1 /* $NetBSD: linux_machdep.h,v 1.4 2002/02/15 16:48:02 christos 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #ifndef _POWERPC_LINUX_MACHDEP_H 40 #define _POWERPC_LINUX_MACHDEP_H 41 42 #include <compat/linux/common/linux_signal.h> 43 44 /* 45 * From Linux's include/asm-ppc/ptrace.h 46 * Needed for sigcontext 47 */ 48 struct linux_pt_regs { 49 #define lpt_regs_fixreg_begin lgpr[0] 50 unsigned long lgpr[32]; 51 #define lpt_regs_fixreg_end lgpr[31] 52 unsigned long lnip; 53 unsigned long lmsr; 54 unsigned long lorig_gpr3; /* Used for restarting system calls */ 55 unsigned long lctr; 56 unsigned long llink; 57 unsigned long lxer; 58 unsigned long lccr; 59 unsigned long lmq; /* 601 only (not used at present) */ 60 /* Used on APUS to hold IPL value. */ 61 unsigned long ltrap; /* Reason for being here */ 62 unsigned long ldar; /* Fault registers */ 63 unsigned long ldsisr; 64 unsigned long lresult; /* Result of a system call */ 65 }; 66 67 /* 68 * From Linux's include/asm-ppc/sigcontext.h 69 * Linux/ppc calls that struct sigcontect_struct 70 */ 71 struct linux_sigcontext { 72 unsigned long _unused[4]; 73 int lsignal; 74 unsigned long lhandler; 75 unsigned long lmask; 76 struct linux_pt_regs *lregs; 77 }; 78 79 /* 80 * From Linux's include/asm-ppc/elf.h 81 */ 82 #define LINUX_ELF_NGREG 48 /* includes nip, msr, lr, etc. */ 83 #define LINUX_ELF_NFPREG 33 /* includes fpscr */ 84 typedef unsigned long linux_elf_greg_t; 85 typedef linux_elf_greg_t linux_elf_gregset_t[LINUX_ELF_NGREG]; 86 87 /* 88 * From Linux's include/asm-ppc/ptrace.h 89 */ 90 #define LINUX__SIGNAL_FRAMESIZE 64 91 92 /* 93 * We make the stack look like Linux expects it when calling a signal 94 * handler, but use the BSD way of calling the handler and sigreturn(). 95 * This means that we need to pass the pointer to the handler too. 96 * It is appended to the frame to not interfere with the rest of it. 97 * 98 * The following is from Linux's arch/ppc/kern/signal.c: 99 * 100 * > When we have signals to deliver, we set up on the 101 * > user stack, going down from the original stack pointer: 102 * > a sigregs struct 103 * > one or more sigcontext structs with 104 * > a gap of LINUX__SIGNAL_FRAMESIZE bytes 105 * > 106 * > Each of these things must be a multiple of 16 bytes in size. 107 * 108 * linux_sigregs is a linux_sigframe on other Linux ports. Linux/PowerPC 109 * defines a rt_sigframe struct, but it is only used for RT signals. for 110 * non RT signals, struct sigregs is used instead. 111 * 112 * About the ltramp filed: that trampoline code is not used. Instead, the 113 * sigcode (7 bytes long) trampoline code, copied by exec() on program startup 114 * is used. However, Linux binaries might expect it to be here. 115 */ 116 struct linux_sigregs { 117 linux_elf_gregset_t lgp_regs; 118 double lfp_regs[LINUX_ELF_NFPREG]; 119 unsigned long ltramp[2]; 120 /* 121 * Programs using the rs6000/xcoff abi can save up to 19 gp regs 122 * and 18 fp regs below sp before decrementing it. 123 */ 124 int labigap[56]; 125 }; 126 127 /* 128 * The following is not from Linux, we define it for convenience. It is the 129 * size of the abigap field of linux_sigregs. 130 */ 131 #define LINUX_ABIGAP (56*sizeof(int)) 132 133 /* 134 * linux sigframe in a nutshell (however we don't use it): 135 * 136 * struct linux_sigframe { 137 * char _gap[LINUX__SIGNAL_FRAMESIZE]; 138 * struct sigcontext lsc; 139 * struct linux_sigregs lsg; 140 * }; 141 */ 142 143 /* 144 * From Linux's include/asm-ppc/ucontext.h 145 */ 146 struct linux_ucontext { 147 unsigned long luc_flags; 148 struct linux_ucontext *luc_link; 149 linux_stack_t luc_stack; 150 struct linux_sigcontext luc_context; 151 linux_sigset_t luc_sigmask; /* mask last for extensibility */ 152 }; 153 154 /* 155 * From Linux's arch/ppc/kernel/signal.c, the real rt_sigframe 156 */ 157 struct linux_rt_sigframe 158 { 159 unsigned long _unused[2]; 160 struct linux_siginfo *lpinfo; 161 void *lpuc; 162 struct linux_siginfo linfo; 163 struct linux_ucontext luc; 164 }; 165 166 /* 167 * Major device numbers of VT device on both Linux and NetBSD. Used in 168 * ugly patch to fake device numbers. 169 * 170 * LINUX_CONS_MAJOR is from Linux's include/linux/major.h 171 */ 172 #define LINUX_CONS_MAJOR 4 173 #define NETBSD_WSCONS_MAJOR 47 174 175 /* 176 * Linux ioctl calls for the keyboard. 177 * 178 * From Linux's include/linux/kd.h 179 */ 180 #define LINUX_KDGKBMODE 0x4b44 181 #define LINUX_KDSKBMODE 0x4b45 182 #define LINUX_KDMKTONE 0x4b30 183 #define LINUX_KDSETMODE 0x4b3a 184 #define LINUX_KDENABIO 0x4b36 185 #define LINUX_KDDISABIO 0x4b37 186 #define LINUX_KDGETLED 0x4b31 187 #define LINUX_KDSETLED 0x4b32 188 #define LINUX_KDGKBTYPE 0x4B33 189 #define LINUX_KDGKBENT 0x4B46 190 191 /* 192 * Mode for KDSKBMODE which we don't have (we just use plain mode for this) 193 * 194 * From Linux's include/linux/kd.h 195 */ 196 #define LINUX_K_MEDIUMRAW 2 197 198 /* 199 * VT ioctl calls in Linux (the ones that the pcvt emulation in 200 * wscons can handle) 201 * 202 * From Linux's include/linux/vt.h 203 */ 204 #define LINUX_VT_OPENQRY 0x5600 205 #define LINUX_VT_GETMODE 0x5601 206 #define LINUX_VT_SETMODE 0x5602 207 #define LINUX_VT_GETSTATE 0x5603 208 #define LINUX_VT_RELDISP 0x5605 209 #define LINUX_VT_ACTIVATE 0x5606 210 #define LINUX_VT_WAITACTIVE 0x5607 211 #define LINUX_VT_DISALLOCATE 0x5608 212 213 /* 214 * This range used by VMWare (XXX) 215 * 216 * From Linux's include/linux/vt.h 217 * XXX It's not sure this s needed for powerpc 218 */ 219 #define LINUX_VMWARE_NONE 200 220 #define LINUX_VMWARE_LAST 237 221 222 /* 223 * Range of ioctls to just pass on, so that LKMs (like VMWare) can 224 * handle them. 225 * 226 * From Linux's include/linux/vt.h 227 */ 228 #define LINUX_IOCTL_MIN_PASS LINUX_VMWARE_NONE 229 #define LINUX_IOCTL_MAX_PASS (LINUX_VMWARE_LAST+8) 230 231 #ifdef _KERNEL 232 __BEGIN_DECLS /* XXX from NetBSD/i386. Not arch dependent? */ 233 void linux_syscall_intern __P((struct proc *)); 234 __END_DECLS 235 #endif /* !_KERNEL */ 236 237 238 #endif /* _POWERPC_LINUX_MACHDEP_H */ 239