freebsd-dev/sys/alpha/include/pcb.h
John Baldwin 0bbc882680 Overhaul the per-CPU support a bit:
- The MI portions of struct globaldata have been consolidated into a MI
  struct pcpu.  The MD per-CPU data are specified via a macro defined in
  machine/pcpu.h.  A macro was chosen over a struct mdpcpu so that the
  interface would be cleaner (PCPU_GET(my_md_field) vs.
  PCPU_GET(md.md_my_md_field)).
- All references to globaldata are changed to pcpu instead.  In a UP kernel,
  this data was stored as global variables which is where the original name
  came from.  In an SMP world this data is per-CPU and ideally private to each
  CPU outside of the context of debuggers.  This also included combining
  machine/globaldata.h and machine/globals.h into machine/pcpu.h.
- The pointer to the thread using the FPU on i386 was renamed from
  npxthread to fpcurthread to be identical with other architectures.
- Make the show pcpu ddb command MI with a MD callout to display MD
  fields.
- The globaldata_register() function was renamed to pcpu_init() and now
  init's MI fields of a struct pcpu in addition to registering it with
  the internal array and list.
- A pcpu_destroy() function was added to remove a struct pcpu from the
  internal array and list.

Tested on:	alpha, i386
Reviewed by:	peter, jake
2001-12-11 23:33:44 +00:00

71 lines
2.4 KiB
C

/* $FreeBSD$ */
/* From: NetBSD: pcb.h,v 1.6 1997/04/06 08:47:33 cgd Exp */
/*
* Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University.
* All rights reserved.
*
* Author: Chris G. Demetriou
*
* Permission to use, copy, modify and distribute this software and
* its documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*/
#ifndef _MACHINE_PCB_H_
#define _MACHINE_PCB_H_
#include <machine/frame.h>
#include <machine/reg.h>
#include <machine/alpha_cpu.h>
/*
* PCB: process control block
*
* In this case, the hardware structure that is the defining element
* for a process, and the additional state that must be saved by software
* on a context switch. Fields marked [HW] are mandated by hardware; fields
* marked [SW] are for the software.
*
* It's said in the VMS PALcode section of the AARM that the pcb address
* passed to the swpctx PALcode call has to be a physical address. Not
* knowing this (and trying a virtual) address proved this correct.
* So we cache the physical address of the pcb in the md_proc struct.
*/
struct pcb {
struct alpha_pcb pcb_hw; /* PALcode defined */
unsigned long pcb_context[9]; /* s[0-6], ra, ps [SW] */
struct fpreg pcb_fp; /* FP registers [SW] */
u_int64_t pcb_fp_control; /* IEEE control word [SW] */
unsigned long pcb_onfault; /* for copy faults [SW] */
unsigned long pcb_accessaddr; /* for [fs]uswintr [SW] */
};
/*
* The pcb is augmented with machine-dependent additional data for
* core dumps. For the Alpha, that's a trap frame and the floating
* point registers.
*/
struct md_coredump {
struct trapframe md_tf;
struct fpreg md_fpstate;
};
#endif /* _MACHINE_PCB_H */