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Line 126... Line 126...
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    trap_register( 7, nm_fault);
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    trap_register( 7, nm_fault);
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    trap_register(12, ss_fault);
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    trap_register(12, ss_fault);
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}
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}
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static void clean_IOPL_NT_flags(void)
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{
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  asm
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    (
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    "pushfl;"
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        "pop %%eax;"
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        "and $0xffff8fff,%%eax;"
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        "push %%eax;"
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        "popfl;"
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        :
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        :
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        :"%eax"
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    );
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}
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void pm_init(void)
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void pm_init(void)
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{
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{
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    struct descriptor *gdt_p = (struct descriptor *) PA2KA(gdtr.base);
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    struct descriptor *gdt_p = (struct descriptor *) PA2KA(gdtr.base);
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    /*
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    /*
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    /*
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    /*
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     * As of this moment, the current CPU has its own GDT pointing
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     * As of this moment, the current CPU has its own GDT pointing
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     * to its own TSS. We just need to load the TR register.
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     * to its own TSS. We just need to load the TR register.
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     */
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     */
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    __asm__("ltr %0" : : "r" ((__u16) selector(TSS_DES)));
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    __asm__("ltr %0" : : "r" ((__u16) selector(TSS_DES)));
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    clean_IOPL_NT_flags();
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}
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}