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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Architecture specific OF callbacks.
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/pci_x86.h>
24#include <asm/setup.h>
25#include <asm/i8259.h>
26#include <asm/prom.h>
27
28__initdata u64 initial_dtb;
29char __initdata cmd_line[COMMAND_LINE_SIZE];
30
31int __initdata of_ioapic;
32
33void __init early_init_dt_scan_chosen_arch(unsigned long node)
34{
35 BUG();
36}
37
38void __init early_init_dt_add_memory_arch(u64 base, u64 size)
39{
40 BUG();
41}
42
43void __init add_dtb(u64 data)
44{
45 initial_dtb = data + offsetof(struct setup_data, data);
46}
47
48/*
49 * CE4100 ids. Will be moved to machine_device_initcall() once we have it.
50 */
51static struct of_device_id __initdata ce4100_ids[] = {
52 { .compatible = "intel,ce4100-cp", },
53 { .compatible = "isa", },
54 { .compatible = "pci", },
55 {},
56};
57
58static int __init add_bus_probe(void)
59{
60 if (!of_have_populated_dt())
61 return 0;
62
63 return of_platform_bus_probe(NULL, ce4100_ids, NULL);
64}
65device_initcall(add_bus_probe);
66
67#ifdef CONFIG_PCI
68struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus)
69{
70 struct device_node *np;
71
72 for_each_node_by_type(np, "pci") {
73 const void *prop;
74 unsigned int bus_min;
75
76 prop = of_get_property(np, "bus-range", NULL);
77 if (!prop)
78 continue;
79 bus_min = be32_to_cpup(prop);
80 if (bus->number == bus_min)
81 return np;
82 }
83 return NULL;
84}
85
86static int x86_of_pci_irq_enable(struct pci_dev *dev)
87{
88 u32 virq;
89 int ret;
90 u8 pin;
91
92 ret = pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin);
93 if (ret)
94 return ret;
95 if (!pin)
96 return 0;
97
98 virq = of_irq_parse_and_map_pci(dev, 0, 0);
99 if (virq == 0)
100 return -EINVAL;
101 dev->irq = virq;
102 return 0;
103}
104
105static void x86_of_pci_irq_disable(struct pci_dev *dev)
106{
107}
108
109void x86_of_pci_init(void)
110{
111 pcibios_enable_irq = x86_of_pci_irq_enable;
112 pcibios_disable_irq = x86_of_pci_irq_disable;
113}
114#endif
115
116static void __init dtb_setup_hpet(void)
117{
118#ifdef CONFIG_HPET_TIMER
119 struct device_node *dn;
120 struct resource r;
121 int ret;
122
123 dn = of_find_compatible_node(NULL, NULL, "intel,ce4100-hpet");
124 if (!dn)
125 return;
126 ret = of_address_to_resource(dn, 0, &r);
127 if (ret) {
128 WARN_ON(1);
129 return;
130 }
131 hpet_address = r.start;
132#endif
133}
134
135#ifdef CONFIG_X86_LOCAL_APIC
136
137static void __init dtb_cpu_setup(void)
138{
139 struct device_node *dn;
140 u32 apic_id, version;
141 int ret;
142
143 version = GET_APIC_VERSION(apic_read(APIC_LVR));
144 for_each_of_cpu_node(dn) {
145 ret = of_property_read_u32(dn, "reg", &apic_id);
146 if (ret < 0) {
147 pr_warn("%pOF: missing local APIC ID\n", dn);
148 continue;
149 }
150 generic_processor_info(apic_id, version);
151 }
152}
153
154static void __init dtb_lapic_setup(void)
155{
156 struct device_node *dn;
157 struct resource r;
158 unsigned long lapic_addr = APIC_DEFAULT_PHYS_BASE;
159 int ret;
160
161 dn = of_find_compatible_node(NULL, NULL, "intel,ce4100-lapic");
162 if (dn) {
163 ret = of_address_to_resource(dn, 0, &r);
164 if (WARN_ON(ret))
165 return;
166 lapic_addr = r.start;
167 }
168
169 /* Did the boot loader setup the local APIC ? */
170 if (!boot_cpu_has(X86_FEATURE_APIC)) {
171 if (apic_force_enable(lapic_addr))
172 return;
173 }
174 smp_found_config = 1;
175 pic_mode = 1;
176 register_lapic_address(lapic_addr);
177}
178
179#endif /* CONFIG_X86_LOCAL_APIC */
180
181#ifdef CONFIG_X86_IO_APIC
182static unsigned int ioapic_id;
183
184struct of_ioapic_type {
185 u32 out_type;
186 u32 trigger;
187 u32 polarity;
188};
189
190static struct of_ioapic_type of_ioapic_type[] =
191{
192 {
193 .out_type = IRQ_TYPE_EDGE_RISING,
194 .trigger = IOAPIC_EDGE,
195 .polarity = 1,
196 },
197 {
198 .out_type = IRQ_TYPE_LEVEL_LOW,
199 .trigger = IOAPIC_LEVEL,
200 .polarity = 0,
201 },
202 {
203 .out_type = IRQ_TYPE_LEVEL_HIGH,
204 .trigger = IOAPIC_LEVEL,
205 .polarity = 1,
206 },
207 {
208 .out_type = IRQ_TYPE_EDGE_FALLING,
209 .trigger = IOAPIC_EDGE,
210 .polarity = 0,
211 },
212};
213
214static int dt_irqdomain_alloc(struct irq_domain *domain, unsigned int virq,
215 unsigned int nr_irqs, void *arg)
216{
217 struct irq_fwspec *fwspec = (struct irq_fwspec *)arg;
218 struct of_ioapic_type *it;
219 struct irq_alloc_info tmp;
220 int type_index;
221
222 if (WARN_ON(fwspec->param_count < 2))
223 return -EINVAL;
224
225 type_index = fwspec->param[1];
226 if (type_index >= ARRAY_SIZE(of_ioapic_type))
227 return -EINVAL;
228
229 it = &of_ioapic_type[type_index];
230 ioapic_set_alloc_attr(&tmp, NUMA_NO_NODE, it->trigger, it->polarity);
231 tmp.ioapic_id = mpc_ioapic_id(mp_irqdomain_ioapic_idx(domain));
232 tmp.ioapic_pin = fwspec->param[0];
233
234 return mp_irqdomain_alloc(domain, virq, nr_irqs, &tmp);
235}
236
237static const struct irq_domain_ops ioapic_irq_domain_ops = {
238 .alloc = dt_irqdomain_alloc,
239 .free = mp_irqdomain_free,
240 .activate = mp_irqdomain_activate,
241 .deactivate = mp_irqdomain_deactivate,
242};
243
244static void __init dtb_add_ioapic(struct device_node *dn)
245{
246 struct resource r;
247 int ret;
248 struct ioapic_domain_cfg cfg = {
249 .type = IOAPIC_DOMAIN_DYNAMIC,
250 .ops = &ioapic_irq_domain_ops,
251 .dev = dn,
252 };
253
254 ret = of_address_to_resource(dn, 0, &r);
255 if (ret) {
256 printk(KERN_ERR "Can't obtain address from device node %pOF.\n", dn);
257 return;
258 }
259 mp_register_ioapic(++ioapic_id, r.start, gsi_top, &cfg);
260}
261
262static void __init dtb_ioapic_setup(void)
263{
264 struct device_node *dn;
265
266 for_each_compatible_node(dn, NULL, "intel,ce4100-ioapic")
267 dtb_add_ioapic(dn);
268
269 if (nr_ioapics) {
270 of_ioapic = 1;
271 return;
272 }
273 printk(KERN_ERR "Error: No information about IO-APIC in OF.\n");
274}
275#else
276static void __init dtb_ioapic_setup(void) {}
277#endif
278
279static void __init dtb_apic_setup(void)
280{
281#ifdef CONFIG_X86_LOCAL_APIC
282 dtb_lapic_setup();
283 dtb_cpu_setup();
284#endif
285 dtb_ioapic_setup();
286}
287
288#ifdef CONFIG_OF_EARLY_FLATTREE
289static void __init x86_flattree_get_config(void)
290{
291 u32 size, map_len;
292 void *dt;
293
294 if (!initial_dtb)
295 return;
296
297 map_len = max(PAGE_SIZE - (initial_dtb & ~PAGE_MASK), (u64)128);
298
299 dt = early_memremap(initial_dtb, map_len);
300 size = fdt_totalsize(dt);
301 if (map_len < size) {
302 early_memunmap(dt, map_len);
303 dt = early_memremap(initial_dtb, size);
304 map_len = size;
305 }
306
307 early_init_dt_verify(dt);
308 unflatten_and_copy_device_tree();
309 early_memunmap(dt, map_len);
310}
311#else
312static inline void x86_flattree_get_config(void) { }
313#endif
314
315void __init x86_dtb_init(void)
316{
317 x86_flattree_get_config();
318
319 if (!of_have_populated_dt())
320 return;
321
322 dtb_setup_hpet();
323 dtb_apic_setup();
324}
1/*
2 * Architecture specific OF callbacks.
3 */
4#include <linux/bootmem.h>
5#include <linux/export.h>
6#include <linux/io.h>
7#include <linux/irqdomain.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/hpet.h>
21#include <asm/apic.h>
22#include <asm/pci_x86.h>
23
24__initdata u64 initial_dtb;
25char __initdata cmd_line[COMMAND_LINE_SIZE];
26
27int __initdata of_ioapic;
28
29unsigned long pci_address_to_pio(phys_addr_t address)
30{
31 /*
32 * The ioport address can be directly used by inX / outX
33 */
34 BUG_ON(address >= (1 << 16));
35 return (unsigned long)address;
36}
37EXPORT_SYMBOL_GPL(pci_address_to_pio);
38
39void __init early_init_dt_scan_chosen_arch(unsigned long node)
40{
41 BUG();
42}
43
44void __init early_init_dt_add_memory_arch(u64 base, u64 size)
45{
46 BUG();
47}
48
49void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align)
50{
51 return __alloc_bootmem(size, align, __pa(MAX_DMA_ADDRESS));
52}
53
54#ifdef CONFIG_BLK_DEV_INITRD
55void __init early_init_dt_setup_initrd_arch(unsigned long start,
56 unsigned long end)
57{
58 initrd_start = (unsigned long)__va(start);
59 initrd_end = (unsigned long)__va(end);
60 initrd_below_start_ok = 1;
61}
62#endif
63
64void __init add_dtb(u64 data)
65{
66 initial_dtb = data + offsetof(struct setup_data, data);
67}
68
69/*
70 * CE4100 ids. Will be moved to machine_device_initcall() once we have it.
71 */
72static struct of_device_id __initdata ce4100_ids[] = {
73 { .compatible = "intel,ce4100-cp", },
74 { .compatible = "isa", },
75 { .compatible = "pci", },
76 {},
77};
78
79static int __init add_bus_probe(void)
80{
81 if (!of_have_populated_dt())
82 return 0;
83
84 return of_platform_bus_probe(NULL, ce4100_ids, NULL);
85}
86module_init(add_bus_probe);
87
88#ifdef CONFIG_PCI
89struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus)
90{
91 struct device_node *np;
92
93 for_each_node_by_type(np, "pci") {
94 const void *prop;
95 unsigned int bus_min;
96
97 prop = of_get_property(np, "bus-range", NULL);
98 if (!prop)
99 continue;
100 bus_min = be32_to_cpup(prop);
101 if (bus->number == bus_min)
102 return np;
103 }
104 return NULL;
105}
106
107static int x86_of_pci_irq_enable(struct pci_dev *dev)
108{
109 struct of_irq oirq;
110 u32 virq;
111 int ret;
112 u8 pin;
113
114 ret = pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin);
115 if (ret)
116 return ret;
117 if (!pin)
118 return 0;
119
120 ret = of_irq_map_pci(dev, &oirq);
121 if (ret)
122 return ret;
123
124 virq = irq_create_of_mapping(oirq.controller, oirq.specifier,
125 oirq.size);
126 if (virq == 0)
127 return -EINVAL;
128 dev->irq = virq;
129 return 0;
130}
131
132static void x86_of_pci_irq_disable(struct pci_dev *dev)
133{
134}
135
136void __cpuinit x86_of_pci_init(void)
137{
138 pcibios_enable_irq = x86_of_pci_irq_enable;
139 pcibios_disable_irq = x86_of_pci_irq_disable;
140}
141#endif
142
143static void __init dtb_setup_hpet(void)
144{
145#ifdef CONFIG_HPET_TIMER
146 struct device_node *dn;
147 struct resource r;
148 int ret;
149
150 dn = of_find_compatible_node(NULL, NULL, "intel,ce4100-hpet");
151 if (!dn)
152 return;
153 ret = of_address_to_resource(dn, 0, &r);
154 if (ret) {
155 WARN_ON(1);
156 return;
157 }
158 hpet_address = r.start;
159#endif
160}
161
162static void __init dtb_lapic_setup(void)
163{
164#ifdef CONFIG_X86_LOCAL_APIC
165 struct device_node *dn;
166 struct resource r;
167 int ret;
168
169 dn = of_find_compatible_node(NULL, NULL, "intel,ce4100-lapic");
170 if (!dn)
171 return;
172
173 ret = of_address_to_resource(dn, 0, &r);
174 if (WARN_ON(ret))
175 return;
176
177 /* Did the boot loader setup the local APIC ? */
178 if (!cpu_has_apic) {
179 if (apic_force_enable(r.start))
180 return;
181 }
182 smp_found_config = 1;
183 pic_mode = 1;
184 register_lapic_address(r.start);
185 generic_processor_info(boot_cpu_physical_apicid,
186 GET_APIC_VERSION(apic_read(APIC_LVR)));
187#endif
188}
189
190#ifdef CONFIG_X86_IO_APIC
191static unsigned int ioapic_id;
192
193static void __init dtb_add_ioapic(struct device_node *dn)
194{
195 struct resource r;
196 int ret;
197
198 ret = of_address_to_resource(dn, 0, &r);
199 if (ret) {
200 printk(KERN_ERR "Can't obtain address from node %s.\n",
201 dn->full_name);
202 return;
203 }
204 mp_register_ioapic(++ioapic_id, r.start, gsi_top);
205}
206
207static void __init dtb_ioapic_setup(void)
208{
209 struct device_node *dn;
210
211 for_each_compatible_node(dn, NULL, "intel,ce4100-ioapic")
212 dtb_add_ioapic(dn);
213
214 if (nr_ioapics) {
215 of_ioapic = 1;
216 return;
217 }
218 printk(KERN_ERR "Error: No information about IO-APIC in OF.\n");
219}
220#else
221static void __init dtb_ioapic_setup(void) {}
222#endif
223
224static void __init dtb_apic_setup(void)
225{
226 dtb_lapic_setup();
227 dtb_ioapic_setup();
228}
229
230#ifdef CONFIG_OF_FLATTREE
231static void __init x86_flattree_get_config(void)
232{
233 u32 size, map_len;
234 void *new_dtb;
235
236 if (!initial_dtb)
237 return;
238
239 map_len = max(PAGE_SIZE - (initial_dtb & ~PAGE_MASK),
240 (u64)sizeof(struct boot_param_header));
241
242 initial_boot_params = early_memremap(initial_dtb, map_len);
243 size = be32_to_cpu(initial_boot_params->totalsize);
244 if (map_len < size) {
245 early_iounmap(initial_boot_params, map_len);
246 initial_boot_params = early_memremap(initial_dtb, size);
247 map_len = size;
248 }
249
250 new_dtb = alloc_bootmem(size);
251 memcpy(new_dtb, initial_boot_params, size);
252 early_iounmap(initial_boot_params, map_len);
253
254 initial_boot_params = new_dtb;
255
256 /* root level address cells */
257 of_scan_flat_dt(early_init_dt_scan_root, NULL);
258
259 unflatten_device_tree();
260}
261#else
262static inline void x86_flattree_get_config(void) { }
263#endif
264
265void __init x86_dtb_init(void)
266{
267 x86_flattree_get_config();
268
269 if (!of_have_populated_dt())
270 return;
271
272 dtb_setup_hpet();
273 dtb_apic_setup();
274}
275
276#ifdef CONFIG_X86_IO_APIC
277
278struct of_ioapic_type {
279 u32 out_type;
280 u32 trigger;
281 u32 polarity;
282};
283
284static struct of_ioapic_type of_ioapic_type[] =
285{
286 {
287 .out_type = IRQ_TYPE_EDGE_RISING,
288 .trigger = IOAPIC_EDGE,
289 .polarity = 1,
290 },
291 {
292 .out_type = IRQ_TYPE_LEVEL_LOW,
293 .trigger = IOAPIC_LEVEL,
294 .polarity = 0,
295 },
296 {
297 .out_type = IRQ_TYPE_LEVEL_HIGH,
298 .trigger = IOAPIC_LEVEL,
299 .polarity = 1,
300 },
301 {
302 .out_type = IRQ_TYPE_EDGE_FALLING,
303 .trigger = IOAPIC_EDGE,
304 .polarity = 0,
305 },
306};
307
308static int ioapic_xlate(struct irq_domain *domain,
309 struct device_node *controller,
310 const u32 *intspec, u32 intsize,
311 irq_hw_number_t *out_hwirq, u32 *out_type)
312{
313 struct io_apic_irq_attr attr;
314 struct of_ioapic_type *it;
315 u32 line, idx;
316 int rc;
317
318 if (WARN_ON(intsize < 2))
319 return -EINVAL;
320
321 line = intspec[0];
322
323 if (intspec[1] >= ARRAY_SIZE(of_ioapic_type))
324 return -EINVAL;
325
326 it = &of_ioapic_type[intspec[1]];
327
328 idx = (u32) domain->host_data;
329 set_io_apic_irq_attr(&attr, idx, line, it->trigger, it->polarity);
330
331 rc = io_apic_setup_irq_pin_once(irq_find_mapping(domain, line),
332 cpu_to_node(0), &attr);
333 if (rc)
334 return rc;
335
336 *out_hwirq = line;
337 *out_type = it->out_type;
338 return 0;
339}
340
341const struct irq_domain_ops ioapic_irq_domain_ops = {
342 .xlate = ioapic_xlate,
343};
344
345static void __init ioapic_add_ofnode(struct device_node *np)
346{
347 struct resource r;
348 int i, ret;
349
350 ret = of_address_to_resource(np, 0, &r);
351 if (ret) {
352 printk(KERN_ERR "Failed to obtain address for %s\n",
353 np->full_name);
354 return;
355 }
356
357 for (i = 0; i < nr_ioapics; i++) {
358 if (r.start == mpc_ioapic_addr(i)) {
359 struct irq_domain *id;
360 struct mp_ioapic_gsi *gsi_cfg;
361
362 gsi_cfg = mp_ioapic_gsi_routing(i);
363
364 id = irq_domain_add_legacy(np, 32, gsi_cfg->gsi_base, 0,
365 &ioapic_irq_domain_ops,
366 (void*)i);
367 BUG_ON(!id);
368 return;
369 }
370 }
371 printk(KERN_ERR "IOxAPIC at %s is not registered.\n", np->full_name);
372}
373
374void __init x86_add_irq_domains(void)
375{
376 struct device_node *dp;
377
378 if (!of_have_populated_dt())
379 return;
380
381 for_each_node_with_property(dp, "interrupt-controller") {
382 if (of_device_is_compatible(dp, "intel,ce4100-ioapic"))
383 ioapic_add_ofnode(dp);
384 }
385}
386#else
387void __init x86_add_irq_domains(void) { }
388#endif