/* $NetBSD: reg.h,v 1.11 2018/01/15 10:06:49 martin 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. 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.
*
* @(#)reg.h 8.1 (Berkeley) 6/11/93
*/
#ifndef _MACHINE_REG_H_
#define _MACHINE_REG_H_
/*
* Registers passed to trap/syscall/etc.
* This structure is known to occupy exactly 80 bytes (see locore.s).
* Note, tf_global[0] is not actually written (since g0 is always 0).
* (The slot tf_global[0] is used to send a copy of %wim to kernel gdb.
* This is known as `cheating'.)
*/
struct trapframe {
int tf_psr; /* psr */
int tf_pc; /* return pc */
int tf_npc; /* return npc */
int tf_y; /* %y register */
int tf_global[8]; /* global registers in trap's caller */
int tf_out[8]; /* output registers in trap's caller */
};
/*
* Register windows. Each stack pointer (%o6 aka %sp) in each window
* must ALWAYS point to some place at which it is safe to scribble on
* 64 bytes. (If not, your process gets mangled.) Furthermore, each
* stack pointer should be aligned on an 8-byte boundary (the kernel
* as currently coded allows arbitrary alignment, but with a hefty
* performance penalty).
*/
struct rwindow {
int rw_local[8]; /* %l0..%l7 */
int rw_in[8]; /* %i0..%i7 */
};
/*
* Clone trapframe for now; this seems to be the more useful
* than the old struct reg above.
*/
struct reg {
int r_psr; /* psr */
int r_pc; /* return pc */
int r_npc; /* return npc */
int r_y; /* %y register */
int r_global[8]; /* global registers in trap's caller */
int r_out[8]; /* output registers in trap's caller */
};
#include <machine/fsr.h>
/*
* FP coprocessor registers.
*
* FP_QSIZE is the maximum coprocessor instruction queue depth
* of any implementation on which the kernel will run. David Hough:
* ``I'd suggest allowing 16 ... allowing an indeterminate variable
* size would be even better''. Of course, we cannot do that; we
* need to malloc these.
*/
#define FP_QSIZE 16
struct fp_qentry {
int *fq_addr; /* the instruction's address */
int fq_instr; /* the instruction itself */
};
struct fpreg {
u_int fr_regs[32]; /* our view is 32 32-bit registers */
int fr_fsr; /* %fsr */
};
struct fpstate {
struct fpreg fs_reg;
#define fs_regs fs_reg.fr_regs
#define fs_fsr fs_reg.fr_fsr
int fs_qsize; /* actual queue depth */
struct fp_qentry fs_queue[FP_QSIZE]; /* queue contents */
}
#ifdef _KERNEL
__aligned(8) /* asm code uses std instructions */
#endif
;
/*
* The actual FP registers are made accessible (c.f. ptrace(2)) through
* a `struct fpreg'; <arch/sparc/sparc/process_machdep.c> relies on the
* fact that `fpreg' is a prefix of `fpstate'.
*/
#endif /* _MACHINE_REG_H_ */
