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pcb.h revision 1.15 
      1 /*	$NetBSD: pcb.h,v 1.15 2007/09/15 09:25:22 scw Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2001 Matt Thomas <matt (at) 3am-software.com>.
      5  * Copyright (c) 1994 Mark Brinicombe.
      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 the RiscBSD team.
     19  * 4. The name "RiscBSD" nor the name of the author may be used to
     20  *    endorse or promote products derived from this software without specific
     21  *    prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY RISCBSD ``AS IS'' AND ANY EXPRESS OR IMPLIED
     24  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
     25  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     26  * IN NO EVENT SHALL RISCBSD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
     27  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     28  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
     29  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  */
     35 
     36 #ifndef	_ARM_PCB_H_
     37 #define	_ARM_PCB_H_
     38 
     39 #include <machine/frame.h>
     40 #include <machine/fp.h>
     41 
     42 #include <arm/arm32/pte.h>
     43 
     44 struct trapframe;
     45 
     46 struct pcb_arm32 {
     47 	/*
     48 	 * WARNING!
     49 	 * cpuswitch.S relies on pcb32_r8 being quad-aligned in struct pcb
     50 	 * (due to the use of "strd" when compiled for XSCALE)
     51 	 */
     52 	u_int	pcb32_r8 __aligned(8);		/* used */
     53 	u_int	pcb32_r9;			/* used */
     54 	u_int	pcb32_r10;			/* used */
     55 	u_int	pcb32_r11;			/* used */
     56 	u_int	pcb32_r12;			/* used */
     57 	u_int	pcb32_sp;			/* used */
     58 	u_int	pcb32_lr;
     59 	u_int	pcb32_pc;
     60 	u_int	pcb32_und_sp;
     61 };
     62 #define	pcb_pagedir	pcb_un.un_32.pcb32_pagedir
     63 #define	pcb_pl1vec	pcb_un.un_32.pcb32_pl1vec
     64 #define	pcb_l1vec	pcb_un.un_32.pcb32_l1vec
     65 #define	pcb_dacr	pcb_un.un_32.pcb32_dacr
     66 #define	pcb_cstate	pcb_un.un_32.pcb32_cstate
     67 
     68 struct pcb_arm26 {
     69 	struct	switchframe *pcb26_sf;
     70 };
     71 #define	pcb_sf	pcb_un.un_26.pcb26_sf
     72 
     73 /*
     74  * WARNING!
     75  * See warning for struct pcb_arm32, above, before changing struct pcb!
     76  */
     77 struct pcb {
     78 	u_int	pcb_flags;
     79 #define	PCB_OWNFPU	0x00000001
     80 #define	PCB_NOALIGNFLT	0x00000002		/* For EXEC_AOUT */
     81 	struct	trapframe *pcb_tf;
     82 	void *	pcb_onfault;			/* On fault handler */
     83 	union	{
     84 		struct	pcb_arm32 un_32;
     85 		struct	pcb_arm26 un_26;
     86 	} pcb_un;
     87 	struct	fpe_sp_state pcb_fpstate;	/* Floating Point state */
     88 };
     89 #define	pcb_ff	pcb_fpstate			/* for arm26 */
     90 
     91 /*
     92  * No additional data for core dumps.
     93  */
     94 struct md_coredump {
     95 	int	md_empty;
     96 };
     97 
     98 #ifdef _KERNEL
     99 #ifdef _KERNEL_OPT
    100 #include "opt_multiprocessor.h"
    101 #endif
    102 #ifdef MULTIPROCESSOR
    103 #define curpcb	(curcpu()->ci_curpcb)
    104 #else
    105 extern struct pcb *curpcb;
    106 #endif
    107 #endif	/* _KERNEL */
    108 
    109 #endif	/* _ARM_PCB_H_ */
    110