File: [local] / sys / arch / landisk / stand / boot / delay.c (download)
Revision 1.1.1.1 (vendor branch), Tue Mar 4 16:08:56 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)
|
/* $OpenBSD: delay.c,v 1.1 2006/10/06 21:48:50 mickey Exp $ */
/* $NetBSD: delay.c,v 1.1 2006/09/01 21:26:18 uwe Exp $ */
/*-
* Copyright (c) 2005 NONAKA Kimihiro
* All rights reserved.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*/
#include <sys/param.h>
#include <libsa.h>
#include <sh/tmureg.h>
#ifndef TICK_CH
#define TICK_CH 0
#endif
#if TICK_CH == 0
#define TSTR SH4_TSTR
#define TCOR SH4_TCOR0
#define TCNT SH4_TCNT0
#define TCR SH4_TCR0
#define TSTR_CH TSTR_STR0
#elif TICK_CH == 1
#define TSTR SH4_TSTR
#define TCOR SH4_TCOR1
#define TCNT SH4_TCNT1
#define TCR SH4_TCR1
#define TSTR_CH TSTR_STR1
#elif TICK_CH == 2
#define TSTR SH4_TSTR
#define TCOR SH4_TCOR2
#define TCNT SH4_TCNT2
#define TCR SH4_TCR2
#define TSTR_CH TSTR_STR2
#elif TICK_CH == 3
#define TSTR SH4_TSTR2
#define TCOR SH4_TCOR3
#define TCNT SH4_TCNT3
#define TCR SH4_TCR3
#define TSTR_CH SH4_TSTR2_STR3
#elif TICK_CH == 4
#define TSTR SH4_TSTR2
#define TCOR SH4_TCOR4
#define TCNT SH4_TCNT4
#define TCR SH4_TCR4
#define TSTR_CH SH4_TSTR2_STR4
#else
#error TICK_CH != [01234]
#endif
#ifndef TICK_PRESC
#define TICK_PRESC 1024
#endif
#if TICK_PRESC == 4
#define TCR_TPSC TCR_TPSC_P4
#elif TICK_PRESC == 16
#define TCR_TPSC TCR_TPSC_P16
#elif TICK_PRESC == 64
#define TCR_TPSC TCR_TPSC_P64
#elif TICK_PRESC == 256
#define TCR_TPSC TCR_TPSC_P256
#elif TICK_PRESC == 1024
#define TCR_TPSC SH4_TCR_TPSC_P1024
#else
#error TICK_PRESC != 4, 16, 64, 256, 1024
#endif
#define TICKS_PER_SEC (PCLOCK / TICK_PRESC)
#define MS_PER_TICK (1000000 / TICKS_PER_SEC)
int
tick_init(void)
{
_reg_bclr_1(TSTR, TSTR_CH);
_reg_write_2(TCR, TCR_TPSC);
_reg_write_4(TCOR, 0xffffffff);
_reg_write_4(TCNT, 0xffffffff);
_reg_bset_1(TSTR, TSTR_CH);
return 0;
}
void
tick_stop(void)
{
_reg_bclr_1(TSTR, TSTR_CH);
}
uint32_t
gettick(void)
{
return ~(_reg_read_4(TCNT));
}
void
delay(int ms)
{
uint32_t base, now;
base = gettick();
for (;;) {
now = gettick();
if (((now - base) / MS_PER_TICK) > ms) {
break;
}
}
}