freebsd-dev/sys/boot/alpha/common/main.c

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/*-
* Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
* Copyright (c) 1998 Doug Rabson <dfr@freebsd.org>
* 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 AUTHOR 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 AUTHOR 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.
*
1999-08-28 01:08:13 +00:00
* $FreeBSD$
*/
#include <stand.h>
#include <string.h>
#include <sys/param.h>
#include <machine/rpb.h>
#include <machine/prom.h>
#include "bootstrap.h"
#include "libalpha/libalpha.h"
extern char bootprog_name[], bootprog_rev[], bootprog_date[], bootprog_maker[];
struct alpha_devdesc currdev; /* our current device */
struct arch_switch archsw; /* MI/MD interface boundary */
extern char end[];
extern void OSFpal(void);
extern void halt(void);
unsigned long
memsize()
{
struct rpb *hwrpb = (struct rpb *)HWRPB_ADDR;
struct mddt *mddtp;
struct mddt_cluster *memc;
int i;
unsigned long total = 0;
mddtp = (struct mddt *)(((caddr_t)hwrpb) + hwrpb->rpb_memdat_off);
for (i = 0; i < mddtp->mddt_cluster_cnt; i++) {
memc = &mddtp->mddt_clusters[i];
total += memc->mddt_pg_cnt << PAGE_SHIFT;
}
return total;
}
/* #define XTRA_PAGES 32 */
#define XTRA_PAGES 64
void
extend_heap(void)
{
struct rpb *hwrpb = (struct rpb *)HWRPB_ADDR;
struct mddt *mddtp;
struct mddt_cluster *memc = 0;
int i;
unsigned long startpfn;
vm_offset_t startva;
vm_offset_t startpte;
/*
* Find the last usable memory cluster and add some of its pages
* to our address space. The 256k allowed by the firmware isn't quite
* adequate for our needs.
*/
mddtp = (struct mddt *)(((caddr_t)hwrpb) + hwrpb->rpb_memdat_off);
for (i = mddtp->mddt_cluster_cnt - 1; i >= 0; i--) {
memc = &mddtp->mddt_clusters[i];
if (!(memc->mddt_usage & (MDDT_NONVOLATILE | MDDT_PALCODE)))
break;
}
/*
* We want to extend the heap from 256k up to XTRA_PAGES more pages.
* We take pages from the end of the last usable memory region,
* taking care to avoid the memory used by the kernel's message
* buffer. We allow 4 pages for the message buffer.
*/
startpfn = memc->mddt_pfn + memc->mddt_pg_cnt - 4 - XTRA_PAGES;
startva = 0x20040000;
startpte = 0x40000000
+ (((startva >> 23) & 0x3ff) << PAGE_SHIFT)
+ (((startva >> 13) & 0x3ff) << 3);
for (i = 0; i < XTRA_PAGES; i++) {
u_int64_t pte;
pte = ((startpfn + i) << 32) | 0x1101;
*(u_int64_t *) (startpte + 8 * i) = pte;
}
}
int
main(void)
{
int i;
char bootfile[128];
/*
* Initialise the heap as early as possible. Once this is done,
* alloc() is usable. The stack is buried inside us, so this is
* safe.
*/
setheap((void *)end, (void *)(0x20040000 + XTRA_PAGES * 8192));
#ifdef LOADER
/*
* If this is the two stage disk loader, add the memory used by
* the first stage to the heap.
*/
free_region((void *)PRIMARY_LOAD_ADDRESS,
(void *)SECONDARY_LOAD_ADDRESS);
#endif
/*
* XXX Chicken-and-egg problem; we want to have console output
* early, but some console attributes may depend on reading from
* eg. the boot device, which we can't do yet. We can use
* printf() etc. once this is done.
*/
cons_probe();
/* switch to OSF pal code. */
OSFpal();
/*
* Initialise the block cache
*/
bcache_init(32, 512); /* 16k XXX tune this */
/*
* March through the device switch probing for things.
*/
for (i = 0; devsw[i] != NULL; i++)
if (devsw[i]->dv_init != NULL)
(devsw[i]->dv_init)();
printf("\n");
printf("%s, Revision %s\n", bootprog_name, bootprog_rev);
printf("(%s, %s)\n", bootprog_maker, bootprog_date);
printf("Memory: %ld k\n", memsize() / 1024);
/* We're booting from an SRM disk, try to spiff this */
currdev.d_dev = devsw[0]; /* XXX presumes that biosdisk is first in devsw */
currdev.d_type = currdev.d_dev->dv_type;
currdev.d_kind.srmdisk.unit = 0;
currdev.d_kind.srmdisk.slice = -1; /* XXX should be able to detect this, default to autoprobe */
currdev.d_kind.srmdisk.partition = 0; /* default to 'a' */
/* Create alpha-specific variables */
prom_getenv(PROM_E_BOOTED_FILE, bootfile, sizeof(bootfile));
if (bootfile[0])
setenv("bootfile", bootfile, 1);
env_setenv("currdev", EV_VOLATILE, alpha_fmtdev(&currdev), alpha_setcurrdev, env_nounset);
env_setenv("loaddev", EV_VOLATILE, alpha_fmtdev(&currdev), env_noset, env_nounset);
setenv("LINES", "24", 1); /* optional */
archsw.arch_autoload = alpha_autoload;
archsw.arch_getdev = alpha_getdev;
archsw.arch_copyin = alpha_copyin;
Bootstrap updates. - Move some startup code from MD to MI sections - Add a 'copyout' and some copyout-related functions. These will be obsoleted when BTX is available for the 386 and the kernel load area becomes directly addressable. - Add the ability load an arbitrary file as a module, associating and arbitrary type string with it. This can be used eg. for loading splash-screen images etc. - Add KLD module dependancy infrastructure. We know how to look for dependancies inside KLD modules, how to resolve these dependancies and what to do if things go wrong. Only works for a.out at the moment, due to lack of an MI ELF loader. Attach KLD module information to loaded modules as metadata, but don't pass it to the kernel (it can find it itself). - Load a.out KLD modules on a page boundary. Only pad the a.out BSS for the kernel, as it may want to throw symbols away. (We might want to do this for KLD modules too.) - Allow commands to be hidden from the '?' display, to avoid cluttering it with things like 'echo'. Add 'echo'. - Bring the 'prompt' command into line with the parser syntax. - Fix the verbose 'ls'; it was using an uninitialised stack variable. - Add a '-v' flag to 'lsmod' to have it display module metadata as well (not terribly useful for the average user) - Support a 'module searchpath' for required modules. - The bootstrap file on i386 is now called 'loader' to permit the /boot directory to use that name. - Discard the old i386 pread() function, as it's replaced by arch_readin()
1998-09-03 02:10:09 +00:00
archsw.arch_copyout = alpha_copyout;
archsw.arch_readin = alpha_readin;
/*
* SRM firmware takes *ages* to open the disk device. We hold it
* open until the closeall() when we exec the kernel. Note that
* we must close it eventually since otherwise the firmware leaves
* the ncr hardware in a broken state (at least it does on my EB164).
*/
open("/boot", O_RDONLY);
interact(); /* doesn't return */
return 0;
}
COMMAND_SET(reboot, "reboot", "reboot the system", command_reboot);
static int
command_reboot(int argc, char *argv[])
{
printf("Rebooting...\n");
delay(1000000);
reboot();
/* Note: we shouldn't get to this point! */
panic("Reboot failed!");
exit(0);
}
COMMAND_SET(halt, "halt", "halt the system", command_halt);
static int
command_halt(int argc, char *argv[])
{
halt(); /* never returns */
return(CMD_OK);
}
#if 0
COMMAND_SET(stack, "stack", "show stack usage", command_stack);
static int
command_stack(int argc, char *argv[])
{
char *cp;
for (cp = &stackbase; cp < &stacktop; cp++)
if (*cp != 0)
break;
printf("%d bytes of stack used\n", &stacktop - cp);
return(CMD_OK);
}
#endif
COMMAND_SET(heap, "heap", "show heap usage", command_heap);
static int
command_heap(int argc, char *argv[])
{
printf("heap base at %p, top at %p, used %ld\n", end, sbrk(0), sbrk(0) - end);
return(CMD_OK);
}