Subversion Repositories HelenOS

Rev

Rev 125 | Rev 143 | Go to most recent revision | Show entire file | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed

Rev 125 Rev 141
Line 126... Line 126...
126 
    trap_register( 7, nm_fault);
 126 
    trap_register( 7, nm_fault);
127 
    trap_register(12, ss_fault);
 127 
    trap_register(12, ss_fault);
128 
}
 128 
}
129 
 
 129 
 
130 
 
 130 
 
- 
 
 131 
 
- 
 
 132 
static void clean_IOPL_NT_flags(void)
- 
 
 133 
{
- 
 
 134 
  asm
- 
 
 135 
    (
- 
 
 136 
    "pushfl;"
- 
 
 137 
        "pop %%eax;"
- 
 
 138 
        "and $0xffff8fff,%%eax;"
- 
 
 139 
        "push %%eax;"
- 
 
 140 
        "popfl;"
- 
 
 141 
        :
- 
 
 142 
        :
- 
 
 143 
        :"%eax"
- 
 
 144 
    );
- 
 
 145 
}
- 
 
 146 
 
- 
 
 147 
 
- 
 
 148 
 
- 
 
 149 
 
131 
void pm_init(void)
 150 
void pm_init(void)
132 
{
 151 
{
133 
    struct descriptor *gdt_p = (struct descriptor *) PA2KA(gdtr.base);
 152 
    struct descriptor *gdt_p = (struct descriptor *) PA2KA(gdtr.base);
134 
 
 153 
 
135 
    /*
 154 
    /*
Line 163... Line 182...
163 
    /*
 182 
    /*
164 
     * As of this moment, the current CPU has its own GDT pointing
 183 
     * As of this moment, the current CPU has its own GDT pointing
165 
     * to its own TSS. We just need to load the TR register.
 184 
     * to its own TSS. We just need to load the TR register.
166 
     */
 185 
     */
167 
    __asm__("ltr %0" : : "r" ((__u16) selector(TSS_DES)));
 186 
    __asm__("ltr %0" : : "r" ((__u16) selector(TSS_DES)));
- 
 
 187 
   
- 
 
 188 
    clean_IOPL_NT_flags();
168 
}
 189 
}