298 lines
7.8 KiB
C
298 lines
7.8 KiB
C
/* $NetBSD: machdep.c,v 1.26 2003/08/07 16:27:19 agc Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 1996, 1997, 1998, 2002 The NetBSD Foundation, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to The NetBSD Foundation
|
|
* by Charles M. Hannum and 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.
|
|
*/
|
|
|
|
/*-
|
|
* Copyright (c) 1982, 1987, 1990 The Regents of the University of California.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* William Jolitz.
|
|
*
|
|
* 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. Neither the name of the University 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 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.
|
|
*
|
|
* @(#)machdep.c 7.4 (Berkeley) 6/3/91
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.26 2003/08/07 16:27:19 agc Exp $");
|
|
|
|
#include "opt_ddb.h"
|
|
#include "opt_kgdb.h"
|
|
#include "opt_memsize.h"
|
|
#include "scif.h"
|
|
#include "opt_kloader.h"
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/user.h>
|
|
#include <sys/mount.h>
|
|
#include <sys/reboot.h>
|
|
#include <sys/sysctl.h>
|
|
#include <sys/ksyms.h>
|
|
|
|
#ifdef KGDB
|
|
#include <sys/kgdb.h>
|
|
#include <sh3/dev/scifvar.h>
|
|
#endif
|
|
#ifdef DDB
|
|
#include <machine/db_machdep.h>
|
|
#include <ddb/db_extern.h>
|
|
#endif
|
|
|
|
#include <sh3/cpu.h>
|
|
#include <sh3/exception.h>
|
|
#include <sh3/bscreg.h>
|
|
#include <machine/intr.h>
|
|
#include <machine/kloader.h>
|
|
|
|
#include <dev/cons.h>
|
|
|
|
#include "ksyms.h"
|
|
|
|
/* the following is used externally (sysctl_hw) */
|
|
char machine[] = MACHINE; /* dreamcast */
|
|
char machine_arch[] = MACHINE_ARCH; /* sh3el */
|
|
|
|
void main(void) __attribute__((__noreturn__));
|
|
void dreamcast_startup(void) __attribute__((__noreturn__));
|
|
|
|
void
|
|
dreamcast_startup()
|
|
{
|
|
extern char edata[], end[];
|
|
paddr_t kernend;
|
|
|
|
/* Clear bss */
|
|
memset(edata, 0, end - edata);
|
|
|
|
/* Initialize CPU ops. */
|
|
sh_cpu_init(CPU_ARCH_SH4, CPU_PRODUCT_7750);
|
|
|
|
/* Console */
|
|
consinit();
|
|
|
|
/* Load memory to UVM */
|
|
physmem = atop(IOM_RAM_SIZE);
|
|
kernend = atop(round_page(SH3_P1SEG_TO_PHYS(end)));
|
|
uvm_page_physload(
|
|
kernend, atop(IOM_RAM_BEGIN + IOM_RAM_SIZE),
|
|
kernend, atop(IOM_RAM_BEGIN + IOM_RAM_SIZE),
|
|
VM_FREELIST_DEFAULT);
|
|
|
|
/* Initialize proc0 u-area */
|
|
sh_proc0_init();
|
|
|
|
/* Initialize pmap and start to address translation */
|
|
pmap_bootstrap();
|
|
|
|
/* Debugger. */
|
|
#if NKSYMS || defined(DDB) || defined(LKM)
|
|
ksyms_init(0, NULL, NULL);
|
|
#endif
|
|
#if defined(KGDB) && (NSCIF > 0)
|
|
if (scif_kgdb_init() == 0) {
|
|
kgdb_debug_init = 1;
|
|
kgdb_connect(1);
|
|
}
|
|
#endif /* KGDB && NSCIF > 0 */
|
|
|
|
/* Jump to main */
|
|
__asm__ __volatile__(
|
|
"jmp @%0;"
|
|
"mov %1, sp"
|
|
:: "r"(main),"r"(lwp0.l_md.md_pcb->pcb_sf.sf_r7_bank));
|
|
/* NOTREACHED */
|
|
while (1)
|
|
;
|
|
}
|
|
|
|
void
|
|
consinit()
|
|
{
|
|
static int initted;
|
|
|
|
if (initted)
|
|
return;
|
|
initted = 1;
|
|
|
|
cninit();
|
|
}
|
|
|
|
void
|
|
cpu_startup()
|
|
{
|
|
|
|
strcpy(cpu_model, "SEGA Dreamcast\n");
|
|
|
|
sh_startup();
|
|
}
|
|
|
|
int
|
|
cpu_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp,
|
|
void *newp, size_t newlen, struct proc *p)
|
|
{
|
|
/* all sysctl names at this level are terminal */
|
|
if (namelen != 1)
|
|
return (ENOTDIR); /* overloaded */
|
|
|
|
switch (name[0]) {
|
|
case CPU_CONSDEV:
|
|
return (sysctl_rdstruct(oldp, oldlenp, newp, &cn_tab->cn_dev,
|
|
sizeof cn_tab->cn_dev));
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return (EOPNOTSUPP);
|
|
}
|
|
|
|
void
|
|
cpu_reboot(int howto, char *bootstr)
|
|
{
|
|
static int waittime = -1;
|
|
|
|
if (cold) {
|
|
howto |= RB_HALT;
|
|
goto haltsys;
|
|
}
|
|
|
|
#ifdef KLOADER
|
|
if ((howto & RB_HALT) == 0) {
|
|
if ((howto & RB_STRING) && bootstr != NULL) {
|
|
printf("loading a new kernel: %s\n", bootstr);
|
|
kloader_reboot_setup(bootstr);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
boothowto = howto;
|
|
if ((howto & RB_NOSYNC) == 0 && waittime < 0) {
|
|
waittime = 0;
|
|
vfs_shutdown();
|
|
/*
|
|
* If we've been adjusting the clock, the todr
|
|
* will be out of synch; adjust it now.
|
|
*/
|
|
#if 0
|
|
resettodr();
|
|
#endif
|
|
}
|
|
|
|
/* Disable interrupts. */
|
|
splhigh();
|
|
|
|
/* Do a dump if requested. */
|
|
if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP)
|
|
dumpsys();
|
|
|
|
haltsys:
|
|
doshutdownhooks();
|
|
|
|
if (howto & RB_HALT) {
|
|
printf("\n");
|
|
printf("The operating system has halted.\n");
|
|
printf("Please press any key to reboot.\n\n");
|
|
cngetc();
|
|
}
|
|
|
|
#ifdef KLOADER
|
|
else if ((howto & RB_STRING) && bootstr != NULL) {
|
|
kloader_reboot();
|
|
printf("\nFailed to load a new kernel.\n");
|
|
cngetc();
|
|
}
|
|
#endif
|
|
|
|
printf("rebooting...\n");
|
|
cpu_reset();
|
|
for(;;)
|
|
;
|
|
/*NOTREACHED*/
|
|
}
|
|
|
|
void
|
|
intc_intr(int ssr, int spc, int ssp)
|
|
{
|
|
struct intc_intrhand *ih;
|
|
int s, evtcode;
|
|
|
|
evtcode = _reg_read_4(SH4_INTEVT);
|
|
|
|
ih = EVTCODE_IH(evtcode);
|
|
KDASSERT(ih->ih_func);
|
|
/*
|
|
* On entry, all interrrupts are disabled, and exception is enabled.
|
|
* Enable higher level interrupt here.
|
|
*/
|
|
s = _cpu_intr_resume(ih->ih_level);
|
|
|
|
if (evtcode == SH_INTEVT_TMU0_TUNI0) { /* hardclock */
|
|
struct clockframe cf;
|
|
cf.spc = spc;
|
|
cf.ssr = ssr;
|
|
cf.ssp = ssp;
|
|
(*ih->ih_func)(&cf);
|
|
} else {
|
|
(*ih->ih_func)(ih->ih_arg);
|
|
}
|
|
}
|