2 * Architecture specific OF callbacks.
4 #include <linux/bootmem.h>
6 #include <linux/interrupt.h>
7 #include <linux/list.h>
9 #include <linux/of_fdt.h>
10 #include <linux/of_address.h>
11 #include <linux/of_platform.h>
12 #include <linux/of_irq.h>
13 #include <linux/slab.h>
14 #include <linux/pci.h>
15 #include <linux/of_pci.h>
18 #include <asm/irq_controller.h>
20 #include <asm/pci_x86.h>
22 __initdata u64 initial_dtb
;
23 char __initdata cmd_line
[COMMAND_LINE_SIZE
];
24 static LIST_HEAD(irq_domains
);
25 static DEFINE_RAW_SPINLOCK(big_irq_lock
);
27 int __initdata of_ioapic
;
29 void add_interrupt_host(struct irq_domain
*ih
)
33 raw_spin_lock_irqsave(&big_irq_lock
, flags
);
34 list_add(&ih
->l
, &irq_domains
);
35 raw_spin_unlock_irqrestore(&big_irq_lock
, flags
);
38 static struct irq_domain
*get_ih_from_node(struct device_node
*controller
)
40 struct irq_domain
*ih
, *found
= NULL
;
43 raw_spin_lock_irqsave(&big_irq_lock
, flags
);
44 list_for_each_entry(ih
, &irq_domains
, l
) {
45 if (ih
->controller
== controller
) {
50 raw_spin_unlock_irqrestore(&big_irq_lock
, flags
);
54 unsigned int irq_create_of_mapping(struct device_node
*controller
,
55 const u32
*intspec
, unsigned int intsize
)
57 struct irq_domain
*ih
;
61 ih
= get_ih_from_node(controller
);
64 ret
= ih
->xlate(ih
, intspec
, intsize
, &virq
, &type
);
67 if (type
== IRQ_TYPE_NONE
)
69 /* set the mask if it is different from current */
70 if (type
== (irq_to_desc(virq
)->status
& IRQF_TRIGGER_MASK
))
71 set_irq_type(virq
, type
);
74 EXPORT_SYMBOL_GPL(irq_create_of_mapping
);
76 unsigned long pci_address_to_pio(phys_addr_t address
)
79 * The ioport address can be directly used by inX / outX
81 BUG_ON(address
>= (1 << 16));
82 return (unsigned long)address
;
84 EXPORT_SYMBOL_GPL(pci_address_to_pio
);
86 void __init
early_init_dt_scan_chosen_arch(unsigned long node
)
91 void __init
early_init_dt_add_memory_arch(u64 base
, u64 size
)
96 void * __init
early_init_dt_alloc_memory_arch(u64 size
, u64 align
)
98 return __alloc_bootmem(size
, align
, __pa(MAX_DMA_ADDRESS
));
101 void __init
add_dtb(u64 data
)
103 initial_dtb
= data
+ offsetof(struct setup_data
, data
);
107 * CE4100 ids. Will be moved to machine_device_initcall() once we have it.
109 static struct of_device_id __initdata ce4100_ids
[] = {
110 { .compatible
= "intel,ce4100-cp", },
111 { .compatible
= "isa", },
112 { .compatible
= "pci", },
116 static int __init
add_bus_probe(void)
118 if (!initial_boot_params
)
121 return of_platform_bus_probe(NULL
, ce4100_ids
, NULL
);
123 module_init(add_bus_probe
);
126 static int x86_of_pci_irq_enable(struct pci_dev
*dev
)
133 ret
= pci_read_config_byte(dev
, PCI_INTERRUPT_PIN
, &pin
);
139 ret
= of_irq_map_pci(dev
, &oirq
);
143 virq
= irq_create_of_mapping(oirq
.controller
, oirq
.specifier
,
151 static void x86_of_pci_irq_disable(struct pci_dev
*dev
)
155 void __cpuinit
x86_of_pci_init(void)
157 struct device_node
*np
;
159 pcibios_enable_irq
= x86_of_pci_irq_enable
;
160 pcibios_disable_irq
= x86_of_pci_irq_disable
;
162 for_each_node_by_type(np
, "pci") {
165 unsigned int bus_min
;
166 struct device_node
*child
;
168 prop
= of_get_property(np
, "bus-range", NULL
);
171 bus_min
= be32_to_cpup(prop
);
173 bus
= pci_find_bus(0, bus_min
);
175 printk(KERN_ERR
"Can't find a node for bus %s.\n",
181 bus
->self
->dev
.of_node
= np
;
183 bus
->dev
.of_node
= np
;
185 for_each_child_of_node(np
, child
) {
189 prop
= of_get_property(child
, "reg", NULL
);
193 devfn
= (be32_to_cpup(prop
) >> 8) & 0xff;
194 dev
= pci_get_slot(bus
, devfn
);
197 dev
->dev
.of_node
= child
;
204 static void __init
dtb_setup_hpet(void)
206 struct device_node
*dn
;
210 dn
= of_find_compatible_node(NULL
, NULL
, "intel,ce4100-hpet");
213 ret
= of_address_to_resource(dn
, 0, &r
);
218 hpet_address
= r
.start
;
221 static void __init
dtb_lapic_setup(void)
223 #ifdef CONFIG_X86_LOCAL_APIC
224 if (apic_force_enable())
227 smp_found_config
= 1;
229 /* Required for ioapic registration */
230 set_fixmap_nocache(FIX_APIC_BASE
, mp_lapic_addr
);
231 if (boot_cpu_physical_apicid
== -1U)
232 boot_cpu_physical_apicid
= read_apic_id();
234 generic_processor_info(boot_cpu_physical_apicid
,
235 GET_APIC_VERSION(apic_read(APIC_LVR
)));
239 #ifdef CONFIG_X86_IO_APIC
240 static unsigned int ioapic_id
;
242 static void __init
dtb_add_ioapic(struct device_node
*dn
)
247 ret
= of_address_to_resource(dn
, 0, &r
);
249 printk(KERN_ERR
"Can't obtain address from node %s.\n",
253 mp_register_ioapic(++ioapic_id
, r
.start
, gsi_top
);
256 static void __init
dtb_ioapic_setup(void)
258 struct device_node
*dn
;
260 if (!smp_found_config
)
263 for_each_compatible_node(dn
, NULL
, "intel,ce4100-ioapic")
270 printk(KERN_ERR
"Error: No information about IO-APIC in OF.\n");
271 smp_found_config
= 0;
274 static void __init
dtb_ioapic_setup(void) {}
277 static void __init
dtb_apic_setup(void)
283 void __init
x86_dtb_find_config(void)
286 smp_found_config
= 1;
288 printk(KERN_ERR
"Missing device tree!.\n");
291 void __init
x86_dtb_get_config(unsigned int unused
)
299 map_len
= max(PAGE_SIZE
- (initial_dtb
& ~PAGE_MASK
),
300 (u64
)sizeof(struct boot_param_header
));
302 initial_boot_params
= early_memremap(initial_dtb
, map_len
);
303 size
= be32_to_cpu(initial_boot_params
->totalsize
);
304 if (map_len
< size
) {
305 early_iounmap(initial_boot_params
, map_len
);
306 initial_boot_params
= early_memremap(initial_dtb
, size
);
310 new_dtb
= alloc_bootmem(size
);
311 memcpy(new_dtb
, initial_boot_params
, size
);
312 early_iounmap(initial_boot_params
, map_len
);
314 initial_boot_params
= new_dtb
;
316 /* root level address cells */
317 of_scan_flat_dt(early_init_dt_scan_root
, NULL
);
319 unflatten_device_tree();
324 #ifdef CONFIG_X86_IO_APIC
326 struct of_ioapic_type
{
332 static struct of_ioapic_type of_ioapic_type
[] =
335 .out_type
= IRQ_TYPE_EDGE_RISING
,
336 .trigger
= IOAPIC_EDGE
,
340 .out_type
= IRQ_TYPE_LEVEL_LOW
,
341 .trigger
= IOAPIC_LEVEL
,
345 .out_type
= IRQ_TYPE_LEVEL_HIGH
,
346 .trigger
= IOAPIC_LEVEL
,
350 .out_type
= IRQ_TYPE_EDGE_FALLING
,
351 .trigger
= IOAPIC_EDGE
,
356 static int ioapic_xlate(struct irq_domain
*id
, const u32
*intspec
, u32 intsize
,
357 u32
*out_hwirq
, u32
*out_type
)
359 struct io_apic_irq_attr attr
;
360 struct of_ioapic_type
*it
;
367 idx
= (u32
) id
->priv
;
368 *out_hwirq
= line
+ mp_gsi_routing
[idx
].gsi_base
;
373 if (type
>= ARRAY_SIZE(of_ioapic_type
))
376 it
= of_ioapic_type
+ type
;
377 *out_type
= it
->out_type
;
379 set_io_apic_irq_attr(&attr
, idx
, line
, it
->trigger
, it
->polarity
);
381 return io_apic_setup_irq_pin(*out_hwirq
, cpu_to_node(0), &attr
);
384 static void __init
ioapic_add_ofnode(struct device_node
*np
)
389 ret
= of_address_to_resource(np
, 0, &r
);
391 printk(KERN_ERR
"Failed to obtain address for %s\n",
396 for (i
= 0; i
< nr_ioapics
; i
++) {
397 if (r
.start
== mp_ioapics
[i
].apicaddr
) {
398 struct irq_domain
*id
;
400 id
= kzalloc(sizeof(*id
), GFP_KERNEL
);
403 id
->xlate
= ioapic_xlate
;
404 id
->priv
= (void *)i
;
405 add_interrupt_host(id
);
409 printk(KERN_ERR
"IOxAPIC at %s is not registered.\n", np
->full_name
);
412 void __init
x86_add_irq_domains(void)
414 struct device_node
*dp
;
416 if (!initial_boot_params
)
419 for_each_node_with_property(dp
, "interrupt-controller") {
420 if (of_device_is_compatible(dp
, "intel,ce4100-ioapic"))
421 ioapic_add_ofnode(dp
);
425 void __init
x86_add_irq_domains(void) { }