John Stefanelli
dad4ff6a34
[Stage1] Add IRQ remapping [Stage1] Handle IRQ0 gracefully [Stage1] Add error output functions
50 lines
No EOL
1.2 KiB
NASM
50 lines
No EOL
1.2 KiB
NASM
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section .text
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; void outb(os_u16 port, os_u8 data);
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global outb
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outb:
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MOV EDX, [ESP + 4] ; load parameter 'port'
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MOV EAX, [ESP + 8] ; load parameter 'data'
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OUT DX, AL ; output byte in AL to port in DX
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RET ; return
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; void outw(os_u16 port, os_u16 data)
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global outw
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outw:
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MOV EDX, [ESP + 4] ; load parameter 'port'
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MOV EAX, [ESP + 8] ; load parameter 'data'
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OUT DX, AX ; output word in AX to port in DX
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RET ; return
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; void outd(os_u16 port, os_u32 data)
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global outd
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outd:
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MOV EDX, [ESP + 4] ; load parameter 'port'
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MOV EAX, [ESP + 8] ; load parameter 'data'
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OUT DX, EAX ; output double word in EAX to port in DX
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RET ; return
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; os_u8 inb(os_u16 port)
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global inb
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inb:
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MOV EDX, [ESP + 4] ; load parameter 'port'
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XOR EAX, EAX ; reset EAX
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IN AL, DX ; read byte from port 'DX'
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RET ; return
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; os_u16 inw(os_u16 port)
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global inw
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inw:
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MOV EDX, [ESP + 4] ; load parameter 'port'
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XOR EAX, EAX ; reset EAX
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IN AX, DX ; read word from port 'DX'
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RET ; return
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; os_u32 ind(os_u16 port)
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global ind
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ind:
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MOV EDX, [ESP + 4] ; load parameter 'port'
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XOR EAX, EAX ; reset EAX
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IN EAX, DX ; read double word from port 'DX'
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RET ; return |