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2
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4
5#include <linux/bootmem.h>
6#include <linux/export.h>
7#include <linux/io.h>
8#include <linux/interrupt.h>
9#include <linux/list.h>
10#include <linux/of.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>
19
20#include <asm/irqdomain.h>
21#include <asm/hpet.h>
22#include <asm/apic.h>
23#include <asm/pci_x86.h>
24#include <asm/setup.h>
25#include <asm/i8259.h>
26
27__initdata u64 initial_dtb;
28char __initdata cmd_line[COMMAND_LINE_SIZE];
29
30int __initdata of_ioapic;
31
32void __init early_init_dt_scan_chosen_arch(unsigned long node)
33{
34 BUG();
35}
36
37void __init early_init_dt_add_memory_arch(u64 base, u64 size)
38{
39 BUG();
40}
41
42void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align)
43{
44 return __alloc_bootmem(size, align, __pa(MAX_DMA_ADDRESS));
45}
46
47void __init add_dtb(u64 data)
48{
49 initial_dtb = data + offsetof(struct setup_data, data);
50}
51
52
53
54
55static struct of_device_id __initdata ce4100_ids[] = {
56 { .compatible = "intel,ce4100-cp", },
57 { .compatible = "isa", },
58 { .compatible = "pci", },
59 {},
60};
61
62static int __init add_bus_probe(void)
63{
64 if (!of_have_populated_dt())
65 return 0;
66
67 return of_platform_bus_probe(NULL, ce4100_ids, NULL);
68}
69device_initcall(add_bus_probe);
70
71#ifdef CONFIG_PCI
72struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus)
73{
74 struct device_node *np;
75
76 for_each_node_by_type(np, "pci") {
77 const void *prop;
78 unsigned int bus_min;
79
80 prop = of_get_property(np, "bus-range", NULL);
81 if (!prop)
82 continue;
83 bus_min = be32_to_cpup(prop);
84 if (bus->number == bus_min)
85 return np;
86 }
87 return NULL;
88}
89
90static int x86_of_pci_irq_enable(struct pci_dev *dev)
91{
92 u32 virq;
93 int ret;
94 u8 pin;
95
96 ret = pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin);
97 if (ret)
98 return ret;
99 if (!pin)
100 return 0;
101
102 virq = of_irq_parse_and_map_pci(dev, 0, 0);
103 if (virq == 0)
104 return -EINVAL;
105 dev->irq = virq;
106 return 0;
107}
108
109static void x86_of_pci_irq_disable(struct pci_dev *dev)
110{
111}
112
113void x86_of_pci_init(void)
114{
115 pcibios_enable_irq = x86_of_pci_irq_enable;
116 pcibios_disable_irq = x86_of_pci_irq_disable;
117}
118#endif
119
120static void __init dtb_setup_hpet(void)
121{
122#ifdef CONFIG_HPET_TIMER
123 struct device_node *dn;
124 struct resource r;
125 int ret;
126
127 dn = of_find_compatible_node(NULL, NULL, "intel,ce4100-hpet");
128 if (!dn)
129 return;
130 ret = of_address_to_resource(dn, 0, &r);
131 if (ret) {
132 WARN_ON(1);
133 return;
134 }
135 hpet_address = r.start;
136#endif
137}
138
139static void __init dtb_lapic_setup(void)
140{
141#ifdef CONFIG_X86_LOCAL_APIC
142 struct device_node *dn;
143 struct resource r;
144 int ret;
145
146 dn = of_find_compatible_node(NULL, NULL, "intel,ce4100-lapic");
147 if (!dn)
148 return;
149
150 ret = of_address_to_resource(dn, 0, &r);
151 if (WARN_ON(ret))
152 return;
153
154
155 if (!boot_cpu_has(X86_FEATURE_APIC)) {
156 if (apic_force_enable(r.start))
157 return;
158 }
159 smp_found_config = 1;
160 pic_mode = 1;
161 register_lapic_address(r.start);
162 generic_processor_info(boot_cpu_physical_apicid,
163 GET_APIC_VERSION(apic_read(APIC_LVR)));
164#endif
165}
166
167#ifdef CONFIG_X86_IO_APIC
168static unsigned int ioapic_id;
169
170struct of_ioapic_type {
171 u32 out_type;
172 u32 trigger;
173 u32 polarity;
174};
175
176static struct of_ioapic_type of_ioapic_type[] =
177{
178 {
179 .out_type = IRQ_TYPE_EDGE_RISING,
180 .trigger = IOAPIC_EDGE,
181 .polarity = 1,
182 },
183 {
184 .out_type = IRQ_TYPE_LEVEL_LOW,
185 .trigger = IOAPIC_LEVEL,
186 .polarity = 0,
187 },
188 {
189 .out_type = IRQ_TYPE_LEVEL_HIGH,
190 .trigger = IOAPIC_LEVEL,
191 .polarity = 1,
192 },
193 {
194 .out_type = IRQ_TYPE_EDGE_FALLING,
195 .trigger = IOAPIC_EDGE,
196 .polarity = 0,
197 },
198};
199
200static int dt_irqdomain_alloc(struct irq_domain *domain, unsigned int virq,
201 unsigned int nr_irqs, void *arg)
202{
203 struct of_phandle_args *irq_data = (void *)arg;
204 struct of_ioapic_type *it;
205 struct irq_alloc_info tmp;
206
207 if (WARN_ON(irq_data->args_count < 2))
208 return -EINVAL;
209 if (irq_data->args[1] >= ARRAY_SIZE(of_ioapic_type))
210 return -EINVAL;
211
212 it = &of_ioapic_type[irq_data->args[1]];
213 ioapic_set_alloc_attr(&tmp, NUMA_NO_NODE, it->trigger, it->polarity);
214 tmp.ioapic_id = mpc_ioapic_id(mp_irqdomain_ioapic_idx(domain));
215 tmp.ioapic_pin = irq_data->args[0];
216
217 return mp_irqdomain_alloc(domain, virq, nr_irqs, &tmp);
218}
219
220static const struct irq_domain_ops ioapic_irq_domain_ops = {
221 .alloc = dt_irqdomain_alloc,
222 .free = mp_irqdomain_free,
223 .activate = mp_irqdomain_activate,
224 .deactivate = mp_irqdomain_deactivate,
225};
226
227static void __init dtb_add_ioapic(struct device_node *dn)
228{
229 struct resource r;
230 int ret;
231 struct ioapic_domain_cfg cfg = {
232 .type = IOAPIC_DOMAIN_DYNAMIC,
233 .ops = &ioapic_irq_domain_ops,
234 .dev = dn,
235 };
236
237 ret = of_address_to_resource(dn, 0, &r);
238 if (ret) {
239 printk(KERN_ERR "Can't obtain address from device node %pOF.\n", dn);
240 return;
241 }
242 mp_register_ioapic(++ioapic_id, r.start, gsi_top, &cfg);
243}
244
245static void __init dtb_ioapic_setup(void)
246{
247 struct device_node *dn;
248
249 for_each_compatible_node(dn, NULL, "intel,ce4100-ioapic")
250 dtb_add_ioapic(dn);
251
252 if (nr_ioapics) {
253 of_ioapic = 1;
254 return;
255 }
256 printk(KERN_ERR "Error: No information about IO-APIC in OF.\n");
257}
258#else
259static void __init dtb_ioapic_setup(void) {}
260#endif
261
262static void __init dtb_apic_setup(void)
263{
264 dtb_lapic_setup();
265 dtb_ioapic_setup();
266}
267
268#ifdef CONFIG_OF_FLATTREE
269static void __init x86_flattree_get_config(void)
270{
271 u32 size, map_len;
272 void *dt;
273
274 if (!initial_dtb)
275 return;
276
277 map_len = max(PAGE_SIZE - (initial_dtb & ~PAGE_MASK), (u64)128);
278
279 initial_boot_params = dt = early_memremap(initial_dtb, map_len);
280 size = of_get_flat_dt_size();
281 if (map_len < size) {
282 early_memunmap(dt, map_len);
283 initial_boot_params = dt = early_memremap(initial_dtb, size);
284 map_len = size;
285 }
286
287 unflatten_and_copy_device_tree();
288 early_memunmap(dt, map_len);
289}
290#else
291static inline void x86_flattree_get_config(void) { }
292#endif
293
294void __init x86_dtb_init(void)
295{
296 x86_flattree_get_config();
297
298 if (!of_have_populated_dt())
299 return;
300
301 dtb_setup_hpet();
302 dtb_apic_setup();
303}
304
