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@ -6,8 +6,29 @@ |
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%include "pm/gdt.asm" ; GDT defined here |
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; Switching to PM |
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[bits 16] |
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switch_to_pm: |
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cli ; Switch interupts |
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lgdt [gdt_descriptor] ; Tell the CPU about the GDT |
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mov eax, cr0 ; Set first bit of the CR0 register |
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or eax, 0x1 ; to 1 |
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mov cr0, eax ; Update the control register |
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[bits 32] |
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; Init registers & stack when in PM |
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init_pm: |
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mov ax, GDT_DATA_SEG ; Point the segment registers to GDT_DATA_SEG |
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; Segment registers |
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mov ds, ax |
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mov ss, ax |
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mov es, ax |
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mov fs, ax |
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mov gs, ax |
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mov ebp, 0x900000 ; Update the stack pointer |
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mov esp, ebp |
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call BEGIN_PM |
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