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Annotation of Gnu-Mach/i386/util/NOTES, revision 1.1.1.1

1.1       root        1: 
                      2: raw_switch:
                      3: 
                      4:        Provides the code to switch between real and protected mode.
                      5:        Switches between the environments "completely":
                      6:        e.g. when switching to protected mode,
                      7:        all the normal protected-mode state for that environment is set up.
                      8: 
                      9: raw_pmode:
                     10: 
                     11:        i16_raw_enter_pmode()
                     12:                Enters protoected mode from real mode.
                     13:                Does not initialize IDT or TSS or anything else;
                     14:                just gets the system into protected mode
                     15:                with a simple temporary GDT.
                     16:                Returns with interrupts turned off
                     17:                (and they'd better stay off until there's a valid pmode IDT!)
                     18: 
                     19:        i16_raw_leave_pmode()
                     20:                Assumes paging is turned off.
                     21:                Returns with interrupts turned off;
                     22:                they can probably be turned back on at any time.
                     23: 
                     24:        Depends on:
                     25:                i16_die()
                     26:                A20 enable/disable code (e.g. raw_a20).
                     27:                gdt.h: KERNEL_16_CS, KERNEL_16_DS
                     28: 
                     29: 
                     30: 
                     31: vm_param.h:
                     32: 
                     33:        Must export kvtolin(), lintokv()
                     34: 
                     35: 

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