File: [local] / sys / arch / alpha / alpha / multiproc.s (download)
Revision 1.1.1.1 (vendor branch), Tue Mar 4 16:04:43 2008 UTC (16 years, 3 months ago) by nbrk
Branch: OPENBSD_4_2_BASE, MAIN
CVS Tags: jornada-partial-support-wip, HEAD Changes since 1.1: +0 -0 lines
Import of OpenBSD 4.2 release kernel tree with initial code to support
Jornada 720/728, StrongARM 1110-based handheld PC.
At this point kernel roots on NFS and boots into vfs_mountroot() and traps.
What is supported:
- glass console, Jornada framebuffer (jfb) works in 16bpp direct color mode
(needs some palette tweaks for non black/white/blue colors, i think)
- saic, SA11x0 interrupt controller (needs cleanup)
- sacom, SA11x0 UART (supported only as boot console for now)
- SA11x0 GPIO controller fully supported (but can't handle multiple interrupt
handlers on one gpio pin)
- sassp, SSP port on SA11x0 that attaches spibus
- Jornada microcontroller (jmcu) to control kbd, battery, etc throught
the SPI bus (wskbd attaches on jmcu, but not tested)
- tod functions seem work
- initial code for SA-1111 (chip companion) : this is TODO
Next important steps, i think:
- gpio and intc on sa1111
- pcmcia support for sa11x0 (and sa1111 help logic)
- REAL root on nfs when we have PCMCIA support (we may use any of supported pccard NICs)
- root on wd0! (using already supported PCMCIA-ATA)
|
/* $OpenBSD: multiproc.s,v 1.2 2000/11/08 19:16:59 ericj Exp $ */
/* $NetBSD: multiproc.s,v 1.5 1999/12/16 20:17:23 thorpej Exp $ */
/*-
* Copyright (c) 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
* NASA Ames Research Center.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
__KERNEL_RCSID(5, "$NetBSD: multiproc.s,v 1.5 1999/12/16 20:17:23 thorpej Exp $")
/*
* Multiprocessor glue code.
*/
.text
inc5: .stabs __FILE__,132,0,0,inc5; .loc 1 __LINE__
/*
* cpu_spinup_trampoline:
*
* We come here via the secondary processor's console. We simply
* make the function call look right, and call cpu_hatch() to finish
* starting up the processor.
*
* We are provided an argument in $27 (pv) (which will be our cpu_info).
*/
NESTED_NOPROFILE(cpu_spinup_trampoline,0,0,ra,0,0)
mov pv, s0 /* squirrel away argument */
br pv, 1f /* compute new GP */
1: LDGP(pv)
/* Invalidate TLB and I-stream. */
ldiq a0, -2 /* TBIA */
call_pal PAL_OSF1_tbi
call_pal PAL_imb
/* Load KGP with current GP. */
mov gp, a0
call_pal PAL_OSF1_wrkgp /* clobbers a0, t0, t8-t11 */
/* Restore argument and write it in SysValue. */
mov s0, a0
call_pal PAL_OSF1_wrval
/* Restore argument and call cpu_hatch() */
mov s0, a0
CALL(cpu_hatch)
/* cpu_hatch() returned! Just halt (forever). */
2: call_pal PAL_halt
br zero, 2b
END(cpu_spinup_trampoline)