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Diffstat (limited to 'sys/powerpc/include/frame.h')
| -rw-r--r-- | sys/powerpc/include/frame.h | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/sys/powerpc/include/frame.h b/sys/powerpc/include/frame.h new file mode 100644 index 000000000000..0841477d5fee --- /dev/null +++ b/sys/powerpc/include/frame.h @@ -0,0 +1,114 @@ +/*- + * SPDX-License-Identifier: BSD-4-Clause + * + * Copyright (C) 1995, 1996 Wolfgang Solfrank. + * Copyright (C) 1995, 1996 TooLs GmbH. + * All rights reserved. + * + * 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 TooLs GmbH. + * 4. The name of TooLs GmbH may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``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 TOOLS GMBH 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. + * + * $NetBSD: frame.h,v 1.2 1999/01/10 10:13:15 tsubai Exp $ + */ + +#ifndef _MACHINE_FRAME_H_ +#define _MACHINE_FRAME_H_ + +#include <sys/types.h> + +/* + * We have to save all registers on every trap, because + * 1. user could attach this process every time + * 2. we must be able to restore all user registers in case of fork + * Actually, we do not save the fp registers on trap, since + * these are not used by the kernel. They are saved only when switching + * between processes using the FPU. + * + * Change ordering to cluster together these register_t's. XXX + */ +struct trapframe { + register_t fixreg[32]; + register_t lr; + register_t cr; + register_t xer; + register_t ctr; + register_t srr0; + register_t srr1; + register_t exc; + register_t dar; /* DAR/DEAR filled in on DSI traps */ + union { + struct { + /* dsisr only filled on a DSI trap */ + register_t dsisr; + } aim; + struct { + register_t esr; + register_t dbcr0; + } booke; + } cpu; +}; + +/* + * FRAMELEN is the size of the stack region used by the low-level trap + * handler. It is the size of its data (trapframe) plus the callframe + * header (sizeof(struct callframe) - 3 register widths). It must also + * be 16-byte aligned. + */ +#define FRAMELEN roundup(sizeof(struct trapframe) + \ + sizeof(struct callframe) - 3*sizeof(register_t), 16) +#define trapframe(td) ((td)->td_frame) + +/* + * Call frame for PowerPC used during fork. + */ +#ifdef __powerpc64__ +struct callframe { + register_t cf_dummy_fp; /* dummy frame pointer */ + register_t cf_cr; + register_t cf_lr; + register_t cf_compiler; + register_t cf_linkeditor; + register_t cf_toc; + register_t cf_func; + register_t cf_arg0; + register_t cf_arg1; + register_t _padding; /* Maintain 16-byte alignment */ +}; +#else +struct callframe { + register_t cf_dummy_fp; /* dummy frame pointer */ + register_t cf_lr; /* space for link register save */ + register_t cf_func; + register_t cf_arg0; + register_t cf_arg1; + register_t _padding; /* Maintain 16-byte alignment */ +}; +#endif + +/* Definitions for syscalls */ +#define FIRSTARG 3 /* first arg in reg 3 */ +#define NARGREG 8 /* 8 args in regs */ + +#endif /* _MACHINE_FRAME_H_ */ |