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Sebastian Andrzej Siewiorda6b7372011-02-22 21:07:37 +01001/*
2 * Architecture specific OF callbacks.
3 */
4#include <linux/bootmem.h>
Paul Gortmaker69c60c82011-05-26 12:22:53 -04005#include <linux/export.h>
Sebastian Andrzej Siewiorda6b7372011-02-22 21:07:37 +01006#include <linux/io.h>
Grant Likelyb4e51852011-12-16 15:50:17 -07007#include <linux/irqdomain.h>
Sebastian Andrzej Siewior19c4f5f2011-02-22 21:07:39 +01008#include <linux/interrupt.h>
Sebastian Andrzej Siewiorda6b7372011-02-22 21:07:37 +01009#include <linux/list.h>
10#include <linux/of.h>
11#include <linux/of_fdt.h>
Sebastian Andrzej Siewior3879a6f2011-02-22 21:07:40 +010012#include <linux/of_address.h>
Sebastian Andrzej Siewiorda6b7372011-02-22 21:07:37 +010013#include <linux/of_platform.h>
Sebastian Andrzej Siewior96e0a072011-02-22 21:07:42 +010014#include <linux/of_irq.h>
Sebastian Andrzej Siewiorda6b7372011-02-22 21:07:37 +010015#include <linux/slab.h>
Sebastian Andrzej Siewior96e0a072011-02-22 21:07:42 +010016#include <linux/pci.h>
17#include <linux/of_pci.h>
Florian Fainelli977cb762011-06-06 10:15:49 +020018#include <linux/initrd.h>
Sebastian Andrzej Siewiorda6b7372011-02-22 21:07:37 +010019
Sebastian Andrzej Siewiorffb9fc62011-02-22 21:07:41 +010020#include <asm/hpet.h>
Sebastian Andrzej Siewior3879a6f2011-02-22 21:07:40 +010021#include <asm/apic.h>
Sebastian Andrzej Siewior96e0a072011-02-22 21:07:42 +010022#include <asm/pci_x86.h>
Sebastian Andrzej Siewior19c4f5f2011-02-22 21:07:39 +010023
Sebastian Andrzej Siewior3879a6f2011-02-22 21:07:40 +010024__initdata u64 initial_dtb;
Sebastian Andrzej Siewiorda6b7372011-02-22 21:07:37 +010025char __initdata cmd_line[COMMAND_LINE_SIZE];
Sebastian Andrzej Siewior19c4f5f2011-02-22 21:07:39 +010026
Sebastian Andrzej Siewior3879a6f2011-02-22 21:07:40 +010027int __initdata of_ioapic;
28
Sebastian Andrzej Siewiorda6b7372011-02-22 21:07:37 +010029unsigned 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
Florian Fainelli977cb762011-06-06 10:15:49 +020054#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
Sebastian Andrzej Siewiorda6b7372011-02-22 21:07:37 +010064void __init add_dtb(u64 data)
65{
Sebastian Andrzej Siewior3879a6f2011-02-22 21:07:40 +010066 initial_dtb = data + offsetof(struct setup_data, data);
67}
68
Sebastian Andrzej Siewior9079b352011-02-22 21:07:43 +010069/*
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{
Sebastian Andrzej Siewior4a66b1d2011-02-24 09:52:42 +010081 if (!of_have_populated_dt())
Sebastian Andrzej Siewior9079b352011-02-22 21:07:43 +010082 return 0;
83
84 return of_platform_bus_probe(NULL, ce4100_ids, NULL);
85}
86module_init(add_bus_probe);
87
Sebastian Andrzej Siewior96e0a072011-02-22 21:07:42 +010088#ifdef CONFIG_PCI
Benjamin Herrenschmidt3d5fe5a2011-04-11 11:19:09 +100089struct 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
Sebastian Andrzej Siewior96e0a072011-02-22 21:07:42 +0100107static 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{
Sebastian Andrzej Siewior96e0a072011-02-22 21:07:42 +0100138 pcibios_enable_irq = x86_of_pci_irq_enable;
139 pcibios_disable_irq = x86_of_pci_irq_disable;
Sebastian Andrzej Siewior96e0a072011-02-22 21:07:42 +0100140}
141#endif
142
Sebastian Andrzej Siewiorffb9fc62011-02-22 21:07:41 +0100143static void __init dtb_setup_hpet(void)
144{
Sebastian Andrzej Siewior4a66b1d2011-02-24 09:52:42 +0100145#ifdef CONFIG_HPET_TIMER
Sebastian Andrzej Siewiorffb9fc62011-02-22 21:07:41 +0100146 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;
Sebastian Andrzej Siewior4a66b1d2011-02-24 09:52:42 +0100159#endif
Sebastian Andrzej Siewiorffb9fc62011-02-22 21:07:41 +0100160}
161
Sebastian Andrzej Siewior3879a6f2011-02-22 21:07:40 +0100162static void __init dtb_lapic_setup(void)
163{
164#ifdef CONFIG_X86_LOCAL_APIC
Thomas Gleixnera906fda2011-02-25 16:09:31 +0100165 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)
Sebastian Andrzej Siewior3879a6f2011-02-22 21:07:40 +0100171 return;
172
Thomas Gleixnera906fda2011-02-25 16:09:31 +0100173 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 }
Sebastian Andrzej Siewior3879a6f2011-02-22 21:07:40 +0100182 smp_found_config = 1;
183 pic_mode = 1;
Thomas Gleixnera906fda2011-02-25 16:09:31 +0100184 register_lapic_address(r.start);
Sebastian Andrzej Siewior3879a6f2011-02-22 21:07:40 +0100185 generic_processor_info(boot_cpu_physical_apicid,
Thomas Gleixnera906fda2011-02-25 16:09:31 +0100186 GET_APIC_VERSION(apic_read(APIC_LVR)));
Sebastian Andrzej Siewior3879a6f2011-02-22 21:07:40 +0100187#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
Sebastian Andrzej Siewior3879a6f2011-02-22 21:07:40 +0100211 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");
Sebastian Andrzej Siewior3879a6f2011-02-22 21:07:40 +0100219}
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
Sebastian Andrzej Siewior4a66b1d2011-02-24 09:52:42 +0100230#ifdef CONFIG_OF_FLATTREE
231static void __init x86_flattree_get_config(void)
Sebastian Andrzej Siewior3879a6f2011-02-22 21:07:40 +0100232{
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();
Sebastian Andrzej Siewior4a66b1d2011-02-24 09:52:42 +0100260}
261#else
262static inline void x86_flattree_get_config(void) { }
263#endif
264
Thomas Gleixnera906fda2011-02-25 16:09:31 +0100265void __init x86_dtb_init(void)
Sebastian Andrzej Siewior4a66b1d2011-02-24 09:52:42 +0100266{
267 x86_flattree_get_config();
268
269 if (!of_have_populated_dt())
270 return;
271
Sebastian Andrzej Siewiorffb9fc62011-02-22 21:07:41 +0100272 dtb_setup_hpet();
Sebastian Andrzej Siewior3879a6f2011-02-22 21:07:40 +0100273 dtb_apic_setup();
Sebastian Andrzej Siewiorda6b7372011-02-22 21:07:37 +0100274}
Sebastian Andrzej Siewiorbcc7c122011-02-22 21:07:44 +0100275
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
Grant Likelyb4e51852011-12-16 15:50:17 -0700308static 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)
Sebastian Andrzej Siewiorbcc7c122011-02-22 21:07:44 +0100312{
313 struct io_apic_irq_attr attr;
314 struct of_ioapic_type *it;
Grant Likelyb4e51852011-12-16 15:50:17 -0700315 u32 line, idx;
316 int rc;
Sebastian Andrzej Siewiorbcc7c122011-02-22 21:07:44 +0100317
Grant Likelyb4e51852011-12-16 15:50:17 -0700318 if (WARN_ON(intsize < 2))
Sebastian Andrzej Siewiorbcc7c122011-02-22 21:07:44 +0100319 return -EINVAL;
320
Grant Likelyb4e51852011-12-16 15:50:17 -0700321 line = intspec[0];
Sebastian Andrzej Siewiorbcc7c122011-02-22 21:07:44 +0100322
Grant Likelyb4e51852011-12-16 15:50:17 -0700323 if (intspec[1] >= ARRAY_SIZE(of_ioapic_type))
Sebastian Andrzej Siewiorbcc7c122011-02-22 21:07:44 +0100324 return -EINVAL;
325
Grant Likelyb4e51852011-12-16 15:50:17 -0700326 it = &of_ioapic_type[intspec[1]];
Sebastian Andrzej Siewiorbcc7c122011-02-22 21:07:44 +0100327
Grant Likelyb4e51852011-12-16 15:50:17 -0700328 idx = (u32) domain->host_data;
Sebastian Andrzej Siewiorbcc7c122011-02-22 21:07:44 +0100329 set_io_apic_irq_attr(&attr, idx, line, it->trigger, it->polarity);
330
Grant Likelyb4e51852011-12-16 15:50:17 -0700331 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;
Sebastian Andrzej Siewiorbcc7c122011-02-22 21:07:44 +0100339}
340
Grant Likelyb4e51852011-12-16 15:50:17 -0700341const struct irq_domain_ops ioapic_irq_domain_ops = {
342 .xlate = ioapic_xlate,
343};
344
Sebastian Andrzej Siewiorece32342012-08-13 22:23:33 +0200345static void dt_add_ioapic_domain(unsigned int ioapic_num,
346 struct device_node *np)
347{
348 struct irq_domain *id;
349 struct mp_ioapic_gsi *gsi_cfg;
350 int ret;
351 int num;
352
353 gsi_cfg = mp_ioapic_gsi_routing(ioapic_num);
354 num = gsi_cfg->gsi_end - gsi_cfg->gsi_base + 1;
355
356 id = irq_domain_add_linear(np, num, &ioapic_irq_domain_ops,
357 (void *)ioapic_num);
358 BUG_ON(!id);
359 if (gsi_cfg->gsi_base == 0) {
360 /*
361 * The first NR_IRQS_LEGACY irq descs are allocated in
362 * early_irq_init() and need just a mapping. The
363 * remaining irqs need both. All of them are preallocated
364 * and assigned so we can keep the 1:1 mapping which the ioapic
365 * is having.
366 */
367 ret = irq_domain_associate_many(id, 0, 0, NR_IRQS_LEGACY);
368 if (ret)
369 pr_err("Error mapping legacy IRQs: %d\n", ret);
370
371 if (num > NR_IRQS_LEGACY) {
372 ret = irq_create_strict_mappings(id, NR_IRQS_LEGACY,
373 NR_IRQS_LEGACY, num - NR_IRQS_LEGACY);
374 if (ret)
375 pr_err("Error creating mapping for the "
376 "remaining IRQs: %d\n", ret);
377 }
378 irq_set_default_host(id);
379 } else {
380 ret = irq_create_strict_mappings(id, gsi_cfg->gsi_base, 0, num);
381 if (ret)
382 pr_err("Error creating IRQ mapping: %d\n", ret);
383 }
384}
385
Sebastian Andrzej Siewiorbcc7c122011-02-22 21:07:44 +0100386static void __init ioapic_add_ofnode(struct device_node *np)
387{
388 struct resource r;
389 int i, ret;
390
391 ret = of_address_to_resource(np, 0, &r);
392 if (ret) {
393 printk(KERN_ERR "Failed to obtain address for %s\n",
394 np->full_name);
395 return;
396 }
397
398 for (i = 0; i < nr_ioapics; i++) {
Suresh Siddhad5371432011-05-18 16:31:37 -0700399 if (r.start == mpc_ioapic_addr(i)) {
Sebastian Andrzej Siewiorece32342012-08-13 22:23:33 +0200400 dt_add_ioapic_domain(i, np);
Sebastian Andrzej Siewiorbcc7c122011-02-22 21:07:44 +0100401 return;
402 }
403 }
404 printk(KERN_ERR "IOxAPIC at %s is not registered.\n", np->full_name);
405}
406
407void __init x86_add_irq_domains(void)
408{
409 struct device_node *dp;
410
Sebastian Andrzej Siewior4a66b1d2011-02-24 09:52:42 +0100411 if (!of_have_populated_dt())
Sebastian Andrzej Siewiorbcc7c122011-02-22 21:07:44 +0100412 return;
413
414 for_each_node_with_property(dp, "interrupt-controller") {
415 if (of_device_is_compatible(dp, "intel,ce4100-ioapic"))
416 ioapic_add_ofnode(dp);
417 }
418}
419#else
420void __init x86_add_irq_domains(void) { }
421#endif