Annotation of sys/arch/sparc64/include/reg.h, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: reg.h,v 1.4 2003/06/02 23:27:56 millert Exp $ */
! 2: /* $NetBSD: reg.h,v 1.8 2001/06/19 12:59:16 wiz Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 1992, 1993
! 6: * The Regents of the University of California. All rights reserved.
! 7: *
! 8: * This software was developed by the Computer Systems Engineering group
! 9: * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
! 10: * contributed to Berkeley.
! 11: *
! 12: * All advertising materials mentioning features or use of this software
! 13: * must display the following acknowledgement:
! 14: * This product includes software developed by the University of
! 15: * California, Lawrence Berkeley Laboratory.
! 16: *
! 17: * Redistribution and use in source and binary forms, with or without
! 18: * modification, are permitted provided that the following conditions
! 19: * are met:
! 20: * 1. Redistributions of source code must retain the above copyright
! 21: * notice, this list of conditions and the following disclaimer.
! 22: * 2. Redistributions in binary form must reproduce the above copyright
! 23: * notice, this list of conditions and the following disclaimer in the
! 24: * documentation and/or other materials provided with the distribution.
! 25: * 3. Neither the name of the University nor the names of its contributors
! 26: * may be used to endorse or promote products derived from this software
! 27: * without specific prior written permission.
! 28: *
! 29: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 30: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 31: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 32: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 33: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 34: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 35: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 36: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 37: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 38: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 39: * SUCH DAMAGE.
! 40: *
! 41: * @(#)reg.h 8.1 (Berkeley) 6/11/93
! 42: */
! 43:
! 44: #ifndef _MACHINE_REG_H_
! 45: #define _MACHINE_REG_H_
! 46:
! 47: /*
! 48: * Registers passed to trap/syscall/etc.
! 49: * This structure is known to occupy exactly 80 bytes (see locore.s).
! 50: * Note, tf_global[0] is not actually written (since g0 is always 0).
! 51: * (The slot tf_global[0] is used to send a copy of %wim to kernel gdb.
! 52: * This is known as `cheating'.)
! 53: */
! 54: struct trapframe32 {
! 55: int tf_psr; /* psr */
! 56: int tf_pc; /* return pc */
! 57: int tf_npc; /* return npc */
! 58: int tf_y; /* %y register */
! 59: int tf_global[8]; /* global registers in trap's caller */
! 60: int tf_out[8]; /* output registers in trap's caller */
! 61: };
! 62:
! 63: /*
! 64: * The v9 trapframe is a bit more complex. Since we don't get a free
! 65: * register window with each trap we need some way to keep track of
! 66: * pending traps. We use tf_fault to save the faulting address for
! 67: * memory faults and tf_kstack to thread trapframes on the kernel
! 68: * stack(s). If tf_kstack == 0 then this is the lowest level trap;
! 69: * we came from user mode.
! 70: * (The slot tf_global[0] is used to store the %fp when this is used
! 71: * as a clockframe. This is known as `cheating'.)
! 72: */
! 73: struct trapframe64 {
! 74: int64_t tf_tstate; /* tstate register */
! 75: int64_t tf_pc; /* return pc */
! 76: int64_t tf_npc; /* return npc */
! 77: int64_t tf_fault; /* faulting addr -- need somewhere to save it */
! 78: int64_t tf_kstack; /* kernel stack of prev tf */
! 79: int tf_y; /* %y register -- 32-bits */
! 80: short tf_tt; /* What type of trap this was */
! 81: char tf_pil; /* What IRQ we're handling */
! 82: char tf_oldpil; /* What our old SPL was */
! 83: int64_t tf_global[8]; /* global registers in trap's caller */
! 84: /* n.b. tf_global[0] is used for fp when this is a clockframe */
! 85: int64_t tf_out[8]; /* output registers in trap's caller */
! 86: int64_t tf_local[8]; /* local registers in trap's caller */
! 87: int64_t tf_in[8]; /* in registers in trap's caller (for debug) */
! 88: };
! 89:
! 90: /*
! 91: * Register windows. Each stack pointer (%o6 aka %sp) in each window
! 92: * must ALWAYS point to some place at which it is safe to scribble on
! 93: * 64 bytes. (If not, your process gets mangled.) Furthermore, each
! 94: * stack pointer should be aligned on an 8-byte boundary for v8 stacks
! 95: * or a 16-byte boundary (plus the BIAS) for v9 stacks (the kernel
! 96: * as currently coded allows arbitrary alignment, but with a hefty
! 97: * performance penalty).
! 98: */
! 99: struct rwindow32 {
! 100: int rw_local[8]; /* %l0..%l7 */
! 101: int rw_in[8]; /* %i0..%i7 */
! 102: };
! 103:
! 104: /* Don't forget the BIAS!! */
! 105: struct rwindow64 {
! 106: int64_t rw_local[8]; /* %l0..%l7 */
! 107: int64_t rw_in[8]; /* %i0..%i7 */
! 108: };
! 109:
! 110: /*
! 111: * Clone trapframe for now; this seems to be the more useful
! 112: * than the old struct reg above.
! 113: */
! 114: struct reg32 {
! 115: int r_psr; /* psr */
! 116: int r_pc; /* return pc */
! 117: int r_npc; /* return npc */
! 118: int r_y; /* %y register */
! 119: int r_global[8]; /* global registers in trap's caller */
! 120: int r_out[8]; /* output registers in trap's caller */
! 121: };
! 122:
! 123: struct reg64 {
! 124: int64_t r_tstate; /* tstate register */
! 125: int64_t r_pc; /* return pc */
! 126: int64_t r_npc; /* return npc */
! 127: int r_y; /* %y register -- 32-bits */
! 128: int64_t r_global[8]; /* %g* registers in trap's caller */
! 129: int64_t r_out[8]; /* %o* registers in trap's caller */
! 130: int64_t r_local[8]; /* %l* registers in trap's caller */
! 131: int64_t r_in[8]; /* %i* registers in trap's caller */
! 132: };
! 133:
! 134: #include <machine/fsr.h>
! 135:
! 136: /*
! 137: * FP coprocessor registers.
! 138: *
! 139: * FP_QSIZE is the maximum coprocessor instruction queue depth
! 140: * of any implementation on which the kernel will run. David Hough:
! 141: * ``I'd suggest allowing 16 ... allowing an indeterminate variable
! 142: * size would be even better''. Of course, we cannot do that; we
! 143: * need to malloc these.
! 144: *
! 145: * XXXX UltraSPARC processors don't implement a floating point queue.
! 146: */
! 147: #define FP_QSIZE 16
! 148: #define ALIGNFPSTATE(f) ((struct fpstate64 *)(((long)(f))&(~BLOCK_ALIGN)))
! 149:
! 150: struct fp_qentry {
! 151: int *fq_addr; /* the instruction's address */
! 152: int fq_instr; /* the instruction itself */
! 153: };
! 154:
! 155: struct fpstate64 {
! 156: u_int fs_regs[64]; /* our view is 64 32-bit registers */
! 157: int64_t fs_fsr; /* %fsr */
! 158: int fs_gsr; /* graphics state reg */
! 159: int fs_qsize; /* actual queue depth */
! 160: struct fp_qentry fs_queue[FP_QSIZE]; /* queue contents */
! 161: };
! 162:
! 163: /*
! 164: * For 32-bit emulations.
! 165: */
! 166: struct fpstate32 {
! 167: u_int fs_regs[32]; /* our view is 32 32-bit registers */
! 168: int fs_fsr; /* %fsr */
! 169: int fs_qsize; /* actual queue depth */
! 170: struct fp_qentry fs_queue[FP_QSIZE]; /* queue contents */
! 171: };
! 172:
! 173: /*
! 174: * The actual FP registers are made accessible (c.f. ptrace(2)) through
! 175: * a `struct fpreg'; <arch/sparc64/sparc64/process_machdep.c> relies on the
! 176: * fact that `fpreg' is a prefix of `fpstate'.
! 177: */
! 178: struct fpreg64 {
! 179: u_int fr_regs[64]; /* our view is 64 32-bit registers */
! 180: int64_t fr_fsr; /* %fsr */
! 181: int fr_gsr; /* graphics state reg */
! 182: };
! 183:
! 184: /*
! 185: * 32-bit fpreg used by 32-bit sparc CPUs
! 186: */
! 187: struct fpreg32 {
! 188: u_int fr_regs[32]; /* our view is 32 32-bit registers */
! 189: int fr_fsr; /* %fsr */
! 190: };
! 191:
! 192: /* Here we gotta do naughty things to let gdb work on 32-bit binaries */
! 193: #define reg reg64
! 194: #define fpreg fpreg64
! 195: #define fpstate fpstate64
! 196: #define trapframe trapframe64
! 197: #define rwindow rwindow64
! 198:
! 199: #endif /* _MACHINE_REG_H_ */
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