Commit | Line | Data |
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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 | ||
fc0091b3 AN |
11 | /* |
12 | * Initialize the CPU's GDT. This is either the boot CPU doing itself | |
13 | * (still using the master per-cpu area), or a CPU doing it for a | |
14 | * secondary which will soon come up. | |
15 | */ | |
e32640a2 GC |
16 | __cpuinit void init_gdt(int cpu) |
17 | { | |
fc0091b3 | 18 | struct desc_struct gdt; |
e32640a2 | 19 | |
fc0091b3 | 20 | pack_descriptor(&gdt, __per_cpu_offset[cpu], 0xFFFFF, |
e32640a2 | 21 | 0x2 | DESCTYPE_S, 0x8); |
fc0091b3 | 22 | gdt.s = 1; |
e32640a2 | 23 | |
fc0091b3 AN |
24 | write_gdt_entry(get_cpu_gdt_table(cpu), |
25 | GDT_ENTRY_PERCPU, &gdt, DESCTYPE_S); | |
e32640a2 GC |
26 | |
27 | per_cpu(this_cpu_off, cpu) = __per_cpu_offset[cpu]; | |
28 | per_cpu(cpu_number, cpu) = cpu; | |
29 | } | |
30 | #endif |