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Diffstat (limited to 'arch/x86/include/asm/desc.h')
-rw-r--r--arch/x86/include/asm/desc.h27
1 files changed, 27 insertions, 0 deletions
diff --git a/arch/x86/include/asm/desc.h b/arch/x86/include/asm/desc.h
index 1ced11d31932..476082a83d1c 100644
--- a/arch/x86/include/asm/desc.h
+++ b/arch/x86/include/asm/desc.h
@@ -383,6 +383,33 @@ static inline void set_desc_limit(struct desc_struct *desc, unsigned long limit)
void alloc_intr_gate(unsigned int n, const void *addr);
+static inline void init_idt_data(struct idt_data *data, unsigned int n,
+ const void *addr)
+{
+ BUG_ON(n > 0xFF);
+
+ memset(data, 0, sizeof(*data));
+ data->vector = n;
+ data->addr = addr;
+ data->segment = __KERNEL_CS;
+ data->bits.type = GATE_INTERRUPT;
+ data->bits.p = 1;
+}
+
+static inline void idt_init_desc(gate_desc *gate, const struct idt_data *d)
+{
+ unsigned long addr = (unsigned long) d->addr;
+
+ gate->offset_low = (u16) addr;
+ gate->segment = (u16) d->segment;
+ gate->bits = d->bits;
+ gate->offset_middle = (u16) (addr >> 16);
+#ifdef CONFIG_X86_64
+ gate->offset_high = (u32) (addr >> 32);
+ gate->reserved = 0;
+#endif
+}
+
extern unsigned long system_vectors[];
extern void load_current_idt(void);