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Diffstat (limited to 'include/asm-x86/desc.h')
-rw-r--r--include/asm-x86/desc.h50
1 files changed, 34 insertions, 16 deletions
diff --git a/include/asm-x86/desc.h b/include/asm-x86/desc.h
index 268a012bcd7..a44c4dc7059 100644
--- a/include/asm-x86/desc.h
+++ b/include/asm-x86/desc.h
@@ -29,11 +29,17 @@ static inline void fill_ldt(struct desc_struct *desc,
extern struct desc_ptr idt_descr;
extern gate_desc idt_table[];
+struct gdt_page {
+ struct desc_struct gdt[GDT_ENTRIES];
+} __attribute__((aligned(PAGE_SIZE)));
+DECLARE_PER_CPU(struct gdt_page, gdt_page);
+
+static inline struct desc_struct *get_cpu_gdt_table(unsigned int cpu)
+{
+ return per_cpu(gdt_page, cpu).gdt;
+}
+
#ifdef CONFIG_X86_64
-extern struct desc_struct cpu_gdt_table[GDT_ENTRIES];
-extern struct desc_ptr cpu_gdt_descr[];
-/* the cpu gdt accessor */
-#define get_cpu_gdt_table(x) ((struct desc_struct *)cpu_gdt_descr[x].address)
static inline void pack_gate(gate_desc *gate, unsigned type, unsigned long func,
unsigned dpl, unsigned ist, unsigned seg)
@@ -51,16 +57,6 @@ static inline void pack_gate(gate_desc *gate, unsigned type, unsigned long func,
}
#else
-struct gdt_page {
- struct desc_struct gdt[GDT_ENTRIES];
-} __attribute__((aligned(PAGE_SIZE)));
-DECLARE_PER_CPU(struct gdt_page, gdt_page);
-
-static inline struct desc_struct *get_cpu_gdt_table(unsigned int cpu)
-{
- return per_cpu(gdt_page, cpu).gdt;
-}
-
static inline void pack_gate(gate_desc *gate, unsigned char type,
unsigned long base, unsigned dpl, unsigned flags,
unsigned short seg)
@@ -192,8 +188,8 @@ static inline void native_set_ldt(const void *addr, unsigned int entries)
unsigned cpu = smp_processor_id();
ldt_desc ldt;
- set_tssldt_descriptor(&ldt, (unsigned long)addr,
- DESC_LDT, entries * sizeof(ldt) - 1);
+ set_tssldt_descriptor(&ldt, (unsigned long)addr, DESC_LDT,
+ entries * LDT_ENTRY_SIZE - 1);
write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_LDT,
&ldt, DESC_LDT);
asm volatile("lldt %w0"::"q" (GDT_ENTRY_LDT*8));
@@ -311,6 +307,28 @@ static inline void set_intr_gate(unsigned int n, void *addr)
_set_gate(n, GATE_INTERRUPT, addr, 0, 0, __KERNEL_CS);
}
+#define SYS_VECTOR_FREE 0
+#define SYS_VECTOR_ALLOCED 1
+
+extern int first_system_vector;
+extern char system_vectors[];
+
+static inline void alloc_system_vector(int vector)
+{
+ if (system_vectors[vector] == SYS_VECTOR_FREE) {
+ system_vectors[vector] = SYS_VECTOR_ALLOCED;
+ if (first_system_vector > vector)
+ first_system_vector = vector;
+ } else
+ BUG();
+}
+
+static inline void alloc_intr_gate(unsigned int n, void *addr)
+{
+ alloc_system_vector(n);
+ set_intr_gate(n, addr);
+}
+
/*
* This routine sets up an interrupt gate at directory privilege level 3.
*/