02d0fd2ea5
to be manipulated. During initialisation the exception mask is set to allow divide by zero and overflow exceptions to be signaled.
136 lines
4.5 KiB
C
136 lines
4.5 KiB
C
/* $NetBSD: armfpe.h,v 1.7 1996/12/27 01:39:14 mark Exp $ */
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/*
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* Copyright (c) 1995 Neil A Carson.
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Brini.
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* 4. The name of the company nor the name of the author may be used to
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* endorse or promote products derived from this software without specific
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* prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* 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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* RiscBSD kernel project
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*
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* armfpe.h
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*
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* Details of functions and structures needed for ARM FP cor
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* support in RiscBSD
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*
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* Created : 04/01/96
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*/
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#include <machine/fp.h>
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#include <machine/ieeefp.h>
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#include <machine/reg.h>
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#ifdef _KERNEL
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/*
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* Type for a saved FP context, if we want to translate the context to a
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* user-readable form
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*/
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typedef struct fp_context_frame {
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u_int32_t fpsr;
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fp_extended_precision_t regs[8];
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} fp_context_frame_t;
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/* Define a structure that overlays the start of the core */
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typedef struct {
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/*
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* Addresses of procedures/functions
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*/
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u_int32_t core_abort_addr;
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u_int32_t core_initws_addr;
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u_int32_t core_initcontext_addr;
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u_int32_t core_changecontext_addr;
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u_int32_t core_shutdown_addr;
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u_int32_t core_activatecontext_addr;
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u_int32_t core_deactivatecontext_addr;
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u_int32_t core_savecontext_addr;
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u_int32_t core_loadcontext_addr;
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u_int32_t core_disable_addr;
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u_int32_t core_enable_addr;
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/*
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* Addresses of things that need to be filled in by the kernel on startup
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*/
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u_int32_t *main_ws_ptr_addr;
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u_int32_t *local_handler_ptr_addr;
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u_int32_t *old_handler_ptr_addr;
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u_int32_t *exc_handler_ptr_addr;
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u_int32_t *fp_post_proc_addr;
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/*
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* Constants that the kernel needs
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*/
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u_int32_t workspacelength;
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u_int32_t contextlength;
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/*
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* Data pointers for extra information
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*/
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u_char *core_identity_addr;
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} arm_fpe_mod_hdr_t;
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/* macro to return the FP context for a process */
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#define FP_CONTEXT(p) ((u_int)(((u_char *)(p)->p_addr) + sizeof(struct user)))
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/* Prototypes */
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int arm_fpe_boot __P((cpu_t *cpu));
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int initialise_arm_fpe __P((cpu_t *cpu));
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void arm_fpe_postproc __P((u_int fpframe, struct trapframe *frame));
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void arm_fpe_exception __P((int exception, u_int fpframe, struct trapframe *frame));
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void arm_fpe_core_disable __P((void));
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void arm_fpe_core_enable __P((void));
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u_int arm_fpe_core_initws __P((u_int workspace, int handler1, int handler2));
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u_int arm_fpe_core_abort __P((u_int context, int r12, int pc));
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void arm_fpe_core_initcontext __P((u_int context));
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u_int arm_fpe_core_changecontext __P((u_int context));
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void arm_fpe_core_shutdown __P((void));
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void arm_fpe_core_activatecontext __P((u_int context));
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u_int arm_fpe_core_deactivatecontext __P((void));
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u_int arm_fpe_core_savecontext __P((u_int context, fp_context_frame_t *savearea, int pc));
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void arm_fpe_core_loadcontext __P((u_int context, fp_context_frame_t *loadarea));
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void arm_fpe_copycontext __P((u_int c1, u_int c2));
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void arm_fpe_getcontext __P((struct proc *p, fp_reg_t *fpregs));
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void arm_fpe_setcontext __P((struct proc *p, fp_reg_t *fpregs));
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void arm_fpe_exception_glue __P((int exception));
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void arm_fpe_panic __P((void));
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void undefined_entry __P((void));
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void arm_fpe_post_proc_glue __P((void));
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void arm_fpe_set_exception_mask __P((fp_except));
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#endif /* _KERNEL */
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