diff options
Diffstat (limited to 'src/arch/x86_64/asm/io_port.s')
| -rw-r--r-- | src/arch/x86_64/asm/io_port.s | 71 |
1 files changed, 0 insertions, 71 deletions
diff --git a/src/arch/x86_64/asm/io_port.s b/src/arch/x86_64/asm/io_port.s deleted file mode 100644 index 3aec69d..0000000 --- a/src/arch/x86_64/asm/io_port.s +++ /dev/null @@ -1,71 +0,0 @@ -;*************************************************************************** -;* Operating-System Construction * -;*---------------------------------------------------------------------------* -;* * -;* I O _ P O R T * -;* * -;*---------------------------------------------------------------------------* -;* The functions defined here encapsulate the machine instructions 'in' and * -;* 'out' for class IO_Port. * -;***************************************************************************** - -; EXPORTED FUNCTIONS - -[GLOBAL _outb] -[GLOBAL _outw] -[GLOBAL _inb] -[GLOBAL _inw] - -; FUNCTION IMPLEMENTATIONS - -[SECTION .text] - -; OUTB: Byte-wise output via an I/O port. -; -; C prototype: void outb (int port, int value); - -_outb: - push rbp - mov rbp, rsp - mov rdx, rdi - mov rax, rsi - out dx, al - pop rbp - ret - -; OUTW: Word-wise output via an I/O port. -; -; C prototype: void outw (int port, int value); - -_outw: - push rbp - mov rbp, rsp - mov rdx, rdi - mov rax, rsi - out dx, ax - pop rbp - ret - -; INB: Byte-wise input via an I/O port. -; -; C prototype: unsigned char inb (int port); - -_inb: - push rbp - mov rbp, rsp - mov rdx, rdi - in al, dx - pop rbp - ret - -; INW: Word-wise input via an I/O port. -; -; C prototype: unsigned short inw (int port); - -_inw: - push rbp - mov rbp, rsp - mov rdx, rdi - in ax, dx - pop rbp - ret |