coreboot-kgpe-d16/payloads/libpayload/include/x86/arch/io.h

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/*
* This file is part of the libpayload project.
*
* Copyright (C) 2008 Advanced Micro Devices, Inc.
* Copyright (C) 2008 coresystems GmbH
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef _ARCH_IO_H
#define _ARCH_IO_H
libpayload: Expand setbits_le32() and fix readl() const-ness setbits_le32() is not really arch-specific... the arch-specific part of accessing memory is wrapped by readl() and writel(), and the endianness can be accounted for with the right macros. Generalize the definitions, add a be32 version and move them to endian.h so that all platforms can use them. Also include endian.h from libpayload.h so we won't update any payload's old use of the macros (endianness is something useful enough to always have avalable anyway, and shouldn't clash with other things). This also fixes a bug where these macros would only be available if libpayload-config.h had been independently included before. Also fix a bug with readl() macros on all archs where they refused to work on const pointers (which they should). CQ-DEPEND=CL:208712 BUG=None TEST=Stuff still compiles. Built and booted on Storm. Original-Change-Id: I01a7fbadbb5d740675657d95c1e969027562ba8c Original-Signed-off-by: Julius Werner <jwerner@chromium.org> Original-Reviewed-on: https://chromium-review.googlesource.com/208713 Original-Reviewed-by: Vadim Bendebury <vbendeb@chromium.org> Original-Reviewed-by: David Hendricks <dhendrix@chromium.org> (cherry picked from commit 951f8a6d77bc21bd793bf4f228a0965ade586f00) Signed-off-by: Marc Jones <marc.jones@se-eng.com> Change-Id: I51c25f01b200b91abbe32c879905349bb05dc9c8 Reviewed-on: http://review.coreboot.org/8129 Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org> Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Tested-by: build bot (Jenkins)
2014-07-17 19:43:15 +02:00
#define readb(_a) (*(volatile const unsigned char *) (_a))
#define readw(_a) (*(volatile const unsigned short *) (_a))
#define readl(_a) (*(volatile const unsigned long *) (_a))
#define writeb(_v, _a) (*(volatile unsigned char *) (_a) = (_v))
#define writew(_v, _a) (*(volatile unsigned short *) (_a) = (_v))
#define writel(_v, _a) (*(volatile unsigned long *) (_a) = (_v))
static inline unsigned long inl(int port)
{
unsigned long val;
__asm__ __volatile__("inl %w1, %0" : "=a"(val) : "Nd"(port));
return val;
}
static inline unsigned short inw(int port)
{
unsigned short val;
__asm__ __volatile__("inw %w1, %w0" : "=a"(val) : "Nd"(port));
return val;
}
static inline unsigned char inb(int port)
{
unsigned char val;
__asm__ __volatile__("inb %w1, %b0" : "=a"(val) : "Nd"(port));
return val;
}
static inline void outl(unsigned long val, int port)
{
__asm__ __volatile__("outl %0, %w1" : : "a"(val), "Nd"(port));
}
static inline void outw(unsigned short val, int port)
{
__asm__ __volatile__("outw %w0, %w1" : : "a"(val), "Nd"(port));
}
static inline void outb(unsigned char val, int port)
{
__asm__ __volatile__("outb %b0, %w1" : : "a"(val), "Nd"(port));
}
static inline void outsl(int port, const void *addr, unsigned long count)
{
__asm__ __volatile__("rep; outsl" : "+S"(addr), "+c"(count) : "d"(port));
}
static inline void outsw(int port, const void *addr, unsigned long count)
{
__asm__ __volatile__("rep; outsw" : "+S"(addr), "+c"(count) : "d"(port));
}
static inline void outsb(int port, const void *addr, unsigned long count)
{
__asm__ __volatile__("rep; outsb" : "+S"(addr), "+c"(count) : "d"(port));
}
static inline void insl(int port, void *addr, unsigned long count)
{
__asm__ __volatile__("rep; insl" : "+D"(addr), "+c"(count) : "d"(port)
: "memory");
}
static inline void insw(int port, void *addr, unsigned long count)
{
__asm__ __volatile__("rep; insw" : "+D"(addr), "+c"(count) : "d"(port)
: "memory");
}
static inline void insb(int port, void *addr, unsigned long count)
{
__asm__ __volatile__("rep; insb" : "+D"(addr), "+c"(count) : "d"(port)
: "memory");
}
#endif