NetBSD-5.0.2/sys/arch/pmax/pmax/machdep.c
/* $NetBSD: machdep.c,v 1.223.8.1 2009/07/26 18:45:01 snj 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
* from: Utah Hdr: machdep.c 1.63 91/04/24
*/
/*
* 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
* from: Utah Hdr: machdep.c 1.63 91/04/24
*/
#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
__KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.223.8.1 2009/07/26 18:45:01 snj Exp $");
#include "fs_mfs.h"
#include "opt_ddb.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/buf.h>
#include <sys/reboot.h>
#include <sys/user.h>
#include <sys/mount.h>
#include <sys/kcore.h>
#include <sys/boot_flag.h>
#include <sys/ksyms.h>
#include <sys/proc.h>
#include <uvm/uvm_extern.h>
#include <dev/cons.h>
#include <ufs/mfs/mfs_extern.h> /* mfs_initminiroot() */
#include <mips/cache.h>
#include <machine/psl.h>
#include <machine/autoconf.h>
#include <machine/dec_prom.h>
#include <machine/sysconf.h>
#include <machine/bootinfo.h>
#include <machine/locore.h>
#include <pmax/pmax/machdep.h>
#define _PMAX_BUS_DMA_PRIVATE
#include <machine/bus.h>
#if NKSYMS || defined(DDB) || defined(LKM)
#include <sys/exec_aout.h> /* XXX backwards compatilbity for DDB */
#include <machine/db_machdep.h>
#include <ddb/db_extern.h>
#endif
#include "opt_dec_3min.h"
#include "opt_dec_maxine.h"
#include "opt_dec_3maxplus.h"
#include "ksyms.h"
unsigned ssir; /* simulated interrupt register */
/* 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 systype; /* mother board type */
char *bootinfo = NULL; /* pointer to bootinfo structure */
int cpuspeed = 30; /* approx # instr per usec. */
int physmem; /* max supported memory, changes to actual */
int physmem_boardmax; /* {model,SIMM}-specific bound on physmem */
int mem_cluster_cnt;
phys_ram_seg_t mem_clusters[VM_PHYSSEG_MAX];
/*
* During autoconfiguration or after a panic, a sleep will simply
* lower the priority briefly to allow interrupts, then return.
* The priority to be used (safepri) is machine-dependent, thus this
* value is initialized and maintained in the machine-dependent layers.
* This priority will typically be 0, or the lowest priority
* that is safe for use on the interrupt stack; it can be made
* higher to block network software interrupts after panics.
*/
/*
* 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 */
void mach_init __P((int, char *[], int, int, u_int, char *)); /* XXX */
/* Motherboard or system-specific initialization vector */
static void unimpl_bus_reset __P((void));
static void unimpl_cons_init __P((void));
static void unimpl_iointr __P((unsigned, unsigned, unsigned, unsigned));
static void unimpl_intr_establish __P((struct device *, void *, int,
int (*)(void *), void *));
static int unimpl_memsize __P((void *));
static unsigned nullwork __P((void));
struct platform platform = {
"iobus not set",
unimpl_bus_reset,
unimpl_cons_init,
unimpl_iointr,
unimpl_intr_establish,
unimpl_memsize,
(void *)nullwork,
};
extern void *esym; /* XXX */
extern struct user *proc0paddr; /* XXX */
extern struct consdev promcd; /* XXX */
/*
* Do all the stuff that locore normally does before calling main().
* The first 4 argments are passed by PROM monitor, and remaining two
* are built on temporary stack by our boot loader.
*/
void
mach_init(argc, argv, code, cv, bim, bip)
int argc;
char *argv[];
int code, cv;
u_int bim;
char *bip;
{
char *cp;
const char *bootinfo_msg;
u_long first, last;
int i;
char *kernend;
#if NKSYMS || defined(DDB) || defined(LKM)
void *ssym = 0;
struct btinfo_symtab *bi_syms;
struct exec *aout; /* XXX backwards compatilbity for DDB */
#endif
extern char edata[], end[]; /* XXX */
/* Set up bootinfo structure looking at stack. */
if (bim == BOOTINFO_MAGIC) {
struct btinfo_magic *bi_magic;
bootinfo = bip;
bi_magic = lookup_bootinfo(BTINFO_MAGIC);
if (bi_magic == NULL || bi_magic->magic != BOOTINFO_MAGIC)
bootinfo_msg =
"invalid magic number in bootinfo structure.\n";
else
bootinfo_msg = NULL;
}
else
bootinfo_msg = "invalid bootinfo pointer (old bootblocks?)\n";
/* clear the BSS segment */
#if NKSYMS || defined(DDB) || defined(LKM)
bi_syms = lookup_bootinfo(BTINFO_SYMTAB);
aout = (struct exec *)edata;
/* Was it a valid bootinfo symtab info? */
if (bi_syms != NULL) {
ssym = (void *)bi_syms->ssym;
esym = (void *)bi_syms->esym;
kernend = (void *)mips_round_page(esym);
memset(edata, 0, end - edata);
} else
#ifdef EXEC_AOUT
/* XXX: Backwards compatibility with old bootblocks - this should
* go soon...
*/
/* Exec header and symbols? */
if (aout->a_midmag == 0x07018b00 && (i = aout->a_syms) != 0) {
ssym = end;
i += (*(long *)(end + i + 4) + 3) & ~3; /* strings */
esym = end + i + 4;
kernend = (void *)mips_round_page(esym);
memset(edata, 0, end - edata);
} else
#endif
#endif
{
kernend = (void *)mips_round_page(end);
memset(edata, 0, kernend - edata);
}
/* Initialize callv so we can do PROM output... */
callv = (code == DEC_PROM_MAGIC) ? (void *)cv : &callvec;
/* Use PROM console output until we initialize a console driver. */
cn_tab = &promcd;
#if 0
if (bootinfo_msg != NULL)
printf(bootinfo_msg);
#endif
/*
* Set the VM page size.
*/
uvm_setpagesize();
/*
* Copy exception-dispatch code down to exception vector.
* Initialize locore-function vector.
* Clear out the I and D caches.
*/
mips_vector_init();
/*
* We know the CPU type now. Initialize our DMA tags (might
* need this early, for certain types of console devices!!).
*/
pmax_bus_dma_init();
/* Check for direct boot from DS5000 REX monitor */
if (argc > 0 && strcmp(argv[0], "boot") == 0) {
argc--;
argv++;
}
/* Look at argv[0] and compute bootdev */
makebootdev(argv[0]);
/*
* Look at arguments passed to us and compute boothowto.
*/
boothowto = RB_SINGLE;
#ifdef KADB
boothowto |= RB_KDB;
#endif
for (i = 1; i < argc; i++) {
for (cp = argv[i]; *cp; cp++) {
switch (*cp) {
case 'a': /* autoboot */
boothowto &= ~RB_SINGLE;
break;
case 'n': /* ask for names */
boothowto |= RB_ASKNAME;
break;
case 'N': /* don't ask for names */
boothowto &= ~RB_ASKNAME;
break;
default:
BOOT_FLAG(*cp, boothowto);
break;
}
}
}
#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
#if NKSYMS || defined(DDB) || defined(LKM)
/* init symbols if present */
if (esym)
ksyms_init((char *)esym - (char *)ssym, ssym, esym);
#endif
#ifdef DDB
if (boothowto & RB_KDB)
Debugger();
#endif
/*
* Alloc u pages for proc0 stealing KSEG0 memory.
*/
lwp0.l_addr = proc0paddr = (struct user *)kernend;
lwp0.l_md.md_regs = (struct frame *)(kernend + USPACE) - 1;
memset(lwp0.l_addr, 0, USPACE);
proc0paddr->u_pcb.pcb_context[11] =
MIPS_INT_MASK | MIPS_SR_INT_IE; /* SR */
kernend += USPACE;
/*
* Initialize physmem_boardmax; assume no SIMM-bank limits.
* Adjust later in model-specific code if necessary.
*/
physmem_boardmax = MIPS_MAX_MEM_ADDR;
/*
* Determine what model of computer we are running on.
*/
systype = ((prom_systype() >> 16) & 0xff);
if (systype >= nsysinit) {
platform_not_supported();
/* NOTREACHED */
}
/* Machine specific initialization. */
(*sysinit[systype].init)();
/* Interrupt initialization. */
intr_init();
/* Find out how much memory is available. */
physmem = (*platform.memsize)(kernend);
/*
* Load the rest of the available pages into the VM system.
* Put the first 8M of RAM onto a lower-priority free list, since
* some TC boards (e.g. PixelStamp boards) are only able to DMA
* into this region, and we want them to have a fighting chance of
* allocating their DMA memory during autoconfiguration.
*/
for (i = 0, physmem = 0; i < mem_cluster_cnt; ++i) {
first = mem_clusters[i].start;
if (first == 0)
first = round_page(MIPS_KSEG0_TO_PHYS(kernend));
last = mem_clusters[i].start + mem_clusters[i].size;
physmem += atop(mem_clusters[i].size);
if (i != 0 || last <= (8 * 1024 * 1024)) {
uvm_page_physload(atop(first), atop(last), atop(first),
atop(last), VM_FREELIST_DEFAULT);
} else {
uvm_page_physload(atop(first), atop(8 * 1024 * 1024),
atop(first), atop(8 * 1024 * 1024), VM_FREELIST_FIRST8);
uvm_page_physload(atop(8 * 1024 * 1024), atop(last),
atop(8 * 1024 * 1024), atop(last), VM_FREELIST_DEFAULT);
}
}
/*
* Initialize error message buffer (at end of core).
*/
mips_init_msgbuf();
/*
* Initialize the virtual memory system.
*/
pmap_bootstrap();
}
void
mips_machdep_cache_config(void)
{
/* All r4k pmaxen have a 1MB L2 cache. */
if (CPUISMIPS3)
mips_sdcache_size = 1024 * 1024;
}
void
consinit()
{
(*platform.cons_init)();
}
/*
* Machine-dependent startup code: allocate memory for variable-sized
* tables.
*/
void
cpu_startup()
{
vaddr_t minaddr, maxaddr;
char pbuf[9];
#ifdef DEBUG
extern int pmapdebug; /* XXX */
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, 0, 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);
}
void
cpu_reboot(howto, bootstr)
volatile int howto; /* XXX volatile to keep gcc happy */
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) {
/*
* Synchronize the disks....
*/
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) != 0)
#endif
dumpsys();
haltsys:
/* run any shutdown hooks */
doshutdownhooks();
/* Finally, halt/reboot the system. */
printf("%s\n\n", ((howto & RB_HALT) != 0) ? "halted." : "rebooting...");
prom_halt(howto & RB_HALT, bootstr);
/*NOTREACHED*/
}
/*
* 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;
{
int i, mem;
char *cp;
mem = btoc((paddr_t)first - MIPS_KSEG0_START);
cp = (char *)MIPS_PHYS_TO_KSEG1(mem << PGSHIFT);
while (cp < (char *)physmem_boardmax) {
int j;
if (badaddr(cp, 4))
break;
i = *(int *)cp;
j = ((int *)cp)[4];
*(int *)cp = 0xa5a5a5a5;
/*
* Data will persist on the bus if we read it right away.
* Have to be tricky here.
*/
((int *)cp)[4] = 0x5a5a5a5a;
wbflush();
if (*(int *)cp != 0xa5a5a5a5)
break;
*(int *)cp = i;
((int *)cp)[4] = j;
cp += PAGE_SIZE;
mem++;
}
/*
* 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(mem);
mem_cluster_cnt = 1;
/* clear any memory error conditions possibly caused by probe */
(*platform.bus_reset)();
return (mem);
}
/*
* Find out how much memory is available by using the PROM bitmap.
*/
int
memsize_bitmap(first)
void *first;
{
memmap *prom_memmap = (memmap *)first;
int i, mapbytes;
int segstart, curaddr, xsize, segnum;
mapbytes = prom_getbitmap(prom_memmap);
if (mapbytes == 0)
return (memsize_scan(first));
segstart = curaddr = i = segnum = 0;
xsize = prom_memmap->pagesize * 8;
while (i < mapbytes) {
while (prom_memmap->bitmap[i] == 0xff && i < mapbytes) {
++i;
curaddr += xsize;
}
if (curaddr > segstart) {
mem_clusters[segnum].start = segstart;
mem_clusters[segnum].size = curaddr - segstart;
++segnum;
}
while (i < mapbytes && prom_memmap->bitmap[i] != 0xff) {
++i;
curaddr += xsize;
}
segstart = curaddr;
}
mem_cluster_cnt = segnum;
for (i = 0; i < segnum; ++i) {
printf("segment %2d start %08lx size %08lx\n", i,
(long)mem_clusters[i].start, (long)mem_clusters[i].size);
}
return (mapbytes * 8);
}
/*
* Ensure all platform vectors are always initialized.
*/
static void
unimpl_bus_reset()
{
panic("sysconf.init didn't set bus_reset");
}
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 void
unimpl_intr_establish(dev, cookie, level, handler, arg)
struct device *dev;
void *cookie;
int level;
int (*handler) __P((void *));
void *arg;
{
panic("sysconf.init didn't set intr_establish");
}
static int
unimpl_memsize(first)
void *first;
{
panic("sysconf.init didn't set memsize");
}
static unsigned
nullwork()
{
return (0);
}
/*
* Wait "n" microseconds. (scsi code needs this).
*/
void
delay(n)
int n;
{
DELAY(n);
}