49 lines
847 B
ArmAsm
49 lines
847 B
ArmAsm
; Raw CPU port I/O kernel module
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; Author: xamidev
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; Licensed under the Unlicense. See the repo below.
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; https://github.com/xamidev/blankos
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global outb
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outb:
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mov al, [esp + 8]
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mov dx, [esp + 4]
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out dx, al
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ret
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global inb
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inb:
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mov dx, [esp + 4]
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in al, dx
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ret
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global x86_div64_32
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x86_div64_32:
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push ebp
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mov ebp, esp
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; Arguments:
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; [ebp + 8] - lower 32 bits of dividend (uint32_t)
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; [ebp + 12] - upper 32 bits of dividend (uint32_t)
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; [ebp + 16] - divisor (uint32_t)
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; [ebp + 20] - pointer to quotient (uint64_t*)
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; [ebp + 24] - pointer to remainder (uint32_t*)
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mov eax, [ebp + 8]
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mov edx, [ebp + 12]
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mov ecx, [ebp + 16]
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div ecx
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mov esi, [ebp + 20]
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mov [esi], eax
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mov dword [esi + 4], 0
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mov esi, [ebp + 24]
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mov [esi], edx
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pop ebp
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ret |