coreboot-kgpe-d16/payloads/libpayload/include/arm/arch/io.h
Vadim Bendebury bc8b4fad1e libpayload: Introduce bit manipulation macros
Some drivers being ported to depthcharge use io bit manipulation
macros. The libpayload include file seems the most appropriate place
to keep these macros in. There is no common io.h file across
architectures, the x86 version could be added later if required.

BUG=chrome-os-partner:27784
TEST=observed ipq806x SPI driver deptcharge port (WIP) compile properly.

Original-Change-Id: I33f3be072faefce293c871f7e3bc3b2e6bc38ffe
Original-Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/202559
Original-Reviewed-by: Stefan Reinauer <reinauer@chromium.org>
Original-Reviewed-by: Trevor Bourget <tbourget@codeaurora.org>
(cherry picked from commit ad18a605b4d0ec3251c1614e7358b42aa6b5c45a)
Signed-off-by: Marc Jones <marc.jones@se-eng.com>

Change-Id: I8656e12af20ce4cf11d771942e8fe7d4eb2a560d
Reviewed-on: http://review.coreboot.org/8062
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
2015-01-06 16:56:32 +01:00

89 lines
2.6 KiB
C

/*
* 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
#include <stdint.h>
#include <arch/cache.h>
static inline uint8_t readb(volatile void *_a)
{
dmb();
return *(volatile uint8_t *)_a;
}
static inline uint16_t readw(volatile void *_a)
{
dmb();
return *(volatile uint16_t *)_a;
}
static inline uint32_t readl(volatile void *_a)
{
dmb();
return *(volatile uint32_t *)_a;
}
static inline void writeb(uint8_t _v, volatile void *_a)
{
dmb();
*(volatile uint8_t *)_a = _v;
dmb();
}
static inline void writew(uint16_t _v, volatile void *_a)
{
dmb();
*(volatile uint16_t *)_a = _v;
dmb();
}
static inline void writel(uint32_t _v, volatile void *_a)
{
dmb();
*(volatile uint32_t *)_a = _v;
dmb();
}
/*
* Handy bit manipulation macros, BE version will have to be added when/if
* needed.
*/
#ifdef CONFIG_LP_LITTLE_ENDIAN
#define clrsetbits_le32(addr, clear, set) writel((readl(addr) & ~(clear)) |\
(set), (addr))
#define setbits_le32(addr, set) writel(readl(addr) | (set), (addr))
#define clrbits_le32(addr, clear) writel(readl(addr) & ~(clear), (addr))
#endif
#endif