int __init early_irq_init(void)
{
int i, initcnt, node = first_online_node;
struct irq_desc *desc;
init_irq_default_affinity();
/* Let arch update nr_irqs and return the nr of preallocated irqs */
initcnt = arch_probe_nr_irqs();
printk(KERN_INFO "NR_IRQS:%d nr_irqs:%d %d\n", NR_IRQS, nr_irqs, initcnt);
if (WARN_ON(nr_irqs > IRQ_BITMAP_BITS))
nr_irqs = IRQ_BITMAP_BITS;
if (WARN_ON(initcnt > IRQ_BITMAP_BITS))
initcnt = IRQ_BITMAP_BITS;
if (initcnt > nr_irqs)
nr_irqs = initcnt;
for (i = 0; i < initcnt; i++) {
desc = alloc_desc(i, node, NULL);
set_bit(i, allocated_irqs);
irq_insert_desc(i, desc);
}
return arch_early_irq_init();
}
int __init early_irq_init(void)
{
struct irq_desc *desc;
int legacy_count;
int node;
int i;
init_irq_default_affinity();
/* initialize nr_irqs based on nr_cpu_ids */
arch_probe_nr_irqs();
printk(KERN_INFO "NR_IRQS:%d nr_irqs:%d\n", NR_IRQS, nr_irqs);
desc = irq_desc_legacy;
legacy_count = ARRAY_SIZE(irq_desc_legacy);
node = first_online_node;
/* allocate based on nr_cpu_ids */
kstat_irqs_legacy = kzalloc_node(NR_IRQS_LEGACY * nr_cpu_ids *
sizeof(int), GFP_NOWAIT, node);
for (i = 0; i < legacy_count; i++) {
desc[i].irq = i;
#ifdef CONFIG_SMP
desc[i].node = node;
#endif
desc[i].kstat_irqs = kstat_irqs_legacy + i * nr_cpu_ids;
lockdep_set_class(&desc[i].lock, &irq_desc_lock_class);
alloc_desc_masks(&desc[i], node, true);
init_desc_masks(&desc[i]);
set_irq_desc(i, &desc[i]);
}
return arch_early_irq_init();
}
int __init early_irq_init(void)
{
int count, i, node = first_online_node;
struct irq_desc *desc;
init_irq_default_affinity();
#ifdef CONFIG_DEBUG_PRINTK
printk(KERN_INFO "NR_IRQS:%d\n", NR_IRQS);
#else
;
#endif
desc = irq_desc;
count = ARRAY_SIZE(irq_desc);
for (i = 0; i < count; i++) {
desc[i].kstat_irqs = alloc_percpu(unsigned int);
alloc_masks(&desc[i], GFP_KERNEL, node);
raw_spin_lock_init(&desc[i].lock);
lockdep_set_class(&desc[i].lock, &irq_desc_lock_class);
desc_set_defaults(i, &desc[i], node);
}
return arch_early_irq_init();
}
int __init early_irq_init(void)
{
struct irq_desc *desc;
int count;
int i;
init_irq_default_affinity();
printk(KERN_INFO "NR_IRQS:%d\n", NR_IRQS);
desc = irq_desc;
count = ARRAY_SIZE(irq_desc);
for (i = 0; i < count; i++) {
desc[i].irq = i;
init_alloc_desc_masks(&desc[i], 0, true);
desc[i].kstat_irqs = kstat_irqs_all[i];
}
return arch_early_irq_init();
}
int __init early_irq_init(void)
{
int count, i, node = first_online_node;
struct irq_desc *desc;
init_irq_default_affinity();
printk(KERN_INFO "NR_IRQS: %d\n", NR_IRQS);
desc = irq_desc;
count = ARRAY_SIZE(irq_desc);
for (i = 0; i < count; i++) {
desc[i].kstat_irqs = alloc_percpu(unsigned int);
alloc_masks(&desc[i], node);
raw_spin_lock_init(&desc[i].lock);
lockdep_set_class(&desc[i].lock, &irq_desc_lock_class);
mutex_init(&desc[i].request_mutex);
desc_set_defaults(i, &desc[i], node, NULL, NULL);
}
return arch_early_irq_init();
}
int __init early_irq_init(void)
{
int count, i, node = first_online_node;
struct irq_desc *desc;
init_irq_default_affinity();
printk(KERN_INFO "NR_IRQS:%d\n", NR_IRQS);
desc = irq_desc;
count = ARRAY_SIZE(irq_desc);
for (i = 0; i < count; i++) {
desc[i].irq_data.irq = i;
desc[i].irq_data.chip = &no_irq_chip;
desc[i].kstat_irqs = kstat_irqs_all[i];
alloc_masks(desc + i, GFP_KERNEL, node);
desc_smp_init(desc + i, node);
lockdep_set_class(&desc[i].lock, &irq_desc_lock_class);
}
return arch_early_irq_init();
}
int __init early_irq_init(void)
{
struct irq_desc *desc;
int legacy_count;
int node;
int i;
init_irq_default_affinity();
/* initialize nr_irqs based on nr_cpu_ids */
arch_probe_nr_irqs();
printk(KERN_INFO "NR_IRQS:%d nr_irqs:%d\n", NR_IRQS, nr_irqs);
desc = irq_desc_legacy;
legacy_count = ARRAY_SIZE(irq_desc_legacy);
node = first_online_node;
/* allocate irq_desc_ptrs array based on nr_irqs */
irq_desc_ptrs = kcalloc(nr_irqs, sizeof(void *), GFP_NOWAIT);
/* allocate based on nr_cpu_ids */
kstat_irqs_legacy = kzalloc_node(NR_IRQS_LEGACY * nr_cpu_ids *
sizeof(int), GFP_NOWAIT, node);
for (i = 0; i < legacy_count; i++) {
desc[i].irq = i;
desc[i].kstat_irqs = kstat_irqs_legacy + i * nr_cpu_ids;
lockdep_set_class(&desc[i].lock, &irq_desc_lock_class);
alloc_desc_masks(&desc[i], node, true);
init_desc_masks(&desc[i]);
irq_desc_ptrs[i] = desc + i;
}
for (i = legacy_count; i < nr_irqs; i++)
irq_desc_ptrs[i] = NULL;
return arch_early_irq_init();
}
int __init early_irq_init(void)
{
struct irq_desc *desc;
int count;
int i;
init_irq_default_affinity();
printk(KERN_INFO "NR_IRQS:%d\n", NR_IRQS);
desc = irq_desc;
count = ARRAY_SIZE(irq_desc);
for (i = 0; i < count; i++) {
desc[i].irq = i;
init_alloc_desc_masks(&desc[i], 0, true);
desc[i].kstat_irqs = kstat_irqs_all[i];
#if defined(CONFIG_RTL_819X)
memset(kstat_irqs_all, 0, NR_IRQS*NR_CPUS*sizeof(unsigned int));
#endif
}
return arch_early_irq_init();
}
int __init early_irq_init(void)
{
struct irq_desc *desc;
int legacy_count;
int i;
init_irq_default_affinity();
/* initialize nr_irqs based on nr_cpu_ids */
arch_probe_nr_irqs();
printk(KERN_INFO "NR_IRQS:%d nr_irqs:%d\n", NR_IRQS, nr_irqs);
desc = irq_desc_legacy;
legacy_count = ARRAY_SIZE(irq_desc_legacy);
/* allocate irq_desc_ptrs array based on nr_irqs */
irq_desc_ptrs = alloc_bootmem(nr_irqs * sizeof(void *));
/* allocate based on nr_cpu_ids */
/* FIXME: invert kstat_irgs, and it'd be a per_cpu_alloc'd thing */
kstat_irqs_legacy = alloc_bootmem(NR_IRQS_LEGACY * nr_cpu_ids *
sizeof(int));
for (i = 0; i < legacy_count; i++) {
desc[i].irq = i;
desc[i].kstat_irqs = kstat_irqs_legacy + i * nr_cpu_ids;
lockdep_set_class(&desc[i].lock, &irq_desc_lock_class);
init_alloc_desc_masks(&desc[i], 0, true);
irq_desc_ptrs[i] = desc + i;
}
for (i = legacy_count; i < nr_irqs; i++)
irq_desc_ptrs[i] = NULL;
return arch_early_irq_init();
}
// ARM10C 20141004
int __init early_irq_init(void)
{
// first_online_node: 0
int i, initcnt, node = first_online_node;
// node: 0
struct irq_desc *desc;
init_irq_default_affinity();
// init_irq_default_affinity에서 한일:
// irq_default_affinity->bits[0]: 0xF
/* Let arch update nr_irqs and return the nr of preallocated irqs */
// arch_probe_nr_irqs(): 16
initcnt = arch_probe_nr_irqs();
// initcnt: 16
// NR_IRQS: 16, nr_irqs: 16, initcnt: 16
printk(KERN_INFO "NR_IRQS:%d nr_irqs:%d %d\n", NR_IRQS, nr_irqs, initcnt);
// "NR_IRQS:16 nr_irqs:16 16"
// nr_irqs: 16, IRQ_BITMAP_BITS: 8212
if (WARN_ON(nr_irqs > IRQ_BITMAP_BITS))
nr_irqs = IRQ_BITMAP_BITS;
// initcnt: 16, IRQ_BITMAP_BITS: 8212
if (WARN_ON(initcnt > IRQ_BITMAP_BITS))
initcnt = IRQ_BITMAP_BITS;
// initcnt: 16, nr_irqs: 16
if (initcnt > nr_irqs)
nr_irqs = initcnt;
// initcnt: 16
for (i = 0; i < initcnt; i++) {
// i: 0, node: 0
// alloc_desc(0, 0, NULL): kmem_cache#28-o0
desc = alloc_desc(i, node, NULL);
// desc: kmem_cache#28-o0
// alloc_desc(0)에서 한일:
// (kmem_cache#28-o0)->kstat_irqs: pcp 4 byte 공간
// (kmem_cache#28-o0)->lock 을 이용한 spinlock 초기화 수행
// (kmem_cache#28-o0)->irq_data.irq: 0
// (kmem_cache#28-o0)->irq_data.chip: &no_irq_chip
// (kmem_cache#28-o0)->irq_data.chip_data: NULL
// (kmem_cache#28-o0)->irq_data.handler_data: NULL
// (kmem_cache#28-o0)->irq_data.msi_desc: NULL
// (kmem_cache#28-o0)->status_use_accessors: 0xc00
// (&(kmem_cache#28-o0)->irq_data)->state_use_accessors: 0x10000
// (kmem_cache#28-o0)->handle_irq: handle_bad_irq
// (kmem_cache#28-o0)->depth: 1
// (kmem_cache#28-o0)->irq_count: 0
// (kmem_cache#28-o0)->irqs_unhandled: 0
// (kmem_cache#28-o0)->name: NULL
// (kmem_cache#28-o0)->owner: null
// [pcp0...3] (kmem_cache#28-o0)->kstat_irqs: 0
// (kmem_cache#28-o0)->irq_data.node: 0
// (kmem_cache#28-o0)->irq_data.affinity.bits[0]: 0xF
// i: 0
set_bit(i, allocated_irqs);
// allocated_irqs[0]: 0x1
// i: 0, desc: kmem_cache#28-o0
irq_insert_desc(i, desc);
// radix tree에 kmem_cache#28-o0를 노드로 추가
// irq_insert_desc(0)에서 한일:
// ((&irq_desc_tree)->rnode) = (typeof(*kmem_cache#28-o0) __force rcu *)(kmem_cache#28-o0);
//
// irq_insert_desc(1)에서 한일:
// radix_tree_node_cachep를 사용한 struct radix_tree_node 용 메모리 할당: kmem_cache#20-o0
// (kmem_cache#20-o0)->height: 1
// (kmem_cache#20-o0)->count: 1
// (kmem_cache#20-o0)->parent: NULL
// (kmem_cache#20-o0)->slots[0]: kmem_cache#28-o0 (irq 0)
// (kmem_cache#20-o0)->slots[1]: kmem_cache#28-o1 (irq 1)
// radix tree의 root node: &irq_desc_tree 값을 변경
// (&irq_desc_tree)->rnode: kmem_cache#20-o0 (RADIX_LSB: 1)
// (&irq_desc_tree)->height: 1
//
// irq_insert_desc(2)에서 한일:
// (kmem_cache#20-o0)->count: 2
// (kmem_cache#20-o0)->slots[2]: kmem_cache#28-o2 (irq 2)
// i: 1 ... 15 수행
}
// arch_early_irq_init(): 0
return arch_early_irq_init();
// return 0
}