sys/compat/linux/arch/powerpc/linux_machdep.h

   1 /*      $NetBSD: linux_machdep.h,v 1.9 2008/04/28 20:23:43 martin Exp $ */
   2
   3 /*-
   4  * Copyright (c) 1995, 2000, 2001 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Frank van der Linden and Emmanuel Dreyfus.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #ifndef _POWERPC_LINUX_MACHDEP_H
  33 #define _POWERPC_LINUX_MACHDEP_H
  34
  35 #include <compat/linux/common/linux_types.h>
  36 #include <compat/linux/common/linux_signal.h>
  37 #include <compat/linux/common/linux_siginfo.h>
  38
  39 /*
  40  * From Linux's include/asm-ppc/ptrace.h
  41  * Needed for sigcontext
  42  */
  43 struct linux_pt_regs {
  44 #define lpt_regs_fixreg_begin lgpr[0]
  45         unsigned long lgpr[32];
  46 #define lpt_regs_fixreg_end lgpr[31]
  47         unsigned long lnip;
  48         unsigned long lmsr;
  49         unsigned long lorig_gpr3;       /* Used for restarting system calls */
  50         unsigned long lctr;
  51         unsigned long llink;
  52         unsigned long lxer;
  53         unsigned long lccr;
  54         unsigned long lmq;              /* 601 only (not used at present) */
  55         /* Used on APUS to hold IPL value. */
  56         unsigned long ltrap;            /* Reason for being here */
  57         unsigned long ldar;             /* Fault registers */
  58         unsigned long ldsisr;
  59         unsigned long lresult;  /* Result of a system call */
  60 };
  61
  62 /*
  63  * From Linux's include/asm-ppc/sigcontext.h
  64  * Linux/ppc calls that struct sigcontect_struct
  65  */
  66 struct linux_sigcontext {
  67         unsigned long _unused[4];
  68         int lsignal;
  69         unsigned long lhandler;
  70         unsigned long lmask;
  71         struct linux_pt_regs    *lregs;
  72 };
  73
  74 /*
  75  * From Linux's include/asm-ppc/elf.h
  76  */
  77 #define LINUX_ELF_NGREG 48                      /* includes nip, msr, lr, etc. */
  78 #define LINUX_ELF_NFPREG 33             /* includes fpscr */
  79 typedef unsigned long linux_elf_greg_t;
  80 typedef linux_elf_greg_t linux_elf_gregset_t[LINUX_ELF_NGREG];
  81
  82 /*
  83  * From Linux's include/asm-ppc/ptrace.h
  84  */
  85 #define LINUX__SIGNAL_FRAMESIZE 64
  86
  87 /*
  88  * We make the stack look like Linux expects it when calling a signal
  89  * handler, but use the BSD way of calling the handler and sigreturn().
  90  * This means that we need to pass the pointer to the handler too.
  91  * It is appended to the frame to not interfere with the rest of it.
  92  *
  93  * The following is from Linux's arch/ppc/kern/signal.c:
  94  *
  95  * > When we have signals to deliver, we set up on the
  96  * > user stack, going down from the original stack pointer:
  97  * > a sigregs struct
  98  * > one or more sigcontext structs with
  99  * > a gap of LINUX__SIGNAL_FRAMESIZE bytes
 100  * >
 101  * > Each of these things must be a multiple of 16 bytes in size.
 102  *
 103  * linux_sigregs is a linux_sigframe on other Linux ports. Linux/PowerPC
 104  * defines a rt_sigframe struct, but it is only used for RT signals. for
 105  * non RT signals, struct sigregs is used instead.
 106  *
 107  * About the ltramp filed: that trampoline code is not used. Instead, the
 108  * sigcode (7 bytes long) trampoline code, copied by exec() on program startup
 109  * is used. However, Linux binaries might expect it to be here.
 110  */
 111 struct linux_sigregs {
 112         linux_elf_gregset_t lgp_regs;
 113         double lfp_regs[LINUX_ELF_NFPREG];
 114         unsigned long ltramp[2];
 115         /*
 116          * Programs using the rs6000/xcoff abi can save up to 19 gp regs
 117          * and 18 fp regs below sp before decrementing it.
 118          */
 119         int labigap[56];
 120 };
 121
 122 /*
 123  * The following is not from Linux, we define it for convenience. It is the
 124  * size of the abigap field of linux_sigregs.
 125  */
 126 #define LINUX_ABIGAP    (56*sizeof(int))
 127
 128 /*
 129  * linux sigframe in a nutshell (however we don't use it):
 130  *
 131  * struct linux_sigframe {
 132  *              char _gap[LINUX__SIGNAL_FRAMESIZE];
 133  *              struct sigcontext lsc;
 134  *              struct linux_sigregs    lsg;
 135  * };
 136  */
 137
 138 /*
 139  * From Linux's include/asm-ppc/ucontext.h
 140  */
 141 struct linux_ucontext {
 142         unsigned long luc_flags;
 143         struct linux_ucontext *luc_link;
 144         linux_stack_t   luc_stack;
 145         struct linux_sigcontext luc_context;
 146         linux_sigset_t  luc_sigmask;  /* mask last for extensibility */
 147 };
 148
 149 /*
 150  * From Linux's arch/ppc/kernel/signal.c, the real rt_sigframe
 151  */
 152 struct linux_rt_sigframe
 153 {
 154         unsigned long  _unused[2];
 155         struct linux_siginfo *lpinfo;
 156         void *lpuc;
 157         struct linux_siginfo linfo;
 158         struct linux_ucontext luc;
 159 };
 160
 161 /*
 162  * Major device numbers of VT device on both Linux and NetBSD. Used in
 163  * ugly patch to fake device numbers.
 164  *
 165  * LINUX_CONS_MAJOR is from Linux's include/linux/major.h
 166  */
 167 #define LINUX_CONS_MAJOR 4
 168
 169 /*
 170  * Linux ioctl calls for the keyboard.
 171  *
 172  * From Linux's include/linux/kd.h
 173  */
 174 #define LINUX_KDGKBMODE 0x4b44
 175 #define LINUX_KDSKBMODE 0x4b45
 176 #define LINUX_KDMKTONE  0x4b30
 177 #define LINUX_KDSETMODE 0x4b3a
 178 #define LINUX_KDENABIO  0x4b36
 179 #define LINUX_KDDISABIO 0x4b37
 180 #define LINUX_KDGETLED  0x4b31
 181 #define LINUX_KDSETLED  0x4b32
 182 #define LINUX_KDGKBTYPE 0x4B33
 183 #define LINUX_KDGKBENT  0x4B46
 184
 185 /*
 186  * Mode for KDSKBMODE which we don't have (we just use plain mode for this)
 187  *
 188  * From Linux's include/linux/kd.h
 189  */
 190 #define LINUX_K_MEDIUMRAW 2
 191
 192 /*
 193  * VT ioctl calls in Linux (the ones that the pcvt emulation in
 194  * wscons can handle)
 195  *
 196  * From Linux's include/linux/vt.h
 197  */
 198 #define LINUX_VT_OPENQRY        0x5600
 199 #define LINUX_VT_GETMODE        0x5601
 200 #define LINUX_VT_SETMODE        0x5602
 201 #define LINUX_VT_GETSTATE       0x5603
 202 #define LINUX_VT_RELDISP        0x5605
 203 #define LINUX_VT_ACTIVATE       0x5606
 204 #define LINUX_VT_WAITACTIVE     0x5607
 205 #define LINUX_VT_DISALLOCATE    0x5608
 206
 207 /*
 208  * This range used by VMWare (XXX)
 209  *
 210  * From Linux's include/linux/vt.h
 211  * XXX It's not sure this s needed for powerpc
 212  */
 213 #define LINUX_VMWARE_NONE 200
 214 #define LINUX_VMWARE_LAST 237
 215
 216 /*
 217  * Range of ioctls to just pass on, so that modules (like VMWare) can
 218  * handle them.
 219  *
 220  * From Linux's include/linux/vt.h
 221  */
 222 #define LINUX_IOCTL_MIN_PASS LINUX_VMWARE_NONE
 223 #define LINUX_IOCTL_MAX_PASS (LINUX_VMWARE_LAST+8)
 224
 225 #ifdef _KERNEL
 226 __BEGIN_DECLS /* XXX from NetBSD/i386. Not arch dependent? */
 227 void linux_syscall_intern(struct proc *);
 228 __END_DECLS
 229 #endif /* !_KERNEL */
 230
 231
 232 #endif /* _POWERPC_LINUX_MACHDEP_H */