NetBSD-5.0.2/sys/arch/mipsco/mipsco/machdep.c
/* $NetBSD: machdep.c,v 1.58 2008/07/02 17:28:56 ad Exp $ */
/*
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* the Systems Programming Group of the University of Utah Computer
* Science Department, The Mach Operating System project at
* Carnegie-Mellon University and Ralph Campbell.
*
* 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 8.3 (Berkeley) 1/12/94
*/
/*
* Copyright (c) 1988 University of Utah.
*
* This code is derived from software contributed to Berkeley by
* the Systems Programming Group of the University of Utah Computer
* Science Department, The Mach Operating System project at
* Carnegie-Mellon University and Ralph Campbell.
*
* 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 University of
* California, Berkeley and its contributors.
* 4. 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 8.3 (Berkeley) 1/12/94
*/
#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
__KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.58 2008/07/02 17:28:56 ad Exp $");
/* from: Utah Hdr: machdep.c 1.63 91/04/24 */
#include "opt_ddb.h"
#include "opt_kgdb.h"
#include <sys/param.h>
#include <sys/signalvar.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/buf.h>
#include <sys/reboot.h>
#include <sys/conf.h>
#include <sys/file.h>
#include <sys/callout.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/msgbuf.h>
#include <sys/ioctl.h>
#include <sys/device.h>
#include <sys/user.h>
#include <sys/exec.h>
#include <sys/mount.h>
#include <sys/syscallargs.h>
#include <sys/kcore.h>
#include <sys/ksyms.h>
#include <uvm/uvm_extern.h>
#include <ufs/mfs/mfs_extern.h> /* mfs_initminiroot() */
#include <machine/cpu.h>
#include <machine/reg.h>
#include <machine/psl.h>
#include <machine/pte.h>
#ifdef DDB
#include <machine/db_machdep.h>
#include <ddb/db_extern.h>
#endif
#include <machine/intr.h>
#include <machine/mainboard.h>
#include <machine/sysconf.h>
#include <machine/autoconf.h>
#include <machine/bootinfo.h>
#include <machine/prom.h>
#include <dev/clock_subr.h>
#include <dev/cons.h>
#include <sys/boot_flag.h>
#include "fs_mfs.h"
#include "opt_execfmt.h"
#include "zsc.h" /* XXX */
#include "com.h" /* XXX */
#include "ksyms.h"
/* Our exported CPU info; we can have only one. */
struct cpu_info cpu_info_store;
/* maps for VM objects */
struct vm_map *mb_map = NULL;
struct vm_map *phys_map = NULL;
int physmem; /* max supported memory, changes to actual */
char *bootinfo = NULL; /* pointer to bootinfo structure */
phys_ram_seg_t mem_clusters[VM_PHYSSEG_MAX];
int mem_cluster_cnt;
void to_monitor __P((int)) __attribute__((__noreturn__));
void prom_halt __P((int)) __attribute__((__noreturn__));
#ifdef KGDB
void zs_kgdb_init __P((void));
void kgdb_connect __P((int));
#endif
/*
* Local functions.
*/
int initcpu __P((void));
void configure __P((void));
void mach_init __P((int, char *[], char*[], u_int, char *));
int memsize_scan __P((void *));
#ifdef DEBUG
/* stacktrace code violates prototypes to get callee's registers */
extern void stacktrace __P((void)); /*XXX*/
#endif
/*
* safepri is a safe priority for sleep to set for a spin-wait
* during autoconfiguration or after a panic. Used as an argument to splx().
* XXX disables interrupt 5 to disable mips3 on-chip clock, which also
* disables mips1 FPU interrupts.
*/
int safepri = MIPS3_PSL_LOWIPL; /* XXX */
extern struct user *proc0paddr;
/* locore callback-vector setup */
extern void mips_vector_init __P((void));
extern void prom_init __P((void));
extern void pizazz_init __P((void));
/* platform-specific initialization vector */
static void unimpl_cons_init __P((void));
static void unimpl_iointr __P((unsigned, unsigned, unsigned, unsigned));
static int unimpl_memsize __P((void *));
static void unimpl_intr_establish __P((int, int (*)__P((void *)), void *));
struct platform platform = {
.iobus = "iobus not set",
.cons_init = unimpl_cons_init,
.iointr = unimpl_iointr,
.memsize = unimpl_memsize,
.intr_establish = unimpl_intr_establish,
.clkinit = NULL,
};
struct consdev *cn_tab = NULL;
extern struct consdev consdev_prom;
extern struct consdev consdev_zs;
static void null_cnprobe __P((struct consdev *));
static void prom_cninit __P((struct consdev *));
static int prom_cngetc __P((dev_t));
static void prom_cnputc __P((dev_t, int));
static void null_cnpollc __P((dev_t, int));
struct consdev consdev_prom = {
null_cnprobe,
prom_cninit,
prom_cngetc,
prom_cnputc,
null_cnpollc,
};
/*
* Do all the stuff that locore normally does before calling main().
* Process arguments passed to us by the prom monitor.
* Return the first page address following the system.
*/
void
mach_init(argc, argv, envp, bim, bip)
int argc;
char *argv[];
char *envp[];
u_int bim;
char *bip;
{
u_long first, last;
char *kernend, *v;
char *cp;
int i, howto;
extern char edata[], end[];
const char *bi_msg;
#if NKSYMS || defined(DDB) || defined(LKM)
int nsym = 0;
char *ssym = 0;
char *esym = 0;
struct btinfo_symtab *bi_syms;
#endif
/* Check for valid bootinfo passed from bootstrap */
if (bim == BOOTINFO_MAGIC) {
struct btinfo_magic *bi_magic;
bootinfo = (char *)BOOTINFO_ADDR; /* XXX */
bi_magic = lookup_bootinfo(BTINFO_MAGIC);
if (bi_magic == NULL || bi_magic->magic != BOOTINFO_MAGIC)
bi_msg = "invalid bootinfo structure.\n";
else
bi_msg = NULL;
} else
bi_msg = "invalid bootinfo (standalone boot?)\n";
/* clear the BSS segment */
kernend = (void *)mips_round_page(end);
memset(edata, 0, end - edata);
#if NKSYMS || defined(DDB) || defined(LKM)
bi_syms = lookup_bootinfo(BTINFO_SYMTAB);
/* Load sysmbol table if present */
if (bi_syms != NULL) {
nsym = bi_syms->nsym;
ssym = (void *)bi_syms->ssym;
esym = (void *)bi_syms->esym;
kernend = (void *)mips_round_page(esym);
}
#endif
prom_init();
consinit();
if (bi_msg != NULL)
printf(bi_msg);
/*
* Set the VM page size.
*/
uvm_setpagesize();
/* Find out how much memory is available. */
physmem = memsize_scan(kernend);
/*
* Now that we know how much memory we have, initialize the
* mem cluster array.
*/
mem_clusters[0].start = 0; /* XXX is this correct? */
mem_clusters[0].size = ctob(physmem);
mem_cluster_cnt = 1;
/*
* Copy exception-dispatch code down to exception vector.
* Initialize locore-function vector.
* Clear out the I and D caches.
*/
mips_vector_init();
/* Look at argv[0] and compute bootdev */
makebootdev(argv[0]);
/*
* Look at arguments passed to us and compute boothowto.
*/
boothowto = RB_AUTOBOOT;
for (i = 1; i < argc; i++) {
for (cp = argv[i]; *cp; cp++) {
/* Ignore superfluous '-', if there is one */
if (*cp == '-')
continue;
howto = 0;
BOOT_FLAG(*cp, howto);
if (! howto)
printf("bootflag '%c' not recognised\n", *cp);
else
boothowto |= howto;
}
}
#if NKSYMS || defined(DDB) || defined(LKM)
/* init symbols if present */
if (esym)
ksyms_init(esym - ssym, ssym, esym);
#endif
#ifdef DDB
if (boothowto & RB_KDB)
Debugger();
#endif
#ifdef KGDB
zs_kgdb_init(); /* XXX */
if (boothowto & RB_KDB)
kgdb_connect(0);
#endif
#ifdef MFS
/*
* Check to see if a mini-root was loaded into memory. It resides
* at the start of the next page just after the end of BSS.
*/
if (boothowto & RB_MINIROOT)
kernend += round_page(mfs_initminiroot(kernend));
#endif
/*
* Load the rest of the available pages into the VM system.
*/
first = round_page(MIPS_KSEG0_TO_PHYS(kernend));
last = mem_clusters[0].start + mem_clusters[0].size;
uvm_page_physload(atop(first), atop(last), atop(first), atop(last),
VM_FREELIST_DEFAULT);
/*
* Initialize error message buffer (at end of core).
*/
mips_init_msgbuf();
/*
* Initialize the virtual memory system.
*/
pmap_bootstrap();
/*
* Allocate space for proc0's USPACE.
*/
v = (void *)uvm_pageboot_alloc(USPACE);
lwp0.l_addr = proc0paddr = (struct user *)v;
lwp0.l_md.md_regs = (struct frame *)(v + USPACE) - 1;
proc0paddr->u_pcb.pcb_context[11] =
MIPS_INT_MASK | MIPS_SR_INT_IE; /* SR */
/*
* Set up interrupt handling and I/O addresses.
*/
pizazz_init();
}
/*
* cpu_startup: allocate memory for variable-sized tables,
* initialize CPU, and do autoconfiguration.
*/
void
cpu_startup()
{
vaddr_t minaddr, maxaddr;
char pbuf[9];
#ifdef DEBUG
extern int pmapdebug;
int opmapdebug = pmapdebug;
pmapdebug = 0;
#endif
/*
* Good {morning,afternoon,evening,night}.
*/
printf("%s%s", copyright, version);
printf("%s\n", cpu_model);
format_bytes(pbuf, sizeof(pbuf), ctob(physmem));
printf("total memory = %s\n", pbuf);
minaddr = 0;
/*
* Allocate a submap for physio
*/
phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr,
VM_PHYS_SIZE, true, false, NULL);
/*
* No need to allocate an mbuf cluster submap. Mbuf clusters
* are allocated via the pool allocator, and we use KSEG to
* map those pages.
*/
#ifdef DEBUG
pmapdebug = opmapdebug;
#endif
format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free));
printf("avail memory = %s\n", pbuf);
}
/*
* Look up information in bootinfo of boot loader.
*/
void *
lookup_bootinfo(type)
int type;
{
struct btinfo_common *bt;
char *help = bootinfo;
/* Check for a bootinfo record first. */
if (help == NULL)
return (NULL);
do {
bt = (struct btinfo_common *)help;
if (bt->type == type)
return ((void *)help);
help += bt->next;
} while (bt->next != 0 &&
(size_t)help < (size_t)bootinfo + BOOTINFO_SIZE);
return (NULL);
}
int waittime = -1;
/*
* call PROM to halt or reboot.
*/
void
prom_halt(howto)
int howto;
{
if (howto & RB_HALT)
MIPS_PROM(reinit)();
MIPS_PROM(reboot)();
/* NOTREACHED */
}
void
cpu_reboot(howto, bootstr)
volatile int howto;
char *bootstr;
{
/* take a snap shot before clobbering any registers */
if (curlwp)
savectx((struct user *)curpcb);
#ifdef DEBUG
if (panicstr)
stacktrace();
#endif
/* If system is cold, just halt. */
if (cold) {
howto |= RB_HALT;
goto haltsys;
}
/* If "always halt" was specified as a boot flag, obey. */
if ((boothowto & RB_HALT) != 0)
howto |= RB_HALT;
boothowto = howto;
if ((howto & RB_NOSYNC) == 0 && waittime < 0) {
/*
* Synchronize the disks....
*/
waittime = 0;
vfs_shutdown();
/*
* If we've been adjusting the clock, the todr
* will be out of synch; adjust it now.
*/
resettodr();
}
/* Disable interrupts. */
splhigh();
/* If rebooting and a dump is requested do it. */
#if 0
if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP)
#else
if (howto & RB_DUMP)
#endif
dumpsys();
haltsys:
/* run any shutdown hooks */
doshutdownhooks();
if ((howto & RB_POWERDOWN) == RB_POWERDOWN)
prom_halt(0x80); /* rom monitor RB_PWOFF */
/* Finally, halt/reboot the system. */
printf("%s\n\n", howto & RB_HALT ? "halted." : "rebooting...");
prom_halt(howto & RB_HALT);
/*NOTREACHED*/
}
int
initcpu()
{
spl0(); /* safe to turn interrupts on now */
return 0;
}
static void
unimpl_cons_init()
{
panic("sysconf.init didn't set cons_init");
}
static void
unimpl_iointr(mask, pc, statusreg, causereg)
u_int mask;
u_int pc;
u_int statusreg;
u_int causereg;
{
panic("sysconf.init didn't set intr");
}
static int
unimpl_memsize(first)
void *first;
{
panic("sysconf.init didn't set memsize");
}
void
unimpl_intr_establish(level, func, arg)
int level;
int (*func) __P((void *));
void *arg;
{
panic("sysconf.init didn't init intr_establish");
}
void
delay(n)
int n;
{
DELAY(n);
}
/*
* Find out how much memory is available by testing memory.
* Be careful to save and restore the original contents for msgbuf.
*/
int
memsize_scan(first)
void *first;
{
volatile int *vp, *vp0;
int mem, tmp, tmp0;
#define PATTERN1 0xa5a5a5a5
#define PATTERN2 ~PATTERN1
/*
* Non destructive scan of memory to determine the size
* Use the first page to test for memory aliases. This
* also has the side effect of flushing the bus alignment
* buffer
*/
mem = btoc((paddr_t)first - MIPS_KSEG0_START);
vp = (int *)MIPS_PHYS_TO_KSEG1(mem << PGSHIFT);
vp0 = (int *)MIPS_PHYS_TO_KSEG1(0); /* Start of physical memory */
tmp0 = *vp0;
while (vp < (int *)MIPS_MAX_MEM_ADDR) {
tmp = *vp;
*vp = PATTERN1;
*vp0 = PATTERN2;
wbflush();
if (*vp != PATTERN1)
break;
*vp = PATTERN2;
*vp0 = PATTERN1;
wbflush();
if (*vp != PATTERN2)
break;
*vp = tmp;
vp += PAGE_SIZE/sizeof(int);
mem++;
}
*vp0 = tmp0;
return mem;
}
/*
* Console initialization: called early on from main,
* before vm init or startup. Do enough configuration
* to choose and initialize a console.
*/
static void
null_cnprobe(cn)
struct consdev *cn;
{
}
static void
prom_cninit(cn)
struct consdev *cn;
{
extern const struct cdevsw cons_cdevsw;
cn->cn_dev = makedev(cdevsw_lookup_major(&cons_cdevsw), 0);
cn->cn_pri = CN_REMOTE;
}
static int
prom_cngetc(dev)
dev_t dev;
{
return MIPS_PROM(getchar)();
}
static void
prom_cnputc(dev, c)
dev_t dev;
int c;
{
MIPS_PROM(putchar)(c);
}
static void
null_cnpollc(dev, on)
dev_t dev;
int on;
{
}
void
consinit()
{
int zs_unit;
zs_unit = 0;
cn_tab = &consdev_zs;
(*cn_tab->cn_init)(cn_tab);
}