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Viewing changes to roms/SLOF/include/ppcp7/cpu.h

  • Committer: Phil Dennis-Jordan
  • Date: 2017-07-21 08:03:43 UTC
  • mfrom: (1.1.1)
  • Revision ID: phil@philjordan.eu-20170721080343-2yr2vdj7713czahv
New upstream release 2.9.0.

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roms/SLOF/include/ppcp7/cpu.h
 
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/******************************************************************************
 
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 * Copyright (c) 2004, 2008 IBM Corporation
 
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 * All rights reserved.
 
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 * This program and the accompanying materials
 
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 * are made available under the terms of the BSD License
 
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 * which accompanies this distribution, and is available at
 
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 * http://www.opensource.org/licenses/bsd-license.php
 
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 *
 
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 * Contributors:
 
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 *     IBM Corporation - initial implementation
 
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 *****************************************************************************/
 
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#ifndef __CPU_H
 
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#define __CPU_H
 
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/* Used in boot_abort.S, will need something better for KVM */
 
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#define HSPRG0  304
 
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/* XXX FIXME: Can be more efficient, no dcbst nor loop needed on P7 */
 
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/* This macro uses r0 */
 
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#define FLUSH_CACHE(r, n)       add     n, n, r; \
 
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                                addi    n, n, 127; \
 
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                                rlwinm  r, r, 0,0,24; \
 
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                                rlwinm  n, n, 0,0,24; \
 
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                                sub     n, n, r; \
 
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                                srwi    n, n, 7; \
 
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                                mtctr   n; \
 
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                        0:      dcbst   0, r; \
 
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                                sync; \
 
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                                icbi    0, r; \
 
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                                sync; \
 
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                                isync; \
 
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                                addi    r, r, 128; \
 
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                                bdnz    0b;
 
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#ifndef __ASSEMBLER__
 
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#define STRINGIFY(x...) #x
 
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#define EXPAND(x) STRINGIFY(x)
 
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static inline void flush_cache(void* r, long n)
 
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{
 
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        asm volatile(EXPAND(FLUSH_CACHE(%0, %1))
 
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                     : "+r"(r), "+r"(n)
 
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                     :: "memory", "cc", "r0", "ctr");
 
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}
 
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static inline void eieio(void)
 
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{
 
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        asm volatile ("eieio":::"memory");
 
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}
 
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static inline void barrier(void)
 
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{
 
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        asm volatile("" : : : "memory");
 
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}
 
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#define cpu_relax() barrier()
 
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static inline void sync(void)
 
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{
 
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        asm volatile ("sync" ::: "memory");
 
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}
 
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#define mb() sync()
 
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#endif /* __ASSEMBLER__ */
 
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#endif