File: [local] / sys / arch / alpha / stand / prom_disp.S (download)
Revision 1.1.1.1 (vendor branch), Tue Mar 4 16:04:47 2008 UTC (16 years, 4 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)
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/* $OpenBSD: prom_disp.S,v 1.4 1996/10/30 22:40:34 niklas Exp $ */
/* $NetBSD: prom_disp.S,v 1.5 1996/10/17 02:50:39 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 _LOCORE
#include "include/asm.h"
#include "include/prom.h"
#include "include/rpb.h"
#endif
.globl prom_dispatch_v
.comm prom_dispatch_v,16
.text
.align 4
/*
* Dispatcher routine. Implements prom's calling machinery, saves our
* callee-saved registers as required by C.
*/
#define D_RA (7*8)
#define D_S0 (8*8)
#define D_S1 (9*8)
#define D_S2 (10*8)
#define D_S3 (11*8)
#define D_S4 (12*8)
#define D_S5 (13*8)
#define D_S6 (14*8)
#define DISPATCH_FRAME_SIZE (15*8)
#define DISPATCH_REGS IM_RA|IM_S0|IM_S1|IM_S2|IM_S3|IM_S4|IM_S5|IM_S6
NESTED(prom_dispatch, 5, DISPATCH_FRAME_SIZE, ra, DISPATCH_REGS, 0)
LDGP(pv)
lda sp, -DISPATCH_FRAME_SIZE(sp)
stq ra, D_RA(sp)
stq s0, D_S0(sp)
stq s1, D_S1(sp)
stq s2, D_S2(sp)
stq s3, D_S3(sp)
stq s4, D_S4(sp)
stq s5, D_S5(sp)
stq s6, D_S6(sp)
/* Lord have mercy because.. I would not. */
/* #define STUPID_PROM_IS_32_BITS */
#ifdef STUPID_PROM_IS_32_BITS
ldah s0, 0x2000(zero) /* hack for hack */
lda s0, (0x2000-8)(s0)
stq sp, 0(s0)
or s0, zero, sp
#endif /* STUPID_PROM_IS_32_BITS */
lda pv, prom_dispatch_v
ldq v0, 0(pv) /* routine */
ldq pv, 8(pv) /* routine_arg */
jsr ra, (v0)
#ifdef STUPID_PROM_IS_32_BITS
ldah s0, 0x2000(zero) /* hack for hack */
lda s0, (0x2000-8)(s0)
ldq sp, 0(s0)
#endif /* STUPID_PROM_IS_32_BITS */
ldq ra, D_RA(sp)
ldq s0, D_S0(sp)
ldq s1, D_S1(sp)
ldq s2, D_S2(sp)
ldq s3, D_S3(sp)
ldq s4, D_S4(sp)
ldq s5, D_S5(sp)
ldq s6, D_S6(sp)
lda sp, DISPATCH_FRAME_SIZE(sp)
RET
END(prom_dispatch)
#undef D_RA
#undef D_S0
#undef D_S1
#undef D_S2
#undef D_S3
#undef D_S4
#undef D_S5
#undef D_S6
#undef DISPATCH_FRAME_SIZE
#undef DISPATCH_REGS