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- /*
- * Copyright (c) 1988 University of Utah.
- * Copyright (c) 1982, 1990 The Regents of the University of California.
- * All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * the Systems Programming Group of the University of Utah Computer
- * Science Department.
- *
- * 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. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
- *
- * from: Utah $Hdr: cpu.h 1.16 91/03/25$
- *
- * @(#)cpu.h 7.7 (Berkeley) 6/27/91
- */
-
- /*
- * Exported definitions unique to hp300/68k cpu support.
- */
-
- /*
- * definitions of cpu-dependent requirements
- * referenced in generic code
- */
- #define COPY_SIGCODE /* copy sigcode above user stack in exec */
-
- /*
- * function vs. inline configuration;
- * these are defined to get generic functions
- * rather than inline or machine-dependent implementations
- */
- #define NEED_MINMAX /* need {,i,l,ul}{min,max} functions */
- #undef NEED_FFS /* don't need ffs function */
- #undef NEED_BCMP /* don't need bcmp function */
- #undef NEED_STRLEN /* don't need strlen function */
-
- #define cpu_exec(p) /* nothing */
- #define cpu_wait(p) /* nothing */
-
- /*
- * Arguments to hardclock, softclock and gatherstats
- * encapsulate the previous machine state in an opaque
- * clockframe; for amiga, use just what Exec
- * leaves on the stack (not documented, thus private !!!)
- */
- typedef struct intrframe {
- int exec_regs[6];
- u_short ps;
- int pc;
- } clockframe;
-
- #define CLKF_USERMODE(framep) (((framep)->ps & PSL_S) == 0)
- #define CLKF_BASEPRI(framep) (((framep)->ps & PSL_IPL7) == 0)
- #define CLKF_PC(framep) ((framep)->pc)
-
- #ifdef KERNEL
-
- /*
- * Preempt the current process if in interrupt from user mode,
- * or after the current trap/syscall if in system mode.
- */
- /* #define need_resched() { want_resched++; aston(); } */
- /* don't do anything on the Amiga, we don't use the BSD scheduler */
- #define need_resched()
-
- /*
- * Give a profiling tick to the current process from the softclock
- * interrupt. On hp300, request an ast to send us through trap(),
- * marking the proc as needing a profiling tick.
- */
- /* #define profile_tick(p, framep) { (p)->p_flag |= SOWEUPC; aston(); } */
- static void inline
- profile_tick (struct proc *p, clockframe *framep)
- {
- if (p->p_stats->p_prof.pr_scale)
- addupc (CLKF_PC(framep), &p->p_stats->p_prof, 1);
- }
-
-
- /*
- * Notify the current process (p) that it has a signal pending,
- * process as soon as possible.
- *
- * NOTE: this function assumes it is only called with p==curproc!!!
- */
- static void inline
- signotify (struct proc *p)
- {
- u_int sr, curr_disp;
- /* NOTE: the context switch is done to make sure sig_launch() is called as
- * soon as possible in the respective task. It's not nice if you can
- * return from a kill() to yourself, before the signal handler had a
- * chance to react accordingly to the signal..
- */
- asm volatile ("
- movel a5,a0
- lea pc@(Lget_sr-.+2),a5
- movel 4:w,a6
- jsr a6@(-0x1e)
- movel a1,%0
- bra Lskip
- Lget_sr:
- movew sp@,a1 | get sr register from the calling function
- rte
- Lskip:
- movel a0,a5
- " : "=g" (sr) : : "a0", "a1", "a6");
-
- if (sr & PSL_S) return; /* if in Supervisor, don't do this... */
-
- /* this quite brute-force method, but the only thing I could think of that
- * really guarantees that there was a context switch..
- * DispCount is the dispatch counter of Exec, thus we wait until there was
- * at least one such dispatch ;-)
- */
- for (curr_disp = SysBase->DispCount; curr_disp == SysBase->DispCount; ) ;
- }
-
-
- /* what is this supposed to do? i.e. how is it different than startrtclock? */
- #define enablertclock()
-
- #endif /* KERNEL */
-
- /*
- * 68851 and 68030 MMU
- */
- #define PMMU_LVLMASK 0x0007
- #define PMMU_INV 0x0400
- #define PMMU_WP 0x0800
- #define PMMU_ALV 0x1000
- #define PMMU_SO 0x2000
- #define PMMU_LV 0x4000
- #define PMMU_BE 0x8000
- #define PMMU_FAULT (PMMU_WP|PMMU_INV)
-
- /* 680X0 function codes */
- #define FC_USERD 1 /* user data space */
- #define FC_USERP 2 /* user program space */
- #define FC_PURGE 3 /* HPMMU: clear TLB entries */
- #define FC_SUPERD 5 /* supervisor data space */
- #define FC_SUPERP 6 /* supervisor program space */
- #define FC_CPU 7 /* CPU space */
-
- /* fields in the 68020 cache control register */
- #define IC_ENABLE 0x0001 /* enable instruction cache */
- #define IC_FREEZE 0x0002 /* freeze instruction cache */
- #define IC_CE 0x0004 /* clear instruction cache entry */
- #define IC_CLR 0x0008 /* clear entire instruction cache */
-
- /* additional fields in the 68030 cache control register */
- #define IC_BE 0x0010 /* instruction burst enable */
- #define DC_ENABLE 0x0100 /* data cache enable */
- #define DC_FREEZE 0x0200 /* data cache freeze */
- #define DC_CE 0x0400 /* clear data cache entry */
- #define DC_CLR 0x0800 /* clear entire data cache */
- #define DC_BE 0x1000 /* data burst enable */
- #define DC_WA 0x2000 /* write allocate */
-
- #define CACHE_ON (DC_WA|DC_BE|DC_CLR|DC_ENABLE|IC_BE|IC_CLR|IC_ENABLE)
- #define CACHE_OFF (DC_CLR|IC_CLR)
- #define CACHE_CLR (CACHE_ON)
- #define IC_CLEAR (DC_WA|DC_BE|DC_ENABLE|IC_BE|IC_CLR|IC_ENABLE)
- #define DC_CLEAR (DC_WA|DC_BE|DC_CLR|DC_ENABLE|IC_BE|IC_ENABLE)
-