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Annotation of kernel/mach/ppc/thread_status.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
        !             3:  *
        !             4:  * @APPLE_LICENSE_HEADER_START@
        !             5:  * 
        !             6:  * Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
        !             7:  * Reserved.  This file contains Original Code and/or Modifications of
        !             8:  * Original Code as defined in and that are subject to the Apple Public
        !             9:  * Source License Version 1.1 (the "License").  You may not use this file
        !            10:  * except in compliance with the License.  Please obtain a copy of the
        !            11:  * License at http://www.apple.com/publicsource and read it before using
        !            12:  * this file.
        !            13:  * 
        !            14:  * The Original Code and all software distributed under the License are
        !            15:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
        !            16:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
        !            17:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
        !            18:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
        !            19:  * License for the specific language governing rights and limitations
        !            20:  * under the License.
        !            21:  * 
        !            22:  * @APPLE_LICENSE_HEADER_END@
        !            23:  */
        !            24: 
        !            25: #ifndef        _MACH_PPC_THREAD_STATUS_H_
        !            26: #define _MACH_PPC_THREAD_STATUS_H_
        !            27: 
        !            28: /*
        !            29:  * ppc_thread_state is the structure that is exported to user threads for 
        !            30:  * use in status/mutate calls.  This structure should never change.
        !            31:  *
        !            32:  */
        !            33: 
        !            34: #define PPC_THREAD_STATE        1
        !            35: #define PPC_FLOAT_STATE         2
        !            36: #define PPC_EXCEPTION_STATE    3
        !            37: #define THREAD_STATE_NONE      7
        !            38:               
        !            39: struct ppc_thread_state {
        !            40:        unsigned int srr0;      /* Instruction address register (PC) */
        !            41:        unsigned int srr1;      /* Machine state register (supervisor) */
        !            42:                                /* srr1 may contain SRR_SYSCALL_VAL */
        !            43:        unsigned int r0;
        !            44:        unsigned int r1;
        !            45:        unsigned int r2;
        !            46:        unsigned int r3;
        !            47:        unsigned int r4;
        !            48:        unsigned int r5;
        !            49:        unsigned int r6;
        !            50:        unsigned int r7;
        !            51:        unsigned int r8;
        !            52:        unsigned int r9;
        !            53:        unsigned int r10;
        !            54:        unsigned int r11;
        !            55:        unsigned int r12;
        !            56:        unsigned int r13;
        !            57:        unsigned int r14;
        !            58:        unsigned int r15;
        !            59:        unsigned int r16;
        !            60:        unsigned int r17;
        !            61:        unsigned int r18;
        !            62:        unsigned int r19;
        !            63:        unsigned int r20;
        !            64:        unsigned int r21;
        !            65:        unsigned int r22;
        !            66:        unsigned int r23;
        !            67:        unsigned int r24;
        !            68:        unsigned int r25;
        !            69:        unsigned int r26;
        !            70:        unsigned int r27;
        !            71:        unsigned int r28;
        !            72:        unsigned int r29;
        !            73:        unsigned int r30;
        !            74:        unsigned int r31;
        !            75: 
        !            76:        unsigned int cr;        /* Condition register */
        !            77:        unsigned int xer;       /* User's integer exception register */
        !            78:        unsigned int lr;        /* Link register */
        !            79:        unsigned int ctr;       /* Count register */
        !            80:        unsigned int mq;        /* MQ register (601 only) */
        !            81: 
        !            82:        unsigned int pad;      /* structure TODO - check these! */
        !            83: };
        !            84: 
        !            85: typedef struct ppc_thread_state ppc_thread_state_t;
        !            86: 
        !            87: /* This structure should be double-word aligned for performance */
        !            88: 
        !            89: struct ppc_float_state {
        !            90:        double  fpregs[32];
        !            91: 
        !            92:        unsigned int fpscr_pad; /* fpscr is 64 bits, 32 bits of rubbish */
        !            93:        unsigned int fpscr;     /* floating point status register */
        !            94: };
        !            95: 
        !            96: typedef struct ppc_float_state ppc_float_state_t;
        !            97: 
        !            98: /*
        !            99:  * saved state structure
        !           100:  *
        !           101:  * This structure corresponds to the state of the user registers as saved
        !           102:  * on the stack upon kernel entry (saved in pcb). On interrupts and exceptions
        !           103:  * we save all registers. On system calls we only save the registers not
        !           104:  * saved by the caller.
        !           105:  *
        !           106:  */
        !           107: 
        !           108: struct ppc_saved_state {
        !           109:        unsigned int srr0;      /* Instruction address register (PC) */
        !           110:        unsigned int srr1;      /* Machine state register (supervisor) */
        !           111:                                /* srr1 may contain SRR_SYSCALL_VAL */
        !           112:        unsigned int r0;
        !           113:        unsigned int r1;
        !           114:        unsigned int r2;
        !           115:        unsigned int r3;
        !           116:        unsigned int r4;
        !           117:        unsigned int r5;
        !           118:        unsigned int r6;
        !           119:        unsigned int r7;
        !           120:        unsigned int r8;
        !           121:        unsigned int r9;
        !           122:        unsigned int r10;
        !           123:        unsigned int r11;
        !           124:        unsigned int r12;
        !           125:        unsigned int r13;
        !           126:        unsigned int r14;
        !           127:        unsigned int r15;
        !           128:        unsigned int r16;
        !           129:        unsigned int r17;
        !           130:        unsigned int r18;
        !           131:        unsigned int r19;
        !           132:        unsigned int r20;
        !           133:        unsigned int r21;
        !           134:        unsigned int r22;
        !           135:        unsigned int r23;
        !           136:        unsigned int r24;
        !           137:        unsigned int r25;
        !           138:        unsigned int r26;
        !           139:        unsigned int r27;
        !           140:        unsigned int r28;
        !           141:        unsigned int r29;
        !           142:        unsigned int r30;
        !           143:        unsigned int r31;
        !           144: 
        !           145:        unsigned int cr;        /* Condition register */
        !           146:        unsigned int xer;       /* User's integer exception register */
        !           147:        unsigned int lr;        /* Link register */
        !           148:        unsigned int ctr;       /* Count register */
        !           149:        unsigned int mq;        /* MQ register (601 only) */
        !           150:        unsigned int pad;       /* To mirror pcb_thread_state in pcb*/
        !           151: 
        !           152:        unsigned int sr_copyin; /* SR_COPYIN is used for remapping */
        !           153:        unsigned int pad2;
        !           154:        unsigned int pad3;
        !           155:        unsigned int pad4;
        !           156: };
        !           157: 
        !           158: typedef struct ppc_saved_state ppc_saved_state_t;
        !           159: 
        !           160: /*
        !           161:  * ppc_exception_state
        !           162:  *
        !           163:  * This structure corresponds to some additional state of the user
        !           164:  * registers as saved in the PCB upon kernel entry. They are only
        !           165:  * available if an exception is passed out of the kernel, and even
        !           166:  * then not all are guaranteed to be updated.
        !           167:  *
        !           168:  * Some padding is included in this structure which allows space for
        !           169:  * servers to store temporary values if need be, to maintain binary
        !           170:  * compatiblity.
        !           171:  */
        !           172: 
        !           173: struct ppc_exception_state {
        !           174:        unsigned long dar;      /* Fault registers for coredump */
        !           175:        unsigned long dsisr;
        !           176:        unsigned long exception;/* number of powerpc exception taken */
        !           177:        unsigned long pad0;     /* align to 16 bytes */
        !           178: 
        !           179:        unsigned long pad1[4];  /* space in PCB "just in case" */
        !           180: };
        !           181: 
        !           182: typedef struct ppc_exception_state ppc_exception_state_t;
        !           183: 
        !           184: /*
        !           185:  * Save State Flags
        !           186:  */
        !           187: 
        !           188: #define PPC_THREAD_STATE_COUNT \
        !           189:    (sizeof(struct ppc_thread_state) / sizeof(int))
        !           190: 
        !           191: #define PPC_EXCEPTION_STATE_COUNT \
        !           192:    (sizeof(struct ppc_exception_state) / sizeof(int))
        !           193: 
        !           194: #define PPC_FLOAT_STATE_COUNT \
        !           195:    (sizeof(struct ppc_float_state) / sizeof(int))
        !           196: 
        !           197: /*
        !           198:  * Machine-independent way for servers and Mach's exception mechanism to
        !           199:  * choose the most efficient state flavor for exception RPC's:
        !           200:  */
        !           201: #define MACHINE_THREAD_STATE           PPC_THREAD_STATE
        !           202: #define MACHINE_THREAD_STATE_COUNT     PPC_THREAD_STATE_COUNT
        !           203: 
        !           204: /*
        !           205:  * Largest state on this machine:
        !           206:  */
        !           207: #define THREAD_MACHINE_STATE_MAX       PPC_THREAD_STATE_COUNT
        !           208: 
        !           209: 
        !           210: #define        PPC_THREAD_STATE_FLAVOR_COUNT  3
        !           211: 
        !           212: #define PPC_THREAD_STATE_FLAVOR_LIST_COUNT         \
        !           213:        ( PPC_THREAD_STATE_FLAVOR_COUNT *              \
        !           214:                (sizeof (struct thread_state_flavor) / sizeof(int)))
        !           215: 
        !           216: #endif /* _MACH_PPC_THREAD_STATUS_H_ */

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