[deliverable/linux.git] / arch / x86 / kernel / smpcommon.c

/*
 * SMP stuff which is common to all sub-architectures.
 */
#include <linux/module.h>
#include <asm/smp.h>

#ifdef CONFIG_X86_32
DEFINE_PER_CPU(unsigned long, this_cpu_off);
EXPORT_PER_CPU_SYMBOL(this_cpu_off);

/* Initialize the CPU's GDT.  This is either the boot CPU doing itself
   (still using the master per-cpu area), or a CPU doing it for a
   secondary which will soon come up. */
__cpuinit void init_gdt(int cpu)
{
	struct desc_struct *gdt = get_cpu_gdt_table(cpu);

	pack_descriptor(&gdt[GDT_ENTRY_PERCPU],
			__per_cpu_offset[cpu], 0xFFFFF,
			0x2 | DESCTYPE_S, 0x8);

	gdt[GDT_ENTRY_PERCPU].s = 1;

	per_cpu(this_cpu_off, cpu) = __per_cpu_offset[cpu];
	per_cpu(cpu_number, cpu) = cpu;
}
#endif
Commit	Line	Data
e32640a2 GC	1	/*
	2	* SMP stuff which is common to all sub-architectures.
	3	*/
	4	#include <linux/module.h>
	5	#include <asm/smp.h>
	6
	7	#ifdef CONFIG_X86_32
	8	DEFINE_PER_CPU(unsigned long, this_cpu_off);
	9	EXPORT_PER_CPU_SYMBOL(this_cpu_off);
	10
	11	/* Initialize the CPU's GDT. This is either the boot CPU doing itself
	12	(still using the master per-cpu area), or a CPU doing it for a
	13	secondary which will soon come up. */
	14	__cpuinit void init_gdt(int cpu)
	15	{
	16	struct desc_struct *gdt = get_cpu_gdt_table(cpu);
	17
	18	pack_descriptor(&gdt[GDT_ENTRY_PERCPU],
	19	__per_cpu_offset[cpu], 0xFFFFF,
	20	0x2 \| DESCTYPE_S, 0x8);
	21
	22	gdt[GDT_ENTRY_PERCPU].s = 1;
	23
	24	per_cpu(this_cpu_off, cpu) = __per_cpu_offset[cpu];
	25	per_cpu(cpu_number, cpu) = cpu;
	26	}
	27	#endif