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4
5#include <linux/export.h>
6#include <linux/io.h>
7#include <linux/interrupt.h>
8#include <linux/list.h>
9#include <linux/of.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>
19
20#include <asm/irqdomain.h>
21#include <asm/hpet.h>
22#include <asm/apic.h>
23#include <asm/io_apic.h>
24#include <asm/pci_x86.h>
25#include <asm/setup.h>
26#include <asm/i8259.h>
27#include <asm/prom.h>
28
29__initdata u64 initial_dtb;
30char __initdata cmd_line[COMMAND_LINE_SIZE];
31
32int __initdata of_ioapic;
33
34void __init early_init_dt_add_memory_arch(u64 base, u64 size)
35{
36 BUG();
37}
38
39void __init add_dtb(u64 data)
40{
41 initial_dtb = data + offsetof(struct setup_data, data);
42}
43
44
45
46
47static struct of_device_id __initdata ce4100_ids[] = {
48 { .compatible = "intel,ce4100-cp", },
49 { .compatible = "isa", },
50 { .compatible = "pci", },
51 {},
52};
53
54static int __init add_bus_probe(void)
55{
56 if (!of_have_populated_dt())
57 return 0;
58
59 return of_platform_bus_probe(NULL, ce4100_ids, NULL);
60}
61device_initcall(add_bus_probe);
62
63#ifdef CONFIG_PCI
64struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus)
65{
66 struct device_node *np;
67
68 for_each_node_by_type(np, "pci") {
69 const void *prop;
70 unsigned int bus_min;
71
72 prop = of_get_property(np, "bus-range", NULL);
73 if (!prop)
74 continue;
75 bus_min = be32_to_cpup(prop);
76 if (bus->number == bus_min)
77 return np;
78 }
79 return NULL;
80}
81
82static int x86_of_pci_irq_enable(struct pci_dev *dev)
83{
84 u32 virq;
85 int ret;
86 u8 pin;
87
88 ret = pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin);
89 if (ret)
90 return ret;
91 if (!pin)
92 return 0;
93
94 virq = of_irq_parse_and_map_pci(dev, 0, 0);
95 if (virq == 0)
96 return -EINVAL;
97 dev->irq = virq;
98 return 0;
99}
100
101static void x86_of_pci_irq_disable(struct pci_dev *dev)
102{
103}
104
105void x86_of_pci_init(void)
106{
107 pcibios_enable_irq = x86_of_pci_irq_enable;
108 pcibios_disable_irq = x86_of_pci_irq_disable;
109}
110#endif
111
112static void __init dtb_setup_hpet(void)
113{
114#ifdef CONFIG_HPET_TIMER
115 struct device_node *dn;
116 struct resource r;
117 int ret;
118
119 dn = of_find_compatible_node(NULL, NULL, "intel,ce4100-hpet");
120 if (!dn)
121 return;
122 ret = of_address_to_resource(dn, 0, &r);
123 if (ret) {
124 WARN_ON(1);
125 return;
126 }
127 hpet_address = r.start;
128#endif
129}
130
131#ifdef CONFIG_X86_LOCAL_APIC
132
133static void __init dtb_cpu_setup(void)
134{
135 struct device_node *dn;
136 u32 apic_id, version;
137
138 version = GET_APIC_VERSION(apic_read(APIC_LVR));
139 for_each_of_cpu_node(dn) {
140 apic_id = of_get_cpu_hwid(dn, 0);
141 if (apic_id == ~0U) {
142 pr_warn("%pOF: missing local APIC ID\n", dn);
143 continue;
144 }
145 generic_processor_info(apic_id, version);
146 }
147}
148
149static void __init dtb_lapic_setup(void)
150{
151 struct device_node *dn;
152 struct resource r;
153 unsigned long lapic_addr = APIC_DEFAULT_PHYS_BASE;
154 int ret;
155
156 dn = of_find_compatible_node(NULL, NULL, "intel,ce4100-lapic");
157 if (dn) {
158 ret = of_address_to_resource(dn, 0, &r);
159 if (WARN_ON(ret))
160 return;
161 lapic_addr = r.start;
162 }
163
164
165 if (!boot_cpu_has(X86_FEATURE_APIC)) {
166 if (apic_force_enable(lapic_addr))
167 return;
168 }
169 smp_found_config = 1;
170 pic_mode = 1;
171 register_lapic_address(lapic_addr);
172}
173
174#endif
175
176#ifdef CONFIG_X86_IO_APIC
177static unsigned int ioapic_id;
178
179struct of_ioapic_type {
180 u32 out_type;
181 u32 is_level;
182 u32 active_low;
183};
184
185static struct of_ioapic_type of_ioapic_type[] =
186{
187 {
188 .out_type = IRQ_TYPE_EDGE_FALLING,
189 .is_level = 0,
190 .active_low = 1,
191 },
192 {
193 .out_type = IRQ_TYPE_LEVEL_HIGH,
194 .is_level = 1,
195 .active_low = 0,
196 },
197 {
198 .out_type = IRQ_TYPE_LEVEL_LOW,
199 .is_level = 1,
200 .active_low = 1,
201 },
202 {
203 .out_type = IRQ_TYPE_EDGE_RISING,
204 .is_level = 0,
205 .active_low = 0,
206 },
207};
208
209static int dt_irqdomain_alloc(struct irq_domain *domain, unsigned int virq,
210 unsigned int nr_irqs, void *arg)
211{
212 struct irq_fwspec *fwspec = (struct irq_fwspec *)arg;
213 struct of_ioapic_type *it;
214 struct irq_alloc_info tmp;
215 int type_index;
216
217 if (WARN_ON(fwspec->param_count < 2))
218 return -EINVAL;
219
220 type_index = fwspec->param[1];
221 if (type_index >= ARRAY_SIZE(of_ioapic_type))
222 return -EINVAL;
223
224 it = &of_ioapic_type[type_index];
225 ioapic_set_alloc_attr(&tmp, NUMA_NO_NODE, it->is_level, it->active_low);
226 tmp.devid = mpc_ioapic_id(mp_irqdomain_ioapic_idx(domain));
227 tmp.ioapic.pin = fwspec->param[0];
228
229 return mp_irqdomain_alloc(domain, virq, nr_irqs, &tmp);
230}
231
232static const struct irq_domain_ops ioapic_irq_domain_ops = {
233 .alloc = dt_irqdomain_alloc,
234 .free = mp_irqdomain_free,
235 .activate = mp_irqdomain_activate,
236 .deactivate = mp_irqdomain_deactivate,
237};
238
239static void __init dtb_add_ioapic(struct device_node *dn)
240{
241 struct resource r;
242 int ret;
243 struct ioapic_domain_cfg cfg = {
244 .type = IOAPIC_DOMAIN_DYNAMIC,
245 .ops = &ioapic_irq_domain_ops,
246 .dev = dn,
247 };
248
249 ret = of_address_to_resource(dn, 0, &r);
250 if (ret) {
251 printk(KERN_ERR "Can't obtain address from device node %pOF.\n", dn);
252 return;
253 }
254 mp_register_ioapic(++ioapic_id, r.start, gsi_top, &cfg);
255}
256
257static void __init dtb_ioapic_setup(void)
258{
259 struct device_node *dn;
260
261 for_each_compatible_node(dn, NULL, "intel,ce4100-ioapic")
262 dtb_add_ioapic(dn);
263
264 if (nr_ioapics) {
265 of_ioapic = 1;
266 return;
267 }
268 printk(KERN_ERR "Error: No information about IO-APIC in OF.\n");
269}
270#else
271static void __init dtb_ioapic_setup(void) {}
272#endif
273
274static void __init dtb_apic_setup(void)
275{
276#ifdef CONFIG_X86_LOCAL_APIC
277 dtb_lapic_setup();
278 dtb_cpu_setup();
279#endif
280 dtb_ioapic_setup();
281}
282
283#ifdef CONFIG_OF_EARLY_FLATTREE
284static void __init x86_flattree_get_config(void)
285{
286 u32 size, map_len;
287 void *dt;
288
289 if (!initial_dtb)
290 return;
291
292 map_len = max(PAGE_SIZE - (initial_dtb & ~PAGE_MASK), (u64)128);
293
294 dt = early_memremap(initial_dtb, map_len);
295 size = fdt_totalsize(dt);
296 if (map_len < size) {
297 early_memunmap(dt, map_len);
298 dt = early_memremap(initial_dtb, size);
299 map_len = size;
300 }
301
302 early_init_dt_verify(dt);
303 unflatten_and_copy_device_tree();
304 early_memunmap(dt, map_len);
305}
306#else
307static inline void x86_flattree_get_config(void) { }
308#endif
309
310void __init x86_dtb_init(void)
311{
312 x86_flattree_get_config();
313
314 if (!of_have_populated_dt())
315 return;
316
317 dtb_setup_hpet();
318 dtb_apic_setup();
319}
320
