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/* Copyright 2014 Freescale Semiconductor, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Freescale Semiconductor nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
*
* ALTERNATIVELY, this software may be distributed under the terms of the
* GNU General Public License ("GPL") as published by the Free Software
* Foundation, either version 2 of that License or (at your option) any
* later version.
*
* THIS SOFTWARE IS PROVIDED BY Freescale Semiconductor ``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 Freescale Semiconductor 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 DPA_SYS_PPC32_H
#define DPA_SYS_PPC32_H
/* Implementation of PowerPC 32 bit specific routines */
/* TODO: NB, we currently assume that hwsync() and lwsync() imply compiler
* barriers and that dcb*() won't fall victim to compiler or execution
* reordering with respect to other code/instructions that manipulate the same
* cacheline. */
#define hwsync() __asm__ __volatile__ ("sync" : : : "memory")
#define lwsync() __asm__ __volatile__ (stringify_in_c(LWSYNC) : : : "memory")
#define dcbf(p) __asm__ __volatile__ ("dcbf 0,%0" : : "r" (p) : "memory")
#define dcbt_ro(p) __asm__ __volatile__ ("dcbt 0,%0" : : "r" (p))
#define dcbt_rw(p) __asm__ __volatile__ ("dcbtst 0,%0" : : "r" (p))
#define dcbi(p) dcbf(p)
#define dcbzl(p) __asm__ __volatile__ ("dcbzl 0,%0" : : "r" (p))
#define dcbz_64(p) dcbzl(p)
#define dcbf_64(p) dcbf(p)
/* Commonly used combo */
#define dcbit_ro(p) \
do { \
dcbi(p); \
dcbt_ro(p); \
} while (0)
static inline u64 mfatb(void)
{
u32 hi, lo, chk;
do {
hi = mfspr(SPRN_ATBU);
lo = mfspr(SPRN_ATBL);
chk = mfspr(SPRN_ATBU);
} while (unlikely(hi != chk));
return ((u64)hi << 32) | (u64)lo;
}
#endif
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