1 /* $NetBSD: linux_machdep.h,v 1.3 2001/05/27 21:11:12 manu 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 * From Linux's include/asm-ppc/ptrace.h 45 * Needed for sigcontext 46 */ 47 struct linux_pt_regs { 48 #define lpt_regs_fixreg_begin lgpr[0] 49 unsigned long lgpr[32]; 50 #define lpt_regs_fixreg_end lgpr[31] 51 unsigned long lnip; 52 unsigned long lmsr; 53 unsigned long lorig_gpr3; /* Used for restarting system calls */ 54 unsigned long lctr; 55 unsigned long llink; 56 unsigned long lxer; 57 unsigned long lccr; 58 unsigned long lmq; /* 601 only (not used at present) */ 59 /* Used on APUS to hold IPL value. */ 60 unsigned long ltrap; /* Reason for being here */ 61 unsigned long ldar; /* Fault registers */ 62 unsigned long ldsisr; 63 unsigned long lresult; /* Result of a system call */ 64 }; 65 66 /* 67 * From Linux's include/asm-ppc/sigcontext.h 68 * Linux/ppc calls that struct sigcontect_struct 69 */ 70 struct linux_sigcontext { 71 unsigned long _unused[4]; 72 int lsignal; 73 unsigned long lhandler; 74 unsigned long lmask; 75 struct linux_pt_regs *lregs; 76 }; 77 78 /* 79 * From Linux's include/asm-ppc/elf.h 80 */ 81 #define LINUX_ELF_NGREG 48 /* includes nip, msr, lr, etc. */ 82 #define LINUX_ELF_NFPREG 33 /* includes fpscr */ 83 typedef unsigned long linux_elf_greg_t; 84 typedef linux_elf_greg_t linux_elf_gregset_t[LINUX_ELF_NGREG]; 85 86 /* 87 * From Linux's include/asm-ppc/ptrace.h 88 */ 89 #define LINUX__SIGNAL_FRAMESIZE 64 90 91 /* 92 * We make the stack look like Linux expects it when calling a signal 93 * handler, but use the BSD way of calling the handler and sigreturn(). 94 * This means that we need to pass the pointer to the handler too. 95 * It is appended to the frame to not interfere with the rest of it. 96 * 97 * The following is from Linux's arch/ppc/kern/signal.c: 98 * 99 * > When we have signals to deliver, we set up on the 100 * > user stack, going down from the original stack pointer: 101 * > a sigregs struct 102 * > one or more sigcontext structs with 103 * > a gap of LINUX__SIGNAL_FRAMESIZE bytes 104 * > 105 * > Each of these things must be a multiple of 16 bytes in size. 106 * 107 * linux_sigregs is a linux_sigframe on other Linux ports. Linux/PowerPC 108 * defines a rt_sigframe struct, but it is only used for RT signals. for 109 * non RT signals, struct sigregs is used instead. 110 * 111 * About the ltramp filed: that trampoline code is not used. Instead, the 112 * sigcode (7 bytes long) trampoline code, copied by exec() on program startup 113 * is used. However, Linux binaries might expect it to be here. 114 */ 115 struct linux_sigregs { 116 linux_elf_gregset_t lgp_regs; 117 double lfp_regs[LINUX_ELF_NFPREG]; 118 unsigned long ltramp[2]; 119 /* 120 * Programs using the rs6000/xcoff abi can save up to 19 gp regs 121 * and 18 fp regs below sp before decrementing it. 122 */ 123 int labigap[56]; 124 }; 125 126 /* 127 * The following is not from Linux, we define it for convenience. It is the 128 * size of the abigap field of linux_sigregs. 129 */ 130 #define LINUX_ABIGAP (56*sizeof(int)) 131 132 /* 133 * linux sigframe in a nutshell (however we don't use it): 134 * 135 * struct linux_sigframe { 136 * char _gap[LINUX__SIGNAL_FRAMESIZE]; 137 * struct sigcontext lsc; 138 * struct linux_sigregs lsg; 139 * }; 140 */ 141 142 /* 143 * From Linux's include/asm-ppc/ucontext.h 144 */ 145 struct linux_ucontext { 146 unsigned long luc_flags; 147 struct linux_ucontext *luc_link; 148 linux_stack_t luc_stack; 149 struct linux_sigcontext luc_context; 150 linux_sigset_t luc_sigmask; /* mask last for extensibility */ 151 }; 152 153 /* 154 * From Linux's arch/ppc/kernel/signal.c, the real rt_sigframe 155 */ 156 struct linux_rt_sigframe 157 { 158 unsigned long _unused[2]; 159 struct linux_siginfo *lpinfo; 160 void *lpuc; 161 struct linux_siginfo linfo; 162 struct linux_ucontext luc; 163 }; 164 165 #ifdef _KERNEL 166 __BEGIN_DECLS 167 void linux_sendsig __P((sig_t, int, sigset_t *, u_long)); 168 dev_t linux_fakedev __P((dev_t)); 169 __END_DECLS 170 #endif /* _KERNEL */ 171 172 /* 173 * Major device numbers of VT device on both Linux and NetBSD. Used in 174 * ugly patch to fake device numbers. 175 * 176 * LINUX_CONS_MAJOR is from Linux's include/linux/major.h 177 */ 178 #define LINUX_CONS_MAJOR 4 179 #define NETBSD_WSCONS_MAJOR 47 180 181 /* 182 * Linux ioctl calls for the keyboard. 183 * 184 * From Linux's include/linux/kd.h 185 */ 186 #define LINUX_KDGKBMODE 0x4b44 187 #define LINUX_KDSKBMODE 0x4b45 188 #define LINUX_KDMKTONE 0x4b30 189 #define LINUX_KDSETMODE 0x4b3a 190 #define LINUX_KDENABIO 0x4b36 191 #define LINUX_KDDISABIO 0x4b37 192 #define LINUX_KDGETLED 0x4b31 193 #define LINUX_KDSETLED 0x4b32 194 #define LINUX_KDGKBTYPE 0x4B33 195 #define LINUX_KDGKBENT 0x4B46 196 197 /* 198 * Mode for KDSKBMODE which we don't have (we just use plain mode for this) 199 * 200 * From Linux's include/linux/kd.h 201 */ 202 #define LINUX_K_MEDIUMRAW 2 203 204 /* 205 * VT ioctl calls in Linux (the ones that the pcvt emulation in 206 * wscons can handle) 207 * 208 * From Linux's include/linux/vt.h 209 */ 210 #define LINUX_VT_OPENQRY 0x5600 211 #define LINUX_VT_GETMODE 0x5601 212 #define LINUX_VT_SETMODE 0x5602 213 #define LINUX_VT_GETSTATE 0x5603 214 #define LINUX_VT_RELDISP 0x5605 215 #define LINUX_VT_ACTIVATE 0x5606 216 #define LINUX_VT_WAITACTIVE 0x5607 217 #define LINUX_VT_DISALLOCATE 0x5608 218 219 /* 220 * This range used by VMWare (XXX) 221 * 222 * From Linux's include/linux/vt.h 223 * XXX It's not sure this s needed for powerpc 224 */ 225 #define LINUX_VMWARE_NONE 200 226 #define LINUX_VMWARE_LAST 237 227 228 /* 229 * Range of ioctls to just pass on, so that LKMs (like VMWare) can 230 * handle them. 231 * 232 * From Linux's include/linux/vt.h 233 */ 234 #define LINUX_IOCTL_MIN_PASS LINUX_VMWARE_NONE 235 #define LINUX_IOCTL_MAX_PASS (LINUX_VMWARE_LAST+8) 236 237 #ifdef _KERNEL 238 __BEGIN_DECLS /* XXX from NetBSD/i386. Not arch dependent? */ 239 void linux_syscall_intern __P((struct proc *)); 240 __END_DECLS 241 #endif /* !_KERNEL */ 242 243 #endif /* _POWERPC_LINUX_MACHDEP_H */ 244