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/io_apic.h>
24 #include <asm/pci_x86.h>
25 #include <asm/setup.h>
26 #include <asm/i8259.h>
29 __initdata u64 initial_dtb;
30 char __initdata cmd_line[COMMAND_LINE_SIZE];
32 int __initdata of_ioapic;
34 void __init early_init_dt_scan_chosen_arch(unsigned long node)
39 void __init early_init_dt_add_memory_arch(u64 base, u64 size)
44 void __init add_dtb(u64 data)
46 initial_dtb = data + offsetof(struct setup_data, data);
50 * CE4100 ids. Will be moved to machine_device_initcall() once we have it.
52 static struct of_device_id __initdata ce4100_ids[] = {
53 { .compatible = "intel,ce4100-cp", },
54 { .compatible = "isa", },
55 { .compatible = "pci", },
59 static int __init add_bus_probe(void)
61 if (!of_have_populated_dt())
64 return of_platform_bus_probe(NULL, ce4100_ids, NULL);
66 device_initcall(add_bus_probe);
69 struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus)
71 struct device_node *np;
73 for_each_node_by_type(np, "pci") {
77 prop = of_get_property(np, "bus-range", NULL);
80 bus_min = be32_to_cpup(prop);
81 if (bus->number == bus_min)
87 static int x86_of_pci_irq_enable(struct pci_dev *dev)
93 ret = pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin);
99 virq = of_irq_parse_and_map_pci(dev, 0, 0);
106 static void x86_of_pci_irq_disable(struct pci_dev *dev)
110 void x86_of_pci_init(void)
112 pcibios_enable_irq = x86_of_pci_irq_enable;
113 pcibios_disable_irq = x86_of_pci_irq_disable;
117 static void __init dtb_setup_hpet(void)
119 #ifdef CONFIG_HPET_TIMER
120 struct device_node *dn;
124 dn = of_find_compatible_node(NULL, NULL, "intel,ce4100-hpet");
127 ret = of_address_to_resource(dn, 0, &r);
132 hpet_address = r.start;
136 #ifdef CONFIG_X86_LOCAL_APIC
138 static void __init dtb_cpu_setup(void)
140 struct device_node *dn;
141 u32 apic_id, version;
144 version = GET_APIC_VERSION(apic_read(APIC_LVR));
145 for_each_of_cpu_node(dn) {
146 ret = of_property_read_u32(dn, "reg", &apic_id);
148 pr_warn("%pOF: missing local APIC ID\n", dn);
151 generic_processor_info(apic_id, version);
155 static void __init dtb_lapic_setup(void)
157 struct device_node *dn;
159 unsigned long lapic_addr = APIC_DEFAULT_PHYS_BASE;
162 dn = of_find_compatible_node(NULL, NULL, "intel,ce4100-lapic");
164 ret = of_address_to_resource(dn, 0, &r);
167 lapic_addr = r.start;
170 /* Did the boot loader setup the local APIC ? */
171 if (!boot_cpu_has(X86_FEATURE_APIC)) {
172 if (apic_force_enable(lapic_addr))
175 smp_found_config = 1;
177 register_lapic_address(lapic_addr);
180 #endif /* CONFIG_X86_LOCAL_APIC */
182 #ifdef CONFIG_X86_IO_APIC
183 static unsigned int ioapic_id;
185 struct of_ioapic_type {
191 static struct of_ioapic_type of_ioapic_type[] =
194 .out_type = IRQ_TYPE_EDGE_FALLING,
199 .out_type = IRQ_TYPE_LEVEL_HIGH,
204 .out_type = IRQ_TYPE_LEVEL_LOW,
209 .out_type = IRQ_TYPE_EDGE_RISING,
215 static int dt_irqdomain_alloc(struct irq_domain *domain, unsigned int virq,
216 unsigned int nr_irqs, void *arg)
218 struct irq_fwspec *fwspec = (struct irq_fwspec *)arg;
219 struct of_ioapic_type *it;
220 struct irq_alloc_info tmp;
223 if (WARN_ON(fwspec->param_count < 2))
226 type_index = fwspec->param[1];
227 if (type_index >= ARRAY_SIZE(of_ioapic_type))
230 it = &of_ioapic_type[type_index];
231 ioapic_set_alloc_attr(&tmp, NUMA_NO_NODE, it->is_level, it->active_low);
232 tmp.devid = mpc_ioapic_id(mp_irqdomain_ioapic_idx(domain));
233 tmp.ioapic.pin = fwspec->param[0];
235 return mp_irqdomain_alloc(domain, virq, nr_irqs, &tmp);
238 static const struct irq_domain_ops ioapic_irq_domain_ops = {
239 .alloc = dt_irqdomain_alloc,
240 .free = mp_irqdomain_free,
241 .activate = mp_irqdomain_activate,
242 .deactivate = mp_irqdomain_deactivate,
245 static void __init dtb_add_ioapic(struct device_node *dn)
249 struct ioapic_domain_cfg cfg = {
250 .type = IOAPIC_DOMAIN_DYNAMIC,
251 .ops = &ioapic_irq_domain_ops,
255 ret = of_address_to_resource(dn, 0, &r);
257 printk(KERN_ERR "Can't obtain address from device node %pOF.\n", dn);
260 mp_register_ioapic(++ioapic_id, r.start, gsi_top, &cfg);
263 static void __init dtb_ioapic_setup(void)
265 struct device_node *dn;
267 for_each_compatible_node(dn, NULL, "intel,ce4100-ioapic")
274 printk(KERN_ERR "Error: No information about IO-APIC in OF.\n");
277 static void __init dtb_ioapic_setup(void) {}
280 static void __init dtb_apic_setup(void)
282 #ifdef CONFIG_X86_LOCAL_APIC
289 #ifdef CONFIG_OF_EARLY_FLATTREE
290 static void __init x86_flattree_get_config(void)
298 map_len = max(PAGE_SIZE - (initial_dtb & ~PAGE_MASK), (u64)128);
300 dt = early_memremap(initial_dtb, map_len);
301 size = fdt_totalsize(dt);
302 if (map_len < size) {
303 early_memunmap(dt, map_len);
304 dt = early_memremap(initial_dtb, size);
308 early_init_dt_verify(dt);
309 unflatten_and_copy_device_tree();
310 early_memunmap(dt, map_len);
313 static inline void x86_flattree_get_config(void) { }
316 void __init x86_dtb_init(void)
318 x86_flattree_get_config();
320 if (!of_have_populated_dt())