[Patch v2 13/18] x86, irq: Move IRQ initialization routines from io_apic.c into vector.c

Jiang Liu
2014-09-26T13:29:50Z

Move IRQ initialization routines from io_apic.c into vector.c,
preparing for enabling hierarchy irqdomain.

Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
---
arch/x86/include/asm/io_apic.h | 2 ++
arch/x86/kernel/apic/io_apic.c | 22 +---------------------
arch/x86/kernel/apic/vector.c | 28 ++++++++++++++++++++++++++++
3 files changed, 31 insertions(+), 21 deletions(-)

diff --git a/arch/x86/include/asm/io_apic.h b/arch/x86/include/asm/io_apic.h
index 533803dc3733..7bf86bfe05b1 100644
--- a/arch/x86/include/asm/io_apic.h
+++ b/arch/x86/include/asm/io_apic.h
@@ -145,6 +145,7 @@ extern unsigned long io_apic_irqs;

struct irq_cfg;
extern void ioapic_insert_resources(void);
+extern int arch_early_ioapic_init(void);

extern int native_setup_ioapic_entry(int, struct IO_APIC_route_entry *,
unsigned int, int,
@@ -249,6 +250,7 @@ extern void print_IO_APICs(void);
#define io_apic_assign_pci_irqs 0
#define setup_ioapic_ids_from_mpc x86_init_noop
static inline void ioapic_insert_resources(void) { }
+static inline int arch_early_ioapic_init(void) { return 0; }
static inline void print_IO_APICs(void) {}
#define gsi_top (NR_IRQS_LEGACY)
static inline int mp_find_ioapic(u32 gsi) { return 0; }
diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index 3fc4f540ef0f..b80dd6402647 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -245,7 +245,7 @@ static void free_ioapic_saved_registers(int idx)
ioapics[idx].saved_registers = NULL;
}

-int __init arch_early_irq_init(void)
+int __init arch_early_ioapic_init(void)
{
struct irq_cfg *cfg;
int i, node = cpu_to_node(0);
@@ -2486,26 +2486,6 @@ unsigned int arch_dynirq_lower_bound(unsigned int from)
return ioapic_initialized ? ioapic_dynirq_base : gsi_top;
}

-int __init arch_probe_nr_irqs(void)
-{
- int nr;
-
- if (nr_irqs > (NR_VECTORS * nr_cpu_ids))
- nr_irqs = NR_VECTORS * nr_cpu_ids;
-
- nr = (gsi_top + nr_legacy_irqs()) + 8 * nr_cpu_ids;
-#if defined(CONFIG_PCI_MSI) || defined(CONFIG_HT_IRQ)
- /*
- * for MSI and HT dyn irq
- */
- nr += gsi_top * 16;
-#endif
- if (nr < nr_irqs)
- nr_irqs = nr;
-
- return 0;
-}
-
#ifdef CONFIG_X86_32
static int io_apic_get_unique_id(int ioapic, int apic_id)
{
diff --git a/arch/x86/kernel/apic/vector.c b/arch/x86/kernel/apic/vector.c
index f728cbfc29a9..2df1bff738b1 100644
--- a/arch/x86/kernel/apic/vector.c
+++ b/arch/x86/kernel/apic/vector.c
@@ -235,6 +235,34 @@ void clear_irq_vector(int irq, struct irq_cfg *cfg)
raw_spin_unlock_irqrestore(&vector_lock, flags);
}

+int __init arch_probe_nr_irqs(void)
+{
+ int nr;
+
+ if (nr_irqs > (NR_VECTORS * nr_cpu_ids))
+ nr_irqs = NR_VECTORS * nr_cpu_ids;
+
+ nr = (gsi_top + nr_legacy_irqs()) + 8 * nr_cpu_ids;
+#if defined(CONFIG_PCI_MSI) || defined(CONFIG_HT_IRQ)
+ /*
+ * for MSI and HT dyn irq
+ */
+ if (gsi_top <= NR_IRQS_LEGACY)
+ nr += 8 * nr_cpu_ids;
+ else
+ nr += gsi_top * 16;
+#endif
+ if (nr < nr_irqs)
+ nr_irqs = nr;
+
+ return 0;
+}
+
+int __init arch_early_irq_init(void)
+{
+ return arch_early_ioapic_init();
+}
+
static void __setup_vector_irq(int cpu)
{
/* Initialize vector_irq on a new cpu */
--
1.7.10.4