4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync I/O Library. This file has compiler specifics for GCC as there is no
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync ANSI C standard for doing IO.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync GCC - uses EFIAPI assembler. __asm__ calls GAS. __volatile__ makes sure the
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync compiler puts the assembler in this exact location. The complex GNUC
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync operations are not optimzed. It would be possible to also write these
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync with EFIAPI assembler.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync We don't advocate putting compiler specifics in libraries or drivers but there
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync is no other way to make this work.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync This program and the accompanying materials
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync are licensed and made available under the terms and conditions of the BSD License
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync which accompanies this distribution. The full text of the license may be found at
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Reads an 8-bit I/O port.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Reads the 8-bit I/O port specified by Port. The 8-bit read value is returned.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync This function must guarantee that all I/O read and write operations are
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync serialized.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync If 8-bit I/O port operations are not supported, then ASSERT().
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param Port The I/O port to read.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @return The value read.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync __asm__ __volatile__ ("inb %w1,%b0" : "=a" (Data) : "d" ((UINT16)Port));
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Writes an 8-bit I/O port.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Writes the 8-bit I/O port specified by Port with the value specified by Value
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync and returns Value. This function must guarantee that all I/O read and write
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync operations are serialized.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync If 8-bit I/O port operations are not supported, then ASSERT().
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param Port The I/O port to write.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param Value The value to write to the I/O port.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @return The value written the I/O port.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync __asm__ __volatile__ ("outb %b0,%w1" : : "a" (Value), "d" ((UINT16)Port));
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Reads a 16-bit I/O port.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Reads the 16-bit I/O port specified by Port. The 16-bit read value is returned.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync This function must guarantee that all I/O read and write operations are
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync serialized.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync If 16-bit I/O port operations are not supported, then ASSERT().
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync If Port is not aligned on a 16-bit boundary, then ASSERT().
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param Port The I/O port to read.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @return The value read.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync __asm__ __volatile__ ("inw %w1,%w0" : "=a" (Data) : "d" ((UINT16)Port));
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Writes a 16-bit I/O port.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Writes the 16-bit I/O port specified by Port with the value specified by Value
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync and returns Value. This function must guarantee that all I/O read and write
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync operations are serialized.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync If 16-bit I/O port operations are not supported, then ASSERT().
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync If Port is not aligned on a 16-bit boundary, then ASSERT().
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param Port The I/O port to write.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param Value The value to write to the I/O port.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @return The value written the I/O port.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync __asm__ __volatile__ ("outw %w0,%w1" : : "a" (Value), "d" ((UINT16)Port));
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Reads a 32-bit I/O port.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Reads the 32-bit I/O port specified by Port. The 32-bit read value is returned.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync This function must guarantee that all I/O read and write operations are
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync serialized.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync If 32-bit I/O port operations are not supported, then ASSERT().
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync If Port is not aligned on a 32-bit boundary, then ASSERT().
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param Port The I/O port to read.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @return The value read.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync __asm__ __volatile__ ("inl %w1,%0" : "=a" (Data) : "d" ((UINT16)Port));
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Writes a 32-bit I/O port.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Writes the 32-bit I/O port specified by Port with the value specified by Value
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync and returns Value. This function must guarantee that all I/O read and write
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync operations are serialized.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync If 32-bit I/O port operations are not supported, then ASSERT().
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync If Port is not aligned on a 32-bit boundary, then ASSERT().
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param Port The I/O port to write.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param Value The value to write to the I/O port.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @return The value written the I/O port.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync __asm__ __volatile__ ("outl %0,%w1" : : "a" (Value), "d" ((UINT16)Port));