sys/arch/arm/fpe-arm/armfpe.h

   1 /*      $NetBSD: armfpe.h,v 1.4 2005/12/11 12:16:46 christos Exp $      */
   2
   3 /*
   4  * Copyright (c) 1995 Neil A Carson.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. All advertising materials mentioning features or use of this software
  16  *    must display the following acknowledgement:
  17  * This product includes software developed by Brini.
  18  * 4. The name of the company nor the name of the author may be used to
  19  *    endorse or promote products derived from this software without specific
  20  *    prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  24  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  25  * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
  26  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  27  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  28  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  *
  34  * RiscBSD kernel project
  35  *
  36  * armfpe.h
  37  *
  38  * Details of functions and structures needed for ARM FP cor
  39  * support in RiscBSD
  40  *
  41  * Created      : 04/01/96
  42  */
  43
  44 #ifndef _ARMFPE_H_
  45 #define _ARMFPE_H_
  46
  47 #include <machine/fp.h>
  48 #include <machine/ieeefp.h>
  49 #include <machine/reg.h>
  50
  51 #ifdef _KERNEL
  52
  53 /*
  54  * Type for a saved FP context, if we want to translate the context to a
  55  * user-readable form
  56  */
  57
  58 typedef struct fp_context_frame {
  59         u_int32_t fpsr;
  60         fp_extended_precision_t regs[8];
  61 } fp_context_frame_t;
  62
  63 /* Define a structure that overlays the start of the core */
  64
  65 typedef struct {
  66         /*
  67          * Addresses of procedures/functions
  68          */
  69
  70         u_int32_t core_abort_addr;
  71         u_int32_t core_initws_addr;
  72         u_int32_t core_initcontext_addr;
  73         u_int32_t core_changecontext_addr;
  74         u_int32_t core_shutdown_addr;
  75         u_int32_t core_activatecontext_addr;
  76         u_int32_t core_deactivatecontext_addr;
  77         u_int32_t core_savecontext_addr;
  78         u_int32_t core_loadcontext_addr;
  79         u_int32_t core_disable_addr;
  80         u_int32_t core_enable_addr;
  81
  82         /*
  83          * Addresses of things that need to be filled in by the kernel on startup
  84          */
  85
  86         u_int32_t *main_ws_ptr_addr;
  87         u_int32_t *local_handler_ptr_addr;
  88         u_int32_t *old_handler_ptr_addr;
  89         u_int32_t *exc_handler_ptr_addr;
  90         u_int32_t *fp_post_proc_addr;
  91
  92         /*
  93          * Constants that the kernel needs
  94          */
  95
  96         u_int32_t workspacelength;
  97         u_int32_t contextlength;
  98
  99         /*
 100          * Data pointers for extra information
 101          */
 102         u_char *core_identity_addr;
 103
 104 } arm_fpe_mod_hdr_t;
 105
 106 /* macro to return the FP context for a process */
 107
 108 #define FP_CONTEXT(p) ((u_int)(((u_char *)(p)->p_addr) + sizeof(struct user)))
 109
 110 /* Prototypes */
 111
 112 int arm_fpe_boot(void);
 113 int initialise_arm_fpe(void);
 114 void arm_fpe_postproc(u_int fpframe, struct trapframe *frame);
 115 void arm_fpe_exception(int exception, u_int fpframe, struct trapframe *frame);
 116
 117 void arm_fpe_core_disable(void);
 118 void arm_fpe_core_enable(void);
 119 u_int arm_fpe_core_initws(u_int workspace, int handler1, int handler2);
 120 u_int arm_fpe_core_abort(u_int context, int r12, int pc);
 121 void arm_fpe_core_initcontext(u_int context);
 122 u_int arm_fpe_core_changecontext(u_int context);
 123 void arm_fpe_core_shutdown(void);
 124 void arm_fpe_core_activatecontext(u_int context);
 125 u_int arm_fpe_core_deactivatecontext(void);
 126 u_int arm_fpe_core_savecontext(u_int context, fp_context_frame_t *savearea, int pc);
 127 void arm_fpe_core_loadcontext(u_int context, const fp_context_frame_t *loadarea);
 128 void arm_fpe_copycontext(u_int c1, u_int c2);
 129 void arm_fpe_getcontext(struct proc *p, struct fpreg *fpregs);
 130 void arm_fpe_setcontext(struct proc *p, const struct fpreg *fpregs);
 131
 132 void arm_fpe_exception_glue(int exception);
 133 void arm_fpe_panic(void);
 134 void undefined_entry(void);
 135 void arm_fpe_post_proc_glue(void);
 136 void arm_fpe_set_exception_mask(fp_except);
 137
 138 #endif  /* _KERNEL */
 139 #endif /* _ARMFPE_H_ */