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/*-
* Copyright (c) 2013-2014 Robert N. M. Watson
* All rights reserved.
*
* This software was developed by SRI International and the University of
* Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
* ("CTSRD"), as part of the DARPA CRASH research programme.
*
* 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/linker.h>
#include <sys/reboot.h>
#include <machine/bootinfo.h>
#include <machine/elf.h>
#include <stand.h>
#include <bootstrap.h>
#include <loader.h>
#include <mips.h>
#ifdef LOADER_USB_SUPPORT
#include <storage/umass_common.h>
#endif
static int __elfN(exec)(struct preloaded_file *);
static void extract_currdev(struct bootinfo *);
struct devsw *devsw[] = {
&beri_cfi_disk,
&beri_sdcard_disk,
#ifdef LOADER_USB_SUPPORT
&umass_disk,
#endif
NULL
};
struct arch_switch archsw;
struct file_format *file_formats[] = {
&beri_elf,
NULL
};
struct fs_ops *file_system[] = {
#ifdef LOADER_UFS_SUPPORT
&ufs_fsops,
#endif
NULL
};
struct console *consoles[] = {
&altera_jtag_uart_console,
NULL
};
extern void __bss_start, __bss_end;
extern void __heap_start, __heap_end;
static int
__elfN(exec)(struct preloaded_file *fp)
{
return (EFTYPE);
}
/*
* Capture arguments from boot2 for later reuse when launching the kernel.
* Note that we choose not to maintain a pointer to boo2_bootinfop after
* initial argument processing: this is because we might load the kernel over
* the spot where boot2 was running, so we can't pass that pointer on to the
* kernel. To be on the safe side, never reference it outside of the body of
* main(), instead preserving a copy.
*/
int boot2_argc;
char **boot2_argv;
char **boot2_envv;
struct bootinfo boot2_bootinfo;
int
main(int argc, char *argv[], char *envv[], struct bootinfo *bootinfop)
{
struct devsw **dp;
/* NB: Must be sure to bzero() before using any globals. */
bzero(&__bss_start, (uintptr_t)&__bss_end - (uintptr_t)&__bss_start);
boot2_argc = argc;
boot2_argv = argv;
boot2_envv = envv;
boot2_bootinfo = *bootinfop; /* Copy rather than by reference. */
setheap((void *)&__heap_start, (void *)&__heap_end);
/*
* Pick up console settings from boot2; probe console.
*/
if (bootinfop->bi_boot2opts & RB_MULTIPLE) {
if (bootinfop->bi_boot2opts & RB_SERIAL)
setenv("console", "comconsole vidconsole", 1);
else
setenv("console", "vidconsole comconsole", 1);
} else if (bootinfop->bi_boot2opts & RB_SERIAL)
setenv("console", "comconsole", 1);
else if (bootinfop->bi_boot2opts & RB_MUTE)
setenv("console", "nullconsole", 1);
cons_probe();
setenv("LINES", "24", 1);
printf("%s(%d, %p, %p, %p (%p))\n", __func__, argc, argv, envv,
bootinfop, (void *)bootinfop->bi_memsize);
/*
* Initialise devices.
*/
for (dp = devsw; *dp != NULL; dp++) {
if ((*dp)->dv_init != NULL)
(*dp)->dv_init();
}
extract_currdev(bootinfop);
printf("\n%s", bootprog_info);
#if 0
printf("bootpath=\"%s\"\n", bootpath);
#endif
interact(NULL);
return (0);
}
static void
extract_currdev(struct bootinfo *bootinfop)
{
const char *bootdev;
/*
* Pick up boot device information from boot2.
*
* XXXRW: Someday: device units.
*/
switch(bootinfop->bi_boot_dev_type) {
case BOOTINFO_DEV_TYPE_DRAM:
bootdev = "dram0";
break;
case BOOTINFO_DEV_TYPE_CFI:
bootdev = "cfi0";
break;
case BOOTINFO_DEV_TYPE_SDCARD:
bootdev = "sdcard0";
break;
default:
bootdev = NULL;
}
if (bootdev != NULL) {
env_setenv("currdev", EV_VOLATILE, bootdev, NULL, env_nounset);
env_setenv("loaddev", EV_VOLATILE, bootdev, env_noset,
env_nounset);
}
}
void
abort(void)
{
printf("error: loader abort\n");
while (1);
}
void
exit(int code)
{
printf("error: loader exit\n");
while (1);
}
void
longjmperror(void)
{
printf("error: loader longjmp error\n");
while (1);
}
time_t
time(time_t *tloc)
{
/* We can't provide time since UTC, so just provide time since boot. */
return (cp0_count_get() / 100000000);
}
/*
* Delay - in usecs
*
* NOTE: We are assuming that the CPU is running at 100MHz.
*/
void
delay(int usecs)
{
uint32_t delta;
uint32_t curr;
uint32_t last;
last = cp0_count_get();
while (usecs > 0) {
curr = cp0_count_get();
delta = curr - last;
while (usecs > 0 && delta >= 100) {
usecs--;
last += 100;
delta -= 100;
}
}
}
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