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/* $NetBSD: cpu.h,v 1.17 1995/06/28 02:56:05 cgd Exp $ */
/*
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This software was developed by the Computer Systems Engineering group
* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
* contributed to Berkeley.
*
* 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, Lawrence Berkeley Laboratory.
*
* 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.
*
* @(#)cpu.h 8.4 (Berkeley) 1/5/94
*/
#ifndef _CPU_H_
#define _CPU_H_
/*
* CTL_MACHDEP definitinos.
*/
#define CPU_MAXID 1 /* no valid machdep ids */
#define CTL_MACHDEP_NAMES { \
{ 0, 0 }, \
}
#ifdef _KERNEL
/*
* Exported definitions unique to SPARC cpu support.
*/
#include <machine/psl.h>
#include <sparc/sparc/intreg.h>
/*
* definitions of cpu-dependent requirements
* referenced in generic code
*/
#define cpu_swapin(p) /* nothing */
#define cpu_swapout(p) /* nothing */
#define cpu_wait(p) /* nothing */
/*
* See syscall() for an explanation of the following. Note that the
* locore bootstrap code follows the syscall stack protocol. The
* framep argument is unused.
*/
#define cpu_set_init_frame(p, fp) \
(p)->p_md.md_tf = (struct trapframe *) \
((caddr_t)(p)->p_addr + USPACE - sizeof(struct trapframe))
/*
* Arguments to hardclock, softclock and gatherstats encapsulate the
* previous machine state in an opaque clockframe. The ipl is here
* as well for strayintr (see locore.s:interrupt and intr.c:strayintr).
* Note that CLKF_INTR is valid only if CLKF_USERMODE is false.
*/
struct clockframe {
u_int psr; /* psr before interrupt, excluding PSR_ET */
u_int pc; /* pc at interrupt */
u_int npc; /* npc at interrupt */
u_int ipl; /* actual interrupt priority level */
u_int fp; /* %fp at interrupt */
};
typedef struct clockframe clockframe;
extern int eintstack[];
#define CLKF_USERMODE(framep) (((framep)->psr & PSR_PS) == 0)
#define CLKF_BASEPRI(framep) (((framep)->psr & PSR_PIL) == 0)
#define CLKF_PC(framep) ((framep)->pc)
#define CLKF_INTR(framep) ((framep)->fp < (u_int)eintstack)
/*
* Software interrupt request `register'.
*/
union sir {
int sir_any;
char sir_which[4];
} sir;
#define SIR_NET 0
#define SIR_CLOCK 1
#define setsoftint() ienab_bis(IE_L1)
#define setsoftnet() (sir.sir_which[SIR_NET] = 1, setsoftint())
#define setsoftclock() (sir.sir_which[SIR_CLOCK] = 1, setsoftint())
int want_ast;
/*
* Preempt the current process if in interrupt from user mode,
* or after the current trap/syscall if in system mode.
*/
int want_resched; /* resched() was called */
#define need_resched() (want_resched = 1, want_ast = 1)
/*
* Give a profiling tick to the current process when the user profiling
* buffer pages are invalid. On the sparc, request an ast to send us
* through trap(), marking the proc as needing a profiling tick.
*/
#define need_proftick(p) ((p)->p_flag |= P_OWEUPC, want_ast = 1)
/*
* Notify the current process (p) that it has a signal pending,
* process as soon as possible.
*/
#define signotify(p) (want_ast = 1)
/*
* Only one process may own the FPU state.
*
* XXX this must be per-cpu (eventually)
*/
struct proc *fpproc; /* FPU owner */
int foundfpu; /* true => we have an FPU */
/*
* Interrupt handler chains. Interrupt handlers should return 0 for
* ``not me'' or 1 (``I took care of it''). intr_establish() inserts a
* handler into the list. The handler is called with its (single)
* argument, or with a pointer to a clockframe if ih_arg is NULL.
*/
struct intrhand {
int (*ih_fun) __P((void *));
void *ih_arg;
struct intrhand *ih_next;
} *intrhand[15];
void intr_establish __P((int level, struct intrhand *));
void vmeintr_establish __P((int vec, int level, struct intrhand *));
/*
* intr_fasttrap() is a lot like intr_establish, but is used for ``fast''
* interrupt vectors (vectors that are not shared and are handled in the
* trap window). Such functions must be written in assembly.
*/
void intr_fasttrap __P((int level, void (*vec)(void)));
/*
*
* The SPARC has a Trap Base Register (TBR) which holds the upper 20 bits
* of the trap vector table. The next eight bits are supplied by the
* hardware when the trap occurs, and the bottom four bits are always
* zero (so that we can shove up to 16 bytes of executable code---exactly
* four instructions---into each trap vector).
*
* The hardware allocates half the trap vectors to hardware and half to
* software.
*
* Traps have priorities assigned (lower number => higher priority).
*/
struct trapvec {
int tv_instr[4]; /* the four instructions */
};
extern struct trapvec trapbase[256]; /* the 256 vectors */
extern void wzero __P((void *, u_int));
extern void wcopy __P((const void *, void *, u_int));
#endif /* _KERNEL */
#endif /* _CPU_H_ */
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