diff options
Diffstat (limited to 'include/asm-x86/desc.h')
| -rw-r--r-- | include/asm-x86/desc.h | 46 |
1 files changed, 32 insertions, 14 deletions
diff --git a/include/asm-x86/desc.h b/include/asm-x86/desc.h index 28bddbcb38be..a44c4dc70590 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) @@ -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. */ |