1 /* $NetBSD: psl.h,v 1.14 2006/08/05 21:26:49 sanjayl Exp $ */ 2 3 /* 4 * Copyright (C) 1995, 1996 Wolfgang Solfrank. 5 * Copyright (C) 1995, 1996 TooLs GmbH. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by TooLs GmbH. 19 * 4. The name of TooLs GmbH may not be used to endorse or promote products 20 * derived from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``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 TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 27 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 28 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 30 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 31 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 #ifndef _POWERPC_PSL_H_ 34 #define _POWERPC_PSL_H_ 35 36 /* 37 * Machine State Register (MSR) 38 * 39 * The PowerPC 601 does not implement the following bits: 40 * 41 * VEC, POW, ILE, BE, RI, LE[*] 42 * 43 * [*] Little-endian mode on the 601 is implemented in the HID0 register. 44 */ 45 #define PSL_VEC 0x02000000 /* AltiVec vector unit available */ 46 #define PSL_POW 0x00040000 /* power management */ 47 #define PSL_TGPR 0x00020000 /* temp. gpr remapping (mpc603e) */ 48 #define PSL_ILE 0x00010000 /* interrupt endian mode (1 == le) */ 49 #define PSL_EE 0x00008000 /* external interrupt enable */ 50 #define PSL_PR 0x00004000 /* privilege mode (1 == user) */ 51 #define PSL_FP 0x00002000 /* floating point enable */ 52 #define PSL_ME 0x00001000 /* machine check enable */ 53 #define PSL_FE0 0x00000800 /* floating point interrupt mode 0 */ 54 #define PSL_SE 0x00000400 /* single-step trace enable */ 55 #define PSL_BE 0x00000200 /* branch trace enable */ 56 #define PSL_FE1 0x00000100 /* floating point interrupt mode 1 */ 57 #define PSL_IP 0x00000040 /* interrupt prefix */ 58 #define PSL_IR 0x00000020 /* instruction address relocation */ 59 #define PSL_DR 0x00000010 /* data address relocation */ 60 #define PSL_PM 0x00000008 /* Performance monitor marked mode */ 61 #define PSL_RI 0x00000002 /* recoverable interrupt */ 62 #define PSL_LE 0x00000001 /* endian mode (1 == le) */ 63 64 #define PSL_601_MASK ~(PSL_VEC|PSL_POW|PSL_ILE|PSL_BE|PSL_RI|PSL_LE) 65 66 /* The IBM 970 series does not implemnt LE mode */ 67 #define PSL_970_MASK ~(PSL_ILE|PSL_LE) 68 69 /* 70 * Floating-point exception modes: 71 */ 72 #define PSL_FE_DIS 0 /* none */ 73 #define PSL_FE_NONREC PSL_FE1 /* imprecise non-recoverable */ 74 #define PSL_FE_REC PSL_FE0 /* imprecise recoverable */ 75 #define PSL_FE_PREC (PSL_FE0 | PSL_FE1) /* precise */ 76 #define PSL_FE_DFLT PSL_FE_DIS /* default == none */ 77 78 /* 79 * Note that PSL_POW and PSL_ILE are not in the saved copy of the MSR 80 */ 81 #define PSL_MBO 0 82 #define PSL_MBZ 0 83 84 /* 85 * A user is not allowed to change any MSR bits except the following: 86 * We restrict the test to the low 16 bits of the MSR since those are the 87 * only ones preserved in the trap. Note that this means PSL_VEC needs to 88 * be restored to SRR1 in userret. 89 */ 90 #if defined(_KERNEL) && !defined(_LOCORE) 91 #ifdef _KERNEL_OPT 92 #include "opt_ppcarch.h" 93 #endif /* _KERNEL_OPT */ 94 95 #if defined(PPC_OEA) || defined (PPC_OEA64_BRIDGE) 96 extern int cpu_psluserset, cpu_pslusermod; 97 98 #define PSL_USERSET cpu_psluserset 99 #define PSL_USERMOD cpu_pslusermod 100 #else /* PPC_IBM4XX */ 101 #define PSL_USERSET (PSL_EE | PSL_PR | PSL_ME | PSL_IR | PSL_DR) 102 #define PSL_USERMOD (0) 103 #endif /* PPC_OEA */ 104 105 #define PSL_USERSRR1 ((PSL_USERSET|PSL_USERMOD) & 0xFFFF) 106 #define PSL_USEROK_P(psl) (((psl) & ~PSL_USERMOD) == PSL_USERSET) 107 #endif /* !_LOCORE */ 108 109 #endif /* _POWERPC_PSL_H_ */ 110