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d27f1d4c12
us our first minimal glimpse of PowerPC support. With this code we can get to the "mountroot>" prompt on my Apple iMac. We can't get any further due to lack of clock and interrupt handling, among other things. This does however mean that pmap and VM are initialising. We're fairly dependant on OpenFirmware at this point, but I hope to add support for other classes of firmware at a later stage. Reviewed by: obrien, dfr
128 lines
2.5 KiB
C
128 lines
2.5 KiB
C
/*-
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* Copyright (c) 1998 Doug Rabson
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _MACHINE_CPUFUNC_H_
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#define _MACHINE_CPUFUNC_H_
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#ifdef _KERNEL
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#include <sys/types.h>
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#ifdef __GNUC__
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static __inline void
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breakpoint(void)
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{
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return;
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}
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#endif
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/*
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* Bogus interrupt manipulation
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*/
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static __inline void
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disable_intr(void)
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{
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u_int32_t msr;
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msr = 0;
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__asm __volatile(
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"mfmsr %0\n\t"
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"rlwinm %0, %0, 0, 17, 15\n\t"
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"mtmsr %0"
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: "+r" (msr));
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return;
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}
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static __inline void
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enable_intr(void)
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{
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u_int32_t msr;
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msr = 0;
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__asm __volatile(
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"mfmsr %0\n\t"
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"ori %0, %0, 0x8000\n\t"
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"mtmsr %0"
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: "+r" (msr));
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return;
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}
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static __inline u_int
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save_intr(void)
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{
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u_int msr;
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__asm __volatile("mfmsr %0" : "=r" (msr));
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return msr;
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}
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static __inline critical_t
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critical_enter(void)
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{
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return ((critical_t)save_intr());
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}
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static __inline void
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restore_intr(u_int msr)
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{
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__asm __volatile("mtmsr %0" : : "r" (msr));
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return;
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}
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static __inline void
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critical_exit(critical_t msr)
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{
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return (restore_intr((u_int)msr));
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}
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static __inline void
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powerpc_mb(void)
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{
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__asm __volatile("eieio;" : : : "memory");
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}
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static __inline void
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*powerpc_get_globalp(void)
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{
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void *ret;
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__asm __volatile("mfsprg %0, 0" : "=r" (ret));
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return(ret);
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}
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#endif /* _KERNEL */
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#endif /* !_MACHINE_CPUFUNC_H_ */
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