb & ~PAGE_MASK), (u64)128);
298 dt = early_memremap(initial_dtb, map_len);
299 size = fdt_totalsize(dt);
300 if (map_len < size) {
301 early_memunmap(dt, map_len);
302 dt = early_memremap(initial_dtb, size);
306 early_init_dt_verify(dt);
307 unflatten_and_copy_device_tree();
308 early_memunmap(dt, map_len);
311 static inline void x86_flattree_get_config(void) { }
314 void __init x86_dtb_init(void)
316 x86_flattree_get_config();
318 if (!of_have_populated_dt())